mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-26 04:49:42 +09:00
48 lines
1018 B
C
48 lines
1018 B
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 <linux/err.h>
|
||
|
|
|
||
|
|
/* mtime register */
|
||
|
|
#define MTIME_REG(base) ((ulong)(base) + 0xbff8)
|
||
|
|
|
||
|
|
static u64 sifive_clint_get_count(struct udevice *dev)
|
||
|
|
{
|
||
|
|
return readq((void __iomem *)MTIME_REG(dev->priv));
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct timer_ops sifive_clint_ops = {
|
||
|
|
.get_count = sifive_clint_get_count,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int sifive_clint_probe(struct udevice *dev)
|
||
|
|
{
|
||
|
|
dev->priv = dev_read_addr_ptr(dev);
|
||
|
|
if (!dev->priv)
|
||
|
|
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,
|
||
|
|
};
|