From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jaehoon Chung Date: Wed, 21 May 2014 11:20:52 +0900 Subject: [U-Boot] [PATCHv5 09/14] mmc: support the DDR mode for eMMC In-Reply-To: <537B84B6.2040401@digi.com> References: <1400216399-26721-1-git-send-email-jh80.chung@samsung.com> <1400216399-26721-10-git-send-email-jh80.chung@samsung.com> <537B84B6.2040401@digi.com> Message-ID: <537C0D84.70006@samsung.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi, Hector. On 05/21/2014 01:37 AM, Hector Palacios wrote: > Hi, > > On 05/16/2014 06:59 AM, Jaehoon Chung wrote: >> Signed-off-by: Jaehoon Chung >> Tested-by: Lukasz Majewski >> Acked-by: Lukasz Majewski > > What platforms did you test DDR mode on? I have tested DDR mode with exynos board. > I tried this on an Freescale i.MX6 based platform but the driver returned error code COM_ERR (-18) when trying to switch to any of the DDR modes. I guess the fsl_esdhc.c driver needs some adaptation for DDR to work. I didn't know how work DDR mode at fsl_esdhc.c.(If you share the host controller TRM, it's helpful to me.) Host controller also need to change the DDR mode. I wonder your board didn't work not to enable the DDR mode? Best Regards, Jaehoon Chung > > Best regards, > -- > Hector Palacios >