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Commit 16ac4abe authored by Viresh Kumar's avatar Viresh Kumar Committed by Wim Van Sebroeck
Browse files

watchdog: sp805_wdt: add pm callbacks to support standby/S2R/hibernation 



Signed-off-by: default avatarViresh Kumar <viresh.kumar@st.com>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent 474ef121

drivers/watchdog/sp805_wdt.c

+33 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 
#include <linux/miscdevice.h>

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/pm.h>

#include <linux/slab.h>

#include <linux/spinlock.h>

#include <linux/types.h>
@@ -351,6 +352,37 @@ static int __devexit sp805_wdt_remove(struct amba_device *adev) 
	return 0;

}



#ifdef CONFIG_PM

static int sp805_wdt_suspend(struct device *dev)

{

	if (test_bit(WDT_BUSY, &wdt->status)) {

		wdt_disable();

		clk_disable(wdt->clk);

	}



	return 0;

}



static int sp805_wdt_resume(struct device *dev)

{

	int ret = 0;



	if (test_bit(WDT_BUSY, &wdt->status)) {

		ret = clk_enable(wdt->clk);

		if (ret) {

			dev_err(dev, "clock enable fail");

			return ret;

		}

		wdt_enable();

	}



	return ret;

}

#endif /* CONFIG_PM */



static SIMPLE_DEV_PM_OPS(sp805_wdt_dev_pm_ops, sp805_wdt_suspend,

		sp805_wdt_resume);



static struct amba_id sp805_wdt_ids[] = {

	{

		.id	= 0x00141805,
@@ -364,6 +396,7 @@ MODULE_DEVICE_TABLE(amba, sp805_wdt_ids); 
static struct amba_driver sp805_wdt_driver = {

	.drv = {

		.name	= MODULE_NAME,

		.pm	= &sp805_wdt_dev_pm_ops,

	},

	.id_table	= sp805_wdt_ids,

	.probe		= sp805_wdt_probe,