diff options
Diffstat (limited to 'drivers/hwmon/ina238.c')
| -rw-r--r-- | drivers/hwmon/ina238.c | 214 |
1 files changed, 180 insertions, 34 deletions
diff --git a/drivers/hwmon/ina238.c b/drivers/hwmon/ina238.c index 2d9f12f68d50..a4a41742786b 100644 --- a/drivers/hwmon/ina238.c +++ b/drivers/hwmon/ina238.c @@ -21,11 +21,14 @@ #define INA238_CONFIG 0x0 #define INA238_ADC_CONFIG 0x1 #define INA238_SHUNT_CALIBRATION 0x2 +#define SQ52206_SHUNT_TEMPCO 0x3 #define INA238_SHUNT_VOLTAGE 0x4 #define INA238_BUS_VOLTAGE 0x5 #define INA238_DIE_TEMP 0x6 #define INA238_CURRENT 0x7 #define INA238_POWER 0x8 +#define SQ52206_ENERGY 0x9 +#define SQ52206_CHARGE 0xa #define INA238_DIAG_ALERT 0xb #define INA238_SHUNT_OVER_VOLTAGE 0xc #define INA238_SHUNT_UNDER_VOLTAGE 0xd @@ -33,9 +36,12 @@ #define INA238_BUS_UNDER_VOLTAGE 0xf #define INA238_TEMP_LIMIT 0x10 #define INA238_POWER_LIMIT 0x11 +#define SQ52206_POWER_PEAK 0x20 #define INA238_DEVICE_ID 0x3f /* not available on INA237 */ #define INA238_CONFIG_ADCRANGE BIT(4) +#define SQ52206_CONFIG_ADCRANGE_HIGH BIT(4) +#define SQ52206_CONFIG_ADCRANGE_LOW BIT(3) #define INA238_DIAG_ALERT_TMPOL BIT(7) #define INA238_DIAG_ALERT_SHNTOL BIT(6) @@ -44,12 +50,13 @@ #define INA238_DIAG_ALERT_BUSUL BIT(3) #define INA238_DIAG_ALERT_POL BIT(2) -#define INA238_REGISTERS 0x11 +#define INA238_REGISTERS 0x20 #define INA238_RSHUNT_DEFAULT 10000 /* uOhm */ /* Default configuration of device on reset. */ #define INA238_CONFIG_DEFAULT 0 +#define SQ52206_CONFIG_DEFAULT 0x0005 /* 16 sample averaging, 1052us conversion time, continuous mode */ #define INA238_ADC_CONFIG_DEFAULT 0xfb6a /* Configure alerts to be based on averaged value (SLOWALERT) */ @@ -87,14 +94,19 @@ * shunt = 0x4000 / (819.2 * 10^6) / 0.001 = 20000 uOhms (with 1mA/lsb) * * Current (mA) = register value * 20000 / rshunt / 4 * gain - * Power (W) = 0.2 * register value * 20000 / rshunt / 4 * gain + * Power (mW) = 0.2 * register value * 20000 / rshunt / 4 * gain + * (Specific for SQ52206) + * Power (mW) = 0.24 * register value * 20000 / rshunt / 4 * gain + * Energy (mJ) = 16 * 0.24 * register value * 20000 / rshunt / 4 * gain */ #define INA238_CALIBRATION_VALUE 16384 #define INA238_FIXED_SHUNT 20000 #define INA238_SHUNT_VOLTAGE_LSB 5 /* 5 uV/lsb */ #define INA238_BUS_VOLTAGE_LSB 3125 /* 3.125 mV/lsb */ -#define INA238_DIE_TEMP_LSB 125 /* 125 mC/lsb */ +#define INA238_DIE_TEMP_LSB 1250000 /* 125.0000 mC/lsb */ +#define SQ52206_BUS_VOLTAGE_LSB 3750 /* 3.75 mV/lsb */ +#define SQ52206_DIE_TEMP_LSB 78125 /* 7.8125 mC/lsb */ static const struct regmap_config ina238_regmap_config = { .max_register = INA238_REGISTERS, @@ -102,7 +114,20 @@ static const struct regmap_config ina238_regmap_config = { .val_bits = 16, }; +enum ina238_ids { ina238, ina237, sq52206 }; + +struct ina238_config { + bool has_power_highest; /* chip detection power peak */ + bool has_energy; /* chip detection energy */ + u8 temp_shift; /* fixed parameters for temp calculate */ + u32 power_calculate_factor; /* fixed parameters for power calculate */ + u16 config_default; /* Power-on default state */ + int bus_voltage_lsb; /* use for temperature calculate, uV/lsb */ + int temp_lsb; /* use for temperature calculate */ +}; + struct ina238_data { + const struct ina238_config *config; struct i2c_client *client; struct mutex config_lock; struct regmap *regmap; @@ -110,6 +135,36 @@ struct ina238_data { int gain; }; +static const struct ina238_config ina238_config[] = { + [ina238] = { + .has_energy = false, + .has_power_highest = false, + .temp_shift = 4, + .power_calculate_factor = 20, + .config_default = INA238_CONFIG_DEFAULT, + .bus_voltage_lsb = INA238_BUS_VOLTAGE_LSB, + .temp_lsb = INA238_DIE_TEMP_LSB, + }, + [ina237] = { + .has_energy = false, + .has_power_highest = false, + .temp_shift = 4, + .power_calculate_factor = 20, + .config_default = INA238_CONFIG_DEFAULT, + .bus_voltage_lsb = INA238_BUS_VOLTAGE_LSB, + .temp_lsb = INA238_DIE_TEMP_LSB, + }, + [sq52206] = { + .has_energy = true, + .has_power_highest = true, + .temp_shift = 0, + .power_calculate_factor = 24, + .config_default = SQ52206_CONFIG_DEFAULT, + .bus_voltage_lsb = SQ52206_BUS_VOLTAGE_LSB, + .temp_lsb = SQ52206_DIE_TEMP_LSB, + }, +}; + static int ina238_read_reg24(const struct i2c_client *client, u8 reg, u32 *val) { u8 data[3]; @@ -126,6 +181,24 @@ static int ina238_read_reg24(const struct i2c_client *client, u8 reg, u32 *val) return 0; } +static int ina238_read_reg40(const struct i2c_client *client, u8 reg, u64 *val) +{ + u8 data[5]; + u32 low; + int err; + + /* 40-bit register read */ + err = i2c_smbus_read_i2c_block_data(client, reg, 5, data); + if (err < 0) + return err; + if (err != 5) + return -EIO; + low = (data[1] << 24) | (data[2] << 16) | (data[3] << 8) | data[4]; + *val = ((long long)data[0] << 32) | low; + + return 0; +} + static int ina238_read_in(struct device *dev, u32 attr, int channel, long *val) { @@ -197,10 +270,10 @@ static int ina238_read_in(struct device *dev, u32 attr, int channel, regval = (s16)regval; if (channel == 0) /* gain of 1 -> LSB / 4 */ - *val = (regval * INA238_SHUNT_VOLTAGE_LSB) / - (1000 * (4 - data->gain + 1)); + *val = (regval * INA238_SHUNT_VOLTAGE_LSB) * + data->gain / (1000 * 4); else - *val = (regval * INA238_BUS_VOLTAGE_LSB) / 1000; + *val = (regval * data->config->bus_voltage_lsb) / 1000; break; case hwmon_in_max_alarm: case hwmon_in_min_alarm: @@ -225,8 +298,8 @@ static int ina238_write_in(struct device *dev, u32 attr, int channel, case 0: /* signed value, clamp to max range +/-163 mV */ regval = clamp_val(val, -163, 163); - regval = (regval * 1000 * (4 - data->gain + 1)) / - INA238_SHUNT_VOLTAGE_LSB; + regval = (regval * 1000 * 4) / + (INA238_SHUNT_VOLTAGE_LSB * data->gain); regval = clamp_val(regval, S16_MIN, S16_MAX); switch (attr) { @@ -242,7 +315,7 @@ static int ina238_write_in(struct device *dev, u32 attr, int channel, case 1: /* signed value, positive values only. Clamp to max 102.396 V */ regval = clamp_val(val, 0, 102396); - regval = (regval * 1000) / INA238_BUS_VOLTAGE_LSB; + regval = (regval * 1000) / data->config->bus_voltage_lsb; regval = clamp_val(regval, 0, S16_MAX); switch (attr) { @@ -297,8 +370,19 @@ static int ina238_read_power(struct device *dev, u32 attr, long *val) return err; /* Fixed 1mA lsb, scaled by 1000000 to have result in uW */ - power = div_u64(regval * 1000ULL * INA238_FIXED_SHUNT * - data->gain, 20 * data->rshunt); + power = div_u64(regval * 1000ULL * INA238_FIXED_SHUNT * data->gain * + data->config->power_calculate_factor, 4 * 100 * data->rshunt); + /* Clamp value to maximum value of long */ + *val = clamp_val(power, 0, LONG_MAX); + break; + case hwmon_power_input_highest: + err = ina238_read_reg24(data->client, SQ52206_POWER_PEAK, ®val); + if (err) + return err; + + /* Fixed 1mA lsb, scaled by 1000000 to have result in uW */ + power = div_u64(regval * 1000ULL * INA238_FIXED_SHUNT * data->gain * + data->config->power_calculate_factor, 4 * 100 * data->rshunt); /* Clamp value to maximum value of long */ *val = clamp_val(power, 0, LONG_MAX); break; @@ -311,8 +395,8 @@ static int ina238_read_power(struct device *dev, u32 attr, long *val) * Truncated 24-bit compare register, lower 8-bits are * truncated. Same conversion to/from uW as POWER register. */ - power = div_u64((regval << 8) * 1000ULL * INA238_FIXED_SHUNT * - data->gain, 20 * data->rshunt); + power = div_u64((regval << 8) * 1000ULL * INA238_FIXED_SHUNT * data->gain * + data->config->power_calculate_factor, 4 * 100 * data->rshunt); /* Clamp value to maximum value of long */ *val = clamp_val(power, 0, LONG_MAX); break; @@ -344,8 +428,8 @@ static int ina238_write_power(struct device *dev, u32 attr, long val) * register. */ regval = clamp_val(val, 0, LONG_MAX); - regval = div_u64(val * 20ULL * data->rshunt, - 1000ULL * INA238_FIXED_SHUNT * data->gain); + regval = div_u64(val * 4 * 100 * data->rshunt, data->config->power_calculate_factor * + 1000ULL * INA238_FIXED_SHUNT * data->gain); regval = clamp_val(regval >> 8, 0, U16_MAX); return regmap_write(data->regmap, INA238_POWER_LIMIT, regval); @@ -362,17 +446,17 @@ static int ina238_read_temp(struct device *dev, u32 attr, long *val) err = regmap_read(data->regmap, INA238_DIE_TEMP, ®val); if (err) return err; - - /* Signed, bits 15-4 of register, result in mC */ - *val = ((s16)regval >> 4) * INA238_DIE_TEMP_LSB; + /* Signed, result in mC */ + *val = div_s64(((s64)((s16)regval) >> data->config->temp_shift) * + (s64)data->config->temp_lsb, 10000); break; case hwmon_temp_max: err = regmap_read(data->regmap, INA238_TEMP_LIMIT, ®val); if (err) return err; - - /* Signed, bits 15-4 of register, result in mC */ - *val = ((s16)regval >> 4) * INA238_DIE_TEMP_LSB; + /* Signed, result in mC */ + *val = div_s64(((s64)((s16)regval) >> data->config->temp_shift) * + (s64)data->config->temp_lsb, 10000); break; case hwmon_temp_max_alarm: err = regmap_read(data->regmap, INA238_DIAG_ALERT, ®val); @@ -396,13 +480,33 @@ static int ina238_write_temp(struct device *dev, u32 attr, long val) if (attr != hwmon_temp_max) return -EOPNOTSUPP; - /* Signed, bits 15-4 of register */ - regval = (val / INA238_DIE_TEMP_LSB) << 4; - regval = clamp_val(regval, S16_MIN, S16_MAX) & 0xfff0; + /* Signed */ + regval = clamp_val(val, -40000, 125000); + regval = div_s64(val * 10000, data->config->temp_lsb) << data->config->temp_shift; + regval = clamp_val(regval, S16_MIN, S16_MAX) & (0xffff << data->config->temp_shift); return regmap_write(data->regmap, INA238_TEMP_LIMIT, regval); } +static ssize_t energy1_input_show(struct device *dev, + struct device_attribute *da, char *buf) +{ + struct ina238_data *data = dev_get_drvdata(dev); + int ret; + u64 regval; + u64 energy; + + ret = ina238_read_reg40(data->client, SQ52206_ENERGY, ®val); + if (ret) + return ret; + + /* result in mJ */ + energy = div_u64(regval * INA238_FIXED_SHUNT * data->gain * 16 * + data->config->power_calculate_factor, 4 * 100 * data->rshunt); + + return sysfs_emit(buf, "%llu\n", energy); +} + static int ina238_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { @@ -422,7 +526,7 @@ static int ina238_read(struct device *dev, enum hwmon_sensor_types type, } static int ina238_write(struct device *dev, enum hwmon_sensor_types type, - u32 attr, int channel, long val) + u32 attr, int channel, long val) { struct ina238_data *data = dev_get_drvdata(dev); int err; @@ -452,6 +556,9 @@ static umode_t ina238_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, int channel) { + const struct ina238_data *data = drvdata; + bool has_power_highest = data->config->has_power_highest; + switch (type) { case hwmon_in: switch (attr) { @@ -479,6 +586,10 @@ static umode_t ina238_is_visible(const void *drvdata, return 0444; case hwmon_power_max: return 0644; + case hwmon_power_input_highest: + if (has_power_highest) + return 0444; + return 0; default: return 0; } @@ -512,7 +623,8 @@ static const struct hwmon_channel_info * const ina238_info[] = { HWMON_C_INPUT), HWMON_CHANNEL_INFO(power, /* 0: power */ - HWMON_P_INPUT | HWMON_P_MAX | HWMON_P_MAX_ALARM), + HWMON_P_INPUT | HWMON_P_MAX | + HWMON_P_MAX_ALARM | HWMON_P_INPUT_HIGHEST), HWMON_CHANNEL_INFO(temp, /* 0: die temperature */ HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_ALARM), @@ -530,20 +642,35 @@ static const struct hwmon_chip_info ina238_chip_info = { .info = ina238_info, }; +/* energy attributes are 5 bytes wide so we need u64 */ +static DEVICE_ATTR_RO(energy1_input); + +static struct attribute *ina238_attrs[] = { + &dev_attr_energy1_input.attr, + NULL, +}; +ATTRIBUTE_GROUPS(ina238); + static int ina238_probe(struct i2c_client *client) { struct ina2xx_platform_data *pdata = dev_get_platdata(&client->dev); struct device *dev = &client->dev; struct device *hwmon_dev; struct ina238_data *data; + enum ina238_ids chip; int config; int ret; + chip = (uintptr_t)i2c_get_match_data(client); + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; data->client = client; + /* set the device type */ + data->config = &ina238_config[chip]; + mutex_init(&data->config_lock); data->regmap = devm_regmap_init_i2c(client, &ina238_regmap_config); @@ -564,15 +691,21 @@ static int ina238_probe(struct i2c_client *client) /* load shunt gain value */ if (device_property_read_u32(dev, "ti,shunt-gain", &data->gain) < 0) data->gain = 4; /* Default of ADCRANGE = 0 */ - if (data->gain != 1 && data->gain != 4) { + if (data->gain != 1 && data->gain != 2 && data->gain != 4) { dev_err(dev, "invalid shunt gain value %u\n", data->gain); return -EINVAL; } /* Setup CONFIG register */ - config = INA238_CONFIG_DEFAULT; - if (data->gain == 1) + config = data->config->config_default; + if (chip == sq52206) { + if (data->gain == 1) + config |= SQ52206_CONFIG_ADCRANGE_HIGH; /* ADCRANGE = 10/11 is /1 */ + else if (data->gain == 2) + config |= SQ52206_CONFIG_ADCRANGE_LOW; /* ADCRANGE = 01 is /2 */ + } else if (data->gain == 1) { config |= INA238_CONFIG_ADCRANGE; /* ADCRANGE = 1 is /1 */ + } ret = regmap_write(data->regmap, INA238_CONFIG, config); if (ret < 0) { dev_err(dev, "error configuring the device: %d\n", ret); @@ -605,7 +738,8 @@ static int ina238_probe(struct i2c_client *client) hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data, &ina238_chip_info, - NULL); + data->config->has_energy ? + ina238_groups : NULL); if (IS_ERR(hwmon_dev)) return PTR_ERR(hwmon_dev); @@ -616,15 +750,27 @@ static int ina238_probe(struct i2c_client *client) } static const struct i2c_device_id ina238_id[] = { - { "ina238" }, + { "ina237", ina237 }, + { "ina238", ina238 }, + { "sq52206", sq52206 }, { } }; MODULE_DEVICE_TABLE(i2c, ina238_id); static const struct of_device_id __maybe_unused ina238_of_match[] = { - { .compatible = "ti,ina237" }, - { .compatible = "ti,ina238" }, - { }, + { + .compatible = "ti,ina237", + .data = (void *)ina237 + }, + { + .compatible = "ti,ina238", + .data = (void *)ina238 + }, + { + .compatible = "silergy,sq52206", + .data = (void *)sq52206 + }, + { } }; MODULE_DEVICE_TABLE(of, ina238_of_match); |