From: Ritesh Harjani <riteshh@codeaurora.org>
To: ulf.hansson@linaro.org, adrian.hunter@intel.com
Cc: linux-mmc@vger.kernel.org, shawn.lin@rock-chips.com,
linux-kernel@vger.kernel.org, stummala@codeaurora.org,
georgi.djakov@linaro.org, linux-arm-msm@vger.kernel.org,
pramod.gurav@linaro.org, jeremymc@redhat.com,
venkatg@codeaurora.org, asutoshd@codeaurora.org,
Ritesh Harjani <riteshh@codeaurora.org>
Subject: [PATCH 3/4] mmc: mmc: enable ios.enhanced_strobe before mmc_set_timing
Date: Tue, 20 Dec 2016 11:23:18 +0530 [thread overview]
Message-ID: <1482213199-29152-4-git-send-email-riteshh@codeaurora.org> (raw)
In-Reply-To: <1482213199-29152-1-git-send-email-riteshh@codeaurora.org>
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@codeaurora.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);
--
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project.
next prev parent reply other threads:[~2016-12-20 5:53 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-20 5:53 [PATCH 0/4] mmc: Provide enhanced strobe support for sdhci-msm Ritesh Harjani
2016-12-20 5:53 ` [PATCH 1/4] mmc: core: Return from mmc_set_clock if hz is already set to ios.clock Ritesh Harjani
2016-12-20 5:53 ` [PATCH 2/4] mmc: mmc: Add change to set controller to HS400 frequency in enhanced strobe Ritesh Harjani
2016-12-20 7:29 ` Shawn Lin
2016-12-20 10:33 ` Ritesh Harjani
2016-12-20 11:03 ` Shawn Lin
2016-12-20 12:08 ` Ritesh Harjani
2016-12-20 5:53 ` Ritesh Harjani [this message]
2016-12-23 9:18 ` [PATCH 3/4] mmc: mmc: enable ios.enhanced_strobe before mmc_set_timing Ritesh Harjani
2016-12-26 7:12 ` Shawn Lin
2016-12-20 5:53 ` [PATCH 4/4] mmc: sdhci-msm: provide enhanced_strobe mode feature support Ritesh Harjani
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