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Date: Thu, 10 Jul 2014 11:16:34 +0200 From: Tomeu Vizoso <tomeu.vizoso@...labora.com> To: Tomasz Figa <tomasz.figa@...il.com>, Stephen Warren <swarren@...dotorg.org>, Thierry Reding <thierry.reding@...il.com>, Mike Turquette <mturquette@...aro.org>, rabin@....in, linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org CC: Rabin Vincent <rabin.vincent@...ricsson.com>, Javier Martinez Canillas <javier.martinez@...labora.co.uk> Subject: Re: [RFC v2 3/5] clk: use struct clk only for external API On 07/09/2014 10:12 PM, Tomasz Figa wrote: > Actually few more comments, see inline. > > On 03.07.2014 16:38, Tomeu Vizoso wrote: >> From: Rabin Vincent <rabin.vincent@...ricsson.com> >> >> In order to provide per-user accounting, this separates the struct clk >> used in the common clock framework into two structures 'struct clk_core' >> and 'struct clk'. struct clk_core will be used for internal >> manipulation and struct clk will be used in the clock API >> implementation. > > [snip] > >> diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c >> index 8f57154..5f2aba9 100644 >> --- a/drivers/clk/clk-devres.c >> +++ b/drivers/clk/clk-devres.c >> @@ -5,6 +5,7 @@ >> */ >> >> #include <linux/clk.h> >> +#include <linux/clk-provider.h> >> #include <linux/device.h> >> #include <linux/export.h> >> #include <linux/gfp.h> >> @@ -14,15 +15,15 @@ static void devm_clk_release(struct device *dev, void *res) >> clk_put(*(struct clk **)res); > > This function still expects to get a (struct clk *) here, but... > >> } >> >> -struct clk *devm_clk_get(struct device *dev, const char *id) >> +struct clk_core *devm_clk_provider_get(struct device *dev, const char *id) >> { >> - struct clk **ptr, *clk; >> + struct clk_core **ptr, *clk; >> >> ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL); >> if (!ptr) >> return ERR_PTR(-ENOMEM); >> >> - clk = clk_get(dev, id); >> + clk = clk_provider_get(dev, id); >> if (!IS_ERR(clk)) { >> *ptr = clk; > > ...here a (struct clk_core *) is stored. Thanks, well spotted. >> devres_add(dev, ptr); > > [snip] > >> diff --git a/drivers/clk/clk.h b/drivers/clk/clk.h >> index d278572..c69f4fe 100644 >> --- a/drivers/clk/clk.h >> +++ b/drivers/clk/clk.h >> @@ -15,3 +15,7 @@ struct clk_core *__of_clk_get_from_provider(struct of_phandle_args *clkspec); >> void of_clk_lock(void); >> void of_clk_unlock(void); >> #endif >> + >> +#if defined(CONFIG_COMMON_CLK) >> +#define clk_to_clk_core(clk) (clk->core) > > Making this a static inline will benefit you with type checking at > compilation time. Good point. >> +#endif > > [snip] > >> + >> +#define clk_core_to_clk(core) ((struct clk *)(core)) > > Hmm, I'm not following. clk_to_clk_core() returns clk->core, while > clk_core_to_clk() simply casts whatever the former returns into a > pointer to struct clk? Yeah, this is totally wrong, v3 will be fixing this, I have tested it on an Odroid U2, so the most embarrassing issues have been fixed. Thanks, Tomeu > Also this should be a static inline to benefit from compiler type checking. > > Best regards, > Tomasz > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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