arch/arm/mach-rockchip/rk3188/rk3188.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2019 Rockchip Electronics Co., Ltd
   4  */
   5 #include <common.h>
   6 #include <asm/io.h>
   7 #include <asm/arch-rockchip/grf_rk3188.h>
   8 #include <asm/arch-rockchip/hardware.h>
   9
  10 #ifdef CONFIG_DEBUG_UART_BOARD_INIT
  11 void board_debug_uart_init(void)
  12 {
  13         /* Enable early UART on the RK3188 */
  14 #define GRF_BASE        0x20008000
  15         struct rk3188_grf * const grf = (void *)GRF_BASE;
  16         enum {
  17                 GPIO1B1_SHIFT           = 2,
  18                 GPIO1B1_MASK            = 3,
  19                 GPIO1B1_GPIO            = 0,
  20                 GPIO1B1_UART2_SOUT,
  21                 GPIO1B1_JTAG_TDO,
  22
  23                 GPIO1B0_SHIFT           = 0,
  24                 GPIO1B0_MASK            = 3,
  25                 GPIO1B0_GPIO            = 0,
  26                 GPIO1B0_UART2_SIN,
  27                 GPIO1B0_JTAG_TDI,
  28         };
  29
  30         rk_clrsetreg(&grf->gpio1b_iomux,
  31                      GPIO1B1_MASK << GPIO1B1_SHIFT |
  32                      GPIO1B0_MASK << GPIO1B0_SHIFT,
  33                      GPIO1B1_UART2_SOUT << GPIO1B1_SHIFT |
  34                      GPIO1B0_UART2_SIN << GPIO1B0_SHIFT);
  35 }
  36 #endif