1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2019 Rockchip Electronics Co., Ltd
6 #include <asm/arch-rockchip/grf_rk3036.h>
7 #include <asm/arch-rockchip/hardware.h>
9 #ifdef CONFIG_DEBUG_UART_BOARD_INIT
10 void board_debug_uart_init(void)
12 #define GRF_BASE 0x20008000
13 struct rk3036_grf * const grf = (void *)GRF_BASE;
16 GPIO1C3_MASK = 3 << GPIO1C3_SHIFT,
22 GPIO1C2_MASK = 3 << GPIO1C2_SHIFT,
28 * NOTE: sd card and debug uart use same iomux in rk3036,
29 * so if you enable uart,
30 * you can not boot from sdcard
32 rk_clrsetreg(&grf->gpio1c_iomux,
33 GPIO1C3_MASK << GPIO1C3_SHIFT |
34 GPIO1C2_MASK << GPIO1C2_SHIFT,
35 GPIO1C3_UART2_SOUT << GPIO1C3_SHIFT |
36 GPIO1C2_UART2_SIN << GPIO1C2_SHIFT);