ad74115.c

/* 5.10 compatibility */
#include <linux/regulator/driver.h>
#include "../../../drivers/regulator/internal.h"

struct regulator_bulk_devres {
	struct regulator_bulk_data *consumers;
	int num_consumers;
};

static int devm_regulator_bulk_match(struct device *dev, void *res,
				     void *data)
{
	struct regulator_bulk_devres *match = res;
	struct regulator_bulk_data *target = data;

	/*
	 * We check the put uses same consumer list as the get did.
	 * We _could_ scan all entries in consumer array and check the
	 * regulators match but ATM I don't see the need. We can change this
	 * later if needed.
	 */
	return match->consumers == target;
}

static void devm_regulator_bulk_release(struct device *dev, void *res)
{
	struct regulator_bulk_devres *devres = res;

	regulator_bulk_free(devres->num_consumers, devres->consumers);
}

static void devm_regulator_bulk_disable(void *res)
{
	struct regulator_bulk_devres *devres = res;
	int i;

	for (i = 0; i < devres->num_consumers; i++)
		regulator_disable(devres->consumers[i].consumer);
}

/**
 * devm_regulator_bulk_put - Resource managed regulator_bulk_put()
 * @consumers: consumers to free
 *
 * Deallocate regulators allocated with devm_regulator_bulk_get(). Normally
 * this function will not need to be called and the resource management
 * code will ensure that the resource is freed.
 */
static
void devm_regulator_bulk_put(struct regulator_bulk_data *consumers)
{
	int rc;
	struct regulator *regulator = consumers[0].consumer;

	rc = devres_release(regulator->dev, devm_regulator_bulk_release,
			    devm_regulator_bulk_match, consumers);
	if (rc != 0)
		WARN_ON(rc);
}

/**
 * devm_regulator_bulk_get_enable - managed get'n enable multiple regulators
 *
 * @dev:           device to supply
 * @num_consumers: number of consumers to register
 * @id:            list of supply names or regulator IDs
 *
 * @return 0 on success, an errno on failure.
 *
 * This helper function allows drivers to get several regulator
 * consumers in one operation with management, the regulators will
 * automatically be freed when the device is unbound.  If any of the
 * regulators cannot be acquired then any regulators that were
 * allocated will be freed before returning to the caller.
 */
static
int devm_regulator_bulk_get_enable(struct device *dev, int num_consumers,
				   const char * const *id)
{
	struct regulator_bulk_devres *devres;
	struct regulator_bulk_data *consumers;
	int i, ret;

	devres = devm_kmalloc(dev, sizeof(*devres), GFP_KERNEL);
	if (!devres)
		return -ENOMEM;

	devres->consumers = devm_kcalloc(dev, num_consumers, sizeof(*consumers),
					 GFP_KERNEL);
	consumers = devres->consumers;
	if (!consumers)
		return -ENOMEM;

	devres->num_consumers = num_consumers;

	for (i = 0; i < num_consumers; i++)
		consumers[i].supply = id[i];

	ret = devm_regulator_bulk_get(dev, num_consumers, consumers);
	if (ret)
		return ret;

	for (i = 0; i < num_consumers; i++) {
		ret = regulator_enable(consumers[i].consumer);
		if (ret)
			goto unwind;
	}

	ret = devm_add_action(dev, devm_regulator_bulk_disable, devres);
	if (!ret)
		return 0;

unwind:
	while (--i >= 0)
		regulator_disable(consumers[i].consumer);

	devm_regulator_bulk_put(consumers);

	return ret;
}

static int iio_device_id(struct iio_dev *indio_dev)
{
	return indio_dev->id;
}

#include <linux/slab.h>
#define IIO_DMA_MINALIGN ARCH_KMALLOC_MINALIGN
/* end 5.10 compatibility */