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ARM: sunxi: Add support for uart0 on port F (mmc0)

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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>
This commit is contained in:
Chen-Yu Tsai 2014-10-22 16:47:42 +08:00 committed by Hans de Goede
parent 7f87ad354b
commit ff2b47f6a9
2 changed files with 12 additions and 1 deletions
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11
arch/arm/cpu/armv7/sunxi/board.c
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@ -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);

2
include/configs/sunxi-common.h
View File

@ -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))