time.c 793 B

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * (C) Copyright 2009
  4. * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
  5. *
  6. * (C) Copyright 2007-2012
  7. * Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
  8. *
  9. * (C) Copyright 2003
  10. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  11. */
  12. #include <common.h>
  13. #include <init.h>
  14. #include <asm/processor.h>
  15. #include <asm/io.h>
  16. #include <linux/bitops.h>
  17. #if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARCH_RMOBILE)
  18. #define TSTR 0x4
  19. #define TCR0 0x10
  20. #endif /* CONFIG_CPU_SH4 */
  21. #define TCR_TPSC 0x07
  22. #define TSTR_STR0 BIT(0)
  23. int timer_init(void)
  24. {
  25. writew(readw(TMU_BASE + TCR0) & ~TCR_TPSC, TMU_BASE + TCR0);
  26. writeb(readb(TMU_BASE + TSTR) & ~TSTR_STR0, TMU_BASE + TSTR);
  27. writeb(readb(TMU_BASE + TSTR) | TSTR_STR0, TMU_BASE + TSTR);
  28. return 0;
  29. }