diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/zynq_sdhci.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/mmc/zynq_sdhci.c b/drivers/mmc/zynq_sdhci.c index 9a16939..4a877b4 100644 --- a/drivers/mmc/zynq_sdhci.c +++ b/drivers/mmc/zynq_sdhci.c @@ -776,6 +776,25 @@ static int arasan_sdhci_probe(struct udevice *dev) return ret; upriv->mmc = host->mmc; + /* + * WORKAROUND: Versal platforms have an issue with card detect state. + * Due to this, host controller is switching off voltage to sd card + * causing sd card timeout error. Workaround this by adding a wait for + * 1000msec till the card detect state gets stable. + */ + if (IS_ENABLED(CONFIG_ARCH_VERSAL)) { + u32 timeout = 1000; + + while (((sdhci_readl(host, SDHCI_PRESENT_STATE) & + SDHCI_CARD_STATE_STABLE) == 0) && timeout--) { + mdelay(1); + } + if (!timeout) { + dev_err(dev, "Sdhci card detect state not stable\n"); + return -ETIMEDOUT; + } + } + return sdhci_probe(dev); } |