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authorArmin Wolf <W_Armin@gmx.de>2022-02-24 07:12:10 +0100
committerGuenter Roeck <linux@roeck-us.net>2022-02-27 17:03:19 -0800
commitaa9f833dfc128169a1162261c5641aa516b4a231 (patch)
tree532f604431483d8501ded64a41bac75a3f7080e3 /drivers/hwmon
parente75d16e58467c5703821e12536c7dc438f3c425d (diff)
hwmon: (sch5627) Add pwmX_auto_channels_temp support
After doing some research, it seems that Fujitsu's hardware monitoring solution exports data describing which temperature sensors affect which fans, similar to the data in fan_source of the ftsteutates driver. Writing 0 into these registers forces the fans to full speed. Export this data with standard attributes. Signed-off-by: Armin Wolf <W_Armin@gmx.de> Link: https://lore.kernel.org/r/20220224061210.16452-3-W_Armin@gmx.de Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/sch5627.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/hwmon/sch5627.c b/drivers/hwmon/sch5627.c
index 72c3f6757e34..25fbbd4c9a2b 100644
--- a/drivers/hwmon/sch5627.c
+++ b/drivers/hwmon/sch5627.c
@@ -52,6 +52,9 @@ static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
0x62, 0x64, 0x66, 0x68 };
+static const u16 SCH5627_REG_PWM_MAP[SCH5627_NO_FANS] = {
+ 0xA0, 0xA1, 0xA2, 0xA3 };
+
static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
0x22, 0x23, 0x24, 0x25, 0x189 };
static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
@@ -223,6 +226,9 @@ static int reg_to_rpm(u16 reg)
static umode_t sch5627_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr,
int channel)
{
+ if (type == hwmon_pwm && attr == hwmon_pwm_auto_channels_temp)
+ return 0644;
+
return 0444;
}
@@ -278,6 +284,23 @@ static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 at
break;
}
break;
+ case hwmon_pwm:
+ switch (attr) {
+ case hwmon_pwm_auto_channels_temp:
+ mutex_lock(&data->update_lock);
+ ret = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PWM_MAP[channel]);
+ mutex_unlock(&data->update_lock);
+
+ if (ret < 0)
+ return ret;
+
+ *val = ret;
+
+ return 0;
+ default:
+ break;
+ }
+ break;
case hwmon_in:
ret = sch5627_update_in(data);
if (ret < 0)
@@ -318,10 +341,42 @@ static int sch5627_read_string(struct device *dev, enum hwmon_sensor_types type,
return -EOPNOTSUPP;
}
+static int sch5627_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
+ long val)
+{
+ struct sch5627_data *data = dev_get_drvdata(dev);
+ int ret;
+
+ switch (type) {
+ case hwmon_pwm:
+ switch (attr) {
+ case hwmon_pwm_auto_channels_temp:
+ /* registers are 8 bit wide */
+ if (val > U8_MAX || val < 0)
+ return -EINVAL;
+
+ mutex_lock(&data->update_lock);
+ ret = sch56xx_write_virtual_reg(data->addr, SCH5627_REG_PWM_MAP[channel],
+ val);
+ mutex_unlock(&data->update_lock);
+
+ return ret;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return -EOPNOTSUPP;
+}
+
static const struct hwmon_ops sch5627_ops = {
.is_visible = sch5627_is_visible,
.read = sch5627_read,
.read_string = sch5627_read_string,
+ .write = sch5627_write,
};
static const struct hwmon_channel_info *sch5627_info[] = {
@@ -342,6 +397,12 @@ static const struct hwmon_channel_info *sch5627_info[] = {
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT
),
+ HWMON_CHANNEL_INFO(pwm,
+ HWMON_PWM_AUTO_CHANNELS_TEMP,
+ HWMON_PWM_AUTO_CHANNELS_TEMP,
+ HWMON_PWM_AUTO_CHANNELS_TEMP,
+ HWMON_PWM_AUTO_CHANNELS_TEMP
+ ),
HWMON_CHANNEL_INFO(in,
HWMON_I_INPUT | HWMON_I_LABEL,
HWMON_I_INPUT | HWMON_I_LABEL,