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Commit 396590b3 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Jonathan Cameron
Browse files

staging:iio:ad799x: Move ring functions to the main file 



The ad799x_ring.c file is pretty much only one function these days. No need to
keep it in a separate file. Since there is then only one user of the header left
also move everything from the header to the main file.

Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Acked-by: default avatarHartmut Knaack <knaack.h@gmx.de>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 476d4af2

drivers/staging/iio/adc/Kconfig

+2 −11
Original line number Diff line number Diff line
@@ -40,23 +40,14 @@ config AD7606_IFACE_SPI 
config AD799X

	tristate "Analog Devices AD799x ADC driver"

	depends on I2C

	select IIO_TRIGGER if IIO_BUFFER

	select AD799X_RING_BUFFER

	select IIO_BUFFER

	select IIO_TRIGGERED_BUFFER

	help

	  Say yes here to build support for Analog Devices:

	  ad7991, ad7995, ad7999, ad7992, ad7993, ad7994, ad7997, ad7998

	  i2c analog to digital converters (ADC). Provides direct access

	  via sysfs.



config AD799X_RING_BUFFER

	bool "Analog Devices AD799x: use ring buffer"

	depends on AD799X

	select IIO_BUFFER

	select IIO_TRIGGERED_BUFFER

	help

	  Say yes here to include ring buffer support in the AD799X

	  ADC driver.



config AD7780

	tristate "Analog Devices AD7780 and similar ADCs driver"

	depends on SPI

drivers/staging/iio/adc/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -9,7 +9,6 @@ ad7606-$(CONFIG_AD7606_IFACE_SPI) += ad7606_spi.o 
obj-$(CONFIG_AD7606) += ad7606.o



ad799x-y := ad799x_core.o

ad799x-$(CONFIG_AD799X_RING_BUFFER) += ad799x_ring.o

obj-$(CONFIG_AD799X) += ad799x.o



obj-$(CONFIG_AD7291) += ad7291.o

drivers/staging/iio/adc/ad799x.h

deleted100644 → 0
+0 −121
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.

 * Copyright (C) 2008-2010 Jonathan Cameron

 *

 * 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.

 *

 * ad799x.h

 */



#ifndef _AD799X_H_

#define  _AD799X_H_



#define AD799X_CHANNEL_SHIFT			4

#define AD799X_STORAGEBITS			16

/*

 * AD7991, AD7995 and AD7999 defines

 */



#define AD7991_REF_SEL				0x08

#define AD7991_FLTR				0x04

#define AD7991_BIT_TRIAL_DELAY			0x02

#define AD7991_SAMPLE_DELAY			0x01



/*

 * AD7992, AD7993, AD7994, AD7997 and AD7998 defines

 */



#define AD7998_FLTR				0x08

#define AD7998_ALERT_EN				0x04

#define AD7998_BUSY_ALERT			0x02

#define AD7998_BUSY_ALERT_POL			0x01



#define AD7998_CONV_RES_REG			0x0

#define AD7998_ALERT_STAT_REG			0x1

#define AD7998_CONF_REG				0x2

#define AD7998_CYCLE_TMR_REG			0x3



#define AD7998_DATALOW_REG(x)			((x) * 3 + 0x4)

#define AD7998_DATAHIGH_REG(x)			((x) * 3 + 0x5)

#define AD7998_HYST_REG(x)			((x) * 3 + 0x6)



#define AD7998_CYC_MASK				0x7

#define AD7998_CYC_DIS				0x0

#define AD7998_CYC_TCONF_32			0x1

#define AD7998_CYC_TCONF_64			0x2

#define AD7998_CYC_TCONF_128			0x3

#define AD7998_CYC_TCONF_256			0x4

#define AD7998_CYC_TCONF_512			0x5

#define AD7998_CYC_TCONF_1024			0x6

#define AD7998_CYC_TCONF_2048			0x7



#define AD7998_ALERT_STAT_CLEAR			0xFF



/*

 * AD7997 and AD7997 defines

 */



#define AD7997_8_READ_SINGLE			0x80

#define AD7997_8_READ_SEQUENCE			0x70

/* TODO: move this into a common header */

#define RES_MASK(bits)	((1 << (bits)) - 1)



enum {

	ad7991,

	ad7995,

	ad7999,

	ad7992,

	ad7993,

	ad7994,

	ad7997,

	ad7998

};



struct ad799x_state;



/**

 * struct ad799x_chip_info - chip specifc information

 * @channel:		channel specification

 * @num_channels:	number of channels

 * @monitor_mode:	whether the chip supports monitor interrupts

 * @default_config:	device default configuration

 * @event_attrs:	pointer to the monitor event attribute group

 */



struct ad799x_chip_info {

	struct iio_chan_spec		channel[9];

	int				num_channels;

	u16				default_config;

	const struct iio_info		*info;

};



struct ad799x_state {

	struct i2c_client		*client;

	const struct ad799x_chip_info	*chip_info;

	struct regulator		*reg;

	struct regulator		*vref;

	unsigned			id;

	u16				config;



	u8				*rx_buf;

	unsigned int			transfer_size;

};



#ifdef CONFIG_AD799X_RING_BUFFER

int ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev);

void ad799x_ring_cleanup(struct iio_dev *indio_dev);

#else /* CONFIG_AD799X_RING_BUFFER */



static inline int

ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev)

{

	return 0;

}



static inline void ad799x_ring_cleanup(struct iio_dev *indio_dev)

{

}

#endif /* CONFIG_AD799X_RING_BUFFER */

#endif /* _AD799X_H_ */

drivers/staging/iio/adc/ad799x_core.c

+141 −4
Original line number Diff line number Diff line
@@ -37,8 +37,144 @@ 
#include <linux/iio/sysfs.h>

#include <linux/iio/events.h>

#include <linux/iio/buffer.h>

#include <linux/iio/trigger_consumer.h>

#include <linux/iio/triggered_buffer.h>



#include "ad799x.h"

#define AD799X_CHANNEL_SHIFT			4

#define AD799X_STORAGEBITS			16

/*

 * AD7991, AD7995 and AD7999 defines

 */



#define AD7991_REF_SEL				0x08

#define AD7991_FLTR				0x04

#define AD7991_BIT_TRIAL_DELAY			0x02

#define AD7991_SAMPLE_DELAY			0x01



/*

 * AD7992, AD7993, AD7994, AD7997 and AD7998 defines

 */



#define AD7998_FLTR				0x08

#define AD7998_ALERT_EN				0x04

#define AD7998_BUSY_ALERT			0x02

#define AD7998_BUSY_ALERT_POL			0x01



#define AD7998_CONV_RES_REG			0x0

#define AD7998_ALERT_STAT_REG			0x1

#define AD7998_CONF_REG				0x2

#define AD7998_CYCLE_TMR_REG			0x3



#define AD7998_DATALOW_REG(x)			((x) * 3 + 0x4)

#define AD7998_DATAHIGH_REG(x)			((x) * 3 + 0x5)

#define AD7998_HYST_REG(x)			((x) * 3 + 0x6)



#define AD7998_CYC_MASK				0x7

#define AD7998_CYC_DIS				0x0

#define AD7998_CYC_TCONF_32			0x1

#define AD7998_CYC_TCONF_64			0x2

#define AD7998_CYC_TCONF_128			0x3

#define AD7998_CYC_TCONF_256			0x4

#define AD7998_CYC_TCONF_512			0x5

#define AD7998_CYC_TCONF_1024			0x6

#define AD7998_CYC_TCONF_2048			0x7



#define AD7998_ALERT_STAT_CLEAR			0xFF



/*

 * AD7997 and AD7997 defines

 */



#define AD7997_8_READ_SINGLE			0x80

#define AD7997_8_READ_SEQUENCE			0x70

/* TODO: move this into a common header */

#define RES_MASK(bits)	((1 << (bits)) - 1)



enum {

	ad7991,

	ad7995,

	ad7999,

	ad7992,

	ad7993,

	ad7994,

	ad7997,

	ad7998

};



/**

 * struct ad799x_chip_info - chip specifc information

 * @channel:		channel specification

 * @num_channels:	number of channels

 * @monitor_mode:	whether the chip supports monitor interrupts

 * @default_config:	device default configuration

 * @event_attrs:	pointer to the monitor event attribute group

 */

struct ad799x_chip_info {

	struct iio_chan_spec		channel[9];

	int				num_channels;

	u16				default_config;

	const struct iio_info		*info;

};



struct ad799x_state {

	struct i2c_client		*client;

	const struct ad799x_chip_info	*chip_info;

	struct regulator		*reg;

	struct regulator		*vref;

	unsigned			id;

	u16				config;



	u8				*rx_buf;

	unsigned int			transfer_size;

};



/**

 * ad799x_trigger_handler() bh of trigger launched polling to ring buffer

 *

 * Currently there is no option in this driver to disable the saving of

 * timestamps within the ring.

 **/

static irqreturn_t ad799x_trigger_handler(int irq, void *p)

{

	struct iio_poll_func *pf = p;

	struct iio_dev *indio_dev = pf->indio_dev;

	struct ad799x_state *st = iio_priv(indio_dev);

	int b_sent;

	u8 cmd;



	switch (st->id) {

	case ad7991:

	case ad7995:

	case ad7999:

		cmd = st->config |

			(*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT);

		break;

	case ad7992:

	case ad7993:

	case ad7994:

		cmd = (*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT) |

			AD7998_CONV_RES_REG;

		break;

	case ad7997:

	case ad7998:

		cmd = AD7997_8_READ_SEQUENCE | AD7998_CONV_RES_REG;

		break;

	default:

		cmd = 0;

	}



	b_sent = i2c_smbus_read_i2c_block_data(st->client,

			cmd, st->transfer_size, st->rx_buf);

	if (b_sent < 0)

		goto out;



	iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf,

			iio_get_time_ns());

out:

	iio_trigger_notify_done(indio_dev->trig);



	return IRQ_HANDLED;

}



/*

 * ad799x register access by I2C
@@ -578,7 +714,8 @@ static int ad799x_probe(struct i2c_client *client, 
	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);

	ret = iio_triggered_buffer_setup(indio_dev, NULL,

		&ad799x_trigger_handler, NULL);

	if (ret)

		goto error_disable_reg;
@@ -601,7 +738,7 @@ static int ad799x_probe(struct i2c_client *client, 
	return 0;



error_cleanup_ring:

	ad799x_ring_cleanup(indio_dev);

	iio_triggered_buffer_cleanup(indio_dev);

error_disable_reg:

	if (!IS_ERR(st->vref))

		regulator_disable(st->vref);
@@ -618,7 +755,7 @@ static int ad799x_remove(struct i2c_client *client) 


	iio_device_unregister(indio_dev);



	ad799x_ring_cleanup(indio_dev);

	iio_triggered_buffer_cleanup(indio_dev);

	if (!IS_ERR(st->vref))

		regulator_disable(st->vref);

	if (!IS_ERR(st->reg))

drivers/staging/iio/adc/ad799x_ring.c

deleted100644 → 0
+0 −84
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2010-2012 Michael Hennerich, Analog Devices Inc.

 * Copyright (C) 2008-2010 Jonathan Cameron

 *

 * 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.

 *

 * ad799x_ring.c

 */



#include <linux/interrupt.h>

#include <linux/slab.h>

#include <linux/kernel.h>

#include <linux/list.h>

#include <linux/i2c.h>

#include <linux/bitops.h>



#include <linux/iio/iio.h>

#include <linux/iio/buffer.h>

#include <linux/iio/trigger_consumer.h>

#include <linux/iio/triggered_buffer.h>



#include "ad799x.h"



/**

 * ad799x_trigger_handler() bh of trigger launched polling to ring buffer

 *

 * Currently there is no option in this driver to disable the saving of

 * timestamps within the ring.

 **/



static irqreturn_t ad799x_trigger_handler(int irq, void *p)

{

	struct iio_poll_func *pf = p;

	struct iio_dev *indio_dev = pf->indio_dev;

	struct ad799x_state *st = iio_priv(indio_dev);

	int b_sent;

	u8 cmd;



	switch (st->id) {

	case ad7991:

	case ad7995:

	case ad7999:

		cmd = st->config |

			(*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT);

		break;

	case ad7992:

	case ad7993:

	case ad7994:

		cmd = (*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT) |

			AD7998_CONV_RES_REG;

		break;

	case ad7997:

	case ad7998:

		cmd = AD7997_8_READ_SEQUENCE | AD7998_CONV_RES_REG;

		break;

	default:

		cmd = 0;

	}



	b_sent = i2c_smbus_read_i2c_block_data(st->client,

			cmd, st->transfer_size, st->rx_buf);

	if (b_sent < 0)

		goto out;



	iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf,

			iio_get_time_ns());

out:

	iio_trigger_notify_done(indio_dev->trig);



	return IRQ_HANDLED;

}



int ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev)

{

	return iio_triggered_buffer_setup(indio_dev, NULL,

		&ad799x_trigger_handler, NULL);

}



void ad799x_ring_cleanup(struct iio_dev *indio_dev)

{

	iio_triggered_buffer_cleanup(indio_dev);

}