Re: [PATCH 4/8] pwm: atmel-hlcdc: fix struct clk pointer comparing

Thierry Reding
2015-03-11T10:54:23Z

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On Wed, Feb 25, 2015 at 10:53:34PM +0800, Shawn Guo wrote:
> Since commit 035a61c314eb ("clk: Make clk API return per-user struct clk
> instances"), clk API users can no longer check if two struct clk
> pointers are pointing to the same hardware clock, i.e. struct clk_hw, by
> simply comparing two pointers. That's because with the per-user clk
> change, a brand new struct clk is created whenever clients try to look
> up the clock by calling clk_get() or sister functions like clk_get_sys()
> and of_clk_get(). This changes the original behavior where the struct
> clk is only created for once when clock driver registers the clock to
> CCF in the first place. The net change here is before commit
> 035a61c314eb the struct clk pointer is unique for given hardware
> clock, while after the commit the pointers returned by clk lookup calls
> become different for the same hardware clock.
>
> That said, the struct clk pointer comparing in the code doesn't work any
> more. Call helper function clk_is_match() instead to fix the problem.
>
> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> ---
> drivers/pwm/pwm-atmel-hlcdc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)

Acked-by: Thierry Reding <thierry.reding@gmail.com>

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