diff options
| author | Bill Richardson <wfrichar@chromium.org> | 2013-11-07 08:03:46 -0800 |
|---|---|---|
| committer | chrome-internal-fetch <chrome-internal-fetch@google.com> | 2013-11-07 23:42:56 +0000 |
| commit | f23e68d721eb282619f1dd7b5b3ac4392234e6d4 (patch) | |
| tree | 0aab4bd5d2134572087477d92aa52c24ca58c220 /include | |
| parent | bb9b335e31cda78f4a0e7c3e546ffcc1499c989b (diff) | |
| download | chrome-ec-f23e68d721eb282619f1dd7b5b3ac4392234e6d4.tar.gz | |
Add ALS driver for light sensors connected to EC
This adds the driver and a console command to read an Intersil ISL29305
light sensor connected to the EC.
BUG=chrome-os-partner:23380
BRANCH=samus
TEST=manual
Run the "als" command from the EC console, while pointing the sensor in
various directions. It should give higher numbers when facing a light
source. If you get "Error 1", it means the ALS isn't powered.
Change-Id: I855ed64dab7fc60e29126ab3e97669be24dc6a64
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/176056
Diffstat (limited to 'include')
| -rw-r--r-- | include/als.h | 32 | ||||
| -rw-r--r-- | include/config.h | 7 |
2 files changed, 39 insertions, 0 deletions
diff --git a/include/als.h b/include/als.h new file mode 100644 index 0000000000..e229a3791f --- /dev/null +++ b/include/als.h @@ -0,0 +1,32 @@ +/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef __CROS_EC_ALS_H +#define __CROS_EC_ALS_H + +#include "common.h" + +/* Defined in board.h */ +enum als_id; + +/* Initialized in board.c */ +struct als_t { + const char const *name; + int (*read)(int *lux); +}; + +extern struct als_t als[]; + +/** + * Read an ALS + * + * @param id Which one? + * @param lux Put value here + * + * @return EC_SUCCESS, or non-zero if error. + */ +int als_read(enum als_id id, int *lux); + +#endif /* __CROS_EC_ALS_H */ diff --git a/include/config.h b/include/config.h index c6e151158e..002d509def 100644 --- a/include/config.h +++ b/include/config.h @@ -46,6 +46,13 @@ #undef CONFIG_ADC_CLOCK /* + * Some ALS modules may be connected to the EC. We need the command, and + * specific drivers for each module. + */ +#undef CONFIG_ALS +#undef CONFIG_ALS_ISL29035 + +/* * Support controlling the display backlight based on the state of the lid * switch. The EC will disable the backlight when the lid is closed. */ |