imx: mx6quq7: add sd card detection

Add board_mmc_getcd function and declare CD_GPIO for SDCard.

Signed-off-by: Julien Corjon <corjon.j@ecagroup.com>

board/seco/mx6quq7/mx6quq7.c

@@ -91,11 +91,30 @@ int board_eth_init(bd_t *bis)
 	return ret;
 }
 
+#define USDHC4_CD_GPIO		IMX_GPIO_NR(2, 6)
+
 static struct fsl_esdhc_cfg usdhc_cfg[2] = {
 	{USDHC3_BASE_ADDR, 0, 4},
 	{USDHC4_BASE_ADDR, 0, 4},
 };
 
+int board_mmc_getcd(struct mmc *mmc)
+{
+	struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+	int ret = 0;
+
+	switch (cfg->esdhc_base) {
+	case USDHC3_BASE_ADDR:
+		ret = 1; /* Assume eMMC is always present */
+		break;
+	case USDHC4_BASE_ADDR:
+		ret = !gpio_get_value(USDHC4_CD_GPIO);
+		break;
+	}
+
+	return ret;
+}
+
 int board_mmc_init(bd_t *bis)
 {
 	u32 index = 0;