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Subject[PATCH mvebu v2 10/10] cpufreq: armada-37xx: Fix module unloading
Date
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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