[PATCH v9 02/22] platform/x86/dell: dell-pc: Create platform device

Mario Limonciello
2024-12-02T05:51:35Z

In order to have a device for the platform profile core to reference
create a platform device for dell-pc.

While doing this change the memory allocation for the thermal handler
to be device managed to follow the lifecycle of that device.

Reviewed-by: Armin Wolf <W_Armin@gmx.de>
Tested-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
v9:
* ERR_PTR() -> PTR_ERR()
v8:
* Use IS_ERR()/ERR_PTR()
---
drivers/platform/x86/dell/dell-pc.c | 34 ++++++++++++++++++++---------
1 file changed, 24 insertions(+), 10 deletions(-)

diff --git a/drivers/platform/x86/dell/dell-pc.c b/drivers/platform/x86/dell/dell-pc.c
index 3cf79e55e3129..c0dbbd3b23065 100644
--- a/drivers/platform/x86/dell/dell-pc.c
+++ b/drivers/platform/x86/dell/dell-pc.c
@@ -18,10 +18,13 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_profile.h>
+#include <linux/platform_device.h>
#include <linux/slab.h>

#include "dell-smbios.h"

+static struct platform_device *platform_device;
+
static const struct dmi_system_id dell_device_table[] __initconst = {
{
.ident = "Dell Inc.",
@@ -244,9 +247,15 @@ static int thermal_init(void)
if (!supported_modes)
return 0;

- thermal_handler = kzalloc(sizeof(*thermal_handler), GFP_KERNEL);
- if (!thermal_handler)
- return -ENOMEM;
+ platform_device = platform_device_register_simple("dell-pc", PLATFORM_DEVID_NONE, NULL, 0);
+ if (IS_ERR(platform_device))
+ return PTR_ERR(platform_device);
+
+ thermal_handler = devm_kzalloc(&platform_device->dev, sizeof(*thermal_handler), GFP_KERNEL);
+ if (!thermal_handler) {
+ ret = -ENOMEM;
+ goto cleanup_platform_device;
+ }
thermal_handler->name = "dell-pc";
thermal_handler->profile_get = thermal_platform_profile_get;
thermal_handler->profile_set = thermal_platform_profile_set;
@@ -262,20 +271,25 @@ static int thermal_init(void)

/* Clean up if failed */
ret = platform_profile_register(thermal_handler);
- if (ret) {
- kfree(thermal_handler);
- thermal_handler = NULL;
- }
+ if (ret)
+ goto cleanup_thermal_handler;
+
+ return 0;
+
+cleanup_thermal_handler:
+ thermal_handler = NULL;
+
+cleanup_platform_device:
+ platform_device_unregister(platform_device);

return ret;
}

static void thermal_cleanup(void)
{
- if (thermal_handler) {
+ if (thermal_handler)
platform_profile_remove();
- kfree(thermal_handler);
- }
+ platform_device_unregister(platform_device);
}

static int __init dell_init(void)
--
2.43.0