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usb: emul: Expose find_descriptor() as a public API

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This can be useful outside of the sandbox usb emulation uclass
driver. Expose it as a public API with a proper prefix (usb_emul_).

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Bin Meng
2017-10-01 06:19:40 -07:00
committed by Marek Vasut
parent 84aa8536f0
commit 848436a48d
2 changed files with 13 additions and 3 deletions
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11
include/usb.h
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@ -1055,6 +1055,17 @@ int usb_emul_find(struct udevice *bus, ulong pipe, int port1,
*/
int usb_emul_find_for_dev(struct udevice *dev, struct udevice **emulp);
/**
* usb_emul_find_descriptor() - Find a USB descriptor of a particular device
*
* @ptr: a pointer to a list of USB descriptor pointers
* @type: type of USB descriptor to find
* @index: if @type is USB_DT_CONFIG, this is the configuration value
* @return a pointer to the USB descriptor found, NULL if not found
*/
struct usb_generic_descriptor **usb_emul_find_descriptor(
struct usb_generic_descriptor **ptr, int type, int index);
/**
* usb_emul_reset() - Reset all emulators ready for use
*