// SPDX-License-Identifier: GPL-2.0+ /* * (C) Copyright 2019 Rockchip Electronics Co., Ltd */ #include #include #include #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