diff options
| author | Pavan Kunapuli <pkunapuli@nvidia.com> | 2011-05-23 18:36:28 +0530 |
|---|---|---|
| committer | Niket Sirsi <nsirsi@nvidia.com> | 2011-05-25 15:19:02 -0700 |
| commit | 29a0bbf8eb833879ea46d7af526e84706b2991c9 (patch) | |
| tree | f454d121c1329d4ddc67d8cb19f13dbb739cb791 | |
| parent | ceb2e2c8b6a7d41c8917fcd49c7b0da745767931 (diff) | |
sdhci: tegra: Configure sdmmc drive strengths
Configure the pull up and pull down drive strengths for sdmmc.
Bug 822057
Change-Id: Ic483f5311cdfdb6c35043ab33b5ff22462304de3
Reviewed-on: http://git-master/r/32607
Reviewed-by: Pavan Kunapuli <pkunapuli@nvidia.com>
Tested-by: Pavan Kunapuli <pkunapuli@nvidia.com>
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
| -rw-r--r-- | drivers/mmc/host/sdhci-tegra.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index fc720711b6bc..bed414b4f5b8 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -56,6 +56,9 @@ #define SDMMC_AUTO_CAL_CONFIG 0x1E4 #define SDMMC_AUTO_CAL_CONFIG_AUTO_CAL_ENABLE 0x20000000 +#define SDMMC_AUTO_CAL_CONFIG_AUTO_CAL_PD_OFFSET_SHIFT 0x8 +#define SDMMC_AUTO_CAL_CONFIG_AUTO_CAL_PD_OFFSET 0x70 +#define SDMMC_AUTO_CAL_CONFIG_AUTO_CAL_PU_OFFSET 0x62 #endif struct tegra_sdhci_host { @@ -213,8 +216,14 @@ static void tegra_sdhci_set_signalling_voltage(struct sdhci_host *sdhci, /* Do Auto Calibration */ val = sdhci_readl(sdhci, SDMMC_AUTO_CAL_CONFIG); val |= SDMMC_AUTO_CAL_CONFIG_AUTO_CAL_ENABLE; + /* Program Auto cal PD offset(bits 8:14) */ + val &= ~(0x7F << SDMMC_AUTO_CAL_CONFIG_AUTO_CAL_PD_OFFSET_SHIFT); + val |= (SDMMC_AUTO_CAL_CONFIG_AUTO_CAL_PD_OFFSET << + SDMMC_AUTO_CAL_CONFIG_AUTO_CAL_PD_OFFSET_SHIFT); + /* Program Auto cal PU offset(bits 0:6) */ + val &= ~0x7F; + val |= SDMMC_AUTO_CAL_CONFIG_AUTO_CAL_PU_OFFSET; sdhci_writel(sdhci, val, SDMMC_AUTO_CAL_CONFIG); - } #endif } |