diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/ina3221.c | 67 |
1 files changed, 66 insertions, 1 deletions
diff --git a/drivers/hwmon/ina3221.c b/drivers/hwmon/ina3221.c index e6f43df0435c..74d39d212931 100644 --- a/drivers/hwmon/ina3221.c +++ b/drivers/hwmon/ina3221.c @@ -22,6 +22,7 @@ #include <linux/of.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> +#include <linux/util_macros.h> #define INA3221_DRIVER_NAME "ina3221" @@ -51,6 +52,9 @@ #define INA3221_CONFIG_VBUS_CT_SHIFT 6 #define INA3221_CONFIG_VBUS_CT_MASK GENMASK(8, 6) #define INA3221_CONFIG_VBUS_CT(x) (((x) & GENMASK(8, 6)) >> 6) +#define INA3221_CONFIG_AVG_SHIFT 9 +#define INA3221_CONFIG_AVG_MASK GENMASK(11, 9) +#define INA3221_CONFIG_AVG(x) (((x) & GENMASK(11, 9)) >> 9) #define INA3221_CONFIG_CHs_EN_MASK GENMASK(14, 12) #define INA3221_CONFIG_CHx_EN(x) BIT(14 - (x)) @@ -135,17 +139,24 @@ static const u16 ina3221_conv_time[] = { 140, 204, 332, 588, 1100, 2116, 4156, 8244, }; +/* Lookup table for number of samples using in averaging mode */ +static const int ina3221_avg_samples[] = { + 1, 4, 16, 64, 128, 256, 512, 1024, +}; + static inline int ina3221_wait_for_data(struct ina3221_data *ina) { u32 channels = hweight16(ina->reg_config & INA3221_CONFIG_CHs_EN_MASK); u32 vbus_ct_idx = INA3221_CONFIG_VBUS_CT(ina->reg_config); u32 vsh_ct_idx = INA3221_CONFIG_VSH_CT(ina->reg_config); + u32 samples_idx = INA3221_CONFIG_AVG(ina->reg_config); + u32 samples = ina3221_avg_samples[samples_idx]; u32 vbus_ct = ina3221_conv_time[vbus_ct_idx]; u32 vsh_ct = ina3221_conv_time[vsh_ct_idx]; u32 wait, cvrf; /* Calculate total conversion time */ - wait = channels * (vbus_ct + vsh_ct); + wait = channels * (vbus_ct + vsh_ct) * samples; /* Polling the CVRF bit to make sure read data is ready */ return regmap_field_read_poll_timeout(ina->fields[F_CVRF], @@ -176,6 +187,21 @@ static const u8 ina3221_in_reg[] = { INA3221_SHUNT3, }; +static int ina3221_read_chip(struct device *dev, u32 attr, long *val) +{ + struct ina3221_data *ina = dev_get_drvdata(dev); + int regval; + + switch (attr) { + case hwmon_chip_samples: + regval = INA3221_CONFIG_AVG(ina->reg_config); + *val = ina3221_avg_samples[regval]; + return 0; + default: + return -EOPNOTSUPP; + } +} + static int ina3221_read_in(struct device *dev, u32 attr, int channel, long *val) { const bool is_shunt = channel > INA3221_CHANNEL3; @@ -279,6 +305,30 @@ static int ina3221_read_curr(struct device *dev, u32 attr, } } +static int ina3221_write_chip(struct device *dev, u32 attr, long val) +{ + struct ina3221_data *ina = dev_get_drvdata(dev); + int ret, idx; + + switch (attr) { + case hwmon_chip_samples: + idx = find_closest(val, ina3221_avg_samples, + ARRAY_SIZE(ina3221_avg_samples)); + + ret = regmap_update_bits(ina->regmap, INA3221_CONFIG, + INA3221_CONFIG_AVG_MASK, + idx << INA3221_CONFIG_AVG_SHIFT); + if (ret) + return ret; + + /* Update reg_config accordingly */ + return regmap_read(ina->regmap, INA3221_CONFIG, + &ina->reg_config); + default: + return -EOPNOTSUPP; + } +} + static int ina3221_write_curr(struct device *dev, u32 attr, int channel, long val) { @@ -361,6 +411,9 @@ static int ina3221_read(struct device *dev, enum hwmon_sensor_types type, mutex_lock(&ina->lock); switch (type) { + case hwmon_chip: + ret = ina3221_read_chip(dev, attr, val); + break; case hwmon_in: /* 0-align channel ID */ ret = ina3221_read_in(dev, attr, channel - 1, val); @@ -387,6 +440,9 @@ static int ina3221_write(struct device *dev, enum hwmon_sensor_types type, mutex_lock(&ina->lock); switch (type) { + case hwmon_chip: + ret = ina3221_write_chip(dev, attr, val); + break; case hwmon_in: /* 0-align channel ID */ ret = ina3221_write_enable(dev, channel - 1, val); @@ -423,6 +479,13 @@ static umode_t ina3221_is_visible(const void *drvdata, const struct ina3221_input *input = NULL; switch (type) { + case hwmon_chip: + switch (attr) { + case hwmon_chip_samples: + return 0644; + default: + return 0; + } case hwmon_in: /* Ignore in0_ */ if (channel == 0) @@ -463,6 +526,8 @@ static umode_t ina3221_is_visible(const void *drvdata, HWMON_C_MAX | HWMON_C_MAX_ALARM) static const struct hwmon_channel_info *ina3221_info[] = { + HWMON_CHANNEL_INFO(chip, + HWMON_C_SAMPLES), HWMON_CHANNEL_INFO(in, /* 0: dummy, skipped in is_visible */ HWMON_I_INPUT, |