From c78acb75e491008bbddfe1c3418cd6e925a62bd5 Mon Sep 17 00:00:00 2001
From: Pavlo Hamov <pavlo_hamov@jabil.com>
Date: Fri, 26 Jul 2019 01:02:43 +0300
Subject: [PATCH] boards: stm32_min_dev enable I2C_2

Add support of i2c peripheral for mini_dev boards

Signed-off-by: Pavlo Hamov <pavlo_hamov@jabil.com>
---
 boards/arm/stm32_min_dev/Kconfig.defconfig  |  3 +++
 boards/arm/stm32_min_dev/doc/index.rst      | 10 ++++++++++
 boards/arm/stm32_min_dev/pinmux.c           |  4 ++++
 boards/arm/stm32_min_dev/stm32_min_dev.dtsi |  5 +++++
 4 files changed, 22 insertions(+)

diff --git a/boards/arm/stm32_min_dev/Kconfig.defconfig b/boards/arm/stm32_min_dev/Kconfig.defconfig
index a202702df68..5b6b319bfec 100644
--- a/boards/arm/stm32_min_dev/Kconfig.defconfig
+++ b/boards/arm/stm32_min_dev/Kconfig.defconfig
@@ -23,6 +23,9 @@ if I2C
 config I2C_1
 	default y
 
+config I2C_2
+	default y
+
 endif # I2C
 
 if PWM
diff --git a/boards/arm/stm32_min_dev/doc/index.rst b/boards/arm/stm32_min_dev/doc/index.rst
index 7d9313aebd8..29ea9bfc976 100644
--- a/boards/arm/stm32_min_dev/doc/index.rst
+++ b/boards/arm/stm32_min_dev/doc/index.rst
@@ -108,6 +108,16 @@ The stm32_min_dev board configuration supports the following hardware features:
 
 Other hardware features are not supported by the Zephyr kernel.
 
+I2C
+===
+
+The STM32 Minimum Development Board board supports two I2C devices. The default
+I2C mapping for Zephyr is:
+
+- I2C1_SCL : PB6
+- I2C1_SDA : PB7
+- I2C2_SCL : PB10
+- I2C2_SDA : PB11
 
 Programming and Debugging
 *************************
diff --git a/boards/arm/stm32_min_dev/pinmux.c b/boards/arm/stm32_min_dev/pinmux.c
index 0483ca8eb2f..d9651266383 100644
--- a/boards/arm/stm32_min_dev/pinmux.c
+++ b/boards/arm/stm32_min_dev/pinmux.c
@@ -30,6 +30,10 @@ static const struct pin_config pinconf[] = {
 	{STM32_PIN_PB6, STM32F1_PINMUX_FUNC_PB6_I2C1_SCL},
 	{STM32_PIN_PB7, STM32F1_PINMUX_FUNC_PB7_I2C1_SDA},
 #endif /* CONFIG_I2C_1 */
+#ifdef CONFIG_I2C_2
+	{STM32_PIN_PB10, STM32F1_PINMUX_FUNC_PB10_I2C2_SCL},
+	{STM32_PIN_PB11, STM32F1_PINMUX_FUNC_PB11_I2C2_SDA},
+#endif /* CONFIG_I2C_2 */
 #ifdef CONFIG_PWM_STM32_1
 	{STM32_PIN_PA8, STM32F1_PINMUX_FUNC_PA8_PWM1_CH1},
 #endif /* CONFIG_PWM_STM32_1 */
diff --git a/boards/arm/stm32_min_dev/stm32_min_dev.dtsi b/boards/arm/stm32_min_dev/stm32_min_dev.dtsi
index 8f28c9749c3..9910042bfea 100644
--- a/boards/arm/stm32_min_dev/stm32_min_dev.dtsi
+++ b/boards/arm/stm32_min_dev/stm32_min_dev.dtsi
@@ -55,6 +55,11 @@
 	clock-frequency = <I2C_BITRATE_FAST>;
 };
 
+&i2c2 {
+	status = "okay";
+	clock-frequency = <I2C_BITRATE_FAST>;
+};
+
 &spi1 {
 	status = "okay";
 };