@@ -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) {
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> --- Note that the order of operations is slightly modified by this patch. The "sys" clk is now prepare_enable()'ed before clk_get("wdt"). --- drivers/watchdog/imgpdc_wdt.c | 31 +++---------------------------- 1 file changed, 3 insertions(+), 28 deletions(-)