mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 20:24:29 +07:00
1ab589c72e
Use mfd_add_hotplug_devices helper to register the subdevices. Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
138 lines
3.3 KiB
C
138 lines
3.3 KiB
C
/*
|
|
* Nano River Technologies viperboard driver
|
|
*
|
|
* This is the core driver for the viperboard. There are cell drivers
|
|
* available for I2C, ADC and both GPIOs. SPI is not yet supported.
|
|
* The drivers do not support all features the board exposes. See user
|
|
* manual of the viperboard.
|
|
*
|
|
* (C) 2012 by Lemonage GmbH
|
|
* Author: Lars Poeschel <poeschel@lemonage.de>
|
|
* All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/types.h>
|
|
#include <linux/mutex.h>
|
|
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/viperboard.h>
|
|
|
|
#include <linux/usb.h>
|
|
|
|
|
|
static const struct usb_device_id vprbrd_table[] = {
|
|
{ USB_DEVICE(0x2058, 0x1005) }, /* Nano River Technologies */
|
|
{ } /* Terminating entry */
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(usb, vprbrd_table);
|
|
|
|
static const struct mfd_cell vprbrd_devs[] = {
|
|
{
|
|
.name = "viperboard-gpio",
|
|
},
|
|
{
|
|
.name = "viperboard-i2c",
|
|
},
|
|
{
|
|
.name = "viperboard-adc",
|
|
},
|
|
};
|
|
|
|
static int vprbrd_probe(struct usb_interface *interface,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct vprbrd *vb;
|
|
|
|
u16 version = 0;
|
|
int pipe, ret;
|
|
|
|
/* allocate memory for our device state and initialize it */
|
|
vb = kzalloc(sizeof(*vb), GFP_KERNEL);
|
|
if (vb == NULL) {
|
|
dev_err(&interface->dev, "Out of memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
mutex_init(&vb->lock);
|
|
|
|
vb->usb_dev = usb_get_dev(interface_to_usbdev(interface));
|
|
|
|
/* save our data pointer in this interface device */
|
|
usb_set_intfdata(interface, vb);
|
|
dev_set_drvdata(&vb->pdev.dev, vb);
|
|
|
|
/* get version information, major first, minor then */
|
|
pipe = usb_rcvctrlpipe(vb->usb_dev, 0);
|
|
ret = usb_control_msg(vb->usb_dev, pipe, VPRBRD_USB_REQUEST_MAJOR,
|
|
VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, vb->buf, 1,
|
|
VPRBRD_USB_TIMEOUT_MS);
|
|
if (ret == 1)
|
|
version = vb->buf[0];
|
|
|
|
ret = usb_control_msg(vb->usb_dev, pipe, VPRBRD_USB_REQUEST_MINOR,
|
|
VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, vb->buf, 1,
|
|
VPRBRD_USB_TIMEOUT_MS);
|
|
if (ret == 1) {
|
|
version <<= 8;
|
|
version = version | vb->buf[0];
|
|
}
|
|
|
|
dev_info(&interface->dev,
|
|
"version %x.%02x found at bus %03d address %03d\n",
|
|
version >> 8, version & 0xff,
|
|
vb->usb_dev->bus->busnum, vb->usb_dev->devnum);
|
|
|
|
ret = mfd_add_hotplug_devices(&interface->dev, vprbrd_devs,
|
|
ARRAY_SIZE(vprbrd_devs));
|
|
if (ret != 0) {
|
|
dev_err(&interface->dev, "Failed to add mfd devices to core.");
|
|
goto error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
if (vb) {
|
|
usb_put_dev(vb->usb_dev);
|
|
kfree(vb);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void vprbrd_disconnect(struct usb_interface *interface)
|
|
{
|
|
struct vprbrd *vb = usb_get_intfdata(interface);
|
|
|
|
mfd_remove_devices(&interface->dev);
|
|
usb_set_intfdata(interface, NULL);
|
|
usb_put_dev(vb->usb_dev);
|
|
kfree(vb);
|
|
|
|
dev_dbg(&interface->dev, "disconnected\n");
|
|
}
|
|
|
|
static struct usb_driver vprbrd_driver = {
|
|
.name = "viperboard",
|
|
.probe = vprbrd_probe,
|
|
.disconnect = vprbrd_disconnect,
|
|
.id_table = vprbrd_table,
|
|
};
|
|
|
|
module_usb_driver(vprbrd_driver);
|
|
|
|
MODULE_DESCRIPTION("Nano River Technologies viperboard mfd core driver");
|
|
MODULE_AUTHOR("Lars Poeschel <poeschel@lemonage.de>");
|
|
MODULE_LICENSE("GPL");
|