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watchdog: imgpdc_wdt: use core restart handler

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Get rid of the custom restart handler by using the one provided by the
watchdog core.

Signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Damien Riegel 2015-11-16 12:28:03 -05:00 committed by Wim Van Sebroeck
parent d3b081857c
commit 0f10d9c57e
1 changed files with 12 additions and 22 deletions
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34
drivers/watchdog/imgpdc_wdt.c
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@ -45,7 +45,6 @@
#include <linux/log2.h> #include <linux/log2.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/watchdog.h> #include <linux/watchdog.h>
@ -87,7 +86,6 @@ struct pdc_wdt_dev {
struct clk *wdt_clk; struct clk *wdt_clk;
struct clk *sys_clk; struct clk *sys_clk;
void __iomem *base; void __iomem *base;
struct notifier_block restart_handler;
}; };
static int pdc_wdt_keepalive(struct watchdog_device *wdt_dev) static int pdc_wdt_keepalive(struct watchdog_device *wdt_dev)
@ -152,6 +150,16 @@ static int pdc_wdt_start(struct watchdog_device *wdt_dev)
return 0; return 0;
} }
static int pdc_wdt_restart(struct watchdog_device *wdt_dev)
{
struct pdc_wdt_dev *wdt = watchdog_get_drvdata(wdt_dev);
/* Assert SOFT_RESET */
writel(0x1, wdt->base + PDC_WDT_SOFT_RESET);
return 0;
}
static struct watchdog_info pdc_wdt_info = { static struct watchdog_info pdc_wdt_info = {
.identity = "IMG PDC Watchdog", .identity = "IMG PDC Watchdog",
.options = WDIOF_SETTIMEOUT | .options = WDIOF_SETTIMEOUT |
@ -165,20 +173,9 @@ static const struct watchdog_ops pdc_wdt_ops = {
.stop = pdc_wdt_stop, .stop = pdc_wdt_stop,
.ping = pdc_wdt_keepalive, .ping = pdc_wdt_keepalive,
.set_timeout = pdc_wdt_set_timeout, .set_timeout = pdc_wdt_set_timeout,
.restart = pdc_wdt_restart,
}; };
static int pdc_wdt_restart(struct notifier_block *this, unsigned long mode,
void *cmd)
{
struct pdc_wdt_dev *wdt = container_of(this, struct pdc_wdt_dev,
restart_handler);
/* Assert SOFT_RESET */
writel(0x1, wdt->base + PDC_WDT_SOFT_RESET);
return NOTIFY_OK;
}
static int pdc_wdt_probe(struct platform_device *pdev) static int pdc_wdt_probe(struct platform_device *pdev)
{ {
u64 div; u64 div;
@ -282,6 +279,7 @@ static int pdc_wdt_probe(struct platform_device *pdev)
} }
watchdog_set_nowayout(&pdc_wdt->wdt_dev, nowayout); watchdog_set_nowayout(&pdc_wdt->wdt_dev, nowayout);
watchdog_set_restart_priority(&pdc_wdt->wdt_dev, 128);
platform_set_drvdata(pdev, pdc_wdt); platform_set_drvdata(pdev, pdc_wdt);
@ -289,13 +287,6 @@ static int pdc_wdt_probe(struct platform_device *pdev)
if (ret) if (ret)
goto disable_wdt_clk; goto disable_wdt_clk;
pdc_wdt->restart_handler.notifier_call = pdc_wdt_restart;
pdc_wdt->restart_handler.priority = 128;
ret = register_restart_handler(&pdc_wdt->restart_handler);
if (ret)
dev_warn(&pdev->dev, "failed to register restart handler: %d\n",
ret);
return 0; return 0;
disable_wdt_clk: disable_wdt_clk:
@ -316,7 +307,6 @@ static int pdc_wdt_remove(struct platform_device *pdev)
{ {
struct pdc_wdt_dev *pdc_wdt = platform_get_drvdata(pdev); struct pdc_wdt_dev *pdc_wdt = platform_get_drvdata(pdev);
unregister_restart_handler(&pdc_wdt->restart_handler);
pdc_wdt_stop(&pdc_wdt->wdt_dev); pdc_wdt_stop(&pdc_wdt->wdt_dev);
watchdog_unregister_device(&pdc_wdt->wdt_dev); watchdog_unregister_device(&pdc_wdt->wdt_dev);
clk_disable_unprepare(pdc_wdt->wdt_clk); clk_disable_unprepare(pdc_wdt->wdt_clk);