From 12bf745c9afb6755acba186091bcbb61229f4165 Mon Sep 17 00:00:00 2001 From: Gwendal Grignou Date: Mon, 15 Jul 2019 16:14:51 -0700 Subject: [PATCH] iio: cros_ec: Add sign vector in core for backward compatibility To allow cros_ec iio core library to be used with legacy device, add a vector to rotate sensor data if necessary: legacy devices are not reporting data in HTML5/Android sensor referential. Check the data is not rotated on recent chromebooks that use the HTML5 standard to present sensor data. Signed-off-by: Gwendal Grignou Reviewed-by: Douglas Anderson Signed-off-by: Jonathan Cameron --- drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c | 4 ++++ include/linux/iio/common/cros_ec_sensors_core.h | 2 +- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c index d02660b1f0fe..3b491cf7be95 100644 --- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c +++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c @@ -101,6 +101,9 @@ int cros_ec_sensors_core_init(struct platform_device *pdev, } state->type = state->resp->info.type; state->loc = state->resp->info.location; + + /* Set sign vector, only used for backward compatibility. */ + memset(state->sign, 1, CROS_EC_SENSOR_MAX_AXIS); } return 0; @@ -303,6 +306,7 @@ static int cros_ec_sensors_read_data_unsafe(struct iio_dev *indio_dev, if (ret < 0) return ret; + *data *= st->sign[i]; data++; } diff --git a/include/linux/iio/common/cros_ec_sensors_core.h b/include/linux/iio/common/cros_ec_sensors_core.h index bb03a252bd04..6f13c73bac3d 100644 --- a/include/linux/iio/common/cros_ec_sensors_core.h +++ b/include/linux/iio/common/cros_ec_sensors_core.h @@ -66,7 +66,7 @@ struct cros_ec_sensors_core_state { s16 offset; u16 scale; } calib[CROS_EC_SENSOR_MAX_AXIS]; - + s8 sign[CROS_EC_SENSOR_MAX_AXIS]; u8 samples[CROS_EC_SAMPLE_SIZE]; int (*read_ec_sensors_data)(struct iio_dev *indio_dev, -- 2.45.2