]> git.sur5r.net Git - u-boot/blob - drivers/i2c/cros_ec_tunnel.c
Merge tag 'signed-efi-next' of git://github.com/agraf/u-boot
[u-boot] / drivers / i2c / cros_ec_tunnel.c
1 /*
2  * Copyright (c) 2015 Google, Inc
3  * Written by Simon Glass <sjg@chromium.org>
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #include <common.h>
9 #include <dm.h>
10 #include <cros_ec.h>
11 #include <errno.h>
12 #include <i2c.h>
13
14 DECLARE_GLOBAL_DATA_PTR;
15
16 struct cros_ec_i2c_bus {
17         int remote_bus;
18 };
19
20 static int cros_ec_i2c_set_bus_speed(struct udevice *dev, unsigned int speed)
21 {
22         return 0;
23 }
24
25 static 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
33 static int cros_ec_i2c_ofdata_to_platdata(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
45 static 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
50 static const struct udevice_id cros_ec_i2c_ids[] = {
51         { .compatible = "google,cros-ec-i2c-tunnel" },
52         { }
53 };
54
55 U_BOOT_DRIVER(cros_ec_tunnel) = {
56         .name   = "cros_ec_tunnel",
57         .id     = UCLASS_I2C,
58         .of_match = cros_ec_i2c_ids,
59         .ofdata_to_platdata = cros_ec_i2c_ofdata_to_platdata,
60         .priv_auto_alloc_size = sizeof(struct cros_ec_i2c_bus),
61         .ops    = &cros_ec_i2c_ops,
62 };