| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * (C) Copyright 2009 |
| * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
| * |
| * (C) Copyright 2007-2012 |
| * Nobobuhiro Iwamatsu <iwamatsu@nigauri.org> |
| * |
| * (C) Copyright 2003 |
| * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| */ |
| |
| #include <common.h> |
| #include <asm/processor.h> |
| #include <asm/io.h> |
| #include <sh_tmu.h> |
| |
| #define TCR_TPSC 0x07 |
| #define TSTR_STR0 BIT(0) |
| |
| static struct tmu_regs *tmu = (struct tmu_regs *)TMU_BASE; |
| |
| unsigned long get_tbclk(void) |
| { |
| return CONFIG_SH_TMU_CLK_FREQ / 4; |
| } |
| |
| unsigned long timer_read_counter(void) |
| { |
| return ~readl(&tmu->tcnt0); |
| } |
| |
| int timer_init(void) |
| { |
| writew(readw(&tmu->tcr0) & ~TCR_TPSC, &tmu->tcr0); |
| writeb(readb(&tmu->tstr) & ~TSTR_STR0, &tmu->tstr); |
| writeb(readb(&tmu->tstr) | TSTR_STR0, &tmu->tstr); |
| |
| return 0; |
| } |
| |