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drivers/misc: driver for APDS990X ALS and proximity sensors

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This is a driver for Avago APDS990X combined ALS and proximity sensor.

Interface is sysfs based.  The driver uses interrupts to provide new data.
The driver supports pm_runtime and regulator frameworks.

See Documentation/misc-devices/apds990x.txt for details

Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Samu Onkalo 2010-10-26 14:22:38 -07:00 • committed by Linus Torvalds
parent 190420ab34
commit 92b1f84d46
4 changed files with 1386 additions and 0 deletions
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79
include/linux/i2c/apds990x.h Normal file
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/*
* This file is part of the APDS990x sensor driver.
* Chip is combined proximity and ambient light sensor.
*
* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
*
* Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#ifndef __APDS990X_H__
#define __APDS990X_H__
#define APDS_IRLED_CURR_12mA 0x3
#define APDS_IRLED_CURR_25mA 0x2
#define APDS_IRLED_CURR_50mA 0x1
#define APDS_IRLED_CURR_100mA 0x0
/**
* struct apds990x_chip_factors - defines effect of the cover window
* @ga: Total glass attenuation
* @cf1: clear channel factor 1 for raw to lux conversion
* @irf1: IR channel factor 1 for raw to lux conversion
* @cf2: clear channel factor 2 for raw to lux conversion
* @irf2: IR channel factor 2 for raw to lux conversion
* @df: device factor for conversion formulas
*
* Structure for tuning ALS calculation to match with environment.
* Values depend on the material above the sensor and the sensor
* itself. If the GA is zero, driver will use uncovered sensor default values
* format: decimal value * APDS_PARAM_SCALE except df which is plain integer.
*/
#define APDS_PARAM_SCALE 4096
struct apds990x_chip_factors {
int ga;
int cf1;
int irf1;
int cf2;
int irf2;
int df;
};
/**
* struct apds990x_platform_data - platform data for apsd990x.c driver
* @cf: chip factor data
* @pddrive: IR-led driving current
* @ppcount: number of IR pulses used for proximity estimation
* @setup_resources: interrupt line setup call back function
* @release_resources: interrupt line release call back function
*
* Proximity detection result depends heavily on correct ppcount, pdrive
* and cover window.
*
*/
struct apds990x_platform_data {
struct apds990x_chip_factors cf;
u8 pdrive;
u8 ppcount;
int (*setup_resources)(void);
int (*release_resources)(void);
};
#endif