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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
85 lines
1.5 KiB
C
85 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2012 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
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* (C) Copyright 2012 Renesas Solutions Corp.
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*/
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#include <common.h>
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#include <div64.h>
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#include <asm/io.h>
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#include <asm/arch-armv7/globaltimer.h>
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#include <asm/arch/rmobile.h>
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static struct globaltimer *global_timer = \
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(struct globaltimer *)GLOBAL_TIMER_BASE_ADDR;
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#define CLK2MHZ(clk) (clk / 1000 / 1000)
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static u64 get_cpu_global_timer(void)
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{
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u32 low, high;
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u64 timer;
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u32 old = readl(&global_timer->cnt_h);
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while (1) {
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low = readl(&global_timer->cnt_l);
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high = readl(&global_timer->cnt_h);
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if (old == high)
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break;
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else
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old = high;
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}
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timer = high;
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return (u64)((timer << 32) | low);
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}
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static u64 get_time_us(void)
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{
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u64 timer = get_cpu_global_timer();
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timer = ((timer << 2) + (CLK2MHZ(CONFIG_SYS_CPU_CLK) >> 1));
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do_div(timer, CLK2MHZ(CONFIG_SYS_CPU_CLK));
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return timer;
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}
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static ulong get_time_ms(void)
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{
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u64 us = get_time_us();
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do_div(us, 1000);
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return us;
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}
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int timer_init(void)
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{
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writel(0x01, &global_timer->ctl);
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return 0;
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}
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void __udelay(unsigned long usec)
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{
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u64 start, current;
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u64 wait;
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start = get_cpu_global_timer();
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wait = (u64)((usec * CLK2MHZ(CONFIG_SYS_CPU_CLK)) >> 2);
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do {
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current = get_cpu_global_timer();
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} while ((current - start) < wait);
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}
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ulong get_timer(ulong base)
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{
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return get_time_ms() - base;
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}
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unsigned long long get_ticks(void)
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{
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return get_cpu_global_timer();
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}
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ulong get_tbclk(void)
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{
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return (ulong)(CONFIG_SYS_CPU_CLK >> 2);
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}
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