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