linux-kernel - Re: [PATCH 1/2] mmc: sdhci-spear: Initialize sdhci clk to 50 MHz

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Date:	Mon, 26 Nov 2012 10:09:01 -0500
From:	Chris Ball <cjb@...top.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
	spear-devel@...t.st.com,
	Vipul Kumar Samar <vipulkumar.samar@...com>
Subject: Re: [PATCH 1/2] mmc: sdhci-spear: Initialize sdhci clk to 50 MHz

Hi,

On Thu, Nov 08 2012, Viresh Kumar wrote:
> From: Vipul Kumar Samar <vipulkumar.samar@...com>
>
> SPEAr sdhci driver expects the clock to be set to 50 MHz for proper functioning.
> This patch sets clk to 50 MHz in probe.
>
> Signed-off-by: Vipul Kumar Samar <vipulkumar.samar@...com>
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
> ---
>  drivers/mmc/host/sdhci-spear.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-spear.c b/drivers/mmc/host/sdhci-spear.c
> index 6be89c0..fea8bf9 100644
> --- a/drivers/mmc/host/sdhci-spear.c
> +++ b/drivers/mmc/host/sdhci-spear.c
> @@ -146,6 +146,11 @@ static int __devinit sdhci_probe(struct platform_device *pdev)
>  		goto put_clk;
>  	}
>  
> +	ret = clk_set_rate(sdhci->clk, 50000000);
> +	if (ret)
> +		dev_dbg(&pdev->dev, "Error setting desired clk, clk=%lu\n",
> +				clk_get_rate(sdhci->clk));
> +
>  	if (np) {
>  		sdhci->data = sdhci_probe_config_dt(pdev);
>  		if (IS_ERR(sdhci->data)) {

Can I change this to a dev_err()?  No-one's going to see a dev_dbg().

Thanks,

- Chris.
-- 
Chris Ball   <cjb@...top.org>   <http://printf.net/>
One Laptop Per Child
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