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Date: Tue, 01 Mar 2016 23:54:42 +0000 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: <linux-kernel@...r.kernel.org> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, <stable@...r.kernel.org>, Adrian Hunter <adrian.hunter@...el.com>, Ulf Hansson <ulf.hansson@...aro.org> Subject: [PATCH 4.4 133/342] mmc: sdhci-pci: Do not default to 33 Ohm driver strength for Intel SPT 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Adrian Hunter <adrian.hunter@...el.com> 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 <adrian.hunter@...el.com> Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/mmc/host/sdhci-pci-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- 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(str 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 */
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