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coreboot: 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 a coreboot 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: Thomas RIENOESSL <thomas.rienoessl@bachmann.info>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
This commit is contained in:
Thomas RIENOESSL 2018-11-29 20:07:12 -08:00 committed by Bin Meng
parent 2677a15e58
commit f86bd769fd
1 changed files with 2 additions and 1 deletions
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3
arch/x86/cpu/coreboot/coreboot.c
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@ -77,7 +77,8 @@ int last_stage_init(void)
timestamp_add_to_bootstage();
/* start usb so that usb keyboard can be used as input device */
usb_init();
if (CONFIG_IS_ENABLED(USB_KEYBOARD))
usb_init();
board_final_cleanup();