mirror of
https://github.com/u-boot/u-boot.git
synced 2025-04-27 07:51:38 +00:00
d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
93 lines
2.2 KiB
C
93 lines
2.2 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>
|
|
#include <linux/printk.h>
|
|
|
|
struct syscon_reboot_priv {
|
|
struct regmap *regmap;
|
|
unsigned int offset;
|
|
unsigned int mask;
|
|
unsigned int value;
|
|
};
|
|
|
|
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_update_bits(priv->regmap, priv->offset, priv->mask, priv->value);
|
|
|
|
return -EINPROGRESS;
|
|
}
|
|
|
|
static struct sysreset_ops syscon_reboot_ops = {
|
|
.request = syscon_reboot_request,
|
|
};
|
|
|
|
static int syscon_reboot_probe(struct udevice *dev)
|
|
{
|
|
struct syscon_reboot_priv *priv = dev_get_priv(dev);
|
|
int err;
|
|
int mask_err, value_err;
|
|
|
|
priv->regmap = syscon_regmap_lookup_by_phandle(dev, "regmap");
|
|
if (IS_ERR(priv->regmap)) {
|
|
pr_err("unable to find regmap\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
err = dev_read_u32(dev, "offset", &priv->offset);
|
|
if (err) {
|
|
pr_err("unable to find offset\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
mask_err = dev_read_u32(dev, "mask", &priv->mask);
|
|
value_err = dev_read_u32(dev, "value", &priv->value);
|
|
if (mask_err && value_err) {
|
|
pr_err("unable to find mask and value\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (value_err) {
|
|
/* support old binding */
|
|
priv->value = priv->mask;
|
|
priv->mask = 0xffffffff;
|
|
} else if (mask_err) {
|
|
/* support value without mask*/
|
|
priv->mask = 0xffffffff;
|
|
}
|
|
|
|
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 = sizeof(struct syscon_reboot_priv),
|
|
.ops = &syscon_reboot_ops,
|
|
};
|