diff options
| author | Stephen Warren <swarren@nvidia.com> | 2012-11-02 06:56:12 +0000 |
|---|---|---|
| committer | Tom Warren <twarren@nvidia.com> | 2012-11-19 08:15:41 -0700 |
| commit | 8c0ec0dbc4cce76c6c745858116a404791d28b8b (patch) | |
| tree | 55c23dfce6198765ceabdba1244db74832dc506e | |
| parent | 1ed0b51b7d58bfcf1901005fb98591bbdb9e30e3 (diff) | |
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 <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
| -rw-r--r-- | drivers/mmc/tegra_mmc.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/mmc/tegra_mmc.c b/drivers/mmc/tegra_mmc.c index 8fea6a6bfb..1fd5592f2d 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; /* |