xref: /OK3568_Linux_fs/u-boot/arch/arm/mach-rockchip/rk3036/rk3036.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun  * Copyright (c) 2017 Rockchip Electronics Co., Ltd
3*4882a593Smuzhiyun  *
4*4882a593Smuzhiyun  * SPDX-License-Identifier:     GPL-2.0+
5*4882a593Smuzhiyun  */
6*4882a593Smuzhiyun #include <asm/io.h>
7*4882a593Smuzhiyun #include <asm/arch/bootrom.h>
8*4882a593Smuzhiyun #include <asm/arch/hardware.h>
9*4882a593Smuzhiyun #include <asm/arch/grf_rk3036.h>
10*4882a593Smuzhiyun #define GRF_BASE	0x20008000
11*4882a593Smuzhiyun 
12*4882a593Smuzhiyun #ifdef CONFIG_SPL_BUILD
arch_cpu_init(void)13*4882a593Smuzhiyun int arch_cpu_init(void)
14*4882a593Smuzhiyun {
15*4882a593Smuzhiyun 	return 0;
16*4882a593Smuzhiyun }
17*4882a593Smuzhiyun #endif
board_debug_uart_init(void)18*4882a593Smuzhiyun void board_debug_uart_init(void)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun 	struct rk3036_grf * const grf = (void *)GRF_BASE;
21*4882a593Smuzhiyun 	/*
22*4882a593Smuzhiyun 	 * NOTE: sd card and debug uart use same iomux in rk3036,
23*4882a593Smuzhiyun 	 * so if you enable uart,
24*4882a593Smuzhiyun 	 * you can not boot from sdcard
25*4882a593Smuzhiyun 	 */
26*4882a593Smuzhiyun 	rk_clrsetreg(&grf->gpio1c_iomux,
27*4882a593Smuzhiyun 		     GPIO1C3_MASK << GPIO1C3_SHIFT |
28*4882a593Smuzhiyun 		     GPIO1C2_MASK << GPIO1C2_SHIFT,
29*4882a593Smuzhiyun 		     GPIO1C3_UART2_SOUT << GPIO1C3_SHIFT |
30*4882a593Smuzhiyun 		     GPIO1C2_UART2_SIN << GPIO1C2_SHIFT);
31*4882a593Smuzhiyun 
32*4882a593Smuzhiyun }
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