mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-25 06:00:43 +00:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
89 lines
1.9 KiB
C
89 lines
1.9 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>
|
|
|
|
#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 int atmel_pit_get_count(struct udevice *dev, u64 *count)
|
|
{
|
|
struct atmel_pit_platdata *plat = dev_get_platdata(dev);
|
|
struct atmel_pit_regs *const regs = plat->regs;
|
|
u32 val = readl(®s->value_image);
|
|
|
|
*count = timer_conv_64(val);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int atmel_pit_probe(struct udevice *dev)
|
|
{
|
|
struct atmel_pit_platdata *plat = dev_get_platdata(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_ofdata_to_platdata(struct udevice *dev)
|
|
{
|
|
struct atmel_pit_platdata *plat = dev_get_platdata(dev);
|
|
|
|
plat->regs = (struct atmel_pit_regs *)devfdt_get_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,
|
|
.ofdata_to_platdata = atmel_pit_ofdata_to_platdata,
|
|
.platdata_auto_alloc_size = sizeof(struct atmel_pit_platdata),
|
|
.probe = atmel_pit_probe,
|
|
.ops = &atmel_pit_ops,
|
|
.flags = DM_FLAG_PRE_RELOC,
|
|
};
|