80 lines · c
1// SPDX-License-Identifier: GPL-2.02/*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_DESCRIPTION("Greybus SPI bridge PHY driver");79MODULE_LICENSE("GPL v2");80