diff options
Diffstat (limited to 'drivers/hwmon/pmbus/adm1275.c')
| -rw-r--r-- | drivers/hwmon/pmbus/adm1275.c | 95 |
1 files changed, 88 insertions, 7 deletions
diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c index 424d0d711cc..7a9f2d9dbba 100644 --- a/drivers/hwmon/pmbus/adm1275.c +++ b/drivers/hwmon/pmbus/adm1275.c @@ -31,14 +31,44 @@ #define ADM1275_VIN_VOUT_SELECT (1 << 6) #define ADM1275_VRANGE (1 << 5) +#define ADM1275_IOUT_WARN2_LIMIT 0xd7 +#define ADM1275_DEVICE_CONFIG 0xd8 + +#define ADM1275_IOUT_WARN2_SELECT (1 << 4) + +#define ADM1275_MFR_STATUS_IOUT_WARN2 (1 << 0) + +struct adm1275_data { + bool have_oc_fault; + struct pmbus_driver_info info; +}; + +#define to_adm1275_data(x) container_of(x, struct adm1275_data, info) + 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); + const struct adm1275_data *data = to_adm1275_data(info); int ret; if (page) - return -EINVAL; + return -ENXIO; switch (reg) { + case PMBUS_IOUT_UC_FAULT_LIMIT: + if (data->have_oc_fault) { + ret = -ENXIO; + break; + } + ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT); + break; + case PMBUS_IOUT_OC_FAULT_LIMIT: + if (!data->have_oc_fault) { + ret = -ENXIO; + break; + } + ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT); + break; case PMBUS_VIRT_READ_IOUT_MAX: ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT); break; @@ -66,9 +96,14 @@ static int adm1275_write_word_data(struct i2c_client *client, int page, int reg, int ret; if (page) - return -EINVAL; + return -ENXIO; switch (reg) { + case PMBUS_IOUT_UC_FAULT_LIMIT: + case PMBUS_IOUT_OC_FAULT_LIMIT: + ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT, + word); + break; case PMBUS_VIRT_RESET_IOUT_HISTORY: ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0); break; @@ -85,19 +120,52 @@ static int adm1275_write_word_data(struct i2c_client *client, int page, int reg, return ret; } +static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + const struct adm1275_data *data = to_adm1275_data(info); + int mfr_status, ret; + + if (page) + return -ENXIO; + + switch (reg) { + case PMBUS_STATUS_IOUT: + ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT); + if (ret < 0) + break; + mfr_status = pmbus_read_byte_data(client, page, + PMBUS_STATUS_MFR_SPECIFIC); + if (mfr_status < 0) { + ret = mfr_status; + break; + } + if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) { + ret |= data->have_oc_fault ? + PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT; + } + break; + default: + ret = -ENODATA; + break; + } + return ret; +} + static int adm1275_probe(struct i2c_client *client, const struct i2c_device_id *id) { - int config; + int config, device_config; int ret; struct pmbus_driver_info *info; + struct adm1275_data *data; if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_BYTE_DATA)) return -ENODEV; - info = kzalloc(sizeof(struct pmbus_driver_info), GFP_KERNEL); - if (!info) + data = kzalloc(sizeof(struct adm1275_data), GFP_KERNEL); + if (!data) return -ENOMEM; config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); @@ -106,6 +174,14 @@ static int adm1275_probe(struct i2c_client *client, goto err_mem; } + device_config = i2c_smbus_read_byte_data(client, ADM1275_DEVICE_CONFIG); + if (device_config < 0) { + ret = device_config; + goto err_mem; + } + + info = &data->info; + info->pages = 1; info->format[PSC_VOLTAGE_IN] = direct; info->format[PSC_VOLTAGE_OUT] = direct; @@ -116,6 +192,7 @@ static int adm1275_probe(struct i2c_client *client, info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT; info->read_word_data = adm1275_read_word_data; + info->read_byte_data = adm1275_read_byte_data; info->write_word_data = adm1275_write_word_data; if (config & ADM1275_VRANGE) { @@ -134,6 +211,9 @@ static int adm1275_probe(struct i2c_client *client, info->R[PSC_VOLTAGE_OUT] = -1; } + if (device_config & ADM1275_IOUT_WARN2_SELECT) + data->have_oc_fault = true; + if (config & ADM1275_VIN_VOUT_SELECT) info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; else @@ -145,16 +225,17 @@ static int adm1275_probe(struct i2c_client *client, return 0; err_mem: - kfree(info); + kfree(data); return ret; } static int adm1275_remove(struct i2c_client *client) { const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + const struct adm1275_data *data = to_adm1275_data(info); pmbus_do_remove(client); - kfree(info); + kfree(data); return 0; } |