sensors: Fix IIO buffer corruption

- Fix buffer corruption during FIFO flush by preserving buffer offsets when
  data buffer pointer passed in is NULL.  A NULL pointer signals a FIFO flush.
- Expanded scale and offset per channel.
- Abstract HW driver from Linux IIO allowing drop in for sensor hub RTOS.
- The option to increase resolution from micro to nano from kernel for more
  floating point precision in user space.  Used when fusion is not on AP.
- Add a generic IIO sensor type for Linux sensor support, i.e. non-Android
  specific sensor.
- Expand the IIO layer to allow for a status byte.  Allows non-AP fusion as
  well as adds a sideband for FSYNC data, (sync signal from camera).
- Allow for a data-less sensor event, (sends timestamp only).  Think step and
  significant motion.
- Allow for versatile timestamp size in case from sensor hub.
- Add orientation matrix debug input.
- Add debug output to light module.

Bug 1612040

Change-Id: I34685676cd92790e033d05149fef3541f7d57400
Signed-off-by: Erik Lilliebjerg <elilliebjerg@nvidia.com>
Reviewed-on: http://git-master/r/709626
Reviewed-by: Joshua Cha <joshuac@nvidia.com>
Reviewed-by: Ira Zhuang <izhuang@nvidia.com>
Reviewed-by: Robert Collins <rcollins@nvidia.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/include/linux/nvs_proximity.h b/include/linux/nvs_proximity.h
index d8707b376..1e040c256 100644
--- a/include/linux/nvs_proximity.h
+++ b/include/linux/nvs_proximity.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2014, NVIDIA CORPORATION.  All rights reserved.
+/* Copyright (c) 2014-2015, NVIDIA CORPORATION.  All rights reserved.
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
@@ -15,6 +15,7 @@
 #define _NVS_PROXIMITY_H_
 
 #include <linux/iio/iio.h>
+#include <linux/of.h>
 #include <linux/nvs.h>
 
 #define RET_POLL_NEXT                   (-1)
@@ -22,6 +23,7 @@
 #define RET_HW_UPDATE                   (1)
 
 #define NVS_PROXIMITY_STRING            "proximity"
+#define SENSOR_FLAG_ON_CHANGE_MODE      0x2 /* from AOS sensors.h */
 
 /**
  * struct nvs_proximity - the common structure between the
@@ -112,5 +114,7 @@ static const struct iio_chan_spec iio_chan_spec_nvs_proximity[] = {
 
 int nvs_proximity_enable(struct nvs_proximity *np);
 int nvs_proximity_read(struct nvs_proximity *np);
+int nvs_proximity_of_dt(struct nvs_proximity *np, const struct device_node *dn,
+                        const char *dev_name);
 
 #endif /* _NVS_PROXIMITY_H_ */