linux-kernel - Re: [PATCH 1/2] rtc-imxdi: Support for i.MX53

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Date:	Tue, 16 Oct 2012 22:15:28 +0200
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	Roland Stigge <stigge@...com.de>
Cc:	a.zummo@...ertech.it, grant.likely@...retlab.ca,
	rob.herring@...xeda.com, rtc-linux@...glegroups.com,
	linux-kernel@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH 1/2] rtc-imxdi: Support for i.MX53

On Tue, Oct 16, 2012 at 04:51:34PM +0200, Roland Stigge wrote:
> This patch enables support for i.MX53 in addition to i.MX25
> 
> Signed-off-by: Roland Stigge <stigge@...com.de>
> ---
>  drivers/rtc/Kconfig     |    2 +-
>  drivers/rtc/rtc-imxdi.c |   25 ++++++++++++++++---------
>  2 files changed, 17 insertions(+), 10 deletions(-)
> 
> --- linux-2.6.orig/drivers/rtc/Kconfig
> +++ linux-2.6/drivers/rtc/Kconfig
> @@ -768,7 +768,7 @@ config RTC_DRV_DAVINCI
>  
>  config RTC_DRV_IMXDI
>  	tristate "Freescale IMX DryIce Real Time Clock"
> -	depends on SOC_IMX25
> +	depends on SOC_IMX25 || SOC_IMX53

Please do not add new SoC dependencies. Use ARCH_MXC as a dependency
instead.

> +	/* For IMX53, RTC is available always */
> +	if (cpu_is_mx25()) {
> +		imxdi->clk = clk_get(&pdev->dev, NULL);
> +		if (IS_ERR(imxdi->clk))
> +			return PTR_ERR(imxdi->clk);
> +		clk_prepare_enable(imxdi->clk);
> +	}

No new users of cpu_is_* macros please. Provide a dummy clock
for i.MX53 instead.

Sascha

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