mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-13 06:42:56 +00:00
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/*
|
||
|
|
* GXP timer driver
|
||
|
|
*
|
||
|
|
* (C) Copyright 2022 Hewlett Packard Enterprise Development LP.
|
||
|
|
* Author: Nick Hawkins <nick.hawkins@hpe.com>
|
||
|
|
* Author: Jean-Marie Verdun <verdun@hpe.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <clk.h>
|
||
|
|
#include <dm.h>
|
||
|
|
#include <timer.h>
|
||
|
|
#include <asm/io.h>
|
||
|
|
|
||
|
|
#define USTIMELO 0x18
|
||
|
|
#define USTIMEHI 0x1C
|
||
|
|
|
||
|
|
struct gxp_timer_priv {
|
||
|
|
void __iomem *base;
|
||
|
|
};
|
||
|
|
|
||
|
|
static u64 gxp_timer_get_count(struct udevice *dev)
|
||
|
|
{
|
||
|
|
struct gxp_timer_priv *priv = dev_get_priv(dev);
|
||
|
|
u64 val;
|
||
|
|
|
||
|
|
val = readl(priv->base + USTIMEHI);
|
||
|
|
val = (val << 32) | readl(priv->base + USTIMELO);
|
||
|
|
|
||
|
|
return val;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int gxp_timer_probe(struct udevice *dev)
|
||
|
|
{
|
||
|
|
struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
||
|
|
struct gxp_timer_priv *priv = dev_get_priv(dev);
|
||
|
|
|
||
|
|
priv->base = dev_read_addr_ptr(dev);
|
||
|
|
if (!priv->base)
|
||
|
|
return -ENOENT;
|
||
|
|
|
||
|
|
uc_priv->clock_rate = 1000000;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct timer_ops gxp_timer_ops = {
|
||
|
|
.get_count = gxp_timer_get_count,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct udevice_id gxp_timer_ids[] = {
|
||
|
|
{ .compatible = "hpe,gxp-timer" },
|
||
|
|
{}
|
||
|
|
};
|
||
|
|
|
||
|
|
U_BOOT_DRIVER(gxp_timer) = {
|
||
|
|
.name = "gxp-timer",
|
||
|
|
.id = UCLASS_TIMER,
|
||
|
|
.of_match = gxp_timer_ids,
|
||
|
|
.priv_auto = sizeof(struct gxp_timer_priv),
|
||
|
|
.probe = gxp_timer_probe,
|
||
|
|
.ops = &gxp_timer_ops,
|
||
|
|
.flags = DM_FLAG_PRE_RELOC,
|
||
|
|
};
|