From 8024379e0ae43b1154978c2291ce20f772cbb3bd Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Mon, 6 Oct 2014 15:23:07 +0300 Subject: [PATCH] mmc: sdhci-acpi: Fix Braswell eMMC timeout clock frequency Braswell eMMC host controller specifies an incorrect timeout clock frequncy in the capabilities registers. The correct value is 1 MHz. A similar fix was done for sdhci-pci, however in the sdhci-acpi case the HID/UID is not unique so the capabilities register values are matched also. Signed-off-by: Adrian Hunter Signed-off-by: Ulf Hansson --- drivers/mmc/host/sdhci-acpi.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c index 7548261221b5..9cccc0e89b04 100644 --- a/drivers/mmc/host/sdhci-acpi.c +++ b/drivers/mmc/host/sdhci-acpi.c @@ -137,6 +137,11 @@ static int sdhci_acpi_emmc_probe_slot(struct platform_device *pdev, /* Platform specific code during emmc proble slot goes here */ + if (hid && uid && !strcmp(hid, "80860F14") && !strcmp(uid, "1") && + sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 && + sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807) + host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */ + return 0; } -- GitLab