linux-kernel - [PATCH 9/9] clocksource/drivers/timer-ti-dm: Get clock in probe with devm_clk

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Date:   Mon, 15 Aug 2022 16:12:50 +0300
From:   Tony Lindgren <tony@...mide.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     Aaro Koskinen <aaro.koskinen@....fi>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Janusz Krzysztofik <jmkrzyszt@...il.com>,
        Keerthy <j-keerthy@...com>,
        Ladislav Michl <ladis@...ux-mips.org>,
        Nishanth Menon <nm@...com>, Suman Anna <s-anna@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 9/9] clocksource/drivers/timer-ti-dm: Get clock in probe with devm_clk_get()

We can simplify the code a bit by getting the clock in probe, and using
devm_clk_get(). This will also make further changes easier as the clock
is available in probe instead of prepare.

Signed-off-by: Tony Lindgren <tony@...mide.com>
---
 drivers/clocksource/timer-ti-dm.c | 24 +++++++++---------------
 1 file changed, 9 insertions(+), 15 deletions(-)

diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -473,18 +473,6 @@ static int omap_dm_timer_prepare(struct dmtimer *timer)
 	struct device *dev = &timer->pdev->dev;
 	int rc;
 
-	/*
-	 * FIXME: OMAP1 devices do not use the clock framework for dmtimers so
-	 * do not call clk_get() for these devices.
-	 */
-	if (!timer->omap1) {
-		timer->fclk = clk_get(&timer->pdev->dev, "fck");
-		if (WARN_ON_ONCE(IS_ERR(timer->fclk))) {
-			dev_err(&timer->pdev->dev, ": No fclk handle.\n");
-			return -EINVAL;
-		}
-	}
-
 	rc = pm_runtime_resume_and_get(dev);
 	if (rc)
 		return rc;
@@ -650,8 +638,6 @@ static int omap_dm_timer_free(struct omap_dm_timer *cookie)
 	if (unlikely(!timer))
 		return -EINVAL;
 
-	clk_put(timer->fclk);
-
 	WARN_ON(!timer->reserved);
 	timer->reserved = 0;
 	return 0;
@@ -1098,7 +1084,6 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
 	if (timer->irq < 0)
 		return timer->irq;
 
-	timer->fclk = ERR_PTR(-ENODEV);
 	timer->io_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(timer->io_base))
 		return PTR_ERR(timer->io_base);
@@ -1122,6 +1107,15 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
 
 	timer->omap1 = timer->capability & OMAP_TIMER_NEEDS_RESET;
 
+	/* OMAP1 devices do not yet use the clock framework for dmtimers */
+	if (!timer->omap1) {
+		timer->fclk = devm_clk_get(dev, "fck");
+		if (IS_ERR(timer->fclk))
+			return PTR_ERR(timer->fclk);
+	} else {
+		timer->fclk = ERR_PTR(-ENODEV);
+	}
+
 	if (!(timer->capability & OMAP_TIMER_ALWON)) {
 		timer->nb.notifier_call = omap_timer_context_notifier;
 		cpu_pm_register_notifier(&timer->nb);
-- 
2.37.1