3d6271f92e
Without turning the MADC clock on, no MADC conversions occur. $ cat /sys/class/hwmon/hwmon0/device/in8_input [ 53.428436] twl4030_madc twl4030_madc: conversion timeout! cat: read error: Resource temporarily unavailable Signed-off-by: Kyle Manna <kyle@kylemanna.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
145 lines
4 KiB
C
145 lines
4 KiB
C
/*
|
|
* twl4030_madc.h - Header for TWL4030 MADC
|
|
*
|
|
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
|
|
* J Keerthy <j-keerthy@ti.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 _TWL4030_MADC_H
|
|
#define _TWL4030_MADC_H
|
|
|
|
struct twl4030_madc_conversion_method {
|
|
u8 sel;
|
|
u8 avg;
|
|
u8 rbase;
|
|
u8 ctrl;
|
|
};
|
|
|
|
#define TWL4030_MADC_MAX_CHANNELS 16
|
|
|
|
|
|
/*
|
|
* twl4030_madc_request- madc request packet for channel conversion
|
|
* @channels: 16 bit bitmap for individual channels
|
|
* @do_avgP: sample the input channel for 4 consecutive cycles
|
|
* @method: RT, SW1, SW2
|
|
* @type: Polling or interrupt based method
|
|
*/
|
|
|
|
struct twl4030_madc_request {
|
|
unsigned long channels;
|
|
u16 do_avg;
|
|
u16 method;
|
|
u16 type;
|
|
bool active;
|
|
bool result_pending;
|
|
int rbuf[TWL4030_MADC_MAX_CHANNELS];
|
|
void (*func_cb)(int len, int channels, int *buf);
|
|
};
|
|
|
|
enum conversion_methods {
|
|
TWL4030_MADC_RT,
|
|
TWL4030_MADC_SW1,
|
|
TWL4030_MADC_SW2,
|
|
TWL4030_MADC_NUM_METHODS
|
|
};
|
|
|
|
enum sample_type {
|
|
TWL4030_MADC_WAIT,
|
|
TWL4030_MADC_IRQ_ONESHOT,
|
|
TWL4030_MADC_IRQ_REARM
|
|
};
|
|
|
|
#define TWL4030_MADC_CTRL1 0x00
|
|
#define TWL4030_MADC_CTRL2 0x01
|
|
|
|
#define TWL4030_MADC_RTSELECT_LSB 0x02
|
|
#define TWL4030_MADC_SW1SELECT_LSB 0x06
|
|
#define TWL4030_MADC_SW2SELECT_LSB 0x0A
|
|
|
|
#define TWL4030_MADC_RTAVERAGE_LSB 0x04
|
|
#define TWL4030_MADC_SW1AVERAGE_LSB 0x08
|
|
#define TWL4030_MADC_SW2AVERAGE_LSB 0x0C
|
|
|
|
#define TWL4030_MADC_CTRL_SW1 0x12
|
|
#define TWL4030_MADC_CTRL_SW2 0x13
|
|
|
|
#define TWL4030_MADC_RTCH0_LSB 0x17
|
|
#define TWL4030_MADC_GPCH0_LSB 0x37
|
|
|
|
#define TWL4030_MADC_MADCON (1 << 0) /* MADC power on */
|
|
#define TWL4030_MADC_BUSY (1 << 0) /* MADC busy */
|
|
/* MADC conversion completion */
|
|
#define TWL4030_MADC_EOC_SW (1 << 1)
|
|
/* MADC SWx start conversion */
|
|
#define TWL4030_MADC_SW_START (1 << 5)
|
|
#define TWL4030_MADC_ADCIN0 (1 << 0)
|
|
#define TWL4030_MADC_ADCIN1 (1 << 1)
|
|
#define TWL4030_MADC_ADCIN2 (1 << 2)
|
|
#define TWL4030_MADC_ADCIN3 (1 << 3)
|
|
#define TWL4030_MADC_ADCIN4 (1 << 4)
|
|
#define TWL4030_MADC_ADCIN5 (1 << 5)
|
|
#define TWL4030_MADC_ADCIN6 (1 << 6)
|
|
#define TWL4030_MADC_ADCIN7 (1 << 7)
|
|
#define TWL4030_MADC_ADCIN8 (1 << 8)
|
|
#define TWL4030_MADC_ADCIN9 (1 << 9)
|
|
#define TWL4030_MADC_ADCIN10 (1 << 10)
|
|
#define TWL4030_MADC_ADCIN11 (1 << 11)
|
|
#define TWL4030_MADC_ADCIN12 (1 << 12)
|
|
#define TWL4030_MADC_ADCIN13 (1 << 13)
|
|
#define TWL4030_MADC_ADCIN14 (1 << 14)
|
|
#define TWL4030_MADC_ADCIN15 (1 << 15)
|
|
|
|
/* Fixed channels */
|
|
#define TWL4030_MADC_BTEMP TWL4030_MADC_ADCIN1
|
|
#define TWL4030_MADC_VBUS TWL4030_MADC_ADCIN8
|
|
#define TWL4030_MADC_VBKB TWL4030_MADC_ADCIN9
|
|
#define TWL4030_MADC_ICHG TWL4030_MADC_ADCIN10
|
|
#define TWL4030_MADC_VCHG TWL4030_MADC_ADCIN11
|
|
#define TWL4030_MADC_VBAT TWL4030_MADC_ADCIN12
|
|
|
|
/* Step size and prescaler ratio */
|
|
#define TEMP_STEP_SIZE 147
|
|
#define TEMP_PSR_R 100
|
|
#define CURR_STEP_SIZE 147
|
|
#define CURR_PSR_R1 44
|
|
#define CURR_PSR_R2 88
|
|
|
|
#define TWL4030_BCI_BCICTL1 0x23
|
|
#define TWL4030_BCI_CGAIN 0x020
|
|
#define TWL4030_BCI_MESBAT (1 << 1)
|
|
#define TWL4030_BCI_TYPEN (1 << 4)
|
|
#define TWL4030_BCI_ITHEN (1 << 3)
|
|
|
|
#define REG_BCICTL2 0x024
|
|
#define TWL4030_BCI_ITHSENS 0x007
|
|
|
|
/* Register and bits for GPBR1 register */
|
|
#define TWL4030_REG_GPBR1 0x0c
|
|
#define TWL4030_GPBR1_MADC_HFCLK_EN (1 << 7)
|
|
|
|
struct twl4030_madc_user_parms {
|
|
int channel;
|
|
int average;
|
|
int status;
|
|
u16 result;
|
|
};
|
|
|
|
int twl4030_madc_conversion(struct twl4030_madc_request *conv);
|
|
int twl4030_get_madc_conversion(int channel_no);
|
|
#endif
|