From ff2b47f6a9cc10251cc601d34241ee02933c2187 Mon Sep 17 00:00:00 2001
From: Chen-Yu Tsai <wens@csie.org>
Date: Wed, 22 Oct 2014 16:47:42 +0800
Subject: [PATCH] ARM: sunxi: Add support for uart0 on port F (mmc0)
Allwinner SoCs provide uart0 muxed with mmc0, which can then be used
with a micro SD breakout board. On the A23, this is the only way to
use uart0.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
---
arch/arm/cpu/armv7/sunxi/board.c | 11 ++++++++++-
include/configs/sunxi-common.h | 2 ++
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/arch/arm/cpu/armv7/sunxi/board.c b/arch/arm/cpu/armv7/sunxi/board.c
index 436df8cf2e..7d10f10fd8 100644
--- a/arch/arm/cpu/armv7/sunxi/board.c
+++ b/arch/arm/cpu/armv7/sunxi/board.c
@@ -50,7 +50,16 @@ u32 spl_boot_mode(void)
int gpio_init(void)
{
-#if CONFIG_CONS_INDEX == 1 && (defined(CONFIG_SUN4I) || defined(CONFIG_SUN7I))
+#if CONFIG_CONS_INDEX == 1 && defined(CONFIG_UART0_PORT_F)
+#if defined(CONFIG_SUN4I) || defined(CONFIG_SUN7I)
+ /* disable GPB22,23 as uart0 tx,rx to avoid conflict */
+ sunxi_gpio_set_cfgpin(SUNXI_GPB(22), SUNXI_GPIO_INPUT);
+ sunxi_gpio_set_cfgpin(SUNXI_GPB(23), SUNXI_GPIO_INPUT);
+#endif
+ sunxi_gpio_set_cfgpin(SUNXI_GPF(2), SUNXI_GPF2_UART0_TX);
+ sunxi_gpio_set_cfgpin(SUNXI_GPF(4), SUNXI_GPF4_UART0_RX);
+ sunxi_gpio_set_pull(SUNXI_GPF(4), 1);
+#elif CONFIG_CONS_INDEX == 1 && (defined(CONFIG_SUN4I) || defined(CONFIG_SUN7I))
sunxi_gpio_set_cfgpin(SUNXI_GPB(22), SUN4I_GPB22_UART0_TX);
sunxi_gpio_set_cfgpin(SUNXI_GPB(23), SUN4I_GPB23_UART0_RX);
sunxi_gpio_set_pull(SUNXI_GPB(23), SUNXI_GPIO_PULL_UP);
diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h
index d55e4cab06..dfcb9a8e5e 100644
--- a/include/configs/sunxi-common.h
+++ b/include/configs/sunxi-common.h
@@ -77,6 +77,7 @@
#define CONFIG_INITRD_TAG
/* mmc config */
+#if !defined(CONFIG_UART0_PORT_F)
#define CONFIG_MMC
#define CONFIG_GENERIC_MMC
#define CONFIG_CMD_MMC
@@ -84,6 +85,7 @@
#define CONFIG_MMC_SUNXI_SLOT 0
#define CONFIG_ENV_IS_IN_MMC
#define CONFIG_SYS_MMC_ENV_DEV 0 /* first detected MMC controller */
+#endif
/* 4MB of malloc() pool */
#define CONFIG_SYS_MALLOC_LEN (CONFIG_ENV_SIZE + (4 << 20))
--
2.39.5