debug-uart-ld6b.c 687 B

123456789101112131415161718192021222324252627282930
  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
  4. */
  5. #include <config.h>
  6. #include <linux/kernel.h>
  7. #include <linux/io.h>
  8. #include "../sc-regs.h"
  9. #include "../sg-regs.h"
  10. #include "debug-uart.h"
  11. #define UNIPHIER_LD6B_UART_CLK 88888888
  12. unsigned int uniphier_ld6b_debug_uart_init(void)
  13. {
  14. u32 tmp;
  15. sg_set_iectrl(0);
  16. sg_set_pinsel(135, 3, 8, 4); /* PORT10 -> TXD0 */
  17. sg_set_pinsel(115, 0, 8, 4); /* TXD1 -> TXD1 */
  18. sg_set_pinsel(113, 2, 8, 4); /* SBO0 -> TXD2 */
  19. tmp = readl(SC_CLKCTRL);
  20. tmp |= SC_CLKCTRL_CEN_PERI;
  21. writel(tmp, SC_CLKCTRL);
  22. return DIV_ROUND_CLOSEST(UNIPHIER_LD6B_UART_CLK, 16 * CONFIG_BAUDRATE);
  23. }