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    Subject[PATCH 5.4 067/147] mmc: sdhci-pci-gli: Fix can not access GL9750 after reboot from Windows 10
    Date
    From: Ben Chuang <ben.chuang@genesyslogic.com.tw>

    [ Upstream commit b56ff195c317ad28c05d354aeecbb9995b8e08c1 ]

    Need to clear some bits in a vendor-defined register after reboot from
    Windows 10.

    Fixes: e51df6ce668a ("mmc: host: sdhci-pci: Add Genesys Logic GL975x support")
    Reported-by: Grzegorz Kowal <custos.mentis@gmail.com>
    Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
    Acked-by: Adrian Hunter <adrian.hunter@intel.com>
    Tested-by: Grzegorz Kowal <custos.mentis@gmail.com>
    Link: https://lore.kernel.org/r/20200504063957.6638-1-benchuanggli@gmail.com
    Cc: stable@vger.kernel.org
    Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/mmc/host/sdhci-pci-gli.c | 5 +++++
    1 file changed, 5 insertions(+)

    diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
    index ff39d81a5742c..fd76aa672e020 100644
    --- a/drivers/mmc/host/sdhci-pci-gli.c
    +++ b/drivers/mmc/host/sdhci-pci-gli.c
    @@ -26,6 +26,9 @@
    #define SDHCI_GLI_9750_DRIVING_2 GENMASK(27, 26)
    #define GLI_9750_DRIVING_1_VALUE 0xFFF
    #define GLI_9750_DRIVING_2_VALUE 0x3
    +#define SDHCI_GLI_9750_SEL_1 BIT(29)
    +#define SDHCI_GLI_9750_SEL_2 BIT(31)
    +#define SDHCI_GLI_9750_ALL_RST (BIT(24)|BIT(25)|BIT(28)|BIT(30))

    #define SDHCI_GLI_9750_PLL 0x864
    #define SDHCI_GLI_9750_PLL_TX2_INV BIT(23)
    @@ -122,6 +125,8 @@ static void gli_set_9750(struct sdhci_host *host)
    GLI_9750_DRIVING_1_VALUE);
    driving_value |= FIELD_PREP(SDHCI_GLI_9750_DRIVING_2,
    GLI_9750_DRIVING_2_VALUE);
    + driving_value &= ~(SDHCI_GLI_9750_SEL_1|SDHCI_GLI_9750_SEL_2|SDHCI_GLI_9750_ALL_RST);
    + driving_value |= SDHCI_GLI_9750_SEL_2;
    sdhci_writel(host, driving_value, SDHCI_GLI_9750_DRIVING);

    sw_ctrl_value &= ~SDHCI_GLI_9750_SW_CTRL_4;
    --
    2.20.1


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