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authorAlban Bedel <albeu@free.fr>2015-11-24 01:00:33 +0100
committerPhilipp Zabel <p.zabel@pengutronix.de>2015-11-25 10:49:58 +0100
commitba64e27e9d3c558549f765869c6a471114c0f328 (patch)
tree7770b43f2a8a2d2dc554102b0f85be37967f964d /drivers/reset/reset-ath79.c
parent3e14cd4c04cdb8296f478ed3e10d8d5ffbb7f262 (diff)
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: Alban Bedel <albeu@free.fr> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'drivers/reset/reset-ath79.c')
-rw-r--r--drivers/reset/reset-ath79.c30
1 files changed, 29 insertions, 1 deletions
diff --git a/drivers/reset/reset-ath79.c b/drivers/reset/reset-ath79.c
index 9aaf646ece55..692fc890e94b 100644
--- a/drivers/reset/reset-ath79.c
+++ b/drivers/reset/reset-ath79.c
@@ -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;

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