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Commit e63e1c67 authored by Wenchao Chen's avatar Wenchao Chen Committed by Greg Kroah-Hartman
Browse files

mmc: sdhci-sprd: Disable CLK_AUTO when the clock is less than 400K 



commit ff874dbc4f868af128b412a9bd92637103cf11d7 upstream.

When the clock is less than 400K, some SD cards fail to initialize
because CLK_AUTO is enabled.

Fixes: fb8bd90f ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller")
Signed-off-by: default avatarWenchao Chen <wenchao.chen@unisoc.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20221207051909.32126-1-wenchao.chen@unisoc.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3de2c362

drivers/mmc/host/sdhci-sprd.c

+9 −7
Original line number Diff line number Diff line
@@ -223,7 +223,8 @@ static inline void _sdhci_sprd_set_clock(struct sdhci_host *host, 
	div = ((div & 0x300) >> 2) | ((div & 0xFF) << 8);

	sdhci_enable_clk(host, div);



	/* enable auto gate sdhc_enable_auto_gate */

	/* Enable CLK_AUTO when the clock is greater than 400K. */

	if (clk > 400000) {

		val = sdhci_readl(host, SDHCI_SPRD_REG_32_BUSY_POSI);

		mask = SDHCI_SPRD_BIT_OUTR_CLK_AUTO_EN |

			SDHCI_SPRD_BIT_INNR_CLK_AUTO_EN;
@@ -232,6 +233,7 @@ static inline void _sdhci_sprd_set_clock(struct sdhci_host *host, 
			sdhci_writel(host, val, SDHCI_SPRD_REG_32_BUSY_POSI);

		}

	}

}



static void sdhci_sprd_enable_phy_dll(struct sdhci_host *host)

{