board.c 648 B

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2018 Stefan Roese <sr@denx.de>
  4. */
  5. #include <common.h>
  6. #include <init.h>
  7. #include <asm/io.h>
  8. #include <linux/bitops.h>
  9. #define MT76XX_GPIO1_MODE 0x10000060
  10. void board_debug_uart_init(void)
  11. {
  12. void __iomem *gpio_mode;
  13. /* Select UART2 mode instead of GPIO mode (default) */
  14. gpio_mode = ioremap_nocache(MT76XX_GPIO1_MODE, 0x100);
  15. clrbits_le32(gpio_mode, GENMASK(27, 26));
  16. }
  17. int board_early_init_f(void)
  18. {
  19. /*
  20. * The pin muxing of UART2 also needs to be done, if debug uart
  21. * is not enabled. So we need to call this function here as well.
  22. */
  23. board_debug_uart_init();
  24. return 0;
  25. }