summaryrefslogtreecommitdiff
path: root/drivers/watchdog/s3c2410_wdt.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/watchdog/s3c2410_wdt.c')
-rw-r--r--drivers/watchdog/s3c2410_wdt.c58
1 files changed, 26 insertions, 32 deletions
diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
index 6ed97596ca80..adaa43543f0a 100644
--- a/drivers/watchdog/s3c2410_wdt.c
+++ b/drivers/watchdog/s3c2410_wdt.c
@@ -1,5 +1,4 @@
-/* linux/drivers/char/watchdog/s3c2410_wdt.c
- *
+/*
* Copyright (c) 2004 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
*
@@ -17,11 +16,7 @@
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-*/
+ */
#include <linux/module.h>
#include <linux/moduleparam.h>
@@ -37,6 +32,7 @@
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include <linux/delay.h>
@@ -94,8 +90,7 @@ MODULE_PARM_DESC(tmr_atboot,
__MODULE_STRING(S3C2410_WATCHDOG_ATBOOT));
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-MODULE_PARM_DESC(soft_noboot, "Watchdog action, set to 1 to ignore reboots, "
- "0 to reboot (default 0)");
+MODULE_PARM_DESC(soft_noboot, "Watchdog action, set to 1 to ignore reboots, 0 to reboot (default 0)");
/**
* struct s3c2410_wdt_variant - Per-variant config data
@@ -131,7 +126,7 @@ struct s3c2410_wdt {
unsigned long wtdat_save;
struct watchdog_device wdt_device;
struct notifier_block freq_transition;
- struct s3c2410_wdt_variant *drv_data;
+ const struct s3c2410_wdt_variant *drv_data;
struct regmap *pmureg;
};
@@ -310,7 +305,8 @@ static inline int s3c2410wdt_is_running(struct s3c2410_wdt *wdt)
return readl(wdt->reg_base + S3C2410_WTCON) & S3C2410_WTCON_ENABLE;
}
-static int s3c2410wdt_set_heartbeat(struct watchdog_device *wdd, unsigned timeout)
+static int s3c2410wdt_set_heartbeat(struct watchdog_device *wdd,
+ unsigned int timeout)
{
struct s3c2410_wdt *wdt = watchdog_get_drvdata(wdd);
unsigned long freq = clk_get_rate(wdt->clock);
@@ -401,7 +397,7 @@ static const struct watchdog_ops s3c2410wdt_ops = {
.restart = s3c2410wdt_restart,
};
-static struct watchdog_device s3c2410_wdd = {
+static const struct watchdog_device s3c2410_wdd = {
.info = &s3c2410_wdt_ident,
.ops = &s3c2410wdt_ops,
.timeout = S3C2410_WATCHDOG_DEFAULT_TIME,
@@ -507,22 +503,24 @@ static inline unsigned int s3c2410wdt_get_bootstatus(struct s3c2410_wdt *wdt)
return 0;
}
-static inline struct s3c2410_wdt_variant *
+static inline const struct s3c2410_wdt_variant *
s3c2410_get_wdt_drv_data(struct platform_device *pdev)
{
- if (pdev->dev.of_node) {
- const struct of_device_id *match;
- match = of_match_node(s3c2410_wdt_match, pdev->dev.of_node);
- return (struct s3c2410_wdt_variant *)match->data;
- } else {
- return (struct s3c2410_wdt_variant *)
- platform_get_device_id(pdev)->driver_data;
+ const struct s3c2410_wdt_variant *variant;
+
+ variant = of_device_get_match_data(&pdev->dev);
+ if (!variant) {
+ /* Device matched by platform_device_id */
+ variant = (struct s3c2410_wdt_variant *)
+ platform_get_device_id(pdev)->driver_data;
}
+
+ return variant;
}
static int s3c2410wdt_probe(struct platform_device *pdev)
{
- struct device *dev;
+ struct device *dev = &pdev->dev;
struct s3c2410_wdt *wdt;
struct resource *wdt_mem;
struct resource *wdt_irq;
@@ -530,13 +528,11 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
int started = 0;
int ret;
- dev = &pdev->dev;
-
wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
if (!wdt)
return -ENOMEM;
- wdt->dev = &pdev->dev;
+ wdt->dev = dev;
spin_lock_init(&wdt->lock);
wdt->wdt_device = s3c2410_wdd;
@@ -592,7 +588,7 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
/* see if we can actually set the requested timer margin, and if
* not, try the default value */
- watchdog_init_timeout(&wdt->wdt_device, tmr_margin, &pdev->dev);
+ watchdog_init_timeout(&wdt->wdt_device, tmr_margin, dev);
ret = s3c2410wdt_set_heartbeat(&wdt->wdt_device,
wdt->wdt_device.timeout);
if (ret) {
@@ -601,11 +597,10 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
if (started == 0)
dev_info(dev,
- "tmr_margin value out of range, default %d used\n",
- S3C2410_WATCHDOG_DEFAULT_TIME);
+ "tmr_margin value out of range, default %d used\n",
+ S3C2410_WATCHDOG_DEFAULT_TIME);
else
- dev_info(dev, "default timer value is out of range, "
- "cannot start\n");
+ dev_info(dev, "default timer value is out of range, cannot start\n");
}
ret = devm_request_irq(dev, wdt_irq->start, s3c2410wdt_irq, 0,
@@ -619,7 +614,7 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
watchdog_set_restart_priority(&wdt->wdt_device, 128);
wdt->wdt_device.bootstatus = s3c2410wdt_get_bootstatus(wdt);
- wdt->wdt_device.parent = &pdev->dev;
+ wdt->wdt_device.parent = dev;
ret = watchdog_register_device(&wdt->wdt_device);
if (ret) {
@@ -754,7 +749,6 @@ static struct platform_driver s3c2410wdt_driver = {
module_platform_driver(s3c2410wdt_driver);
-MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, "
- "Dimitry Andric <dimitry.andric@tomtom.com>");
+MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Dimitry Andric <dimitry.andric@tomtom.com>");
MODULE_DESCRIPTION("S3C2410 Watchdog Device Driver");
MODULE_LICENSE("GPL");