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dm: usb: udc: Use SEQ_ALIAS to index the USB gadget ports 

dfu, fastbot and other usb gadget commands take the USB port index as a
parameter. Currently this index is assigned in the order of the driver
bindings.
Changing this behavior using the SEQ_ALIAS feature. This option assign to
the device a SEQ number based on its alias (if it exists)

To use it we must set the DM_UC_FLAG_SEQ_ALIAS flag and follow the existing
naming convention: use "usb" for the name of the gadget UCLASS_DRIVER
(same as for the UCLASS_USB).

If no alias is provided, then the index falls back to the order in which
the bindings took place.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reported-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Tested-by: Sam Protsenko <semen.protsenko@linaro.org>
This commit is contained in:
Jean-Jacques Hiblot 2018-12-15 17:43:27 +01:00 committed by Marek Vasut
parent 8c6cc71b40
commit 801f1fa442
1 changed files with 3 additions and 2 deletions
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5
drivers/usb/gadget/udc/udc-uclass.c
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@ -20,7 +20,7 @@ int usb_gadget_initialize(int index)
return -EINVAL; return -EINVAL;
if (dev_array[index]) if (dev_array[index])
return 0; return 0;
ret = uclass_get_device(UCLASS_USB_GADGET_GENERIC, index, &dev); ret = uclass_get_device_by_seq(UCLASS_USB_GADGET_GENERIC, index, &dev);
if (!dev || ret) { if (!dev || ret) {
pr_err("No USB device found\n"); pr_err("No USB device found\n");
return -ENODEV; return -ENODEV;
@ -54,5 +54,6 @@ int usb_gadget_handle_interrupts(int index)
UCLASS_DRIVER(usb_gadget_generic) = { UCLASS_DRIVER(usb_gadget_generic) = {
.id = UCLASS_USB_GADGET_GENERIC, .id = UCLASS_USB_GADGET_GENERIC,
.name = "usb_gadget_generic", .name = "usb",
.flags = DM_UC_FLAG_SEQ_ALIAS,
}; };