On Mon, Dec 10, 2012 at 11:00:36AM +0100, Peter Ujfalusi wrote:
> Allow client driver to use of_pwm_request() to get the pwm they need. This
> is needed for drivers which handle more than one pwm separately, like
> leds-pwm driver which have:
Hi Peter,
I really was hoping that we didn't have to export this function, but I
can't think of any other way to solve the problem at hand either. I'd
prefer to rename the function to of_pwm_get() at the same time to keep
consistent with other subsystems that provide similar functionality.
Also, please use all-caps for PWM in prose. And while at it, you can
drop the "core:" and "so client drivers can also use it" from the
subject line.
> pwmleds {
> compatible = "pwm-leds";
> kpad {
> label = "omap4::keypad";
> pwms = <&twl_pwm 0 7812500>;
> max-brightness = <127>;
> };
>
> charging {
> label = "omap4:green:chrg";
> pwms = <&twl_pwmled 0 7812500>;
> max-brightness = <255>;
> };
> };
>
> in the dts files.
>
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
> ---
> drivers/pwm/core.c | 2 +-
> include/linux/pwm.h | 7 +++++++
> 2 files changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
> index 903138b..3a7ebcc 100644
> --- a/drivers/pwm/core.c
> +++ b/drivers/pwm/core.c
> @@ -486,7 +486,7 @@ static struct pwm_chip *of_node_to_pwmchip(struct device_node *np)
> * becomes mandatory for devices that look up the PWM device via the con_id
> * parameter.
> */
> -static struct pwm_device *of_pwm_request(struct device_node *np,
> +struct pwm_device *of_pwm_request(struct device_node *np,
> const char *con_id)
> {
> struct pwm_device *pwm = NULL;
This is missing an EXPORT_SYMBOL_GPL.
> diff --git a/include/linux/pwm.h b/include/linux/pwm.h
> index 6d661f3..d70ffe3 100644
> --- a/include/linux/pwm.h
> +++ b/include/linux/pwm.h
> @@ -175,6 +175,7 @@ struct pwm_device *of_pwm_xlate_with_flags(struct pwm_chip *pc,
> const struct of_phandle_args *args);
>
> struct pwm_device *pwm_get(struct device *dev, const char *consumer);
> +struct pwm_device *of_pwm_request(struct device_node *np, const char *con_id);
While at it, maybe rename the con_id parameter as well to match
pwm_get().
Thierry
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