Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Renesas R-Mobile Reset Driver
|
|
*
|
|
* Copyright (C) 2014 Glider bvba
|
|
*/
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/module.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/printk.h>
|
|
#include <linux/reboot.h>
|
|
|
|
/* SYSC Register Bank 2 */
|
|
#define RESCNT2 0x20 /* Reset Control Register 2 */
|
|
|
|
/* Reset Control Register 2 */
|
|
#define RESCNT2_PRES 0x80000000 /* Soft power-on reset */
|
|
|
|
static int rmobile_reset_handler(struct sys_off_data *data)
|
|
{
|
|
void __iomem *sysc_base2 = (void __iomem *)data->cb_data;
|
|
|
|
/* Let's assume we have acquired the HPB semaphore */
|
|
writel(RESCNT2_PRES, sysc_base2 + RESCNT2);
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static int rmobile_reset_probe(struct platform_device *pdev)
|
|
{
|
|
void __iomem *sysc_base2;
|
|
int error;
|
|
|
|
sysc_base2 = devm_platform_ioremap_resource(pdev, 1);
|
|
if (IS_ERR(sysc_base2))
|
|
return PTR_ERR(sysc_base2);
|
|
|
|
error = devm_register_sys_off_handler(&pdev->dev,
|
|
SYS_OFF_MODE_RESTART,
|
|
SYS_OFF_PRIO_HIGH,
|
|
rmobile_reset_handler,
|
|
(__force void *)sysc_base2);
|
|
if (error) {
|
|
dev_err(&pdev->dev,
|
|
"cannot register restart handler (err=%d)\n", error);
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id rmobile_reset_of_match[] = {
|
|
{ .compatible = "renesas,sysc-rmobile", },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, rmobile_reset_of_match);
|
|
|
|
static struct platform_driver rmobile_reset_driver = {
|
|
.probe = rmobile_reset_probe,
|
|
.driver = {
|
|
.name = "rmobile_reset",
|
|
.of_match_table = rmobile_reset_of_match,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(rmobile_reset_driver);
|
|
|
|
MODULE_DESCRIPTION("Renesas R-Mobile Reset Driver");
|
|
MODULE_AUTHOR("Geert Uytterhoeven <geert+renesas@glider.be>");
|
|
MODULE_LICENSE("GPL v2");
|