mirror of
https://github.com/AsahiLinux/u-boot
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39 lines
942 B
C
39 lines
942 B
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2019 Rockchip Electronics Co., Ltd
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*/
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#include <asm/io.h>
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#include <asm/arch-rockchip/grf_rk3036.h>
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#include <asm/arch-rockchip/hardware.h>
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#ifdef CONFIG_DEBUG_UART_BOARD_INIT
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void board_debug_uart_init(void)
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{
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#define GRF_BASE 0x20008000
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struct rk3036_grf * const grf = (void *)GRF_BASE;
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enum {
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GPIO1C3_SHIFT = 6,
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GPIO1C3_MASK = 3 << GPIO1C3_SHIFT,
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GPIO1C3_GPIO = 0,
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GPIO1C3_MMC0_D1,
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GPIO1C3_UART2_SOUT,
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GPIO1C2_SHIFT = 4,
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GPIO1C2_MASK = 3 << GPIO1C2_SHIFT,
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GPIO1C2_GPIO = 0,
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GPIO1C2_MMC0_D0,
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GPIO1C2_UART2_SIN,
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};
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/*
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* NOTE: sd card and debug uart use same iomux in rk3036,
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* so if you enable uart,
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* you can not boot from sdcard
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*/
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rk_clrsetreg(&grf->gpio1c_iomux,
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GPIO1C3_MASK << GPIO1C3_SHIFT |
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GPIO1C2_MASK << GPIO1C2_SHIFT,
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GPIO1C3_UART2_SOUT << GPIO1C3_SHIFT |
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GPIO1C2_UART2_SIN << GPIO1C2_SHIFT);
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}
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#endif
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