From ecfb0ff81295933584da136da792c317063f7bcc Mon Sep 17 00:00:00 2001 From: Marek Vasut <marex@denx.de> Date: Fri, 23 Oct 2015 20:46:29 +0200 Subject: [PATCH] mmc: atmel: Fix clock configuration MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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@denx.de> Reviewed-by: Andreas BieÃmann <andreas.devel@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 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; } -- 2.39.5