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https://github.com/edk2-porting/linux-next.git
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790d3a5ab6
this patch is a small preparation to fix isp1301 driver so that other platforms can use it. We're defining our private data structure to represent this device and adding the PHY to the PHY list. Later patches will come implementing proper PHY API and removing bogus code from ohci_nxp and lpc32xx_udc drivers. Signed-off-by: Felipe Balbi <balbi@ti.com>
104 lines
2.2 KiB
C
104 lines
2.2 KiB
C
/*
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* NXP ISP1301 USB transceiver driver
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*
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* Copyright (C) 2012 Roland Stigge
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*
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* Author: Roland Stigge <stigge@antcom.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/i2c.h>
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#include <linux/usb/phy.h>
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#define DRV_NAME "isp1301"
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struct isp1301 {
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struct usb_phy phy;
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struct mutex mutex;
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struct i2c_client *client;
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};
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static const struct i2c_device_id isp1301_id[] = {
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{ "isp1301", 0 },
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{ }
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};
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static struct i2c_client *isp1301_i2c_client;
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static int isp1301_probe(struct i2c_client *client,
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const struct i2c_device_id *i2c_id)
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{
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struct isp1301 *isp;
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struct usb_phy *phy;
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isp = devm_kzalloc(&client->dev, sizeof(*isp), GFP_KERNEL);
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if (!isp)
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return -ENOMEM;
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isp->client = client;
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mutex_init(&isp->mutex);
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phy = &isp->phy;
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phy->label = DRV_NAME;
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phy->type = USB_PHY_TYPE_USB2;
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i2c_set_clientdata(client, isp);
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usb_add_phy_dev(phy);
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isp1301_i2c_client = client;
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return 0;
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}
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static int isp1301_remove(struct i2c_client *client)
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{
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struct isp1301 *isp = i2c_get_clientdata(client);
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usb_remove_phy(&isp->phy);
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isp1301_i2c_client = NULL;
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return 0;
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}
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static struct i2c_driver isp1301_driver = {
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.driver = {
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.name = DRV_NAME,
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},
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.probe = isp1301_probe,
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.remove = isp1301_remove,
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.id_table = isp1301_id,
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};
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module_i2c_driver(isp1301_driver);
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static int match(struct device *dev, void *data)
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{
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struct device_node *node = (struct device_node *)data;
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return (dev->of_node == node) &&
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(dev->driver == &isp1301_driver.driver);
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}
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struct i2c_client *isp1301_get_client(struct device_node *node)
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{
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if (node) { /* reference of ISP1301 I2C node via DT */
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struct device *dev = bus_find_device(&i2c_bus_type, NULL,
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node, match);
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if (!dev)
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return NULL;
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return to_i2c_client(dev);
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} else { /* non-DT: only one ISP1301 chip supported */
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return isp1301_i2c_client;
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}
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}
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EXPORT_SYMBOL_GPL(isp1301_get_client);
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MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>");
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MODULE_DESCRIPTION("NXP ISP1301 USB transceiver driver");
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MODULE_LICENSE("GPL");
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