The controller contains some properties that could be interesting to users:
autosleep: after a configurable idle time, enter the sleep mode
automatically; wakeup is done on the first touch.
sensitivity: touch-sensitivity for the x and y axes
powermode: the current power mode the device is in (read only), this
also shows the current state in autosleep mode
firmware_version: read only
This patch exposes these via sysfs and lets the user configure
sensitivity and autosleep delay.
Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx>
---
drivers/input/touchscreen/auo-pixcir-ts.c | 189 +++++++++++++++++++++++++++++
1 files changed, 189 insertions(+), 0 deletions(-)
diff --git a/drivers/input/touchscreen/auo-pixcir-ts.c b/drivers/input/touchscreen/auo-pixcir-ts.c
index 94fb9fb..3b3ec68 100644
--- a/drivers/input/touchscreen/auo-pixcir-ts.c
+++ b/drivers/input/touchscreen/auo-pixcir-ts.c
@@ -91,6 +91,7 @@
#define AUO_PIXCIR_POWER_MASK 0x03
#define AUO_PIXCIR_POWER_ALLOW_SLEEP (1 << 2)
+#define AUO_PIXCIR_POWER_IDLE_SHIFT 4
#define AUO_PIXCIR_POWER_IDLE_TIME(ms) ((ms & 0xf) << 4)
#define AUO_PIXCIR_CALIBRATE 0x03
@@ -286,6 +287,37 @@ static int auo_pixcir_power_mode(struct auo_pixcir_ts *ts, int mode)
return 0;
}
+static int auo_pixcir_autosleep(struct auo_pixcir_ts *ts, unsigned int ms)
+{
+ struct i2c_client *client = ts->client;
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_POWER_MODE);
+ if (ret < 0) {
+ dev_err(&client->dev, "unable to read reg %Xh, %d\n",
+ AUO_PIXCIR_REG_POWER_MODE, ret);
+ return ret;
+ }
+
+ if (ms > 0) {
+ dev_dbg(&client->dev, "activating autosleep\n");
+ ret |= AUO_PIXCIR_POWER_ALLOW_SLEEP;
+ ret |= AUO_PIXCIR_POWER_IDLE_TIME(ms);
+ } else {
+ dev_dbg(&client->dev, "deactivating autosleep\n");
+ ret &= ~AUO_PIXCIR_POWER_ALLOW_SLEEP;
+ }
+
+ ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_POWER_MODE, ret);
+ if (ret) {
+ dev_err(&client->dev, "unable to write reg %Xh, %d\n",
+ AUO_PIXCIR_REG_POWER_MODE, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
static __devinit int auo_pixcir_int_config(struct auo_pixcir_ts *ts,
int int_setting)
{
@@ -415,6 +447,155 @@ static void auo_pixcir_input_close(struct input_dev *dev)
return;
}
+/*
+ * sysfs-attributes
+ */
+
+static ssize_t auo_pixcir_autosleep_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_POWER_MODE);
+ if (ret < 0) {
+ dev_err(&client->dev, "unable to read reg %Xh, %d\n",
+ AUO_PIXCIR_REG_POWER_MODE, ret);
+ return ret;
+ }
+
+ ret = (ret & AUO_PIXCIR_POWER_ALLOW_SLEEP)
+ ? ret >> AUO_PIXCIR_POWER_IDLE_SHIFT
+ : 0;
+
+ return sprintf(buf, "%d\n", ret);
+}
+
+static ssize_t auo_pixcir_autosleep_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct auo_pixcir_ts *ts = i2c_get_clientdata(client);
+ unsigned int val;
+ int ret;
+
+ ret = kstrtouint(buf, 10, &val);
+ if (ret)
+ return ret;
+
+ ret = auo_pixcir_autosleep(ts, val);
+ if (ret)
+ return ret;
+
+ return count;
+}
+
+static ssize_t auo_pixcir_powermode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_POWER_MODE);
+ if (ret < 0) {
+ dev_err(&client->dev, "unable to read reg %Xh, %d\n",
+ AUO_PIXCIR_REG_POWER_MODE, ret);
+ return ret;
+ }
+
+ ret &= AUO_PIXCIR_POWER_MASK;
+
+ return sprintf(buf, "%d\n", ret);
+}
+
+static ssize_t auo_pixcir_firmware_version_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_VERSION);
+ if (ret < 0) {
+ dev_err(&client->dev, "unable to read reg %Xh, %d\n",
+ AUO_PIXCIR_REG_VERSION, ret);
+ return ret;
+ }
+
+ return sprintf(buf, "%d\n", ret);
+}
+
+static ssize_t auo_pixcir_sensitivity_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int reg, ret;
+
+ reg = strncmp(attr->attr.name, "sensitivity_x", 13)
+ ? AUO_PIXCIR_REG_Y_SENSITIVITY
+ : AUO_PIXCIR_REG_X_SENSITIVITY;
+
+ ret = i2c_smbus_read_byte_data(client, reg);
+ if (ret < 0) {
+ dev_err(&client->dev, "unable to read reg %Xh, %d\n", reg, ret);
+ return ret;
+ }
+
+ return sprintf(buf, "%d\n", ret);
+}
+
+static ssize_t auo_pixcir_sensitivity_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int reg, ret, val;
+
+ ret = kstrtouint(buf, 10, &val);
+ if (ret)
+ return ret;
+
+ reg = strncmp(attr->attr.name, "sensitivity_x", 13)
+ ? AUO_PIXCIR_REG_Y_SENSITIVITY
+ : AUO_PIXCIR_REG_X_SENSITIVITY;
+
+ ret = i2c_smbus_write_byte_data(client, reg, val);
+ if (ret < 0) {
+ dev_err(&client->dev, "unable to write reg %Xh, %d\n",
+ reg, ret);
+ return ret;
+ }
+
+ return count;
+}
+
+static DEVICE_ATTR(autosleep, 0644, auo_pixcir_autosleep_show,
+ auo_pixcir_autosleep_store);
+static DEVICE_ATTR(powermode, 0444, auo_pixcir_powermode_show, NULL);
+static DEVICE_ATTR(firmware_version, 0444, auo_pixcir_firmware_version_show,
+ NULL);
+static DEVICE_ATTR(sensitivity_x, 0644, auo_pixcir_sensitivity_show,
+ auo_pixcir_sensitivity_store);
+static DEVICE_ATTR(sensitivity_y, 0644, auo_pixcir_sensitivity_show,
+ auo_pixcir_sensitivity_store);
+
+static struct attribute *auo_pixcir_attributes[] = {
+ &dev_attr_autosleep.attr,
+ &dev_attr_powermode.attr,
+ &dev_attr_firmware_version.attr,
+ &dev_attr_sensitivity_x.attr,
+ &dev_attr_sensitivity_y.attr,
+ NULL
+};
+
+static const struct attribute_group auo_pixcir_attr_group = {
+ .attrs = auo_pixcir_attributes,
+};
+
#ifdef CONFIG_PM_SLEEP
static int auo_pixcir_suspend(struct device *dev)
{
@@ -583,8 +764,14 @@ static int __devinit auo_pixcir_probe(struct i2c_client *client,
i2c_set_clientdata(client, ts);
+ ret = sysfs_create_group(&client->dev.kobj, &auo_pixcir_attr_group);
+ if (ret)
+ goto err_sysfs_register;
+
return 0;
+err_sysfs_register:
+ input_unregister_device(ts->input);
err_input_register:
free_irq(client->irq, ts);
err_fw_vers:
@@ -604,6 +791,8 @@ static int __devexit auo_pixcir_remove(struct i2c_client *client)
struct auo_pixcir_ts *ts = i2c_get_clientdata(client);
const struct auo_pixcir_ts_platdata *pdata = client->dev.platform_data;
+ sysfs_remove_group(&client->dev.kobj, &auo_pixcir_attr_group);
+
free_irq(client->irq, ts);
input_unregister_device(ts->input);
--
1.7.5.4
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