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939 lines
22 KiB
939 lines
22 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* iio/adc/ad799x.c |
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* Copyright (C) 2010-2011 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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* 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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#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 <linux/bitops.h> |
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|
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#include <linux/iio/iio.h> |
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#include <linux/iio/sysfs.h> |
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#include <linux/iio/events.h> |
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#include <linux/iio/buffer.h> |
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#include <linux/iio/trigger_consumer.h> |
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#include <linux/iio/triggered_buffer.h> |
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|
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#define AD799X_CHANNEL_SHIFT 4 |
|
|
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/* |
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* AD7991, AD7995 and AD7999 defines |
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*/ |
|
|
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#define AD7991_REF_SEL 0x08 |
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#define AD7991_FLTR 0x04 |
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#define AD7991_BIT_TRIAL_DELAY 0x02 |
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#define AD7991_SAMPLE_DELAY 0x01 |
|
|
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/* |
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* AD7992, AD7993, AD7994, AD7997 and AD7998 defines |
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*/ |
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|
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#define AD7998_FLTR BIT(3) |
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#define AD7998_ALERT_EN BIT(2) |
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#define AD7998_BUSY_ALERT BIT(1) |
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#define AD7998_BUSY_ALERT_POL BIT(0) |
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|
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#define AD7998_CONV_RES_REG 0x0 |
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#define AD7998_ALERT_STAT_REG 0x1 |
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#define AD7998_CONF_REG 0x2 |
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#define AD7998_CYCLE_TMR_REG 0x3 |
|
|
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#define AD7998_DATALOW_REG(x) ((x) * 3 + 0x4) |
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#define AD7998_DATAHIGH_REG(x) ((x) * 3 + 0x5) |
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#define AD7998_HYST_REG(x) ((x) * 3 + 0x6) |
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|
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#define AD7998_CYC_MASK GENMASK(2, 0) |
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#define AD7998_CYC_DIS 0x0 |
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#define AD7998_CYC_TCONF_32 0x1 |
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#define AD7998_CYC_TCONF_64 0x2 |
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#define AD7998_CYC_TCONF_128 0x3 |
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#define AD7998_CYC_TCONF_256 0x4 |
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#define AD7998_CYC_TCONF_512 0x5 |
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#define AD7998_CYC_TCONF_1024 0x6 |
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#define AD7998_CYC_TCONF_2048 0x7 |
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|
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#define AD7998_ALERT_STAT_CLEAR 0xFF |
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|
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/* |
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* AD7997 and AD7997 defines |
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*/ |
|
|
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#define AD7997_8_READ_SINGLE BIT(7) |
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#define AD7997_8_READ_SEQUENCE (BIT(6) | BIT(5) | BIT(4)) |
|
|
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enum { |
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ad7991, |
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ad7995, |
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ad7999, |
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ad7992, |
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ad7993, |
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ad7994, |
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ad7997, |
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ad7998 |
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}; |
|
|
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/** |
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* struct ad799x_chip_config - chip specific information |
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* @channel: channel specification |
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* @default_config: device default configuration |
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* @info: pointer to iio_info struct |
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*/ |
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struct ad799x_chip_config { |
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const struct iio_chan_spec channel[9]; |
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u16 default_config; |
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const struct iio_info *info; |
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}; |
|
|
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/** |
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* struct ad799x_chip_info - chip specific information |
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* @num_channels: number of channels |
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* @noirq_config: device configuration w/o IRQ |
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* @irq_config: device configuration w/IRQ |
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*/ |
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struct ad799x_chip_info { |
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int num_channels; |
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const struct ad799x_chip_config noirq_config; |
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const struct ad799x_chip_config irq_config; |
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}; |
|
|
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struct ad799x_state { |
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struct i2c_client *client; |
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const struct ad799x_chip_config *chip_config; |
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struct regulator *reg; |
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struct regulator *vref; |
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unsigned id; |
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u16 config; |
|
|
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u8 *rx_buf; |
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unsigned int transfer_size; |
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}; |
|
|
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static int ad799x_write_config(struct ad799x_state *st, u16 val) |
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{ |
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switch (st->id) { |
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case ad7997: |
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case ad7998: |
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return i2c_smbus_write_word_swapped(st->client, AD7998_CONF_REG, |
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val); |
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case ad7992: |
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case ad7993: |
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case ad7994: |
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return i2c_smbus_write_byte_data(st->client, AD7998_CONF_REG, |
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val); |
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default: |
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/* Will be written when doing a conversion */ |
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st->config = val; |
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return 0; |
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} |
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} |
|
|
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static int ad799x_read_config(struct ad799x_state *st) |
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{ |
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switch (st->id) { |
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case ad7997: |
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case ad7998: |
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return i2c_smbus_read_word_swapped(st->client, AD7998_CONF_REG); |
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case ad7992: |
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case ad7993: |
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case ad7994: |
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return i2c_smbus_read_byte_data(st->client, AD7998_CONF_REG); |
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default: |
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/* No readback support */ |
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return st->config; |
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} |
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} |
|
|
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static int ad799x_update_config(struct ad799x_state *st, u16 config) |
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{ |
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int ret; |
|
|
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ret = ad799x_write_config(st, config); |
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if (ret < 0) |
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return ret; |
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ret = ad799x_read_config(st); |
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if (ret < 0) |
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return ret; |
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st->config = ret; |
|
|
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return 0; |
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} |
|
|
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static irqreturn_t ad799x_trigger_handler(int irq, void *p) |
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{ |
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struct iio_poll_func *pf = p; |
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struct iio_dev *indio_dev = pf->indio_dev; |
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struct ad799x_state *st = iio_priv(indio_dev); |
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int b_sent; |
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u8 cmd; |
|
|
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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 | |
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(*indio_dev->active_scan_mask << 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 = (*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT) | |
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AD7998_CONV_RES_REG; |
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break; |
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case ad7997: |
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case ad7998: |
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cmd = AD7997_8_READ_SEQUENCE | AD7998_CONV_RES_REG; |
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break; |
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default: |
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cmd = 0; |
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} |
|
|
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b_sent = i2c_smbus_read_i2c_block_data(st->client, |
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cmd, st->transfer_size, st->rx_buf); |
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if (b_sent < 0) |
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goto out; |
|
|
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iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf, |
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iio_get_time_ns(indio_dev)); |
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out: |
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iio_trigger_notify_done(indio_dev->trig); |
|
|
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return IRQ_HANDLED; |
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} |
|
|
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static int ad799x_update_scan_mode(struct iio_dev *indio_dev, |
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const unsigned long *scan_mask) |
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{ |
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struct ad799x_state *st = iio_priv(indio_dev); |
|
|
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kfree(st->rx_buf); |
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st->rx_buf = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); |
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if (!st->rx_buf) |
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return -ENOMEM; |
|
|
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st->transfer_size = bitmap_weight(scan_mask, indio_dev->masklength) * 2; |
|
|
|
switch (st->id) { |
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case ad7992: |
|
case ad7993: |
|
case ad7994: |
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case ad7997: |
|
case ad7998: |
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st->config &= ~(GENMASK(7, 0) << AD799X_CHANNEL_SHIFT); |
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st->config |= (*scan_mask << AD799X_CHANNEL_SHIFT); |
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return ad799x_write_config(st, st->config); |
|
default: |
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return 0; |
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} |
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} |
|
|
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static int ad799x_scan_direct(struct ad799x_state *st, unsigned ch) |
|
{ |
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u8 cmd; |
|
|
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switch (st->id) { |
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case ad7991: |
|
case ad7995: |
|
case ad7999: |
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cmd = st->config | (BIT(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 = BIT(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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return i2c_smbus_read_word_swapped(st->client, cmd); |
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} |
|
|
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static int ad799x_read_raw(struct iio_dev *indio_dev, |
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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(indio_dev); |
|
|
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switch (m) { |
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case IIO_CHAN_INFO_RAW: |
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ret = iio_device_claim_direct_mode(indio_dev); |
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if (ret) |
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return ret; |
|
ret = ad799x_scan_direct(st, chan->scan_index); |
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iio_device_release_direct_mode(indio_dev); |
|
|
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if (ret < 0) |
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return ret; |
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*val = (ret >> chan->scan_type.shift) & |
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GENMASK(chan->scan_type.realbits - 1, 0); |
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return IIO_VAL_INT; |
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case IIO_CHAN_INFO_SCALE: |
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ret = regulator_get_voltage(st->vref); |
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if (ret < 0) |
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return ret; |
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*val = ret / 1000; |
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*val2 = chan->scan_type.realbits; |
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return IIO_VAL_FRACTIONAL_LOG2; |
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} |
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return -EINVAL; |
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} |
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static const unsigned int ad7998_frequencies[] = { |
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[AD7998_CYC_DIS] = 0, |
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[AD7998_CYC_TCONF_32] = 15625, |
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[AD7998_CYC_TCONF_64] = 7812, |
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[AD7998_CYC_TCONF_128] = 3906, |
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[AD7998_CYC_TCONF_512] = 976, |
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[AD7998_CYC_TCONF_1024] = 488, |
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[AD7998_CYC_TCONF_2048] = 244, |
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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 *indio_dev = dev_to_iio_dev(dev); |
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struct ad799x_state *st = iio_priv(indio_dev); |
|
|
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int ret = i2c_smbus_read_byte_data(st->client, AD7998_CYCLE_TMR_REG); |
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if (ret < 0) |
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return ret; |
|
|
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return sprintf(buf, "%u\n", ad7998_frequencies[ret & AD7998_CYC_MASK]); |
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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 *indio_dev = dev_to_iio_dev(dev); |
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struct ad799x_state *st = iio_priv(indio_dev); |
|
|
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long val; |
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int ret, i; |
|
|
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ret = kstrtol(buf, 10, &val); |
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if (ret) |
|
return ret; |
|
|
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mutex_lock(&indio_dev->mlock); |
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ret = i2c_smbus_read_byte_data(st->client, AD7998_CYCLE_TMR_REG); |
|
if (ret < 0) |
|
goto error_ret_mutex; |
|
/* Wipe the bits clean */ |
|
ret &= ~AD7998_CYC_MASK; |
|
|
|
for (i = 0; i < ARRAY_SIZE(ad7998_frequencies); i++) |
|
if (val == ad7998_frequencies[i]) |
|
break; |
|
if (i == ARRAY_SIZE(ad7998_frequencies)) { |
|
ret = -EINVAL; |
|
goto error_ret_mutex; |
|
} |
|
|
|
ret = i2c_smbus_write_byte_data(st->client, AD7998_CYCLE_TMR_REG, |
|
ret | i); |
|
if (ret < 0) |
|
goto error_ret_mutex; |
|
ret = len; |
|
|
|
error_ret_mutex: |
|
mutex_unlock(&indio_dev->mlock); |
|
|
|
return ret; |
|
} |
|
|
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static int ad799x_read_event_config(struct iio_dev *indio_dev, |
|
const struct iio_chan_spec *chan, |
|
enum iio_event_type type, |
|
enum iio_event_direction dir) |
|
{ |
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struct ad799x_state *st = iio_priv(indio_dev); |
|
|
|
if (!(st->config & AD7998_ALERT_EN)) |
|
return 0; |
|
|
|
if ((st->config >> AD799X_CHANNEL_SHIFT) & BIT(chan->scan_index)) |
|
return 1; |
|
|
|
return 0; |
|
} |
|
|
|
static int ad799x_write_event_config(struct iio_dev *indio_dev, |
|
const struct iio_chan_spec *chan, |
|
enum iio_event_type type, |
|
enum iio_event_direction dir, |
|
int state) |
|
{ |
|
struct ad799x_state *st = iio_priv(indio_dev); |
|
int ret; |
|
|
|
ret = iio_device_claim_direct_mode(indio_dev); |
|
if (ret) |
|
return ret; |
|
|
|
if (state) |
|
st->config |= BIT(chan->scan_index) << AD799X_CHANNEL_SHIFT; |
|
else |
|
st->config &= ~(BIT(chan->scan_index) << AD799X_CHANNEL_SHIFT); |
|
|
|
if (st->config >> AD799X_CHANNEL_SHIFT) |
|
st->config |= AD7998_ALERT_EN; |
|
else |
|
st->config &= ~AD7998_ALERT_EN; |
|
|
|
ret = ad799x_write_config(st, st->config); |
|
iio_device_release_direct_mode(indio_dev); |
|
return ret; |
|
} |
|
|
|
static unsigned int ad799x_threshold_reg(const struct iio_chan_spec *chan, |
|
enum iio_event_direction dir, |
|
enum iio_event_info info) |
|
{ |
|
switch (info) { |
|
case IIO_EV_INFO_VALUE: |
|
if (dir == IIO_EV_DIR_FALLING) |
|
return AD7998_DATALOW_REG(chan->channel); |
|
else |
|
return AD7998_DATAHIGH_REG(chan->channel); |
|
case IIO_EV_INFO_HYSTERESIS: |
|
return AD7998_HYST_REG(chan->channel); |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ad799x_write_event_value(struct iio_dev *indio_dev, |
|
const struct iio_chan_spec *chan, |
|
enum iio_event_type type, |
|
enum iio_event_direction dir, |
|
enum iio_event_info info, |
|
int val, int val2) |
|
{ |
|
int ret; |
|
struct ad799x_state *st = iio_priv(indio_dev); |
|
|
|
if (val < 0 || val > GENMASK(chan->scan_type.realbits - 1, 0)) |
|
return -EINVAL; |
|
|
|
mutex_lock(&indio_dev->mlock); |
|
ret = i2c_smbus_write_word_swapped(st->client, |
|
ad799x_threshold_reg(chan, dir, info), |
|
val << chan->scan_type.shift); |
|
mutex_unlock(&indio_dev->mlock); |
|
|
|
return ret; |
|
} |
|
|
|
static int ad799x_read_event_value(struct iio_dev *indio_dev, |
|
const struct iio_chan_spec *chan, |
|
enum iio_event_type type, |
|
enum iio_event_direction dir, |
|
enum iio_event_info info, |
|
int *val, int *val2) |
|
{ |
|
int ret; |
|
struct ad799x_state *st = iio_priv(indio_dev); |
|
|
|
mutex_lock(&indio_dev->mlock); |
|
ret = i2c_smbus_read_word_swapped(st->client, |
|
ad799x_threshold_reg(chan, dir, info)); |
|
mutex_unlock(&indio_dev->mlock); |
|
if (ret < 0) |
|
return ret; |
|
*val = (ret >> chan->scan_type.shift) & |
|
GENMASK(chan->scan_type.realbits - 1, 0); |
|
|
|
return IIO_VAL_INT; |
|
} |
|
|
|
static irqreturn_t ad799x_event_handler(int irq, void *private) |
|
{ |
|
struct iio_dev *indio_dev = private; |
|
struct ad799x_state *st = iio_priv(private); |
|
int i, ret; |
|
|
|
ret = i2c_smbus_read_byte_data(st->client, AD7998_ALERT_STAT_REG); |
|
if (ret <= 0) |
|
goto done; |
|
|
|
if (i2c_smbus_write_byte_data(st->client, AD7998_ALERT_STAT_REG, |
|
AD7998_ALERT_STAT_CLEAR) < 0) |
|
goto done; |
|
|
|
for (i = 0; i < 8; i++) { |
|
if (ret & BIT(i)) |
|
iio_push_event(indio_dev, |
|
i & 0x1 ? |
|
IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, |
|
(i >> 1), |
|
IIO_EV_TYPE_THRESH, |
|
IIO_EV_DIR_RISING) : |
|
IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, |
|
(i >> 1), |
|
IIO_EV_TYPE_THRESH, |
|
IIO_EV_DIR_FALLING), |
|
iio_get_time_ns(indio_dev)); |
|
} |
|
|
|
done: |
|
return IRQ_HANDLED; |
|
} |
|
|
|
static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, |
|
ad799x_read_frequency, |
|
ad799x_write_frequency); |
|
static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("15625 7812 3906 1953 976 488 244 0"); |
|
|
|
static struct attribute *ad799x_event_attributes[] = { |
|
&iio_dev_attr_sampling_frequency.dev_attr.attr, |
|
&iio_const_attr_sampling_frequency_available.dev_attr.attr, |
|
NULL, |
|
}; |
|
|
|
static const struct attribute_group ad799x_event_attrs_group = { |
|
.attrs = ad799x_event_attributes, |
|
}; |
|
|
|
static const struct iio_info ad7991_info = { |
|
.read_raw = &ad799x_read_raw, |
|
.update_scan_mode = ad799x_update_scan_mode, |
|
}; |
|
|
|
static const struct iio_info ad7993_4_7_8_noirq_info = { |
|
.read_raw = &ad799x_read_raw, |
|
.update_scan_mode = ad799x_update_scan_mode, |
|
}; |
|
|
|
static const struct iio_info ad7993_4_7_8_irq_info = { |
|
.read_raw = &ad799x_read_raw, |
|
.event_attrs = &ad799x_event_attrs_group, |
|
.read_event_config = &ad799x_read_event_config, |
|
.write_event_config = &ad799x_write_event_config, |
|
.read_event_value = &ad799x_read_event_value, |
|
.write_event_value = &ad799x_write_event_value, |
|
.update_scan_mode = ad799x_update_scan_mode, |
|
}; |
|
|
|
static const struct iio_event_spec ad799x_events[] = { |
|
{ |
|
.type = IIO_EV_TYPE_THRESH, |
|
.dir = IIO_EV_DIR_RISING, |
|
.mask_separate = BIT(IIO_EV_INFO_VALUE) | |
|
BIT(IIO_EV_INFO_ENABLE), |
|
}, { |
|
.type = IIO_EV_TYPE_THRESH, |
|
.dir = IIO_EV_DIR_FALLING, |
|
.mask_separate = BIT(IIO_EV_INFO_VALUE) | |
|
BIT(IIO_EV_INFO_ENABLE), |
|
}, { |
|
.type = IIO_EV_TYPE_THRESH, |
|
.dir = IIO_EV_DIR_EITHER, |
|
.mask_separate = BIT(IIO_EV_INFO_HYSTERESIS), |
|
}, |
|
}; |
|
|
|
#define _AD799X_CHANNEL(_index, _realbits, _ev_spec, _num_ev_spec) { \ |
|
.type = IIO_VOLTAGE, \ |
|
.indexed = 1, \ |
|
.channel = (_index), \ |
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ |
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ |
|
.scan_index = (_index), \ |
|
.scan_type = { \ |
|
.sign = 'u', \ |
|
.realbits = (_realbits), \ |
|
.storagebits = 16, \ |
|
.shift = 12 - (_realbits), \ |
|
.endianness = IIO_BE, \ |
|
}, \ |
|
.event_spec = _ev_spec, \ |
|
.num_event_specs = _num_ev_spec, \ |
|
} |
|
|
|
#define AD799X_CHANNEL(_index, _realbits) \ |
|
_AD799X_CHANNEL(_index, _realbits, NULL, 0) |
|
|
|
#define AD799X_CHANNEL_WITH_EVENTS(_index, _realbits) \ |
|
_AD799X_CHANNEL(_index, _realbits, ad799x_events, \ |
|
ARRAY_SIZE(ad799x_events)) |
|
|
|
static const struct ad799x_chip_info ad799x_chip_info_tbl[] = { |
|
[ad7991] = { |
|
.num_channels = 5, |
|
.noirq_config = { |
|
.channel = { |
|
AD799X_CHANNEL(0, 12), |
|
AD799X_CHANNEL(1, 12), |
|
AD799X_CHANNEL(2, 12), |
|
AD799X_CHANNEL(3, 12), |
|
IIO_CHAN_SOFT_TIMESTAMP(4), |
|
}, |
|
.info = &ad7991_info, |
|
}, |
|
}, |
|
[ad7995] = { |
|
.num_channels = 5, |
|
.noirq_config = { |
|
.channel = { |
|
AD799X_CHANNEL(0, 10), |
|
AD799X_CHANNEL(1, 10), |
|
AD799X_CHANNEL(2, 10), |
|
AD799X_CHANNEL(3, 10), |
|
IIO_CHAN_SOFT_TIMESTAMP(4), |
|
}, |
|
.info = &ad7991_info, |
|
}, |
|
}, |
|
[ad7999] = { |
|
.num_channels = 5, |
|
.noirq_config = { |
|
.channel = { |
|
AD799X_CHANNEL(0, 8), |
|
AD799X_CHANNEL(1, 8), |
|
AD799X_CHANNEL(2, 8), |
|
AD799X_CHANNEL(3, 8), |
|
IIO_CHAN_SOFT_TIMESTAMP(4), |
|
}, |
|
.info = &ad7991_info, |
|
}, |
|
}, |
|
[ad7992] = { |
|
.num_channels = 3, |
|
.noirq_config = { |
|
.channel = { |
|
AD799X_CHANNEL(0, 12), |
|
AD799X_CHANNEL(1, 12), |
|
IIO_CHAN_SOFT_TIMESTAMP(3), |
|
}, |
|
.info = &ad7993_4_7_8_noirq_info, |
|
}, |
|
.irq_config = { |
|
.channel = { |
|
AD799X_CHANNEL_WITH_EVENTS(0, 12), |
|
AD799X_CHANNEL_WITH_EVENTS(1, 12), |
|
IIO_CHAN_SOFT_TIMESTAMP(3), |
|
}, |
|
.default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT, |
|
.info = &ad7993_4_7_8_irq_info, |
|
}, |
|
}, |
|
[ad7993] = { |
|
.num_channels = 5, |
|
.noirq_config = { |
|
.channel = { |
|
AD799X_CHANNEL(0, 10), |
|
AD799X_CHANNEL(1, 10), |
|
AD799X_CHANNEL(2, 10), |
|
AD799X_CHANNEL(3, 10), |
|
IIO_CHAN_SOFT_TIMESTAMP(4), |
|
}, |
|
.info = &ad7993_4_7_8_noirq_info, |
|
}, |
|
.irq_config = { |
|
.channel = { |
|
AD799X_CHANNEL_WITH_EVENTS(0, 10), |
|
AD799X_CHANNEL_WITH_EVENTS(1, 10), |
|
AD799X_CHANNEL_WITH_EVENTS(2, 10), |
|
AD799X_CHANNEL_WITH_EVENTS(3, 10), |
|
IIO_CHAN_SOFT_TIMESTAMP(4), |
|
}, |
|
.default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT, |
|
.info = &ad7993_4_7_8_irq_info, |
|
}, |
|
}, |
|
[ad7994] = { |
|
.num_channels = 5, |
|
.noirq_config = { |
|
.channel = { |
|
AD799X_CHANNEL(0, 12), |
|
AD799X_CHANNEL(1, 12), |
|
AD799X_CHANNEL(2, 12), |
|
AD799X_CHANNEL(3, 12), |
|
IIO_CHAN_SOFT_TIMESTAMP(4), |
|
}, |
|
.info = &ad7993_4_7_8_noirq_info, |
|
}, |
|
.irq_config = { |
|
.channel = { |
|
AD799X_CHANNEL_WITH_EVENTS(0, 12), |
|
AD799X_CHANNEL_WITH_EVENTS(1, 12), |
|
AD799X_CHANNEL_WITH_EVENTS(2, 12), |
|
AD799X_CHANNEL_WITH_EVENTS(3, 12), |
|
IIO_CHAN_SOFT_TIMESTAMP(4), |
|
}, |
|
.default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT, |
|
.info = &ad7993_4_7_8_irq_info, |
|
}, |
|
}, |
|
[ad7997] = { |
|
.num_channels = 9, |
|
.noirq_config = { |
|
.channel = { |
|
AD799X_CHANNEL(0, 10), |
|
AD799X_CHANNEL(1, 10), |
|
AD799X_CHANNEL(2, 10), |
|
AD799X_CHANNEL(3, 10), |
|
AD799X_CHANNEL(4, 10), |
|
AD799X_CHANNEL(5, 10), |
|
AD799X_CHANNEL(6, 10), |
|
AD799X_CHANNEL(7, 10), |
|
IIO_CHAN_SOFT_TIMESTAMP(8), |
|
}, |
|
.info = &ad7993_4_7_8_noirq_info, |
|
}, |
|
.irq_config = { |
|
.channel = { |
|
AD799X_CHANNEL_WITH_EVENTS(0, 10), |
|
AD799X_CHANNEL_WITH_EVENTS(1, 10), |
|
AD799X_CHANNEL_WITH_EVENTS(2, 10), |
|
AD799X_CHANNEL_WITH_EVENTS(3, 10), |
|
AD799X_CHANNEL(4, 10), |
|
AD799X_CHANNEL(5, 10), |
|
AD799X_CHANNEL(6, 10), |
|
AD799X_CHANNEL(7, 10), |
|
IIO_CHAN_SOFT_TIMESTAMP(8), |
|
}, |
|
.default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT, |
|
.info = &ad7993_4_7_8_irq_info, |
|
}, |
|
}, |
|
[ad7998] = { |
|
.num_channels = 9, |
|
.noirq_config = { |
|
.channel = { |
|
AD799X_CHANNEL(0, 12), |
|
AD799X_CHANNEL(1, 12), |
|
AD799X_CHANNEL(2, 12), |
|
AD799X_CHANNEL(3, 12), |
|
AD799X_CHANNEL(4, 12), |
|
AD799X_CHANNEL(5, 12), |
|
AD799X_CHANNEL(6, 12), |
|
AD799X_CHANNEL(7, 12), |
|
IIO_CHAN_SOFT_TIMESTAMP(8), |
|
}, |
|
.info = &ad7993_4_7_8_noirq_info, |
|
}, |
|
.irq_config = { |
|
.channel = { |
|
AD799X_CHANNEL_WITH_EVENTS(0, 12), |
|
AD799X_CHANNEL_WITH_EVENTS(1, 12), |
|
AD799X_CHANNEL_WITH_EVENTS(2, 12), |
|
AD799X_CHANNEL_WITH_EVENTS(3, 12), |
|
AD799X_CHANNEL(4, 12), |
|
AD799X_CHANNEL(5, 12), |
|
AD799X_CHANNEL(6, 12), |
|
AD799X_CHANNEL(7, 12), |
|
IIO_CHAN_SOFT_TIMESTAMP(8), |
|
}, |
|
.default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT, |
|
.info = &ad7993_4_7_8_irq_info, |
|
}, |
|
}, |
|
}; |
|
|
|
static int ad799x_probe(struct i2c_client *client, |
|
const struct i2c_device_id *id) |
|
{ |
|
int ret; |
|
struct ad799x_state *st; |
|
struct iio_dev *indio_dev; |
|
const struct ad799x_chip_info *chip_info = |
|
&ad799x_chip_info_tbl[id->driver_data]; |
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, 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; |
|
if (client->irq > 0 && chip_info->irq_config.info) |
|
st->chip_config = &chip_info->irq_config; |
|
else |
|
st->chip_config = &chip_info->noirq_config; |
|
|
|
/* TODO: Add pdata options for filtering and bit delay */ |
|
|
|
st->reg = devm_regulator_get(&client->dev, "vcc"); |
|
if (IS_ERR(st->reg)) |
|
return PTR_ERR(st->reg); |
|
ret = regulator_enable(st->reg); |
|
if (ret) |
|
return ret; |
|
st->vref = devm_regulator_get(&client->dev, "vref"); |
|
if (IS_ERR(st->vref)) { |
|
ret = PTR_ERR(st->vref); |
|
goto error_disable_reg; |
|
} |
|
ret = regulator_enable(st->vref); |
|
if (ret) |
|
goto error_disable_reg; |
|
|
|
st->client = client; |
|
|
|
indio_dev->name = id->name; |
|
indio_dev->info = st->chip_config->info; |
|
|
|
indio_dev->modes = INDIO_DIRECT_MODE; |
|
indio_dev->channels = st->chip_config->channel; |
|
indio_dev->num_channels = chip_info->num_channels; |
|
|
|
ret = ad799x_update_config(st, st->chip_config->default_config); |
|
if (ret) |
|
goto error_disable_vref; |
|
|
|
ret = iio_triggered_buffer_setup(indio_dev, NULL, |
|
&ad799x_trigger_handler, NULL); |
|
if (ret) |
|
goto error_disable_vref; |
|
|
|
if (client->irq > 0) { |
|
ret = devm_request_threaded_irq(&client->dev, |
|
client->irq, |
|
NULL, |
|
ad799x_event_handler, |
|
IRQF_TRIGGER_FALLING | |
|
IRQF_ONESHOT, |
|
client->name, |
|
indio_dev); |
|
if (ret) |
|
goto error_cleanup_ring; |
|
} |
|
ret = iio_device_register(indio_dev); |
|
if (ret) |
|
goto error_cleanup_ring; |
|
|
|
return 0; |
|
|
|
error_cleanup_ring: |
|
iio_triggered_buffer_cleanup(indio_dev); |
|
error_disable_vref: |
|
regulator_disable(st->vref); |
|
error_disable_reg: |
|
regulator_disable(st->reg); |
|
|
|
return ret; |
|
} |
|
|
|
static int ad799x_remove(struct i2c_client *client) |
|
{ |
|
struct iio_dev *indio_dev = i2c_get_clientdata(client); |
|
struct ad799x_state *st = iio_priv(indio_dev); |
|
|
|
iio_device_unregister(indio_dev); |
|
|
|
iio_triggered_buffer_cleanup(indio_dev); |
|
regulator_disable(st->vref); |
|
regulator_disable(st->reg); |
|
kfree(st->rx_buf); |
|
|
|
return 0; |
|
} |
|
|
|
static int __maybe_unused ad799x_suspend(struct device *dev) |
|
{ |
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
|
struct ad799x_state *st = iio_priv(indio_dev); |
|
|
|
regulator_disable(st->vref); |
|
regulator_disable(st->reg); |
|
|
|
return 0; |
|
} |
|
|
|
static int __maybe_unused ad799x_resume(struct device *dev) |
|
{ |
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
|
struct ad799x_state *st = iio_priv(indio_dev); |
|
int ret; |
|
|
|
ret = regulator_enable(st->reg); |
|
if (ret) { |
|
dev_err(dev, "Unable to enable vcc regulator\n"); |
|
return ret; |
|
} |
|
ret = regulator_enable(st->vref); |
|
if (ret) { |
|
regulator_disable(st->reg); |
|
dev_err(dev, "Unable to enable vref regulator\n"); |
|
return ret; |
|
} |
|
|
|
/* resync config */ |
|
ret = ad799x_update_config(st, st->config); |
|
if (ret) { |
|
regulator_disable(st->vref); |
|
regulator_disable(st->reg); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static SIMPLE_DEV_PM_OPS(ad799x_pm_ops, ad799x_suspend, ad799x_resume); |
|
|
|
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", |
|
.pm = &ad799x_pm_ops, |
|
}, |
|
.probe = ad799x_probe, |
|
.remove = ad799x_remove, |
|
.id_table = ad799x_id, |
|
}; |
|
module_i2c_driver(ad799x_driver); |
|
|
|
MODULE_AUTHOR("Michael Hennerich <[email protected]>"); |
|
MODULE_DESCRIPTION("Analog Devices AD799x ADC"); |
|
MODULE_LICENSE("GPL v2");
|
|
|