mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 17:58:23 +00:00
d1998a9fde
This name is far too long. Rename it to remove the 'data' bits. This makes it consistent with the platdata->plat rename. Signed-off-by: Simon Glass <sjg@chromium.org>
87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2017 Microchip Corporation
|
|
* Wenyou.Yang <wenyou.yang@microchip.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <clk.h>
|
|
#include <dm.h>
|
|
#include <timer.h>
|
|
#include <asm/io.h>
|
|
#include <linux/bitops.h>
|
|
|
|
#define AT91_PIT_VALUE 0xfffff
|
|
#define AT91_PIT_PITEN BIT(24) /* Timer Enabled */
|
|
|
|
struct atmel_pit_regs {
|
|
u32 mode;
|
|
u32 status;
|
|
u32 value;
|
|
u32 value_image;
|
|
};
|
|
|
|
struct atmel_pit_platdata {
|
|
struct atmel_pit_regs *regs;
|
|
};
|
|
|
|
static u64 atmel_pit_get_count(struct udevice *dev)
|
|
{
|
|
struct atmel_pit_platdata *plat = dev_get_plat(dev);
|
|
struct atmel_pit_regs *const regs = plat->regs;
|
|
u32 val = readl(®s->value_image);
|
|
|
|
return timer_conv_64(val);
|
|
}
|
|
|
|
static int atmel_pit_probe(struct udevice *dev)
|
|
{
|
|
struct atmel_pit_platdata *plat = dev_get_plat(dev);
|
|
struct atmel_pit_regs *const regs = plat->regs;
|
|
struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
|
struct clk clk;
|
|
ulong clk_rate;
|
|
int ret;
|
|
|
|
ret = clk_get_by_index(dev, 0, &clk);
|
|
if (ret)
|
|
return -EINVAL;
|
|
|
|
clk_rate = clk_get_rate(&clk);
|
|
if (!clk_rate)
|
|
return -EINVAL;
|
|
|
|
uc_priv->clock_rate = clk_rate / 16;
|
|
|
|
writel(AT91_PIT_VALUE | AT91_PIT_PITEN, ®s->mode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int atmel_pit_of_to_plat(struct udevice *dev)
|
|
{
|
|
struct atmel_pit_platdata *plat = dev_get_plat(dev);
|
|
|
|
plat->regs = dev_read_addr_ptr(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct timer_ops atmel_pit_ops = {
|
|
.get_count = atmel_pit_get_count,
|
|
};
|
|
|
|
static const struct udevice_id atmel_pit_ids[] = {
|
|
{ .compatible = "atmel,at91sam9260-pit" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(atmel_pit) = {
|
|
.name = "atmel_pit",
|
|
.id = UCLASS_TIMER,
|
|
.of_match = atmel_pit_ids,
|
|
.of_to_plat = atmel_pit_of_to_plat,
|
|
.plat_auto = sizeof(struct atmel_pit_platdata),
|
|
.probe = atmel_pit_probe,
|
|
.ops = &atmel_pit_ops,
|
|
};
|