mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-10 05:06:16 +09:00
cb91173a7f
We are about to reuse the rockchip timer (header file) for 64bit ARMv8 chips, so it seems a good time to make the register sizes explicit by changing from 'unsigned int' to 'u32'. Reorders the header-includes in rk_timer.c to ensure that 'u32' is definded before it is used by 'asm/arch/timer.h'. Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
49 lines
1006 B
C
49 lines
1006 B
C
/*
|
|
* (C) Copyright 2015 Rockchip Electronics Co., Ltd
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/arch/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);
|
|
}
|