drivers: i2c: Add driver for smartbond DA1469x device family

This adds the i2c driver for the Renesas SmartBond(tm) MCU family.
It supports blocking transfers and callback transfers.
Currently only supports controller mode.

Co-authored-by: Stan Geitel <stan@geitel.nl>

Signed-off-by: Ben Lauret <ben.lauret.wm@renesas.com>

Author: blauret

boards/arm/da1469x_dk_pro/da1469x_dk_pro-pinctrl.dtsi

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Renesas Electronics Corporation
+ * Copyright (c) 2022 Renesas Electronics Corporation and/or its affiliates
  * SPDX-License-Identifier: Apache-2.0
  */
 
@@ -15,4 +15,20 @@
 			bias-pull-up;
 		};
 	};
+
+	i2c_default: i2c_default {
+		group1 {
+			pinmux = <SMARTBOND_PINMUX(I2C_SDA, 0, 31)>,
+				<SMARTBOND_PINMUX(I2C_SCL, 0, 30)>;
+			bias-pull-up;
+		};
+	};
+
+	i2c2_default: i2c2_default {
+		group1 {
+			pinmux = <SMARTBOND_PINMUX(I2C2_SDA, 0, 19)>,
+				<SMARTBOND_PINMUX(I2C2_SCL, 0, 18)>;
+			bias-pull-up;
+		};
+	};
 };

boards/arm/da1469x_dk_pro/da1469x_dk_pro.dts

@@ -138,3 +138,14 @@
 &pll {
 	status = "okay";
 };
+&i2c {
+	status = "okay";
+	pinctrl-0 = <&i2c_default>;
+	pinctrl-names = "default";
+};
+
+&i2c2 {
+	status = "okay";
+	pinctrl-0 = <&i2c2_default>;
+	pinctrl-names = "default";
+};

boards/arm/da1469x_dk_pro/da1469x_dk_pro.yaml

@@ -11,3 +11,4 @@ supported:
   - arduino_gpio
   - gpio
   - watchdog
+  - i2c

boards/arm/da1469x_dk_pro/da1469x_dk_pro_defconfig

@@ -13,3 +13,6 @@ CONFIG_UART_CONSOLE=y
 CONFIG_SERIAL=y
 
 CONFIG_BUILD_OUTPUT_HEX=n
+
+CONFIG_I2C=y
+CONFIG_I2C_CALLBACK=y

drivers/i2c/CMakeLists.txt

@@ -40,6 +40,7 @@ zephyr_library_sources_ifdef(CONFIG_I2C_XEC_V2		i2c_mchp_xec_v2.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_GD32		i2c_gd32.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_ANDES_ATCIIC100		i2c_andes_atciic100.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_SC18IM704	i2c_sc18im704.c)
+zephyr_library_sources_ifdef(CONFIG_I2C_SMARTBOND	i2c_smartbond.c)
 
 zephyr_library_sources_ifdef(CONFIG_I2C_STM32_V1
 	i2c_ll_stm32_v1.c

drivers/i2c/Kconfig

@@ -65,6 +65,7 @@ source "drivers/i2c/Kconfig.tca954x"
 source "drivers/i2c/Kconfig.gd32"
 source "drivers/i2c/Kconfig.andes_atciic100"
 source "drivers/i2c/Kconfig.sc18im704"
+source "drivers/i2c/Kconfig.smartbond"
 
 config I2C_INIT_PRIORITY
 	int "Init priority"

drivers/i2c/Kconfig.smartbond

@@ -0,0 +1,9 @@
+# Copyright (c) 2022 Renesas Electronics Corporation and/or its affiliates
+# SPDX-License-Identifier: Apache-2.0
+
+config I2C_SMARTBOND
+	bool "Renesas SmartBond(tm) I2C driver"
+	default y
+	depends on DT_HAS_RENESAS_SMARTBOND_I2C_ENABLED
+	help
+	  Enable I2C driver for Renesas SmartBond(tm) DA1469x series MCU.