This is the ambient light sensor found on Iconia W500.
Signed-off-by: Marek Vasut <[email protected]>
Cc: joeyli <[email protected]>
---
drivers/platform/x86/acer-wmi.c | 46 +++++++++++++++++++++++++++++++++++++++
1 file changed, 46 insertions(+)
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index 2df0673..b8acfb5 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -148,6 +148,7 @@ struct event_return_value {
#define ACER_WMID3_GDS_WIMAX (1<<7) /* WiMAX */
#define ACER_WMID3_GDS_BLUETOOTH (1<<11) /* BT */
#define ACER_WMID3_GDS_ACCEL (1<<2) /* Accelerometer */
+#define ACER_WMID3_GDS_ALS (1<<8) /* Ambient light sensor */
struct lm_input_params {
u8 function_num; /* Function Number */
@@ -204,6 +205,7 @@ struct hotkey_function_type_aa {
#define ACER_CAP_BRIGHTNESS (1<<3)
#define ACER_CAP_THREEG (1<<4)
#define ACER_CAP_ACCEL (1<<5)
+#define ACER_CAP_ALS (1<<6)
#define ACER_CAP_ANY (0xFFFFFFFF)
/*
@@ -1156,6 +1158,8 @@ static void type_aa_dmi_decode(const struct dmi_header
*header, void *dummy)
interface->capability |= ACER_CAP_BLUETOOTH;
if (type_aa->others_func_bitmap & ACER_WMID3_GDS_ACCEL)
interface->capability |= ACER_CAP_ACCEL;
+ if (type_aa->others_func_bitmap & ACER_WMID3_GDS_ALS)
+ interface->capability |= ACER_CAP_ALS;
commun_fn_key_number = type_aa->commun_fn_key_number;
}
@@ -1381,6 +1385,39 @@ static void acer_backlight_exit(void)
}
/*
+ * Ambient light sensor device
+ */
+#define ACER_ALS_HANDLE "\\_SB.PCI0.LPC0.ALSD"
+#define ACER_ALS_INIT "\\_SB.PCI0.LPC0.ALSD._INI"
+#define ACER_ALS_ALI "\\_SB.PCI0.LPC0.ALSD._ALI"
+static ssize_t acer_als_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ acpi_handle handle;
+ acpi_status status;
+ struct acpi_buffer output;
+ union acpi_object out_obj;
+
+ status = acpi_get_handle(NULL, ACER_ALS_HANDLE, &handle);
+ if (ACPI_FAILURE(status))
+ return -1;
+
+ status = acpi_evaluate_object(NULL, ACER_ALS_INIT, NULL, NULL);
+ if (ACPI_FAILURE(status))
+ return -1;
+
+ output.length = sizeof(out_obj);
+ output.pointer = &out_obj;
+ status = acpi_evaluate_object(NULL, ACER_ALS_ALI, NULL, &output);
+ if (ACPI_FAILURE(status))
+ return -1;
+
+ return sprintf(buf, "%d\n", (u16)out_obj.integer.value);
+}
+
+static DEVICE_ATTR(ls_switch, S_IRUGO, acer_als_show, NULL);
+
+/*
* Accelerometer device
*/
#define ACER_GSENSOR_HANDLE "\\_SB.PCI0.LPC0.SENR"
@@ -2020,6 +2057,8 @@ static int remove_sysfs(struct platform_device *device)
{
if (has_cap(ACER_CAP_THREEG))
device_remove_file(&device->dev, &dev_attr_threeg);
+ if (has_cap(ACER_CAP_ALS))
+ device_remove_file(&device->dev, &dev_attr_ls_switch);
device_remove_file(&device->dev, &dev_attr_interface);
@@ -2037,6 +2076,13 @@ static int create_sysfs(void)
goto error_sysfs;
}
+ if (has_cap(ACER_CAP_ALS)) {
+ retval = device_create_file(&acer_platform_device->dev,
+ &dev_attr_ls_switch);
+ if (retval)
+ goto error_sysfs;
+ }
+
retval = device_create_file(&acer_platform_device->dev,
&dev_attr_interface);
if (retval)
--
1.7.10
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