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usb: udc: Introduce ->udc_set_speed() method

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This patch was copied from kernel commit: 67fdfda4a99ed.

Sometimes, the gadget driver we want to run has max_speed lower than
what the UDC supports. In such situations, UDC might want to make sure
we don't try to connect on speeds not supported by the gadget
driver because that will just fail.

So here introduce a new optional ->udc_set_speed() method which can be
implemented by interested UDC drivers to achieve this purpose.

Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
This commit is contained in:
Sherry Sun 2019-10-01 17:26:32 +05:30 • committed by Marek Vasut
parent 77dcbdf3c1
commit 8d94e184ff
2 changed files with 25 additions and 0 deletions
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2
include/linux/usb/gadget.h
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@ -470,6 +470,8 @@ struct usb_gadget_ops {
struct usb_ep *(*match_ep)(struct usb_gadget *,
struct usb_endpoint_descriptor *,
struct usb_ss_ep_comp_descriptor *);
void (*udc_set_speed)(struct usb_gadget *gadget,
enum usb_device_speed);
};
/**