hwmon: (lm95234) Add support for tempX_enable attribute

LM95233/LM95234 support enabling temperature channels one by one.
Add support for tempX_enable attribute to be able to use that
functionality.

Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/lm95234.c b/drivers/hwmon/lm95234.c
index 85350e9c9c4c346f6869c9ccb8aa36d32e1ad38b..d3d4b1d82899c595a793871b39067d85b4de0242 100644 (file)
--- a/drivers/hwmon/lm95234.c
+++ b/drivers/hwmon/lm95234.c
@@ -144,6 +144,11 @@ static int lm95234_temp_write(struct device *dev, u32 attr, int channel, long va
        struct regmap *regmap = data->regmap;
 
        switch (attr) {
+       case hwmon_temp_enable:
+               if (val && val != 1)
+                       return -EINVAL;
+               return regmap_update_bits(regmap, LM95234_REG_ENABLE,
+                                         BIT(channel), val ? BIT(channel) : 0);
        case hwmon_temp_type:
                if (val != 1 && val != 2)
                        return -EINVAL;
@@ -183,6 +188,12 @@ static int lm95234_temp_read(struct device *dev, u32 attr, int channel, long *va
        int ret;
 
        switch (attr) {
+       case hwmon_temp_enable:
+               ret = regmap_read(regmap, LM95234_REG_ENABLE, &regval);
+               if (ret)
+                       return ret;
+               *val = !!(regval & BIT(channel));
+               break;
        case hwmon_temp_input:
                return lm95234_read_temp(regmap, channel, val);
        case hwmon_temp_max_alarm:
@@ -331,6 +342,7 @@ static umode_t lm95234_is_visible(const void *_data, enum hwmon_sensor_types typ
                case hwmon_temp_fault:
                        return channel ? 0444 : 0;
                case hwmon_temp_max:
+               case hwmon_temp_enable:
                        return 0644;
                case hwmon_temp_max_hyst:
                        return channel ? 0444 : 0644;
@@ -350,21 +362,21 @@ static const struct hwmon_channel_info * const lm95234_info[] = {
        HWMON_CHANNEL_INFO(chip, HWMON_C_UPDATE_INTERVAL),
        HWMON_CHANNEL_INFO(temp,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
-                          HWMON_T_MAX_ALARM,
+                          HWMON_T_MAX_ALARM | HWMON_T_ENABLE,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
                           HWMON_T_MAX_ALARM | HWMON_T_FAULT | HWMON_T_TYPE |
                           HWMON_T_CRIT | HWMON_T_CRIT_HYST |
-                          HWMON_T_CRIT_ALARM | HWMON_T_OFFSET,
+                          HWMON_T_CRIT_ALARM | HWMON_T_OFFSET | HWMON_T_ENABLE,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
                           HWMON_T_MAX_ALARM | HWMON_T_FAULT | HWMON_T_TYPE |
                           HWMON_T_CRIT | HWMON_T_CRIT_HYST |
-                          HWMON_T_CRIT_ALARM | HWMON_T_OFFSET,
+                          HWMON_T_CRIT_ALARM | HWMON_T_OFFSET | HWMON_T_ENABLE,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
                           HWMON_T_MAX_ALARM | HWMON_T_FAULT | HWMON_T_TYPE |
-                          HWMON_T_OFFSET,
+                          HWMON_T_OFFSET | HWMON_T_ENABLE,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
                           HWMON_T_MAX_ALARM | HWMON_T_FAULT | HWMON_T_TYPE |
-                          HWMON_T_OFFSET),
+                          HWMON_T_OFFSET | HWMON_T_ENABLE),
        NULL
 };