5  * Based on ALS driver:
25 #define ACPI_ALS_CLASS			"als"
26 #define ACPI_ALS_DEVICE_NAME		"acpi-als"
29 ACPI_MODULE_NAME("acpi-als");
85 static int acpi_als_read_value(struct acpi_als *als, char *prop, s32 *val)  in acpi_als_read_value()  argument
90 	status = acpi_evaluate_integer(als->device->handle, prop, NULL,  in acpi_als_read_value()
94 		ACPI_EXCEPTION((AE_INFO, status, "Error reading ALS %s", prop));  in acpi_als_read_value()
106 	struct acpi_als *als = iio_priv(indio_dev);  in acpi_als_notify()  local
107 	s32 *buffer = als->evt_buffer;  in acpi_als_notify()
112 	mutex_lock(&als->lock);  in acpi_als_notify()
118 		ret = acpi_als_read_value(als, ACPI_ALS_ILLUMINANCE, &val);  in acpi_als_notify()
125 		dev_dbg(&device->dev, "Unhandled ACPI ALS event (%08x)!\n",  in acpi_als_notify()
130 	iio_push_to_buffers_with_timestamp(indio_dev, als->evt_buffer, time_ns);  in acpi_als_notify()
133 	mutex_unlock(&als->lock);  in acpi_als_notify()
140 	struct acpi_als *als = iio_priv(indio_dev);  in acpi_als_read_raw()  local
151 	ret = acpi_als_read_value(als, ACPI_ALS_ILLUMINANCE, &temp_val);  in acpi_als_read_raw()
166 	struct acpi_als *als;  in acpi_als_add()  local
170 	indio_dev = devm_iio_device_alloc(&device->dev, sizeof(*als));  in acpi_als_add()
174 	als = iio_priv(indio_dev);  in acpi_als_add()
177 	als->device = device;  in acpi_als_add()
178 	mutex_init(&als->lock);  in acpi_als_add()