mirror of
https://github.com/torvalds/linux.git
synced 2024-12-01 16:41:39 +00:00
fa82796609
Since renesas_usb3 udc driver calls usb_of_get_companion_dev()
which is on usb/core/of.c, build error like below happens if we
disable CONFIG_USB because the usb/core/ needs CONFIG_USB:
ERROR: "usb_of_get_companion_dev" [drivers/usb/gadget/udc/renesas_usb3.ko] undefined!
According to the usb/gadget/Kconfig, "NOTE: Gadget support
** DOES NOT ** depend on host-side CONFIG_USB !!".
So, to fix the issue, this patch changes the usb_of_get_companion_dev()
place from usb/core/of.c to usb/common/common.c to be called by both
host and gadget.
Reported-by: John Garry <john.garry@huawei.com>
Fixes: 39facfa01c ("usb: gadget: udc: renesas_usb3: Add register of usb role switch")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* of.c The helpers for hcd device tree support
|
|
*
|
|
* Copyright (C) 2016 Freescale Semiconductor, Inc.
|
|
* Author: Peter Chen <peter.chen@freescale.com>
|
|
* Copyright (C) 2017 Johan Hovold <johan@kernel.org>
|
|
*/
|
|
|
|
#include <linux/of.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/usb/of.h>
|
|
|
|
/**
|
|
* usb_of_get_device_node() - get a USB device node
|
|
* @hub: hub to which device is connected
|
|
* @port1: one-based index of port
|
|
*
|
|
* Look up the node of a USB device given its parent hub device and one-based
|
|
* port number.
|
|
*
|
|
* Return: A pointer to the node with incremented refcount if found, or
|
|
* %NULL otherwise.
|
|
*/
|
|
struct device_node *usb_of_get_device_node(struct usb_device *hub, int port1)
|
|
{
|
|
struct device_node *node;
|
|
u32 reg;
|
|
|
|
for_each_child_of_node(hub->dev.of_node, node) {
|
|
if (of_property_read_u32(node, "reg", ®))
|
|
continue;
|
|
|
|
if (reg == port1)
|
|
return node;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(usb_of_get_device_node);
|
|
|
|
/**
|
|
* usb_of_has_combined_node() - determine whether a device has a combined node
|
|
* @udev: USB device
|
|
*
|
|
* Determine whether a USB device has a so called combined node which is
|
|
* shared with its sole interface. This is the case if and only if the device
|
|
* has a node and its decriptors report the following:
|
|
*
|
|
* 1) bDeviceClass is 0 or 9, and
|
|
* 2) bNumConfigurations is 1, and
|
|
* 3) bNumInterfaces is 1.
|
|
*
|
|
* Return: True iff the device has a device node and its descriptors match the
|
|
* criteria for a combined node.
|
|
*/
|
|
bool usb_of_has_combined_node(struct usb_device *udev)
|
|
{
|
|
struct usb_device_descriptor *ddesc = &udev->descriptor;
|
|
struct usb_config_descriptor *cdesc;
|
|
|
|
if (!udev->dev.of_node)
|
|
return false;
|
|
|
|
switch (ddesc->bDeviceClass) {
|
|
case USB_CLASS_PER_INTERFACE:
|
|
case USB_CLASS_HUB:
|
|
if (ddesc->bNumConfigurations == 1) {
|
|
cdesc = &udev->config->desc;
|
|
if (cdesc->bNumInterfaces == 1)
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
EXPORT_SYMBOL_GPL(usb_of_has_combined_node);
|
|
|
|
/**
|
|
* usb_of_get_interface_node() - get a USB interface node
|
|
* @udev: USB device of interface
|
|
* @config: configuration value
|
|
* @ifnum: interface number
|
|
*
|
|
* Look up the node of a USB interface given its USB device, configuration
|
|
* value and interface number.
|
|
*
|
|
* Return: A pointer to the node with incremented refcount if found, or
|
|
* %NULL otherwise.
|
|
*/
|
|
struct device_node *
|
|
usb_of_get_interface_node(struct usb_device *udev, u8 config, u8 ifnum)
|
|
{
|
|
struct device_node *node;
|
|
u32 reg[2];
|
|
|
|
for_each_child_of_node(udev->dev.of_node, node) {
|
|
if (of_property_read_u32_array(node, "reg", reg, 2))
|
|
continue;
|
|
|
|
if (reg[0] == ifnum && reg[1] == config)
|
|
return node;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(usb_of_get_interface_node);
|