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Message-ID: <20231006173055.2938160-4-michal.wilczynski@intel.com>
Date: Fri, 6 Oct 2023 20:30:52 +0300
From: Michal Wilczynski <michal.wilczynski@...el.com>
To: linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
nvdimm@...ts.linux.dev
Cc: rafael.j.wysocki@...el.com, andriy.shevchenko@...el.com,
lenb@...nel.org, dan.j.williams@...el.com,
vishal.l.verma@...el.com, ira.weiny@...el.com,
Michal Wilczynski <michal.wilczynski@...el.com>
Subject: [PATCH v2 3/6] ACPI: AC: Replace acpi_driver with platform_driver
AC driver uses struct acpi_driver incorrectly to register itself. This
is wrong as the instances of the ACPI devices are not meant to
be literal devices, they're supposed to describe ACPI entry of a
particular device.
Use platform_driver instead of acpi_driver. In relevant places call
platform devices instances pdev to make a distinction with ACPI
devices instances.
Drop unnecessary casts from acpi_bus_generate_netlink_event() and
acpi_notifier_call_chain().
Add a blank line to distinguish pdev API vs local ACPI notify function.
Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Michal Wilczynski <michal.wilczynski@...el.com>
---
drivers/acpi/ac.c | 70 +++++++++++++++++++++++++----------------------
1 file changed, 37 insertions(+), 33 deletions(-)
diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index f809f6889b4a..298defeb5301 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -33,8 +33,9 @@ MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION("ACPI AC Adapter Driver");
MODULE_LICENSE("GPL");
-static int acpi_ac_add(struct acpi_device *device);
-static void acpi_ac_remove(struct acpi_device *device);
+static int acpi_ac_probe(struct platform_device *pdev);
+static void acpi_ac_remove(struct platform_device *pdev);
+
static void acpi_ac_notify(acpi_handle handle, u32 event, void *data);
static const struct acpi_device_id ac_device_ids[] = {
@@ -51,21 +52,10 @@ static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
static int ac_sleep_before_get_state_ms;
static int ac_only;
-static struct acpi_driver acpi_ac_driver = {
- .name = "ac",
- .class = ACPI_AC_CLASS,
- .ids = ac_device_ids,
- .ops = {
- .add = acpi_ac_add,
- .remove = acpi_ac_remove,
- },
- .drv.pm = &acpi_ac_pm,
-};
-
struct acpi_ac {
struct power_supply *charger;
struct power_supply_desc charger_desc;
- struct acpi_device *device;
+ struct device *dev;
unsigned long long state;
struct notifier_block battery_nb;
};
@@ -85,10 +75,10 @@ static int acpi_ac_get_state(struct acpi_ac *ac)
return 0;
}
- status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
+ status = acpi_evaluate_integer(ACPI_HANDLE(ac->dev), "_PSR", NULL,
&ac->state);
if (ACPI_FAILURE(status)) {
- acpi_handle_info(ac->device->handle,
+ acpi_handle_info(ACPI_HANDLE(ac->dev),
"Error reading AC Adapter state: %s\n",
acpi_format_exception(status));
ac->state = ACPI_AC_STATUS_UNKNOWN;
@@ -129,12 +119,12 @@ static enum power_supply_property ac_props[] = {
/* Driver Model */
static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
{
- struct acpi_device *device = data;
- struct acpi_ac *ac = acpi_driver_data(device);
+ struct acpi_ac *ac = data;
+ struct acpi_device *device = ACPI_COMPANION(ac->dev);
switch (event) {
default:
- acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n",
+ acpi_handle_debug(ACPI_HANDLE(ac->dev), "Unsupported event [0x%x]\n",
event);
fallthrough;
case ACPI_AC_NOTIFY_STATUS:
@@ -152,9 +142,10 @@ static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
acpi_ac_get_state(ac);
acpi_bus_generate_netlink_event(device->pnp.device_class,
- dev_name(&device->dev), event,
- (u32) ac->state);
- acpi_notifier_call_chain(device, event, (u32) ac->state);
+ dev_name(ac->dev),
+ event,
+ ac->state);
+ acpi_notifier_call_chain(device, event, ac->state);
kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
}
}
@@ -211,8 +202,9 @@ static const struct dmi_system_id ac_dmi_table[] __initconst = {
{},
};
-static int acpi_ac_add(struct acpi_device *device)
+static int acpi_ac_probe(struct platform_device *pdev)
{
+ struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
struct power_supply_config psy_cfg = {};
struct acpi_ac *ac;
int result;
@@ -221,10 +213,11 @@ static int acpi_ac_add(struct acpi_device *device)
if (!ac)
return -ENOMEM;
- ac->device = device;
+ ac->dev = &pdev->dev;
strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_AC_CLASS);
- device->driver_data = ac;
+
+ platform_set_drvdata(pdev, ac);
result = acpi_ac_get_state(ac);
if (result)
@@ -237,7 +230,7 @@ static int acpi_ac_add(struct acpi_device *device)
ac->charger_desc.properties = ac_props;
ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
ac->charger_desc.get_property = get_ac_property;
- ac->charger = power_supply_register(&ac->device->dev,
+ ac->charger = power_supply_register(&pdev->dev,
&ac->charger_desc, &psy_cfg);
if (IS_ERR(ac->charger)) {
result = PTR_ERR(ac->charger);
@@ -251,7 +244,7 @@ static int acpi_ac_add(struct acpi_device *device)
register_acpi_notifier(&ac->battery_nb);
result = acpi_dev_install_notify_handler(device, ACPI_ALL_NOTIFY,
- acpi_ac_notify, device);
+ acpi_ac_notify, ac);
if (result)
goto err_unregister;
@@ -269,7 +262,7 @@ static int acpi_ac_add(struct acpi_device *device)
#ifdef CONFIG_PM_SLEEP
static int acpi_ac_resume(struct device *dev)
{
- struct acpi_ac *ac = acpi_driver_data(to_acpi_device(dev));
+ struct acpi_ac *ac = dev_get_drvdata(dev);
unsigned int old_state;
old_state = ac->state;
@@ -284,11 +277,12 @@ static int acpi_ac_resume(struct device *dev)
#define acpi_ac_resume NULL
#endif
-static void acpi_ac_remove(struct acpi_device *device)
+static void acpi_ac_remove(struct platform_device *pdev)
{
- struct acpi_ac *ac = acpi_driver_data(device);
+ struct acpi_ac *ac = platform_get_drvdata(pdev);
- acpi_dev_remove_notify_handler(device, ACPI_ALL_NOTIFY,
+ acpi_dev_remove_notify_handler(ACPI_COMPANION(ac->dev),
+ ACPI_ALL_NOTIFY,
acpi_ac_notify);
power_supply_unregister(ac->charger);
unregister_acpi_notifier(&ac->battery_nb);
@@ -296,6 +290,16 @@ static void acpi_ac_remove(struct acpi_device *device)
kfree(ac);
}
+static struct platform_driver acpi_ac_driver = {
+ .probe = acpi_ac_probe,
+ .remove_new = acpi_ac_remove,
+ .driver = {
+ .name = "ac",
+ .acpi_match_table = ac_device_ids,
+ .pm = &acpi_ac_pm,
+ },
+};
+
static int __init acpi_ac_init(void)
{
int result;
@@ -308,7 +312,7 @@ static int __init acpi_ac_init(void)
dmi_check_system(ac_dmi_table);
- result = acpi_bus_register_driver(&acpi_ac_driver);
+ result = platform_driver_register(&acpi_ac_driver);
if (result < 0)
return -ENODEV;
@@ -317,7 +321,7 @@ static int __init acpi_ac_init(void)
static void __exit acpi_ac_exit(void)
{
- acpi_bus_unregister_driver(&acpi_ac_driver);
+ platform_driver_unregister(&acpi_ac_driver);
}
module_init(acpi_ac_init);
module_exit(acpi_ac_exit);
--
2.41.0
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