On Fri, Jun 14, 2024 at 11:25:31AM +0530, Naresh Solanki wrote:
> Add attribute for fan & pwm i.e.,
> fanY_pulse
> pwmY_freq
>
> Signed-off-by: Naresh Solanki <naresh.solanki@xxxxxxxxxxxxx>
> ---
> Changes in V5:
> - Remove unnecessary IS_ERR check.
> - Add mutex
> ---
> drivers/hwmon/max6639.c | 90 +++++++++++++++++++++++++++++++++++++++--
> 1 file changed, 86 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/hwmon/max6639.c b/drivers/hwmon/max6639.c
> index 45ed629c6af9..091a4a0abd27 100644
> --- a/drivers/hwmon/max6639.c
> +++ b/drivers/hwmon/max6639.c
> @@ -76,6 +76,7 @@ static const unsigned int freq_table[] = { 20, 33, 50, 100, 5000, 8333, 12500,
> */
> struct max6639_data {
> struct regmap *regmap;
> + struct mutex update_lock;
>
> /* Register values initialized only once */
> u8 ppr[MAX6639_NUM_CHANNELS]; /* Pulses per rotation 0..3 for 1..4 ppr */
> @@ -232,6 +233,9 @@ static int max6639_read_fan(struct device *dev, u32 attr, int channel,
> return res;
> *fan_val = !!(val & BIT(1 - channel));
> return 0;
> + case hwmon_fan_pulses:
> + *fan_val = data->ppr[channel];
> + return 0;
> default:
> return -EOPNOTSUPP;
> }
> @@ -243,6 +247,33 @@ static int max6639_set_ppr(struct max6639_data *data, int channel, u8 ppr)
> return regmap_write(data->regmap, MAX6639_REG_FAN_PPR(channel), ppr-- << 6);
> }
>
> +static int max6639_write_fan(struct device *dev, u32 attr, int channel,
> + long val)
> +{
> + struct max6639_data *data = dev_get_drvdata(dev);
> + int err;
> +
> + switch (attr) {
> + case hwmon_fan_pulses:
> + if (val <= 0 || val > 5)
> + return -EINVAL;
> +
Testing max6639 ...
Out of range value accepted writing into fan1_pulses: val=5 max=4
Out of range value accepted writing into fan2_pulses: val=5 max=4
Valid range is 1..4.
No need to resend, I'll fix that up and apply.
Thanks,
Guenter
