The variables diff_input, ext_vref, and vref_mv are only used in the probe
function and therefore don't need to be kept in the device data structure.
Cc: Robert Rosengren <robert.rosengren@xxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
v2: Rebase to v2 of patch 1/2.
drivers/hwmon/ads7828.c | 32 ++++++++++++++------------------
1 file changed, 14 insertions(+), 18 deletions(-)
diff --git a/drivers/hwmon/ads7828.c b/drivers/hwmon/ads7828.c
index 071f779..bce4e9f 100644
--- a/drivers/hwmon/ads7828.c
+++ b/drivers/hwmon/ads7828.c
@@ -49,9 +49,6 @@ enum ads7828_chips { ads7828, ads7830 };
/* Client specific data */
struct ads7828_data {
struct regmap *regmap;
- bool diff_input; /* Differential input */
- bool ext_vref; /* External voltage reference */
- unsigned int vref_mv; /* voltage reference value */
u8 cmd_byte; /* Command byte without channel bits */
unsigned int lsb_resol; /* Resolution of the ADC sample LSB */
};
@@ -120,39 +117,38 @@ static int ads7828_probe(struct i2c_client *client,
struct ads7828_platform_data *pdata = dev_get_platdata(dev);
struct ads7828_data *data;
struct device *hwmon_dev;
+ unsigned int vref_mv = ADS7828_INT_VREF_MV;
+ bool diff_input = false;
+ bool ext_vref = false;
data = devm_kzalloc(dev, sizeof(struct ads7828_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
if (pdata) {
- data->diff_input = pdata->diff_input;
- data->ext_vref = pdata->ext_vref;
- if (data->ext_vref)
- data->vref_mv = pdata->vref_mv;
+ diff_input = pdata->diff_input;
+ ext_vref = pdata->ext_vref;
+ if (ext_vref && pdata->vref_mv)
+ vref_mv = pdata->vref_mv;
}
- /* Bound Vref with min/max values if it was provided */
- if (data->vref_mv)
- data->vref_mv = clamp_val(data->vref_mv,
- ADS7828_EXT_VREF_MV_MIN,
- ADS7828_EXT_VREF_MV_MAX);
- else
- data->vref_mv = ADS7828_INT_VREF_MV;
+ /* Bound Vref with min/max values */
+ vref_mv = clamp_val(vref_mv, ADS7828_EXT_VREF_MV_MIN,
+ ADS7828_EXT_VREF_MV_MAX);
/* ADS7828 uses 12-bit samples, while ADS7830 is 8-bit */
if (id->driver_data == ads7828) {
- data->lsb_resol = DIV_ROUND_CLOSEST(data->vref_mv * 1000, 4096);
+ data->lsb_resol = DIV_ROUND_CLOSEST(vref_mv * 1000, 4096);
data->regmap = devm_regmap_init_i2c(client,
&ads2828_regmap_config);
} else {
- data->lsb_resol = DIV_ROUND_CLOSEST(data->vref_mv * 1000, 256);
+ data->lsb_resol = DIV_ROUND_CLOSEST(vref_mv * 1000, 256);
data->regmap = devm_regmap_init_i2c(client,
&ads2830_regmap_config);
}
- data->cmd_byte = data->ext_vref ? ADS7828_CMD_PD1 : ADS7828_CMD_PD3;
- if (!data->diff_input)
+ data->cmd_byte = ext_vref ? ADS7828_CMD_PD1 : ADS7828_CMD_PD3;
+ if (!diff_input)
data->cmd_byte |= ADS7828_CMD_SD_SE;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
--
2.1.0
_______________________________________________
lm-sensors mailing list
lm-sensors@xxxxxxxxxxxxxx
http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
