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watchdog: imgpdc: Use devm_clk_get_enabled() helper 

The devm_clk_get_enabled() helper:
   - calls devm_clk_get()
   - calls clk_prepare_enable() and registers what is needed in order to
     call clk_disable_unprepare() when needed, as a managed resource.

This simplifies the code and avoids the need of a dedicated function used
with devm_add_action_or_reset().

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/1f8d1ce1e6a63c507a291aea624b1337326cc563.1672483996.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Christophe JAILLET 2022-12-31 11:53:34 +01:00 committed by Wim Van Sebroeck
parent 4de0224c6f
commit c4b8e92bc1
1 changed files with 3 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/watchdog/imgpdc_wdt.c
View File

@ -175,16 +175,11 @@ static const struct watchdog_ops pdc_wdt_ops = {
.restart = pdc_wdt_restart,
};
static void pdc_clk_disable_unprepare(void *data)
{
clk_disable_unprepare(data);
}
static int pdc_wdt_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
u64 div;
int ret, val;
int val;
unsigned long clk_rate;
struct pdc_wdt_dev *pdc_wdt;
@ -196,38 +191,18 @@ static int pdc_wdt_probe(struct platform_device *pdev)
if (IS_ERR(pdc_wdt->base))
return PTR_ERR(pdc_wdt->base);
pdc_wdt->sys_clk = devm_clk_get(dev, "sys");
pdc_wdt->sys_clk = devm_clk_get_enabled(dev, "sys");
if (IS_ERR(pdc_wdt->sys_clk)) {
dev_err(dev, "failed to get the sys clock\n");
return PTR_ERR(pdc_wdt->sys_clk);
}
pdc_wdt->wdt_clk = devm_clk_get(dev, "wdt");
pdc_wdt->wdt_clk = devm_clk_get_enabled(dev, "wdt");
if (IS_ERR(pdc_wdt->wdt_clk)) {
dev_err(dev, "failed to get the wdt clock\n");
return PTR_ERR(pdc_wdt->wdt_clk);
}
ret = clk_prepare_enable(pdc_wdt->sys_clk);
if (ret) {
dev_err(dev, "could not prepare or enable sys clock\n");
return ret;
}
ret = devm_add_action_or_reset(dev, pdc_clk_disable_unprepare,
pdc_wdt->sys_clk);
if (ret)
return ret;
ret = clk_prepare_enable(pdc_wdt->wdt_clk);
if (ret) {
dev_err(dev, "could not prepare or enable wdt clock\n");
return ret;
}
ret = devm_add_action_or_reset(dev, pdc_clk_disable_unprepare,
pdc_wdt->wdt_clk);
if (ret)
return ret;
/* We use the clock rate to calculate the max timeout */
clk_rate = clk_get_rate(pdc_wdt->wdt_clk);
if (clk_rate == 0) {