From 18f288b8d48331d6d7391486d7fa355d3bfd2a9c Mon Sep 17 00:00:00 2001 From: Janne Grunau Date: Thu, 4 Apr 2024 08:25:52 +0200 Subject: usb: Add environment based device ignorelist Add the environment variable "usb_ignorelist" to prevent USB devices listed in it from being bound to drivers. This allows to ignore devices which are undesirable or trigger bugs in u-boot's USB stack. Devices emulating keyboards are one example of undesirable devices as u-boot currently supports only a single USB keyboard device. Most commonly, people run into this with Yubikeys, so let's ignore those in the default environment. Based on previous USB keyboard specific patches for the same purpose. Link: https://lore.kernel.org/u-boot/7ab604fb-0fec-4f5e-8708-7a3a7e2cb568@denx.de/ Reviewed-by: Neal Gompa Reviewed-by: Marek Vasut Signed-off-by: Janne Grunau --- include/env_default.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include') diff --git a/include/env_default.h b/include/env_default.h index 2ca4a087d3b..8ee500d1709 100644 --- a/include/env_default.h +++ b/include/env_default.h @@ -99,6 +99,17 @@ const char default_environment[] = { #ifdef CONFIG_SYS_SOC "soc=" CONFIG_SYS_SOC "\0" #endif +#ifdef CONFIG_USB_HOST + "usb_ignorelist=" +#ifdef CONFIG_USB_KEYBOARD + /* Ignore Yubico devices. Currently only a single USB keyboard device is + * supported and the emulated HID keyboard Yubikeys present is useless + * as keyboard. + */ + "0x1050:*," +#endif + "\0" +#endif #ifdef CONFIG_ENV_IMPORT_FDT "env_fdt_path=" CONFIG_ENV_FDT_PATH "\0" #endif -- cgit v1.2.3