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platform/x86: eeepc-laptop: Convert ACPI driver to a platform one

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In all cases in which a struct acpi_driver is used for binding a driver
to an ACPI device object, a corresponding platform device is created by
the ACPI core and that device is regarded as a proper representation of
underlying hardware.  Accordingly, a struct platform_driver should be
used by driver code to bind to that device.  There are multiple reasons
why drivers should not bind directly to ACPI device objects [1].

Overall, it is better to bind drivers to platform devices than to their
ACPI companions, so convert the EEEPC laptop ACPI driver to a platform
one.

While this is not expected to alter functionality, it changes sysfs
layout and so it will be visible to user space.

Link: https://lore.kernel.org/all/2396510.ElGaqSPkdT@rafael.j.wysocki/ [1]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Denis Benato <denis.benato@linux.dev>
Link: https://patch.msgid.link/3329436.5fSG56mABF@rafael.j.wysocki
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Rafael J. Wysocki 2026-02-28 16:22:54 +01:00 committed by Ilpo Järvinen
parent 5eea33b4d3
commit 079b59fd2d
No known key found for this signature in database
GPG Key ID: 59AC4F6153E5CE31
1 changed files with 17 additions and 15 deletions
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32
drivers/platform/x86/eeepc-laptop.c
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@ -1361,8 +1361,9 @@ static void eeepc_enable_camera(struct eeepc_laptop *eeepc)
static bool eeepc_device_present; static bool eeepc_device_present;
static int eeepc_acpi_add(struct acpi_device *device) static int eeepc_acpi_probe(struct platform_device *pdev)
{ {
struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
struct eeepc_laptop *eeepc; struct eeepc_laptop *eeepc;
int result; int result;
@ -1373,9 +1374,10 @@ static int eeepc_acpi_add(struct acpi_device *device)
eeepc->handle = device->handle; eeepc->handle = device->handle;
strscpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME); strscpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
strscpy(acpi_device_class(device), EEEPC_ACPI_CLASS); strscpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
device->driver_data = eeepc;
eeepc->device = device; eeepc->device = device;
platform_set_drvdata(pdev, eeepc);
eeepc->hotplug_disabled = hotplug_disabled; eeepc->hotplug_disabled = hotplug_disabled;
eeepc_dmi_check(eeepc); eeepc_dmi_check(eeepc);
@ -1448,11 +1450,12 @@ static int eeepc_acpi_add(struct acpi_device *device)
return result; return result;
} }
static void eeepc_acpi_remove(struct acpi_device *device) static void eeepc_acpi_remove(struct platform_device *pdev)
{ {
struct eeepc_laptop *eeepc = acpi_driver_data(device); struct eeepc_laptop *eeepc = platform_get_drvdata(pdev);
acpi_dev_remove_notify_handler(device, ACPI_ALL_NOTIFY, eeepc_acpi_notify); acpi_dev_remove_notify_handler(ACPI_COMPANION(&pdev->dev),
ACPI_ALL_NOTIFY, eeepc_acpi_notify);
eeepc_backlight_exit(eeepc); eeepc_backlight_exit(eeepc);
eeepc_rfkill_exit(eeepc); eeepc_rfkill_exit(eeepc);
eeepc_input_exit(eeepc); eeepc_input_exit(eeepc);
@ -1469,13 +1472,12 @@ static const struct acpi_device_id eeepc_device_ids[] = {
}; };
MODULE_DEVICE_TABLE(acpi, eeepc_device_ids); MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
static struct acpi_driver eeepc_acpi_driver = { static struct platform_driver eeepc_acpi_driver = {
.name = EEEPC_LAPTOP_NAME, .probe = eeepc_acpi_probe,
.class = EEEPC_ACPI_CLASS, .remove = eeepc_acpi_remove,
.ids = eeepc_device_ids, .driver = {
.ops = { .name = EEEPC_LAPTOP_NAME,
.add = eeepc_acpi_add, .acpi_match_table = eeepc_device_ids,
.remove = eeepc_acpi_remove,
}, },
}; };
@ -1488,7 +1490,7 @@ static int __init eeepc_laptop_init(void)
if (result < 0) if (result < 0)
return result; return result;
result = acpi_bus_register_driver(&eeepc_acpi_driver); result = platform_driver_register(&eeepc_acpi_driver);
if (result < 0) if (result < 0)
goto fail_acpi_driver; goto fail_acpi_driver;
@ -1500,7 +1502,7 @@ static int __init eeepc_laptop_init(void)
return 0; return 0;
fail_no_device: fail_no_device:
acpi_bus_unregister_driver(&eeepc_acpi_driver); platform_driver_unregister(&eeepc_acpi_driver);
fail_acpi_driver: fail_acpi_driver:
platform_driver_unregister(&platform_driver); platform_driver_unregister(&platform_driver);
return result; return result;
@ -1508,7 +1510,7 @@ static int __init eeepc_laptop_init(void)
static void __exit eeepc_laptop_exit(void) static void __exit eeepc_laptop_exit(void)
{ {
acpi_bus_unregister_driver(&eeepc_acpi_driver); platform_driver_unregister(&eeepc_acpi_driver);
platform_driver_unregister(&platform_driver); platform_driver_unregister(&platform_driver);
} }