From 5bd2acdcdde22231057b12ee8978dd87c29ff322 Mon Sep 17 00:00:00 2001 From: Haibo Chen Date: Wed, 19 Feb 2020 16:25:49 +0800 Subject: mmc: sdhci-esdhc-imx: add strobe-dll-delay-target support strobe-dll-delay-target is the delay cell add on the strobe line. Strobe line the the uSDHC loopback read clock which is use in HS400 mode. Different strobe-dll-delay-target may need to set for different board/SoC. If this delay cell is not set to an appropriate value, we may see some read operation meet CRC error after HS400 mode select which already pass the tuning. This patch add the strobe-dll-delay-target setting in driver, so that user can easily config this delay cell in dts file. Signed-off-by: Haibo Chen Acked-by: Adrian Hunter Link: https://lore.kernel.org/r/1582100757-20683-1-git-send-email-haibo.chen@nxp.com Signed-off-by: Ulf Hansson --- include/linux/platform_data/mmc-esdhc-imx.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/platform_data') diff --git a/include/linux/platform_data/mmc-esdhc-imx.h b/include/linux/platform_data/mmc-esdhc-imx.h index 6c006078c8a1..0434f68eda86 100644 --- a/include/linux/platform_data/mmc-esdhc-imx.h +++ b/include/linux/platform_data/mmc-esdhc-imx.h @@ -37,5 +37,6 @@ struct esdhc_platform_data { unsigned int delay_line; unsigned int tuning_step; /* The delay cell steps in tuning procedure */ unsigned int tuning_start_tap; /* The start delay cell point in tuning procedure */ + unsigned int strobe_dll_delay_target; /* The delay cell for strobe pad (read clock) */ }; #endif /* __ASM_ARCH_IMX_ESDHC_H */ -- cgit v1.2.3