From: Marek Vasut Date: Fri, 23 Oct 2015 18:46:29 +0000 (+0200) Subject: mmc: atmel: Fix clock configuration X-Git-Tag: v2016.01-rc1~148 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=ecfb0ff81295933584da136da792c317063f7bcc;p=oweals%2Fu-boot.git mmc: atmel: Fix clock configuration 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 Reviewed-by: Andreas Bießmann --- diff --git a/drivers/mmc/gen_atmel_mci.c b/drivers/mmc/gen_atmel_mci.c index a67fb50199..eb12bd0419 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; }