65cc0e2a65
The rest of the unmigrated CONFIG symbols in the CONFIG_SYS namespace do not easily transition to Kconfig. In many cases they likely should come from the device tree instead. Move these out of CONFIG namespace and in to CFG namespace. Signed-off-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org>
88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2017, STMicroelectronics - All Rights Reserved
|
|
* Author(s): Patrice Chotard, <patrice.chotard@foss.st.com> for STMicroelectronics.
|
|
*
|
|
* ARM Cortext A9 global timer driver
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <clk.h>
|
|
#include <timer.h>
|
|
#include <linux/err.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/arch-armv7/globaltimer.h>
|
|
|
|
struct arm_global_timer_priv {
|
|
struct globaltimer *global_timer;
|
|
};
|
|
|
|
static u64 arm_global_timer_get_count(struct udevice *dev)
|
|
{
|
|
struct arm_global_timer_priv *priv = dev_get_priv(dev);
|
|
struct globaltimer *global_timer = priv->global_timer;
|
|
u32 low, high;
|
|
u64 timer;
|
|
u32 old = readl(&global_timer->cnt_h);
|
|
|
|
while (1) {
|
|
low = readl(&global_timer->cnt_l);
|
|
high = readl(&global_timer->cnt_h);
|
|
if (old == high)
|
|
break;
|
|
else
|
|
old = high;
|
|
}
|
|
timer = high;
|
|
return (u64)((timer << 32) | low);
|
|
}
|
|
|
|
static int arm_global_timer_probe(struct udevice *dev)
|
|
{
|
|
struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
|
struct arm_global_timer_priv *priv = dev_get_priv(dev);
|
|
struct clk clk;
|
|
int err;
|
|
ulong ret;
|
|
|
|
/* get arm global timer base address */
|
|
priv->global_timer = (struct globaltimer *)dev_read_addr_ptr(dev);
|
|
if (!priv->global_timer)
|
|
return -ENOENT;
|
|
|
|
err = clk_get_by_index(dev, 0, &clk);
|
|
if (!err) {
|
|
ret = clk_get_rate(&clk);
|
|
if (IS_ERR_VALUE(ret))
|
|
return ret;
|
|
uc_priv->clock_rate = ret;
|
|
} else {
|
|
uc_priv->clock_rate = CFG_SYS_HZ_CLOCK;
|
|
}
|
|
|
|
/* init timer */
|
|
writel(0x01, &priv->global_timer->ctl);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct timer_ops arm_global_timer_ops = {
|
|
.get_count = arm_global_timer_get_count,
|
|
};
|
|
|
|
static const struct udevice_id arm_global_timer_ids[] = {
|
|
{ .compatible = "arm,cortex-a9-global-timer" },
|
|
{}
|
|
};
|
|
|
|
U_BOOT_DRIVER(arm_global_timer) = {
|
|
.name = "arm_global_timer",
|
|
.id = UCLASS_TIMER,
|
|
.of_match = arm_global_timer_ids,
|
|
.priv_auto = sizeof(struct arm_global_timer_priv),
|
|
.probe = arm_global_timer_probe,
|
|
.ops = &arm_global_timer_ops,
|
|
};
|