diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index 5e6f6c951fd4..23dda8b2b7f0 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -63,6 +63,7 @@ #define CORE_IO_PAD_PWR_SWITCH_EN (1 << 15) #define CORE_IO_PAD_PWR_SWITCH (1 << 16) #define CORE_HC_SELECT_IN_EN BIT(18) +#define CORE_HC_SELECT_IN_SDR50 (4 << 19) #define CORE_HC_SELECT_IN_HS400 (6 << 19) #define CORE_HC_SELECT_IN_MASK (7 << 19) @@ -1034,6 +1035,10 @@ static bool sdhci_msm_is_tuning_needed(struct sdhci_host *host) { struct mmc_ios *ios = &host->mmc->ios; + if (ios->timing == MMC_TIMING_UHS_SDR50 && + host->flags & SDHCI_SDR50_NEEDS_TUNING) + return true; + /* * Tuning is required for SDR104, HS200 and HS400 cards and * if clock frequency is greater than 100MHz in these modes. @@ -1102,6 +1107,8 @@ static int sdhci_msm_execute_tuning(struct mmc_host *mmc, u32 opcode) struct mmc_ios ios = host->mmc->ios; struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + const struct sdhci_msm_offset *msm_offset = msm_host->offset; + u32 config; if (!sdhci_msm_is_tuning_needed(host)) { msm_host->use_cdr = false; @@ -1118,6 +1125,14 @@ static int sdhci_msm_execute_tuning(struct mmc_host *mmc, u32 opcode) */ msm_host->tuning_done = 0; + if (ios.timing == MMC_TIMING_UHS_SDR50 && + host->flags & SDHCI_SDR50_NEEDS_TUNING) { + config = readl_relaxed(host->ioaddr + msm_offset->core_vendor_spec); + config &= ~CORE_HC_SELECT_IN_MASK; + config |= CORE_HC_SELECT_IN_EN | CORE_HC_SELECT_IN_SDR50; + writel_relaxed(config, host->ioaddr + msm_offset->core_vendor_spec); + } + /* * For HS400 tuning in HS200 timing requires: * - select MCLK/2 in VENDOR_SPEC