[U-Boot] [PATCH] mmc: Avoid HS400 mode when accessing boot partitions

From: Marek Vasut <marek.vasut@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] mmc: Avoid HS400 mode when accessing boot partitions
Date: Fri, 31 May 2019 15:22:44 +0200	[thread overview]
Message-ID: <20190531132244.29719-1-marek.vasut+renesas@gmail.com> (raw)

According to JEDEC JESD84-B51.pdf section 6.3.3 Boot operation ,
HS200 & HS400 mode is not supported during boot operation. The
U-Boot code currently only applies this restriction to HS200 mode,
extend this to HS400 mode as well.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Jean-Jacques Hiblot <jjhiblot@ti.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Cc: Peng Fan <peng.fan@nxp.com>
---
 drivers/mmc/mmc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 456c1b4cc9..71b52c6cf2 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -905,14 +905,14 @@ static int mmc_set_capacity(struct mmc *mmc, int part_num)
 	return 0;
 }
 
-#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
+#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
 static int mmc_boot_part_access_chk(struct mmc *mmc, unsigned int part_num)
 {
 	int forbidden = 0;
 	bool change = false;
 
 	if (part_num & PART_ACCESS_MASK)
-		forbidden = MMC_CAP(MMC_HS_200);
+		forbidden = MMC_CAP(MMC_HS_200) | MMC_CAP(MMC_HS_400);
 
 	if (MMC_CAP(mmc->selected_mode) & forbidden) {
 		pr_debug("selected mode (%s) is forbidden for part %d\n",
-- 
2.20.1
