Re: [PATCH v3 05/10] pwm: add PWM mode to pwm_config()

[Sean Young]

On Thu, Feb 22, 2018 at 02:01:16PM +0200, Claudiu Beznea wrote:
> Add PWM mode to pwm_config() function. The drivers which uses pwm_config()
> were adapted to this change.
> 
> Signed-off-by: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx>
> ---

-snip-

> diff --git a/drivers/media/rc/ir-rx51.c b/drivers/media/rc/ir-rx51.c
> index 49265f02e772..a971b02ea021 100644
> --- a/drivers/media/rc/ir-rx51.c
> +++ b/drivers/media/rc/ir-rx51.c
> @@ -55,10 +55,13 @@ static int init_timing_params(struct ir_rx51 *ir_rx51)
>  {
>  	struct pwm_device *pwm = ir_rx51->pwm;
>  	int duty, period = DIV_ROUND_CLOSEST(NSEC_PER_SEC, ir_rx51->freq);
> +	struct pwm_caps caps = { };
>  
>  	duty = DIV_ROUND_CLOSEST(ir_rx51->duty_cycle * period, 100);
>  
> -	pwm_config(pwm, duty, period);
> +	pwm_get_caps(pwm->chip, pwm, &caps);
> +
> +	pwm_config(pwm, duty, period, BIT(ffs(caps.modes) - 1));
>  
>  	return 0;
>  }
> diff --git a/drivers/media/rc/pwm-ir-tx.c b/drivers/media/rc/pwm-ir-tx.c
> index 27d0f5837a76..c630e1b450a3 100644
> --- a/drivers/media/rc/pwm-ir-tx.c
> +++ b/drivers/media/rc/pwm-ir-tx.c
> @@ -61,6 +61,7 @@ static int pwm_ir_tx(struct rc_dev *dev, unsigned int *txbuf,
>  {
>  	struct pwm_ir *pwm_ir = dev->priv;
>  	struct pwm_device *pwm = pwm_ir->pwm;
> +	struct pwm_caps caps = { };
>  	int i, duty, period;
>  	ktime_t edge;
>  	long delta;
> @@ -68,7 +69,9 @@ static int pwm_ir_tx(struct rc_dev *dev, unsigned int *txbuf,
>  	period = DIV_ROUND_CLOSEST(NSEC_PER_SEC, pwm_ir->carrier);
>  	duty = DIV_ROUND_CLOSEST(pwm_ir->duty_cycle * period, 100);
>  
> -	pwm_config(pwm, duty, period);
> +	pwm_get_caps(pwm->chip, pwm, &caps);
> +
> +	pwm_config(pwm, duty, period, BIT(ffs(caps.modes) - 1));
>  
>  	edge = ktime_get();
>  

The two PWM rc-core drivers need PWM_MODE(NORMAL), not the first available
mode that the device supports. If mode normal is not supported, then probe
should fail.


Sean