diff --git a/drivers/mmc/sdhci-cadence.c b/drivers/mmc/sdhci-cadence.c index e9108dabd1a..2d38c2270e5 100644 --- a/drivers/mmc/sdhci-cadence.c +++ b/drivers/mmc/sdhci-cadence.c @@ -171,6 +171,7 @@ static int sdhci_cdns_set_tune_val(struct sdhci_cdns_plat *plat, { void __iomem *reg = plat->hrs_addr + SDHCI_CDNS_HRS06; u32 tmp; + int i, ret; if (WARN_ON(!FIELD_FIT(SDHCI_CDNS_HRS06_TUNE, val))) return -EINVAL; @@ -178,11 +179,23 @@ static int sdhci_cdns_set_tune_val(struct sdhci_cdns_plat *plat, tmp = readl(reg); tmp &= ~SDHCI_CDNS_HRS06_TUNE; tmp |= FIELD_PREP(SDHCI_CDNS_HRS06_TUNE, val); - tmp |= SDHCI_CDNS_HRS06_TUNE_UP; - writel(tmp, reg); - return readl_poll_timeout(reg, tmp, !(tmp & SDHCI_CDNS_HRS06_TUNE_UP), - 1); + /* + * Workaround for IP errata: + * The IP6116 SD/eMMC PHY design has a timing issue on receive data + * path. Send tune request twice. + */ + for (i = 0; i < 2; i++) { + tmp |= SDHCI_CDNS_HRS06_TUNE_UP; + writel(tmp, reg); + + ret = readl_poll_timeout(reg, tmp, + !(tmp & SDHCI_CDNS_HRS06_TUNE_UP), 1); + if (ret) + return ret; + } + + return 0; } static int __maybe_unused sdhci_cdns_execute_tuning(struct udevice *dev,