From: Adrian Hunter Date: Thu, 26 Nov 2015 12:00:45 +0000 (+0200) Subject: mmc: sdhci-pci: Do not default to 33 Ohm driver strength for Intel SPT X-Git-Tag: firefly_0821_release~176^2~475^2~285 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4a3d7e16b0f4729151f41061f5fc9cf91279b997;p=firefly-linux-kernel-4.4.55.git mmc: sdhci-pci: Do not default to 33 Ohm driver strength for Intel SPT commit 1ca896856281d3f1ad4f6f7d4e32e2943452de23 upstream. 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 Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c index cf7ad458b4f4..08f4a9fe8550 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 */