| Message ID | 20210121134434.2782405-2-robert.marko@sartura.hr (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | [v5,1/3] dt-bindings: hwmon: Add TI TPS23861 bindings | expand |
On Thu, Jan 21, 2021 at 02:44:33PM +0100, Robert Marko wrote: > Add basic monitoring support as well as port on/off control for Texas > Instruments TPS23861 PoE PSE IC. > > Signed-off-by: Robert Marko <robert.marko@sartura.hr> > Cc: Luka Perkov <luka.perkov@sartura.hr> For my reference: Reviewed-by: Guenter Roeck <linux@roeck-us.net> We'll need to wait for bindings approval. Thanks, Guenter > --- > Changes in v4: > * Add documentation > * Correct of_property_read_u32() return check > * Drop useless and incorrect debugfs return check > > Changes in v3: > * Leave only standard values in hwmon hwmon > * Drop custom sysfs entries > * Use debugfs to provide non standard debug information > * Add temperature label > * Use hwmon_in_enable to enable/disable ports > > Changes in v2: > * Convert to devm_hwmon_device_register_with_info() > * Change license > > Documentation/hwmon/index.rst | 1 + > Documentation/hwmon/tps23861.rst | 41 +++ > drivers/hwmon/Kconfig | 11 + > drivers/hwmon/Makefile | 1 + > drivers/hwmon/tps23861.c | 601 +++++++++++++++++++++++++++++++ > 5 files changed, 655 insertions(+) > create mode 100644 Documentation/hwmon/tps23861.rst > create mode 100644 drivers/hwmon/tps23861.c > > diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst > index fcb870ce6286..2c94f0b524dd 100644 > --- a/Documentation/hwmon/index.rst > +++ b/Documentation/hwmon/index.rst > @@ -178,6 +178,7 @@ Hardware Monitoring Kernel Drivers > tmp401 > tmp421 > tmp513 > + tps23861 > tps40422 > tps53679 > twl4030-madc-hwmon > diff --git a/Documentation/hwmon/tps23861.rst b/Documentation/hwmon/tps23861.rst > new file mode 100644 > index 000000000000..46d121ff3f31 > --- /dev/null > +++ b/Documentation/hwmon/tps23861.rst > @@ -0,0 +1,41 @@ > +.. SPDX-License-Identifier: GPL-2.0-only > + > +Kernel driver tps23861 > +====================== > + > +Supported chips: > + * Texas Instruments TPS23861 > + > + Prefix: 'tps23861' > + > + Datasheet: https://www.ti.com/lit/gpn/tps23861 > + > +Author: Robert Marko <robert.marko@sartura.hr> > + > +Description > +----------- > + > +This driver supports hardware monitoring for Texas Instruments TPS23861 PoE PSE. > + > +TPS23861 is a quad port IEEE802.3at PSE controller with optional I2C control > +and monitoring capabilities. > + > +TPS23861 offers three modes of operation: Auto, Semi-Auto and Manual. > + > +This driver only supports the Auto mode of operation providing monitoring > +as well as enabling/disabling the four ports. > + > +Sysfs entries > +------------- > + > +======================= ===================================================================== > +in[0-3]_input Voltage on ports [1-4] > +in[0-3]_label "Port[1-4]" > +in4_input IC input voltage > +in4_label "Input" > +temp1_input IC die temperature > +temp1_label "Die" > +curr[1-4]_input Current on ports [1-4] > +in[1-4]_label "Port[1-4]" > +in[0-3]_enable Enable/disable ports [1-4] > +======================= ===================================================================== > diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig > index 1ecf697d8d99..e2a3aeed0628 100644 > --- a/drivers/hwmon/Kconfig > +++ b/drivers/hwmon/Kconfig > @@ -1136,6 +1136,17 @@ config SENSORS_TC654 > This driver can also be built as a module. If so, the module > will be called tc654. > > +config SENSORS_TPS23861 > + tristate "Texas Instruments TPS23861 PoE PSE" > + depends on I2C > + select REGMAP_I2C > + help > + If you say yes here you get support for Texas Instruments > + TPS23861 802.3at PoE PSE chips. > + > + This driver can also be built as a module. If so, the module > + will be called tps23861. > + > config SENSORS_MENF21BMC_HWMON > tristate "MEN 14F021P00 BMC Hardware Monitoring" > depends on MFD_MENF21BMC > diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile > index 09a86c5e1d29..583ca5dbd838 100644 > --- a/drivers/hwmon/Makefile > +++ b/drivers/hwmon/Makefile > @@ -144,6 +144,7 @@ obj-$(CONFIG_SENSORS_MAX31790) += max31790.o > obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o > obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o > obj-$(CONFIG_SENSORS_TC654) += tc654.o > +obj-$(CONFIG_SENSORS_TPS23861) += tps23861.o > obj-$(CONFIG_SENSORS_MLXREG_FAN) += mlxreg-fan.o > obj-$(CONFIG_SENSORS_MENF21BMC_HWMON) += menf21bmc_hwmon.o > obj-$(CONFIG_SENSORS_MR75203) += mr75203.o > diff --git a/drivers/hwmon/tps23861.c b/drivers/hwmon/tps23861.c > new file mode 100644 > index 000000000000..c2484f15298b > --- /dev/null > +++ b/drivers/hwmon/tps23861.c > @@ -0,0 +1,601 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Copyright (c) 2020 Sartura Ltd. > + * > + * Driver for the TI TPS23861 PoE PSE. > + * > + * Author: Robert Marko <robert.marko@sartura.hr> > + */ > + > +#include <linux/bitfield.h> > +#include <linux/debugfs.h> > +#include <linux/delay.h> > +#include <linux/hwmon-sysfs.h> > +#include <linux/hwmon.h> > +#include <linux/i2c.h> > +#include <linux/module.h> > +#include <linux/of_device.h> > +#include <linux/regmap.h> > + > +#define TEMPERATURE 0x2c > +#define INPUT_VOLTAGE_LSB 0x2e > +#define INPUT_VOLTAGE_MSB 0x2f > +#define PORT_1_CURRENT_LSB 0x30 > +#define PORT_1_CURRENT_MSB 0x31 > +#define PORT_1_VOLTAGE_LSB 0x32 > +#define PORT_1_VOLTAGE_MSB 0x33 > +#define PORT_2_CURRENT_LSB 0x34 > +#define PORT_2_CURRENT_MSB 0x35 > +#define PORT_2_VOLTAGE_LSB 0x36 > +#define PORT_2_VOLTAGE_MSB 0x37 > +#define PORT_3_CURRENT_LSB 0x38 > +#define PORT_3_CURRENT_MSB 0x39 > +#define PORT_3_VOLTAGE_LSB 0x3a > +#define PORT_3_VOLTAGE_MSB 0x3b > +#define PORT_4_CURRENT_LSB 0x3c > +#define PORT_4_CURRENT_MSB 0x3d > +#define PORT_4_VOLTAGE_LSB 0x3e > +#define PORT_4_VOLTAGE_MSB 0x3f > +#define PORT_N_CURRENT_LSB_OFFSET 0x04 > +#define PORT_N_VOLTAGE_LSB_OFFSET 0x04 > +#define VOLTAGE_CURRENT_MASK GENMASK(13, 0) > +#define PORT_1_RESISTANCE_LSB 0x60 > +#define PORT_1_RESISTANCE_MSB 0x61 > +#define PORT_2_RESISTANCE_LSB 0x62 > +#define PORT_2_RESISTANCE_MSB 0x63 > +#define PORT_3_RESISTANCE_LSB 0x64 > +#define PORT_3_RESISTANCE_MSB 0x65 > +#define PORT_4_RESISTANCE_LSB 0x66 > +#define PORT_4_RESISTANCE_MSB 0x67 > +#define PORT_N_RESISTANCE_LSB_OFFSET 0x02 > +#define PORT_RESISTANCE_MASK GENMASK(13, 0) > +#define PORT_RESISTANCE_RSN_MASK GENMASK(15, 14) > +#define PORT_RESISTANCE_RSN_OTHER 0 > +#define PORT_RESISTANCE_RSN_LOW 1 > +#define PORT_RESISTANCE_RSN_OPEN 2 > +#define PORT_RESISTANCE_RSN_SHORT 3 > +#define PORT_1_STATUS 0x0c > +#define PORT_2_STATUS 0x0d > +#define PORT_3_STATUS 0x0e > +#define PORT_4_STATUS 0x0f > +#define PORT_STATUS_CLASS_MASK GENMASK(7, 4) > +#define PORT_STATUS_DETECT_MASK GENMASK(3, 0) > +#define PORT_CLASS_UNKNOWN 0 > +#define PORT_CLASS_1 1 > +#define PORT_CLASS_2 2 > +#define PORT_CLASS_3 3 > +#define PORT_CLASS_4 4 > +#define PORT_CLASS_RESERVED 5 > +#define PORT_CLASS_0 6 > +#define PORT_CLASS_OVERCURRENT 7 > +#define PORT_CLASS_MISMATCH 8 > +#define PORT_DETECT_UNKNOWN 0 > +#define PORT_DETECT_SHORT 1 > +#define PORT_DETECT_RESERVED 2 > +#define PORT_DETECT_RESISTANCE_LOW 3 > +#define PORT_DETECT_RESISTANCE_OK 4 > +#define PORT_DETECT_RESISTANCE_HIGH 5 > +#define PORT_DETECT_OPEN_CIRCUIT 6 > +#define PORT_DETECT_RESERVED_2 7 > +#define PORT_DETECT_MOSFET_FAULT 8 > +#define PORT_DETECT_LEGACY 9 > +/* Measurment beyond clamp voltage */ > +#define PORT_DETECT_CAPACITANCE_INVALID_BEYOND 10 > +/* Insufficient voltage delta */ > +#define PORT_DETECT_CAPACITANCE_INVALID_DELTA 11 > +#define PORT_DETECT_CAPACITANCE_OUT_OF_RANGE 12 > +#define POE_PLUS 0x40 > +#define OPERATING_MODE 0x12 > +#define OPERATING_MODE_OFF 0 > +#define OPERATING_MODE_MANUAL 1 > +#define OPERATING_MODE_SEMI 2 > +#define OPERATING_MODE_AUTO 3 > +#define OPERATING_MODE_PORT_1_MASK GENMASK(1, 0) > +#define OPERATING_MODE_PORT_2_MASK GENMASK(3, 2) > +#define OPERATING_MODE_PORT_3_MASK GENMASK(5, 4) > +#define OPERATING_MODE_PORT_4_MASK GENMASK(7, 6) > + > +#define DETECT_CLASS_RESTART 0x18 > +#define POWER_ENABLE 0x19 > +#define TPS23861_NUM_PORTS 4 > + > +#define TEMPERATURE_LSB 652 /* 0.652 degrees Celsius */ > +#define VOLTAGE_LSB 3662 /* 3.662 mV */ > +#define SHUNT_RESISTOR_DEFAULT 255000 /* 255 mOhm */ > +#define CURRENT_LSB_255 62260 /* 62.260 uA */ > +#define CURRENT_LSB_250 61039 /* 61.039 uA */ > +#define RESISTANCE_LSB 110966 /* 11.0966 Ohm*/ > +#define RESISTANCE_LSB_LOW 157216 /* 15.7216 Ohm*/ > + > +struct tps23861_data { > + struct regmap *regmap; > + u32 shunt_resistor; > + struct i2c_client *client; > + struct dentry *debugfs_dir; > +}; > + > +static struct regmap_config tps23861_regmap_config = { > + .reg_bits = 8, > + .val_bits = 8, > +}; > + > +static int tps23861_read_temp(struct tps23861_data *data, long *val) > +{ > + unsigned int regval; > + int err; > + > + err = regmap_read(data->regmap, TEMPERATURE, ®val); > + if (err < 0) > + return err; > + > + *val = (regval * TEMPERATURE_LSB) - 20000; > + > + return 0; > +} > + > +static int tps23861_read_voltage(struct tps23861_data *data, int channel, > + long *val) > +{ > + unsigned int regval; > + int err; > + > + if (channel < TPS23861_NUM_PORTS) { > + err = regmap_bulk_read(data->regmap, > + PORT_1_VOLTAGE_LSB + channel * PORT_N_VOLTAGE_LSB_OFFSET, > + ®val, 2); > + } else { > + err = regmap_bulk_read(data->regmap, > + INPUT_VOLTAGE_LSB, > + ®val, 2); > + } > + if (err < 0) > + return err; > + > + *val = (FIELD_GET(VOLTAGE_CURRENT_MASK, regval) * VOLTAGE_LSB) / 1000; > + > + return 0; > +} > + > +static int tps23861_read_current(struct tps23861_data *data, int channel, > + long *val) > +{ > + unsigned int current_lsb; > + unsigned int regval; > + int err; > + > + if (data->shunt_resistor == SHUNT_RESISTOR_DEFAULT) > + current_lsb = CURRENT_LSB_255; > + else > + current_lsb = CURRENT_LSB_250; > + > + err = regmap_bulk_read(data->regmap, > + PORT_1_CURRENT_LSB + channel * PORT_N_CURRENT_LSB_OFFSET, > + ®val, 2); > + if (err < 0) > + return err; > + > + *val = (FIELD_GET(VOLTAGE_CURRENT_MASK, regval) * current_lsb) / 1000000; > + > + return 0; > +} > + > +static int tps23861_port_disable(struct tps23861_data *data, int channel) > +{ > + unsigned int regval = 0; > + int err; > + > + regval |= BIT(channel + 4); > + err = regmap_write(data->regmap, POWER_ENABLE, regval); > + > + return err; > +} > + > +static int tps23861_port_enable(struct tps23861_data *data, int channel) > +{ > + unsigned int regval = 0; > + int err; > + > + regval |= BIT(channel); > + regval |= BIT(channel + 4); > + err = regmap_write(data->regmap, DETECT_CLASS_RESTART, regval); > + > + return err; > +} > + > +static umode_t tps23861_is_visible(const void *data, enum hwmon_sensor_types type, > + u32 attr, int channel) > +{ > + switch (type) { > + case hwmon_temp: > + switch (attr) { > + case hwmon_temp_input: > + case hwmon_temp_label: > + return 0444; > + default: > + return 0; > + } > + case hwmon_in: > + switch (attr) { > + case hwmon_in_input: > + case hwmon_in_label: > + return 0444; > + case hwmon_in_enable: > + return 0200; > + default: > + return 0; > + } > + case hwmon_curr: > + switch (attr) { > + case hwmon_curr_input: > + case hwmon_curr_label: > + return 0444; > + default: > + return 0; > + } > + default: > + return 0; > + } > +} > + > +static int tps23861_write(struct device *dev, enum hwmon_sensor_types type, > + u32 attr, int channel, long val) > +{ > + struct tps23861_data *data = dev_get_drvdata(dev); > + int err; > + > + switch (type) { > + case hwmon_in: > + switch (attr) { > + case hwmon_in_enable: > + if (val == 0) > + err = tps23861_port_disable(data, channel); > + else if (val == 1) > + err = tps23861_port_enable(data, channel); > + else > + err = -EINVAL; > + break; > + default: > + return -EOPNOTSUPP; > + } > + break; > + default: > + return -EOPNOTSUPP; > + } > + > + return err; > +} > + > +static int tps23861_read(struct device *dev, enum hwmon_sensor_types type, > + u32 attr, int channel, long *val) > +{ > + struct tps23861_data *data = dev_get_drvdata(dev); > + int err; > + > + switch (type) { > + case hwmon_temp: > + switch (attr) { > + case hwmon_temp_input: > + err = tps23861_read_temp(data, val); > + break; > + default: > + return -EOPNOTSUPP; > + } > + break; > + case hwmon_in: > + switch (attr) { > + case hwmon_in_input: > + err = tps23861_read_voltage(data, channel, val); > + break; > + default: > + return -EOPNOTSUPP; > + } > + break; > + case hwmon_curr: > + switch (attr) { > + case hwmon_curr_input: > + err = tps23861_read_current(data, channel, val); > + break; > + default: > + return -EOPNOTSUPP; > + } > + break; > + default: > + return -EOPNOTSUPP; > + } > + > + return err; > +} > + > +static const char * const tps23861_port_label[] = { > + "Port1", > + "Port2", > + "Port3", > + "Port4", > + "Input", > +}; > + > +static int tps23861_read_string(struct device *dev, > + enum hwmon_sensor_types type, > + u32 attr, int channel, const char **str) > +{ > + switch (type) { > + case hwmon_in: > + case hwmon_curr: > + *str = tps23861_port_label[channel]; > + break; > + case hwmon_temp: > + *str = "Die"; > + break; > + default: > + return -EOPNOTSUPP; > + } > + > + return 0; > +} > + > +static const struct hwmon_channel_info *tps23861_info[] = { > + HWMON_CHANNEL_INFO(chip, > + HWMON_C_REGISTER_TZ), > + HWMON_CHANNEL_INFO(temp, > + HWMON_T_INPUT | HWMON_T_LABEL), > + HWMON_CHANNEL_INFO(in, > + HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_LABEL), > + HWMON_CHANNEL_INFO(curr, > + HWMON_C_INPUT | HWMON_C_LABEL, > + HWMON_C_INPUT | HWMON_C_LABEL, > + HWMON_C_INPUT | HWMON_C_LABEL, > + HWMON_C_INPUT | HWMON_C_LABEL), > + NULL > +}; > + > +static const struct hwmon_ops tps23861_hwmon_ops = { > + .is_visible = tps23861_is_visible, > + .write = tps23861_write, > + .read = tps23861_read, > + .read_string = tps23861_read_string, > +}; > + > +static const struct hwmon_chip_info tps23861_chip_info = { > + .ops = &tps23861_hwmon_ops, > + .info = tps23861_info, > +}; > + > +static char *tps23861_port_operating_mode(struct tps23861_data *data, int port) > +{ > + unsigned int regval; > + int mode; > + > + regmap_read(data->regmap, OPERATING_MODE, ®val); > + > + switch (port) { > + case 1: > + mode = FIELD_GET(OPERATING_MODE_PORT_1_MASK, regval); > + break; > + case 2: > + mode = FIELD_GET(OPERATING_MODE_PORT_2_MASK, regval); > + break; > + case 3: > + mode = FIELD_GET(OPERATING_MODE_PORT_3_MASK, regval); > + break; > + case 4: > + mode = FIELD_GET(OPERATING_MODE_PORT_4_MASK, regval); > + break; > + default: > + mode = -EINVAL; > + } > + > + switch (mode) { > + case OPERATING_MODE_OFF: > + return "Off"; > + case OPERATING_MODE_MANUAL: > + return "Manual"; > + case OPERATING_MODE_SEMI: > + return "Semi-Auto"; > + case OPERATING_MODE_AUTO: > + return "Auto"; > + default: > + return "Invalid"; > + } > +} > + > +static char *tps23861_port_detect_status(struct tps23861_data *data, int port) > +{ > + unsigned int regval; > + > + regmap_read(data->regmap, > + PORT_1_STATUS + (port - 1), > + ®val); > + > + switch (FIELD_GET(PORT_STATUS_DETECT_MASK, regval)) { > + case PORT_DETECT_UNKNOWN: > + return "Unknown device"; > + case PORT_DETECT_SHORT: > + return "Short circuit"; > + case PORT_DETECT_RESISTANCE_LOW: > + return "Too low resistance"; > + case PORT_DETECT_RESISTANCE_OK: > + return "Valid resistance"; > + case PORT_DETECT_RESISTANCE_HIGH: > + return "Too high resistance"; > + case PORT_DETECT_OPEN_CIRCUIT: > + return "Open circuit"; > + case PORT_DETECT_MOSFET_FAULT: > + return "MOSFET fault"; > + case PORT_DETECT_LEGACY: > + return "Legacy device"; > + case PORT_DETECT_CAPACITANCE_INVALID_BEYOND: > + return "Invalid capacitance, beyond clamp voltage"; > + case PORT_DETECT_CAPACITANCE_INVALID_DELTA: > + return "Invalid capacitance, insufficient voltage delta"; > + case PORT_DETECT_CAPACITANCE_OUT_OF_RANGE: > + return "Valid capacitance, outside of legacy range"; > + case PORT_DETECT_RESERVED: > + case PORT_DETECT_RESERVED_2: > + default: > + return "Invalid"; > + } > +} > + > +static char *tps23861_port_class_status(struct tps23861_data *data, int port) > +{ > + unsigned int regval; > + > + regmap_read(data->regmap, > + PORT_1_STATUS + (port - 1), > + ®val); > + > + switch (FIELD_GET(PORT_STATUS_CLASS_MASK, regval)) { > + case PORT_CLASS_UNKNOWN: > + return "Unknown"; > + case PORT_CLASS_RESERVED: > + case PORT_CLASS_0: > + return "0"; > + case PORT_CLASS_1: > + return "1"; > + case PORT_CLASS_2: > + return "2"; > + case PORT_CLASS_3: > + return "3"; > + case PORT_CLASS_4: > + return "4"; > + case PORT_CLASS_OVERCURRENT: > + return "Overcurrent"; > + case PORT_CLASS_MISMATCH: > + return "Mismatch"; > + default: > + return "Invalid"; > + } > +} > + > +static char *tps23861_port_poe_plus_status(struct tps23861_data *data, int port) > +{ > + unsigned int regval; > + > + regmap_read(data->regmap, POE_PLUS, ®val); > + > + if (BIT(port + 3) & regval) > + return "Yes"; > + else > + return "No"; > +} > + > +static int tps23861_port_resistance(struct tps23861_data *data, int port) > +{ > + u16 regval; > + > + regmap_bulk_read(data->regmap, > + PORT_1_RESISTANCE_LSB + PORT_N_RESISTANCE_LSB_OFFSET * (port - 1), > + ®val, > + 2); > + > + switch (FIELD_GET(PORT_RESISTANCE_RSN_MASK, regval)) { > + case PORT_RESISTANCE_RSN_OTHER: > + return (FIELD_GET(PORT_RESISTANCE_MASK, regval) * RESISTANCE_LSB) / 10000; > + case PORT_RESISTANCE_RSN_LOW: > + return (FIELD_GET(PORT_RESISTANCE_MASK, regval) * RESISTANCE_LSB_LOW) / 10000; > + case PORT_RESISTANCE_RSN_SHORT: > + case PORT_RESISTANCE_RSN_OPEN: > + default: > + return 0; > + } > +} > + > +static int tps23861_port_status_show(struct seq_file *s, void *data) > +{ > + struct tps23861_data *priv = s->private; > + int i; > + > + for (i = 1; i < TPS23861_NUM_PORTS + 1; i++) { > + seq_printf(s, "Port: \t\t%d\n", i); > + seq_printf(s, "Operating mode: %s\n", tps23861_port_operating_mode(priv, i)); > + seq_printf(s, "Detected: \t%s\n", tps23861_port_detect_status(priv, i)); > + seq_printf(s, "Class: \t\t%s\n", tps23861_port_class_status(priv, i)); > + seq_printf(s, "PoE Plus: \t%s\n", tps23861_port_poe_plus_status(priv, i)); > + seq_printf(s, "Resistance: \t%d\n", tps23861_port_resistance(priv, i)); > + seq_putc(s, '\n'); > + } > + > + return 0; > +} > + > +DEFINE_SHOW_ATTRIBUTE(tps23861_port_status); > + > +static void tps23861_init_debugfs(struct tps23861_data *data) > +{ > + data->debugfs_dir = debugfs_create_dir(data->client->name, NULL); > + > + debugfs_create_file("port_status", > + 0400, > + data->debugfs_dir, > + data, > + &tps23861_port_status_fops); > +} > + > +static int tps23861_probe(struct i2c_client *client) > +{ > + struct device *dev = &client->dev; > + struct tps23861_data *data; > + struct device *hwmon_dev; > + u32 shunt_resistor; > + > + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); > + if (!data) > + return -ENOMEM; > + > + data->client = client; > + i2c_set_clientdata(client, data); > + > + data->regmap = devm_regmap_init_i2c(client, &tps23861_regmap_config); > + if (IS_ERR(data->regmap)) { > + dev_err(dev, "failed to allocate register map\n"); > + return PTR_ERR(data->regmap); > + } > + > + if (!of_property_read_u32(dev->of_node, "shunt-resistor-micro-ohms", &shunt_resistor)) > + data->shunt_resistor = shunt_resistor; > + else > + data->shunt_resistor = SHUNT_RESISTOR_DEFAULT; > + > + hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, > + data, &tps23861_chip_info, > + NULL); > + if (IS_ERR(hwmon_dev)) > + return PTR_ERR(hwmon_dev); > + > + tps23861_init_debugfs(data); > + > + return 0; > +} > + > +static int tps23861_remove(struct i2c_client *client) > +{ > + struct tps23861_data *data = i2c_get_clientdata(client); > + > + debugfs_remove_recursive(data->debugfs_dir); > + > + return 0; > +} > + > +static const struct of_device_id __maybe_unused tps23861_of_match[] = { > + { .compatible = "ti,tps23861", }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, tps23861_of_match); > + > +static struct i2c_driver tps23861_driver = { > + .probe_new = tps23861_probe, > + .remove = tps23861_remove, > + .driver = { > + .name = "tps23861", > + .of_match_table = of_match_ptr(tps23861_of_match), > + }, > +}; > +module_i2c_driver(tps23861_driver); > + > +MODULE_LICENSE("GPL"); > +MODULE_AUTHOR("Robert Marko <robert.marko@sartura.hr>"); > +MODULE_DESCRIPTION("TI TPS23861 PoE PSE");
On Thu, Jan 21, 2021 at 02:44:33PM +0100, Robert Marko wrote: > Add basic monitoring support as well as port on/off control for Texas > Instruments TPS23861 PoE PSE IC. > > Signed-off-by: Robert Marko <robert.marko@sartura.hr> > Cc: Luka Perkov <luka.perkov@sartura.hr> > Reviewed-by: Guenter Roeck <linux@roeck-us.net> Applied. Thanks, Guenter > --- > Changes in v4: > * Add documentation > * Correct of_property_read_u32() return check > * Drop useless and incorrect debugfs return check > > Changes in v3: > * Leave only standard values in hwmon hwmon > * Drop custom sysfs entries > * Use debugfs to provide non standard debug information > * Add temperature label > * Use hwmon_in_enable to enable/disable ports > > Changes in v2: > * Convert to devm_hwmon_device_register_with_info() > * Change license > > Documentation/hwmon/index.rst | 1 + > Documentation/hwmon/tps23861.rst | 41 +++ > drivers/hwmon/Kconfig | 11 + > drivers/hwmon/Makefile | 1 + > drivers/hwmon/tps23861.c | 601 +++++++++++++++++++++++++++++++ > 5 files changed, 655 insertions(+) > create mode 100644 Documentation/hwmon/tps23861.rst > create mode 100644 drivers/hwmon/tps23861.c > > diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst > index fcb870ce6286..2c94f0b524dd 100644 > --- a/Documentation/hwmon/index.rst > +++ b/Documentation/hwmon/index.rst > @@ -178,6 +178,7 @@ Hardware Monitoring Kernel Drivers > tmp401 > tmp421 > tmp513 > + tps23861 > tps40422 > tps53679 > twl4030-madc-hwmon > diff --git a/Documentation/hwmon/tps23861.rst b/Documentation/hwmon/tps23861.rst > new file mode 100644 > index 000000000000..46d121ff3f31 > --- /dev/null > +++ b/Documentation/hwmon/tps23861.rst > @@ -0,0 +1,41 @@ > +.. SPDX-License-Identifier: GPL-2.0-only > + > +Kernel driver tps23861 > +====================== > + > +Supported chips: > + * Texas Instruments TPS23861 > + > + Prefix: 'tps23861' > + > + Datasheet: https://www.ti.com/lit/gpn/tps23861 > + > +Author: Robert Marko <robert.marko@sartura.hr> > + > +Description > +----------- > + > +This driver supports hardware monitoring for Texas Instruments TPS23861 PoE PSE. > + > +TPS23861 is a quad port IEEE802.3at PSE controller with optional I2C control > +and monitoring capabilities. > + > +TPS23861 offers three modes of operation: Auto, Semi-Auto and Manual. > + > +This driver only supports the Auto mode of operation providing monitoring > +as well as enabling/disabling the four ports. > + > +Sysfs entries > +------------- > + > +======================= ===================================================================== > +in[0-3]_input Voltage on ports [1-4] > +in[0-3]_label "Port[1-4]" > +in4_input IC input voltage > +in4_label "Input" > +temp1_input IC die temperature > +temp1_label "Die" > +curr[1-4]_input Current on ports [1-4] > +in[1-4]_label "Port[1-4]" > +in[0-3]_enable Enable/disable ports [1-4] > +======================= ===================================================================== > diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig > index 1ecf697d8d99..e2a3aeed0628 100644 > --- a/drivers/hwmon/Kconfig > +++ b/drivers/hwmon/Kconfig > @@ -1136,6 +1136,17 @@ config SENSORS_TC654 > This driver can also be built as a module. If so, the module > will be called tc654. > > +config SENSORS_TPS23861 > + tristate "Texas Instruments TPS23861 PoE PSE" > + depends on I2C > + select REGMAP_I2C > + help > + If you say yes here you get support for Texas Instruments > + TPS23861 802.3at PoE PSE chips. > + > + This driver can also be built as a module. If so, the module > + will be called tps23861. > + > config SENSORS_MENF21BMC_HWMON > tristate "MEN 14F021P00 BMC Hardware Monitoring" > depends on MFD_MENF21BMC > diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile > index 09a86c5e1d29..583ca5dbd838 100644 > --- a/drivers/hwmon/Makefile > +++ b/drivers/hwmon/Makefile > @@ -144,6 +144,7 @@ obj-$(CONFIG_SENSORS_MAX31790) += max31790.o > obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o > obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o > obj-$(CONFIG_SENSORS_TC654) += tc654.o > +obj-$(CONFIG_SENSORS_TPS23861) += tps23861.o > obj-$(CONFIG_SENSORS_MLXREG_FAN) += mlxreg-fan.o > obj-$(CONFIG_SENSORS_MENF21BMC_HWMON) += menf21bmc_hwmon.o > obj-$(CONFIG_SENSORS_MR75203) += mr75203.o > diff --git a/drivers/hwmon/tps23861.c b/drivers/hwmon/tps23861.c > new file mode 100644 > index 000000000000..c2484f15298b > --- /dev/null > +++ b/drivers/hwmon/tps23861.c > @@ -0,0 +1,601 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Copyright (c) 2020 Sartura Ltd. > + * > + * Driver for the TI TPS23861 PoE PSE. > + * > + * Author: Robert Marko <robert.marko@sartura.hr> > + */ > + > +#include <linux/bitfield.h> > +#include <linux/debugfs.h> > +#include <linux/delay.h> > +#include <linux/hwmon-sysfs.h> > +#include <linux/hwmon.h> > +#include <linux/i2c.h> > +#include <linux/module.h> > +#include <linux/of_device.h> > +#include <linux/regmap.h> > + > +#define TEMPERATURE 0x2c > +#define INPUT_VOLTAGE_LSB 0x2e > +#define INPUT_VOLTAGE_MSB 0x2f > +#define PORT_1_CURRENT_LSB 0x30 > +#define PORT_1_CURRENT_MSB 0x31 > +#define PORT_1_VOLTAGE_LSB 0x32 > +#define PORT_1_VOLTAGE_MSB 0x33 > +#define PORT_2_CURRENT_LSB 0x34 > +#define PORT_2_CURRENT_MSB 0x35 > +#define PORT_2_VOLTAGE_LSB 0x36 > +#define PORT_2_VOLTAGE_MSB 0x37 > +#define PORT_3_CURRENT_LSB 0x38 > +#define PORT_3_CURRENT_MSB 0x39 > +#define PORT_3_VOLTAGE_LSB 0x3a > +#define PORT_3_VOLTAGE_MSB 0x3b > +#define PORT_4_CURRENT_LSB 0x3c > +#define PORT_4_CURRENT_MSB 0x3d > +#define PORT_4_VOLTAGE_LSB 0x3e > +#define PORT_4_VOLTAGE_MSB 0x3f > +#define PORT_N_CURRENT_LSB_OFFSET 0x04 > +#define PORT_N_VOLTAGE_LSB_OFFSET 0x04 > +#define VOLTAGE_CURRENT_MASK GENMASK(13, 0) > +#define PORT_1_RESISTANCE_LSB 0x60 > +#define PORT_1_RESISTANCE_MSB 0x61 > +#define PORT_2_RESISTANCE_LSB 0x62 > +#define PORT_2_RESISTANCE_MSB 0x63 > +#define PORT_3_RESISTANCE_LSB 0x64 > +#define PORT_3_RESISTANCE_MSB 0x65 > +#define PORT_4_RESISTANCE_LSB 0x66 > +#define PORT_4_RESISTANCE_MSB 0x67 > +#define PORT_N_RESISTANCE_LSB_OFFSET 0x02 > +#define PORT_RESISTANCE_MASK GENMASK(13, 0) > +#define PORT_RESISTANCE_RSN_MASK GENMASK(15, 14) > +#define PORT_RESISTANCE_RSN_OTHER 0 > +#define PORT_RESISTANCE_RSN_LOW 1 > +#define PORT_RESISTANCE_RSN_OPEN 2 > +#define PORT_RESISTANCE_RSN_SHORT 3 > +#define PORT_1_STATUS 0x0c > +#define PORT_2_STATUS 0x0d > +#define PORT_3_STATUS 0x0e > +#define PORT_4_STATUS 0x0f > +#define PORT_STATUS_CLASS_MASK GENMASK(7, 4) > +#define PORT_STATUS_DETECT_MASK GENMASK(3, 0) > +#define PORT_CLASS_UNKNOWN 0 > +#define PORT_CLASS_1 1 > +#define PORT_CLASS_2 2 > +#define PORT_CLASS_3 3 > +#define PORT_CLASS_4 4 > +#define PORT_CLASS_RESERVED 5 > +#define PORT_CLASS_0 6 > +#define PORT_CLASS_OVERCURRENT 7 > +#define PORT_CLASS_MISMATCH 8 > +#define PORT_DETECT_UNKNOWN 0 > +#define PORT_DETECT_SHORT 1 > +#define PORT_DETECT_RESERVED 2 > +#define PORT_DETECT_RESISTANCE_LOW 3 > +#define PORT_DETECT_RESISTANCE_OK 4 > +#define PORT_DETECT_RESISTANCE_HIGH 5 > +#define PORT_DETECT_OPEN_CIRCUIT 6 > +#define PORT_DETECT_RESERVED_2 7 > +#define PORT_DETECT_MOSFET_FAULT 8 > +#define PORT_DETECT_LEGACY 9 > +/* Measurment beyond clamp voltage */ > +#define PORT_DETECT_CAPACITANCE_INVALID_BEYOND 10 > +/* Insufficient voltage delta */ > +#define PORT_DETECT_CAPACITANCE_INVALID_DELTA 11 > +#define PORT_DETECT_CAPACITANCE_OUT_OF_RANGE 12 > +#define POE_PLUS 0x40 > +#define OPERATING_MODE 0x12 > +#define OPERATING_MODE_OFF 0 > +#define OPERATING_MODE_MANUAL 1 > +#define OPERATING_MODE_SEMI 2 > +#define OPERATING_MODE_AUTO 3 > +#define OPERATING_MODE_PORT_1_MASK GENMASK(1, 0) > +#define OPERATING_MODE_PORT_2_MASK GENMASK(3, 2) > +#define OPERATING_MODE_PORT_3_MASK GENMASK(5, 4) > +#define OPERATING_MODE_PORT_4_MASK GENMASK(7, 6) > + > +#define DETECT_CLASS_RESTART 0x18 > +#define POWER_ENABLE 0x19 > +#define TPS23861_NUM_PORTS 4 > + > +#define TEMPERATURE_LSB 652 /* 0.652 degrees Celsius */ > +#define VOLTAGE_LSB 3662 /* 3.662 mV */ > +#define SHUNT_RESISTOR_DEFAULT 255000 /* 255 mOhm */ > +#define CURRENT_LSB_255 62260 /* 62.260 uA */ > +#define CURRENT_LSB_250 61039 /* 61.039 uA */ > +#define RESISTANCE_LSB 110966 /* 11.0966 Ohm*/ > +#define RESISTANCE_LSB_LOW 157216 /* 15.7216 Ohm*/ > + > +struct tps23861_data { > + struct regmap *regmap; > + u32 shunt_resistor; > + struct i2c_client *client; > + struct dentry *debugfs_dir; > +}; > + > +static struct regmap_config tps23861_regmap_config = { > + .reg_bits = 8, > + .val_bits = 8, > +}; > + > +static int tps23861_read_temp(struct tps23861_data *data, long *val) > +{ > + unsigned int regval; > + int err; > + > + err = regmap_read(data->regmap, TEMPERATURE, ®val); > + if (err < 0) > + return err; > + > + *val = (regval * TEMPERATURE_LSB) - 20000; > + > + return 0; > +} > + > +static int tps23861_read_voltage(struct tps23861_data *data, int channel, > + long *val) > +{ > + unsigned int regval; > + int err; > + > + if (channel < TPS23861_NUM_PORTS) { > + err = regmap_bulk_read(data->regmap, > + PORT_1_VOLTAGE_LSB + channel * PORT_N_VOLTAGE_LSB_OFFSET, > + ®val, 2); > + } else { > + err = regmap_bulk_read(data->regmap, > + INPUT_VOLTAGE_LSB, > + ®val, 2); > + } > + if (err < 0) > + return err; > + > + *val = (FIELD_GET(VOLTAGE_CURRENT_MASK, regval) * VOLTAGE_LSB) / 1000; > + > + return 0; > +} > + > +static int tps23861_read_current(struct tps23861_data *data, int channel, > + long *val) > +{ > + unsigned int current_lsb; > + unsigned int regval; > + int err; > + > + if (data->shunt_resistor == SHUNT_RESISTOR_DEFAULT) > + current_lsb = CURRENT_LSB_255; > + else > + current_lsb = CURRENT_LSB_250; > + > + err = regmap_bulk_read(data->regmap, > + PORT_1_CURRENT_LSB + channel * PORT_N_CURRENT_LSB_OFFSET, > + ®val, 2); > + if (err < 0) > + return err; > + > + *val = (FIELD_GET(VOLTAGE_CURRENT_MASK, regval) * current_lsb) / 1000000; > + > + return 0; > +} > + > +static int tps23861_port_disable(struct tps23861_data *data, int channel) > +{ > + unsigned int regval = 0; > + int err; > + > + regval |= BIT(channel + 4); > + err = regmap_write(data->regmap, POWER_ENABLE, regval); > + > + return err; > +} > + > +static int tps23861_port_enable(struct tps23861_data *data, int channel) > +{ > + unsigned int regval = 0; > + int err; > + > + regval |= BIT(channel); > + regval |= BIT(channel + 4); > + err = regmap_write(data->regmap, DETECT_CLASS_RESTART, regval); > + > + return err; > +} > + > +static umode_t tps23861_is_visible(const void *data, enum hwmon_sensor_types type, > + u32 attr, int channel) > +{ > + switch (type) { > + case hwmon_temp: > + switch (attr) { > + case hwmon_temp_input: > + case hwmon_temp_label: > + return 0444; > + default: > + return 0; > + } > + case hwmon_in: > + switch (attr) { > + case hwmon_in_input: > + case hwmon_in_label: > + return 0444; > + case hwmon_in_enable: > + return 0200; > + default: > + return 0; > + } > + case hwmon_curr: > + switch (attr) { > + case hwmon_curr_input: > + case hwmon_curr_label: > + return 0444; > + default: > + return 0; > + } > + default: > + return 0; > + } > +} > + > +static int tps23861_write(struct device *dev, enum hwmon_sensor_types type, > + u32 attr, int channel, long val) > +{ > + struct tps23861_data *data = dev_get_drvdata(dev); > + int err; > + > + switch (type) { > + case hwmon_in: > + switch (attr) { > + case hwmon_in_enable: > + if (val == 0) > + err = tps23861_port_disable(data, channel); > + else if (val == 1) > + err = tps23861_port_enable(data, channel); > + else > + err = -EINVAL; > + break; > + default: > + return -EOPNOTSUPP; > + } > + break; > + default: > + return -EOPNOTSUPP; > + } > + > + return err; > +} > + > +static int tps23861_read(struct device *dev, enum hwmon_sensor_types type, > + u32 attr, int channel, long *val) > +{ > + struct tps23861_data *data = dev_get_drvdata(dev); > + int err; > + > + switch (type) { > + case hwmon_temp: > + switch (attr) { > + case hwmon_temp_input: > + err = tps23861_read_temp(data, val); > + break; > + default: > + return -EOPNOTSUPP; > + } > + break; > + case hwmon_in: > + switch (attr) { > + case hwmon_in_input: > + err = tps23861_read_voltage(data, channel, val); > + break; > + default: > + return -EOPNOTSUPP; > + } > + break; > + case hwmon_curr: > + switch (attr) { > + case hwmon_curr_input: > + err = tps23861_read_current(data, channel, val); > + break; > + default: > + return -EOPNOTSUPP; > + } > + break; > + default: > + return -EOPNOTSUPP; > + } > + > + return err; > +} > + > +static const char * const tps23861_port_label[] = { > + "Port1", > + "Port2", > + "Port3", > + "Port4", > + "Input", > +}; > + > +static int tps23861_read_string(struct device *dev, > + enum hwmon_sensor_types type, > + u32 attr, int channel, const char **str) > +{ > + switch (type) { > + case hwmon_in: > + case hwmon_curr: > + *str = tps23861_port_label[channel]; > + break; > + case hwmon_temp: > + *str = "Die"; > + break; > + default: > + return -EOPNOTSUPP; > + } > + > + return 0; > +} > + > +static const struct hwmon_channel_info *tps23861_info[] = { > + HWMON_CHANNEL_INFO(chip, > + HWMON_C_REGISTER_TZ), > + HWMON_CHANNEL_INFO(temp, > + HWMON_T_INPUT | HWMON_T_LABEL), > + HWMON_CHANNEL_INFO(in, > + HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_LABEL), > + HWMON_CHANNEL_INFO(curr, > + HWMON_C_INPUT | HWMON_C_LABEL, > + HWMON_C_INPUT | HWMON_C_LABEL, > + HWMON_C_INPUT | HWMON_C_LABEL, > + HWMON_C_INPUT | HWMON_C_LABEL), > + NULL > +}; > + > +static const struct hwmon_ops tps23861_hwmon_ops = { > + .is_visible = tps23861_is_visible, > + .write = tps23861_write, > + .read = tps23861_read, > + .read_string = tps23861_read_string, > +}; > + > +static const struct hwmon_chip_info tps23861_chip_info = { > + .ops = &tps23861_hwmon_ops, > + .info = tps23861_info, > +}; > + > +static char *tps23861_port_operating_mode(struct tps23861_data *data, int port) > +{ > + unsigned int regval; > + int mode; > + > + regmap_read(data->regmap, OPERATING_MODE, ®val); > + > + switch (port) { > + case 1: > + mode = FIELD_GET(OPERATING_MODE_PORT_1_MASK, regval); > + break; > + case 2: > + mode = FIELD_GET(OPERATING_MODE_PORT_2_MASK, regval); > + break; > + case 3: > + mode = FIELD_GET(OPERATING_MODE_PORT_3_MASK, regval); > + break; > + case 4: > + mode = FIELD_GET(OPERATING_MODE_PORT_4_MASK, regval); > + break; > + default: > + mode = -EINVAL; > + } > + > + switch (mode) { > + case OPERATING_MODE_OFF: > + return "Off"; > + case OPERATING_MODE_MANUAL: > + return "Manual"; > + case OPERATING_MODE_SEMI: > + return "Semi-Auto"; > + case OPERATING_MODE_AUTO: > + return "Auto"; > + default: > + return "Invalid"; > + } > +} > + > +static char *tps23861_port_detect_status(struct tps23861_data *data, int port) > +{ > + unsigned int regval; > + > + regmap_read(data->regmap, > + PORT_1_STATUS + (port - 1), > + ®val); > + > + switch (FIELD_GET(PORT_STATUS_DETECT_MASK, regval)) { > + case PORT_DETECT_UNKNOWN: > + return "Unknown device"; > + case PORT_DETECT_SHORT: > + return "Short circuit"; > + case PORT_DETECT_RESISTANCE_LOW: > + return "Too low resistance"; > + case PORT_DETECT_RESISTANCE_OK: > + return "Valid resistance"; > + case PORT_DETECT_RESISTANCE_HIGH: > + return "Too high resistance"; > + case PORT_DETECT_OPEN_CIRCUIT: > + return "Open circuit"; > + case PORT_DETECT_MOSFET_FAULT: > + return "MOSFET fault"; > + case PORT_DETECT_LEGACY: > + return "Legacy device"; > + case PORT_DETECT_CAPACITANCE_INVALID_BEYOND: > + return "Invalid capacitance, beyond clamp voltage"; > + case PORT_DETECT_CAPACITANCE_INVALID_DELTA: > + return "Invalid capacitance, insufficient voltage delta"; > + case PORT_DETECT_CAPACITANCE_OUT_OF_RANGE: > + return "Valid capacitance, outside of legacy range"; > + case PORT_DETECT_RESERVED: > + case PORT_DETECT_RESERVED_2: > + default: > + return "Invalid"; > + } > +} > + > +static char *tps23861_port_class_status(struct tps23861_data *data, int port) > +{ > + unsigned int regval; > + > + regmap_read(data->regmap, > + PORT_1_STATUS + (port - 1), > + ®val); > + > + switch (FIELD_GET(PORT_STATUS_CLASS_MASK, regval)) { > + case PORT_CLASS_UNKNOWN: > + return "Unknown"; > + case PORT_CLASS_RESERVED: > + case PORT_CLASS_0: > + return "0"; > + case PORT_CLASS_1: > + return "1"; > + case PORT_CLASS_2: > + return "2"; > + case PORT_CLASS_3: > + return "3"; > + case PORT_CLASS_4: > + return "4"; > + case PORT_CLASS_OVERCURRENT: > + return "Overcurrent"; > + case PORT_CLASS_MISMATCH: > + return "Mismatch"; > + default: > + return "Invalid"; > + } > +} > + > +static char *tps23861_port_poe_plus_status(struct tps23861_data *data, int port) > +{ > + unsigned int regval; > + > + regmap_read(data->regmap, POE_PLUS, ®val); > + > + if (BIT(port + 3) & regval) > + return "Yes"; > + else > + return "No"; > +} > + > +static int tps23861_port_resistance(struct tps23861_data *data, int port) > +{ > + u16 regval; > + > + regmap_bulk_read(data->regmap, > + PORT_1_RESISTANCE_LSB + PORT_N_RESISTANCE_LSB_OFFSET * (port - 1), > + ®val, > + 2); > + > + switch (FIELD_GET(PORT_RESISTANCE_RSN_MASK, regval)) { > + case PORT_RESISTANCE_RSN_OTHER: > + return (FIELD_GET(PORT_RESISTANCE_MASK, regval) * RESISTANCE_LSB) / 10000; > + case PORT_RESISTANCE_RSN_LOW: > + return (FIELD_GET(PORT_RESISTANCE_MASK, regval) * RESISTANCE_LSB_LOW) / 10000; > + case PORT_RESISTANCE_RSN_SHORT: > + case PORT_RESISTANCE_RSN_OPEN: > + default: > + return 0; > + } > +} > + > +static int tps23861_port_status_show(struct seq_file *s, void *data) > +{ > + struct tps23861_data *priv = s->private; > + int i; > + > + for (i = 1; i < TPS23861_NUM_PORTS + 1; i++) { > + seq_printf(s, "Port: \t\t%d\n", i); > + seq_printf(s, "Operating mode: %s\n", tps23861_port_operating_mode(priv, i)); > + seq_printf(s, "Detected: \t%s\n", tps23861_port_detect_status(priv, i)); > + seq_printf(s, "Class: \t\t%s\n", tps23861_port_class_status(priv, i)); > + seq_printf(s, "PoE Plus: \t%s\n", tps23861_port_poe_plus_status(priv, i)); > + seq_printf(s, "Resistance: \t%d\n", tps23861_port_resistance(priv, i)); > + seq_putc(s, '\n'); > + } > + > + return 0; > +} > + > +DEFINE_SHOW_ATTRIBUTE(tps23861_port_status); > + > +static void tps23861_init_debugfs(struct tps23861_data *data) > +{ > + data->debugfs_dir = debugfs_create_dir(data->client->name, NULL); > + > + debugfs_create_file("port_status", > + 0400, > + data->debugfs_dir, > + data, > + &tps23861_port_status_fops); > +} > + > +static int tps23861_probe(struct i2c_client *client) > +{ > + struct device *dev = &client->dev; > + struct tps23861_data *data; > + struct device *hwmon_dev; > + u32 shunt_resistor; > + > + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); > + if (!data) > + return -ENOMEM; > + > + data->client = client; > + i2c_set_clientdata(client, data); > + > + data->regmap = devm_regmap_init_i2c(client, &tps23861_regmap_config); > + if (IS_ERR(data->regmap)) { > + dev_err(dev, "failed to allocate register map\n"); > + return PTR_ERR(data->regmap); > + } > + > + if (!of_property_read_u32(dev->of_node, "shunt-resistor-micro-ohms", &shunt_resistor)) > + data->shunt_resistor = shunt_resistor; > + else > + data->shunt_resistor = SHUNT_RESISTOR_DEFAULT; > + > + hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, > + data, &tps23861_chip_info, > + NULL); > + if (IS_ERR(hwmon_dev)) > + return PTR_ERR(hwmon_dev); > + > + tps23861_init_debugfs(data); > + > + return 0; > +} > + > +static int tps23861_remove(struct i2c_client *client) > +{ > + struct tps23861_data *data = i2c_get_clientdata(client); > + > + debugfs_remove_recursive(data->debugfs_dir); > + > + return 0; > +} > + > +static const struct of_device_id __maybe_unused tps23861_of_match[] = { > + { .compatible = "ti,tps23861", }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, tps23861_of_match); > + > +static struct i2c_driver tps23861_driver = { > + .probe_new = tps23861_probe, > + .remove = tps23861_remove, > + .driver = { > + .name = "tps23861", > + .of_match_table = of_match_ptr(tps23861_of_match), > + }, > +}; > +module_i2c_driver(tps23861_driver); > + > +MODULE_LICENSE("GPL"); > +MODULE_AUTHOR("Robert Marko <robert.marko@sartura.hr>"); > +MODULE_DESCRIPTION("TI TPS23861 PoE PSE");
diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index fcb870ce6286..2c94f0b524dd 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -178,6 +178,7 @@ Hardware Monitoring Kernel Drivers tmp401 tmp421 tmp513 + tps23861 tps40422 tps53679 twl4030-madc-hwmon diff --git a/Documentation/hwmon/tps23861.rst b/Documentation/hwmon/tps23861.rst new file mode 100644 index 000000000000..46d121ff3f31 --- /dev/null +++ b/Documentation/hwmon/tps23861.rst @@ -0,0 +1,41 @@ +.. SPDX-License-Identifier: GPL-2.0-only + +Kernel driver tps23861 +====================== + +Supported chips: + * Texas Instruments TPS23861 + + Prefix: 'tps23861' + + Datasheet: https://www.ti.com/lit/gpn/tps23861 + +Author: Robert Marko <robert.marko@sartura.hr> + +Description +----------- + +This driver supports hardware monitoring for Texas Instruments TPS23861 PoE PSE. + +TPS23861 is a quad port IEEE802.3at PSE controller with optional I2C control +and monitoring capabilities. + +TPS23861 offers three modes of operation: Auto, Semi-Auto and Manual. + +This driver only supports the Auto mode of operation providing monitoring +as well as enabling/disabling the four ports. + +Sysfs entries +------------- + +======================= ===================================================================== +in[0-3]_input Voltage on ports [1-4] +in[0-3]_label "Port[1-4]" +in4_input IC input voltage +in4_label "Input" +temp1_input IC die temperature +temp1_label "Die" +curr[1-4]_input Current on ports [1-4] +in[1-4]_label "Port[1-4]" +in[0-3]_enable Enable/disable ports [1-4] +======================= ===================================================================== diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 1ecf697d8d99..e2a3aeed0628 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1136,6 +1136,17 @@ config SENSORS_TC654 This driver can also be built as a module. If so, the module will be called tc654. +config SENSORS_TPS23861 + tristate "Texas Instruments TPS23861 PoE PSE" + depends on I2C + select REGMAP_I2C + help + If you say yes here you get support for Texas Instruments + TPS23861 802.3at PoE PSE chips. + + This driver can also be built as a module. If so, the module + will be called tps23861. + config SENSORS_MENF21BMC_HWMON tristate "MEN 14F021P00 BMC Hardware Monitoring" depends on MFD_MENF21BMC diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 09a86c5e1d29..583ca5dbd838 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -144,6 +144,7 @@ obj-$(CONFIG_SENSORS_MAX31790) += max31790.o obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o obj-$(CONFIG_SENSORS_TC654) += tc654.o +obj-$(CONFIG_SENSORS_TPS23861) += tps23861.o obj-$(CONFIG_SENSORS_MLXREG_FAN) += mlxreg-fan.o obj-$(CONFIG_SENSORS_MENF21BMC_HWMON) += menf21bmc_hwmon.o obj-$(CONFIG_SENSORS_MR75203) += mr75203.o diff --git a/drivers/hwmon/tps23861.c b/drivers/hwmon/tps23861.c new file mode 100644 index 000000000000..c2484f15298b --- /dev/null +++ b/drivers/hwmon/tps23861.c @@ -0,0 +1,601 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2020 Sartura Ltd. + * + * Driver for the TI TPS23861 PoE PSE. + * + * Author: Robert Marko <robert.marko@sartura.hr> + */ + +#include <linux/bitfield.h> +#include <linux/debugfs.h> +#include <linux/delay.h> +#include <linux/hwmon-sysfs.h> +#include <linux/hwmon.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/regmap.h> + +#define TEMPERATURE 0x2c +#define INPUT_VOLTAGE_LSB 0x2e +#define INPUT_VOLTAGE_MSB 0x2f +#define PORT_1_CURRENT_LSB 0x30 +#define PORT_1_CURRENT_MSB 0x31 +#define PORT_1_VOLTAGE_LSB 0x32 +#define PORT_1_VOLTAGE_MSB 0x33 +#define PORT_2_CURRENT_LSB 0x34 +#define PORT_2_CURRENT_MSB 0x35 +#define PORT_2_VOLTAGE_LSB 0x36 +#define PORT_2_VOLTAGE_MSB 0x37 +#define PORT_3_CURRENT_LSB 0x38 +#define PORT_3_CURRENT_MSB 0x39 +#define PORT_3_VOLTAGE_LSB 0x3a +#define PORT_3_VOLTAGE_MSB 0x3b +#define PORT_4_CURRENT_LSB 0x3c +#define PORT_4_CURRENT_MSB 0x3d +#define PORT_4_VOLTAGE_LSB 0x3e +#define PORT_4_VOLTAGE_MSB 0x3f +#define PORT_N_CURRENT_LSB_OFFSET 0x04 +#define PORT_N_VOLTAGE_LSB_OFFSET 0x04 +#define VOLTAGE_CURRENT_MASK GENMASK(13, 0) +#define PORT_1_RESISTANCE_LSB 0x60 +#define PORT_1_RESISTANCE_MSB 0x61 +#define PORT_2_RESISTANCE_LSB 0x62 +#define PORT_2_RESISTANCE_MSB 0x63 +#define PORT_3_RESISTANCE_LSB 0x64 +#define PORT_3_RESISTANCE_MSB 0x65 +#define PORT_4_RESISTANCE_LSB 0x66 +#define PORT_4_RESISTANCE_MSB 0x67 +#define PORT_N_RESISTANCE_LSB_OFFSET 0x02 +#define PORT_RESISTANCE_MASK GENMASK(13, 0) +#define PORT_RESISTANCE_RSN_MASK GENMASK(15, 14) +#define PORT_RESISTANCE_RSN_OTHER 0 +#define PORT_RESISTANCE_RSN_LOW 1 +#define PORT_RESISTANCE_RSN_OPEN 2 +#define PORT_RESISTANCE_RSN_SHORT 3 +#define PORT_1_STATUS 0x0c +#define PORT_2_STATUS 0x0d +#define PORT_3_STATUS 0x0e +#define PORT_4_STATUS 0x0f +#define PORT_STATUS_CLASS_MASK GENMASK(7, 4) +#define PORT_STATUS_DETECT_MASK GENMASK(3, 0) +#define PORT_CLASS_UNKNOWN 0 +#define PORT_CLASS_1 1 +#define PORT_CLASS_2 2 +#define PORT_CLASS_3 3 +#define PORT_CLASS_4 4 +#define PORT_CLASS_RESERVED 5 +#define PORT_CLASS_0 6 +#define PORT_CLASS_OVERCURRENT 7 +#define PORT_CLASS_MISMATCH 8 +#define PORT_DETECT_UNKNOWN 0 +#define PORT_DETECT_SHORT 1 +#define PORT_DETECT_RESERVED 2 +#define PORT_DETECT_RESISTANCE_LOW 3 +#define PORT_DETECT_RESISTANCE_OK 4 +#define PORT_DETECT_RESISTANCE_HIGH 5 +#define PORT_DETECT_OPEN_CIRCUIT 6 +#define PORT_DETECT_RESERVED_2 7 +#define PORT_DETECT_MOSFET_FAULT 8 +#define PORT_DETECT_LEGACY 9 +/* Measurment beyond clamp voltage */ +#define PORT_DETECT_CAPACITANCE_INVALID_BEYOND 10 +/* Insufficient voltage delta */ +#define PORT_DETECT_CAPACITANCE_INVALID_DELTA 11 +#define PORT_DETECT_CAPACITANCE_OUT_OF_RANGE 12 +#define POE_PLUS 0x40 +#define OPERATING_MODE 0x12 +#define OPERATING_MODE_OFF 0 +#define OPERATING_MODE_MANUAL 1 +#define OPERATING_MODE_SEMI 2 +#define OPERATING_MODE_AUTO 3 +#define OPERATING_MODE_PORT_1_MASK GENMASK(1, 0) +#define OPERATING_MODE_PORT_2_MASK GENMASK(3, 2) +#define OPERATING_MODE_PORT_3_MASK GENMASK(5, 4) +#define OPERATING_MODE_PORT_4_MASK GENMASK(7, 6) + +#define DETECT_CLASS_RESTART 0x18 +#define POWER_ENABLE 0x19 +#define TPS23861_NUM_PORTS 4 + +#define TEMPERATURE_LSB 652 /* 0.652 degrees Celsius */ +#define VOLTAGE_LSB 3662 /* 3.662 mV */ +#define SHUNT_RESISTOR_DEFAULT 255000 /* 255 mOhm */ +#define CURRENT_LSB_255 62260 /* 62.260 uA */ +#define CURRENT_LSB_250 61039 /* 61.039 uA */ +#define RESISTANCE_LSB 110966 /* 11.0966 Ohm*/ +#define RESISTANCE_LSB_LOW 157216 /* 15.7216 Ohm*/ + +struct tps23861_data { + struct regmap *regmap; + u32 shunt_resistor; + struct i2c_client *client; + struct dentry *debugfs_dir; +}; + +static struct regmap_config tps23861_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static int tps23861_read_temp(struct tps23861_data *data, long *val) +{ + unsigned int regval; + int err; + + err = regmap_read(data->regmap, TEMPERATURE, ®val); + if (err < 0) + return err; + + *val = (regval * TEMPERATURE_LSB) - 20000; + + return 0; +} + +static int tps23861_read_voltage(struct tps23861_data *data, int channel, + long *val) +{ + unsigned int regval; + int err; + + if (channel < TPS23861_NUM_PORTS) { + err = regmap_bulk_read(data->regmap, + PORT_1_VOLTAGE_LSB + channel * PORT_N_VOLTAGE_LSB_OFFSET, + ®val, 2); + } else { + err = regmap_bulk_read(data->regmap, + INPUT_VOLTAGE_LSB, + ®val, 2); + } + if (err < 0) + return err; + + *val = (FIELD_GET(VOLTAGE_CURRENT_MASK, regval) * VOLTAGE_LSB) / 1000; + + return 0; +} + +static int tps23861_read_current(struct tps23861_data *data, int channel, + long *val) +{ + unsigned int current_lsb; + unsigned int regval; + int err; + + if (data->shunt_resistor == SHUNT_RESISTOR_DEFAULT) + current_lsb = CURRENT_LSB_255; + else + current_lsb = CURRENT_LSB_250; + + err = regmap_bulk_read(data->regmap, + PORT_1_CURRENT_LSB + channel * PORT_N_CURRENT_LSB_OFFSET, + ®val, 2); + if (err < 0) + return err; + + *val = (FIELD_GET(VOLTAGE_CURRENT_MASK, regval) * current_lsb) / 1000000; + + return 0; +} + +static int tps23861_port_disable(struct tps23861_data *data, int channel) +{ + unsigned int regval = 0; + int err; + + regval |= BIT(channel + 4); + err = regmap_write(data->regmap, POWER_ENABLE, regval); + + return err; +} + +static int tps23861_port_enable(struct tps23861_data *data, int channel) +{ + unsigned int regval = 0; + int err; + + regval |= BIT(channel); + regval |= BIT(channel + 4); + err = regmap_write(data->regmap, DETECT_CLASS_RESTART, regval); + + return err; +} + +static umode_t tps23861_is_visible(const void *data, enum hwmon_sensor_types type, + u32 attr, int channel) +{ + switch (type) { + case hwmon_temp: + switch (attr) { + case hwmon_temp_input: + case hwmon_temp_label: + return 0444; + default: + return 0; + } + case hwmon_in: + switch (attr) { + case hwmon_in_input: + case hwmon_in_label: + return 0444; + case hwmon_in_enable: + return 0200; + default: + return 0; + } + case hwmon_curr: + switch (attr) { + case hwmon_curr_input: + case hwmon_curr_label: + return 0444; + default: + return 0; + } + default: + return 0; + } +} + +static int tps23861_write(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long val) +{ + struct tps23861_data *data = dev_get_drvdata(dev); + int err; + + switch (type) { + case hwmon_in: + switch (attr) { + case hwmon_in_enable: + if (val == 0) + err = tps23861_port_disable(data, channel); + else if (val == 1) + err = tps23861_port_enable(data, channel); + else + err = -EINVAL; + break; + default: + return -EOPNOTSUPP; + } + break; + default: + return -EOPNOTSUPP; + } + + return err; +} + +static int tps23861_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) +{ + struct tps23861_data *data = dev_get_drvdata(dev); + int err; + + switch (type) { + case hwmon_temp: + switch (attr) { + case hwmon_temp_input: + err = tps23861_read_temp(data, val); + break; + default: + return -EOPNOTSUPP; + } + break; + case hwmon_in: + switch (attr) { + case hwmon_in_input: + err = tps23861_read_voltage(data, channel, val); + break; + default: + return -EOPNOTSUPP; + } + break; + case hwmon_curr: + switch (attr) { + case hwmon_curr_input: + err = tps23861_read_current(data, channel, val); + break; + default: + return -EOPNOTSUPP; + } + break; + default: + return -EOPNOTSUPP; + } + + return err; +} + +static const char * const tps23861_port_label[] = { + "Port1", + "Port2", + "Port3", + "Port4", + "Input", +}; + +static int tps23861_read_string(struct device *dev, + enum hwmon_sensor_types type, + u32 attr, int channel, const char **str) +{ + switch (type) { + case hwmon_in: + case hwmon_curr: + *str = tps23861_port_label[channel]; + break; + case hwmon_temp: + *str = "Die"; + break; + default: + return -EOPNOTSUPP; + } + + return 0; +} + +static const struct hwmon_channel_info *tps23861_info[] = { + HWMON_CHANNEL_INFO(chip, + HWMON_C_REGISTER_TZ), + HWMON_CHANNEL_INFO(temp, + HWMON_T_INPUT | HWMON_T_LABEL), + HWMON_CHANNEL_INFO(in, + HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_LABEL), + HWMON_CHANNEL_INFO(curr, + HWMON_C_INPUT | HWMON_C_LABEL, + HWMON_C_INPUT | HWMON_C_LABEL, + HWMON_C_INPUT | HWMON_C_LABEL, + HWMON_C_INPUT | HWMON_C_LABEL), + NULL +}; + +static const struct hwmon_ops tps23861_hwmon_ops = { + .is_visible = tps23861_is_visible, + .write = tps23861_write, + .read = tps23861_read, + .read_string = tps23861_read_string, +}; + +static const struct hwmon_chip_info tps23861_chip_info = { + .ops = &tps23861_hwmon_ops, + .info = tps23861_info, +}; + +static char *tps23861_port_operating_mode(struct tps23861_data *data, int port) +{ + unsigned int regval; + int mode; + + regmap_read(data->regmap, OPERATING_MODE, ®val); + + switch (port) { + case 1: + mode = FIELD_GET(OPERATING_MODE_PORT_1_MASK, regval); + break; + case 2: + mode = FIELD_GET(OPERATING_MODE_PORT_2_MASK, regval); + break; + case 3: + mode = FIELD_GET(OPERATING_MODE_PORT_3_MASK, regval); + break; + case 4: + mode = FIELD_GET(OPERATING_MODE_PORT_4_MASK, regval); + break; + default: + mode = -EINVAL; + } + + switch (mode) { + case OPERATING_MODE_OFF: + return "Off"; + case OPERATING_MODE_MANUAL: + return "Manual"; + case OPERATING_MODE_SEMI: + return "Semi-Auto"; + case OPERATING_MODE_AUTO: + return "Auto"; + default: + return "Invalid"; + } +} + +static char *tps23861_port_detect_status(struct tps23861_data *data, int port) +{ + unsigned int regval; + + regmap_read(data->regmap, + PORT_1_STATUS + (port - 1), + ®val); + + switch (FIELD_GET(PORT_STATUS_DETECT_MASK, regval)) { + case PORT_DETECT_UNKNOWN: + return "Unknown device"; + case PORT_DETECT_SHORT: + return "Short circuit"; + case PORT_DETECT_RESISTANCE_LOW: + return "Too low resistance"; + case PORT_DETECT_RESISTANCE_OK: + return "Valid resistance"; + case PORT_DETECT_RESISTANCE_HIGH: + return "Too high resistance"; + case PORT_DETECT_OPEN_CIRCUIT: + return "Open circuit"; + case PORT_DETECT_MOSFET_FAULT: + return "MOSFET fault"; + case PORT_DETECT_LEGACY: + return "Legacy device"; + case PORT_DETECT_CAPACITANCE_INVALID_BEYOND: + return "Invalid capacitance, beyond clamp voltage"; + case PORT_DETECT_CAPACITANCE_INVALID_DELTA: + return "Invalid capacitance, insufficient voltage delta"; + case PORT_DETECT_CAPACITANCE_OUT_OF_RANGE: + return "Valid capacitance, outside of legacy range"; + case PORT_DETECT_RESERVED: + case PORT_DETECT_RESERVED_2: + default: + return "Invalid"; + } +} + +static char *tps23861_port_class_status(struct tps23861_data *data, int port) +{ + unsigned int regval; + + regmap_read(data->regmap, + PORT_1_STATUS + (port - 1), + ®val); + + switch (FIELD_GET(PORT_STATUS_CLASS_MASK, regval)) { + case PORT_CLASS_UNKNOWN: + return "Unknown"; + case PORT_CLASS_RESERVED: + case PORT_CLASS_0: + return "0"; + case PORT_CLASS_1: + return "1"; + case PORT_CLASS_2: + return "2"; + case PORT_CLASS_3: + return "3"; + case PORT_CLASS_4: + return "4"; + case PORT_CLASS_OVERCURRENT: + return "Overcurrent"; + case PORT_CLASS_MISMATCH: + return "Mismatch"; + default: + return "Invalid"; + } +} + +static char *tps23861_port_poe_plus_status(struct tps23861_data *data, int port) +{ + unsigned int regval; + + regmap_read(data->regmap, POE_PLUS, ®val); + + if (BIT(port + 3) & regval) + return "Yes"; + else + return "No"; +} + +static int tps23861_port_resistance(struct tps23861_data *data, int port) +{ + u16 regval; + + regmap_bulk_read(data->regmap, + PORT_1_RESISTANCE_LSB + PORT_N_RESISTANCE_LSB_OFFSET * (port - 1), + ®val, + 2); + + switch (FIELD_GET(PORT_RESISTANCE_RSN_MASK, regval)) { + case PORT_RESISTANCE_RSN_OTHER: + return (FIELD_GET(PORT_RESISTANCE_MASK, regval) * RESISTANCE_LSB) / 10000; + case PORT_RESISTANCE_RSN_LOW: + return (FIELD_GET(PORT_RESISTANCE_MASK, regval) * RESISTANCE_LSB_LOW) / 10000; + case PORT_RESISTANCE_RSN_SHORT: + case PORT_RESISTANCE_RSN_OPEN: + default: + return 0; + } +} + +static int tps23861_port_status_show(struct seq_file *s, void *data) +{ + struct tps23861_data *priv = s->private; + int i; + + for (i = 1; i < TPS23861_NUM_PORTS + 1; i++) { + seq_printf(s, "Port: \t\t%d\n", i); + seq_printf(s, "Operating mode: %s\n", tps23861_port_operating_mode(priv, i)); + seq_printf(s, "Detected: \t%s\n", tps23861_port_detect_status(priv, i)); + seq_printf(s, "Class: \t\t%s\n", tps23861_port_class_status(priv, i)); + seq_printf(s, "PoE Plus: \t%s\n", tps23861_port_poe_plus_status(priv, i)); + seq_printf(s, "Resistance: \t%d\n", tps23861_port_resistance(priv, i)); + seq_putc(s, '\n'); + } + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(tps23861_port_status); + +static void tps23861_init_debugfs(struct tps23861_data *data) +{ + data->debugfs_dir = debugfs_create_dir(data->client->name, NULL); + + debugfs_create_file("port_status", + 0400, + data->debugfs_dir, + data, + &tps23861_port_status_fops); +} + +static int tps23861_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct tps23861_data *data; + struct device *hwmon_dev; + u32 shunt_resistor; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->client = client; + i2c_set_clientdata(client, data); + + data->regmap = devm_regmap_init_i2c(client, &tps23861_regmap_config); + if (IS_ERR(data->regmap)) { + dev_err(dev, "failed to allocate register map\n"); + return PTR_ERR(data->regmap); + } + + if (!of_property_read_u32(dev->of_node, "shunt-resistor-micro-ohms", &shunt_resistor)) + data->shunt_resistor = shunt_resistor; + else + data->shunt_resistor = SHUNT_RESISTOR_DEFAULT; + + hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, + data, &tps23861_chip_info, + NULL); + if (IS_ERR(hwmon_dev)) + return PTR_ERR(hwmon_dev); + + tps23861_init_debugfs(data); + + return 0; +} + +static int tps23861_remove(struct i2c_client *client) +{ + struct tps23861_data *data = i2c_get_clientdata(client); + + debugfs_remove_recursive(data->debugfs_dir); + + return 0; +} + +static const struct of_device_id __maybe_unused tps23861_of_match[] = { + { .compatible = "ti,tps23861", }, + { }, +}; +MODULE_DEVICE_TABLE(of, tps23861_of_match); + +static struct i2c_driver tps23861_driver = { + .probe_new = tps23861_probe, + .remove = tps23861_remove, + .driver = { + .name = "tps23861", + .of_match_table = of_match_ptr(tps23861_of_match), + }, +}; +module_i2c_driver(tps23861_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Robert Marko <robert.marko@sartura.hr>"); +MODULE_DESCRIPTION("TI TPS23861 PoE PSE");
Add basic monitoring support as well as port on/off control for Texas Instruments TPS23861 PoE PSE IC. Signed-off-by: Robert Marko <robert.marko@sartura.hr> Cc: Luka Perkov <luka.perkov@sartura.hr> --- Changes in v4: * Add documentation * Correct of_property_read_u32() return check * Drop useless and incorrect debugfs return check Changes in v3: * Leave only standard values in hwmon hwmon * Drop custom sysfs entries * Use debugfs to provide non standard debug information * Add temperature label * Use hwmon_in_enable to enable/disable ports Changes in v2: * Convert to devm_hwmon_device_register_with_info() * Change license Documentation/hwmon/index.rst | 1 + Documentation/hwmon/tps23861.rst | 41 +++ drivers/hwmon/Kconfig | 11 + drivers/hwmon/Makefile | 1 + drivers/hwmon/tps23861.c | 601 +++++++++++++++++++++++++++++++ 5 files changed, 655 insertions(+) create mode 100644 Documentation/hwmon/tps23861.rst create mode 100644 drivers/hwmon/tps23861.c