path: root/drivers/iio/light/gp2ap020a00f.c

/*
 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
 * Author: Jacek Anaszewski <j.anaszewski@samsung.com>
 *
 * IIO features supported by the driver:
 *
 * Read-only raw channels:
 *   - illuminance_clear [lux]
 *   - illuminance_ir
 *   - proximity
 *
 * Triggered buffer:
 *   - illuminance_clear
 *   - illuminance_ir
 *   - proximity
 *
 * Events:
 *   - illuminance_clear (rising and falling)
 *   - proximity (rising and falling)
 *     - both falling and rising thresholds for the proximity events
 *       must be set to the values greater than 0.
 *
 * The driver supports triggered buffers for all the three
 * channels as well as high and low threshold events for the
 * illuminance_clear and proxmimity channels. Triggers
 * can be enabled simultaneously with both illuminance_clear
 * events. Proximity events cannot be enabled simultaneously
 * with any triggers or illuminance events. Enabling/disabling
 * one of the proximity events automatically enables/disables
 * the other one.
 *
 * 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.
 */

#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irq_work.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <asm/unaligned.h>
#include <linux/iio/buffer.h>
#include <linux/iio/events.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/trigger.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>

#define GP2A_I2C_NAME "gp2ap020a00f"

/* Registers */
#define GP2AP020A00F_OP_REG	0x00 /* Basic operations */
#define GP2AP020A00F_ALS_REG	0x01 /* ALS related settings */
#define GP2AP020A00F_PS_REG	0x02 /* PS related settings */
#define GP2AP020A00F_LED_REG	0x03 /* LED reg */
#define GP2AP020A00F_TL_L_REG	0x04 /* ALS: Threshold low LSB */
#define GP2AP020A00F_TL_H_REG	0x05 /* ALS: Threshold low MSB */
#define GP2AP020A00F_TH_L_REG	0x06 /* ALS: Threshold high LSB */
#define GP2AP020A00F_TH_H_REG	0x07 /* ALS: Threshold high MSB */
#define GP2AP020A00F_PL_L_REG	0x08 /* PS: Threshold low LSB */
#define GP2AP020A00F_PL_H_REG	0x09 /* PS: Threshold low MSB */
#define GP2AP020A00F_PH_L_REG	0x0a /* PS: Threshold high LSB */
#define GP2AP020A00F_PH_H_REG	0x0b /* PS: Threshold high MSB */
#define GP2AP020A00F_D0_L_REG	0x0c /* ALS result: Clear/Illuminance LSB */
#define GP2AP020A00F_D0_H_REG	0x0d /* ALS result: Clear/Illuminance MSB */
#define GP