From: Vahe Grigoryan Date: Thu, 14 Dec 2023 12:28:00 +0000 (+0100) Subject: arm64: dts: rockchip: expose BIOS Disable feedback pin on rk3399-puma X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=39d95566231d483a1c89e74cbcadc4394bfd53ef;p=linux.git arm64: dts: rockchip: expose BIOS Disable feedback pin on rk3399-puma The Puma SoM allows to select in hardware directly which storage medium to try for loading the bootloader, either SPI-NOR followed by eMMC followed by SD card, or SD card only. This signal is exposed on the Q7 connector and allows carrierboards to control it however they want. This feedback pin allows to know in which state the SoM currently is and provided the current state isn't modified until next reboot, know from which storage medium the bootloader could be loaded from next time. Signed-off-by: Vahe Grigoryan Link: https://lore.kernel.org/r/20231214122801.3144180-2-vahe.grigoryan@theobroma-systems.com Signed-off-by: Heiko Stuebner --- diff --git a/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi index 574a775ca880f..c08e69391c015 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi @@ -120,6 +120,20 @@ drive-impedance-ohm = <33>; }; +&gpio0 { + /* + * The BIOS_DISABLE hog is a feedback pin for the actual status of the + * signal. This usually represents the state of a switch on the baseboard. + * The pin has a 10k pull-up resistor connected, so no pull-up setting is needed. + */ + bios-disable-hog { + gpios = ; + gpio-hog; + input; + line-name = "bios_disable"; + }; +}; + &gmac { assigned-clocks = <&cru SCLK_RMII_SRC>; assigned-clock-parents = <&clkin_gmac>;