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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * (C) Copyright 2015 Rockchip Electronics Co., Ltd
- */
- #include <common.h>
- #include <asm/arch-rockchip/timer.h>
- #include <asm/io.h>
- #include <linux/types.h>
- struct rk_timer * const timer_ptr = (void *)CONFIG_SYS_TIMER_BASE;
- static uint64_t rockchip_get_ticks(void)
- {
- uint64_t timebase_h, timebase_l;
- timebase_l = readl(&timer_ptr->timer_curr_value0);
- timebase_h = readl(&timer_ptr->timer_curr_value1);
- return timebase_h << 32 | timebase_l;
- }
- static uint64_t usec_to_tick(unsigned int usec)
- {
- uint64_t tick = usec;
- tick *= CONFIG_SYS_TIMER_RATE / (1000 * 1000);
- return tick;
- }
- void rockchip_udelay(unsigned int usec)
- {
- uint64_t tmp;
- /* get timestamp */
- tmp = rockchip_get_ticks() + usec_to_tick(usec);
- /* loop till event */
- while (rockchip_get_ticks() < tmp+1)
- ;
- }
- void rockchip_timer_init(void)
- {
- writel(0xffffffff, &timer_ptr->timer_load_count0);
- writel(0xffffffff, &timer_ptr->timer_load_count1);
- writel(1, &timer_ptr->timer_ctrl_reg);
- }
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