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cc456bd7 SG |
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 | ||
6d1a718f MF |
14 | DECLARE_GLOBAL_DATA_PTR; |
15 | ||
16 | struct cros_ec_i2c_bus { | |
17 | int remote_bus; | |
18 | }; | |
19 | ||
cc456bd7 SG |
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 | { | |
6d1a718f MF |
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; | |
e160f7d4 | 37 | int node = dev_of_offset(dev); |
6d1a718f MF |
38 | |
39 | i2c_bus->remote_bus = fdtdec_get_uint(blob, node, "google,remote-bus", | |
40 | 0); | |
41 | ||
42 | return 0; | |
cc456bd7 SG |
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, | |
6d1a718f MF |
59 | .ofdata_to_platdata = cros_ec_i2c_ofdata_to_platdata, |
60 | .priv_auto_alloc_size = sizeof(struct cros_ec_i2c_bus), | |
cc456bd7 SG |
61 | .ops = &cros_ec_i2c_ops, |
62 | }; |