ideapad: define cfg bits and create sysfs node for cfg

Create /sys/devices/platform/ideapad/cfg for showing cfg value.

Signed-off-by: Ike Panhc <ike.pan@canonical.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
(cherry picked from mainline commit 3371f48167e04017125dd08cc1f70fa93d2f2e17)
Signed-off-by: Leann Ogasawara <leann.ogasawara@canonical.com>

1 files changed, 35 insertions, 16 deletions

diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
index bfdda33feb2..42b9ba7e903 100644
--- a/drivers/platform/x86/ideapad-laptop.c
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -35,10 +35,15 @@
 
 #define IDEAPAD_RFKILL_DEV_NUM  (3)
 
+#define CFG_BT_BIT      (16)
+#define CFG_3G_BIT      (17)
+#define CFG_WIFI_BIT    (18)
+
 struct ideapad_private {
         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
         struct platform_device *platform_device;
         struct input_dev *inputdev;
+        unsigned long cfg;
 };
 
 static acpi_handle ideapad_handle;
@@ -155,7 +160,7 @@ static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
 }
 
 /*
- * camera power
+ * sysfs
  */
 static ssize_t show_ideapad_cam(struct device *dev,
                                 struct device_attribute *attr,
@@ -186,6 +191,27 @@ static ssize_t store_ideapad_cam(struct device *dev,
 
 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
 
+static ssize_t show_ideapad_cfg(struct device *dev,
+                                struct device_attribute *attr,
+                                char *buf)
+{
+        struct ideapad_private *priv = dev_get_drvdata(dev);
+
+        return sprintf(buf, "0x%.8lX\n", priv->cfg);
+}
+
+static DEVICE_ATTR(cfg, 0444, show_ideapad_cfg, NULL);
+
+static struct attribute *ideapad_attributes[] = {
+        &dev_attr_camera_power.attr,
+        &dev_attr_cfg.attr,
+        NULL
+};
+
+static struct attribute_group ideapad_attribute_group = {
+        .attrs = ideapad_attributes
+};
+
 /*
  * Rfkill
  */
@@ -197,9 +223,9 @@ struct ideapad_rfk_data {
 };
 
 const struct ideapad_rfk_data ideapad_rfk_data[] = {
-        { "ideapad_wlan",       18, 0x15, RFKILL_TYPE_WLAN },
-        { "ideapad_bluetooth",  16, 0x17, RFKILL_TYPE_BLUETOOTH },
-        { "ideapad_3g",         17, 0x20, RFKILL_TYPE_WWAN },
+        { "ideapad_wlan",      CFG_WIFI_BIT, 0x15, RFKILL_TYPE_WLAN },
+        { "ideapad_bluetooth", CFG_BT_BIT,   0x17, RFKILL_TYPE_BLUETOOTH },
+        { "ideapad_3g",        CFG_3G_BIT,   0x20, RFKILL_TYPE_WWAN },
 };
 
 static int ideapad_rfk_set(void *data, bool blocked)
@@ -280,15 +306,6 @@ static void __devexit ideapad_unregister_rfkill(struct acpi_device *adevice,
 /*
  * Platform device
  */
-static struct attribute *ideapad_attributes[] = {
-        &dev_attr_camera_power.attr,
-        NULL
-};
-
-static struct attribute_group ideapad_attribute_group = {
-        .attrs = ideapad_attributes
-};
-
 static int __devinit ideapad_platform_init(struct ideapad_private *priv)
 {
         int result;
@@ -393,10 +410,11 @@ MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
 
 static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
 {
-        int ret, i, cfg;
+        int ret, i;
+        unsigned long cfg;
         struct ideapad_private *priv;
 
-        if (read_method_int(adevice->handle, "_CFG", &cfg))
+        if (read_method_int(adevice->handle, "_CFG", (int *)&cfg))
                 return -ENODEV;
 
         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
@@ -404,6 +422,7 @@ static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
                 return -ENOMEM;
         dev_set_drvdata(&adevice->dev, priv);
         ideapad_handle = adevice->handle;
+        priv->cfg = cfg;
 
         ret = ideapad_platform_init(priv);
         if (ret)
@@ -414,7 +433,7 @@ static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
                 goto input_failed;
 
         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
-                if (test_bit(ideapad_rfk_data[i].cfgbit, (unsigned long *)&cfg))
+                if (test_bit(ideapad_rfk_data[i].cfgbit, &cfg))
                         ideapad_register_rfkill(adevice, i);
                 else
                         priv->rfk[i] = NULL;