diff options
Diffstat (limited to 'drivers/hwmon/pmbus/adm1275.c')
| -rw-r--r-- | drivers/hwmon/pmbus/adm1275.c | 105 |
1 files changed, 104 insertions, 1 deletions
diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c index 82052b6611c9..5caa37fbfc18 100644 --- a/drivers/hwmon/pmbus/adm1275.c +++ b/drivers/hwmon/pmbus/adm1275.c @@ -14,6 +14,8 @@ #include <linux/slab.h> #include <linux/i2c.h> #include <linux/bitops.h> +#include <linux/bitfield.h> +#include <linux/log2.h> #include "pmbus.h" enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 }; @@ -69,6 +71,18 @@ enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 }; #define ADM1075_VAUX_OV_WARN BIT(7) #define ADM1075_VAUX_UV_WARN BIT(6) +#define ADM1275_VI_AVG_SHIFT 0 +#define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \ + ADM1275_VI_AVG_SHIFT) +#define ADM1275_SAMPLES_AVG_MAX 128 + +#define ADM1278_PWR_AVG_SHIFT 11 +#define ADM1278_PWR_AVG_MASK GENMASK(ADM1278_PWR_AVG_SHIFT + 2, \ + ADM1278_PWR_AVG_SHIFT) +#define ADM1278_VI_AVG_SHIFT 8 +#define ADM1278_VI_AVG_MASK GENMASK(ADM1278_VI_AVG_SHIFT + 2, \ + ADM1278_VI_AVG_SHIFT) + struct adm1275_data { int id; bool have_oc_fault; @@ -80,6 +94,7 @@ struct adm1275_data { bool have_pin_min; bool have_pin_max; bool have_temp_max; + bool have_power_sampling; struct pmbus_driver_info info; }; @@ -155,6 +170,62 @@ static const struct coefficients adm1293_coefficients[] = { [18] = { 7658, 0, -3 }, /* power, 21V, irange200 */ }; +static int adm1275_read_pmon_config(const struct adm1275_data *data, + struct i2c_client *client, bool is_power) +{ + int shift, ret; + u16 mask; + + /* + * The PMON configuration register is a 16-bit register only on chips + * supporting power average sampling. On other chips it is an 8-bit + * register. + */ + if (data->have_power_sampling) { + ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG); + mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK; + shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT; + } else { + ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); + mask = ADM1275_VI_AVG_MASK; + shift = ADM1275_VI_AVG_SHIFT; + } + if (ret < 0) + return ret; + + return (ret & mask) >> shift; +} + +static int adm1275_write_pmon_config(const struct adm1275_data *data, + struct i2c_client *client, + bool is_power, u16 word) +{ + int shift, ret; + u16 mask; + + if (data->have_power_sampling) { + ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG); + mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK; + shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT; + } else { + ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); + mask = ADM1275_VI_AVG_MASK; + shift = ADM1275_VI_AVG_SHIFT; + } + if (ret < 0) + return ret; + + word = (ret & ~mask) | ((word << shift) & mask); + if (data->have_power_sampling) + ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG, + word); + else + ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONFIG, + word); + + return ret; +} + static int adm1275_read_word_data(struct i2c_client *client, int page, int reg) { const struct pmbus_driver_info *info = pmbus_get_driver_info(client); @@ -233,6 +304,21 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg) if (!data->have_temp_max) return -ENXIO; break; + case PMBUS_VIRT_POWER_SAMPLES: + if (!data->have_power_sampling) + return -ENXIO; + ret = adm1275_read_pmon_config(data, client, true); + if (ret < 0) + break; + ret = BIT(ret); + break; + case PMBUS_VIRT_IN_SAMPLES: + case PMBUS_VIRT_CURR_SAMPLES: + ret = adm1275_read_pmon_config(data, client, false); + if (ret < 0) + break; + ret = BIT(ret); + break; default: ret = -ENODATA; break; @@ -277,6 +363,19 @@ static int adm1275_write_word_data(struct i2c_client *client, int page, int reg, case PMBUS_VIRT_RESET_TEMP_HISTORY: ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0); break; + case PMBUS_VIRT_POWER_SAMPLES: + if (!data->have_power_sampling) + return -ENXIO; + word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX); + ret = adm1275_write_pmon_config(data, client, true, + ilog2(word)); + break; + case PMBUS_VIRT_IN_SAMPLES: + case PMBUS_VIRT_CURR_SAMPLES: + word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX); + ret = adm1275_write_pmon_config(data, client, false, + ilog2(word)); + break; default: ret = -ENODATA; break; @@ -430,7 +529,8 @@ static int adm1275_probe(struct i2c_client *client, info->format[PSC_CURRENT_OUT] = direct; info->format[PSC_POWER] = direct; info->format[PSC_TEMPERATURE] = direct; - info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT; + info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | + PMBUS_HAVE_SAMPLES; info->read_word_data = adm1275_read_word_data; info->read_byte_data = adm1275_read_byte_data; @@ -471,6 +571,7 @@ static int adm1275_probe(struct i2c_client *client, data->have_vout = true; data->have_pin_max = true; data->have_temp_max = true; + data->have_power_sampling = true; coefficients = adm1272_coefficients; vindex = (config & ADM1275_VRANGE) ? 1 : 0; @@ -556,6 +657,7 @@ static int adm1275_probe(struct i2c_client *client, data->have_vout = true; data->have_pin_max = true; data->have_temp_max = true; + data->have_power_sampling = true; coefficients = adm1278_coefficients; vindex = 0; @@ -591,6 +693,7 @@ static int adm1275_probe(struct i2c_client *client, data->have_pin_min = true; data->have_pin_max = true; data->have_mfr_vaux_status = true; + data->have_power_sampling = true; coefficients = adm1293_coefficients; |