linux-kernel - [PATCH 3/4] mmc: mmc: enable ios.enhanced_strobe before mmc_set

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Message-Id: <1482213199-29152-4-git-send-email-riteshh@codeaurora.org>
Date:   Tue, 20 Dec 2016 11:23:18 +0530
From:   Ritesh Harjani <riteshh@...eaurora.org>
To:     ulf.hansson@...aro.org, adrian.hunter@...el.com
Cc:     linux-mmc@...r.kernel.org, shawn.lin@...k-chips.com,
        linux-kernel@...r.kernel.org, stummala@...eaurora.org,
        georgi.djakov@...aro.org, linux-arm-msm@...r.kernel.org,
        pramod.gurav@...aro.org, jeremymc@...hat.com,
        venkatg@...eaurora.org, asutoshd@...eaurora.org,
        Ritesh Harjani <riteshh@...eaurora.org>
Subject: [PATCH 3/4] mmc: mmc: enable ios.enhanced_strobe before mmc_set_timing

Some controllers may need to configure few registers based on enhanced
strobe mode while configuring to HS400 timing, thus make
ios.enhanced_strobe to true before mmc_set_timing in mmc_select_hs400es.

Signed-off-by: Ritesh Harjani <riteshh@...eaurora.org>
---
 drivers/mmc/core/mmc.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index eb69497..052368e 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1327,12 +1327,18 @@ static int mmc_select_hs400es(struct mmc_card *card)
 		goto out_err;
 	}
 
+	/*
+	 * Enable enhanced_strobe in ios, as some controllers
+	 * may need to configure few registers based on enhanced
+	 * strobe while changing HS400 timing.
+	 */
+	host->ios.enhanced_strobe = true;
+
 	/* Set host controller to HS400 timing and frequency */
 	mmc_set_timing(host, MMC_TIMING_MMC_HS400);
 	mmc_set_bus_speed(card);
 
 	/* Controller enable enhanced strobe function */
-	host->ios.enhanced_strobe = true;
 	if (host->ops->hs400_enhanced_strobe)
 		host->ops->hs400_enhanced_strobe(host, &host->ios);
 
-- 
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