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efi: payload: only init usb if necessary

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Up until now the call to initialize the USB subsystem was hardcoded
for U-Boot running as an EFI payload. This was used to enable the
use of a USB keyboard in the U-Boot shell. However not all boards
might need this functionality. As initializing the USB subsystem can
take a considerable amount of time (several seconds on some boards),
we now initialize the USB subsystem only if U-Boot is configured to
use USB keyboards.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
This commit is contained in:
Bin Meng 2018-11-29 20:07:13 -08:00
parent f86bd769fd
commit d3d6531866
1 changed files with 2 additions and 1 deletions
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3
arch/x86/cpu/efi/payload.c
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@ -166,7 +166,8 @@ int reserve_arch(void)
int last_stage_init(void)
{
/* start usb so that usb keyboard can be used as input device */
usb_init();
if (CONFIG_IS_ENABLED(USB_KEYBOARD))
usb_init();
return 0;
}