diff options
Diffstat (limited to 'arch/arm/mach-rockchip/rk3036/rk3036.c')
| -rw-r--r-- | arch/arm/mach-rockchip/rk3036/rk3036.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/arm/mach-rockchip/rk3036/rk3036.c b/arch/arm/mach-rockchip/rk3036/rk3036.c new file mode 100644 index 0000000000..481af8a934 --- /dev/null +++ b/arch/arm/mach-rockchip/rk3036/rk3036.c @@ -0,0 +1,38 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2019 Rockchip Electronics Co., Ltd + */ +#include <asm/io.h> +#include <asm/arch-rockchip/grf_rk3036.h> +#include <asm/arch-rockchip/hardware.h> + +#ifdef CONFIG_DEBUG_UART_BOARD_INIT +void board_debug_uart_init(void) +{ +#define GRF_BASE 0x20008000 + struct rk3036_grf * const grf = (void *)GRF_BASE; + enum { + GPIO1C3_SHIFT = 6, + GPIO1C3_MASK = 3 << GPIO1C3_SHIFT, + GPIO1C3_GPIO = 0, + GPIO1C3_MMC0_D1, + GPIO1C3_UART2_SOUT, + + GPIO1C2_SHIFT = 4, + GPIO1C2_MASK = 3 << GPIO1C2_SHIFT, + GPIO1C2_GPIO = 0, + GPIO1C2_MMC0_D0, + GPIO1C2_UART2_SIN, + }; + /* + * NOTE: sd card and debug uart use same iomux in rk3036, + * so if you enable uart, + * you can not boot from sdcard + */ + rk_clrsetreg(&grf->gpio1c_iomux, + GPIO1C3_MASK << GPIO1C3_SHIFT | + GPIO1C2_MASK << GPIO1C2_SHIFT, + GPIO1C3_UART2_SOUT << GPIO1C3_SHIFT | + GPIO1C2_UART2_SIN << GPIO1C2_SHIFT); +} +#endif |