u-boot/drivers/spmi/spmi-uclass.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * SPMI bus uclass driver
 *
 * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
 */

#define LOG_CATEGORY UCLASS_SPMI

#include <common.h>
#include <dm.h>
#include <errno.h>
#include <spmi/spmi.h>
#include <linux/ctype.h>

int spmi_reg_read(struct udevice *dev, int usid, int pid, int reg)
{
	const struct dm_spmi_ops *ops = dev_get_driver_ops(dev);

	if (!ops || !ops->read)
		return -ENOSYS;

	return ops->read(dev, usid, pid, reg);
}

int spmi_reg_write(struct udevice *dev, int usid, int pid, int reg,
		   uint8_t value)
{
	const struct dm_spmi_ops *ops = dev_get_driver_ops(dev);

	if (!ops || !ops->write)
		return -ENOSYS;

	return ops->write(dev, usid, pid, reg, value);
}

UCLASS_DRIVER(spmi) = {
	.id		= UCLASS_SPMI,
	.name		= "spmi",
	.post_bind	= dm_scan_fdt_dev,
};