Commit 8b7a6a35 authored by Gwendal Grignou's avatar Gwendal Grignou Committed by Jonathan Cameron
Browse files

iio: cros_ec: add 'id' sysfs entry 



This new sysfs entry is used to interpret ring buffer information,
mainly by Android sensor HAL.
It expand to all sensors, the documentation about 'id' we can found
in Documentation/ABI/testing/sysfs-bus-iio-cros-ec.

Also fix typo in docs, I replace 'Septembre' by 'September'.

Signed-off-by: default avatarGwendal Grignou <gwendal@chromium.org>
Signed-off-by: default avatarFabien Lahoudere <fabien.lahoudere@collabora.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent d2fc0156

Documentation/ABI/testing/sysfs-bus-iio-cros-ec

+5 −5
Original line number Diff line number Diff line
@@ -18,11 +18,11 @@ Description: 
		values are 'base' and 'lid'.



What:		/sys/bus/iio/devices/iio:deviceX/id

Date:		Septembre 2017

Date:		September 2017

KernelVersion:	4.14

Contact:	linux-iio@vger.kernel.org

Description:

		This attribute is exposed by the CrOS EC legacy accelerometer

		driver and represents the sensor ID as exposed by the EC. This

		ID is used by the Android sensor service hardware abstraction

		layer (sensor HAL) through the Android container on ChromeOS.
 
		This attribute is exposed by the CrOS EC sensors driver and

		represents the sensor ID as exposed by the EC. This ID is used

		by the Android sensor service hardware abstraction layer (sensor

		HAL) through the Android container on ChromeOS.

drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c

+14 −0
Original line number Diff line number Diff line
@@ -125,6 +125,15 @@ static ssize_t cros_ec_sensors_calibrate(struct iio_dev *indio_dev, 
	return ret ? ret : len;

}



static ssize_t cros_ec_sensors_id(struct iio_dev *indio_dev,

				  uintptr_t private,

				  const struct iio_chan_spec *chan, char *buf)

{

	struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);



	return snprintf(buf, PAGE_SIZE, "%d\n", st->param.info.sensor_num);

}



static ssize_t cros_ec_sensors_loc(struct iio_dev *indio_dev,

		uintptr_t private, const struct iio_chan_spec *chan,

		char *buf)
@@ -140,6 +149,11 @@ const struct iio_chan_spec_ext_info cros_ec_sensors_ext_info[] = { 
		.shared = IIO_SHARED_BY_ALL,

		.write = cros_ec_sensors_calibrate

	},

	{

		.name = "id",

		.shared = IIO_SHARED_BY_ALL,

		.read = cros_ec_sensors_id

	},

	{

		.name = "location",

		.shared = IIO_SHARED_BY_ALL,

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