diff options
Diffstat (limited to 'drivers/hwmon/pmbus/pmbus_core.c')
| -rw-r--r-- | drivers/hwmon/pmbus/pmbus_core.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index cb4c65a7f288..e592446b2665 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -85,6 +85,8 @@ struct pmbus_data { u32 flags; /* from platform data */ + u8 revision; /* The PMBus revision the device is compliant with */ + int exponent[PMBUS_PAGES]; /* linear mode: exponent for output voltages */ @@ -1095,9 +1097,14 @@ static int pmbus_get_boolean(struct i2c_client *client, struct pmbus_boolean *b, regval = status & mask; if (regval) { - ret = _pmbus_write_byte_data(client, page, reg, regval); - if (ret) - goto unlock; + if (data->revision >= PMBUS_REV_12) { + ret = _pmbus_write_byte_data(client, page, reg, regval); + if (ret) + goto unlock; + } else { + pmbus_clear_fault_page(client, page); + } + } if (s1 && s2) { s64 v1, v2; @@ -2640,6 +2647,10 @@ static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data, data->flags |= PMBUS_WRITE_PROTECTED | PMBUS_SKIP_STATUS_CHECK; } + ret = i2c_smbus_read_byte_data(client, PMBUS_REVISION); + if (ret >= 0) + data->revision = ret; + if (data->info->pages) pmbus_clear_faults(client); else |