diff options
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/w83795.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/hwmon/w83795.c b/drivers/hwmon/w83795.c index 24e44245e548..458fb297f696 100644 --- a/drivers/hwmon/w83795.c +++ b/drivers/hwmon/w83795.c @@ -316,6 +316,7 @@ struct w83795_data { u8 bank; u32 has_in; /* Enable monitor VIN or not */ + u8 has_dyn_in; /* Only in2-0 can have this */ u16 in[21][3]; /* Register value, read/high/low */ u8 in_lsb[10][3]; /* LSB Register value, high/low */ u8 has_gain; /* has gain: in17-20 * 8 */ @@ -450,6 +451,23 @@ static struct w83795_data *w83795_update_device(struct device *dev) data->in[i][IN_READ] = tmp; } + /* in0-2 can have dynamic limits (W83795G only) */ + if (data->has_dyn_in) { + u8 lsb_max = w83795_read(client, IN_LSB_REG(0, IN_MAX)); + u8 lsb_low = w83795_read(client, IN_LSB_REG(0, IN_LOW)); + + for (i = 0; i < 3; i++) { + if (!(data->has_dyn_in & (1 << i))) + continue; + data->in[i][IN_MAX] = + w83795_read(client, W83795_REG_IN[i][IN_MAX]); + data->in[i][IN_LOW] = + w83795_read(client, W83795_REG_IN[i][IN_LOW]); + data->in_lsb[i][IN_MAX] = (lsb_max >> (2 * i)) & 0x03; + data->in_lsb[i][IN_LOW] = (lsb_low >> (2 * i)) & 0x03; + } + } + /* Update fan */ for (i = 0; i < ARRAY_SIZE(data->fan); i++) { if (!(data->has_fan & (1 << i))) @@ -1450,6 +1468,8 @@ store_sf_setup(struct device *dev, struct device_attribute *attr, #define NOT_USED -1 +/* Don't change the attribute order, _max and _min are accessed by index + * somewhere else in the code */ #define SENSOR_ATTR_IN(index) { \ SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL, \ IN_READ, index), \ @@ -1844,6 +1864,39 @@ static int device_remove_file_wrapper(struct device *dev, return 0; } +static void w83795_check_dynamic_in_limits(struct i2c_client *client) +{ + struct w83795_data *data = i2c_get_clientdata(client); + u8 vid_ctl; + int i, err_max, err_min; + + vid_ctl = w83795_read(client, W83795_REG_VID_CTRL); + + /* Return immediately if VRM isn't configured */ + if ((vid_ctl & 0x07) == 0x00 || (vid_ctl & 0x07) == 0x07) + return; + + data->has_dyn_in = (vid_ctl >> 3) & 0x07; + for (i = 0; i < 2; i++) { + if (!(data->has_dyn_in & (1 << i))) + continue; + + /* Voltage limits in dynamic mode, switch to read-only */ + err_max = sysfs_chmod_file(&client->dev.kobj, + &w83795_in[i][2].dev_attr.attr, + S_IRUGO); + err_min = sysfs_chmod_file(&client->dev.kobj, + &w83795_in[i][3].dev_attr.attr, + S_IRUGO); + if (err_max || err_min) + dev_warn(&client->dev, "Failed to set in%d limits " + "read-only (%d, %d)\n", i, err_max, err_min); + else + dev_info(&client->dev, "in%d limits set dynamically " + "from VID\n", i); + } +} + /* Check pins that can be used for either temperature or voltage monitoring */ static void w83795_apply_temp_config(struct w83795_data *data, u8 config, int temp_chan, int in_chan) @@ -2049,6 +2102,9 @@ static int w83795_probe(struct i2c_client *client, if (err) goto exit_remove; + if (data->chip_type == w83795g) + w83795_check_dynamic_in_limits(client); + data->hwmon_dev = hwmon_device_register(dev); if (IS_ERR(data->hwmon_dev)) { err = PTR_ERR(data->hwmon_dev); |