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From: hkallweit1@gmail.com (Heiner Kallweit)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] mmc: meson-gx: add support for HS400 mode
Date: Thu, 26 Jan 2017 23:12:38 +0100	[thread overview]
Message-ID: <f7f325ec-6099-7f51-5bb4-24ac24073ee7@gmail.com> (raw)

Add support for HS400 mode.

Successfully tested on a Odroid C2 (S905 GXBB).

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/mmc/host/meson-gx-mmc.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index 030425be..be45d57d 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -83,6 +83,7 @@
 #define   CFG_RC_CC_MASK 0xf
 #define   CFG_STOP_CLOCK BIT(22)
 #define   CFG_CLK_ALWAYS_ON BIT(18)
+#define   CFG_CHK_DS BIT(20)
 #define   CFG_AUTO_CLK BIT(23)
 
 #define SD_EMMC_STATUS 0x48
@@ -412,6 +413,16 @@ static void meson_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	val &= ~(CFG_RC_CC_MASK << CFG_RC_CC_SHIFT);
 	val |= ilog2(SD_EMMC_CFG_CMD_GAP) << CFG_RC_CC_SHIFT;
 
+	val &= ~CFG_DDR;
+	if (ios->timing == MMC_TIMING_UHS_DDR50 ||
+	    ios->timing == MMC_TIMING_MMC_DDR52 ||
+	    ios->timing == MMC_TIMING_MMC_HS400)
+		val |= CFG_DDR;
+
+	val &= ~CFG_CHK_DS;
+	if (ios->timing == MMC_TIMING_MMC_HS400)
+		val |= CFG_CHK_DS;
+
 	writel(val, host->regs + SD_EMMC_CFG);
 
 	if (val != orig)
-- 
2.11.0

WARNING: multiple messages have this Message-ID (diff)
From: hkallweit1@gmail.com (Heiner Kallweit)
To: linus-amlogic@lists.infradead.org
Subject: [PATCH] mmc: meson-gx: add support for HS400 mode
Date: Thu, 26 Jan 2017 23:12:38 +0100	[thread overview]
Message-ID: <f7f325ec-6099-7f51-5bb4-24ac24073ee7@gmail.com> (raw)

Add support for HS400 mode.

Successfully tested on a Odroid C2 (S905 GXBB).

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/mmc/host/meson-gx-mmc.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index 030425be..be45d57d 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -83,6 +83,7 @@
 #define   CFG_RC_CC_MASK 0xf
 #define   CFG_STOP_CLOCK BIT(22)
 #define   CFG_CLK_ALWAYS_ON BIT(18)
+#define   CFG_CHK_DS BIT(20)
 #define   CFG_AUTO_CLK BIT(23)
 
 #define SD_EMMC_STATUS 0x48
@@ -412,6 +413,16 @@ static void meson_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	val &= ~(CFG_RC_CC_MASK << CFG_RC_CC_SHIFT);
 	val |= ilog2(SD_EMMC_CFG_CMD_GAP) << CFG_RC_CC_SHIFT;
 
+	val &= ~CFG_DDR;
+	if (ios->timing == MMC_TIMING_UHS_DDR50 ||
+	    ios->timing == MMC_TIMING_MMC_DDR52 ||
+	    ios->timing == MMC_TIMING_MMC_HS400)
+		val |= CFG_DDR;
+
+	val &= ~CFG_CHK_DS;
+	if (ios->timing == MMC_TIMING_MMC_HS400)
+		val |= CFG_CHK_DS;
+
 	writel(val, host->regs + SD_EMMC_CFG);
 
 	if (val != orig)
-- 
2.11.0

             reply	other threads:[~2017-01-26 22:12 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-26 22:12 Heiner Kallweit [this message]
2017-01-26 22:12 ` [PATCH] mmc: meson-gx: add support for HS400 mode Heiner Kallweit
2017-01-27 18:55 ` Kevin Hilman
2017-01-27 18:55   ` Kevin Hilman
2017-02-06  9:32   ` Neil Armstrong
2017-02-06  9:32     ` Neil Armstrong
2017-02-06 18:28     ` Heiner Kallweit
2017-02-06 18:28       ` Heiner Kallweit

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