From 4f11095a4ae00b2fe4cebb21e36ee37cc62f5e1a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Marek=20Beh=C3=BAn?= Date: Mon, 1 Jul 2024 13:30:09 +0200 Subject: [PATCH 07/11] ARM: dts: turris-omnia: Add MCU system-controller node MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Turris Omnia's MCU provides various features that can be configured over I2C at address 0x2a. Add device-tree node. This does not carry a Fixes tag - we do not want this to get backported to stable kernels for the following reason: U-Boot since v2022.10 inserts a phy-reset-gpio property into the WAN ethernet node pointing to the MCU node if it finds the MCU node with a cznic,turris-omnia-mcu compatible. Thus if this change got backported to a stable kernel, the WAN interface driver would defer probe indefinitely (since it would wait for the turris-omnia-mcu driver which would not be present). Signed-off-by: Marek Behún Reviewed-by: Andrew Lunn Reviewed-by: Andy Shevchenko Reviewed-by: Conor Dooley Acked-by: Bartosz Golaszewski Acked-by: Alexandre Belloni Link: https://lore.kernel.org/r/20240701113010.16447-8-kabel@kernel.org Signed-off-by: Arnd Bergmann --- .../dts/marvell/armada-385-turris-omnia.dts | 22 ++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) --- a/arch/arm/boot/dts/marvell/armada-385-turris-omnia.dts +++ b/arch/arm/boot/dts/marvell/armada-385-turris-omnia.dts @@ -218,7 +218,22 @@ #size-cells = <0>; reg = <0>; - /* STM32F0 command interface at address 0x2a */ + mcu: system-controller@2a { + compatible = "cznic,turris-omnia-mcu"; + reg = <0x2a>; + + pinctrl-names = "default"; + pinctrl-0 = <&mcu_pins>; + + interrupt-parent = <&gpio1>; + interrupts = <11 IRQ_TYPE_NONE>; + + gpio-controller; + #gpio-cells = <3>; + + interrupt-controller; + #interrupt-cells = <2>; + }; led-controller@2b { compatible = "cznic,turris-omnia-leds"; @@ -503,6 +518,11 @@ }; &pinctrl { + mcu_pins: mcu-pins { + marvell,pins = "mpp43"; + marvell,function = "gpio"; + }; + pcawan_pins: pcawan-pins { marvell,pins = "mpp46"; marvell,function = "gpio";