From 8c0ec0dbc4cce76c6c745858116a404791d28b8b Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Fri, 2 Nov 2012 06:56:12 +0000 Subject: [PATCH] mmc: tegra: support 4-bit operation too on 8-bit slots If a board has all 8 data lines routed, the SD/MMC controller can still operate in 4-bit (or presumably even 1-bit) mode. Adjust Tegra's MMC driver to report the 4-bit capability even for 8-bit slots. Signed-off-by: Stephen Warren Signed-off-by: Tom Warren --- drivers/mmc/tegra_mmc.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/mmc/tegra_mmc.c b/drivers/mmc/tegra_mmc.c index 8fea6a6..1fd5592 100644 --- a/drivers/mmc/tegra_mmc.c +++ b/drivers/mmc/tegra_mmc.c @@ -547,10 +547,11 @@ int tegra_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio) mmc->getcd = tegra_mmc_getcd; mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195; + mmc->host_caps = 0; if (bus_width == 8) - mmc->host_caps = MMC_MODE_8BIT; - else - mmc->host_caps = MMC_MODE_4BIT; + mmc->host_caps |= MMC_MODE_8BIT; + if (bus_width >= 4) + mmc->host_caps |= MMC_MODE_4BIT; mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_HC; /*