linux/drivers/mfd/pcf50633-adc.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* NXP PCF50633 ADC Driver
 *
 * (C) 2006-2008 by Openmoko, Inc.
 * Author: Balaji Rao <[email protected]>
 * All rights reserved.
 *
 * Broken down from monstrous PCF50633 driver mainly by
 * Harald Welte, Andy Green and Werner Almesberger
 *
 *  NOTE: This driver does not yet support subtractive ADC mode, which means
 *  you can do only one measurement per read request.
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/completion.h>

#include <linux/mfd/pcf50633/core.h>
#include <linux/mfd/pcf50633/adc.h>

struct pcf50633_adc_request { … };

struct pcf50633_adc_sync_request { … };

#define PCF50633_MAX_ADC_FIFO_DEPTH …

struct pcf50633_adc { … };

static inline struct pcf50633_adc *__to_adc(struct pcf50633 *pcf)
{ … }

static void adc_setup(struct pcf50633 *pcf, int channel, int avg)
{ … }

static void trigger_next_adc_job_if_any(struct pcf50633 *pcf)
{ … }

static int
adc_enqueue_request(struct pcf50633 *pcf, struct pcf50633_adc_request *req)
{ … }

static void pcf50633_adc_sync_read_callback(struct pcf50633 *pcf, void *param,
	int result)
{ … }

int pcf50633_adc_sync_read(struct pcf50633 *pcf, int mux, int avg)
{ … }
EXPORT_SYMBOL_GPL(…);

int pcf50633_adc_async_read(struct pcf50633 *pcf, int mux, int avg,
			     void (*callback)(struct pcf50633 *, void *, int),
			     void *callback_param)
{ … }
EXPORT_SYMBOL_GPL(…);

static int adc_result(struct pcf50633 *pcf)
{ … }

static void pcf50633_adc_irq(int irq, void *data)
{ … }

static int pcf50633_adc_probe(struct platform_device *pdev)
{ … }

static void pcf50633_adc_remove(struct platform_device *pdev)
{ … }

static struct platform_driver pcf50633_adc_driver = …;

module_platform_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
MODULE_ALIAS(…) …;