[PATCH v4 00/20] Samsung PWM support cleanup

Sylwester Nawrocki sylvester.nawrocki at gmail.com
Sun Jul 21 18:22:16 EDT 2013

On 07/20/2013 02:04 AM, Tomasz Figa wrote:
> Since we now have a proper Samsung PWM clocksource driver in place,
> we can proceed with further cleanup of PWM timers support on Samsung SoCs.
> This series attempts to achieve this goal by:
>   1) fixing up few things in samsung_pwm_timer clocksource driver,
>   2) moving remaining Samsung platforms to the new clocksource driver,
>   3) removing old clocksource driver,
>   4) adding new multiplatform- and DT-aware PWM driver,
>   5) moving all Samsung platforms to use the new PWM driver,
>   6) removing old PWM driver,
>   7) removing all PWM-related code that is not used anymore.
> Cleaning up the PWM driver is a bit tricky, because the design of current
> driver makes it completely unsuitable for DT and multiplatform and would
> require a heavy rework to make it usable, breaking any existing Samsung PWM
> users by the way. To avoid any breakage this series first renames the old
> driver, then adds new one using original name, migrates all platforms to
> use it and then finally removes the old driver.
> See particular patches for more detailed descriptions.
> [On S3C6410-based Tiny6410 (Mini6410-compatible) with pwm-beeper, SMDK6410
> with PWM backlight and Exynos4210-based Origen board (with PWM0 attached
> to a scope)]
> Tested-by: Tomasz Figa<tomasz.figa at gmail.com>
> [On S3C2440-based Mini2440 board]
> Tested-by: Sylwester Nawrocki<sylvester.nawrocki at gmail.com>

I have retested this series on top of v3.11-rc1 with pwm-backlight (and 
as the output :)) on Mini2440. It seems to work well - generated frequencies
are correct. I'll check pulse widths with a scope tomorrow, as it's a 
bit late
now. FWIW you can add to this series my:

Reviewed-by: Sylwester Nawrocki <s.nawrocki at samsung.com>

> [On a s3c2416 based machine]
> Tested-by: Heiko Stuebner<heiko at sntech.de>
> [Also not sure on what boards, but still]
> Tested-by: Mark Brown<broonie at linaro.org>
> Acked-by: Arnd Bergmann<arnd at arndb.de>
> Acked-by: Thierry Reding<thierry.reding at gmail.com>
> Acked-by: Heiko Stuebner<heiko at sntech.de>


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