From c757a50bd12b4f4f1c44a7cc42354918e8d60cd7 Mon Sep 17 00:00:00 2001 From: Chen-Yu Tsai Date: Wed, 22 Oct 2014 16:47:47 +0800 Subject: [PATCH] ARM: sunxi: Add support for using R_UART as console The A23 only has UART0 muxed with MMC0. Some of the boards we encountered expose R_UART as a set of pads. Add support for R_UART so we can have a console while using mmc. Signed-off-by: Chen-Yu Tsai Acked-by: Ian Campbell --- arch/arm/cpu/armv7/sunxi/board.c | 4 ++++ arch/arm/cpu/armv7/sunxi/clock_sun6i.c | 6 ++++++ arch/arm/include/asm/arch-sunxi/cpu.h | 1 + arch/arm/include/asm/arch-sunxi/gpio.h | 3 +++ include/configs/sunxi-common.h | 1 + 5 files changed, 15 insertions(+) diff --git a/arch/arm/cpu/armv7/sunxi/board.c b/arch/arm/cpu/armv7/sunxi/board.c index 134a19874e..06eb6768e8 100644 --- a/arch/arm/cpu/armv7/sunxi/board.c +++ b/arch/arm/cpu/armv7/sunxi/board.c @@ -75,6 +75,10 @@ int gpio_init(void) sunxi_gpio_set_cfgpin(SUNXI_GPG(3), SUN5I_GPG3_UART1_TX); sunxi_gpio_set_cfgpin(SUNXI_GPG(4), SUN5I_GPG4_UART1_RX); sunxi_gpio_set_pull(SUNXI_GPG(4), SUNXI_GPIO_PULL_UP); +#elif CONFIG_CONS_INDEX == 5 && defined(CONFIG_SUN8I) + sunxi_gpio_set_cfgpin(SUNXI_GPL(2), SUN8I_GPL2_R_UART_TX); + sunxi_gpio_set_cfgpin(SUNXI_GPL(3), SUN8I_GPL3_R_UART_RX); + sunxi_gpio_set_pull(SUNXI_GPL(3), SUNXI_GPIO_PULL_UP); #else #error Unsupported console port number. Please fix pin mux settings in board.c #endif diff --git a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c index 8387b931aa..1eae9767d0 100644 --- a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c +++ b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c @@ -13,6 +13,7 @@ #include #include #include +#include #include void clock_init_uart(void) @@ -20,6 +21,7 @@ void clock_init_uart(void) struct sunxi_ccm_reg *const ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; +#if CONFIG_CONS_INDEX < 5 /* uart clock source is apb2 */ writel(APB2_CLK_SRC_OSC24M| APB2_CLK_RATE_N_1| @@ -35,6 +37,10 @@ void clock_init_uart(void) setbits_le32(&ccm->apb2_reset_cfg, 1 << (APB2_RESET_UART_SHIFT + CONFIG_CONS_INDEX - 1)); +#else + /* enable R_PIO and R_UART clocks, and de-assert resets */ + prcm_apb0_enable(PRCM_APB0_GATE_PIO | PRCM_APB0_GATE_UART); +#endif /* Dup with clock_init_safe(), drop once sun6i SPL support lands */ writel(PLL6_CFG_DEFAULT, &ccm->pll6_cfg); diff --git a/arch/arm/include/asm/arch-sunxi/cpu.h b/arch/arm/include/asm/arch-sunxi/cpu.h index 313e6c849d..0de79a0d50 100644 --- a/arch/arm/include/asm/arch-sunxi/cpu.h +++ b/arch/arm/include/asm/arch-sunxi/cpu.h @@ -111,6 +111,7 @@ #define SUNXI_AVG_BASE 0x01ea0000 #define SUNXI_PRCM_BASE 0x01f01400 +#define SUNXI_R_UART_BASE 0x01f02800 #define SUNXI_R_PIO_BASE 0x01f02c00 #define SUNXI_P2WI_BASE 0x01f03400 diff --git a/arch/arm/include/asm/arch-sunxi/gpio.h b/arch/arm/include/asm/arch-sunxi/gpio.h index de7a86aaa8..7bb649950a 100644 --- a/arch/arm/include/asm/arch-sunxi/gpio.h +++ b/arch/arm/include/asm/arch-sunxi/gpio.h @@ -172,6 +172,9 @@ enum sunxi_gpio_number { #define SUN4I_GPI4_SDC3 2 +#define SUN8I_GPL2_R_UART_TX 2 +#define SUN8I_GPL3_R_UART_RX 2 + /* GPIO pin pull-up/down config */ #define SUNXI_GPIO_PULL_DISABLE 0 #define SUNXI_GPIO_PULL_UP 1 diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h index dfcb9a8e5e..2b0241b7fe 100644 --- a/include/configs/sunxi-common.h +++ b/include/configs/sunxi-common.h @@ -42,6 +42,7 @@ #define CONFIG_SYS_NS16550_COM2 SUNXI_UART1_BASE #define CONFIG_SYS_NS16550_COM3 SUNXI_UART2_BASE #define CONFIG_SYS_NS16550_COM4 SUNXI_UART3_BASE +#define CONFIG_SYS_NS16550_COM5 SUNXI_R_UART_BASE /* DRAM Base */ #define CONFIG_SYS_SDRAM_BASE 0x40000000 -- 2.25.1