Contributors: 8
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Loc Ho |
209 |
70.85% |
1 |
8.33% |
| Guenter Roeck |
54 |
18.31% |
4 |
33.33% |
| Andrew F. Davis |
17 |
5.76% |
2 |
16.67% |
| Dan Carpenter |
9 |
3.05% |
1 |
8.33% |
| Yang Yingliang |
2 |
0.68% |
1 |
8.33% |
| Thomas Gleixner |
2 |
0.68% |
1 |
8.33% |
| Rob Herring |
1 |
0.34% |
1 |
8.33% |
| Fabian Frederick |
1 |
0.34% |
1 |
8.33% |
| Total |
295 |
|
12 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* AppliedMicro X-Gene SoC Reboot Driver
*
* Copyright (c) 2013, Applied Micro Circuits Corporation
* Author: Feng Kan <fkan@apm.com>
* Author: Loc Ho <lho@apm.com>
*
* This driver provides system reboot functionality for APM X-Gene SoC.
* For system shutdown, this is board specify. If a board designer
* implements GPIO shutdown, use the gpio-poweroff.c driver.
*/
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/notifier.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/stat.h>
#include <linux/slab.h>
struct xgene_reboot_context {
struct device *dev;
void __iomem *csr;
u32 mask;
};
static int xgene_restart_handler(struct sys_off_data *data)
{
struct xgene_reboot_context *ctx = data->cb_data;
/* Issue the reboot */
writel(ctx->mask, ctx->csr);
mdelay(1000);
dev_emerg(ctx->dev, "Unable to restart system\n");
return NOTIFY_DONE;
}
static int xgene_reboot_probe(struct platform_device *pdev)
{
struct xgene_reboot_context *ctx;
struct device *dev = &pdev->dev;
int err;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->csr = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(ctx->csr)) {
dev_err(dev, "can not map resource\n");
return PTR_ERR(ctx->csr);
}
if (of_property_read_u32(dev->of_node, "mask", &ctx->mask))
ctx->mask = 0xFFFFFFFF;
ctx->dev = dev;
err = devm_register_sys_off_handler(dev, SYS_OFF_MODE_RESTART, 128,
xgene_restart_handler, ctx);
if (err)
dev_err(dev, "cannot register restart handler (err=%d)\n", err);
return err;
}
static const struct of_device_id xgene_reboot_of_match[] = {
{ .compatible = "apm,xgene-reboot" },
{}
};
static struct platform_driver xgene_reboot_driver = {
.probe = xgene_reboot_probe,
.driver = {
.name = "xgene-reboot",
.of_match_table = xgene_reboot_of_match,
},
};
builtin_platform_driver(xgene_reboot_driver);