1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * SPI bridge PHY driver. |
4 | * |
5 | * Copyright 2014-2016 Google Inc. |
6 | * Copyright 2014-2016 Linaro Ltd. |
7 | */ |
8 | |
9 | #include <linux/module.h> |
10 | #include <linux/greybus.h> |
11 | |
12 | #include "gbphy.h" |
13 | #include "spilib.h" |
14 | |
15 | static struct spilib_ops *spilib_ops; |
16 | |
17 | static int gb_spi_probe(struct gbphy_device *gbphy_dev, |
18 | const struct gbphy_device_id *id) |
19 | { |
20 | struct gb_connection *connection; |
21 | int ret; |
22 | |
23 | connection = gb_connection_create(bundle: gbphy_dev->bundle, |
24 | le16_to_cpu(gbphy_dev->cport_desc->id), |
25 | NULL); |
26 | if (IS_ERR(ptr: connection)) |
27 | return PTR_ERR(ptr: connection); |
28 | |
29 | ret = gb_connection_enable(connection); |
30 | if (ret) |
31 | goto exit_connection_destroy; |
32 | |
33 | ret = gb_spilib_master_init(connection, dev: &gbphy_dev->dev, ops: spilib_ops); |
34 | if (ret) |
35 | goto exit_connection_disable; |
36 | |
37 | gb_gbphy_set_data(gdev: gbphy_dev, data: connection); |
38 | |
39 | gbphy_runtime_put_autosuspend(gbphy_dev); |
40 | return 0; |
41 | |
42 | exit_connection_disable: |
43 | gb_connection_disable(connection); |
44 | exit_connection_destroy: |
45 | gb_connection_destroy(connection); |
46 | |
47 | return ret; |
48 | } |
49 | |
50 | static void gb_spi_remove(struct gbphy_device *gbphy_dev) |
51 | { |
52 | struct gb_connection *connection = gb_gbphy_get_data(gdev: gbphy_dev); |
53 | int ret; |
54 | |
55 | ret = gbphy_runtime_get_sync(gbphy_dev); |
56 | if (ret) |
57 | gbphy_runtime_get_noresume(gbphy_dev); |
58 | |
59 | gb_spilib_master_exit(connection); |
60 | gb_connection_disable(connection); |
61 | gb_connection_destroy(connection); |
62 | } |
63 | |
64 | static const struct gbphy_device_id gb_spi_id_table[] = { |
65 | { GBPHY_PROTOCOL(GREYBUS_PROTOCOL_SPI) }, |
66 | { }, |
67 | }; |
68 | MODULE_DEVICE_TABLE(gbphy, gb_spi_id_table); |
69 | |
70 | static struct gbphy_driver spi_driver = { |
71 | .name = "spi" , |
72 | .probe = gb_spi_probe, |
73 | .remove = gb_spi_remove, |
74 | .id_table = gb_spi_id_table, |
75 | }; |
76 | |
77 | module_gbphy_driver(spi_driver); |
78 | MODULE_LICENSE("GPL v2" ); |
79 | |