| Message ID | 20200527185711.21331-3-jmaneyrol@invensense.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | iio: imu: new inv_icm42600 driver | expand |
On Wed, 27 May 2020 20:57:01 +0200 Jean-Baptiste Maneyrol <jmaneyrol@invensense.com> wrote: > Add I2C driver for InvenSense ICM-426xxx devices. > > Configure bus signal slew rates as indicated in the datasheet. > > Signed-off-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com> Looks fine to me. J > --- > .../iio/imu/inv_icm42600/inv_icm42600_i2c.c | 100 ++++++++++++++++++ > 1 file changed, 100 insertions(+) > create mode 100644 drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c > > diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c > new file mode 100644 > index 000000000000..4789cead23b3 > --- /dev/null > +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c > @@ -0,0 +1,100 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Copyright (C) 2020 InvenSense, Inc. > + */ > + > +#include <linux/kernel.h> > +#include <linux/device.h> > +#include <linux/module.h> > +#include <linux/mod_devicetable.h> > +#include <linux/i2c.h> > +#include <linux/regmap.h> > +#include <linux/property.h> > + > +#include "inv_icm42600.h" > + > +static int inv_icm42600_i2c_bus_setup(struct inv_icm42600_state *st) > +{ > + unsigned int mask, val; > + int ret; > + > + /* setup interface registers */ > + ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG6, > + INV_ICM42600_INTF_CONFIG6_MASK, > + INV_ICM42600_INTF_CONFIG6_I3C_EN); > + if (ret) > + return ret; > + > + ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG4, > + INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY, 0); > + if (ret) > + return ret; > + > + /* set slew rates for I2C and SPI */ > + mask = INV_ICM42600_DRIVE_CONFIG_I2C_MASK | > + INV_ICM42600_DRIVE_CONFIG_SPI_MASK; > + val = INV_ICM42600_DRIVE_CONFIG_I2C(INV_ICM42600_SLEW_RATE_12_36NS) | > + INV_ICM42600_DRIVE_CONFIG_SPI(INV_ICM42600_SLEW_RATE_12_36NS); > + ret = regmap_update_bits(st->map, INV_ICM42600_REG_DRIVE_CONFIG, > + mask, val); > + if (ret) > + return ret; > + > + /* disable SPI bus */ > + return regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG0, > + INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_MASK, > + INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_SPI_DIS); > +} > + > +static int inv_icm42600_probe(struct i2c_client *client) > +{ > + const void *match; > + enum inv_icm42600_chip chip; > + struct regmap *regmap; > + > + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) > + return -ENOTSUPP; > + > + match = device_get_match_data(&client->dev); > + if (!match) > + return -EINVAL; > + chip = (enum inv_icm42600_chip)match; > + > + regmap = devm_regmap_init_i2c(client, &inv_icm42600_regmap_config); > + if (IS_ERR(regmap)) > + return PTR_ERR(regmap); > + > + return inv_icm42600_core_probe(regmap, chip, inv_icm42600_i2c_bus_setup); > +} > + > +static const struct of_device_id inv_icm42600_of_matches[] = { > + { > + .compatible = "invensense,icm42600", > + .data = (void *)INV_CHIP_ICM42600, > + }, { > + .compatible = "invensense,icm42602", > + .data = (void *)INV_CHIP_ICM42602, > + }, { > + .compatible = "invensense,icm42605", > + .data = (void *)INV_CHIP_ICM42605, > + }, { > + .compatible = "invensense,icm42622", > + .data = (void *)INV_CHIP_ICM42622, > + }, > + {} > +}; > +MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches); > + > +static struct i2c_driver inv_icm42600_driver = { > + .driver = { > + .name = "inv-icm42600-i2c", > + .of_match_table = inv_icm42600_of_matches, > + .pm = &inv_icm42600_pm_ops, > + }, > + .probe_new = inv_icm42600_probe, > +}; > +module_i2c_driver(inv_icm42600_driver); > + > +MODULE_AUTHOR("InvenSense, Inc."); > +MODULE_DESCRIPTION("InvenSense ICM-426xx I2C driver"); > +MODULE_LICENSE("GPL");
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c new file mode 100644 index 000000000000..4789cead23b3 --- /dev/null +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c @@ -0,0 +1,100 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2020 InvenSense, Inc. + */ + +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/i2c.h> +#include <linux/regmap.h> +#include <linux/property.h> + +#include "inv_icm42600.h" + +static int inv_icm42600_i2c_bus_setup(struct inv_icm42600_state *st) +{ + unsigned int mask, val; + int ret; + + /* setup interface registers */ + ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG6, + INV_ICM42600_INTF_CONFIG6_MASK, + INV_ICM42600_INTF_CONFIG6_I3C_EN); + if (ret) + return ret; + + ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG4, + INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY, 0); + if (ret) + return ret; + + /* set slew rates for I2C and SPI */ + mask = INV_ICM42600_DRIVE_CONFIG_I2C_MASK | + INV_ICM42600_DRIVE_CONFIG_SPI_MASK; + val = INV_ICM42600_DRIVE_CONFIG_I2C(INV_ICM42600_SLEW_RATE_12_36NS) | + INV_ICM42600_DRIVE_CONFIG_SPI(INV_ICM42600_SLEW_RATE_12_36NS); + ret = regmap_update_bits(st->map, INV_ICM42600_REG_DRIVE_CONFIG, + mask, val); + if (ret) + return ret; + + /* disable SPI bus */ + return regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG0, + INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_MASK, + INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_SPI_DIS); +} + +static int inv_icm42600_probe(struct i2c_client *client) +{ + const void *match; + enum inv_icm42600_chip chip; + struct regmap *regmap; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) + return -ENOTSUPP; + + match = device_get_match_data(&client->dev); + if (!match) + return -EINVAL; + chip = (enum inv_icm42600_chip)match; + + regmap = devm_regmap_init_i2c(client, &inv_icm42600_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + return inv_icm42600_core_probe(regmap, chip, inv_icm42600_i2c_bus_setup); +} + +static const struct of_device_id inv_icm42600_of_matches[] = { + { + .compatible = "invensense,icm42600", + .data = (void *)INV_CHIP_ICM42600, + }, { + .compatible = "invensense,icm42602", + .data = (void *)INV_CHIP_ICM42602, + }, { + .compatible = "invensense,icm42605", + .data = (void *)INV_CHIP_ICM42605, + }, { + .compatible = "invensense,icm42622", + .data = (void *)INV_CHIP_ICM42622, + }, + {} +}; +MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches); + +static struct i2c_driver inv_icm42600_driver = { + .driver = { + .name = "inv-icm42600-i2c", + .of_match_table = inv_icm42600_of_matches, + .pm = &inv_icm42600_pm_ops, + }, + .probe_new = inv_icm42600_probe, +}; +module_i2c_driver(inv_icm42600_driver); + +MODULE_AUTHOR("InvenSense, Inc."); +MODULE_DESCRIPTION("InvenSense ICM-426xx I2C driver"); +MODULE_LICENSE("GPL");
Add I2C driver for InvenSense ICM-426xxx devices. Configure bus signal slew rates as indicated in the datasheet. Signed-off-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com> --- .../iio/imu/inv_icm42600/inv_icm42600_i2c.c | 100 ++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c