[PATCH] mmc: am654_sdhci: Clear UHS_MODE_SELECT when < MMC_HS_52

[Judith Mendez]

This clears UHS_MODE_SELECT for timing modes < MMC_HS_52.

When initializing to HS400 mode, the host controller downgrades to non-uhs
modes so clear UHS_MODE_SELECT at modes < MMC_HS_52.

This fixes eMMC writes on j7200 EVM.

Fixes: 6067aa66b3bb ("mmc: am654_sdhci: Add am654_sdhci_set_control_reg")
Signed-off-by: Judith Mendez <jm at ti.com>
---
 drivers/mmc/am654_sdhci.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/mmc/am654_sdhci.c b/drivers/mmc/am654_sdhci.c
index 0df3568f073..d3c8f94dd0c 100644
--- a/drivers/mmc/am654_sdhci.c
+++ b/drivers/mmc/am654_sdhci.c
@@ -527,11 +527,16 @@ static int am654_sdhci_execute_tuning(struct mmc *mmc, u8 opcode)
 void am654_sdhci_set_control_reg(struct sdhci_host *host)
 {
 	struct mmc *mmc = host->mmc;
+	u32 reg;
 
+	reg = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+	reg &= ~SDHCI_CTRL_UHS_MASK;
 	sdhci_set_voltage(host);
 
 	if (mmc->selected_mode > MMC_HS_52)
 		sdhci_set_uhs_timing(host);
+	else
+		sdhci_writew(host, reg, SDHCI_HOST_CONTROL2);
 }
 
 const struct sdhci_ops am654_sdhci_ops = {
-- 
2.49.0