diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/pmbus/pmbus.h | 2 | ||||
| -rw-r--r-- | drivers/hwmon/pmbus/pmbus_core.c | 27 |
2 files changed, 20 insertions, 9 deletions
diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h index b54d7604d3ef..d39d506aa63e 100644 --- a/drivers/hwmon/pmbus/pmbus.h +++ b/drivers/hwmon/pmbus/pmbus.h @@ -372,6 +372,8 @@ enum pmbus_sensor_classes { #define PMBUS_HAVE_PWM12 BIT(20) #define PMBUS_HAVE_PWM34 BIT(21) +#define PMBUS_PAGE_VIRTUAL BIT(31) + enum pmbus_data_format { linear = 0, direct, vid }; enum vrm_version { vr11 = 0, vr12, vr13 }; diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index fdd33857f117..99ab39f19bf4 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -162,18 +162,27 @@ EXPORT_SYMBOL_GPL(pmbus_clear_cache); int pmbus_set_page(struct i2c_client *client, int page) { struct pmbus_data *data = i2c_get_clientdata(client); - int rv = 0; - int newpage; + int rv; + + if (page < 0 || page == data->currpage) + return 0; - if (page >= 0 && page != data->currpage) { + if (!(data->info->func[page] & PMBUS_PAGE_VIRTUAL)) { rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); - newpage = i2c_smbus_read_byte_data(client, PMBUS_PAGE); - if (newpage != page) - rv = -EIO; - else - data->currpage = page; + if (rv < 0) + return rv; + + rv = i2c_smbus_read_byte_data(client, PMBUS_PAGE); + if (rv < 0) + return rv; + + if (rv != page) + return -EIO; } - return rv; + + data->currpage = page; + + return 0; } EXPORT_SYMBOL_GPL(pmbus_set_page); |