linux-imx

/*

 * Linux I2C core OF support code

 *

 * Copyright (C) 2008 Jochen Friedrich <jochen@scram.de>

 * based on a previous patch from Jon Smirl <jonsmirl@gmail.com>

 *

 * Copyright (C) 2013, 2018 Wolfram Sang <wsa@the-dreams.de>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License as published by the Free

 * Software Foundation; either version 2 of the License, or (at your option)

 * any later version.

 */

​

#include <dt-bindings/i2c/i2c.h>

#include <linux/device.h>

#include <linux/err.h>

#include <linux/i2c.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/of_device.h>

​

#include "i2c-core.h"

​

int of_i2c_get_board_info(struct device *dev, struct device_node *node,

              struct i2c_board_info *info)

{

    u32 addr;

    int ret;

​

    memset(info, 0, sizeof(*info));

​

    if (of_modalias_node(node, info->type, sizeof(info->type)) < 0) {

        dev_err(dev, "of_i2c: modalias failure on %pOF\n", node);

        return -EINVAL;

    }

​

    ret = of_property_read_u32(node, "reg", &addr);

    if (ret) {

        dev_err(dev, "of_i2c: invalid reg on %pOF\n", node);

        return ret;

    }

​

    if (addr & I2C_TEN_BIT_ADDRESS) {

        addr &= ~I2C_TEN_BIT_ADDRESS;

        info->flags |= I2C_CLIENT_TEN;

    }

​

    if (addr & I2C_OWN_SLAVE_ADDRESS) {

        addr &= ~I2C_OWN_SLAVE_ADDRESS;

        info->flags |= I2C_CLIENT_SLAVE;

    }

​

    info->addr = addr;

    info->of_node = node;

​

    if (of_property_read_bool(node, "host-notify"))

        info->flags |= I2C_CLIENT_HOST_NOTIFY;

​

    if (of_get_property(node, "wakeup-source", NULL))

        info->flags |= I2C_CLIENT_WAKE;

​

    return 0;