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authorViresh Kumar <viresh.kumar@st.com>2012-02-24 09:42:37 (GMT)
committerWim Van Sebroeck <wim@iguana.be>2012-03-27 17:58:45 (GMT)
commit16ac4abe0d0ea0a8d42d6a2a7de2a4a00bbf5b40 (patch)
tree1b602e1c94f51b83f66a9c77e8fcff66cae5fa8b /drivers/watchdog
parent474ef121008a2992bcc496930166ced89bda23d2 (diff)
downloadlinux-16ac4abe0d0ea0a8d42d6a2a7de2a4a00bbf5b40.tar.xz
watchdog: sp805_wdt: add pm callbacks to support standby/S2R/hibernation
Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/sp805_wdt.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c
index 3ff9e47..2b0939a 100644
--- a/drivers/watchdog/sp805_wdt.c
+++ b/drivers/watchdog/sp805_wdt.c
@@ -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,