Add SC16IS75x Breakout Boards as Shields

boards/shields/sc16is75x_bb/Kconfig.defconfig

@@ -0,0 +1,44 @@
+# Copyright (c) 2024 TiaC Systems
+# SPDX-License-Identifier: Apache-2.0
+
+config SHIELD_CJMCU_750
+	bool
+	default y if SHIELD_CJMCU_750_I2C
+	default y if SHIELD_CJMCU_750_I2C_NOIRQ
+	default y if SHIELD_CJMCU_750_SPI
+	default y if SHIELD_CJMCU_750_SPI_NOIRQ
+	default n
+
+config SHIELD_CJMCU_752
+	bool
+	default y if SHIELD_CJMCU_752_I2C
+	default y if SHIELD_CJMCU_752_I2C_NOIRQ
+	default y if SHIELD_CJMCU_752_SPI
+	default y if SHIELD_CJMCU_752_SPI_NOIRQ
+	default n
+
+config MFD
+	default y
+	depends on SHIELD_CJMCU_750 || SHIELD_CJMCU_752
+
+config I2C
+	default y if SHIELD_CJMCU_750_I2C || SHIELD_CJMCU_750_I2C_NOIRQ
+	default y if SHIELD_CJMCU_752_I2C || SHIELD_CJMCU_752_I2C_NOIRQ
+	depends on SHIELD_CJMCU_750 || SHIELD_CJMCU_752
+
+config SPI
+	default y if SHIELD_CJMCU_750_SPI || SHIELD_CJMCU_750_SPI_NOIRQ
+	default y if SHIELD_CJMCU_752_SPI || SHIELD_CJMCU_752_SPI_NOIRQ
+	depends on SHIELD_CJMCU_750 || SHIELD_CJMCU_752
+
+config SERIAL
+	default y if DT_HAS_NXP_SC16IS75X_UART_ENABLED
+	depends on SHIELD_CJMCU_750 || SHIELD_CJMCU_752
+
+config GPIO
+	default y if DT_HAS_NXP_SC16IS75X_GPIO_ENABLED
+	depends on SHIELD_CJMCU_750 || SHIELD_CJMCU_752
+
+config DYNAMIC_THREAD_POOL_SIZE
+	default 1 if MFD_SC16IS75X_ASYNC && !DYNAMIC_THREAD_ALLOC
+	depends on (SHIELD_CJMCU_750 || SHIELD_CJMCU_752) && MFD_SC16IS75X

boards/shields/sc16is75x_bb/Kconfig.shield

@@ -0,0 +1,26 @@
+# Copyright (c) 2024 TiaC Systems
+# SPDX-License-Identifier: Apache-2.0
+
+config SHIELD_CJMCU_750_I2C
+	def_bool $(shields_list_contains,cjmcu_750_i2c)
+
+config SHIELD_CJMCU_750_I2C_NOIRQ
+	def_bool $(shields_list_contains,cjmcu_750_i2c_noirq)
+
+config SHIELD_CJMCU_750_SPI
+	def_bool $(shields_list_contains,cjmcu_750_spi)
+
+config SHIELD_CJMCU_750_SPI_NOIRQ
+	def_bool $(shields_list_contains,cjmcu_750_spi_noirq)
+
+config SHIELD_CJMCU_752_I2C
+	def_bool $(shields_list_contains,cjmcu_752_i2c)
+
+config SHIELD_CJMCU_752_I2C_NOIRQ
+	def_bool $(shields_list_contains,cjmcu_752_i2c_noirq)
+
+config SHIELD_CJMCU_752_SPI
+	def_bool $(shields_list_contains,cjmcu_752_spi)
+
+config SHIELD_CJMCU_752_SPI_NOIRQ
+	def_bool $(shields_list_contains,cjmcu_752_spi_noirq)

boards/shields/sc16is75x_bb/cjmcu_750.dtsi

@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "cjmcu_750/osc.dtsi"
+#include "cjmcu_75x/core.dtsi"
+#include "cjmcu_75x/gpio.dtsi"
+#include "cjmcu_75x/uart0.dtsi"

boards/shields/sc16is75x_bb/cjmcu_750/osc.dtsi

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	cjmcu_osc: sc16is752-osc {
+		compatible = "fixed-clock";
+		status = "okay";
+
+		#clock-cells = <0>;
+		clock-frequency = <14746500>;
+	};
+};

boards/shields/sc16is75x_bb/cjmcu_750_i2c.overlay

@@ -0,0 +1,10 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "cjmcu_750_i2c_noirq.overlay"
+
+&cjmcu_75x {
+	interrupt-gpios = <&cjmcu_hif_i2c 3 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+};

boards/shields/sc16is75x_bb/cjmcu_750_i2c_noirq.overlay

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/i2c/i2c.h>
+#include <zephyr/dt-bindings/gpio/gpio.h>
+
+&cjmcu_i2c {
+	status = "okay";
+
+	clock-frequency = <I2C_BITRATE_STANDARD>;
+
+	cjmcu_75x: sc16is750@48 {
+		reg = <0x48>;
+
+		reset-gpios = <&cjmcu_hif_i2c 7 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+
+		cjmcu_75x_gpio: sc16is750-48-gpio {};
+		cjmcu_75x_uart0: sc16is750-48-uart@0 {};
+	};
+};
+
+#include "cjmcu_750.dtsi"

boards/shields/sc16is75x_bb/cjmcu_750_spi.overlay

@@ -0,0 +1,10 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "cjmcu_750_spi_noirq.overlay"
+
+&cjmcu_75x {
+	interrupt-gpios = <&cjmcu_hif_spi 3 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+};

boards/shields/sc16is75x_bb/cjmcu_750_spi_noirq.overlay

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <freq.h>
+#include <zephyr/dt-bindings/gpio/gpio.h>
+
+&cjmcu_spi {
+	status = "okay";
+
+	cjmcu_75x: sc16is750@0 {
+		reg = <0>;
+
+		spi-max-frequency = <DT_FREQ_M(4)>;
+		reset-gpios = <&cjmcu_hif_spi 7 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+
+		cjmcu_75x_gpio: sc16is750-0-gpio {};
+		cjmcu_75x_uart0: sc16is750-0-uart@0 {};
+	};
+};
+
+#include "cjmcu_750.dtsi"

boards/shields/sc16is75x_bb/cjmcu_752.dtsi

@@ -0,0 +1,10 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "cjmcu_752/osc.dtsi"
+#include "cjmcu_75x/core.dtsi"
+#include "cjmcu_75x/gpio.dtsi"
+#include "cjmcu_75x/uart0.dtsi"
+#include "cjmcu_75x/uart1.dtsi"

boards/shields/sc16is75x_bb/cjmcu_752/osc.dtsi

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	cjmcu_osc: sc16is752-osc {
+		compatible = "fixed-clock";
+		status = "okay";
+
+		#clock-cells = <0>;
+		clock-frequency = <1843200>;
+	};
+};

boards/shields/sc16is75x_bb/cjmcu_752_i2c.overlay

@@ -0,0 +1,10 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "cjmcu_752_i2c_noirq.overlay"
+
+&cjmcu_75x {
+	interrupt-gpios = <&cjmcu_hif_i2c 3 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+};

boards/shields/sc16is75x_bb/cjmcu_752_i2c_noirq.overlay

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/i2c/i2c.h>
+#include <zephyr/dt-bindings/gpio/gpio.h>
+
+&cjmcu_i2c {
+	status = "okay";
+
+	clock-frequency = <I2C_BITRATE_STANDARD>;
+
+	cjmcu_75x: sc16is752@48 {
+		reg = <0x48>;
+
+		reset-gpios = <&cjmcu_hif_i2c 7 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+
+		cjmcu_75x_gpio: sc16is752-48-gpio {};
+		cjmcu_75x_uart0: sc16is752-48-uart@0 {};
+		cjmcu_75x_uart1: sc16is752-48-uart@1 {};
+	};
+};
+
+#include "cjmcu_752.dtsi"

boards/shields/sc16is75x_bb/cjmcu_752_spi.overlay

@@ -0,0 +1,10 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "cjmcu_752_spi_noirq.overlay"
+
+&cjmcu_75x {
+	interrupt-gpios = <&cjmcu_hif_spi 3 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+};

boards/shields/sc16is75x_bb/cjmcu_752_spi_noirq.overlay

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <freq.h>
+#include <zephyr/dt-bindings/gpio/gpio.h>
+
+&cjmcu_spi {
+	status = "okay";
+
+	cjmcu_75x: sc16is752@0 {
+		reg = <0>;
+
+		spi-max-frequency = <DT_FREQ_M(4)>;
+		reset-gpios = <&cjmcu_hif_spi 7 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+
+		cjmcu_75x_gpio: sc16is752-0-gpio {};
+		cjmcu_75x_uart0: sc16is752-0-uart@0 {};
+		cjmcu_75x_uart1: sc16is752-0-uart@1 {};
+	};
+};
+
+#include "cjmcu_752.dtsi"

boards/shields/sc16is75x_bb/cjmcu_75x/core.dtsi

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&cjmcu_75x {
+	compatible = "nxp,sc16is75x";
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	clock = <&cjmcu_osc>;
+};

boards/shields/sc16is75x_bb/cjmcu_75x/gpio.dtsi

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	cjmcu_gpio: cjmcu-75x-gpio-pins {
+		compatible = "cjmcu,75x-gpio-header";
+		#gpio-cells = <2>;
+		gpio-map-mask = <0xffffffff 0xffffffc0>;
+		gpio-map-pass-thru = <0 0x3f>;
+		gpio-map = <0 0 &cjmcu_75x_gpio 0 0>,
+			   <1 0 &cjmcu_75x_gpio 1 0>,
+			   <2 0 &cjmcu_75x_gpio 2 0>,
+			   <3 0 &cjmcu_75x_gpio 3 0>,
+			   <4 0 &cjmcu_75x_gpio 4 0>,
+			   <5 0 &cjmcu_75x_gpio 5 0>,
+			   <6 0 &cjmcu_75x_gpio 6 0>,
+			   <7 0 &cjmcu_75x_gpio 7 0>;
+	};
+};
+
+&cjmcu_75x_gpio {
+	compatible = "nxp,sc16is75x-gpio";
+	status = "okay";
+
+	gpio-controller;
+	#gpio-cells = <2>;
+	ngpios = <8>;
+
+	gpio-line-names = "IO0", "IO1", "IO2", "IO3",
+			  "IO4", "IO5", "IO6", "IO7";
+};

boards/shields/sc16is75x_bb/cjmcu_75x/uart0.dtsi

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&cjmcu_75x_uart0 {
+	compatible = "nxp,sc16is75x-uart";
+	status = "okay";
+
+	reg = <0>;
+
+	current-speed = <115200>;
+	data-bits = <8>;
+	parity = "none";
+	stop-bits = "1";
+};

boards/shields/sc16is75x_bb/cjmcu_75x/uart1.dtsi

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2024 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&cjmcu_75x_uart1 {
+	compatible = "nxp,sc16is75x-uart";
+	status = "okay";
+
+	reg = <1>;
+
+	current-speed = <115200>;
+	data-bits = <8>;
+	parity = "none";
+	stop-bits = "1";
+};