LXR uboot/drivers/i2c/cros_ec

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (c) 2015 Google, Inc
   4 * Written by Simon Glass <sjg@chromium.org>
   5 */
   6
   7#include <common.h>
   8#include <dm.h>
   9#include <cros_ec.h>
  10#include <errno.h>
  11#include <i2c.h>
  12#include <asm/global_data.h>
  13
  14DECLARE_GLOBAL_DATA_PTR;
  15
  16struct cros_ec_i2c_bus {
  17        int remote_bus;
  18};
  19
  20static int cros_ec_i2c_set_bus_speed(struct udevice *dev, unsigned int speed)
  21{
  22        return 0;
  23}
  24
  25static int cros_ec_i2c_xfer(struct udevice *dev, struct i2c_msg *msg,
  26                            int nmsgs)
  27{
  28        struct cros_ec_i2c_bus *i2c_bus = dev_get_priv(dev);
  29
  30        return cros_ec_i2c_tunnel(dev->parent, i2c_bus->remote_bus, msg, nmsgs);
  31}
  32
  33static int cros_ec_i2c_of_to_plat(struct udevice *dev)
  34{
  35        struct cros_ec_i2c_bus *i2c_bus = dev_get_priv(dev);
  36        const void *blob = gd->fdt_blob;
  37        int node = dev_of_offset(dev);
  38
  39        i2c_bus->remote_bus = fdtdec_get_uint(blob, node, "google,remote-bus",
  40                                              0);
  41
  42        return 0;
  43}
  44
  45static const struct dm_i2c_ops cros_ec_i2c_ops = {
  46        .xfer           = cros_ec_i2c_xfer,
  47        .set_bus_speed  = cros_ec_i2c_set_bus_speed,
  48};
  49
  50static const struct udevice_id cros_ec_i2c_ids[] = {
  51        { .compatible = "google,cros-ec-i2c-tunnel" },
  52        { }
  53};
  54
  55U_BOOT_DRIVER(cros_ec_tunnel) = {
  56        .name   = "cros_ec_tunnel",
  57        .id     = UCLASS_I2C,
  58        .of_match = cros_ec_i2c_ids,
  59        .of_to_plat = cros_ec_i2c_of_to_plat,
  60        .priv_auto      = sizeof(struct cros_ec_i2c_bus),
  61        .ops    = &cros_ec_i2c_ops,
  62};
  63