From 1ca896856281d3f1ad4f6f7d4e32e2943452de23 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Thu, 26 Nov 2015 14:00:45 +0200 Subject: [PATCH] mmc: sdhci-pci: Do not default to 33 Ohm driver strength for Intel SPT In some cases, the stronger 33 Ohm driver strength must not be used so it is not a suitable default. Change it to the standard default 50 Ohm value. The patch applies to v4.2+ except the file name changed. It is drivers/mmc/host/sdhci-pci.c prior to v.4.4. Signed-off-by: Adrian Hunter Cc: stable@vger.kernel.org # v4.2+ Signed-off-by: Ulf Hansson --- drivers/mmc/host/sdhci-pci-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c index cf7ad45..08f4a9f 100644 --- a/drivers/mmc/host/sdhci-pci-core.c +++ b/drivers/mmc/host/sdhci-pci-core.c @@ -277,7 +277,7 @@ static int spt_select_drive_strength(struct sdhci_host *host, if (sdhci_pci_spt_drive_strength > 0) drive_strength = sdhci_pci_spt_drive_strength & 0xf; else - drive_strength = 1; /* 33-ohm */ + drive_strength = 0; /* Default 50-ohm */ if ((mmc_driver_type_mask(drive_strength) & card_drv) == 0) drive_strength = 0; /* Default 50-ohm */ -- 2.7.4