On Thu, Feb 24, 2022 at 07:12:10AM +0100, Armin Wolf wrote:
> 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@xxxxxx>
Applied to hwmon-next.
Thanks,
Guenter
> ---
> Documentation/hwmon/sch5627.rst | 4 +++
> drivers/hwmon/sch5627.c | 61 +++++++++++++++++++++++++++++++++
> 2 files changed, 65 insertions(+)
>
> --
> 2.30.2
>
> diff --git a/Documentation/hwmon/sch5627.rst b/Documentation/hwmon/sch5627.rst
> index 187682e99114..ecb4fc84d045 100644
> --- a/Documentation/hwmon/sch5627.rst
> +++ b/Documentation/hwmon/sch5627.rst
> @@ -20,6 +20,10 @@ Description
> SMSC SCH5627 Super I/O chips include complete hardware monitoring
> capabilities. They can monitor up to 5 voltages, 4 fans and 8 temperatures.
>
> +In addition, the SCH5627 exports data describing which temperature sensors
> +affect the speed of each fan. Setting pwmX_auto_channels_temp to 0 forces
> +the corresponding fan to full speed until another value is written.
> +
> The SMSC SCH5627 hardware monitoring part also contains an integrated
> watchdog. In order for this watchdog to function some motherboard specific
> initialization most be done by the BIOS, so if the watchdog is not enabled
> 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,
