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/*
* Copyright (C) 2010-2012 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* 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.
*/
/* mpr.h - Header file for Freescale MPR121 Capacitive Touch Sensor Controllor */
#ifndef MPR_H
#define MPR_H
/* Register definitions */
#define ELE_TOUCH_STATUS_0_ADDR 0x0
#define ELE_TOUCH_STATUS_1_ADDR 0X1
#define MHD_RISING_ADDR 0x2b
#define NHD_RISING_ADDR 0x2c
#define NCL_RISING_ADDR 0x2d
#define FDL_RISING_ADDR 0x2e
#define MHD_FALLING_ADDR 0x2f
#define NHD_FALLING_ADDR 0x30
#define NCL_FALLING_ADDR 0x31
#define FDL_FALLING_ADDR 0x32
#define ELE0_TOUCH_THRESHOLD_ADDR 0x41
#define ELE0_RELEASE_THRESHOLD_ADDR 0x42
/* ELE0...ELE11's threshold will set in a loop */
#define AFE_CONF_ADDR 0x5c
#define FILTER_CONF_ADDR 0x5d
/* ELECTRODE_CONF: this register is most important register, it
* control how many of electrode is enabled. If you set this register
* to 0x0, it make the sensor going to suspend mode. Other value(low
* bit is non-zero) will make the sensor into Run mode. This register
* should be write at last.
*/
#define ELECTRODE_CONF_ADDR 0x5e
#define ECR_CL_BT_5BIT_VAL 0x80
#define AUTO_CONFIG_CTRL_ADDR 0x7b
/* AUTO_CONFIG_USL: Upper Limit for auto baseline search, this
* register is related to VDD supplied on your board, the value of
* this register is calc by EQ: `((VDD-0.7)/VDD) * 256`.
* AUTO_CONFIG_LSL: Low Limit of auto baseline search. This is 65% of
* USL AUTO_CONFIG_TL: The Traget Level of auto baseline search, This
* is 90% of USL */
#define AUTO_CONFIG_USL_ADDR 0x7d
#define AUTO_CONFIG_LSL_ADDR 0x7e
#define AUTO_CONFIG_TL_ADDR 0x7f
/* Threshold of touch/release trigger */
#define TOUCH_THRESHOLD 0x0c
#define RELEASE_THRESHOLD 0x0a
/* Mask Button bits of STATUS_0 & STATUS_1 register */
#define TOUCH_STATUS_MASK 0xfff
/* MPR121 have 12 electrodes */
#define MPR121_MAX_KEY_COUNT 12
/**
* @keycount: how many key maped
* @vdd_uv: voltage of vdd supply the chip in uV
* @matrix: maxtrix of keys
* @wakeup: can key wake up system.
*/
struct mpr121_platform_data {
u16 keycount;
u16 *matrix;
int wakeup;
int vdd_uv;
};
#endif
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