Commit ba64e27e authored by Alban Bedel's avatar Alban Bedel Committed by Philipp Zabel
Browse files

reset: ath79: Add system restart support 



Add a system restart handler that use the FULL_CHIP_RESET bit of the
reset controller.

Signed-off-by: default avatarAlban Bedel <albeu@free.fr>
Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent 3e14cd4c

drivers/reset/reset-ath79.c

+29 −1
Original line number Diff line number Diff line
@@ -15,13 +15,17 @@ 
#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/reset-controller.h>

#include <linux/reboot.h>



struct ath79_reset {

	struct reset_controller_dev rcdev;

	struct notifier_block restart_nb;

	void __iomem *base;

	spinlock_t lock;

};



#define FULL_CHIP_RESET 24



static int ath79_reset_update(struct reset_controller_dev *rcdev,

			unsigned long id, bool assert)

{
@@ -72,10 +76,22 @@ static struct reset_control_ops ath79_reset_ops = { 
	.status = ath79_reset_status,

};



static int ath79_reset_restart_handler(struct notifier_block *nb,

				unsigned long action, void *data)

{

	struct ath79_reset *ath79_reset =

		container_of(nb, struct ath79_reset, restart_nb);



	ath79_reset_assert(&ath79_reset->rcdev, FULL_CHIP_RESET);



	return NOTIFY_DONE;

}



static int ath79_reset_probe(struct platform_device *pdev)

{

	struct ath79_reset *ath79_reset;

	struct resource *res;

	int err;



	ath79_reset = devm_kzalloc(&pdev->dev,

				sizeof(*ath79_reset), GFP_KERNEL);
@@ -96,13 +112,25 @@ static int ath79_reset_probe(struct platform_device *pdev) 
	ath79_reset->rcdev.of_reset_n_cells = 1;

	ath79_reset->rcdev.nr_resets = 32;



	return reset_controller_register(&ath79_reset->rcdev);

	err = reset_controller_register(&ath79_reset->rcdev);

	if (err)

		return err;



	ath79_reset->restart_nb.notifier_call = ath79_reset_restart_handler;

	ath79_reset->restart_nb.priority = 128;



	err = register_restart_handler(&ath79_reset->restart_nb);

	if (err)

		dev_warn(&pdev->dev, "Failed to register restart handler\n");



	return 0;

}



static int ath79_reset_remove(struct platform_device *pdev)

{

	struct ath79_reset *ath79_reset = platform_get_drvdata(pdev);



	unregister_restart_handler(&ath79_reset->restart_nb);

	reset_controller_unregister(&ath79_reset->rcdev);



	return 0;