From: Ben Chuang <benchuanggli@gmail.com>
To: ulf.hansson@linaro.org, adrian.hunter@intel.com
Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
ben.chuang@genesyslogic.com.tw,
Ben Chuang <benchuanggli@gmail.com>
Subject: [PATCH] mmc: sdhci-pci-gli: Disable slow mode in HS400 mode for GL9763E
Date: Wed, 25 Nov 2020 18:00:04 +0800 [thread overview]
Message-ID: <20201125100004.1288-1-benchuanggli@gmail.com> (raw)
From: Ben Chuang <ben.chuang@genesyslogic.com.tw>
The GL9763E uses 150Mhz (slow mode) by default in HS400 mode. In order
to make HS400 mode run at 200Mhz, the slow mode needs to be turned off.
Fixes: 1ae1d2d6e555 ("mmc: sdhci-pci-gli: Add Genesys Logic GL9763E support")
Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
---
drivers/mmc/host/sdhci-pci-gli.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
index 9887485a4134..d45d7e529150 100644
--- a/drivers/mmc/host/sdhci-pci-gli.c
+++ b/drivers/mmc/host/sdhci-pci-gli.c
@@ -87,6 +87,9 @@
#define PCIE_GLI_9763E_SCR 0x8E0
#define GLI_9763E_SCR_AXI_REQ BIT(9)
+#define PCIE_GLI_9763E_MMC_CTRL 0x960
+#define GLI_9763E_HS400_SLOW BIT(3)
+
#define SDHCI_GLI_9763E_CQE_BASE_ADDR 0x200
#define GLI_9763E_CQE_TRNS_MODE (SDHCI_TRNS_MULTI | \
SDHCI_TRNS_BLK_CNT_EN | \
@@ -764,6 +767,10 @@ static void gli_set_gl9763e(struct sdhci_pci_slot *slot)
value |= GLI_9763E_SCR_AXI_REQ;
pci_write_config_dword(pdev, PCIE_GLI_9763E_SCR, value);
+ pci_read_config_dword(pdev, PCIE_GLI_9763E_MMC_CTRL, &value);
+ value &= ~GLI_9763E_HS400_SLOW;
+ pci_write_config_dword(pdev, PCIE_GLI_9763E_MMC_CTRL, value);
+
pci_read_config_dword(pdev, PCIE_GLI_9763E_VHS, &value);
value &= ~GLI_9763E_VHS_REV;
value |= FIELD_PREP(GLI_9763E_VHS_REV, GLI_9763E_VHS_REV_R);
--
2.29.2
next reply other threads:[~2020-11-25 10:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-25 10:00 Ben Chuang [this message]
2020-11-25 10:03 ` Ulf Hansson
2020-11-25 10:43 ` Ben Chuang
2020-11-25 10:49 ` Ulf Hansson
2020-11-25 10:55 ` Ben Chuang
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