Re: [PATCH v7 2/2] pwm: Add GPIO PWM driver

[Dhruva Gole <d-gole@xxxxxx>]

On Jun 04, 2024 at 23:00:41 +0200, Linus Walleij wrote:
> From: Vincent Whitchurch <vincent.whitchurch@xxxxxxxx>
> 
> Add a software PWM which toggles a GPIO from a high-resolution timer.
> 
> This will naturally not be as accurate or as efficient as a hardware
> PWM, but it is useful in some cases.  I have for example used it for
> evaluating LED brightness handling (via leds-pwm) on a board where the
> LED was just hooked up to a GPIO, and for a simple verification of the
> timer frequency on another platform.
> 
> Since high-resolution timers are used, sleeping GPIO chips are not
> supported and are rejected in the probe function.
> 
> Signed-off-by: Vincent Whitchurch <vincent.whitchurch@xxxxxxxx>
> Co-developed-by: Stefan Wahren <wahrenst@xxxxxxx>
> Signed-off-by: Stefan Wahren <wahrenst@xxxxxxx>
> Co-developed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> Reviewed-by: Andy Shevchenko <andy@xxxxxxxxxx>
> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> ---
>  Documentation/driver-api/gpio/drivers-on-gpio.rst |   7 +-
>  drivers/pwm/Kconfig                               |  11 +
>  drivers/pwm/Makefile                              |   1 +
>  drivers/pwm/pwm-gpio.c                            | 241 ++++++++++++++++++++++
>  4 files changed, 259 insertions(+), 1 deletion(-)
> 

Reviewed-by: Dhruva Gole <d-gole@xxxxxx>

-- 
Best regards,
Dhruva Gole <d-gole@xxxxxx>