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// SPDX-License-Identifier: GPL-2.0-only
// Copyright(c) 2019-2020 Intel Corporation.
#include <linux/device.h>
#include <linux/acpi.h>
#include <linux/pm_runtime.h>
#include <linux/soundwire/sdw.h>
#include <linux/soundwire/sdw_type.h>
#include "bus.h"
static void sdw_master_device_release(struct device *dev)
{
struct sdw_master_device *md = dev_to_sdw_master_device(dev);
kfree(md);
}
static const struct dev_pm_ops master_dev_pm = {
SET_RUNTIME_PM_OPS(pm_generic_runtime_suspend,
pm_generic_runtime_resume, NULL)
};
struct device_type sdw_master_type = {
.name = "soundwire_master",
.release = sdw_master_device_release,
.pm = &master_dev_pm,
};
/**
* sdw_master_device_add() - create a Linux Master Device representation.
* @bus: SDW bus instance
* @parent: parent device
* @fwnode: firmware node handle
*/
int sdw_master_device_add(struct sdw_bus *bus, struct device *parent,
struct fwnode_handle *fwnode)
{
struct sdw_master_device *md;
int ret;
if (!parent)
return -EINVAL;
md = kzalloc(sizeof(*md), GFP_KERNEL);
if (!md)
return -ENOMEM;
md->dev.bus = &sdw_bus_type;
md->dev.type = &sdw_master_type;
md->dev.parent = parent;
md->dev.of_node = parent->of_node;
md->dev.fwnode = fwnode;
md->dev.dma_mask = parent->dma_mask;
dev_set_name(&md->dev, "sdw-master-%d", bus->id);
ret = device_register(&md->dev);
if (ret) {
dev_err(parent, "Failed to add master: ret %d\n", ret);
/*
* On err, don't free but drop ref as this will be freed
* when release method is invoked.
*/
put_device(&md->dev);
goto device_register_err;
}
/* add shortcuts to improve code readability/compactness */
md->bus = bus;
bus->dev = &md->dev;
bus->md = md;
device_register_err:
return ret;
}
/**
* sdw_master_device_del() - delete a Linux Master Device representation.
* @bus: bus handle
*
* This function is the dual of sdw_master_device_add()
*/
int sdw_master_device_del(struct sdw_bus *bus)
{
device_unregister(bus->dev);
return 0;
}
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