Hi,
-----Original Message----- From: Kongyang Liu seashell11234455@gmail.com Sent: Tuesday, April 16, 2024 4:31 PM To: u-boot@lists.denx.de Cc: Jaehoon Chung jh80.chung@samsung.com; Leo Yu-Chi Liang ycliang@andestech.com; Peng Fan peng.fan@nxp.com; Tom Rini trini@konsulko.com Subject: [PATCH] mmc: cv1800b: Add transmit tap delay config to fix write error
Currently, only the receive delay is configured while the transmit delay is not set, which may result in errors when writing to the file. This issue can be resolved by setting PHY_TX_SRC_INVERT to SDHCI_PHY_TX_RX_DLY.
Signed-off-by: Kongyang Liu seashell11234455@gmail.com
Reviewed-by: Jaehoon Chung jh80.chung@samsung.com
Best Regards, Jaehoon Chung
drivers/mmc/cv1800b_sdhci.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/cv1800b_sdhci.c b/drivers/mmc/cv1800b_sdhci.c index 2275c53777..a50f4cff0d 100644 --- a/drivers/mmc/cv1800b_sdhci.c +++ b/drivers/mmc/cv1800b_sdhci.c @@ -12,6 +12,8 @@ #define MMC_MAX_CLOCK 375000000 #define TUNE_MAX_PHCODE 128
+#define PHY_TX_SRC_INVERT BIT(8)
struct cv1800b_sdhci_plat { struct mmc_config cfg; struct mmc mmc; @@ -19,7 +21,7 @@ struct cv1800b_sdhci_plat {
static void cv1800b_set_tap_delay(struct sdhci_host *host, u16 tap) {
- sdhci_writel(host, tap << 16, SDHCI_PHY_TX_RX_DLY);
- sdhci_writel(host, PHY_TX_SRC_INVERT | tap << 16, SDHCI_PHY_TX_RX_DLY);
}
static void cv1800b_sdhci_reset(struct sdhci_host *host, u8 mask)
2.41.0