diff options
| -rw-r--r-- | drivers/mmc/host/sdhci-of-at91.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-of-at91.c b/drivers/mmc/host/sdhci-of-at91.c index e7d1920729fb..9571c4a882a9 100644 --- a/drivers/mmc/host/sdhci-of-at91.c +++ b/drivers/mmc/host/sdhci-of-at91.c @@ -27,6 +27,9 @@ #define SDMMC_CACR 0x230 #define SDMMC_CACR_CAPWREN BIT(0) #define SDMMC_CACR_KEY (0x46 << 8) +#define SDMMC_CALCR 0x240 +#define SDMMC_CALCR_EN BIT(0) +#define SDMMC_CALCR_ALWYSON BIT(4) #define SDHCI_AT91_PRESET_COMMON_CONF 0x400 /* drv type B, programmable clock mode */ @@ -35,6 +38,7 @@ struct sdhci_at91_priv { struct clk *gck; struct clk *mainck; bool restore_needed; + bool cal_always_on; }; static void sdhci_at91_set_force_card_detect(struct sdhci_host *host) @@ -116,10 +120,17 @@ static void sdhci_at91_set_uhs_signaling(struct sdhci_host *host, static void sdhci_at91_reset(struct sdhci_host *host, u8 mask) { + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_at91_priv *priv = sdhci_pltfm_priv(pltfm_host); + sdhci_reset(host, mask); if (host->mmc->caps & MMC_CAP_NONREMOVABLE) sdhci_at91_set_force_card_detect(host); + + if (priv->cal_always_on && (mask & SDHCI_RESET_ALL)) + sdhci_writel(host, SDMMC_CALCR_ALWYSON | SDMMC_CALCR_EN, + SDMMC_CALCR); } static const struct sdhci_ops sdhci_at91_sama5d2_ops = { @@ -345,6 +356,14 @@ static int sdhci_at91_probe(struct platform_device *pdev) priv->restore_needed = false; + /* + * if SDCAL pin is wrongly connected, we must enable + * the analog calibration cell permanently. + */ + priv->cal_always_on = + device_property_read_bool(&pdev->dev, + "microchip,sdcal-inverted"); + ret = mmc_of_parse(host->mmc); if (ret) goto clocks_disable_unprepare; |