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Subject[PATCH 1/3] ideapad: add platform driver for ideapad
Date
Create /sys/devices/platform/Ideapad for nodes of ideapad landing.

Signed-off-by: Ike Panhc <ike.pan@canonical.com>
---
drivers/platform/x86/ideapad-laptop.c | 59 ++++++++++++++++++++++++++------
1 files changed, 48 insertions(+), 11 deletions(-)
diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
index 5ff1220..26edbdb 100644
--- a/drivers/platform/x86/ideapad-laptop.c
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -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 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;
@@ -374,16 +414,13 @@ static struct acpi_driver ideapad_acpi_driver = {

static int __init ideapad_acpi_module_init(void)
{
- acpi_bus_register_driver(&ideapad_acpi_driver);
-
- return 0;
+ return acpi_bus_register_driver(&ideapad_acpi_driver);
}


static void __exit ideapad_acpi_module_exit(void)
{
acpi_bus_unregister_driver(&ideapad_acpi_driver);
-
}

MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
--
1.7.1


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