[PATCH V4 4/8] drivers: mmc: am654_sdhci: Update OTAP/ITAP delay

[Nishanth Menon]

From: Nitin Yadav <n-yadav at ti.com>

U-Boot is fail to boot class U1 UHS SD cards (such as microcenter)
due to incorrect OTAP and ITAP delay select values. Update OTAP and
ITAP delay select values based on recommeded RIOT values to fix boot
issue.

Signed-off-by: Nitin Yadav <n-yadav at ti.com>
Signed-off-by: Nishanth Menon <nm at ti.com>
---
Picked up from TI u-boot
New patch in the series

 drivers/mmc/am654_sdhci.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/am654_sdhci.c b/drivers/mmc/am654_sdhci.c
index fd667aeafdaa..d0b51c0707d4 100644
--- a/drivers/mmc/am654_sdhci.c
+++ b/drivers/mmc/am654_sdhci.c
@@ -442,12 +442,18 @@ static int j721e_4bit_sdhci_set_ios_post(struct sdhci_host *host)
 {
 	struct udevice *dev = host->mmc->dev;
 	struct am654_sdhci_plat *plat = dev_get_plat(dev);
-	u32 otap_del_sel, mask, val;
+	u32 otap_del_sel, itap_del_sel, mask, val;
 
 	otap_del_sel = plat->otap_del_sel[host->mmc->selected_mode];
-	mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK;
-	val = (1 << OTAPDLYENA_SHIFT) | (otap_del_sel << OTAPDLYSEL_SHIFT);
+	itap_del_sel = plat->itap_del_sel[host->mmc->selected_mode];
+	mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK | ITAPDLYSEL_MASK |
+		ITAPDLYENA_MASK;
+	val = (1 << OTAPDLYENA_SHIFT) | (otap_del_sel << OTAPDLYSEL_SHIFT) |
+		(1 << ITAPDLYENA_SHIFT) | (itap_del_sel << ITAPDLYSEL_SHIFT);
+	regmap_update_bits(plat->base, PHY_CTRL4, ITAPCHGWIN_MASK,
+			   1 << ITAPCHGWIN_SHIFT);
 	regmap_update_bits(plat->base, PHY_CTRL4, mask, val);
+	regmap_update_bits(plat->base, PHY_CTRL4, ITAPCHGWIN_MASK, 0);
 
 	regmap_update_bits(plat->base, PHY_CTRL5, CLKBUFSEL_MASK,
 			   plat->clkbuf_sel);
@@ -501,7 +507,7 @@ static int sdhci_am654_get_otap_delay(struct udevice *dev,
 	 * Remove the corresponding capability if an otap-del-sel
 	 * value is not found
 	 */
-	for (i = MMC_HS; i <= MMC_HS_400; i++) {
+	for (i = MMC_LEGACY; i <= MMC_HS_400; i++) {
 		ret = dev_read_u32(dev, td[i].otap_binding,
 				   &plat->otap_del_sel[i]);
 		if (ret) {
-- 
2.40.0