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PM / devfreq: exynos: Use Use devm_clk_get_enabled() helpers

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The devm_clk_get_enabled() helpers:
    - call devm_clk_get()
    - call clk_prepare_enable() and register what is needed in order to
     call clk_disable_unprepare() when needed, as a managed resource.

This simplifies the code and avoids the calls to clk_disable_unprepare().

While at it, use dev_err_probe consistently, and use its return value
to return the error code.

Link: https://lore.kernel.org/lkml/20240510094034.12493-1-linux.amoon@gmail.com/
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Anand Moon 2024-05-10 15:10:24 +05:30 committed by Chanwoo Choi
parent 53e4e2b517
commit 629277b7f5
1 changed files with 5 additions and 17 deletions
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22
drivers/devfreq/exynos-bus.c
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@ -160,7 +160,6 @@ static void exynos_bus_exit(struct device *dev)
platform_device_unregister(bus->icc_pdev);
dev_pm_opp_of_remove_table(dev);
clk_disable_unprepare(bus->clk);
dev_pm_opp_put_regulators(bus->opp_token);
}
@ -171,7 +170,6 @@ static void exynos_bus_passive_exit(struct device *dev)
platform_device_unregister(bus->icc_pdev);
dev_pm_opp_of_remove_table(dev);
clk_disable_unprepare(bus->clk);
}
static int exynos_bus_parent_parse_of(struct device_node *np,
@ -247,23 +245,16 @@ static int exynos_bus_parse_of(struct device_node *np,
int ret;
/* Get the clock to provide each bus with source clock */
bus->clk = devm_clk_get(dev, "bus");
if (IS_ERR(bus->clk)) {
dev_err(dev, "failed to get bus clock\n");
return PTR_ERR(bus->clk);
}
ret = clk_prepare_enable(bus->clk);
if (ret < 0) {
dev_err(dev, "failed to get enable clock\n");
return ret;
}
bus->clk = devm_clk_get_enabled(dev, "bus");
if (IS_ERR(bus->clk))
return dev_err_probe(dev, PTR_ERR(bus->clk),
"failed to get bus clock\n");
/* Get the freq and voltage from OPP table to scale the bus freq */
ret = dev_pm_opp_of_add_table(dev);
if (ret < 0) {
dev_err(dev, "failed to get OPP table\n");
goto err_clk;
return ret;
}
rate = clk_get_rate(bus->clk);
@ -281,8 +272,6 @@ static int exynos_bus_parse_of(struct device_node *np,
err_opp:
dev_pm_opp_of_remove_table(dev);
err_clk:
clk_disable_unprepare(bus->clk);
return ret;
}
@ -453,7 +442,6 @@ static int exynos_bus_probe(struct platform_device *pdev)
err:
dev_pm_opp_of_remove_table(dev);
clk_disable_unprepare(bus->clk);
err_reg:
dev_pm_opp_put_regulators(bus->opp_token);