mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-07 05:34:28 +00:00
bc8d12bfd8
Added support for timer_early_get_count() and timer_early_get_rate() This is mostly useful in tracing. Signed-off-by: Pragnesh Patel <pragnesh.patel@sifive.com> Reviewed-by: Rick Chen <rick@andestech.com>
67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2020, Sean Anderson <seanga2@gmail.com>
|
|
* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <clk.h>
|
|
#include <dm.h>
|
|
#include <timer.h>
|
|
#include <asm/io.h>
|
|
#include <dm/device-internal.h>
|
|
#include <linux/err.h>
|
|
|
|
/* mtime register */
|
|
#define MTIME_REG(base) ((ulong)(base) + 0xbff8)
|
|
|
|
static u64 notrace sifive_clint_get_count(struct udevice *dev)
|
|
{
|
|
return readq((void __iomem *)MTIME_REG(dev_get_priv(dev)));
|
|
}
|
|
|
|
#if CONFIG_IS_ENABLED(RISCV_MMODE) && IS_ENABLED(CONFIG_TIMER_EARLY)
|
|
/**
|
|
* timer_early_get_rate() - Get the timer rate before driver model
|
|
*/
|
|
unsigned long notrace timer_early_get_rate(void)
|
|
{
|
|
return RISCV_MMODE_TIMER_FREQ;
|
|
}
|
|
|
|
/**
|
|
* timer_early_get_count() - Get the timer count before driver model
|
|
*
|
|
*/
|
|
u64 notrace timer_early_get_count(void)
|
|
{
|
|
return readq((void __iomem *)MTIME_REG(RISCV_MMODE_TIMERBASE));
|
|
}
|
|
#endif
|
|
|
|
static const struct timer_ops sifive_clint_ops = {
|
|
.get_count = sifive_clint_get_count,
|
|
};
|
|
|
|
static int sifive_clint_probe(struct udevice *dev)
|
|
{
|
|
dev_set_priv(dev, dev_read_addr_ptr(dev));
|
|
if (!dev_get_priv(dev))
|
|
return -EINVAL;
|
|
|
|
return timer_timebase_fallback(dev);
|
|
}
|
|
|
|
static const struct udevice_id sifive_clint_ids[] = {
|
|
{ .compatible = "riscv,clint0" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(sifive_clint) = {
|
|
.name = "sifive_clint",
|
|
.id = UCLASS_TIMER,
|
|
.of_match = sifive_clint_ids,
|
|
.probe = sifive_clint_probe,
|
|
.ops = &sifive_clint_ops,
|
|
.flags = DM_FLAG_PRE_RELOC,
|
|
};
|