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
15static struct spilib_ops *spilib_ops;
16
17static 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(gbphy_dev->bundle,
24					  le16_to_cpu(gbphy_dev->cport_desc->id),
25					  NULL);
26	if (IS_ERR(connection))
27		return PTR_ERR(connection);
28
29	ret = gb_connection_enable(connection);
30	if (ret)
31		goto exit_connection_destroy;
32
33	ret = gb_spilib_master_init(connection, &gbphy_dev->dev, spilib_ops);
34	if (ret)
35		goto exit_connection_disable;
36
37	gb_gbphy_set_data(gbphy_dev, connection);
38
39	gbphy_runtime_put_autosuspend(gbphy_dev);
40	return 0;
41
42exit_connection_disable:
43	gb_connection_disable(connection);
44exit_connection_destroy:
45	gb_connection_destroy(connection);
46
47	return ret;
48}
49
50static void gb_spi_remove(struct gbphy_device *gbphy_dev)
51{
52	struct gb_connection *connection = gb_gbphy_get_data(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
64static const struct gbphy_device_id gb_spi_id_table[] = {
65	{ GBPHY_PROTOCOL(GREYBUS_PROTOCOL_SPI) },
66	{ },
67};
68MODULE_DEVICE_TABLE(gbphy, gb_spi_id_table);
69
70static 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
77module_gbphy_driver(spi_driver);
78MODULE_LICENSE("GPL v2");
79