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/*
* SPI bridge PHY driver.
*
* Copyright 2014-2016 Google Inc.
* Copyright 2014-2016 Linaro Ltd.
*
* Released under the GPLv2 only.
*/
#include <linux/module.h>
#include "greybus.h"
#include "gbphy.h"
#include "spilib.h"
#ifndef SPI_CORE_SUPPORT_PM
static int gbphy_spi_prepare_transfer_hardware(struct device *dev)
{
return gbphy_runtime_get_sync(to_gbphy_dev(dev));
}
static void gbphy_spi_unprepare_transfer_hardware(struct device *dev)
{
gbphy_runtime_put_autosuspend(to_gbphy_dev(dev));
}
static struct spilib_ops __spilib_ops = {
.prepare_transfer_hardware = gbphy_spi_prepare_transfer_hardware,
.unprepare_transfer_hardware = gbphy_spi_unprepare_transfer_hardware,
};
static struct spilib_ops *spilib_ops = &__spilib_ops;
#else
static struct spilib_ops *spilib_ops = NULL;
#endif
static int gb_spi_probe(struct gbphy_device *gbphy_dev,
const struct gbphy_device_id *id)
{
struct gb_connection *connection;
int ret;
connection = gb_connection_create(gbphy_dev->bundle,
le16_to_cpu(gbphy_dev->cport_desc->id),
NULL);
if (IS_ERR(connection))
return PTR_ERR(connection);
ret = gb_connection_enable(connection);
if (ret)
goto exit_connection_destroy;
ret = gb_spilib_master_init(connection, &gbphy_dev->dev, spilib_ops);
if (ret)
goto exit_connection_disable;
gb_gbphy_set_data(gbphy_dev, connection);
gbphy_runtime_put_autosuspend(gbphy_dev);
return 0;
exit_connection_disable:
gb_connection_disable(connection);
exit_connection_destroy:
gb_connection_destroy(connection);
return ret;
}
static void gb_spi_remove(struct gbphy_device *gbphy_dev)
{
struct gb_connection *connection = gb_gbphy_get_data(gbphy_dev);
int ret;
ret = gbphy_runtime_get_sync(gbphy_dev);
if (ret)
gbphy_runtime_get_noresume(gbphy_dev);
gb_spilib_master_exit(connection);
gb_connection_disable(connection);
gb_connection_destroy(connection);
}
static const struct gbphy_device_id gb_spi_id_table[] = {
{ GBPHY_PROTOCOL(GREYBUS_PROTOCOL_SPI) },
{ },
};
MODULE_DEVICE_TABLE(gbphy, gb_spi_id_table);
static struct gbphy_driver spi_driver = {
.name = "spi",
.probe = gb_spi_probe,
.remove = gb_spi_remove,
.id_table = gb_spi_id_table,
};
module_gbphy_driver(spi_driver);
MODULE_LICENSE("GPL v2");
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