From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Babic Date: Fri, 15 Jun 2012 16:33:12 +0200 Subject: [U-Boot] [PATCH] i.MX6 USDHC: Use the ESDHC clock In-Reply-To: <1339681473-2435-1-git-send-email-dirk.behme@de.bosch.com> References: <1339681473-2435-1-git-send-email-dirk.behme@de.bosch.com> Message-ID: <4FDB47A8.7030809@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On 14/06/2012 15:44, Dirk Behme wrote: > From: Michael Langer > > 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 > --- > 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 Best regards, Stefano Babic -- ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de =====================================================================