MLK-17048 imx8mq_evk: Fix SD CD pad issue in SPL

The EVK board does not use external pull up resistor for SD CD pin, it requires
the pad to be configured as pull up, otherwise the signal level is always low even
the card is not inserted.

This patch configures the pad of CD and RESET to pull up to align with kernel,
although there is already a external pull up for RESET.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>

diff --git a/board/freescale/imx8mq_evk/spl.c b/board/freescale/imx8mq_evk/spl.c
index 6e88378..fe2b88d 100644 (file)
--- a/board/freescale/imx8mq_evk/spl.c
+++ b/board/freescale/imx8mq_evk/spl.c
@@ -69,6 +69,7 @@ int board_mmc_getcd(struct mmc *mmc)
 
 #define USDHC_PAD_CTRL (PAD_CTL_DSE6 | PAD_CTL_HYS | PAD_CTL_PUE | \
                         PAD_CTL_FSEL2)
+#define USDHC_GPIO_PAD_CTRL (PAD_CTL_PUE | PAD_CTL_DSE1)
 
 static iomux_v3_cfg_t const usdhc1_pads[] = {
        IMX8MQ_PAD_SD1_CLK__USDHC1_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
@@ -91,8 +92,8 @@ static iomux_v3_cfg_t const usdhc2_pads[] = {
        IMX8MQ_PAD_SD2_DATA1__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
        IMX8MQ_PAD_SD2_DATA2__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0x16 */
        IMX8MQ_PAD_SD2_DATA3__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
-       IMX8MQ_PAD_SD2_CD_B__GPIO2_IO12 | MUX_PAD_CTRL(NO_PAD_CTRL),
-       IMX8MQ_PAD_SD2_RESET_B__GPIO2_IO19 | MUX_PAD_CTRL(NO_PAD_CTRL),
+       IMX8MQ_PAD_SD2_CD_B__GPIO2_IO12 | MUX_PAD_CTRL(USDHC_GPIO_PAD_CTRL),
+       IMX8MQ_PAD_SD2_RESET_B__GPIO2_IO19 | MUX_PAD_CTRL(USDHC_GPIO_PAD_CTRL),
 };
 
 static struct fsl_esdhc_cfg usdhc_cfg[2] = {