[PATCH mvebu v2 10/10] cpufreq: armada-37xx: Fix module unloading
From: Pali Rohár <pali@kernel.org>
Date: 2021-01-14 12:42:50
Also in:
linux-clk, lkml
Subsystem:
arm/marvell kirkwood and armada 370, 375, 38x, 39x, xp, 3700, 7k/8k, cn9130 soc support, cpu frequency scaling framework, the rest · Maintainers:
Andrew Lunn, Gregory Clement, Sebastian Hesselbarth, "Rafael J. Wysocki", Viresh Kumar, Linus Torvalds
This driver is missing module_exit hook. Add proper driver exit function which unregisters the platform device and cleans up the data. Signed-off-by: Pali Rohár <pali@kernel.org> --- drivers/cpufreq/armada-37xx-cpufreq.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/drivers/cpufreq/armada-37xx-cpufreq.c b/drivers/cpufreq/armada-37xx-cpufreq.c
index f13646d143de..565c40f536ef 100644
--- a/drivers/cpufreq/armada-37xx-cpufreq.c
+++ b/drivers/cpufreq/armada-37xx-cpufreq.c@@ -85,6 +85,8 @@ static int avs_map[] = { }; struct armada37xx_cpufreq_state { + struct platform_device *pdev; + struct device *cpu_dev; struct regmap *regmap; u32 nb_l0l1; u32 nb_l2l3;
@@ -495,6 +497,9 @@ static int __init armada37xx_cpufreq_driver_init(void) if (ret) goto disable_dvfs; + armada37xx_cpufreq_state->cpu_dev = cpu_dev; + armada37xx_cpufreq_state->pdev = pdev; + platform_set_drvdata(pdev, dvfs); return 0; disable_dvfs:
@@ -513,6 +518,26 @@ static int __init armada37xx_cpufreq_driver_init(void) /* late_initcall, to guarantee the driver is loaded after A37xx clock driver */ late_initcall(armada37xx_cpufreq_driver_init); +static void __exit armada37xx_cpufreq_driver_exit(void) +{ + struct platform_device *pdev = armada37xx_cpufreq_state->pdev; + struct armada_37xx_dvfs *dvfs = platform_get_drvdata(pdev); + unsigned long freq; + int load_lvl; + + platform_device_unregister(pdev); + + armada37xx_cpufreq_disable_dvfs(armada37xx_cpufreq_state->regmap); + + for (load_lvl = ARMADA_37XX_DVFS_LOAD_0; load_lvl < LOAD_LEVEL_NR; load_lvl++) { + freq = dvfs->cpu_freq_max / dvfs->divider[load_lvl]; + dev_pm_opp_remove(armada37xx_cpufreq_state->cpu_dev, freq); + } + + kfree(armada37xx_cpufreq_state); +} +module_exit(armada37xx_cpufreq_driver_exit); + static const struct of_device_id __maybe_unused armada37xx_cpufreq_of_match[] = { { .compatible = "marvell,armada-3700-nb-pm" }, { },
--
2.20.1
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