[U-Boot] [PATCH] i.MX6 USDHC: Use the ESDHC clock

[Stefano Babic]

On 14/06/2012 15:44, Dirk Behme wrote:
> From: Michael Langer <michael.langer at de.bosch.com>
> 
> The commit "i.mx: fsl_esdhc: add the i.mx6q support" (4692708d) introduces
> support for the i.MX6Q MMC host controller USDHC.
> 
> MXC_IPG_PERCLK sets the clock to 66MHz. This seems to be the default clock
> of the ESDHC IP found in < i.MX6 silicon. However, the default clock for the USDHC
> IP found in i.MX6 is 200MHz (MXC_ESDHC_CLK). This difference will cause a 3 times
> higher clock on SD_CLK than expected (see fsl_esdh.c -> set_sysctl()).
> 
> Signed-off-by: Michael Langer <michael.langer at de.bosch.com>
> CC: Stefano Babic <sbabic at denx.de>
> CC: Jason Liu <r64343 at freescale.com>
> ---
>  arch/arm/cpu/armv7/imx-common/speed.c |    4 ++++
>  1 files changed, 4 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/cpu/armv7/imx-common/speed.c b/arch/arm/cpu/armv7/imx-common/speed.c
> index 2187e8e..80989c4 100644
> --- a/arch/arm/cpu/armv7/imx-common/speed.c
> +++ b/arch/arm/cpu/armv7/imx-common/speed.c
> @@ -35,7 +35,11 @@ DECLARE_GLOBAL_DATA_PTR;
>  int get_clocks(void)
>  {
>  #ifdef CONFIG_FSL_ESDHC
> +#ifdef CONFIG_FSL_USDHC
> +	gd->sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
> +#else
>  	gd->sdhc_clk = mxc_get_clock(MXC_IPG_PERCLK);
>  #endif
> +#endif
>  	return 0;
>  }

Acked-by: Stefano Babic <sbabic at denx.de>

Best regards,
Stefano Babic

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