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// 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
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