71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
|
|
*
|
|
* Derived from linux/drivers/power/reset/syscon-reboot.c:
|
|
* Copyright (C) 2013, Applied Micro Circuits Corporation
|
|
* Author: Feng Kan <fkan@apm.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <regmap.h>
|
|
#include <sysreset.h>
|
|
#include <syscon.h>
|
|
#include <linux/err.h>
|
|
|
|
struct syscon_reboot_priv {
|
|
struct regmap *regmap;
|
|
unsigned int offset;
|
|
unsigned int mask;
|
|
};
|
|
|
|
static int syscon_reboot_request(struct udevice *dev, enum sysreset_t type)
|
|
{
|
|
struct syscon_reboot_priv *priv = dev_get_priv(dev);
|
|
ulong driver_data = dev_get_driver_data(dev);
|
|
|
|
if (type != driver_data)
|
|
return -EPROTONOSUPPORT;
|
|
|
|
regmap_write(priv->regmap, priv->offset, priv->mask);
|
|
|
|
return -EINPROGRESS;
|
|
}
|
|
|
|
static struct sysreset_ops syscon_reboot_ops = {
|
|
.request = syscon_reboot_request,
|
|
};
|
|
|
|
int syscon_reboot_probe(struct udevice *dev)
|
|
{
|
|
struct syscon_reboot_priv *priv = dev_get_priv(dev);
|
|
|
|
priv->regmap = syscon_regmap_lookup_by_phandle(dev, "regmap");
|
|
if (IS_ERR(priv->regmap)) {
|
|
pr_err("unable to find regmap\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
priv->offset = dev_read_u32_default(dev, "offset", 0);
|
|
priv->mask = dev_read_u32_default(dev, "mask", 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id syscon_reboot_ids[] = {
|
|
{ .compatible = "syscon-reboot", .data = SYSRESET_COLD },
|
|
{ .compatible = "syscon-poweroff", .data = SYSRESET_POWER_OFF },
|
|
{ /* sentinel */ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(syscon_reboot) = {
|
|
.name = "syscon_reboot",
|
|
.id = UCLASS_SYSRESET,
|
|
.of_match = syscon_reboot_ids,
|
|
.probe = syscon_reboot_probe,
|
|
.priv_auto_alloc_size = sizeof(struct syscon_reboot_priv),
|
|
.ops = &syscon_reboot_ops,
|
|
};
|