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Date: Tue, 3 Aug 2021 23:08:20 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Eric Piel <eric.piel@...mplin-utc.net>,
Hans de Goede <hdegoede@...hat.com>,
Mark Gross <mgross@...ux.intel.com>
Subject: [RFT, PATCH v1 1/1] platform/x86: hp_accel: Convert to be a platform driver
ACPI core in conjunction with platform driver core provides
an infrastructure to enumerate ACPI devices. Use it in order
to remove a lot of boilerplate code.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
Not sure what buys us to run _INI on PM calls. It's against the spec AFAICT.
In any case ACPICA runs _INI as per specification when devices are
instantiated.
drivers/platform/x86/hp_accel.c | 74 +++++++--------------------------
1 file changed, 14 insertions(+), 60 deletions(-)
diff --git a/drivers/platform/x86/hp_accel.c b/drivers/platform/x86/hp_accel.c
index 8c0867bda828..69f86b761c7f 100644
--- a/drivers/platform/x86/hp_accel.c
+++ b/drivers/platform/x86/hp_accel.c
@@ -29,7 +29,6 @@
#include "../../misc/lis3lv02d/lis3lv02d.h"
#define DRIVER_NAME "hp_accel"
-#define ACPI_MDPS_CLASS "accelerometer"
/* Delayed LEDs infrastructure ------------------------------------ */
@@ -78,7 +77,6 @@ static const struct acpi_device_id lis3lv02d_device_ids[] = {
};
MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
-
/**
* lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
* @lis3: pointer to the device struct
@@ -87,14 +85,6 @@ MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
*/
static int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
{
- struct acpi_device *dev = lis3->bus_priv;
- if (!lis3->init_required)
- return 0;
-
- if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI,
- NULL, NULL) != AE_OK)
- return -EINVAL;
-
return 0;
}
@@ -278,30 +268,6 @@ static struct delayed_led_classdev hpled_led = {
.set_brightness = hpled_set,
};
-static acpi_status
-lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
-{
- if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
- struct acpi_resource_extended_irq *irq;
- u32 *device_irq = context;
-
- irq = &resource->data.extended_irq;
- *device_irq = irq->interrupts[0];
- }
-
- return AE_OK;
-}
-
-static void lis3lv02d_enum_resources(struct acpi_device *device)
-{
- acpi_status status;
-
- status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
- lis3lv02d_get_resource, &lis3_dev.irq);
- if (ACPI_FAILURE(status))
- printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
-}
-
static bool hp_accel_i8042_filter(unsigned char data, unsigned char str,
struct serio *port)
{
@@ -331,23 +297,19 @@ static bool hp_accel_i8042_filter(unsigned char data, unsigned char str,
return false;
}
-static int lis3lv02d_add(struct acpi_device *device)
+static int lis3lv02d_probe(struct platform_device *device)
{
int ret;
- if (!device)
- return -EINVAL;
-
- lis3_dev.bus_priv = device;
+ lis3_dev.bus_priv = ACPI_COMPANION(&device->dev);
lis3_dev.init = lis3lv02d_acpi_init;
lis3_dev.read = lis3lv02d_acpi_read;
lis3_dev.write = lis3lv02d_acpi_write;
- strcpy(acpi_device_name(device), DRIVER_NAME);
- strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
- device->driver_data = &lis3_dev;
/* obtain IRQ number of our device from ACPI */
- lis3lv02d_enum_resources(device);
+ ret = platform_get_irq_optional(device, 0);
+ if (ret > 0)
+ lis3_dev.irq = ret;
/* If possible use a "standard" axes order */
if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
@@ -359,7 +321,6 @@ static int lis3lv02d_add(struct acpi_device *device)
}
/* call the core layer do its init */
- lis3_dev.init_required = true;
ret = lis3lv02d_init_device(&lis3_dev);
if (ret)
return ret;
@@ -381,11 +342,8 @@ static int lis3lv02d_add(struct acpi_device *device)
return ret;
}
-static int lis3lv02d_remove(struct acpi_device *device)
+static int lis3lv02d_remove(struct platform_device *device)
{
- if (!device)
- return -EINVAL;
-
i8042_remove_filter(hp_accel_i8042_filter);
lis3lv02d_joystick_disable(&lis3_dev);
lis3lv02d_poweroff(&lis3_dev);
@@ -396,7 +354,6 @@ static int lis3lv02d_remove(struct acpi_device *device)
return lis3lv02d_remove_fs(&lis3_dev);
}
-
#ifdef CONFIG_PM_SLEEP
static int lis3lv02d_suspend(struct device *dev)
{
@@ -407,14 +364,12 @@ static int lis3lv02d_suspend(struct device *dev)
static int lis3lv02d_resume(struct device *dev)
{
- lis3_dev.init_required = false;
lis3lv02d_poweron(&lis3_dev);
return 0;
}
static int lis3lv02d_restore(struct device *dev)
{
- lis3_dev.init_required = true;
lis3lv02d_poweron(&lis3_dev);
return 0;
}
@@ -434,17 +389,16 @@ static const struct dev_pm_ops hp_accel_pm = {
#endif
/* For the HP MDPS aka 3D Driveguard */
-static struct acpi_driver lis3lv02d_driver = {
- .name = DRIVER_NAME,
- .class = ACPI_MDPS_CLASS,
- .ids = lis3lv02d_device_ids,
- .ops = {
- .add = lis3lv02d_add,
- .remove = lis3lv02d_remove,
+static struct platform_driver lis3lv02d_driver = {
+ .probe = lis3lv02d_probe,
+ .remove = lis3lv02d_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .pm = HP_ACCEL_PM,
+ .acpi_match_table = lis3lv02d_device_ids,
},
- .drv.pm = HP_ACCEL_PM,
};
-module_acpi_driver(lis3lv02d_driver);
+module_platform_driver(lis3lv02d_driver);
MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
--
2.30.2
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