| Message ID | 20190718225353.2078-12-denis.ciocca@st.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | iio:st_sensors: make use of regmap API | expand |
On Thu, 18 Jul 2019 15:53:53 -0700 Denis Ciocca <denis.ciocca@st.com> wrote: > This patch is meant to replace the i2c/spi transfer functions with > regmap. SPI framework requires DMA safe buffers so let's add GFP_DMA > flag for memory allocation used by bulk_read functions. > > Signed-off-by: Denis Ciocca <denis.ciocca@st.com> Applied, with the appropriate fuzz fixing form the fixup I applied to patch 10. Please take a look and make sure I didn't mess this up. Thanks, Jonathan > --- > Changes in v2: > memory allocation uses GFP_DMA if buffer is used in bulk_read > fix struct fields doc > > drivers/iio/accel/st_accel_buffer.c | 3 +- > drivers/iio/accel/st_accel_core.c | 3 - > drivers/iio/accel/st_accel_i2c.c | 4 +- > .../iio/common/st_sensors/st_sensors_buffer.c | 10 +- > .../iio/common/st_sensors/st_sensors_core.c | 41 +++---- > .../iio/common/st_sensors/st_sensors_i2c.c | 73 ++++++------- > .../iio/common/st_sensors/st_sensors_spi.c | 100 ++++-------------- > .../common/st_sensors/st_sensors_trigger.c | 10 +- > drivers/iio/gyro/st_gyro_buffer.c | 3 +- > drivers/iio/gyro/st_gyro_core.c | 3 - > drivers/iio/gyro/st_gyro_i2c.c | 4 +- > drivers/iio/magnetometer/st_magn_buffer.c | 3 +- > drivers/iio/magnetometer/st_magn_core.c | 3 - > drivers/iio/magnetometer/st_magn_i2c.c | 4 +- > drivers/iio/pressure/st_pressure_buffer.c | 3 +- > drivers/iio/pressure/st_pressure_core.c | 3 - > drivers/iio/pressure/st_pressure_i2c.c | 4 +- > include/linux/iio/common/st_sensors.h | 40 +------ > include/linux/iio/common/st_sensors_i2c.h | 4 +- > 19 files changed, 105 insertions(+), 213 deletions(-) > > diff --git a/drivers/iio/accel/st_accel_buffer.c b/drivers/iio/accel/st_accel_buffer.c > index 0205c0167cdd..05f9aea431e2 100644 > --- a/drivers/iio/accel/st_accel_buffer.c > +++ b/drivers/iio/accel/st_accel_buffer.c > @@ -39,7 +39,8 @@ static int st_accel_buffer_postenable(struct iio_dev *indio_dev) > int err; > struct st_sensor_data *adata = iio_priv(indio_dev); > > - adata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); > + adata->buffer_data = kmalloc(indio_dev->scan_bytes, > + GFP_DMA | GFP_KERNEL); > if (adata->buffer_data == NULL) { > err = -ENOMEM; > goto allocate_memory_error; > diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c > index 630909702a19..0b17004cb12e 100644 > --- a/drivers/iio/accel/st_accel_core.c > +++ b/drivers/iio/accel/st_accel_core.c > @@ -13,7 +13,6 @@ > #include <linux/acpi.h> > #include <linux/errno.h> > #include <linux/types.h> > -#include <linux/mutex.h> > #include <linux/interrupt.h> > #include <linux/i2c.h> > #include <linux/gpio.h> > @@ -1177,7 +1176,6 @@ int st_accel_common_probe(struct iio_dev *indio_dev) > > indio_dev->modes = INDIO_DIRECT_MODE; > indio_dev->info = &accel_info; > - mutex_init(&adata->tb.buf_lock); > > err = st_sensors_power_enable(indio_dev); > if (err) > @@ -1188,7 +1186,6 @@ int st_accel_common_probe(struct iio_dev *indio_dev) > goto st_accel_power_off; > > adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS; > - adata->multiread_bit = adata->sensor_settings->multi_read_bit; > indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; > > channels_size = indio_dev->num_channels * sizeof(struct iio_chan_spec); > diff --git a/drivers/iio/accel/st_accel_i2c.c b/drivers/iio/accel/st_accel_i2c.c > index a92cf776031e..50fa0fc32baa 100644 > --- a/drivers/iio/accel/st_accel_i2c.c > +++ b/drivers/iio/accel/st_accel_i2c.c > @@ -174,7 +174,9 @@ static int st_accel_i2c_probe(struct i2c_client *client) > adata = iio_priv(indio_dev); > adata->sensor_settings = (struct st_sensor_settings *)settings; > > - st_sensors_i2c_configure(indio_dev, client, adata); > + ret = st_sensors_i2c_configure(indio_dev, client); > + if (ret < 0) > + return ret; > > ret = st_accel_common_probe(indio_dev); > if (ret < 0) > diff --git a/drivers/iio/common/st_sensors/st_sensors_buffer.c b/drivers/iio/common/st_sensors/st_sensors_buffer.c > index 4a68669dc555..eee30130ae23 100644 > --- a/drivers/iio/common/st_sensors/st_sensors_buffer.c > +++ b/drivers/iio/common/st_sensors/st_sensors_buffer.c > @@ -17,15 +17,16 @@ > #include <linux/iio/trigger_consumer.h> > #include <linux/iio/triggered_buffer.h> > #include <linux/irqreturn.h> > +#include <linux/regmap.h> > > #include <linux/iio/common/st_sensors.h> > > > static int st_sensors_get_buffer_element(struct iio_dev *indio_dev, u8 *buf) > { > - int i; > struct st_sensor_data *sdata = iio_priv(indio_dev); > unsigned int num_data_channels = sdata->num_data_channels; > + int i; > > for_each_set_bit(i, indio_dev->active_scan_mask, num_data_channels) { > const struct iio_chan_spec *channel = &indio_dev->channels[i]; > @@ -36,11 +37,8 @@ static int st_sensors_get_buffer_element(struct iio_dev *indio_dev, u8 *buf) > channel->scan_type.storagebits >> 3; > > buf = PTR_ALIGN(buf, storage_bytes); > - if (sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev, > - channel->address, > - bytes_to_read, buf, > - sdata->multiread_bit) < > - bytes_to_read) > + if (regmap_bulk_read(sdata->regmap, channel->address, > + buf, bytes_to_read) < 0) > return -EIO; > > /* Advance the buffer pointer */ > diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c > index 40977d2ee400..4a3064fb6cd9 100644 > --- a/drivers/iio/common/st_sensors/st_sensors_core.c > +++ b/drivers/iio/common/st_sensors/st_sensors_core.c > @@ -15,6 +15,7 @@ > #include <linux/regulator/consumer.h> > #include <linux/of.h> > #include <linux/of_device.h> > +#include <linux/regmap.h> > #include <asm/unaligned.h> > #include <linux/iio/common/st_sensors.h> > > @@ -28,19 +29,10 @@ static inline u32 st_sensors_get_unaligned_le24(const u8 *p) > int st_sensors_write_data_with_mask(struct iio_dev *indio_dev, > u8 reg_addr, u8 mask, u8 data) > { > - int err; > - u8 new_data; > struct st_sensor_data *sdata = iio_priv(indio_dev); > > - err = sdata->tf->read_byte(&sdata->tb, sdata->dev, reg_addr, &new_data); > - if (err < 0) > - goto st_sensors_write_data_with_mask_error; > - > - new_data = ((new_data & (~mask)) | ((data << __ffs(mask)) & mask)); > - err = sdata->tf->write_byte(&sdata->tb, sdata->dev, reg_addr, new_data); > - > -st_sensors_write_data_with_mask_error: > - return err; > + return regmap_update_bits(sdata->regmap, > + reg_addr, mask, data << __ffs(mask)); > } > > int st_sensors_debugfs_reg_access(struct iio_dev *indio_dev, > @@ -48,19 +40,15 @@ int st_sensors_debugfs_reg_access(struct iio_dev *indio_dev, > unsigned *readval) > { > struct st_sensor_data *sdata = iio_priv(indio_dev); > - u8 readdata; > int err; > > if (!readval) > - return sdata->tf->write_byte(&sdata->tb, sdata->dev, > - (u8)reg, (u8)writeval); > + return regmap_write(sdata->regmap, reg, writeval); > > - err = sdata->tf->read_byte(&sdata->tb, sdata->dev, (u8)reg, &readdata); > + err = regmap_read(sdata->regmap, reg, readval); > if (err < 0) > return err; > > - *readval = (unsigned)readdata; > - > return 0; > } > EXPORT_SYMBOL(st_sensors_debugfs_reg_access); > @@ -545,7 +533,7 @@ int st_sensors_set_fullscale_by_gain(struct iio_dev *indio_dev, int scale) > EXPORT_SYMBOL(st_sensors_set_fullscale_by_gain); > > static int st_sensors_read_axis_data(struct iio_dev *indio_dev, > - struct iio_chan_spec const *ch, int *data) > + struct iio_chan_spec const *ch, int *data) > { > int err; > u8 *outdata; > @@ -554,13 +542,12 @@ static int st_sensors_read_axis_data(struct iio_dev *indio_dev, > > byte_for_channel = DIV_ROUND_UP(ch->scan_type.realbits + > ch->scan_type.shift, 8); > - outdata = kmalloc(byte_for_channel, GFP_KERNEL); > + outdata = kmalloc(byte_for_channel, GFP_DMA | GFP_KERNEL); > if (!outdata) > return -ENOMEM; > > - err = sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev, > - ch->address, byte_for_channel, > - outdata, sdata->multiread_bit); > + err = regmap_bulk_read(sdata->regmap, ch->address, > + outdata, byte_for_channel); > if (err < 0) > goto st_sensors_free_memory; > > @@ -645,13 +632,11 @@ EXPORT_SYMBOL(st_sensors_get_settings_index); > int st_sensors_verify_id(struct iio_dev *indio_dev) > { > struct st_sensor_data *sdata = iio_priv(indio_dev); > - int err; > - u8 wai; > + int wai, err; > > - if (settings->wai_addr) { > - err = sdata->tf->read_byte(&sdata->tb, sdata->dev, > - sdata->sensor_settings->wai_addr, > - &wai); > + if (sdata->sensor_settings->wai_addr) { > + err = regmap_read(sdata->regmap, > + sdata->sensor_settings->wai_addr, &wai); > if (err < 0) { > dev_err(&indio_dev->dev, > "failed to read Who-Am-I register.\n"); > diff --git a/drivers/iio/common/st_sensors/st_sensors_i2c.c b/drivers/iio/common/st_sensors/st_sensors_i2c.c > index b1c9812407e7..9240625534df 100644 > --- a/drivers/iio/common/st_sensors/st_sensors_i2c.c > +++ b/drivers/iio/common/st_sensors/st_sensors_i2c.c > @@ -13,6 +13,7 @@ > #include <linux/iio/iio.h> > #include <linux/of_device.h> > #include <linux/acpi.h> > +#include <linux/regmap.h> > > #include <linux/iio/common/st_sensors_i2c.h> > > @@ -26,55 +27,51 @@ static unsigned int st_sensors_i2c_get_irq(struct iio_dev *indio_dev) > return to_i2c_client(sdata->dev)->irq; > } > > -static int st_sensors_i2c_read_byte(struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, u8 *res_byte) > -{ > - int err; > - > - err = i2c_smbus_read_byte_data(to_i2c_client(dev), reg_addr); > - if (err < 0) > - goto st_accel_i2c_read_byte_error; > - > - *res_byte = err & 0xff; > - > -st_accel_i2c_read_byte_error: > - return err < 0 ? err : 0; > -} > - > -static int st_sensors_i2c_read_multiple_byte( > - struct st_sensor_transfer_buffer *tb, struct device *dev, > - u8 reg_addr, int len, u8 *data, bool multiread_bit) > -{ > - if (multiread_bit) > - reg_addr |= ST_SENSORS_I2C_MULTIREAD; > - > - return i2c_smbus_read_i2c_block_data_or_emulated(to_i2c_client(dev), > - reg_addr, len, data); > -} > - > -static int st_sensors_i2c_write_byte(struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, u8 data) > -{ > - return i2c_smbus_write_byte_data(to_i2c_client(dev), reg_addr, data); > -} > +static const struct regmap_config st_sensors_i2c_regmap_config = { > + .reg_bits = 8, > + .val_bits = 8, > +}; > > -static const struct st_sensor_transfer_function st_sensors_tf_i2c = { > - .read_byte = st_sensors_i2c_read_byte, > - .write_byte = st_sensors_i2c_write_byte, > - .read_multiple_byte = st_sensors_i2c_read_multiple_byte, > +static const struct regmap_config st_sensors_i2c_regmap_multiread_bit_config = { > + .reg_bits = 8, > + .val_bits = 8, > + .read_flag_mask = ST_SENSORS_I2C_MULTIREAD, > }; > > -void st_sensors_i2c_configure(struct iio_dev *indio_dev, > - struct i2c_client *client, struct st_sensor_data *sdata) > +/* > + * st_sensors_i2c_configure() - configure I2C interface > + * @indio_dev: IIO device reference. > + * @client: i2c client reference. > + * > + * Return: 0 on success, else a negative error code. > + */ > +int st_sensors_i2c_configure(struct iio_dev *indio_dev, > + struct i2c_client *client) > { > + struct st_sensor_data *sdata = iio_priv(indio_dev); > + const struct regmap_config *config; > + > + if (sdata->sensor_settings->multi_read_bit) > + config = &st_sensors_i2c_regmap_multiread_bit_config; > + else > + config = &st_sensors_i2c_regmap_config; > + > + sdata->regmap = devm_regmap_init_i2c(client, config); > + if (IS_ERR(sdata->regmap)) { > + dev_err(&client->dev, "Failed to register i2c regmap (%d)\n", > + (int)PTR_ERR(sdata->regmap)); > + return PTR_ERR(sdata->regmap); > + } > + > i2c_set_clientdata(client, indio_dev); > > indio_dev->dev.parent = &client->dev; > indio_dev->name = client->name; > > sdata->dev = &client->dev; > - sdata->tf = &st_sensors_tf_i2c; > sdata->get_irq_data_ready = st_sensors_i2c_get_irq; > + > + return 0; > } > EXPORT_SYMBOL(st_sensors_i2c_configure); > > diff --git a/drivers/iio/common/st_sensors/st_sensors_spi.c b/drivers/iio/common/st_sensors/st_sensors_spi.c > index a57cd648975c..9c0661a283d0 100644 > --- a/drivers/iio/common/st_sensors/st_sensors_spi.c > +++ b/drivers/iio/common/st_sensors/st_sensors_spi.c > @@ -11,12 +11,12 @@ > #include <linux/module.h> > #include <linux/slab.h> > #include <linux/iio/iio.h> > +#include <linux/regmap.h> > > #include <linux/iio/common/st_sensors_spi.h> > - > +#include "st_sensors_core.h" > > #define ST_SENSORS_SPI_MULTIREAD 0xc0 > -#define ST_SENSORS_SPI_READ 0x80 > > static unsigned int st_sensors_spi_get_irq(struct iio_dev *indio_dev) > { > @@ -25,81 +25,15 @@ static unsigned int st_sensors_spi_get_irq(struct iio_dev *indio_dev) > return to_spi_device(sdata->dev)->irq; > } > > -static int st_sensors_spi_read(struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, int len, u8 *data, bool multiread_bit) > -{ > - int err; > - > - struct spi_transfer xfers[] = { > - { > - .tx_buf = tb->tx_buf, > - .bits_per_word = 8, > - .len = 1, > - }, > - { > - .rx_buf = tb->rx_buf, > - .bits_per_word = 8, > - .len = len, > - } > - }; > - > - mutex_lock(&tb->buf_lock); > - if ((multiread_bit) && (len > 1)) > - tb->tx_buf[0] = reg_addr | ST_SENSORS_SPI_MULTIREAD; > - else > - tb->tx_buf[0] = reg_addr | ST_SENSORS_SPI_READ; > - > - err = spi_sync_transfer(to_spi_device(dev), xfers, ARRAY_SIZE(xfers)); > - if (err) > - goto acc_spi_read_error; > - > - memcpy(data, tb->rx_buf, len); > - mutex_unlock(&tb->buf_lock); > - return len; > - > -acc_spi_read_error: > - mutex_unlock(&tb->buf_lock); > - return err; > -} > - > -static int st_sensors_spi_read_byte(struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, u8 *res_byte) > -{ > - return st_sensors_spi_read(tb, dev, reg_addr, 1, res_byte, false); > -} > - > -static int st_sensors_spi_read_multiple_byte( > - struct st_sensor_transfer_buffer *tb, struct device *dev, > - u8 reg_addr, int len, u8 *data, bool multiread_bit) > -{ > - return st_sensors_spi_read(tb, dev, reg_addr, len, data, multiread_bit); > -} > - > -static int st_sensors_spi_write_byte(struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, u8 data) > -{ > - int err; > - > - struct spi_transfer xfers = { > - .tx_buf = tb->tx_buf, > - .bits_per_word = 8, > - .len = 2, > - }; > - > - mutex_lock(&tb->buf_lock); > - tb->tx_buf[0] = reg_addr; > - tb->tx_buf[1] = data; > - > - err = spi_sync_transfer(to_spi_device(dev), &xfers, 1); > - mutex_unlock(&tb->buf_lock); > - > - return err; > -} > +static const struct regmap_config st_sensors_spi_regmap_config = { > + .reg_bits = 8, > + .val_bits = 8, > +}; > > -static const struct st_sensor_transfer_function st_sensors_tf_spi = { > - .read_byte = st_sensors_spi_read_byte, > - .write_byte = st_sensors_spi_write_byte, > - .read_multiple_byte = st_sensors_spi_read_multiple_byte, > +static const struct regmap_config st_sensors_spi_regmap_multiread_bit_config = { > + .reg_bits = 8, > + .val_bits = 8, > + .read_flag_mask = ST_SENSORS_SPI_MULTIREAD, > }; > > /* > @@ -155,6 +89,7 @@ int st_sensors_spi_configure(struct iio_dev *indio_dev, > struct spi_device *spi) > { > struct st_sensor_data *sdata = iio_priv(indio_dev); > + const struct regmap_config *config; > int err; > > if (st_sensors_is_spi_3_wire(spi)) { > @@ -164,13 +99,24 @@ int st_sensors_spi_configure(struct iio_dev *indio_dev, > return err; > } > > + if (sdata->sensor_settings->multi_read_bit) > + config = &st_sensors_spi_regmap_multiread_bit_config; > + else > + config = &st_sensors_spi_regmap_config; > + > + sdata->regmap = devm_regmap_init_spi(spi, config); > + if (IS_ERR(sdata->regmap)) { > + dev_err(&spi->dev, "Failed to register spi regmap (%d)\n", > + (int)PTR_ERR(sdata->regmap)); > + return PTR_ERR(sdata->regmap); > + } > + > spi_set_drvdata(spi, indio_dev); > > indio_dev->dev.parent = &spi->dev; > indio_dev->name = spi->modalias; > > sdata->dev = &spi->dev; > - sdata->tf = &st_sensors_tf_spi; > sdata->get_irq_data_ready = st_sensors_spi_get_irq; > > return 0; > diff --git a/drivers/iio/common/st_sensors/st_sensors_trigger.c b/drivers/iio/common/st_sensors/st_sensors_trigger.c > index 630c8cb35e8b..bed7b8682b17 100644 > --- a/drivers/iio/common/st_sensors/st_sensors_trigger.c > +++ b/drivers/iio/common/st_sensors/st_sensors_trigger.c > @@ -13,6 +13,7 @@ > #include <linux/iio/iio.h> > #include <linux/iio/trigger.h> > #include <linux/interrupt.h> > +#include <linux/regmap.h> > #include <linux/iio/common/st_sensors.h> > #include "st_sensors_core.h" > > @@ -26,8 +27,7 @@ > static int st_sensors_new_samples_available(struct iio_dev *indio_dev, > struct st_sensor_data *sdata) > { > - u8 status; > - int ret; > + int ret, status; > > /* How would I know if I can't check it? */ > if (!sdata->sensor_settings->drdy_irq.stat_drdy.addr) > @@ -37,9 +37,9 @@ static int st_sensors_new_samples_available(struct iio_dev *indio_dev, > if (!indio_dev->active_scan_mask) > return 0; > > - ret = sdata->tf->read_byte(&sdata->tb, sdata->dev, > - sdata->sensor_settings->drdy_irq.stat_drdy.addr, > - &status); > + ret = regmap_read(sdata->regmap, > + sdata->sensor_settings->drdy_irq.stat_drdy.addr, > + &status); > if (ret < 0) { > dev_err(sdata->dev, > "error checking samples available\n"); > diff --git a/drivers/iio/gyro/st_gyro_buffer.c b/drivers/iio/gyro/st_gyro_buffer.c > index 6e362f735e92..21360681d4dd 100644 > --- a/drivers/iio/gyro/st_gyro_buffer.c > +++ b/drivers/iio/gyro/st_gyro_buffer.c > @@ -39,7 +39,8 @@ static int st_gyro_buffer_postenable(struct iio_dev *indio_dev) > int err; > struct st_sensor_data *gdata = iio_priv(indio_dev); > > - gdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); > + gdata->buffer_data = kmalloc(indio_dev->scan_bytes, > + GFP_DMA | GFP_KERNEL); > if (gdata->buffer_data == NULL) { > err = -ENOMEM; > goto allocate_memory_error; > diff --git a/drivers/iio/gyro/st_gyro_core.c b/drivers/iio/gyro/st_gyro_core.c > index 4b87e79aa744..02e42c945181 100644 > --- a/drivers/iio/gyro/st_gyro_core.c > +++ b/drivers/iio/gyro/st_gyro_core.c > @@ -12,7 +12,6 @@ > #include <linux/slab.h> > #include <linux/errno.h> > #include <linux/types.h> > -#include <linux/mutex.h> > #include <linux/interrupt.h> > #include <linux/i2c.h> > #include <linux/gpio.h> > @@ -394,7 +393,6 @@ int st_gyro_common_probe(struct iio_dev *indio_dev) > > indio_dev->modes = INDIO_DIRECT_MODE; > indio_dev->info = &gyro_info; > - mutex_init(&gdata->tb.buf_lock); > > err = st_sensors_power_enable(indio_dev); > if (err) > @@ -405,7 +403,6 @@ int st_gyro_common_probe(struct iio_dev *indio_dev) > goto st_gyro_power_off; > > gdata->num_data_channels = ST_GYRO_NUMBER_DATA_CHANNELS; > - gdata->multiread_bit = gdata->sensor_settings->multi_read_bit; > indio_dev->channels = gdata->sensor_settings->ch; > indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; > > diff --git a/drivers/iio/gyro/st_gyro_i2c.c b/drivers/iio/gyro/st_gyro_i2c.c > index fa71e94b76f4..05a1a0874bd5 100644 > --- a/drivers/iio/gyro/st_gyro_i2c.c > +++ b/drivers/iio/gyro/st_gyro_i2c.c > @@ -87,7 +87,9 @@ static int st_gyro_i2c_probe(struct i2c_client *client, > gdata = iio_priv(indio_dev); > gdata->sensor_settings = (struct st_sensor_settings *)settings; > > - st_sensors_i2c_configure(indio_dev, client, gdata); > + err = st_sensors_i2c_configure(indio_dev, client); > + if (err < 0) > + return err; > > err = st_gyro_common_probe(indio_dev); > if (err < 0) > diff --git a/drivers/iio/magnetometer/st_magn_buffer.c b/drivers/iio/magnetometer/st_magn_buffer.c > index 11d7806655bc..9dba93539a99 100644 > --- a/drivers/iio/magnetometer/st_magn_buffer.c > +++ b/drivers/iio/magnetometer/st_magn_buffer.c > @@ -34,7 +34,8 @@ static int st_magn_buffer_postenable(struct iio_dev *indio_dev) > int err; > struct st_sensor_data *mdata = iio_priv(indio_dev); > > - mdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); > + mdata->buffer_data = kmalloc(indio_dev->scan_bytes, > + GFP_DMA | GFP_KERNEL); > if (mdata->buffer_data == NULL) { > err = -ENOMEM; > goto allocate_memory_error; > diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c > index 3f313aefece6..804353a483c7 100644 > --- a/drivers/iio/magnetometer/st_magn_core.c > +++ b/drivers/iio/magnetometer/st_magn_core.c > @@ -12,7 +12,6 @@ > #include <linux/slab.h> > #include <linux/errno.h> > #include <linux/types.h> > -#include <linux/mutex.h> > #include <linux/interrupt.h> > #include <linux/i2c.h> > #include <linux/gpio.h> > @@ -496,7 +495,6 @@ int st_magn_common_probe(struct iio_dev *indio_dev) > > indio_dev->modes = INDIO_DIRECT_MODE; > indio_dev->info = &magn_info; > - mutex_init(&mdata->tb.buf_lock); > > err = st_sensors_power_enable(indio_dev); > if (err) > @@ -507,7 +505,6 @@ int st_magn_common_probe(struct iio_dev *indio_dev) > goto st_magn_power_off; > > mdata->num_data_channels = ST_MAGN_NUMBER_DATA_CHANNELS; > - mdata->multiread_bit = mdata->sensor_settings->multi_read_bit; > indio_dev->channels = mdata->sensor_settings->ch; > indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; > > diff --git a/drivers/iio/magnetometer/st_magn_i2c.c b/drivers/iio/magnetometer/st_magn_i2c.c > index d5d565639bed..fdba480a12be 100644 > --- a/drivers/iio/magnetometer/st_magn_i2c.c > +++ b/drivers/iio/magnetometer/st_magn_i2c.c > @@ -79,7 +79,9 @@ static int st_magn_i2c_probe(struct i2c_client *client, > mdata = iio_priv(indio_dev); > mdata->sensor_settings = (struct st_sensor_settings *)settings; > > - st_sensors_i2c_configure(indio_dev, client, mdata); > + err = st_sensors_i2c_configure(indio_dev, client); > + if (err < 0) > + return err; > > err = st_magn_common_probe(indio_dev); > if (err < 0) > diff --git a/drivers/iio/pressure/st_pressure_buffer.c b/drivers/iio/pressure/st_pressure_buffer.c > index 4566e08a64a1..f21b630abaa0 100644 > --- a/drivers/iio/pressure/st_pressure_buffer.c > +++ b/drivers/iio/pressure/st_pressure_buffer.c > @@ -39,7 +39,8 @@ static int st_press_buffer_postenable(struct iio_dev *indio_dev) > int err; > struct st_sensor_data *press_data = iio_priv(indio_dev); > > - press_data->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); > + press_data->buffer_data = kmalloc(indio_dev->scan_bytes, > + GFP_DMA | GFP_KERNEL); > if (press_data->buffer_data == NULL) { > err = -ENOMEM; > goto allocate_memory_error; > diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c > index a783fc075c26..9ef92a501286 100644 > --- a/drivers/iio/pressure/st_pressure_core.c > +++ b/drivers/iio/pressure/st_pressure_core.c > @@ -12,7 +12,6 @@ > #include <linux/slab.h> > #include <linux/errno.h> > #include <linux/types.h> > -#include <linux/mutex.h> > #include <linux/interrupt.h> > #include <linux/i2c.h> > #include <linux/gpio.h> > @@ -692,7 +691,6 @@ int st_press_common_probe(struct iio_dev *indio_dev) > > indio_dev->modes = INDIO_DIRECT_MODE; > indio_dev->info = &press_info; > - mutex_init(&press_data->tb.buf_lock); > > err = st_sensors_power_enable(indio_dev); > if (err) > @@ -709,7 +707,6 @@ int st_press_common_probe(struct iio_dev *indio_dev) > * element. > */ > press_data->num_data_channels = press_data->sensor_settings->num_ch - 1; > - press_data->multiread_bit = press_data->sensor_settings->multi_read_bit; > indio_dev->channels = press_data->sensor_settings->ch; > indio_dev->num_channels = press_data->sensor_settings->num_ch; > > diff --git a/drivers/iio/pressure/st_pressure_i2c.c b/drivers/iio/pressure/st_pressure_i2c.c > index 466e7dde5eae..71d2ed6b4948 100644 > --- a/drivers/iio/pressure/st_pressure_i2c.c > +++ b/drivers/iio/pressure/st_pressure_i2c.c > @@ -112,7 +112,9 @@ static int st_press_i2c_probe(struct i2c_client *client, > press_data = iio_priv(indio_dev); > press_data->sensor_settings = (struct st_sensor_settings *)settings; > > - st_sensors_i2c_configure(indio_dev, client, press_data); > + ret = st_sensors_i2c_configure(indio_dev, client); > + if (ret < 0) > + return ret; > > ret = st_press_common_probe(indio_dev); > if (ret < 0) > diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h > index 566b955e2980..28fc1f9fa7d5 100644 > --- a/include/linux/iio/common/st_sensors.h > +++ b/include/linux/iio/common/st_sensors.h > @@ -16,6 +16,7 @@ > #include <linux/iio/trigger.h> > #include <linux/bitops.h> > #include <linux/regulator/consumer.h> > +#include <linux/regmap.h> > > #include <linux/platform_data/st_sensors_pdata.h> > > @@ -169,36 +170,6 @@ struct st_sensor_data_ready_irq { > } ig1; > }; > > -/** > - * struct st_sensor_transfer_buffer - ST sensor device I/O buffer > - * @buf_lock: Mutex to protect rx and tx buffers. > - * @tx_buf: Buffer used by SPI transfer function to send data to the sensors. > - * This buffer is used to avoid DMA not-aligned issue. > - * @rx_buf: Buffer used by SPI transfer to receive data from sensors. > - * This buffer is used to avoid DMA not-aligned issue. > - */ > -struct st_sensor_transfer_buffer { > - struct mutex buf_lock; > - u8 rx_buf[ST_SENSORS_RX_MAX_LENGTH]; > - u8 tx_buf[ST_SENSORS_TX_MAX_LENGTH] ____cacheline_aligned; > -}; > - > -/** > - * struct st_sensor_transfer_function - ST sensor device I/O function > - * @read_byte: Function used to read one byte. > - * @write_byte: Function used to write one byte. > - * @read_multiple_byte: Function used to read multiple byte. > - */ > -struct st_sensor_transfer_function { > - int (*read_byte) (struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, u8 *res_byte); > - int (*write_byte) (struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, u8 data); > - int (*read_multiple_byte) (struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, int len, u8 *data, > - bool multiread_bit); > -}; > - > /** > * struct st_sensor_settings - ST specific sensor settings > * @wai: Contents of WhoAmI register. > @@ -242,16 +213,14 @@ struct st_sensor_settings { > * @current_fullscale: Maximum range of measure by the sensor. > * @vdd: Pointer to sensor's Vdd power supply > * @vdd_io: Pointer to sensor's Vdd-IO power supply > + * @regmap: Pointer to specific sensor regmap configuration. > * @enabled: Status of the sensor (false->off, true->on). > - * @multiread_bit: Use or not particular bit for [I2C/SPI] multiread. > * @buffer_data: Data used by buffer part. > * @odr: Output data rate of the sensor [Hz]. > * num_data_channels: Number of data channels used in buffer. > * @drdy_int_pin: Redirect DRDY on pin 1 (1) or pin 2 (2). > * @int_pin_open_drain: Set the interrupt/DRDY to open drain. > * @get_irq_data_ready: Function to get the IRQ used for data ready signal. > - * @tf: Transfer function structure used by I/O operations. > - * @tb: Transfer buffers and mutex used by I/O operations. > * @edge_irq: the IRQ triggers on edges and need special handling. > * @hw_irq_trigger: if we're using the hardware interrupt on the sensor. > * @hw_timestamp: Latest timestamp from the interrupt handler, when in use. > @@ -264,9 +233,9 @@ struct st_sensor_data { > struct st_sensor_fullscale_avl *current_fullscale; > struct regulator *vdd; > struct regulator *vdd_io; > + struct regmap *regmap; > > bool enabled; > - bool multiread_bit; > > char *buffer_data; > > @@ -278,9 +247,6 @@ struct st_sensor_data { > > unsigned int (*get_irq_data_ready) (struct iio_dev *indio_dev); > > - const struct st_sensor_transfer_function *tf; > - struct st_sensor_transfer_buffer tb; > - > bool edge_irq; > bool hw_irq_trigger; > s64 hw_timestamp; > diff --git a/include/linux/iio/common/st_sensors_i2c.h b/include/linux/iio/common/st_sensors_i2c.h > index 5ada89944698..01e424e2af4f 100644 > --- a/include/linux/iio/common/st_sensors_i2c.h > +++ b/include/linux/iio/common/st_sensors_i2c.h > @@ -14,8 +14,8 @@ > #include <linux/iio/common/st_sensors.h> > #include <linux/of.h> > > -void st_sensors_i2c_configure(struct iio_dev *indio_dev, > - struct i2c_client *client, struct st_sensor_data *sdata); > +int st_sensors_i2c_configure(struct iio_dev *indio_dev, > + struct i2c_client *client); > > #ifdef CONFIG_ACPI > int st_sensors_match_acpi_device(struct device *dev);
Hi Jonathan, Just checked testing branch and it looks good to me. Thanks! Denis -----Original Message----- From: Jonathan Cameron <jic23@kernel.org> Sent: Sunday, July 21, 2019 11:06 AM To: Denis CIOCCA <denis.ciocca@st.com> Cc: linux-iio@vger.kernel.org Subject: Re: [PATCH v2 11/11] iio: make st_sensors drivers use regmap On Thu, 18 Jul 2019 15:53:53 -0700 Denis Ciocca <denis.ciocca@st.com> wrote: > This patch is meant to replace the i2c/spi transfer functions with > regmap. SPI framework requires DMA safe buffers so let's add GFP_DMA > flag for memory allocation used by bulk_read functions. > > Signed-off-by: Denis Ciocca <denis.ciocca@st.com> Applied, with the appropriate fuzz fixing form the fixup I applied to patch 10. Please take a look and make sure I didn't mess this up. Thanks, Jonathan > --- > Changes in v2: > memory allocation uses GFP_DMA if buffer is used in bulk_read fix > struct fields doc > > drivers/iio/accel/st_accel_buffer.c | 3 +- > drivers/iio/accel/st_accel_core.c | 3 - > drivers/iio/accel/st_accel_i2c.c | 4 +- > .../iio/common/st_sensors/st_sensors_buffer.c | 10 +- > .../iio/common/st_sensors/st_sensors_core.c | 41 +++---- > .../iio/common/st_sensors/st_sensors_i2c.c | 73 ++++++------- > .../iio/common/st_sensors/st_sensors_spi.c | 100 ++++-------------- > .../common/st_sensors/st_sensors_trigger.c | 10 +- > drivers/iio/gyro/st_gyro_buffer.c | 3 +- > drivers/iio/gyro/st_gyro_core.c | 3 - > drivers/iio/gyro/st_gyro_i2c.c | 4 +- > drivers/iio/magnetometer/st_magn_buffer.c | 3 +- > drivers/iio/magnetometer/st_magn_core.c | 3 - > drivers/iio/magnetometer/st_magn_i2c.c | 4 +- > drivers/iio/pressure/st_pressure_buffer.c | 3 +- > drivers/iio/pressure/st_pressure_core.c | 3 - > drivers/iio/pressure/st_pressure_i2c.c | 4 +- > include/linux/iio/common/st_sensors.h | 40 +------ > include/linux/iio/common/st_sensors_i2c.h | 4 +- > 19 files changed, 105 insertions(+), 213 deletions(-) > > diff --git a/drivers/iio/accel/st_accel_buffer.c > b/drivers/iio/accel/st_accel_buffer.c > index 0205c0167cdd..05f9aea431e2 100644 > --- a/drivers/iio/accel/st_accel_buffer.c > +++ b/drivers/iio/accel/st_accel_buffer.c > @@ -39,7 +39,8 @@ static int st_accel_buffer_postenable(struct iio_dev *indio_dev) > int err; > struct st_sensor_data *adata = iio_priv(indio_dev); > > - adata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); > + adata->buffer_data = kmalloc(indio_dev->scan_bytes, > + GFP_DMA | GFP_KERNEL); > if (adata->buffer_data == NULL) { > err = -ENOMEM; > goto allocate_memory_error; > diff --git a/drivers/iio/accel/st_accel_core.c > b/drivers/iio/accel/st_accel_core.c > index 630909702a19..0b17004cb12e 100644 > --- a/drivers/iio/accel/st_accel_core.c > +++ b/drivers/iio/accel/st_accel_core.c > @@ -13,7 +13,6 @@ > #include <linux/acpi.h> > #include <linux/errno.h> > #include <linux/types.h> > -#include <linux/mutex.h> > #include <linux/interrupt.h> > #include <linux/i2c.h> > #include <linux/gpio.h> > @@ -1177,7 +1176,6 @@ int st_accel_common_probe(struct iio_dev > *indio_dev) > > indio_dev->modes = INDIO_DIRECT_MODE; > indio_dev->info = &accel_info; > - mutex_init(&adata->tb.buf_lock); > > err = st_sensors_power_enable(indio_dev); > if (err) > @@ -1188,7 +1186,6 @@ int st_accel_common_probe(struct iio_dev *indio_dev) > goto st_accel_power_off; > > adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS; > - adata->multiread_bit = adata->sensor_settings->multi_read_bit; > indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; > > channels_size = indio_dev->num_channels * sizeof(struct > iio_chan_spec); diff --git a/drivers/iio/accel/st_accel_i2c.c > b/drivers/iio/accel/st_accel_i2c.c > index a92cf776031e..50fa0fc32baa 100644 > --- a/drivers/iio/accel/st_accel_i2c.c > +++ b/drivers/iio/accel/st_accel_i2c.c > @@ -174,7 +174,9 @@ static int st_accel_i2c_probe(struct i2c_client *client) > adata = iio_priv(indio_dev); > adata->sensor_settings = (struct st_sensor_settings *)settings; > > - st_sensors_i2c_configure(indio_dev, client, adata); > + ret = st_sensors_i2c_configure(indio_dev, client); > + if (ret < 0) > + return ret; > > ret = st_accel_common_probe(indio_dev); > if (ret < 0) > diff --git a/drivers/iio/common/st_sensors/st_sensors_buffer.c > b/drivers/iio/common/st_sensors/st_sensors_buffer.c > index 4a68669dc555..eee30130ae23 100644 > --- a/drivers/iio/common/st_sensors/st_sensors_buffer.c > +++ b/drivers/iio/common/st_sensors/st_sensors_buffer.c > @@ -17,15 +17,16 @@ > #include <linux/iio/trigger_consumer.h> #include > <linux/iio/triggered_buffer.h> #include <linux/irqreturn.h> > +#include <linux/regmap.h> > > #include <linux/iio/common/st_sensors.h> > > > static int st_sensors_get_buffer_element(struct iio_dev *indio_dev, > u8 *buf) { > - int i; > struct st_sensor_data *sdata = iio_priv(indio_dev); > unsigned int num_data_channels = sdata->num_data_channels; > + int i; > > for_each_set_bit(i, indio_dev->active_scan_mask, num_data_channels) { > const struct iio_chan_spec *channel = &indio_dev->channels[i]; @@ > -36,11 +37,8 @@ static int st_sensors_get_buffer_element(struct iio_dev *indio_dev, u8 *buf) > channel->scan_type.storagebits >> 3; > > buf = PTR_ALIGN(buf, storage_bytes); > - if (sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev, > - channel->address, > - bytes_to_read, buf, > - sdata->multiread_bit) < > - bytes_to_read) > + if (regmap_bulk_read(sdata->regmap, channel->address, > + buf, bytes_to_read) < 0) > return -EIO; > > /* Advance the buffer pointer */ > diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c > b/drivers/iio/common/st_sensors/st_sensors_core.c > index 40977d2ee400..4a3064fb6cd9 100644 > --- a/drivers/iio/common/st_sensors/st_sensors_core.c > +++ b/drivers/iio/common/st_sensors/st_sensors_core.c > @@ -15,6 +15,7 @@ > #include <linux/regulator/consumer.h> #include <linux/of.h> > #include <linux/of_device.h> > +#include <linux/regmap.h> > #include <asm/unaligned.h> > #include <linux/iio/common/st_sensors.h> > > @@ -28,19 +29,10 @@ static inline u32 > st_sensors_get_unaligned_le24(const u8 *p) int st_sensors_write_data_with_mask(struct iio_dev *indio_dev, > u8 reg_addr, u8 mask, u8 data) { > - int err; > - u8 new_data; > struct st_sensor_data *sdata = iio_priv(indio_dev); > > - err = sdata->tf->read_byte(&sdata->tb, sdata->dev, reg_addr, &new_data); > - if (err < 0) > - goto st_sensors_write_data_with_mask_error; > - > - new_data = ((new_data & (~mask)) | ((data << __ffs(mask)) & mask)); > - err = sdata->tf->write_byte(&sdata->tb, sdata->dev, reg_addr, new_data); > - > -st_sensors_write_data_with_mask_error: > - return err; > + return regmap_update_bits(sdata->regmap, > + reg_addr, mask, data << __ffs(mask)); > } > > int st_sensors_debugfs_reg_access(struct iio_dev *indio_dev, @@ > -48,19 +40,15 @@ int st_sensors_debugfs_reg_access(struct iio_dev *indio_dev, > unsigned *readval) > { > struct st_sensor_data *sdata = iio_priv(indio_dev); > - u8 readdata; > int err; > > if (!readval) > - return sdata->tf->write_byte(&sdata->tb, sdata->dev, > - (u8)reg, (u8)writeval); > + return regmap_write(sdata->regmap, reg, writeval); > > - err = sdata->tf->read_byte(&sdata->tb, sdata->dev, (u8)reg, &readdata); > + err = regmap_read(sdata->regmap, reg, readval); > if (err < 0) > return err; > > - *readval = (unsigned)readdata; > - > return 0; > } > EXPORT_SYMBOL(st_sensors_debugfs_reg_access); > @@ -545,7 +533,7 @@ int st_sensors_set_fullscale_by_gain(struct > iio_dev *indio_dev, int scale) > EXPORT_SYMBOL(st_sensors_set_fullscale_by_gain); > > static int st_sensors_read_axis_data(struct iio_dev *indio_dev, > - struct iio_chan_spec const *ch, int *data) > + struct iio_chan_spec const *ch, int *data) > { > int err; > u8 *outdata; > @@ -554,13 +542,12 @@ static int st_sensors_read_axis_data(struct > iio_dev *indio_dev, > > byte_for_channel = DIV_ROUND_UP(ch->scan_type.realbits + > ch->scan_type.shift, 8); > - outdata = kmalloc(byte_for_channel, GFP_KERNEL); > + outdata = kmalloc(byte_for_channel, GFP_DMA | GFP_KERNEL); > if (!outdata) > return -ENOMEM; > > - err = sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev, > - ch->address, byte_for_channel, > - outdata, sdata->multiread_bit); > + err = regmap_bulk_read(sdata->regmap, ch->address, > + outdata, byte_for_channel); > if (err < 0) > goto st_sensors_free_memory; > > @@ -645,13 +632,11 @@ EXPORT_SYMBOL(st_sensors_get_settings_index); > int st_sensors_verify_id(struct iio_dev *indio_dev) { > struct st_sensor_data *sdata = iio_priv(indio_dev); > - int err; > - u8 wai; > + int wai, err; > > - if (settings->wai_addr) { > - err = sdata->tf->read_byte(&sdata->tb, sdata->dev, > - sdata->sensor_settings->wai_addr, > - &wai); > + if (sdata->sensor_settings->wai_addr) { > + err = regmap_read(sdata->regmap, > + sdata->sensor_settings->wai_addr, &wai); > if (err < 0) { > dev_err(&indio_dev->dev, > "failed to read Who-Am-I register.\n"); diff --git > a/drivers/iio/common/st_sensors/st_sensors_i2c.c > b/drivers/iio/common/st_sensors/st_sensors_i2c.c > index b1c9812407e7..9240625534df 100644 > --- a/drivers/iio/common/st_sensors/st_sensors_i2c.c > +++ b/drivers/iio/common/st_sensors/st_sensors_i2c.c > @@ -13,6 +13,7 @@ > #include <linux/iio/iio.h> > #include <linux/of_device.h> > #include <linux/acpi.h> > +#include <linux/regmap.h> > > #include <linux/iio/common/st_sensors_i2c.h> > > @@ -26,55 +27,51 @@ static unsigned int st_sensors_i2c_get_irq(struct iio_dev *indio_dev) > return to_i2c_client(sdata->dev)->irq; } > > -static int st_sensors_i2c_read_byte(struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, u8 *res_byte) > -{ > - int err; > - > - err = i2c_smbus_read_byte_data(to_i2c_client(dev), reg_addr); > - if (err < 0) > - goto st_accel_i2c_read_byte_error; > - > - *res_byte = err & 0xff; > - > -st_accel_i2c_read_byte_error: > - return err < 0 ? err : 0; > -} > - > -static int st_sensors_i2c_read_multiple_byte( > - struct st_sensor_transfer_buffer *tb, struct device *dev, > - u8 reg_addr, int len, u8 *data, bool multiread_bit) > -{ > - if (multiread_bit) > - reg_addr |= ST_SENSORS_I2C_MULTIREAD; > - > - return i2c_smbus_read_i2c_block_data_or_emulated(to_i2c_client(dev), > - reg_addr, len, data); > -} > - > -static int st_sensors_i2c_write_byte(struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, u8 data) > -{ > - return i2c_smbus_write_byte_data(to_i2c_client(dev), reg_addr, data); > -} > +static const struct regmap_config st_sensors_i2c_regmap_config = { > + .reg_bits = 8, > + .val_bits = 8, > +}; > > -static const struct st_sensor_transfer_function st_sensors_tf_i2c = { > - .read_byte = st_sensors_i2c_read_byte, > - .write_byte = st_sensors_i2c_write_byte, > - .read_multiple_byte = st_sensors_i2c_read_multiple_byte, > +static const struct regmap_config st_sensors_i2c_regmap_multiread_bit_config = { > + .reg_bits = 8, > + .val_bits = 8, > + .read_flag_mask = ST_SENSORS_I2C_MULTIREAD, > }; > > -void st_sensors_i2c_configure(struct iio_dev *indio_dev, > - struct i2c_client *client, struct st_sensor_data *sdata) > +/* > + * st_sensors_i2c_configure() - configure I2C interface > + * @indio_dev: IIO device reference. > + * @client: i2c client reference. > + * > + * Return: 0 on success, else a negative error code. > + */ > +int st_sensors_i2c_configure(struct iio_dev *indio_dev, > + struct i2c_client *client) > { > + struct st_sensor_data *sdata = iio_priv(indio_dev); > + const struct regmap_config *config; > + > + if (sdata->sensor_settings->multi_read_bit) > + config = &st_sensors_i2c_regmap_multiread_bit_config; > + else > + config = &st_sensors_i2c_regmap_config; > + > + sdata->regmap = devm_regmap_init_i2c(client, config); > + if (IS_ERR(sdata->regmap)) { > + dev_err(&client->dev, "Failed to register i2c regmap (%d)\n", > + (int)PTR_ERR(sdata->regmap)); > + return PTR_ERR(sdata->regmap); > + } > + > i2c_set_clientdata(client, indio_dev); > > indio_dev->dev.parent = &client->dev; > indio_dev->name = client->name; > > sdata->dev = &client->dev; > - sdata->tf = &st_sensors_tf_i2c; > sdata->get_irq_data_ready = st_sensors_i2c_get_irq; > + > + return 0; > } > EXPORT_SYMBOL(st_sensors_i2c_configure); > > diff --git a/drivers/iio/common/st_sensors/st_sensors_spi.c > b/drivers/iio/common/st_sensors/st_sensors_spi.c > index a57cd648975c..9c0661a283d0 100644 > --- a/drivers/iio/common/st_sensors/st_sensors_spi.c > +++ b/drivers/iio/common/st_sensors/st_sensors_spi.c > @@ -11,12 +11,12 @@ > #include <linux/module.h> > #include <linux/slab.h> > #include <linux/iio/iio.h> > +#include <linux/regmap.h> > > #include <linux/iio/common/st_sensors_spi.h> > - > +#include "st_sensors_core.h" > > #define ST_SENSORS_SPI_MULTIREAD 0xc0 > -#define ST_SENSORS_SPI_READ 0x80 > > static unsigned int st_sensors_spi_get_irq(struct iio_dev *indio_dev) > { @@ -25,81 +25,15 @@ static unsigned int > st_sensors_spi_get_irq(struct iio_dev *indio_dev) > return to_spi_device(sdata->dev)->irq; } > > -static int st_sensors_spi_read(struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, int len, u8 *data, bool multiread_bit) > -{ > - int err; > - > - struct spi_transfer xfers[] = { > - { > - .tx_buf = tb->tx_buf, > - .bits_per_word = 8, > - .len = 1, > - }, > - { > - .rx_buf = tb->rx_buf, > - .bits_per_word = 8, > - .len = len, > - } > - }; > - > - mutex_lock(&tb->buf_lock); > - if ((multiread_bit) && (len > 1)) > - tb->tx_buf[0] = reg_addr | ST_SENSORS_SPI_MULTIREAD; > - else > - tb->tx_buf[0] = reg_addr | ST_SENSORS_SPI_READ; > - > - err = spi_sync_transfer(to_spi_device(dev), xfers, ARRAY_SIZE(xfers)); > - if (err) > - goto acc_spi_read_error; > - > - memcpy(data, tb->rx_buf, len); > - mutex_unlock(&tb->buf_lock); > - return len; > - > -acc_spi_read_error: > - mutex_unlock(&tb->buf_lock); > - return err; > -} > - > -static int st_sensors_spi_read_byte(struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, u8 *res_byte) > -{ > - return st_sensors_spi_read(tb, dev, reg_addr, 1, res_byte, false); > -} > - > -static int st_sensors_spi_read_multiple_byte( > - struct st_sensor_transfer_buffer *tb, struct device *dev, > - u8 reg_addr, int len, u8 *data, bool multiread_bit) > -{ > - return st_sensors_spi_read(tb, dev, reg_addr, len, data, multiread_bit); > -} > - > -static int st_sensors_spi_write_byte(struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, u8 data) > -{ > - int err; > - > - struct spi_transfer xfers = { > - .tx_buf = tb->tx_buf, > - .bits_per_word = 8, > - .len = 2, > - }; > - > - mutex_lock(&tb->buf_lock); > - tb->tx_buf[0] = reg_addr; > - tb->tx_buf[1] = data; > - > - err = spi_sync_transfer(to_spi_device(dev), &xfers, 1); > - mutex_unlock(&tb->buf_lock); > - > - return err; > -} > +static const struct regmap_config st_sensors_spi_regmap_config = { > + .reg_bits = 8, > + .val_bits = 8, > +}; > > -static const struct st_sensor_transfer_function st_sensors_tf_spi = { > - .read_byte = st_sensors_spi_read_byte, > - .write_byte = st_sensors_spi_write_byte, > - .read_multiple_byte = st_sensors_spi_read_multiple_byte, > +static const struct regmap_config st_sensors_spi_regmap_multiread_bit_config = { > + .reg_bits = 8, > + .val_bits = 8, > + .read_flag_mask = ST_SENSORS_SPI_MULTIREAD, > }; > > /* > @@ -155,6 +89,7 @@ int st_sensors_spi_configure(struct iio_dev *indio_dev, > struct spi_device *spi) > { > struct st_sensor_data *sdata = iio_priv(indio_dev); > + const struct regmap_config *config; > int err; > > if (st_sensors_is_spi_3_wire(spi)) { @@ -164,13 +99,24 @@ int > st_sensors_spi_configure(struct iio_dev *indio_dev, > return err; > } > > + if (sdata->sensor_settings->multi_read_bit) > + config = &st_sensors_spi_regmap_multiread_bit_config; > + else > + config = &st_sensors_spi_regmap_config; > + > + sdata->regmap = devm_regmap_init_spi(spi, config); > + if (IS_ERR(sdata->regmap)) { > + dev_err(&spi->dev, "Failed to register spi regmap (%d)\n", > + (int)PTR_ERR(sdata->regmap)); > + return PTR_ERR(sdata->regmap); > + } > + > spi_set_drvdata(spi, indio_dev); > > indio_dev->dev.parent = &spi->dev; > indio_dev->name = spi->modalias; > > sdata->dev = &spi->dev; > - sdata->tf = &st_sensors_tf_spi; > sdata->get_irq_data_ready = st_sensors_spi_get_irq; > > return 0; > diff --git a/drivers/iio/common/st_sensors/st_sensors_trigger.c > b/drivers/iio/common/st_sensors/st_sensors_trigger.c > index 630c8cb35e8b..bed7b8682b17 100644 > --- a/drivers/iio/common/st_sensors/st_sensors_trigger.c > +++ b/drivers/iio/common/st_sensors/st_sensors_trigger.c > @@ -13,6 +13,7 @@ > #include <linux/iio/iio.h> > #include <linux/iio/trigger.h> > #include <linux/interrupt.h> > +#include <linux/regmap.h> > #include <linux/iio/common/st_sensors.h> #include > "st_sensors_core.h" > > @@ -26,8 +27,7 @@ > static int st_sensors_new_samples_available(struct iio_dev *indio_dev, > struct st_sensor_data *sdata) { > - u8 status; > - int ret; > + int ret, status; > > /* How would I know if I can't check it? */ > if (!sdata->sensor_settings->drdy_irq.stat_drdy.addr) > @@ -37,9 +37,9 @@ static int st_sensors_new_samples_available(struct iio_dev *indio_dev, > if (!indio_dev->active_scan_mask) > return 0; > > - ret = sdata->tf->read_byte(&sdata->tb, sdata->dev, > - sdata->sensor_settings->drdy_irq.stat_drdy.addr, > - &status); > + ret = regmap_read(sdata->regmap, > + sdata->sensor_settings->drdy_irq.stat_drdy.addr, > + &status); > if (ret < 0) { > dev_err(sdata->dev, > "error checking samples available\n"); diff --git > a/drivers/iio/gyro/st_gyro_buffer.c > b/drivers/iio/gyro/st_gyro_buffer.c > index 6e362f735e92..21360681d4dd 100644 > --- a/drivers/iio/gyro/st_gyro_buffer.c > +++ b/drivers/iio/gyro/st_gyro_buffer.c > @@ -39,7 +39,8 @@ static int st_gyro_buffer_postenable(struct iio_dev *indio_dev) > int err; > struct st_sensor_data *gdata = iio_priv(indio_dev); > > - gdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); > + gdata->buffer_data = kmalloc(indio_dev->scan_bytes, > + GFP_DMA | GFP_KERNEL); > if (gdata->buffer_data == NULL) { > err = -ENOMEM; > goto allocate_memory_error; > diff --git a/drivers/iio/gyro/st_gyro_core.c > b/drivers/iio/gyro/st_gyro_core.c index 4b87e79aa744..02e42c945181 > 100644 > --- a/drivers/iio/gyro/st_gyro_core.c > +++ b/drivers/iio/gyro/st_gyro_core.c > @@ -12,7 +12,6 @@ > #include <linux/slab.h> > #include <linux/errno.h> > #include <linux/types.h> > -#include <linux/mutex.h> > #include <linux/interrupt.h> > #include <linux/i2c.h> > #include <linux/gpio.h> > @@ -394,7 +393,6 @@ int st_gyro_common_probe(struct iio_dev > *indio_dev) > > indio_dev->modes = INDIO_DIRECT_MODE; > indio_dev->info = &gyro_info; > - mutex_init(&gdata->tb.buf_lock); > > err = st_sensors_power_enable(indio_dev); > if (err) > @@ -405,7 +403,6 @@ int st_gyro_common_probe(struct iio_dev *indio_dev) > goto st_gyro_power_off; > > gdata->num_data_channels = ST_GYRO_NUMBER_DATA_CHANNELS; > - gdata->multiread_bit = gdata->sensor_settings->multi_read_bit; > indio_dev->channels = gdata->sensor_settings->ch; > indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; > > diff --git a/drivers/iio/gyro/st_gyro_i2c.c > b/drivers/iio/gyro/st_gyro_i2c.c index fa71e94b76f4..05a1a0874bd5 > 100644 > --- a/drivers/iio/gyro/st_gyro_i2c.c > +++ b/drivers/iio/gyro/st_gyro_i2c.c > @@ -87,7 +87,9 @@ static int st_gyro_i2c_probe(struct i2c_client *client, > gdata = iio_priv(indio_dev); > gdata->sensor_settings = (struct st_sensor_settings *)settings; > > - st_sensors_i2c_configure(indio_dev, client, gdata); > + err = st_sensors_i2c_configure(indio_dev, client); > + if (err < 0) > + return err; > > err = st_gyro_common_probe(indio_dev); > if (err < 0) > diff --git a/drivers/iio/magnetometer/st_magn_buffer.c > b/drivers/iio/magnetometer/st_magn_buffer.c > index 11d7806655bc..9dba93539a99 100644 > --- a/drivers/iio/magnetometer/st_magn_buffer.c > +++ b/drivers/iio/magnetometer/st_magn_buffer.c > @@ -34,7 +34,8 @@ static int st_magn_buffer_postenable(struct iio_dev *indio_dev) > int err; > struct st_sensor_data *mdata = iio_priv(indio_dev); > > - mdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); > + mdata->buffer_data = kmalloc(indio_dev->scan_bytes, > + GFP_DMA | GFP_KERNEL); > if (mdata->buffer_data == NULL) { > err = -ENOMEM; > goto allocate_memory_error; > diff --git a/drivers/iio/magnetometer/st_magn_core.c > b/drivers/iio/magnetometer/st_magn_core.c > index 3f313aefece6..804353a483c7 100644 > --- a/drivers/iio/magnetometer/st_magn_core.c > +++ b/drivers/iio/magnetometer/st_magn_core.c > @@ -12,7 +12,6 @@ > #include <linux/slab.h> > #include <linux/errno.h> > #include <linux/types.h> > -#include <linux/mutex.h> > #include <linux/interrupt.h> > #include <linux/i2c.h> > #include <linux/gpio.h> > @@ -496,7 +495,6 @@ int st_magn_common_probe(struct iio_dev > *indio_dev) > > indio_dev->modes = INDIO_DIRECT_MODE; > indio_dev->info = &magn_info; > - mutex_init(&mdata->tb.buf_lock); > > err = st_sensors_power_enable(indio_dev); > if (err) > @@ -507,7 +505,6 @@ int st_magn_common_probe(struct iio_dev *indio_dev) > goto st_magn_power_off; > > mdata->num_data_channels = ST_MAGN_NUMBER_DATA_CHANNELS; > - mdata->multiread_bit = mdata->sensor_settings->multi_read_bit; > indio_dev->channels = mdata->sensor_settings->ch; > indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; > > diff --git a/drivers/iio/magnetometer/st_magn_i2c.c > b/drivers/iio/magnetometer/st_magn_i2c.c > index d5d565639bed..fdba480a12be 100644 > --- a/drivers/iio/magnetometer/st_magn_i2c.c > +++ b/drivers/iio/magnetometer/st_magn_i2c.c > @@ -79,7 +79,9 @@ static int st_magn_i2c_probe(struct i2c_client *client, > mdata = iio_priv(indio_dev); > mdata->sensor_settings = (struct st_sensor_settings *)settings; > > - st_sensors_i2c_configure(indio_dev, client, mdata); > + err = st_sensors_i2c_configure(indio_dev, client); > + if (err < 0) > + return err; > > err = st_magn_common_probe(indio_dev); > if (err < 0) > diff --git a/drivers/iio/pressure/st_pressure_buffer.c > b/drivers/iio/pressure/st_pressure_buffer.c > index 4566e08a64a1..f21b630abaa0 100644 > --- a/drivers/iio/pressure/st_pressure_buffer.c > +++ b/drivers/iio/pressure/st_pressure_buffer.c > @@ -39,7 +39,8 @@ static int st_press_buffer_postenable(struct iio_dev *indio_dev) > int err; > struct st_sensor_data *press_data = iio_priv(indio_dev); > > - press_data->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); > + press_data->buffer_data = kmalloc(indio_dev->scan_bytes, > + GFP_DMA | GFP_KERNEL); > if (press_data->buffer_data == NULL) { > err = -ENOMEM; > goto allocate_memory_error; > diff --git a/drivers/iio/pressure/st_pressure_core.c > b/drivers/iio/pressure/st_pressure_core.c > index a783fc075c26..9ef92a501286 100644 > --- a/drivers/iio/pressure/st_pressure_core.c > +++ b/drivers/iio/pressure/st_pressure_core.c > @@ -12,7 +12,6 @@ > #include <linux/slab.h> > #include <linux/errno.h> > #include <linux/types.h> > -#include <linux/mutex.h> > #include <linux/interrupt.h> > #include <linux/i2c.h> > #include <linux/gpio.h> > @@ -692,7 +691,6 @@ int st_press_common_probe(struct iio_dev > *indio_dev) > > indio_dev->modes = INDIO_DIRECT_MODE; > indio_dev->info = &press_info; > - mutex_init(&press_data->tb.buf_lock); > > err = st_sensors_power_enable(indio_dev); > if (err) > @@ -709,7 +707,6 @@ int st_press_common_probe(struct iio_dev *indio_dev) > * element. > */ > press_data->num_data_channels = press_data->sensor_settings->num_ch - 1; > - press_data->multiread_bit = press_data->sensor_settings->multi_read_bit; > indio_dev->channels = press_data->sensor_settings->ch; > indio_dev->num_channels = press_data->sensor_settings->num_ch; > > diff --git a/drivers/iio/pressure/st_pressure_i2c.c > b/drivers/iio/pressure/st_pressure_i2c.c > index 466e7dde5eae..71d2ed6b4948 100644 > --- a/drivers/iio/pressure/st_pressure_i2c.c > +++ b/drivers/iio/pressure/st_pressure_i2c.c > @@ -112,7 +112,9 @@ static int st_press_i2c_probe(struct i2c_client *client, > press_data = iio_priv(indio_dev); > press_data->sensor_settings = (struct st_sensor_settings *)settings; > > - st_sensors_i2c_configure(indio_dev, client, press_data); > + ret = st_sensors_i2c_configure(indio_dev, client); > + if (ret < 0) > + return ret; > > ret = st_press_common_probe(indio_dev); > if (ret < 0) > diff --git a/include/linux/iio/common/st_sensors.h > b/include/linux/iio/common/st_sensors.h > index 566b955e2980..28fc1f9fa7d5 100644 > --- a/include/linux/iio/common/st_sensors.h > +++ b/include/linux/iio/common/st_sensors.h > @@ -16,6 +16,7 @@ > #include <linux/iio/trigger.h> > #include <linux/bitops.h> > #include <linux/regulator/consumer.h> > +#include <linux/regmap.h> > > #include <linux/platform_data/st_sensors_pdata.h> > > @@ -169,36 +170,6 @@ struct st_sensor_data_ready_irq { > } ig1; > }; > > -/** > - * struct st_sensor_transfer_buffer - ST sensor device I/O buffer > - * @buf_lock: Mutex to protect rx and tx buffers. > - * @tx_buf: Buffer used by SPI transfer function to send data to the sensors. > - * This buffer is used to avoid DMA not-aligned issue. > - * @rx_buf: Buffer used by SPI transfer to receive data from sensors. > - * This buffer is used to avoid DMA not-aligned issue. > - */ > -struct st_sensor_transfer_buffer { > - struct mutex buf_lock; > - u8 rx_buf[ST_SENSORS_RX_MAX_LENGTH]; > - u8 tx_buf[ST_SENSORS_TX_MAX_LENGTH] ____cacheline_aligned; > -}; > - > -/** > - * struct st_sensor_transfer_function - ST sensor device I/O function > - * @read_byte: Function used to read one byte. > - * @write_byte: Function used to write one byte. > - * @read_multiple_byte: Function used to read multiple byte. > - */ > -struct st_sensor_transfer_function { > - int (*read_byte) (struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, u8 *res_byte); > - int (*write_byte) (struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, u8 data); > - int (*read_multiple_byte) (struct st_sensor_transfer_buffer *tb, > - struct device *dev, u8 reg_addr, int len, u8 *data, > - bool multiread_bit); > -}; > - > /** > * struct st_sensor_settings - ST specific sensor settings > * @wai: Contents of WhoAmI register. > @@ -242,16 +213,14 @@ struct st_sensor_settings { > * @current_fullscale: Maximum range of measure by the sensor. > * @vdd: Pointer to sensor's Vdd power supply > * @vdd_io: Pointer to sensor's Vdd-IO power supply > + * @regmap: Pointer to specific sensor regmap configuration. > * @enabled: Status of the sensor (false->off, true->on). > - * @multiread_bit: Use or not particular bit for [I2C/SPI] multiread. > * @buffer_data: Data used by buffer part. > * @odr: Output data rate of the sensor [Hz]. > * num_data_channels: Number of data channels used in buffer. > * @drdy_int_pin: Redirect DRDY on pin 1 (1) or pin 2 (2). > * @int_pin_open_drain: Set the interrupt/DRDY to open drain. > * @get_irq_data_ready: Function to get the IRQ used for data ready signal. > - * @tf: Transfer function structure used by I/O operations. > - * @tb: Transfer buffers and mutex used by I/O operations. > * @edge_irq: the IRQ triggers on edges and need special handling. > * @hw_irq_trigger: if we're using the hardware interrupt on the sensor. > * @hw_timestamp: Latest timestamp from the interrupt handler, when in use. > @@ -264,9 +233,9 @@ struct st_sensor_data { > struct st_sensor_fullscale_avl *current_fullscale; > struct regulator *vdd; > struct regulator *vdd_io; > + struct regmap *regmap; > > bool enabled; > - bool multiread_bit; > > char *buffer_data; > > @@ -278,9 +247,6 @@ struct st_sensor_data { > > unsigned int (*get_irq_data_ready) (struct iio_dev *indio_dev); > > - const struct st_sensor_transfer_function *tf; > - struct st_sensor_transfer_buffer tb; > - > bool edge_irq; > bool hw_irq_trigger; > s64 hw_timestamp; > diff --git a/include/linux/iio/common/st_sensors_i2c.h > b/include/linux/iio/common/st_sensors_i2c.h > index 5ada89944698..01e424e2af4f 100644 > --- a/include/linux/iio/common/st_sensors_i2c.h > +++ b/include/linux/iio/common/st_sensors_i2c.h > @@ -14,8 +14,8 @@ > #include <linux/iio/common/st_sensors.h> #include <linux/of.h> > > -void st_sensors_i2c_configure(struct iio_dev *indio_dev, > - struct i2c_client *client, struct st_sensor_data *sdata); > +int st_sensors_i2c_configure(struct iio_dev *indio_dev, > + struct i2c_client *client); > > #ifdef CONFIG_ACPI > int st_sensors_match_acpi_device(struct device *dev);
diff --git a/drivers/iio/accel/st_accel_buffer.c b/drivers/iio/accel/st_accel_buffer.c index 0205c0167cdd..05f9aea431e2 100644 --- a/drivers/iio/accel/st_accel_buffer.c +++ b/drivers/iio/accel/st_accel_buffer.c @@ -39,7 +39,8 @@ static int st_accel_buffer_postenable(struct iio_dev *indio_dev) int err; struct st_sensor_data *adata = iio_priv(indio_dev); - adata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); + adata->buffer_data = kmalloc(indio_dev->scan_bytes, + GFP_DMA | GFP_KERNEL); if (adata->buffer_data == NULL) { err = -ENOMEM; goto allocate_memory_error; diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c index 630909702a19..0b17004cb12e 100644 --- a/drivers/iio/accel/st_accel_core.c +++ b/drivers/iio/accel/st_accel_core.c @@ -13,7 +13,6 @@ #include <linux/acpi.h> #include <linux/errno.h> #include <linux/types.h> -#include <linux/mutex.h> #include <linux/interrupt.h> #include <linux/i2c.h> #include <linux/gpio.h> @@ -1177,7 +1176,6 @@ int st_accel_common_probe(struct iio_dev *indio_dev) indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &accel_info; - mutex_init(&adata->tb.buf_lock); err = st_sensors_power_enable(indio_dev); if (err) @@ -1188,7 +1186,6 @@ int st_accel_common_probe(struct iio_dev *indio_dev) goto st_accel_power_off; adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS; - adata->multiread_bit = adata->sensor_settings->multi_read_bit; indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; channels_size = indio_dev->num_channels * sizeof(struct iio_chan_spec); diff --git a/drivers/iio/accel/st_accel_i2c.c b/drivers/iio/accel/st_accel_i2c.c index a92cf776031e..50fa0fc32baa 100644 --- a/drivers/iio/accel/st_accel_i2c.c +++ b/drivers/iio/accel/st_accel_i2c.c @@ -174,7 +174,9 @@ static int st_accel_i2c_probe(struct i2c_client *client) adata = iio_priv(indio_dev); adata->sensor_settings = (struct st_sensor_settings *)settings; - st_sensors_i2c_configure(indio_dev, client, adata); + ret = st_sensors_i2c_configure(indio_dev, client); + if (ret < 0) + return ret; ret = st_accel_common_probe(indio_dev); if (ret < 0) diff --git a/drivers/iio/common/st_sensors/st_sensors_buffer.c b/drivers/iio/common/st_sensors/st_sensors_buffer.c index 4a68669dc555..eee30130ae23 100644 --- a/drivers/iio/common/st_sensors/st_sensors_buffer.c +++ b/drivers/iio/common/st_sensors/st_sensors_buffer.c @@ -17,15 +17,16 @@ #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> #include <linux/irqreturn.h> +#include <linux/regmap.h> #include <linux/iio/common/st_sensors.h> static int st_sensors_get_buffer_element(struct iio_dev *indio_dev, u8 *buf) { - int i; struct st_sensor_data *sdata = iio_priv(indio_dev); unsigned int num_data_channels = sdata->num_data_channels; + int i; for_each_set_bit(i, indio_dev->active_scan_mask, num_data_channels) { const struct iio_chan_spec *channel = &indio_dev->channels[i]; @@ -36,11 +37,8 @@ static int st_sensors_get_buffer_element(struct iio_dev *indio_dev, u8 *buf) channel->scan_type.storagebits >> 3; buf = PTR_ALIGN(buf, storage_bytes); - if (sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev, - channel->address, - bytes_to_read, buf, - sdata->multiread_bit) < - bytes_to_read) + if (regmap_bulk_read(sdata->regmap, channel->address, + buf, bytes_to_read) < 0) return -EIO; /* Advance the buffer pointer */ diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c index 40977d2ee400..4a3064fb6cd9 100644 --- a/drivers/iio/common/st_sensors/st_sensors_core.c +++ b/drivers/iio/common/st_sensors/st_sensors_core.c @@ -15,6 +15,7 @@ #include <linux/regulator/consumer.h> #include <linux/of.h> #include <linux/of_device.h> +#include <linux/regmap.h> #include <asm/unaligned.h> #include <linux/iio/common/st_sensors.h> @@ -28,19 +29,10 @@ static inline u32 st_sensors_get_unaligned_le24(const u8 *p) int st_sensors_write_data_with_mask(struct iio_dev *indio_dev, u8 reg_addr, u8 mask, u8 data) { - int err; - u8 new_data; struct st_sensor_data *sdata = iio_priv(indio_dev); - err = sdata->tf->read_byte(&sdata->tb, sdata->dev, reg_addr, &new_data); - if (err < 0) - goto st_sensors_write_data_with_mask_error; - - new_data = ((new_data & (~mask)) | ((data << __ffs(mask)) & mask)); - err = sdata->tf->write_byte(&sdata->tb, sdata->dev, reg_addr, new_data); - -st_sensors_write_data_with_mask_error: - return err; + return regmap_update_bits(sdata->regmap, + reg_addr, mask, data << __ffs(mask)); } int st_sensors_debugfs_reg_access(struct iio_dev *indio_dev, @@ -48,19 +40,15 @@ int st_sensors_debugfs_reg_access(struct iio_dev *indio_dev, unsigned *readval) { struct st_sensor_data *sdata = iio_priv(indio_dev); - u8 readdata; int err; if (!readval) - return sdata->tf->write_byte(&sdata->tb, sdata->dev, - (u8)reg, (u8)writeval); + return regmap_write(sdata->regmap, reg, writeval); - err = sdata->tf->read_byte(&sdata->tb, sdata->dev, (u8)reg, &readdata); + err = regmap_read(sdata->regmap, reg, readval); if (err < 0) return err; - *readval = (unsigned)readdata; - return 0; } EXPORT_SYMBOL(st_sensors_debugfs_reg_access); @@ -545,7 +533,7 @@ int st_sensors_set_fullscale_by_gain(struct iio_dev *indio_dev, int scale) EXPORT_SYMBOL(st_sensors_set_fullscale_by_gain); static int st_sensors_read_axis_data(struct iio_dev *indio_dev, - struct iio_chan_spec const *ch, int *data) + struct iio_chan_spec const *ch, int *data) { int err; u8 *outdata; @@ -554,13 +542,12 @@ static int st_sensors_read_axis_data(struct iio_dev *indio_dev, byte_for_channel = DIV_ROUND_UP(ch->scan_type.realbits + ch->scan_type.shift, 8); - outdata = kmalloc(byte_for_channel, GFP_KERNEL); + outdata = kmalloc(byte_for_channel, GFP_DMA | GFP_KERNEL); if (!outdata) return -ENOMEM; - err = sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev, - ch->address, byte_for_channel, - outdata, sdata->multiread_bit); + err = regmap_bulk_read(sdata->regmap, ch->address, + outdata, byte_for_channel); if (err < 0) goto st_sensors_free_memory; @@ -645,13 +632,11 @@ EXPORT_SYMBOL(st_sensors_get_settings_index); int st_sensors_verify_id(struct iio_dev *indio_dev) { struct st_sensor_data *sdata = iio_priv(indio_dev); - int err; - u8 wai; + int wai, err; - if (settings->wai_addr) { - err = sdata->tf->read_byte(&sdata->tb, sdata->dev, - sdata->sensor_settings->wai_addr, - &wai); + if (sdata->sensor_settings->wai_addr) { + err = regmap_read(sdata->regmap, + sdata->sensor_settings->wai_addr, &wai); if (err < 0) { dev_err(&indio_dev->dev, "failed to read Who-Am-I register.\n"); diff --git a/drivers/iio/common/st_sensors/st_sensors_i2c.c b/drivers/iio/common/st_sensors/st_sensors_i2c.c index b1c9812407e7..9240625534df 100644 --- a/drivers/iio/common/st_sensors/st_sensors_i2c.c +++ b/drivers/iio/common/st_sensors/st_sensors_i2c.c @@ -13,6 +13,7 @@ #include <linux/iio/iio.h> #include <linux/of_device.h> #include <linux/acpi.h> +#include <linux/regmap.h> #include <linux/iio/common/st_sensors_i2c.h> @@ -26,55 +27,51 @@ static unsigned int st_sensors_i2c_get_irq(struct iio_dev *indio_dev) return to_i2c_client(sdata->dev)->irq; } -static int st_sensors_i2c_read_byte(struct st_sensor_transfer_buffer *tb, - struct device *dev, u8 reg_addr, u8 *res_byte) -{ - int err; - - err = i2c_smbus_read_byte_data(to_i2c_client(dev), reg_addr); - if (err < 0) - goto st_accel_i2c_read_byte_error; - - *res_byte = err & 0xff; - -st_accel_i2c_read_byte_error: - return err < 0 ? err : 0; -} - -static int st_sensors_i2c_read_multiple_byte( - struct st_sensor_transfer_buffer *tb, struct device *dev, - u8 reg_addr, int len, u8 *data, bool multiread_bit) -{ - if (multiread_bit) - reg_addr |= ST_SENSORS_I2C_MULTIREAD; - - return i2c_smbus_read_i2c_block_data_or_emulated(to_i2c_client(dev), - reg_addr, len, data); -} - -static int st_sensors_i2c_write_byte(struct st_sensor_transfer_buffer *tb, - struct device *dev, u8 reg_addr, u8 data) -{ - return i2c_smbus_write_byte_data(to_i2c_client(dev), reg_addr, data); -} +static const struct regmap_config st_sensors_i2c_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; -static const struct st_sensor_transfer_function st_sensors_tf_i2c = { - .read_byte = st_sensors_i2c_read_byte, - .write_byte = st_sensors_i2c_write_byte, - .read_multiple_byte = st_sensors_i2c_read_multiple_byte, +static const struct regmap_config st_sensors_i2c_regmap_multiread_bit_config = { + .reg_bits = 8, + .val_bits = 8, + .read_flag_mask = ST_SENSORS_I2C_MULTIREAD, }; -void st_sensors_i2c_configure(struct iio_dev *indio_dev, - struct i2c_client *client, struct st_sensor_data *sdata) +/* + * st_sensors_i2c_configure() - configure I2C interface + * @indio_dev: IIO device reference. + * @client: i2c client reference. + * + * Return: 0 on success, else a negative error code. + */ +int st_sensors_i2c_configure(struct iio_dev *indio_dev, + struct i2c_client *client) { + struct st_sensor_data *sdata = iio_priv(indio_dev); + const struct regmap_config *config; + + if (sdata->sensor_settings->multi_read_bit) + config = &st_sensors_i2c_regmap_multiread_bit_config; + else + config = &st_sensors_i2c_regmap_config; + + sdata->regmap = devm_regmap_init_i2c(client, config); + if (IS_ERR(sdata->regmap)) { + dev_err(&client->dev, "Failed to register i2c regmap (%d)\n", + (int)PTR_ERR(sdata->regmap)); + return PTR_ERR(sdata->regmap); + } + i2c_set_clientdata(client, indio_dev); indio_dev->dev.parent = &client->dev; indio_dev->name = client->name; sdata->dev = &client->dev; - sdata->tf = &st_sensors_tf_i2c; sdata->get_irq_data_ready = st_sensors_i2c_get_irq; + + return 0; } EXPORT_SYMBOL(st_sensors_i2c_configure); diff --git a/drivers/iio/common/st_sensors/st_sensors_spi.c b/drivers/iio/common/st_sensors/st_sensors_spi.c index a57cd648975c..9c0661a283d0 100644 --- a/drivers/iio/common/st_sensors/st_sensors_spi.c +++ b/drivers/iio/common/st_sensors/st_sensors_spi.c @@ -11,12 +11,12 @@ #include <linux/module.h> #include <linux/slab.h> #include <linux/iio/iio.h> +#include <linux/regmap.h> #include <linux/iio/common/st_sensors_spi.h> - +#include "st_sensors_core.h" #define ST_SENSORS_SPI_MULTIREAD 0xc0 -#define ST_SENSORS_SPI_READ 0x80 static unsigned int st_sensors_spi_get_irq(struct iio_dev *indio_dev) { @@ -25,81 +25,15 @@ static unsigned int st_sensors_spi_get_irq(struct iio_dev *indio_dev) return to_spi_device(sdata->dev)->irq; } -static int st_sensors_spi_read(struct st_sensor_transfer_buffer *tb, - struct device *dev, u8 reg_addr, int len, u8 *data, bool multiread_bit) -{ - int err; - - struct spi_transfer xfers[] = { - { - .tx_buf = tb->tx_buf, - .bits_per_word = 8, - .len = 1, - }, - { - .rx_buf = tb->rx_buf, - .bits_per_word = 8, - .len = len, - } - }; - - mutex_lock(&tb->buf_lock); - if ((multiread_bit) && (len > 1)) - tb->tx_buf[0] = reg_addr | ST_SENSORS_SPI_MULTIREAD; - else - tb->tx_buf[0] = reg_addr | ST_SENSORS_SPI_READ; - - err = spi_sync_transfer(to_spi_device(dev), xfers, ARRAY_SIZE(xfers)); - if (err) - goto acc_spi_read_error; - - memcpy(data, tb->rx_buf, len); - mutex_unlock(&tb->buf_lock); - return len; - -acc_spi_read_error: - mutex_unlock(&tb->buf_lock); - return err; -} - -static int st_sensors_spi_read_byte(struct st_sensor_transfer_buffer *tb, - struct device *dev, u8 reg_addr, u8 *res_byte) -{ - return st_sensors_spi_read(tb, dev, reg_addr, 1, res_byte, false); -} - -static int st_sensors_spi_read_multiple_byte( - struct st_sensor_transfer_buffer *tb, struct device *dev, - u8 reg_addr, int len, u8 *data, bool multiread_bit) -{ - return st_sensors_spi_read(tb, dev, reg_addr, len, data, multiread_bit); -} - -static int st_sensors_spi_write_byte(struct st_sensor_transfer_buffer *tb, - struct device *dev, u8 reg_addr, u8 data) -{ - int err; - - struct spi_transfer xfers = { - .tx_buf = tb->tx_buf, - .bits_per_word = 8, - .len = 2, - }; - - mutex_lock(&tb->buf_lock); - tb->tx_buf[0] = reg_addr; - tb->tx_buf[1] = data; - - err = spi_sync_transfer(to_spi_device(dev), &xfers, 1); - mutex_unlock(&tb->buf_lock); - - return err; -} +static const struct regmap_config st_sensors_spi_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; -static const struct st_sensor_transfer_function st_sensors_tf_spi = { - .read_byte = st_sensors_spi_read_byte, - .write_byte = st_sensors_spi_write_byte, - .read_multiple_byte = st_sensors_spi_read_multiple_byte, +static const struct regmap_config st_sensors_spi_regmap_multiread_bit_config = { + .reg_bits = 8, + .val_bits = 8, + .read_flag_mask = ST_SENSORS_SPI_MULTIREAD, }; /* @@ -155,6 +89,7 @@ int st_sensors_spi_configure(struct iio_dev *indio_dev, struct spi_device *spi) { struct st_sensor_data *sdata = iio_priv(indio_dev); + const struct regmap_config *config; int err; if (st_sensors_is_spi_3_wire(spi)) { @@ -164,13 +99,24 @@ int st_sensors_spi_configure(struct iio_dev *indio_dev, return err; } + if (sdata->sensor_settings->multi_read_bit) + config = &st_sensors_spi_regmap_multiread_bit_config; + else + config = &st_sensors_spi_regmap_config; + + sdata->regmap = devm_regmap_init_spi(spi, config); + if (IS_ERR(sdata->regmap)) { + dev_err(&spi->dev, "Failed to register spi regmap (%d)\n", + (int)PTR_ERR(sdata->regmap)); + return PTR_ERR(sdata->regmap); + } + spi_set_drvdata(spi, indio_dev); indio_dev->dev.parent = &spi->dev; indio_dev->name = spi->modalias; sdata->dev = &spi->dev; - sdata->tf = &st_sensors_tf_spi; sdata->get_irq_data_ready = st_sensors_spi_get_irq; return 0; diff --git a/drivers/iio/common/st_sensors/st_sensors_trigger.c b/drivers/iio/common/st_sensors/st_sensors_trigger.c index 630c8cb35e8b..bed7b8682b17 100644 --- a/drivers/iio/common/st_sensors/st_sensors_trigger.c +++ b/drivers/iio/common/st_sensors/st_sensors_trigger.c @@ -13,6 +13,7 @@ #include <linux/iio/iio.h> #include <linux/iio/trigger.h> #include <linux/interrupt.h> +#include <linux/regmap.h> #include <linux/iio/common/st_sensors.h> #include "st_sensors_core.h" @@ -26,8 +27,7 @@ static int st_sensors_new_samples_available(struct iio_dev *indio_dev, struct st_sensor_data *sdata) { - u8 status; - int ret; + int ret, status; /* How would I know if I can't check it? */ if (!sdata->sensor_settings->drdy_irq.stat_drdy.addr) @@ -37,9 +37,9 @@ static int st_sensors_new_samples_available(struct iio_dev *indio_dev, if (!indio_dev->active_scan_mask) return 0; - ret = sdata->tf->read_byte(&sdata->tb, sdata->dev, - sdata->sensor_settings->drdy_irq.stat_drdy.addr, - &status); + ret = regmap_read(sdata->regmap, + sdata->sensor_settings->drdy_irq.stat_drdy.addr, + &status); if (ret < 0) { dev_err(sdata->dev, "error checking samples available\n"); diff --git a/drivers/iio/gyro/st_gyro_buffer.c b/drivers/iio/gyro/st_gyro_buffer.c index 6e362f735e92..21360681d4dd 100644 --- a/drivers/iio/gyro/st_gyro_buffer.c +++ b/drivers/iio/gyro/st_gyro_buffer.c @@ -39,7 +39,8 @@ static int st_gyro_buffer_postenable(struct iio_dev *indio_dev) int err; struct st_sensor_data *gdata = iio_priv(indio_dev); - gdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); + gdata->buffer_data = kmalloc(indio_dev->scan_bytes, + GFP_DMA | GFP_KERNEL); if (gdata->buffer_data == NULL) { err = -ENOMEM; goto allocate_memory_error; diff --git a/drivers/iio/gyro/st_gyro_core.c b/drivers/iio/gyro/st_gyro_core.c index 4b87e79aa744..02e42c945181 100644 --- a/drivers/iio/gyro/st_gyro_core.c +++ b/drivers/iio/gyro/st_gyro_core.c @@ -12,7 +12,6 @@ #include <linux/slab.h> #include <linux/errno.h> #include <linux/types.h> -#include <linux/mutex.h> #include <linux/interrupt.h> #include <linux/i2c.h> #include <linux/gpio.h> @@ -394,7 +393,6 @@ int st_gyro_common_probe(struct iio_dev *indio_dev) indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &gyro_info; - mutex_init(&gdata->tb.buf_lock); err = st_sensors_power_enable(indio_dev); if (err) @@ -405,7 +403,6 @@ int st_gyro_common_probe(struct iio_dev *indio_dev) goto st_gyro_power_off; gdata->num_data_channels = ST_GYRO_NUMBER_DATA_CHANNELS; - gdata->multiread_bit = gdata->sensor_settings->multi_read_bit; indio_dev->channels = gdata->sensor_settings->ch; indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; diff --git a/drivers/iio/gyro/st_gyro_i2c.c b/drivers/iio/gyro/st_gyro_i2c.c index fa71e94b76f4..05a1a0874bd5 100644 --- a/drivers/iio/gyro/st_gyro_i2c.c +++ b/drivers/iio/gyro/st_gyro_i2c.c @@ -87,7 +87,9 @@ static int st_gyro_i2c_probe(struct i2c_client *client, gdata = iio_priv(indio_dev); gdata->sensor_settings = (struct st_sensor_settings *)settings; - st_sensors_i2c_configure(indio_dev, client, gdata); + err = st_sensors_i2c_configure(indio_dev, client); + if (err < 0) + return err; err = st_gyro_common_probe(indio_dev); if (err < 0) diff --git a/drivers/iio/magnetometer/st_magn_buffer.c b/drivers/iio/magnetometer/st_magn_buffer.c index 11d7806655bc..9dba93539a99 100644 --- a/drivers/iio/magnetometer/st_magn_buffer.c +++ b/drivers/iio/magnetometer/st_magn_buffer.c @@ -34,7 +34,8 @@ static int st_magn_buffer_postenable(struct iio_dev *indio_dev) int err; struct st_sensor_data *mdata = iio_priv(indio_dev); - mdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); + mdata->buffer_data = kmalloc(indio_dev->scan_bytes, + GFP_DMA | GFP_KERNEL); if (mdata->buffer_data == NULL) { err = -ENOMEM; goto allocate_memory_error; diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c index 3f313aefece6..804353a483c7 100644 --- a/drivers/iio/magnetometer/st_magn_core.c +++ b/drivers/iio/magnetometer/st_magn_core.c @@ -12,7 +12,6 @@ #include <linux/slab.h> #include <linux/errno.h> #include <linux/types.h> -#include <linux/mutex.h> #include <linux/interrupt.h> #include <linux/i2c.h> #include <linux/gpio.h> @@ -496,7 +495,6 @@ int st_magn_common_probe(struct iio_dev *indio_dev) indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &magn_info; - mutex_init(&mdata->tb.buf_lock); err = st_sensors_power_enable(indio_dev); if (err) @@ -507,7 +505,6 @@ int st_magn_common_probe(struct iio_dev *indio_dev) goto st_magn_power_off; mdata->num_data_channels = ST_MAGN_NUMBER_DATA_CHANNELS; - mdata->multiread_bit = mdata->sensor_settings->multi_read_bit; indio_dev->channels = mdata->sensor_settings->ch; indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; diff --git a/drivers/iio/magnetometer/st_magn_i2c.c b/drivers/iio/magnetometer/st_magn_i2c.c index d5d565639bed..fdba480a12be 100644 --- a/drivers/iio/magnetometer/st_magn_i2c.c +++ b/drivers/iio/magnetometer/st_magn_i2c.c @@ -79,7 +79,9 @@ static int st_magn_i2c_probe(struct i2c_client *client, mdata = iio_priv(indio_dev); mdata->sensor_settings = (struct st_sensor_settings *)settings; - st_sensors_i2c_configure(indio_dev, client, mdata); + err = st_sensors_i2c_configure(indio_dev, client); + if (err < 0) + return err; err = st_magn_common_probe(indio_dev); if (err < 0) diff --git a/drivers/iio/pressure/st_pressure_buffer.c b/drivers/iio/pressure/st_pressure_buffer.c index 4566e08a64a1..f21b630abaa0 100644 --- a/drivers/iio/pressure/st_pressure_buffer.c +++ b/drivers/iio/pressure/st_pressure_buffer.c @@ -39,7 +39,8 @@ static int st_press_buffer_postenable(struct iio_dev *indio_dev) int err; struct st_sensor_data *press_data = iio_priv(indio_dev); - press_data->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); + press_data->buffer_data = kmalloc(indio_dev->scan_bytes, + GFP_DMA | GFP_KERNEL); if (press_data->buffer_data == NULL) { err = -ENOMEM; goto allocate_memory_error; diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c index a783fc075c26..9ef92a501286 100644 --- a/drivers/iio/pressure/st_pressure_core.c +++ b/drivers/iio/pressure/st_pressure_core.c @@ -12,7 +12,6 @@ #include <linux/slab.h> #include <linux/errno.h> #include <linux/types.h> -#include <linux/mutex.h> #include <linux/interrupt.h> #include <linux/i2c.h> #include <linux/gpio.h> @@ -692,7 +691,6 @@ int st_press_common_probe(struct iio_dev *indio_dev) indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &press_info; - mutex_init(&press_data->tb.buf_lock); err = st_sensors_power_enable(indio_dev); if (err) @@ -709,7 +707,6 @@ int st_press_common_probe(struct iio_dev *indio_dev) * element. */ press_data->num_data_channels = press_data->sensor_settings->num_ch - 1; - press_data->multiread_bit = press_data->sensor_settings->multi_read_bit; indio_dev->channels = press_data->sensor_settings->ch; indio_dev->num_channels = press_data->sensor_settings->num_ch; diff --git a/drivers/iio/pressure/st_pressure_i2c.c b/drivers/iio/pressure/st_pressure_i2c.c index 466e7dde5eae..71d2ed6b4948 100644 --- a/drivers/iio/pressure/st_pressure_i2c.c +++ b/drivers/iio/pressure/st_pressure_i2c.c @@ -112,7 +112,9 @@ static int st_press_i2c_probe(struct i2c_client *client, press_data = iio_priv(indio_dev); press_data->sensor_settings = (struct st_sensor_settings *)settings; - st_sensors_i2c_configure(indio_dev, client, press_data); + ret = st_sensors_i2c_configure(indio_dev, client); + if (ret < 0) + return ret; ret = st_press_common_probe(indio_dev); if (ret < 0) diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h index 566b955e2980..28fc1f9fa7d5 100644 --- a/include/linux/iio/common/st_sensors.h +++ b/include/linux/iio/common/st_sensors.h @@ -16,6 +16,7 @@ #include <linux/iio/trigger.h> #include <linux/bitops.h> #include <linux/regulator/consumer.h> +#include <linux/regmap.h> #include <linux/platform_data/st_sensors_pdata.h> @@ -169,36 +170,6 @@ struct st_sensor_data_ready_irq { } ig1; }; -/** - * struct st_sensor_transfer_buffer - ST sensor device I/O buffer - * @buf_lock: Mutex to protect rx and tx buffers. - * @tx_buf: Buffer used by SPI transfer function to send data to the sensors. - * This buffer is used to avoid DMA not-aligned issue. - * @rx_buf: Buffer used by SPI transfer to receive data from sensors. - * This buffer is used to avoid DMA not-aligned issue. - */ -struct st_sensor_transfer_buffer { - struct mutex buf_lock; - u8 rx_buf[ST_SENSORS_RX_MAX_LENGTH]; - u8 tx_buf[ST_SENSORS_TX_MAX_LENGTH] ____cacheline_aligned; -}; - -/** - * struct st_sensor_transfer_function - ST sensor device I/O function - * @read_byte: Function used to read one byte. - * @write_byte: Function used to write one byte. - * @read_multiple_byte: Function used to read multiple byte. - */ -struct st_sensor_transfer_function { - int (*read_byte) (struct st_sensor_transfer_buffer *tb, - struct device *dev, u8 reg_addr, u8 *res_byte); - int (*write_byte) (struct st_sensor_transfer_buffer *tb, - struct device *dev, u8 reg_addr, u8 data); - int (*read_multiple_byte) (struct st_sensor_transfer_buffer *tb, - struct device *dev, u8 reg_addr, int len, u8 *data, - bool multiread_bit); -}; - /** * struct st_sensor_settings - ST specific sensor settings * @wai: Contents of WhoAmI register. @@ -242,16 +213,14 @@ struct st_sensor_settings { * @current_fullscale: Maximum range of measure by the sensor. * @vdd: Pointer to sensor's Vdd power supply * @vdd_io: Pointer to sensor's Vdd-IO power supply + * @regmap: Pointer to specific sensor regmap configuration. * @enabled: Status of the sensor (false->off, true->on). - * @multiread_bit: Use or not particular bit for [I2C/SPI] multiread. * @buffer_data: Data used by buffer part. * @odr: Output data rate of the sensor [Hz]. * num_data_channels: Number of data channels used in buffer. * @drdy_int_pin: Redirect DRDY on pin 1 (1) or pin 2 (2). * @int_pin_open_drain: Set the interrupt/DRDY to open drain. * @get_irq_data_ready: Function to get the IRQ used for data ready signal. - * @tf: Transfer function structure used by I/O operations. - * @tb: Transfer buffers and mutex used by I/O operations. * @edge_irq: the IRQ triggers on edges and need special handling. * @hw_irq_trigger: if we're using the hardware interrupt on the sensor. * @hw_timestamp: Latest timestamp from the interrupt handler, when in use. @@ -264,9 +233,9 @@ struct st_sensor_data { struct st_sensor_fullscale_avl *current_fullscale; struct regulator *vdd; struct regulator *vdd_io; + struct regmap *regmap; bool enabled; - bool multiread_bit; char *buffer_data; @@ -278,9 +247,6 @@ struct st_sensor_data { unsigned int (*get_irq_data_ready) (struct iio_dev *indio_dev); - const struct st_sensor_transfer_function *tf; - struct st_sensor_transfer_buffer tb; - bool edge_irq; bool hw_irq_trigger; s64 hw_timestamp; diff --git a/include/linux/iio/common/st_sensors_i2c.h b/include/linux/iio/common/st_sensors_i2c.h index 5ada89944698..01e424e2af4f 100644 --- a/include/linux/iio/common/st_sensors_i2c.h +++ b/include/linux/iio/common/st_sensors_i2c.h @@ -14,8 +14,8 @@ #include <linux/iio/common/st_sensors.h> #include <linux/of.h> -void st_sensors_i2c_configure(struct iio_dev *indio_dev, - struct i2c_client *client, struct st_sensor_data *sdata); +int st_sensors_i2c_configure(struct iio_dev *indio_dev, + struct i2c_client *client); #ifdef CONFIG_ACPI int st_sensors_match_acpi_device(struct device *dev);
This patch is meant to replace the i2c/spi transfer functions with regmap. SPI framework requires DMA safe buffers so let's add GFP_DMA flag for memory allocation used by bulk_read functions. Signed-off-by: Denis Ciocca <denis.ciocca@st.com> --- Changes in v2: memory allocation uses GFP_DMA if buffer is used in bulk_read fix struct fields doc drivers/iio/accel/st_accel_buffer.c | 3 +- drivers/iio/accel/st_accel_core.c | 3 - drivers/iio/accel/st_accel_i2c.c | 4 +- .../iio/common/st_sensors/st_sensors_buffer.c | 10 +- .../iio/common/st_sensors/st_sensors_core.c | 41 +++---- .../iio/common/st_sensors/st_sensors_i2c.c | 73 ++++++------- .../iio/common/st_sensors/st_sensors_spi.c | 100 ++++-------------- .../common/st_sensors/st_sensors_trigger.c | 10 +- drivers/iio/gyro/st_gyro_buffer.c | 3 +- drivers/iio/gyro/st_gyro_core.c | 3 - drivers/iio/gyro/st_gyro_i2c.c | 4 +- drivers/iio/magnetometer/st_magn_buffer.c | 3 +- drivers/iio/magnetometer/st_magn_core.c | 3 - drivers/iio/magnetometer/st_magn_i2c.c | 4 +- drivers/iio/pressure/st_pressure_buffer.c | 3 +- drivers/iio/pressure/st_pressure_core.c | 3 - drivers/iio/pressure/st_pressure_i2c.c | 4 +- include/linux/iio/common/st_sensors.h | 40 +------ include/linux/iio/common/st_sensors_i2c.h | 4 +- 19 files changed, 105 insertions(+), 213 deletions(-)