[PATCH v2] cpufreq: kryo: Add module remove and exit

[ilia . lin]

From: Ilia Lin <ilia....@gmail.com>

Add device remove and module exit code to make the driver
functioning as a loadable module.

Fixes: ac28927659be (cpufreq: kryo: allow building as a loadable module)
Signed-off-by: Ilia Lin <ilia....@gmail.com>
---
 drivers/cpufreq/qcom-cpufreq-kryo.c | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/drivers/cpufreq/qcom-cpufreq-kryo.c 
b/drivers/cpufreq/qcom-cpufreq-kryo.c
index 5e9511223ce9..01bddacf5c3b 100644
--- a/drivers/cpufreq/qcom-cpufreq-kryo.c
+++ b/drivers/cpufreq/qcom-cpufreq-kryo.c
@@ -42,6 +42,8 @@ enum _msm8996_version {
        NUM_OF_MSM8996_VERSIONS,
 };
 
+struct platform_device *cpufreq_dt_pdev, *kryo_cpufreq_pdev;
+
 static enum _msm8996_version __init qcom_cpufreq_kryo_get_msm_id(void)
 {
        size_t len;
@@ -74,7 +76,6 @@ static enum _msm8996_version __init 
qcom_cpufreq_kryo_get_msm_id(void)
 static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
 {
        struct opp_table *opp_tables[NR_CPUS] = {0};
-       struct platform_device *cpufreq_dt_pdev;
        enum _msm8996_version msm8996_version;
        struct nvmem_cell *speedbin_nvmem;
        struct device_node *np;
@@ -129,6 +130,7 @@ static int qcom_cpufreq_kryo_probe(struct platform_device 
*pdev)
                BUG();
                break;
        }
+       kfree(speedbin);
 
        for_each_possible_cpu(cpu) {
                cpu_dev = get_cpu_device(cpu);
@@ -164,8 +166,15 @@ static int qcom_cpufreq_kryo_probe(struct platform_device 
*pdev)
        return ret;
 }
 
+static int qcom_cpufreq_kryo_remove(struct platform_device *pdev)
+{
+       platform_device_unregister(cpufreq_dt_pdev);
+       return 0;
+}
+
 static struct platform_driver qcom_cpufreq_kryo_driver = {
        .probe = qcom_cpufreq_kryo_probe,
+       .remove = qcom_cpufreq_kryo_remove,
        .driver = {
                .name = "qcom-cpufreq-kryo",
        },
@@ -200,8 +209,9 @@ static int __init qcom_cpufreq_kryo_init(void)
        if (unlikely(ret < 0))
                return ret;
 
-       ret = PTR_ERR_OR_ZERO(platform_device_register_simple(
-               "qcom-cpufreq-kryo", -1, NULL, 0));
+       kryo_cpufreq_pdev = platform_device_register_simple(
+               "qcom-cpufreq-kryo", -1, NULL, 0);
+       ret = PTR_ERR_OR_ZERO(kryo_cpufreq_pdev);
        if (0 == ret)
                return 0;
 
@@ -210,5 +220,12 @@ static int __init qcom_cpufreq_kryo_init(void)
 }
 module_init(qcom_cpufreq_kryo_init);
 
+static void __init qcom_cpufreq_kryo_exit(void)
+{
+       platform_device_unregister(kryo_cpufreq_pdev);
+       platform_driver_unregister(&qcom_cpufreq_kryo_driver);
+}
+module_exit(qcom_cpufreq_kryo_exit);
+
 MODULE_DESCRIPTION("Qualcomm Technologies, Inc. Kryo CPUfreq driver");
 MODULE_LICENSE("GPL v2");
-- 
2.11.0