tmakin/ack-tegra
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

cpufreq: tegra124: Allow building as a module

Browse Source 
This requires four changes:
* Using the cpufreq-dt register helper to establish a hard dependency
  for depmod to track
* Adding a remove routine to remove the cpufreq-dt device
* Adding a exit routine to handle cleaning up the driver
* Populate module license

Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
This commit is contained in:
Aaron Kling
2025-04-01 19:47:25 -05:00
committed by Thomas Makin
parent 939d7a1bbd
commit 666dc7bf47
2 changed files with 35 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/cpufreq/Kconfig.arm
View File

@@ -229,7 +229,7 @@ config ARM_TEGRA20_CPUFREQ
This adds the CPUFreq driver support for Tegra20/30 SOCs.
config ARM_TEGRA124_CPUFREQ
bool "Tegra124 CPUFreq support"
tristate "Tegra124 CPUFreq support"
depends on ARCH_TEGRA || COMPILE_TEST
depends on CPUFREQ_DT
default y

44
drivers/cpufreq/tegra124-cpufreq.c
View File

@@ -16,6 +16,10 @@
#include <linux/pm_opp.h>
#include <linux/types.h>
#include "cpufreq-dt.h"
static struct platform_device *tegra124_cpufreq_pdev;
struct tegra124_cpufreq_priv {
struct clk *cpu_clk;
struct clk *pllp_clk;
@@ -55,7 +59,6 @@ static int tegra124_cpufreq_probe(struct platform_device *pdev)
struct device_node *np __free(device_node) = of_cpu_device_node_get(0);
struct tegra124_cpufreq_priv *priv;
struct device *cpu_dev;
struct platform_device_info cpufreq_dt_devinfo = {};
int ret;
if (!np)
@@ -95,11 +98,7 @@ static int tegra124_cpufreq_probe(struct platform_device *pdev)
if (ret)
goto out_put_pllp_clk;
cpufreq_dt_devinfo.name = "cpufreq-dt";
cpufreq_dt_devinfo.parent = &pdev->dev;
priv->cpufreq_dt_pdev =
platform_device_register_full(&cpufreq_dt_devinfo);
priv->cpufreq_dt_pdev = cpufreq_dt_pdev_register(&pdev->dev);
if (IS_ERR(priv->cpufreq_dt_pdev)) {
ret = PTR_ERR(priv->cpufreq_dt_pdev);
goto out_put_pllp_clk;
@@ -173,6 +172,21 @@ disable_cpufreq:
return err;
}
static void tegra124_cpufreq_remove(struct platform_device *pdev)
{
struct tegra124_cpufreq_priv *priv = dev_get_drvdata(&pdev->dev);
if (!IS_ERR(priv->cpufreq_dt_pdev)) {
platform_device_unregister(priv->cpufreq_dt_pdev);
priv->cpufreq_dt_pdev = ERR_PTR(-ENODEV);
}
clk_put(priv->pllp_clk);
clk_put(priv->pllx_clk);
clk_put(priv->dfll_clk);
clk_put(priv->cpu_clk);
}
static const struct dev_pm_ops tegra124_cpufreq_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(tegra124_cpufreq_suspend,
tegra124_cpufreq_resume)
@@ -182,12 +196,12 @@ static struct platform_driver tegra124_cpufreq_platdrv = {
.driver.name = "cpufreq-tegra124",
.driver.pm = &tegra124_cpufreq_pm_ops,
.probe = tegra124_cpufreq_probe,
.remove = tegra124_cpufreq_remove,
};
static int __init tegra_cpufreq_init(void)
{
int ret;
struct platform_device *pdev;
if (!(of_machine_is_compatible("nvidia,tegra124") ||
of_machine_is_compatible("nvidia,tegra210")))
@@ -201,15 +215,25 @@ static int __init tegra_cpufreq_init(void)
if (ret)
return ret;
pdev = platform_device_register_simple("cpufreq-tegra124", -1, NULL, 0);
if (IS_ERR(pdev)) {
tegra124_cpufreq_pdev = platform_device_register_simple("cpufreq-tegra124", -1, NULL, 0);
if (IS_ERR(tegra124_cpufreq_pdev)) {
platform_driver_unregister(&tegra124_cpufreq_platdrv);
return PTR_ERR(pdev);
return PTR_ERR(tegra124_cpufreq_pdev);
}
return 0;
}
module_init(tegra_cpufreq_init);
static void __exit tegra_cpufreq_module_exit(void)
{
if (!IS_ERR_OR_NULL(tegra124_cpufreq_pdev))
platform_device_unregister(tegra124_cpufreq_pdev);
platform_driver_unregister(&tegra124_cpufreq_platdrv);
}
module_exit(tegra_cpufreq_module_exit);
MODULE_AUTHOR("Tuomas Tynkkynen <ttynkkynen@nvidia.com>");
MODULE_DESCRIPTION("cpufreq driver for NVIDIA Tegra124");
MODULE_LICENSE("GPL");