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Message-Id: <20210920172249.28206-4-digetx@gmail.com>
Date: Mon, 20 Sep 2021 20:22:48 +0300
From: Dmitry Osipenko <digetx@...il.com>
To: Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>,
Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
MyungJoo Ham <myungjoo.ham@...sung.com>,
Stephen Boyd <sboyd@...nel.org>,
Kyungmin Park <kyungmin.park@...sung.com>,
Chanwoo Choi <cw00.choi@...sung.com>
Cc: linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-pm@...r.kernel.org
Subject: [PATCH v2 3/4] PM / devfreq: tegra30: Use resource-managed helpers
Use resource-managed API helpers to simplify driver's probe() function,
making code cleaner.
Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
drivers/devfreq/tegra30-devfreq.c | 107 +++++++++++++-----------------
1 file changed, 46 insertions(+), 61 deletions(-)
diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
index 10661eb2aed8..d83fdc2713ed 100644
--- a/drivers/devfreq/tegra30-devfreq.c
+++ b/drivers/devfreq/tegra30-devfreq.c
@@ -178,7 +178,6 @@ struct tegra_devfreq_soc_data {
struct tegra_devfreq {
struct devfreq *devfreq;
- struct opp_table *opp_table;
struct reset_control *reset;
struct clk *clock;
@@ -789,6 +788,39 @@ static struct devfreq_governor tegra_devfreq_governor = {
.event_handler = tegra_governor_event_handler,
};
+static void devm_tegra_devfreq_deinit_hw(void *data)
+{
+ struct tegra_devfreq *tegra = data;
+
+ reset_control_reset(tegra->reset);
+ clk_disable_unprepare(tegra->clock);
+}
+
+static int devm_tegra_devfreq_init_hw(struct device *dev,
+ struct tegra_devfreq *tegra)
+{
+ int err;
+
+ err = clk_prepare_enable(tegra->clock);
+ if (err) {
+ dev_err(dev, "Failed to prepare and enable ACTMON clock\n");
+ return err;
+ }
+
+ err = devm_add_action_or_reset(dev, devm_tegra_devfreq_deinit_hw,
+ tegra);
+ if (err)
+ return err;
+
+ err = reset_control_reset(tegra->reset);
+ if (err) {
+ dev_err(dev, "Failed to reset hardware: %d\n", err);
+ return err;
+ }
+
+ return err;
+}
+
static int tegra_devfreq_probe(struct platform_device *pdev)
{
u32 hw_version = BIT(tegra_sku_info.soc_speedo_id);
@@ -842,38 +874,26 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
return err;
}
- tegra->opp_table = dev_pm_opp_set_supported_hw(&pdev->dev,
- &hw_version, 1);
- err = PTR_ERR_OR_ZERO(tegra->opp_table);
+ err = devm_pm_opp_set_supported_hw(&pdev->dev, &hw_version, 1);
if (err) {
dev_err(&pdev->dev, "Failed to set supported HW: %d\n", err);
return err;
}
- err = dev_pm_opp_of_add_table_noclk(&pdev->dev, 0);
+ err = devm_pm_opp_of_add_table_noclk(&pdev->dev, 0);
if (err) {
dev_err(&pdev->dev, "Failed to add OPP table: %d\n", err);
- goto put_hw;
- }
-
- err = clk_prepare_enable(tegra->clock);
- if (err) {
- dev_err(&pdev->dev,
- "Failed to prepare and enable ACTMON clock\n");
- goto remove_table;
+ return err;
}
- err = reset_control_reset(tegra->reset);
- if (err) {
- dev_err(&pdev->dev, "Failed to reset hardware: %d\n", err);
- goto disable_clk;
- }
+ err = devm_tegra_devfreq_init_hw(&pdev->dev, tegra);
+ if (err)
+ return err;
rate = clk_round_rate(tegra->emc_clock, ULONG_MAX);
if (rate < 0) {
dev_err(&pdev->dev, "Failed to round clock rate: %ld\n", rate);
- err = rate;
- goto disable_clk;
+ return rate;
}
tegra->max_freq = rate / KHZ;
@@ -892,52 +912,18 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
INIT_DELAYED_WORK(&tegra->cpufreq_update_work,
tegra_actmon_delayed_update);
- err = devfreq_add_governor(&tegra_devfreq_governor);
+ err = devm_devfreq_add_governor(&pdev->dev, &tegra_devfreq_governor);
if (err) {
dev_err(&pdev->dev, "Failed to add governor: %d\n", err);
- goto remove_opps;
+ return err;
}
tegra_devfreq_profile.initial_freq = clk_get_rate(tegra->emc_clock);
- devfreq = devfreq_add_device(&pdev->dev, &tegra_devfreq_profile,
- "tegra_actmon", NULL);
- if (IS_ERR(devfreq)) {
- err = PTR_ERR(devfreq);
- goto remove_governor;
- }
-
- return 0;
-
-remove_governor:
- devfreq_remove_governor(&tegra_devfreq_governor);
-
-remove_opps:
- dev_pm_opp_remove_all_dynamic(&pdev->dev);
-
- reset_control_reset(tegra->reset);
-disable_clk:
- clk_disable_unprepare(tegra->clock);
-remove_table:
- dev_pm_opp_of_remove_table(&pdev->dev);
-put_hw:
- dev_pm_opp_put_supported_hw(tegra->opp_table);
-
- return err;
-}
-
-static int tegra_devfreq_remove(struct platform_device *pdev)
-{
- struct tegra_devfreq *tegra = platform_get_drvdata(pdev);
-
- devfreq_remove_device(tegra->devfreq);
- devfreq_remove_governor(&tegra_devfreq_governor);
-
- reset_control_reset(tegra->reset);
- clk_disable_unprepare(tegra->clock);
-
- dev_pm_opp_of_remove_table(&pdev->dev);
- dev_pm_opp_put_supported_hw(tegra->opp_table);
+ devfreq = devm_devfreq_add_device(&pdev->dev, &tegra_devfreq_profile,
+ "tegra_actmon", NULL);
+ if (IS_ERR(devfreq))
+ return PTR_ERR(devfreq);
return 0;
}
@@ -967,7 +953,6 @@ MODULE_DEVICE_TABLE(of, tegra_devfreq_of_match);
static struct platform_driver tegra_devfreq_driver = {
.probe = tegra_devfreq_probe,
- .remove = tegra_devfreq_remove,
.driver = {
.name = "tegra-devfreq",
.of_match_table = tegra_devfreq_of_match,
--
2.32.0
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