linux-kernel - [PATCH v2 14/19] PM / devfreq: tegra: Move governor registration to driver's probe

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Message-Id: <20190415145505.18397-15-digetx@gmail.com>
Date:   Mon, 15 Apr 2019 17:55:00 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>
Cc:     linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: [PATCH v2 14/19] PM / devfreq: tegra: Move governor registration to driver's probe

There is no need to register the ACTMON's governor separately from
the driver, hence let's move the registration into the driver's probe
function for consistency and to make code cleaner a tad.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/devfreq/tegra-devfreq.c | 44 +++++++++------------------------
 1 file changed, 12 insertions(+), 32 deletions(-)

diff --git a/drivers/devfreq/tegra-devfreq.c b/drivers/devfreq/tegra-devfreq.c
index 832e4f5aa11b..46c61af8ca33 100644
--- a/drivers/devfreq/tegra-devfreq.c
+++ b/drivers/devfreq/tegra-devfreq.c
@@ -673,6 +673,12 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, tegra);
 
+	err = devfreq_add_governor(&tegra_devfreq_governor);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to add governor: %d\n", err);
+		goto remove_opps;
+	}
+
 	tegra_devfreq_profile.initial_freq = clk_get_rate(tegra->emc_clock);
 	tegra->devfreq = devfreq_add_device(&pdev->dev,
 					    &tegra_devfreq_profile,
@@ -680,7 +686,7 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
 					    NULL);
 	if (IS_ERR(tegra->devfreq)) {
 		err = PTR_ERR(tegra->devfreq);
-		goto remove_opps;
+		goto remove_governor;
 	}
 
 	err = request_threaded_irq(irq, NULL, actmon_thread_isr, IRQF_ONESHOT,
@@ -706,6 +712,9 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
 remove_devfreq:
 	devfreq_remove_device(tegra->devfreq);
 
+remove_governor:
+	devfreq_remove_governor(&tegra_devfreq_governor);
+
 remove_opps:
 	dev_pm_opp_remove_all_dynamic(&pdev->dev);
 
@@ -729,7 +738,7 @@ static int tegra_devfreq_remove(struct platform_device *pdev)
 	reset_control_reset(tegra->reset);
 	clk_disable_unprepare(tegra->clock);
 
-	return 0;
+	return devfreq_remove_governor(&tegra_devfreq_governor);
 }
 
 static const struct of_device_id tegra_devfreq_of_match[] = {
@@ -747,36 +756,7 @@ static struct platform_driver tegra_devfreq_driver = {
 		.of_match_table = tegra_devfreq_of_match,
 	},
 };
-
-static int __init tegra_devfreq_init(void)
-{
-	int ret = 0;
-
-	ret = devfreq_add_governor(&tegra_devfreq_governor);
-	if (ret) {
-		pr_err("%s: failed to add governor: %d\n", __func__, ret);
-		return ret;
-	}
-
-	ret = platform_driver_register(&tegra_devfreq_driver);
-	if (ret)
-		devfreq_remove_governor(&tegra_devfreq_governor);
-
-	return ret;
-}
-module_init(tegra_devfreq_init)
-
-static void __exit tegra_devfreq_exit(void)
-{
-	int ret = 0;
-
-	platform_driver_unregister(&tegra_devfreq_driver);
-
-	ret = devfreq_remove_governor(&tegra_devfreq_governor);
-	if (ret)
-		pr_err("%s: failed to remove governor: %d\n", __func__, ret);
-}
-module_exit(tegra_devfreq_exit)
+module_platform_driver(tegra_devfreq_driver);
 
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("Tegra devfreq driver");
-- 
2.21.0