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hwmon: (ina238) Add support for SQ52206
Add support for SQ52206 to the Ina238 driver. Add registers, increase compatibility, add compatibility programs for multiple chips. Signed-off-by: Wenliang Yan <wenliang202407@163.com> Link: https://lore.kernel.org/r/20250506053741.4837-3-wenliang202407@163.com [groeck: Fixed checkpatch issues (alignment, {} placing)] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Wenliang Yan
Guenter Roeck
parent
00ca54bee4
commit
6daaf15a11
2 changed files with 122 additions and 9 deletions
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@ -14,6 +14,12 @@ Supported chips:
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Datasheet:
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https://www.ti.com/lit/gpn/ina238
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* Silergy SQ52206
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Prefix: 'SQ52206'
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Addresses: I2C 0x40 - 0x4f
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Author: Nathan Rossi <nathan.rossi@digi.com>
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Description
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@ -54,3 +60,12 @@ temp1_input Die temperature measurement (mC)
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temp1_max Maximum die temperature threshold (mC)
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temp1_max_alarm Maximum die temperature alarm
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======================= =======================================================
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Additional sysfs entries for sq52206
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------------------------------------
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======================= =======================================================
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energy1_input Energy measurement (mJ)
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power1_input_highest Peak Power (uW)
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======================= =======================================================
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@ -21,11 +21,14 @@
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#define INA238_CONFIG 0x0
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#define INA238_ADC_CONFIG 0x1
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#define INA238_SHUNT_CALIBRATION 0x2
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#define SQ52206_SHUNT_TEMPCO 0x3
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#define INA238_SHUNT_VOLTAGE 0x4
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#define INA238_BUS_VOLTAGE 0x5
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#define INA238_DIE_TEMP 0x6
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#define INA238_CURRENT 0x7
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#define INA238_POWER 0x8
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#define SQ52206_ENERGY 0x9
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#define SQ52206_CHARGE 0xa
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#define INA238_DIAG_ALERT 0xb
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#define INA238_SHUNT_OVER_VOLTAGE 0xc
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#define INA238_SHUNT_UNDER_VOLTAGE 0xd
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@ -33,9 +36,12 @@
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#define INA238_BUS_UNDER_VOLTAGE 0xf
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#define INA238_TEMP_LIMIT 0x10
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#define INA238_POWER_LIMIT 0x11
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#define SQ52206_POWER_PEAK 0x20
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#define INA238_DEVICE_ID 0x3f /* not available on INA237 */
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#define INA238_CONFIG_ADCRANGE BIT(4)
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#define SQ52206_CONFIG_ADCRANGE_HIGH BIT(4)
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#define SQ52206_CONFIG_ADCRANGE_LOW BIT(3)
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#define INA238_DIAG_ALERT_TMPOL BIT(7)
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#define INA238_DIAG_ALERT_SHNTOL BIT(6)
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@ -44,12 +50,13 @@
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#define INA238_DIAG_ALERT_BUSUL BIT(3)
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#define INA238_DIAG_ALERT_POL BIT(2)
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#define INA238_REGISTERS 0x11
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#define INA238_REGISTERS 0x20
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#define INA238_RSHUNT_DEFAULT 10000 /* uOhm */
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/* Default configuration of device on reset. */
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#define INA238_CONFIG_DEFAULT 0
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#define SQ52206_CONFIG_DEFAULT 0x0005
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/* 16 sample averaging, 1052us conversion time, continuous mode */
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#define INA238_ADC_CONFIG_DEFAULT 0xfb6a
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/* Configure alerts to be based on averaged value (SLOWALERT) */
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@ -87,14 +94,19 @@
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* shunt = 0x4000 / (819.2 * 10^6) / 0.001 = 20000 uOhms (with 1mA/lsb)
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*
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* Current (mA) = register value * 20000 / rshunt / 4 * gain
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* Power (W) = 0.2 * register value * 20000 / rshunt / 4 * gain
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* Power (mW) = 0.2 * register value * 20000 / rshunt / 4 * gain
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* (Specific for SQ52206)
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* Power (mW) = 0.24 * register value * 20000 / rshunt / 4 * gain
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* Energy (mJ) = 16 * 0.24 * register value * 20000 / rshunt / 4 * gain
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*/
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#define INA238_CALIBRATION_VALUE 16384
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#define INA238_FIXED_SHUNT 20000
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#define INA238_SHUNT_VOLTAGE_LSB 5 /* 5 uV/lsb */
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#define INA238_BUS_VOLTAGE_LSB 3125 /* 3.125 mV/lsb */
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#define INA238_DIE_TEMP_LSB 125 /* 125 mC/lsb */
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#define INA238_DIE_TEMP_LSB 1250000 /* 125.0000 mC/lsb */
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#define SQ52206_BUS_VOLTAGE_LSB 3750 /* 3.75 mV/lsb */
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#define SQ52206_DIE_TEMP_LSB 78125 /* 7.8125 mC/lsb */
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static const struct regmap_config ina238_regmap_config = {
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.max_register = INA238_REGISTERS,
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@ -102,7 +114,7 @@ static const struct regmap_config ina238_regmap_config = {
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.val_bits = 16,
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};
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enum ina238_ids { ina238, ina237 };
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enum ina238_ids { ina238, ina237, sq52206 };
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struct ina238_config {
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bool has_power_highest; /* chip detection power peak */
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@ -142,6 +154,15 @@ static const struct ina238_config ina238_config[] = {
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.bus_voltage_lsb = INA238_BUS_VOLTAGE_LSB,
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.temp_lsb = INA238_DIE_TEMP_LSB,
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},
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[sq52206] = {
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.has_energy = true,
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.has_power_highest = true,
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.temp_shift = 0,
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.power_calculate_factor = 24,
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.config_default = SQ52206_CONFIG_DEFAULT,
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.bus_voltage_lsb = SQ52206_BUS_VOLTAGE_LSB,
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.temp_lsb = SQ52206_DIE_TEMP_LSB,
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},
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};
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static int ina238_read_reg24(const struct i2c_client *client, u8 reg, u32 *val)
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@ -160,6 +181,24 @@ static int ina238_read_reg24(const struct i2c_client *client, u8 reg, u32 *val)
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return 0;
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}
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static int ina238_read_reg40(const struct i2c_client *client, u8 reg, u64 *val)
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{
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u8 data[5];
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u32 low;
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int err;
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/* 40-bit register read */
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err = i2c_smbus_read_i2c_block_data(client, reg, 5, data);
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if (err < 0)
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return err;
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if (err != 5)
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return -EIO;
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low = (data[1] << 24) | (data[2] << 16) | (data[3] << 8) | data[4];
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*val = ((long long)data[0] << 32) | low;
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return 0;
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}
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static int ina238_read_in(struct device *dev, u32 attr, int channel,
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long *val)
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{
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@ -330,6 +369,17 @@ static int ina238_read_power(struct device *dev, u32 attr, long *val)
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if (err)
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return err;
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/* Fixed 1mA lsb, scaled by 1000000 to have result in uW */
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power = div_u64(regval * 1000ULL * INA238_FIXED_SHUNT *
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data->gain, 20 * data->rshunt);
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/* Clamp value to maximum value of long */
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*val = clamp_val(power, 0, LONG_MAX);
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break;
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case hwmon_power_input_highest:
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err = ina238_read_reg24(data->client, SQ52206_POWER_PEAK, ®val);
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if (err)
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return err;
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/* Fixed 1mA lsb, scaled by 1000000 to have result in uW */
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power = div_u64(regval * 1000ULL * INA238_FIXED_SHUNT *
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data->gain, 20 * data->rshunt);
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@ -437,6 +487,25 @@ static int ina238_write_temp(struct device *dev, u32 attr, long val)
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return regmap_write(data->regmap, INA238_TEMP_LIMIT, regval);
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}
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static ssize_t energy1_input_show(struct device *dev,
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struct device_attribute *da, char *buf)
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{
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struct ina238_data *data = dev_get_drvdata(dev);
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int ret;
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u64 regval;
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u64 energy;
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ret = ina238_read_reg40(data->client, SQ52206_ENERGY, ®val);
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if (ret)
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return ret;
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/* result in mJ */
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energy = div_u64(regval * INA238_FIXED_SHUNT * data->gain * 16 *
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data->config->power_calculate_factor, 4 * 100 * data->rshunt);
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return sysfs_emit(buf, "%llu\n", energy);
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}
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static int ina238_read(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long *val)
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{
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@ -456,7 +525,7 @@ static int ina238_read(struct device *dev, enum hwmon_sensor_types type,
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}
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static int ina238_write(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long val)
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u32 attr, int channel, long val)
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{
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struct ina238_data *data = dev_get_drvdata(dev);
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int err;
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@ -486,6 +555,9 @@ static umode_t ina238_is_visible(const void *drvdata,
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enum hwmon_sensor_types type,
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u32 attr, int channel)
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{
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const struct ina238_data *data = drvdata;
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bool has_power_highest = data->config->has_power_highest;
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switch (type) {
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case hwmon_in:
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switch (attr) {
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@ -513,6 +585,10 @@ static umode_t ina238_is_visible(const void *drvdata,
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return 0444;
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case hwmon_power_max:
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return 0644;
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case hwmon_power_input_highest:
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if (has_power_highest)
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return 0444;
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return 0;
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default:
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return 0;
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}
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@ -546,7 +622,8 @@ static const struct hwmon_channel_info * const ina238_info[] = {
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HWMON_C_INPUT),
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HWMON_CHANNEL_INFO(power,
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/* 0: power */
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HWMON_P_INPUT | HWMON_P_MAX | HWMON_P_MAX_ALARM),
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HWMON_P_INPUT | HWMON_P_MAX |
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HWMON_P_MAX_ALARM | HWMON_P_INPUT_HIGHEST),
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HWMON_CHANNEL_INFO(temp,
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/* 0: die temperature */
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HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_ALARM),
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@ -564,6 +641,15 @@ static const struct hwmon_chip_info ina238_chip_info = {
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.info = ina238_info,
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};
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/* energy attributes are 5 bytes wide so we need u64 */
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static DEVICE_ATTR_RO(energy1_input);
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static struct attribute *ina238_attrs[] = {
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&dev_attr_energy1_input.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(ina238);
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static int ina238_probe(struct i2c_client *client)
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{
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struct ina2xx_platform_data *pdata = dev_get_platdata(&client->dev);
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@ -604,15 +690,21 @@ static int ina238_probe(struct i2c_client *client)
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/* load shunt gain value */
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if (device_property_read_u32(dev, "ti,shunt-gain", &data->gain) < 0)
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data->gain = 4; /* Default of ADCRANGE = 0 */
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if (data->gain != 1 && data->gain != 4) {
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if (data->gain != 1 && data->gain != 2 && data->gain != 4) {
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dev_err(dev, "invalid shunt gain value %u\n", data->gain);
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return -EINVAL;
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}
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/* Setup CONFIG register */
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config = data->config->config_default;
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if (data->gain == 1)
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if (chip == sq52206) {
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if (data->gain == 1)
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config |= SQ52206_CONFIG_ADCRANGE_HIGH; /* ADCRANGE = 10/11 is /1 */
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else if (data->gain == 2)
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config |= SQ52206_CONFIG_ADCRANGE_LOW; /* ADCRANGE = 01 is /2 */
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} else if (data->gain == 1) {
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config |= INA238_CONFIG_ADCRANGE; /* ADCRANGE = 1 is /1 */
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}
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ret = regmap_write(data->regmap, INA238_CONFIG, config);
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if (ret < 0) {
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dev_err(dev, "error configuring the device: %d\n", ret);
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@ -645,7 +737,8 @@ static int ina238_probe(struct i2c_client *client)
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hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data,
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&ina238_chip_info,
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NULL);
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data->config->has_energy ?
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ina238_groups : NULL);
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if (IS_ERR(hwmon_dev))
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return PTR_ERR(hwmon_dev);
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@ -658,6 +751,7 @@ static int ina238_probe(struct i2c_client *client)
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static const struct i2c_device_id ina238_id[] = {
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{ "ina237", ina237 },
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{ "ina238", ina238 },
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{ "sq52206", sq52206 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, ina238_id);
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@ -671,6 +765,10 @@ static const struct of_device_id __maybe_unused ina238_of_match[] = {
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.compatible = "ti,ina238",
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.data = (void *)ina238
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},
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{
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.compatible = "silergy,sq52206",
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.data = (void *)sq52206
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},
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{ }
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};
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MODULE_DEVICE_TABLE(of, ina238_of_match);
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