From 5c23712dbdeeaef84ee28a18dc23abd479a95ede Mon Sep 17 00:00:00 2001 From: Michael Langer Date: Thu, 14 Jun 2012 03:44:33 +0000 Subject: [PATCH] i.MX6 USDHC: Use the ESDHC clock 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 CC: Stefano Babic CC: Jason Liu Acked-by: Stefano Babic --- arch/arm/cpu/armv7/imx-common/speed.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm/cpu/armv7/imx-common/speed.c b/arch/arm/cpu/armv7/imx-common/speed.c index 2187e8ee5d..80989c4983 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; } -- 2.25.1