linux-kernel - Re: [PATCH] spi: pl022: Add clk_{un}prepare() support in runtime PM

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Date:	Mon, 17 Sep 2012 16:09:34 +0400
From:	Sergei Shtylyov <sshtylyov@...sta.com>
To:	Vipul Kumar Samar <vipulkumar.samar@...com>
CC:	grant.likely@...retlab.ca, spi-devel-general@...ts.sourceforge.net,
	linus.walleij@...aro.org, spear-devel@...t.st.com,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] spi: pl022:  Add clk_{un}prepare() support in runtime
 PM

Hello.

On 17-09-2012 14:37, Vipul Kumar Samar wrote:

> clk_{un}prepare is mandatory for platforms using common clock framework. Add
> clk_{un}prepare() support for spi-pl022 runtime PM.

> Signed-off-by: Vipul Kumar Samar <vipulkumar.samar@...com>
[...]

> @@ -2342,10 +2342,13 @@ static int pl022_runtime_suspend(struct device *dev)
>   static int pl022_runtime_resume(struct device *dev)
>   {
>   	struct pl022 *pl022 = dev_get_drvdata(dev);
> +	int ret = 0;

    Don't need to init it at all.

> -	clk_enable(pl022->clk);
> +	ret = clk_prepare_enable(pl022->clk);
> +	if (ret)
> +		dev_err(dev, "could not enable SSP/SPI bus clock\n");
>
> -	return 0;
> +	return ret;
>   }
>   #endif

WBR, Sergei

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