08c3e06a5e
This patch adds basic support for the PCF50633 ADC. The subtractive mode is not supported yet. Since we don't have adc subsystem, it currently lives in drivers/mfd. Signed-off-by: Balaji Rao <balajirrao@openmoko.org> Cc: Andy Green <andy@openmoko.com> Acked-by: Jonathan Cameron <jonathan.cameron@gmail.com> Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
/*
|
|
* adc.h -- Driver for NXP PCF50633 ADC
|
|
*
|
|
* (C) 2006-2008 by Openmoko, 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.
|
|
*/
|
|
|
|
#ifndef __LINUX_MFD_PCF50633_ADC_H
|
|
#define __LINUX_MFD_PCF50633_ADC_H
|
|
|
|
#include <linux/mfd/pcf50633/core.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
/* ADC Registers */
|
|
#define PCF50633_REG_ADCC3 0x52
|
|
#define PCF50633_REG_ADCC2 0x53
|
|
#define PCF50633_REG_ADCC1 0x54
|
|
#define PCF50633_REG_ADCS1 0x55
|
|
#define PCF50633_REG_ADCS2 0x56
|
|
#define PCF50633_REG_ADCS3 0x57
|
|
|
|
#define PCF50633_ADCC1_ADCSTART 0x01
|
|
#define PCF50633_ADCC1_RES_10BIT 0x02
|
|
#define PCF50633_ADCC1_AVERAGE_NO 0x00
|
|
#define PCF50633_ADCC1_AVERAGE_4 0x04
|
|
#define PCF50633_ADCC1_AVERAGE_8 0x08
|
|
#define PCF50633_ADCC1_AVERAGE_16 0x0c
|
|
#define PCF50633_ADCC1_MUX_BATSNS_RES 0x00
|
|
#define PCF50633_ADCC1_MUX_BATSNS_SUBTR 0x10
|
|
#define PCF50633_ADCC1_MUX_ADCIN2_RES 0x20
|
|
#define PCF50633_ADCC1_MUX_ADCIN2_SUBTR 0x30
|
|
#define PCF50633_ADCC1_MUX_BATTEMP 0x60
|
|
#define PCF50633_ADCC1_MUX_ADCIN1 0x70
|
|
#define PCF50633_ADCC1_AVERAGE_MASK 0x0c
|
|
#define PCF50633_ADCC1_ADCMUX_MASK 0xf0
|
|
|
|
#define PCF50633_ADCC2_RATIO_NONE 0x00
|
|
#define PCF50633_ADCC2_RATIO_BATTEMP 0x01
|
|
#define PCF50633_ADCC2_RATIO_ADCIN1 0x02
|
|
#define PCF50633_ADCC2_RATIO_BOTH 0x03
|
|
#define PCF50633_ADCC2_RATIOSETTL_100US 0x04
|
|
|
|
#define PCF50633_ADCC3_ACCSW_EN 0x01
|
|
#define PCF50633_ADCC3_NTCSW_EN 0x04
|
|
#define PCF50633_ADCC3_RES_DIV_TWO 0x10
|
|
#define PCF50633_ADCC3_RES_DIV_THREE 0x00
|
|
|
|
#define PCF50633_ADCS3_REF_NTCSW 0x00
|
|
#define PCF50633_ADCS3_REF_ACCSW 0x10
|
|
#define PCF50633_ADCS3_REF_2V0 0x20
|
|
#define PCF50633_ADCS3_REF_VISA 0x30
|
|
#define PCF50633_ADCS3_REF_2V0_2 0x70
|
|
#define PCF50633_ADCS3_ADCRDY 0x80
|
|
|
|
#define PCF50633_ADCS3_ADCDAT1L_MASK 0x03
|
|
#define PCF50633_ADCS3_ADCDAT2L_MASK 0x0c
|
|
#define PCF50633_ADCS3_ADCDAT2L_SHIFT 2
|
|
#define PCF50633_ASCS3_REF_MASK 0x70
|
|
|
|
extern int
|
|
pcf50633_adc_async_read(struct pcf50633 *pcf, int mux, int avg,
|
|
void (*callback)(struct pcf50633 *, void *, int),
|
|
void *callback_param);
|
|
extern int
|
|
pcf50633_adc_sync_read(struct pcf50633 *pcf, int mux, int avg);
|
|
|
|
#endif /* __LINUX_PCF50633_ADC_H */
|