| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * (C) Copyright 2019 Rockchip Electronics Co., Ltd |
| */ |
| #include <common.h> |
| #include <asm/io.h> |
| #include <asm/arch-rockchip/grf_rk3188.h> |
| #include <asm/arch-rockchip/hardware.h> |
| |
| #ifdef CONFIG_DEBUG_UART_BOARD_INIT |
| void board_debug_uart_init(void) |
| { |
| /* Enable early UART on the RK3188 */ |
| #define GRF_BASE 0x20008000 |
| struct rk3188_grf * const grf = (void *)GRF_BASE; |
| enum { |
| GPIO1B1_SHIFT = 2, |
| GPIO1B1_MASK = 3, |
| GPIO1B1_GPIO = 0, |
| GPIO1B1_UART2_SOUT, |
| GPIO1B1_JTAG_TDO, |
| |
| GPIO1B0_SHIFT = 0, |
| GPIO1B0_MASK = 3, |
| GPIO1B0_GPIO = 0, |
| GPIO1B0_UART2_SIN, |
| GPIO1B0_JTAG_TDI, |
| }; |
| |
| rk_clrsetreg(&grf->gpio1b_iomux, |
| GPIO1B1_MASK << GPIO1B1_SHIFT | |
| GPIO1B0_MASK << GPIO1B0_SHIFT, |
| GPIO1B1_UART2_SOUT << GPIO1B1_SHIFT | |
| GPIO1B0_UART2_SIN << GPIO1B0_SHIFT); |
| } |
| #endif |