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ideapad: add platform driver for ideapad

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Create /sys/devices/platform/ideapad for nodes of ideapad landing.

Signed-off-by: Ike Panhc <ike.pan@canonical.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Ike Panhc 2010-12-13 18:00:15 +08:00 committed by Matthew Garrett
parent 9c23225006
commit 98ee69191d
1 changed files with 47 additions and 7 deletions
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54
drivers/platform/x86/ideapad-laptop.c
View file

@ -27,6 +27,7 @@
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <linux/rfkill.h>
#include <linux/platform_device.h>
#define IDEAPAD_DEV_CAMERA 0
#define IDEAPAD_DEV_WLAN 1
@ -37,6 +38,7 @@
struct ideapad_private {
acpi_handle handle;
struct rfkill *rfk[5];
struct platform_device *platform_device;
} *ideapad_priv;
static struct {
@ -277,6 +279,35 @@ static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
rfkill_destroy(priv->rfk[dev]);
}
/*
* Platform device
*/
static int __devinit ideapad_platform_init(void)
{
int result;
ideapad_priv->platform_device = platform_device_alloc("ideapad", -1);
if (!ideapad_priv->platform_device)
return -ENOMEM;
platform_set_drvdata(ideapad_priv->platform_device, ideapad_priv);
result = platform_device_add(ideapad_priv->platform_device);
if (result)
goto fail_platform_device;
return 0;
fail_platform_device:
platform_device_put(ideapad_priv->platform_device);
return result;
}
static void ideapad_platform_exit(void)
{
platform_device_unregister(ideapad_priv->platform_device);
}
/* the above is platform device */
static const struct acpi_device_id ideapad_device_ids[] = {
{ "VPC2004", 0},
{ "", 0},
@ -285,7 +316,7 @@ MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
static int ideapad_acpi_add(struct acpi_device *adevice)
{
int i, cfg;
int ret, i, cfg;
int devs_present[5];
struct ideapad_private *priv;
@ -305,18 +336,20 @@ static int ideapad_acpi_add(struct acpi_device *adevice)
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
ideapad_priv = priv;
ret = ideapad_platform_init();
if (ret)
goto platform_failed;
if (devs_present[IDEAPAD_DEV_CAMERA]) {
int ret = device_create_file(&adevice->dev, &dev_attr_camera_power);
if (ret) {
kfree(priv);
return ret;
}
ret = device_create_file(&adevice->dev, &dev_attr_camera_power);
if (ret)
goto camera_failed;
}
priv->handle = adevice->handle;
dev_set_drvdata(&adevice->dev, priv);
ideapad_priv = priv;
for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++) {
if (!devs_present[i])
continue;
@ -325,6 +358,12 @@ static int ideapad_acpi_add(struct acpi_device *adevice)
}
ideapad_sync_rfk_state(adevice);
return 0;
camera_failed:
ideapad_platform_exit();
platform_failed:
kfree(priv);
return ret;
}
static int ideapad_acpi_remove(struct acpi_device *adevice, int type)
@ -337,6 +376,7 @@ static int ideapad_acpi_remove(struct acpi_device *adevice, int type)
for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++)
ideapad_unregister_rfkill(adevice, i);
ideapad_platform_exit();
dev_set_drvdata(&adevice->dev, NULL);
kfree(priv);
return 0;