From: Heiner Kallweit <hkallweit1@gmail.com>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Carlo Caione <carlo@caione.org>,
Kevin Hilman <khilman@baylibre.com>,
linux-mmc@vger.kernel.org
Subject: [PATCH 9/9] mmc: meson-gx: add support for HS400 mode
Date: Tue, 31 Jan 2017 21:59:03 +0100 [thread overview]
Message-ID: <d2016e6d-81d7-57ed-0333-3972b948f651@gmail.com> (raw)
In-Reply-To: <24e8bf35-50ce-270d-c0aa-12bb90d2e3d8@gmail.com>
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 bc787444..83a94cf5 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
prev parent reply other threads:[~2017-01-31 21:08 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <24e8bf35-50ce-270d-c0aa-12bb90d2e3d8@gmail.com>
2017-01-31 20:57 ` [PATCH 2/9] mmc: meson-gx: minor improvements in meson_mmc_set_ios Heiner Kallweit
2017-02-01 11:55 ` Jaehoon Chung
2017-02-01 20:16 ` Heiner Kallweit
2017-02-03 13:52 ` Kevin Hilman
2017-01-31 20:58 ` [PATCH 3/9] mmc: meson-gx: improve meson_mmc_clk_set Heiner Kallweit
2017-02-01 12:24 ` Jaehoon Chung
2017-02-01 20:29 ` Heiner Kallweit
2017-02-02 9:09 ` Ulf Hansson
2017-01-31 20:58 ` [PATCH 4/9] mmc: meson-gx: improve meson_mmc_irq_thread Heiner Kallweit
2017-01-31 20:58 ` [PATCH 5/9] mmc: meson-gx: improve interrupt handling Heiner Kallweit
2017-01-31 20:58 ` [PATCH 6/9] mmc: meson-gx: set max block count and request size Heiner Kallweit
2017-01-31 20:58 ` [PATCH 7/9] mmc: meson-gx: reduce bounce buffer size Heiner Kallweit
2017-01-31 20:58 ` [PATCH 8/9] mmc: meson-gx: remove unneeded checks in remove Heiner Kallweit
2017-01-31 20:59 ` Heiner Kallweit [this message]
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