watchdog: qcom: 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/7c2d5f3815949faf6d3a0237a7b5f272f00a7ae9.1672418969.git.christophe.jaillet@wanadoo.frSigned-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

drivers/watchdog/qcom-wdt.c

@@ -175,11 +175,6 @@ static const struct watchdog_info qcom_wdt_pt_info = {
 	.identity	= KBUILD_MODNAME,
 };
 
-static void qcom_clk_disable_unprepare(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
 static const struct qcom_wdt_match_data match_data_apcs_tmr = {
 	.offset = reg_offset_data_apcs_tmr,
 	.pretimeout = false,
@@ -226,21 +221,12 @@ static int qcom_wdt_probe(struct platform_device *pdev)
 	if (IS_ERR(wdt->base))
 		return PTR_ERR(wdt->base);
 
-	clk = devm_clk_get(dev, NULL);
+	clk = devm_clk_get_enabled(dev, NULL);
 	if (IS_ERR(clk)) {
 		dev_err(dev, "failed to get input clock\n");
 		return PTR_ERR(clk);
 	}
 
-	ret = clk_prepare_enable(clk);
-	if (ret) {
-		dev_err(dev, "failed to setup clock\n");
-		return ret;
-	}
-	ret = devm_add_action_or_reset(dev, qcom_clk_disable_unprepare, clk);
-	if (ret)
-		return ret;
-
 	/*
 	 * We use the clock rate to calculate the max timeout, so ensure it's
 	 * not zero to avoid a divide-by-zero exception.