da850/omap-l138: modifications for Logic PD Rev.3 AM18xx EVM

AHCLKR/UART1_RTS/GP0[11] pin needs to be configured for
MMC and NOR to work on DA850/OMAP-L138 Rev.3 EVM. When
GP0[11] is low, the SD0 interface will not work, but NOR
flash will. When GP0[11] is high, SD0 will work but NOR
flash will not.

Tested-by: Christian Riesch <christian.riesch@omicron.at>
Signed-off-by: Rajashekhara, Sudhakar <sudhakar.raj@ti.com>
Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Hadli, Manjunath <manjunath.hadli@ti.com>

board/davinci/da8xxevm/da850evm.c

@@ -335,7 +335,7 @@ int board_early_init_f(void)
 
 int board_init(void)
 {
-#ifdef CONFIG_USE_NOR
+#if defined(CONFIG_USE_NOR) || defined(CONFIG_DAVINCI_MMC)
 	u32 val;
 #endif
 
@@ -386,6 +386,16 @@ int board_init(void)
 	writel(val, GPIO_BANK0_REG_CLR_ADDR);
 #endif
 
+#ifdef CONFIG_DAVINCI_MMC
+	/* Set the GPIO direction as output */
+	clrbits_le32((u32 *)GPIO_BANK0_REG_DIR_ADDR, (0x01 << 11));
+
+	/* Set the output as high */
+	val = readl(GPIO_BANK0_REG_SET_ADDR);
+	val |= (0x01 << 11);
+	writel(val, GPIO_BANK0_REG_SET_ADDR);
+#endif
+
 #ifdef CONFIG_DRIVER_TI_EMAC
 	davinci_emac_mii_mode_sel(HAS_RMII);
 #endif /* CONFIG_DRIVER_TI_EMAC */