linux-kernel - Re: [PATCH 1/2] Add a common struct clk

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Message-ID: <20110222201725.GF22310@pengutronix.de>
Date:	Tue, 22 Feb 2011 21:17:25 +0100
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	Jeremy Kerr <jeremy.kerr@...onical.com>
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	linux-sh@...r.kernel.org,
	Ben Herrenchmidt <benh@...nel.crashing.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Paul Mundt <lethal@...ux-sh.org>,
	Dima Zavin <dmitriyz@...gle.com>,
	Saravana Kannan <skannan@...eaurora.org>,
	Ben Dooks <ben-linux@...ff.org>,
	Russell King <linux@....linux.org.uk>
Subject: Re: [PATCH 1/2] Add a common struct clk

Hi Jeremy,

On Mon, Feb 21, 2011 at 10:50:58AM +0800, Jeremy Kerr wrote:
> diff --git a/include/linux/clk.h b/include/linux/clk.h
> index 1d37f42..604be74 100644
> --- a/include/linux/clk.h
> +++ b/include/linux/clk.h
> @@ -11,18 +12,168 @@
> ...
> +#ifdef CONFIG_USE_COMMON_STRUCT_CLK
> ...
> +#else /* !CONFIG_USE_COMMON_STRUCT_CLK */
>  
>  /*
> - * struct clk - an machine class defined object / cookie.
> + * Global clock object, actual structure is declared per-machine
>   */
>  struct clk;
>  
> +static inline void clk_common_init(struct clk *clk) { }
> +
> +/*
> + * For !CONFIG_USE_COMMON_STRUCT_CLK, we don't enforce any atomicity
> + * requirements for clk_enable/clk_disable, so the prepare and unprepare
> + * functions are no-ops
> + */
> +int clk_prepare(struct clk *clk) { return 0; }
> +void clk_unprepare(struct clk *clk) { }
these should be static inline.  Otherwise these functions end up in many
files and so provoke a build failure.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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