[U-Boot] [PATCH 2/4] mmc: atmel: Fix clock configuration

[Andreas Bießmann]

On 23.10.15 20:46, Marek Vasut wrote:
> After silencing the prints which were generated when reconfiguring the
> clock of the SD/MMC bus, surprisingly, the driver stopped working such
> that every attempt to use the SD/MMC bus caused the CPU to get totally
> stuck hard. It turns out that the prints generated a short delay, which
> was necessary for the CPU to reconfigure the clock without getting stuck.
> Thus, this patch adds a short delay after the clock configuration instead.
> 
> Signed-off-by: Marek Vasut <marex at denx.de>

Reviewed-by: Andreas Bießmann <andreas.devel at googlemail.com>

> ---
>  drivers/mmc/gen_atmel_mci.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/mmc/gen_atmel_mci.c b/drivers/mmc/gen_atmel_mci.c
> index 2815e57..8b05fcd 100644
> --- a/drivers/mmc/gen_atmel_mci.c
> +++ b/drivers/mmc/gen_atmel_mci.c
> @@ -113,6 +113,8 @@ static void mci_set_mode(struct mmc *mmc, u32 hz, u32 blklen)
>  	if (mmc->card_caps & mmc->cfg->host_caps & MMC_MODE_HS)
>  		writel(MMCI_BIT(HSMODE), &mci->cfg);
>  
> +	udelay(50);
> +
>  	initialized = 1;
>  }
>  
>