804 lines
22 KiB
C
804 lines
22 KiB
C
/*
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* iio/adc/ad799x.c
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* Copyright (C) 2010-1011 Michael Hennerich, Analog Devices Inc.
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*
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* based on iio/adc/max1363
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* Copyright (C) 2008-2010 Jonathan Cameron
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*
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* based on linux/drivers/i2c/chips/max123x
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* Copyright (C) 2002-2004 Stefan Eletzhofer
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*
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* based on linux/drivers/acron/char/pcf8583.c
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* Copyright (C) 2000 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* ad799x.c
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*
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* Support for ad7991, ad7995, ad7999, ad7992, ad7993, ad7994, ad7997,
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* ad7998 and similar chips.
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*
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*/
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#include <linux/interrupt.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/sysfs.h>
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#include <linux/i2c.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include "../iio.h"
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#include "../sysfs.h"
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#include "../ring_generic.h"
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#include "ad799x.h"
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/*
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* ad799x register access by I2C
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*/
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static int ad799x_i2c_read16(struct ad799x_state *st, u8 reg, u16 *data)
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{
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struct i2c_client *client = st->client;
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int ret = 0;
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ret = i2c_smbus_read_word_data(client, reg);
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if (ret < 0) {
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dev_err(&client->dev, "I2C read error\n");
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return ret;
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}
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*data = swab16((u16)ret);
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return 0;
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}
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static int ad799x_i2c_read8(struct ad799x_state *st, u8 reg, u8 *data)
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{
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struct i2c_client *client = st->client;
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int ret = 0;
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret < 0) {
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dev_err(&client->dev, "I2C read error\n");
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return ret;
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}
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*data = (u8)ret;
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return 0;
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}
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static int ad799x_i2c_write16(struct ad799x_state *st, u8 reg, u16 data)
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{
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struct i2c_client *client = st->client;
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int ret = 0;
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ret = i2c_smbus_write_word_data(client, reg, swab16(data));
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if (ret < 0)
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dev_err(&client->dev, "I2C write error\n");
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return ret;
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}
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static int ad799x_i2c_write8(struct ad799x_state *st, u8 reg, u8 data)
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{
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struct i2c_client *client = st->client;
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int ret = 0;
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ret = i2c_smbus_write_byte_data(client, reg, data);
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if (ret < 0)
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dev_err(&client->dev, "I2C write error\n");
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return ret;
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}
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int ad7997_8_set_scan_mode(struct ad799x_state *st, unsigned mask)
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{
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return ad799x_i2c_write16(st, AD7998_CONF_REG,
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st->config | (mask << AD799X_CHANNEL_SHIFT));
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}
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static int ad799x_scan_direct(struct ad799x_state *st, unsigned ch)
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{
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u16 rxbuf;
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u8 cmd;
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int ret;
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switch (st->id) {
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case ad7991:
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case ad7995:
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case ad7999:
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cmd = st->config | ((1 << ch) << AD799X_CHANNEL_SHIFT);
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break;
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case ad7992:
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case ad7993:
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case ad7994:
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cmd = (1 << ch) << AD799X_CHANNEL_SHIFT;
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break;
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case ad7997:
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case ad7998:
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cmd = (ch << AD799X_CHANNEL_SHIFT) | AD7997_8_READ_SINGLE;
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break;
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default:
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return -EINVAL;
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}
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ret = ad799x_i2c_read16(st, cmd, &rxbuf);
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if (ret < 0)
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return ret;
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return rxbuf;
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}
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static int ad799x_read_raw(struct iio_dev *dev_info,
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struct iio_chan_spec const *chan,
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int *val,
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int *val2,
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long m)
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{
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int ret;
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struct ad799x_state *st = iio_priv(dev_info);
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unsigned int scale_uv;
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switch (m) {
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case 0:
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mutex_lock(&dev_info->mlock);
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if (iio_ring_enabled(dev_info))
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ret = ad799x_single_channel_from_ring(st,
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1 << chan->address);
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else
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ret = ad799x_scan_direct(st, chan->address);
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mutex_unlock(&dev_info->mlock);
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if (ret < 0)
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return ret;
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*val = (ret >> st->chip_info->channel[0].scan_type.shift) &
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RES_MASK(st->chip_info->channel[0].scan_type.realbits);
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return IIO_VAL_INT;
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case (1 << IIO_CHAN_INFO_SCALE_SHARED):
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scale_uv = (st->int_vref_mv * 1000)
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>> st->chip_info->channel[0].scan_type.realbits;
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*val = scale_uv / 1000;
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*val2 = (scale_uv % 1000) * 1000;
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return IIO_VAL_INT_PLUS_MICRO;
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}
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return -EINVAL;
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}
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static ssize_t ad799x_read_frequency(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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struct ad799x_state *st = iio_priv(dev_info);
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int ret, len = 0;
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u8 val;
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ret = ad799x_i2c_read8(st, AD7998_CYCLE_TMR_REG, &val);
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if (ret)
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return ret;
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val &= AD7998_CYC_MASK;
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switch (val) {
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case AD7998_CYC_DIS:
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len = sprintf(buf, "0\n");
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break;
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case AD7998_CYC_TCONF_32:
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len = sprintf(buf, "15625\n");
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break;
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case AD7998_CYC_TCONF_64:
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len = sprintf(buf, "7812\n");
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break;
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case AD7998_CYC_TCONF_128:
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len = sprintf(buf, "3906\n");
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break;
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case AD7998_CYC_TCONF_256:
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len = sprintf(buf, "1953\n");
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break;
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case AD7998_CYC_TCONF_512:
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len = sprintf(buf, "976\n");
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break;
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case AD7998_CYC_TCONF_1024:
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len = sprintf(buf, "488\n");
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break;
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case AD7998_CYC_TCONF_2048:
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len = sprintf(buf, "244\n");
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break;
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}
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return len;
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}
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static ssize_t ad799x_write_frequency(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t len)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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struct ad799x_state *st = iio_priv(dev_info);
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long val;
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int ret;
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u8 t;
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ret = strict_strtol(buf, 10, &val);
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if (ret)
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return ret;
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mutex_lock(&dev_info->mlock);
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ret = ad799x_i2c_read8(st, AD7998_CYCLE_TMR_REG, &t);
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if (ret)
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goto error_ret_mutex;
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/* Wipe the bits clean */
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t &= ~AD7998_CYC_MASK;
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switch (val) {
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case 15625:
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t |= AD7998_CYC_TCONF_32;
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break;
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case 7812:
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t |= AD7998_CYC_TCONF_64;
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break;
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case 3906:
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t |= AD7998_CYC_TCONF_128;
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break;
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case 1953:
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t |= AD7998_CYC_TCONF_256;
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break;
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case 976:
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t |= AD7998_CYC_TCONF_512;
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break;
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case 488:
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t |= AD7998_CYC_TCONF_1024;
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break;
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case 244:
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t |= AD7998_CYC_TCONF_2048;
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break;
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case 0:
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t |= AD7998_CYC_DIS;
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break;
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default:
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ret = -EINVAL;
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goto error_ret_mutex;
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}
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ret = ad799x_i2c_write8(st, AD7998_CYCLE_TMR_REG, t);
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error_ret_mutex:
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mutex_unlock(&dev_info->mlock);
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return ret ? ret : len;
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}
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static ssize_t ad799x_read_channel_config(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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struct ad799x_state *st = iio_priv(dev_info);
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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int ret;
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u16 val;
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ret = ad799x_i2c_read16(st, this_attr->address, &val);
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if (ret)
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return ret;
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return sprintf(buf, "%d\n", val);
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}
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static ssize_t ad799x_write_channel_config(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t len)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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struct ad799x_state *st = iio_priv(dev_info);
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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long val;
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int ret;
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ret = strict_strtol(buf, 10, &val);
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if (ret)
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return ret;
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mutex_lock(&dev_info->mlock);
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ret = ad799x_i2c_write16(st, this_attr->address, val);
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mutex_unlock(&dev_info->mlock);
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return ret ? ret : len;
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}
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static irqreturn_t ad799x_event_handler(int irq, void *private)
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{
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struct iio_dev *indio_dev = private;
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struct ad799x_state *st = iio_priv(private);
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u8 status;
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int i, ret;
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ret = ad799x_i2c_read8(st, AD7998_ALERT_STAT_REG, &status);
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if (ret)
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return ret;
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if (!status)
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return -EIO;
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ad799x_i2c_write8(st, AD7998_ALERT_STAT_REG, AD7998_ALERT_STAT_CLEAR);
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for (i = 0; i < 8; i++) {
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if (status & (1 << i))
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iio_push_event(indio_dev,
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i & 0x1 ?
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IIO_UNMOD_EVENT_CODE(IIO_IN,
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(i >> 1),
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IIO_EV_TYPE_THRESH,
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IIO_EV_DIR_RISING) :
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IIO_UNMOD_EVENT_CODE(IIO_IN,
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(i >> 1),
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IIO_EV_TYPE_THRESH,
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IIO_EV_DIR_FALLING),
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iio_get_time_ns());
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}
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return IRQ_HANDLED;
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}
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static IIO_DEVICE_ATTR(in0_thresh_low_value,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_DATALOW_CH1_REG);
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static IIO_DEVICE_ATTR(in0_thresh_high_value,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_DATAHIGH_CH1_REG);
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static IIO_DEVICE_ATTR(in0_thresh_both_hyst_raw,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_HYST_CH1_REG);
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static IIO_DEVICE_ATTR(in1_thresh_low_value,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_DATALOW_CH2_REG);
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static IIO_DEVICE_ATTR(in1_thresh_high_value,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_DATAHIGH_CH2_REG);
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static IIO_DEVICE_ATTR(in1_thresh_both_hyst_raw,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_HYST_CH2_REG);
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static IIO_DEVICE_ATTR(in2_thresh_low_value,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_DATALOW_CH3_REG);
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static IIO_DEVICE_ATTR(in2_thresh_high_value,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_DATAHIGH_CH3_REG);
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static IIO_DEVICE_ATTR(in2_thresh_both_hyst_raw,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_HYST_CH3_REG);
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static IIO_DEVICE_ATTR(in3_thresh_low_value,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_DATALOW_CH4_REG);
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static IIO_DEVICE_ATTR(in3_thresh_high_value,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_DATAHIGH_CH4_REG);
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static IIO_DEVICE_ATTR(in3_thresh_both_hyst_raw,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_HYST_CH4_REG);
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static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
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ad799x_read_frequency,
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ad799x_write_frequency);
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static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("15625 7812 3906 1953 976 488 244 0");
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static struct attribute *ad7993_4_7_8_event_attributes[] = {
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&iio_dev_attr_in0_thresh_low_value.dev_attr.attr,
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&iio_dev_attr_in0_thresh_high_value.dev_attr.attr,
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&iio_dev_attr_in0_thresh_both_hyst_raw.dev_attr.attr,
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&iio_dev_attr_in1_thresh_low_value.dev_attr.attr,
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&iio_dev_attr_in1_thresh_high_value.dev_attr.attr,
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&iio_dev_attr_in1_thresh_both_hyst_raw.dev_attr.attr,
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&iio_dev_attr_in2_thresh_low_value.dev_attr.attr,
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&iio_dev_attr_in2_thresh_high_value.dev_attr.attr,
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&iio_dev_attr_in2_thresh_both_hyst_raw.dev_attr.attr,
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&iio_dev_attr_in3_thresh_low_value.dev_attr.attr,
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&iio_dev_attr_in3_thresh_high_value.dev_attr.attr,
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&iio_dev_attr_in3_thresh_both_hyst_raw.dev_attr.attr,
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&iio_dev_attr_sampling_frequency.dev_attr.attr,
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&iio_const_attr_sampling_frequency_available.dev_attr.attr,
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NULL,
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};
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static struct attribute_group ad7993_4_7_8_event_attrs_group = {
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.attrs = ad7993_4_7_8_event_attributes,
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.name = "events",
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};
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static struct attribute *ad7992_event_attributes[] = {
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&iio_dev_attr_in0_thresh_low_value.dev_attr.attr,
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&iio_dev_attr_in0_thresh_high_value.dev_attr.attr,
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&iio_dev_attr_in0_thresh_both_hyst_raw.dev_attr.attr,
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&iio_dev_attr_in1_thresh_low_value.dev_attr.attr,
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&iio_dev_attr_in1_thresh_high_value.dev_attr.attr,
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&iio_dev_attr_in1_thresh_both_hyst_raw.dev_attr.attr,
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&iio_dev_attr_sampling_frequency.dev_attr.attr,
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&iio_const_attr_sampling_frequency_available.dev_attr.attr,
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NULL,
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};
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static struct attribute_group ad7992_event_attrs_group = {
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.attrs = ad7992_event_attributes,
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.name = "events",
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};
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static const struct iio_info ad7991_info = {
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.read_raw = &ad799x_read_raw,
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.driver_module = THIS_MODULE,
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};
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static const struct iio_info ad7992_info = {
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.read_raw = &ad799x_read_raw,
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.event_attrs = &ad7992_event_attrs_group,
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.driver_module = THIS_MODULE,
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};
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static const struct iio_info ad7993_4_7_8_info = {
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.read_raw = &ad799x_read_raw,
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.event_attrs = &ad7993_4_7_8_event_attrs_group,
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.driver_module = THIS_MODULE,
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};
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static const struct ad799x_chip_info ad799x_chip_info_tbl[] = {
|
|
[ad7991] = {
|
|
.channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
0, 0, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
1, 1, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
2, 2, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
3, 3, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
|
|
.num_channels = 5,
|
|
.int_vref_mv = 4096,
|
|
.info = &ad7991_info,
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|
},
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|
[ad7995] = {
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|
.channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
0, 0, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
1, 1, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
2, 2, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
3, 3, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
|
|
.num_channels = 5,
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|
.int_vref_mv = 1024,
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|
.info = &ad7991_info,
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|
},
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|
[ad7999] = {
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|
.channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
0, 0, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
1, 1, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
2, 2, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
3, 3, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
|
|
.num_channels = 5,
|
|
.int_vref_mv = 1024,
|
|
.info = &ad7991_info,
|
|
},
|
|
[ad7992] = {
|
|
.channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
0, 0, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
1, 1, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[2] = IIO_CHAN_SOFT_TIMESTAMP(2),
|
|
.num_channels = 3,
|
|
.int_vref_mv = 4096,
|
|
.default_config = AD7998_ALERT_EN,
|
|
.info = &ad7992_info,
|
|
},
|
|
[ad7993] = {
|
|
.channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
0, 0, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
1, 1, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
2, 2, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
3, 3, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
|
|
.num_channels = 5,
|
|
.int_vref_mv = 1024,
|
|
.default_config = AD7998_ALERT_EN,
|
|
.info = &ad7993_4_7_8_info,
|
|
},
|
|
[ad7994] = {
|
|
.channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
0, 0, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
1, 1, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
2, 2, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
3, 3, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
|
|
.num_channels = 5,
|
|
.int_vref_mv = 4096,
|
|
.default_config = AD7998_ALERT_EN,
|
|
.info = &ad7993_4_7_8_info,
|
|
},
|
|
[ad7997] = {
|
|
.channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
0, 0, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
1, 1, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
2, 2, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
3, 3, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[4] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 4, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
4, 4, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[5] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 5, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
5, 5, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[6] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 6, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
6, 6, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[7] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 7, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
7, 7, IIO_ST('u', 10, 16, 0), 0),
|
|
.channel[8] = IIO_CHAN_SOFT_TIMESTAMP(8),
|
|
.num_channels = 9,
|
|
.int_vref_mv = 1024,
|
|
.default_config = AD7998_ALERT_EN,
|
|
.info = &ad7993_4_7_8_info,
|
|
},
|
|
[ad7998] = {
|
|
.channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
0, 0, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
1, 1, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
2, 2, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
3, 3, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[4] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 4, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
4, 4, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[5] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 5, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
5, 5, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[6] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 6, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
6, 6, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[7] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 7, 0,
|
|
(1 << IIO_CHAN_INFO_SCALE_SHARED),
|
|
7, 7, IIO_ST('u', 12, 16, 0), 0),
|
|
.channel[8] = IIO_CHAN_SOFT_TIMESTAMP(8),
|
|
.num_channels = 9,
|
|
.int_vref_mv = 4096,
|
|
.default_config = AD7998_ALERT_EN,
|
|
.info = &ad7993_4_7_8_info,
|
|
},
|
|
};
|
|
|
|
static int __devinit ad799x_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
int ret, regdone = 0;
|
|
struct ad799x_platform_data *pdata = client->dev.platform_data;
|
|
struct ad799x_state *st;
|
|
struct iio_dev *indio_dev = iio_allocate_device(sizeof(*st));
|
|
|
|
if (indio_dev == NULL)
|
|
return -ENOMEM;
|
|
|
|
st = iio_priv(indio_dev);
|
|
/* this is only used for device removal purposes */
|
|
i2c_set_clientdata(client, indio_dev);
|
|
|
|
st->id = id->driver_data;
|
|
st->chip_info = &ad799x_chip_info_tbl[st->id];
|
|
st->config = st->chip_info->default_config;
|
|
|
|
/* TODO: Add pdata options for filtering and bit delay */
|
|
|
|
if (pdata)
|
|
st->int_vref_mv = pdata->vref_mv;
|
|
else
|
|
st->int_vref_mv = st->chip_info->int_vref_mv;
|
|
|
|
st->reg = regulator_get(&client->dev, "vcc");
|
|
if (!IS_ERR(st->reg)) {
|
|
ret = regulator_enable(st->reg);
|
|
if (ret)
|
|
goto error_put_reg;
|
|
}
|
|
st->client = client;
|
|
|
|
indio_dev->dev.parent = &client->dev;
|
|
indio_dev->name = id->name;
|
|
indio_dev->info = st->chip_info->info;
|
|
indio_dev->name = id->name;
|
|
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
indio_dev->channels = st->chip_info->channel;
|
|
indio_dev->num_channels = st->chip_info->num_channels;
|
|
|
|
ret = ad799x_register_ring_funcs_and_init(indio_dev);
|
|
if (ret)
|
|
goto error_disable_reg;
|
|
|
|
ret = iio_device_register(indio_dev);
|
|
if (ret)
|
|
goto error_cleanup_ring;
|
|
regdone = 1;
|
|
|
|
ret = iio_ring_buffer_register(indio_dev,
|
|
indio_dev->channels,
|
|
indio_dev->num_channels);
|
|
if (ret)
|
|
goto error_cleanup_ring;
|
|
|
|
if (client->irq > 0) {
|
|
ret = request_threaded_irq(client->irq,
|
|
NULL,
|
|
ad799x_event_handler,
|
|
IRQF_TRIGGER_FALLING |
|
|
IRQF_ONESHOT,
|
|
client->name,
|
|
indio_dev);
|
|
if (ret)
|
|
goto error_cleanup_ring;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error_cleanup_ring:
|
|
ad799x_ring_cleanup(indio_dev);
|
|
error_disable_reg:
|
|
if (!IS_ERR(st->reg))
|
|
regulator_disable(st->reg);
|
|
error_put_reg:
|
|
if (!IS_ERR(st->reg))
|
|
regulator_put(st->reg);
|
|
if (regdone)
|
|
iio_device_unregister(indio_dev);
|
|
else
|
|
iio_free_device(indio_dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static __devexit int ad799x_remove(struct i2c_client *client)
|
|
{
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(client);
|
|
struct ad799x_state *st = iio_priv(indio_dev);
|
|
|
|
if (client->irq > 0)
|
|
free_irq(client->irq, indio_dev);
|
|
|
|
iio_ring_buffer_unregister(indio_dev);
|
|
ad799x_ring_cleanup(indio_dev);
|
|
if (!IS_ERR(st->reg)) {
|
|
regulator_disable(st->reg);
|
|
regulator_put(st->reg);
|
|
}
|
|
iio_device_unregister(indio_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id ad799x_id[] = {
|
|
{ "ad7991", ad7991 },
|
|
{ "ad7995", ad7995 },
|
|
{ "ad7999", ad7999 },
|
|
{ "ad7992", ad7992 },
|
|
{ "ad7993", ad7993 },
|
|
{ "ad7994", ad7994 },
|
|
{ "ad7997", ad7997 },
|
|
{ "ad7998", ad7998 },
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, ad799x_id);
|
|
|
|
static struct i2c_driver ad799x_driver = {
|
|
.driver = {
|
|
.name = "ad799x",
|
|
},
|
|
.probe = ad799x_probe,
|
|
.remove = __devexit_p(ad799x_remove),
|
|
.id_table = ad799x_id,
|
|
};
|
|
|
|
static __init int ad799x_init(void)
|
|
{
|
|
return i2c_add_driver(&ad799x_driver);
|
|
}
|
|
|
|
static __exit void ad799x_exit(void)
|
|
{
|
|
i2c_del_driver(&ad799x_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
|
|
MODULE_DESCRIPTION("Analog Devices AD799x ADC");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("i2c:ad799x");
|
|
|
|
module_init(ad799x_init);
|
|
module_exit(ad799x_exit);
|