diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c index 797be7549a15c01a0e9acda2b0adaccb0a6c9416..653f335bef1516ca9aba102e1f3ab21d99a754ce 100644 --- a/drivers/mmc/host/sdhci-of-esdhc.c +++ b/drivers/mmc/host/sdhci-of-esdhc.c @@ -208,6 +208,12 @@ static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock) if (clock == 0) return; + /* Workaround to start pre_div at 2 for VNN < VENDOR_V_23 */ + temp = esdhc_readw(host, SDHCI_HOST_VERSION); + temp = (temp & SDHCI_VENDOR_VER_MASK) >> SDHCI_VENDOR_VER_SHIFT; + if (temp < VENDOR_V_23) + pre_div = 2; + /* Workaround to reduce the clock frequency for p1010 esdhc */ if (of_find_compatible_node(NULL, NULL, "fsl,p1010-esdhc")) { if (clock > 20000000)