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authorGuenter Roeck <linux@roeck-us.net>2017-01-11 02:21:48 +0300
committerGuenter Roeck <linux@roeck-us.net>2017-02-25 01:00:23 +0300
commitdd36f6ce680d55fcafa62b35e589549cd53199b1 (patch)
treec4354aa1edada3789ef6cab207982b496d027506 /drivers/watchdog
parentd3d77b5abc175684a3c42a240ee49931ca51d10d (diff)
downloadlinux-dd36f6ce680d55fcafa62b35e589549cd53199b1.tar.xz
watchdog: digicolor_wdt: Convert to use device managed functions and other improvements
Use device managed functions to simplify error handling, reduce source code size, improve readability, and reduce the likelyhood of bugs. Other improvements as listed below. The conversion was done automatically with coccinelle using the following semantic patches. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches - Replace 'goto l; ... l: return e;' with 'return e;' - Replace 'val = e; return val;' with 'return e;' - Drop assignments to otherwise unused variables - Replace 'if (e) { return expr; }' with 'if (e) return expr;' - Drop remove function - Replace of_iomap() with platform_get_resource() followed by devm_ioremap_resource() - Drop platform_set_drvdata() - Replace &pdev->dev with dev if 'struct device *dev' is a declared variable - Use devm_watchdog_register_driver() to register watchdog device - Replace shutdown function with call to watchdog_stop_on_reboot() Acked-by: Baruch Siach <baruch@tkos.co.il> Tested-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/digicolor_wdt.c48
1 files changed, 12 insertions, 36 deletions
diff --git a/drivers/watchdog/digicolor_wdt.c b/drivers/watchdog/digicolor_wdt.c
index dfe72944822d..870694d9ebc7 100644
--- a/drivers/watchdog/digicolor_wdt.c
+++ b/drivers/watchdog/digicolor_wdt.c
@@ -119,62 +119,40 @@ static struct watchdog_device dc_wdt_wdd = {
static int dc_wdt_probe(struct platform_device *pdev)
{
+ struct resource *res;
struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node;
struct dc_wdt *wdt;
int ret;
wdt = devm_kzalloc(dev, sizeof(struct dc_wdt), GFP_KERNEL);
if (!wdt)
return -ENOMEM;
- platform_set_drvdata(pdev, wdt);
- wdt->base = of_iomap(np, 0);
- if (!wdt->base) {
- dev_err(dev, "Failed to remap watchdog regs");
- return -ENODEV;
- }
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ wdt->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(wdt->base))
+ return PTR_ERR(wdt->base);
- wdt->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(wdt->clk)) {
- ret = PTR_ERR(wdt->clk);
- goto err_iounmap;
- }
+ wdt->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(wdt->clk))
+ return PTR_ERR(wdt->clk);
dc_wdt_wdd.max_timeout = U32_MAX / clk_get_rate(wdt->clk);
dc_wdt_wdd.timeout = dc_wdt_wdd.max_timeout;
- dc_wdt_wdd.parent = &pdev->dev;
+ dc_wdt_wdd.parent = dev;
spin_lock_init(&wdt->lock);
watchdog_set_drvdata(&dc_wdt_wdd, wdt);
watchdog_set_restart_priority(&dc_wdt_wdd, 128);
watchdog_init_timeout(&dc_wdt_wdd, timeout, dev);
- ret = watchdog_register_device(&dc_wdt_wdd);
+ watchdog_stop_on_reboot(&dc_wdt_wdd);
+ ret = devm_watchdog_register_device(dev, &dc_wdt_wdd);
if (ret) {
dev_err(dev, "Failed to register watchdog device");
- goto err_iounmap;
+ return ret;
}
return 0;
-
-err_iounmap:
- iounmap(wdt->base);
- return ret;
-}
-
-static int dc_wdt_remove(struct platform_device *pdev)
-{
- struct dc_wdt *wdt = platform_get_drvdata(pdev);
-
- watchdog_unregister_device(&dc_wdt_wdd);
- iounmap(wdt->base);
-
- return 0;
-}
-
-static void dc_wdt_shutdown(struct platform_device *pdev)
-{
- dc_wdt_stop(&dc_wdt_wdd);
}
static const struct of_device_id dc_wdt_of_match[] = {
@@ -185,8 +163,6 @@ MODULE_DEVICE_TABLE(of, dc_wdt_of_match);
static struct platform_driver dc_wdt_driver = {
.probe = dc_wdt_probe,
- .remove = dc_wdt_remove,
- .shutdown = dc_wdt_shutdown,
.driver = {
.name = "digicolor-wdt",
.of_match_table = dc_wdt_of_match,