feat: Ported original cape overlay to Linux 6.18.8/DTC 1.7.2

2026-02-08 17:30:29 +01:00
commit 0d1e074fe7
4 changed files with 4587 additions and 0 deletions
--- a/cape-bone-ibb-00A0.dtso
+++ b/cape-bone-ibb-00A0.dtso
@ -0,0 +1,151 @@
+/*
+ * This is the Device Tree overlay for the IBB Home Automation Cape
+ * for BeagleBone, BeagleBone Black and Beaglebone Green.
+ *
+ * Copyright (c) 2015 - Ingenieurbuero Budde
+ * Copyright (c) 2026 - Vincent Schweiger <vincent.schweiger@getcom.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pinctrl/am33xx.h>
+
+/*
+ * Helper to show loaded overlays under: /proc/device-tree/chosen/overlays/
+ */
+&{/chosen} {
+	overlays {
+		cape-bone-ibb-00A0.kernel = __TIMESTAMP__;
+	};
+};
+
+/*
+ * Free up the pins used by the cape from the pinmux helpers.
+ */
+&ocp {
+	P9_24_pinmux { status = "disabled"; };	/* uart1_txd.uart1_txd */
+	P9_26_pinmux { status = "disabled"; };	/* uart1_rxd.uart1_rxd */
+	P9_21_pinmux { status = "disabled"; }; /* spi0_d0.uart2_txd */
+	P9_22_pinmux { status = "disabled"; }; /* spi0_sclk.uart2_rxd */
+	P9_11_pinmux { status = "disabled"; }; /* gpmc_wait0.uart4_rxd_mux2 */
+	P9_13_pinmux { status = "disabled"; }; /* gpmc_wpn.uart4_txd_mux2 */
+	P9_15_pinmux { status = "disabled"; }; /* gpmc_a0.gpio1_16 */
+};
+
+&am33xx_pinmux {
+	bb_uart1_pins: pinmux_uart1_pins {
+		pinctrl-single,pins = <
+			AM33XX_PADCONF(AM335X_PIN_UART1_TXD, PIN_OUTPUT_PULLDOWN, MUX_MODE0)	/* P9_24: uart1_txd.uart1_txd */
+			AM33XX_PADCONF(AM335X_PIN_UART1_RXD, PIN_INPUT_PULLUP, MUX_MODE0)	/* P9_26: uart1_rxd.uart1_rxd */
+		>;
+	};
+
+	bb_uart2_pins: pinmux_uart2_pins {
+		pinctrl-single,pins = <
+			AM33XX_PADCONF(AM335X_PIN_SPI0_D0, PIN_OUTPUT_PULLDOWN, MUX_MODE1)	/* P9_21: spi0_d0.uart2_txd */
+			AM33XX_PADCONF(AM335X_PIN_SPI0_SCLK, PIN_INPUT_PULLUP, MUX_MODE1)	/* P9_22: spi0_sclk.uart2_rxd */
+		>;
+	};
+
+	bb_uart4_pins: pinmux_uart4_pins {
+		pinctrl-single,pins = <
+			AM33XX_PADCONF(AM335X_PIN_GPMC_WAIT0, PIN_INPUT_PULLUP, MUX_MODE6) /* P9_11: gpmc_wait0.uart4_rxd_mux2 */
+			AM33XX_PADCONF(AM335X_PIN_GPMC_WPN, PIN_INPUT_PULLDOWN, MUX_MODE6) /* P9_13: gpmc_wait0.uart4_txd_mux2 */
+		>;
+	};
+
+	bb_gpio1_16_pins: pinmux_gpio1_16_pins {
+		pinctrl-single,pins = <
+			AM33XX_PADCONF(AM335X_PIN_GPMC_A0, PIN_INPUT, MUX_MODE7) /* P9_15: gpmc_a0.gpio1_16 */
+		>;
+	};
+};
+
+&uart1 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&bb_uart1_pins>;
+};
+
+&uart2 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&bb_uart2_pins>;
+};
+
+&uart4 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&bb_uart4_pins>;
+};
+
+&i2c2 {
+	status = "okay";
+	clock-frequency = <400000>;
+
+	/* shut up DTC warnings */
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	rtc@68 {
+		compatible = "maxim,ds3231";
+		reg = <0x68>;
+	};
+
+	 /* PCA9546 I2C multiplexer */
+	i2cmux@70 {
+		compatible = "nxp,pca9546";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <0x70>;
+
+		im0: bus@0 {
+			compatible = "nxp,pca954x-bus";
+			reg = <0>;
+		};
+		im1: bus@1 {
+			compatible = "nxp,pca954x-bus";
+			reg = <1>;
+		};
+		im2: bus@2 {
+			compatible = "nxp,pca954x-bus";
+			reg = <2>;
+		};
+		im3: bus@3 {
+			compatible = "nxp,pca954x-bus";
+			reg = <3>;
+		};
+	};
+};
+
+&{/} {
+    gpio_keys {
+        compatible = "gpio-keys";
+        pinctrl-names = "default";
+        pinctrl-0 = <&bb_gpio1_16_pins>;
+
+	/* avoid stupid warning */
+	#address-cells = <1>;
+	#size-celss = <0>;
+
+        rtc_mfp@1 {
+            label = "rtc_mfp";
+            gpios = <&gpio1 16 GPIO_ACTIVE_HIGH>;
+            linux,code = <143>; /* System Wake Up */
+            gpio-key,wakeup;
+        };
+    };
+
+    aliases {
+        i2c3 = &im0;
+        i2c4 = &im1;
+        i2c5 = &im2;
+        i2c6 = &im3;
+    };
+};