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Diffstat (limited to 'include/linux/i2c/mpr.h')
| -rw-r--r-- | include/linux/i2c/mpr.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/include/linux/i2c/mpr.h b/include/linux/i2c/mpr.h new file mode 100644 index 000000000000..ded00db775f3 --- /dev/null +++ b/include/linux/i2c/mpr.h @@ -0,0 +1,79 @@ +/* + * Copyright (C) 2010-2011 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 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 0x0f +#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 |