From 81ac2af65793ecfbd79875d45043ff4adc0982b8 Mon Sep 17 00:00:00 2001 From: Shawn Lin Date: Thu, 26 May 2016 09:56:22 +0800 Subject: mmc: core: implement enhanced strobe support Controllers use data strobe line to latch data from devices under hs400 mode, but not for cmd line. So since emmc 5.1, JEDEC introduces enhanced strobe mode for latching cmd response from emmc devices to host controllers. This new feature is optional, so it depends both on device's cap and host's cap to decide whether to use it or not. Signed-off-by: Shawn Lin Reviewed-by: Jaehoon Chung Tested-by: Douglas Anderson Tested-by: Jaehoon Chung Acked-by: Adrian Hunter Signed-off-by: Ulf Hansson --- include/linux/mmc/card.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/mmc/card.h') diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index eb0151bac50c..22defc2a83b7 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -95,6 +95,7 @@ struct mmc_ext_csd { u8 raw_partition_support; /* 160 */ u8 raw_rpmb_size_mult; /* 168 */ u8 raw_erased_mem_count; /* 181 */ + u8 strobe_support; /* 184 */ u8 raw_ext_csd_structure; /* 194 */ u8 raw_card_type; /* 196 */ u8 raw_driver_strength; /* 197 */ -- cgit v1.2.3