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drivers: mmc: am654_sdhci: Update OTAP/ITAP delay 

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@ti.com>
This commit is contained in:
Nitin Yadav 2023-05-30 16:15:09 +05:30 committed by Udit Kumar
parent 3e17c0c810
commit 6bcbee9935
1 changed files with 10 additions and 4 deletions
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14
drivers/mmc/am654_sdhci.c
View File

@ -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) {