git.openwrt.org Git - openwrt/staging/pepe2k.git/blob

   1 From 4f11095a4ae00b2fe4cebb21e36ee37cc62f5e1a Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel@kernel.org>
   3 Date: Mon, 1 Jul 2024 13:30:09 +0200
   4 Subject: [PATCH 07/11] ARM: dts: turris-omnia: Add MCU system-controller node
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 Turris Omnia's MCU provides various features that can be configured over
  10 I2C at address 0x2a. Add device-tree node.
  11
  12 This does not carry a Fixes tag - we do not want this to get backported
  13 to stable kernels for the following reason: U-Boot since v2022.10
  14 inserts a phy-reset-gpio property into the WAN ethernet node pointing to
  15 the MCU node if it finds the MCU node with a cznic,turris-omnia-mcu
  16 compatible. Thus if this change got backported to a stable kernel, the
  17 WAN interface driver would defer probe indefinitely (since it would wait
  18 for the turris-omnia-mcu driver which would not be present).
  19
  20 Signed-off-by: Marek Behún <kabel@kernel.org>
  21 Reviewed-by: Andrew Lunn <andrew@lunn.ch>
  22 Reviewed-by: Andy Shevchenko <andy@kernel.org>
  23 Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
  24 Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
  25 Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
  26 Link: https://lore.kernel.org/r/20240701113010.16447-8-kabel@kernel.org
  27 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
  28 ---
  29  .../dts/marvell/armada-385-turris-omnia.dts   | 22 ++++++++++++++++++-
  30  1 file changed, 21 insertions(+), 1 deletion(-)
  31
  32 --- a/arch/arm/boot/dts/marvell/armada-385-turris-omnia.dts
  33 +++ b/arch/arm/boot/dts/marvell/armada-385-turris-omnia.dts
  34 @@ -218,7 +218,22 @@
  35                         #size-cells = <0>;
  36                         reg = <0>;
  37
  38 -                       /* STM32F0 command interface at address 0x2a */
  39 +                       mcu: system-controller@2a {
  40 +                               compatible = "cznic,turris-omnia-mcu";
  41 +                               reg = <0x2a>;
  42 +
  43 +                               pinctrl-names = "default";
  44 +                               pinctrl-0 = <&mcu_pins>;
  45 +
  46 +                               interrupt-parent = <&gpio1>;
  47 +                               interrupts = <11 IRQ_TYPE_NONE>;
  48 +
  49 +                               gpio-controller;
  50 +                               #gpio-cells = <3>;
  51 +
  52 +                               interrupt-controller;
  53 +                               #interrupt-cells = <2>;
  54 +                       };
  55
  56                         led-controller@2b {
  57                                 compatible = "cznic,turris-omnia-leds";
  58 @@ -503,6 +518,11 @@
  59  };
  60
  61  &pinctrl {
  62 +       mcu_pins: mcu-pins {
  63 +               marvell,pins = "mpp43";
  64 +               marvell,function = "gpio";
  65 +       };
  66 +
  67         pcawan_pins: pcawan-pins {
  68                 marvell,pins = "mpp46";
  69                 marvell,function = "gpio";