Some hosts are capable of running higher speed modes but do not have the board support for it. Introduce a quirk which prevents the stack from using modes running at 100MHz or faster.
Signed-off-by: Stefan Agner <[email protected]> --- drivers/mmc/host/sdhci.c | 8 ++++++++ drivers/mmc/host/sdhci.h | 2 ++ 2 files changed, 10 insertions(+) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 1c828e0e9905..8ac257dfaab3 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -3749,6 +3749,14 @@ int sdhci_setup_host(struct sdhci_host *host) } } + if (host->quirks2 & SDHCI_QUIRK2_NO_UHS_HS200_HS400) { + host->caps1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 | + SDHCI_SUPPORT_DDR50); + + mmc->caps2 &= ~(MMC_CAP2_HSX00_1_8V | MMC_CAP2_HSX00_1_2V | + MMC_CAP2_HS400_ES); + } + if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V) { host->caps1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 | SDHCI_SUPPORT_DDR50); diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 23966f887da6..cb2433d6d61f 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -450,6 +450,8 @@ struct sdhci_host { * obtainable timeout. */ #define SDHCI_QUIRK2_DISABLE_HW_TIMEOUT (1<<17) +/* Do not support any higher speeds (>50MHz) */ +#define SDHCI_QUIRK2_NO_UHS_HS200_HS400 (1<<18) int irq; /* Device IRQ */ void __iomem *ioaddr; /* Mapped address */ -- 2.18.0
