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Date: Thu, 2 Jun 2011 17:24:05 +0800
From: Ike Panhc <ike.pan@...onical.com>
To: platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-doc@...r.kernel.org
Cc: Matthew Garrett <mjg@...hat.com>,
Randy Dunlap <rdunlap@...otime.net>
Subject: [PATCH 2/3] ideapad: Add nodes in sysfs
Create the following nodes in sysfs
/sys/devices/platform/ideapad/brightness
/sys/devices/platform/ideapad/touchpad
/sys/devices/platform/ideapad/cfg
/sys/devices/platform/ideapad/backlight
Signed-off-by: Ike Panhc <ike.pan@...onical.com>
---
.../ABI/testing/sysfs-platform-ideapad-laptop | 30 +++++
drivers/platform/x86/ideapad-laptop.c | 128 +++++++++++++++++---
2 files changed, 140 insertions(+), 18 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-platform-ideapad-laptop b/Documentation/ABI/testing/sysfs-platform-ideapad-laptop
index 807fca2..869f0c4 100644
--- a/Documentation/ABI/testing/sysfs-platform-ideapad-laptop
+++ b/Documentation/ABI/testing/sysfs-platform-ideapad-laptop
@@ -4,3 +4,33 @@ KernelVersion: 2.6.37
Contact: "Ike Panhc <ike.pan@...onical.com>"
Description:
Control the power of camera module. 1 means on, 0 means off.
+
+What: /sys/devices/platform/ideapad/brightness
+Date: Jun 2011
+KernelVersion: 3.0.1
+Contact: "Ike Panhc <ike.pan@...onical.com>"
+Description:
+ Brightness control. When reading, it shows <current>/<max>.
+ When writing, it accepts new brightness value.
+
+What: /sys/devices/platform/ideapad/touchpad
+Date: Jun 2011
+KernelVersion: 3.0.1
+Contact: "Ike Panhc <ike.pan@...onical.com>"
+Description:
+ Control the power of touchpad. 1 means on, 0 means off.
+
+What: /sys/devices/platform/ideapad/cfg
+Date: Jun 2011
+KernelVersion: 3.0.1
+Contact: "Ike Panhc <ike.pan@...onical.com>"
+Description:
+ Ideapad capability bits.
+
+What: /sys/devices/platform/ideapad/backlight
+Date: Jun 2011
+KernelVersion: 3.0.1
+Contact: "Ike Panhc <ike.pan@...onical.com>"
+Description:
+ Control the power of backlight. 1 means on, 0 means off.
+
diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
index a5c0efa..9c09891 100644
--- a/drivers/platform/x86/ideapad-laptop.c
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -160,22 +160,25 @@ static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
}
/*
- * camera power
+ * sysfs helper
*/
-static ssize_t show_ideapad_cam(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t show_ideapad_helper(struct device *dev,
+ struct device_attribute *attr,
+ char *buf,
+ int cmd)
{
unsigned long result;
- if (read_ec_data(ideapad_handle, 0x1D, &result))
+ if (read_ec_data(ideapad_handle, cmd, &result))
return sprintf(buf, "-1\n");
return sprintf(buf, "%lu\n", result);
}
-static ssize_t store_ideapad_cam(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
+static ssize_t store_ideapad_helper(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count,
+ int cmd)
{
int ret, state;
@@ -183,14 +186,112 @@ static ssize_t store_ideapad_cam(struct device *dev,
return 0;
if (sscanf(buf, "%i", &state) != 1)
return -EINVAL;
- ret = write_ec_cmd(ideapad_handle, 0x1E, state);
+ ret = write_ec_cmd(ideapad_handle, cmd, state);
if (ret < 0)
return ret;
return count;
}
+/*
+ * sysfs node
+ */
+static ssize_t show_ideapad_cam(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return show_ideapad_helper(dev, attr, buf, 0x1D);
+}
+
+static ssize_t store_ideapad_cam(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ return store_ideapad_helper(dev, attr, buf, count, 0x1E);
+}
+
static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
+static ssize_t show_ideapad_touchpad(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return show_ideapad_helper(dev, attr, buf, 0x1B);
+}
+
+static ssize_t store_ideapad_touchpad(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ return store_ideapad_helper(dev, attr, buf, count, 0x1C);
+}
+
+static DEVICE_ATTR(touchpad, 0644, show_ideapad_touchpad,
+ store_ideapad_touchpad);
+
+static ssize_t show_ideapad_brightness(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ unsigned long now, max;
+
+ if (read_ec_data(ideapad_handle, 0x11, &max))
+ max = -1;
+ if (read_ec_data(ideapad_handle, 0x12, &now))
+ now = -1;
+ return sprintf(buf, "%lu/%lu\n", now, max);
+}
+
+static ssize_t store_ideapad_brightness(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ return store_ideapad_helper(dev, attr, buf, count, 0x13);
+}
+
+static DEVICE_ATTR(brightness, 0644, show_ideapad_brightness,
+ store_ideapad_brightness);
+
+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%.8X\n", (unsigned int)(priv->cfg));
+}
+
+static DEVICE_ATTR(cfg, 0444, show_ideapad_cfg, NULL);
+
+static ssize_t show_ideapad_backlight(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return show_ideapad_helper(dev, attr, buf, 0x18);
+}
+
+static ssize_t store_ideapad_backlight(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ return store_ideapad_helper(dev, attr, buf, count, 0x33);
+}
+
+static DEVICE_ATTR(backlight, 0644, show_ideapad_backlight,
+ store_ideapad_backlight);
+
+static struct attribute *ideapad_attributes[] = {
+ &dev_attr_camera_power.attr,
+ &dev_attr_brightness.attr,
+ &dev_attr_touchpad.attr,
+ &dev_attr_cfg.attr,
+ &dev_attr_backlight.attr,
+ NULL
+};
+
+static struct attribute_group ideapad_attribute_group = {
+ .attrs = ideapad_attributes
+};
+
/*
* Rfkill
*/
@@ -285,15 +386,6 @@ 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;
--
1.7.4.1
--
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