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// 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,
};
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