linux-kernel - [PATCH 2/2] ARM: dts: stm32: enable i2c1 and i2c5 on stm32mp135f-dk.dts

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Date:   Thu, 21 Jul 2022 17:29:33 +0200
From:   Alain Volmat <alain.volmat@...s.st.com>
To:     <alexandre.torgue@...s.st.com>
CC:     <robh+dt@...nel.org>, <mcoquelin.stm32@...il.com>,
        <krzysztof.kozlowski+dt@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <amelie.delaunay@...s.st.com>
Subject: [PATCH 2/2] ARM: dts: stm32: enable i2c1 and i2c5 on stm32mp135f-dk.dts

Enable the two i2c busses i2c1 and i2c5 available on the
stm32mp135f-dk Discovery board.

Signed-off-by: Alain Volmat <alain.volmat@...s.st.com>
---
 arch/arm/boot/dts/stm32mp13-pinctrl.dtsi | 34 ++++++++++++++++++++++++
 arch/arm/boot/dts/stm32mp135f-dk.dts     | 26 ++++++++++++++++++
 2 files changed, 60 insertions(+)

diff --git a/arch/arm/boot/dts/stm32mp13-pinctrl.dtsi b/arch/arm/boot/dts/stm32mp13-pinctrl.dtsi
index d2472cd8f1d0..749078ba9d42 100644
--- a/arch/arm/boot/dts/stm32mp13-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stm32mp13-pinctrl.dtsi
@@ -6,6 +6,40 @@
 #include <dt-bindings/pinctrl/stm32-pinfunc.h>
 
 &pinctrl {
+	i2c1_pins_a: i2c1-0 {
+		pins {
+			pinmux = <STM32_PINMUX('D', 12, AF5)>, /* I2C1_SCL */
+				 <STM32_PINMUX('E', 8, AF5)>; /* I2C1_SDA */
+			bias-disable;
+			drive-open-drain;
+			slew-rate = <0>;
+		};
+	};
+
+	i2c1_sleep_pins_a: i2c1-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('D', 12, ANALOG)>, /* I2C1_SCL */
+				 <STM32_PINMUX('E', 8, ANALOG)>; /* I2C1_SDA */
+		};
+	};
+
+	i2c5_pins_a: i2c5-0 {
+		pins {
+			pinmux = <STM32_PINMUX('D', 1, AF4)>, /* I2C5_SCL */
+				 <STM32_PINMUX('H', 6, AF4)>; /* I2C5_SDA */
+			bias-disable;
+			drive-open-drain;
+			slew-rate = <0>;
+		};
+	};
+
+	i2c5_sleep_pins_a: i2c5-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('D', 1, ANALOG)>, /* I2C5_SCL */
+				 <STM32_PINMUX('H', 6, ANALOG)>; /* I2C5_SDA */
+		};
+	};
+
 	sdmmc1_b4_pins_a: sdmmc1-b4-0 {
 		pins {
 			pinmux = <STM32_PINMUX('C', 8, AF12)>, /* SDMMC1_D0 */
diff --git a/arch/arm/boot/dts/stm32mp135f-dk.dts b/arch/arm/boot/dts/stm32mp135f-dk.dts
index e6b8ffd332c7..3e2823332d51 100644
--- a/arch/arm/boot/dts/stm32mp135f-dk.dts
+++ b/arch/arm/boot/dts/stm32mp135f-dk.dts
@@ -68,6 +68,32 @@ vdd_sd: vdd-sd {
 	};
 };
 
+&i2c1 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&i2c1_pins_a>;
+	pinctrl-1 = <&i2c1_sleep_pins_a>;
+	i2c-scl-rising-time-ns = <96>;
+	i2c-scl-falling-time-ns = <3>;
+	clock-frequency = <1000000>;
+	status = "okay";
+	/* spare dmas for other usage */
+	/delete-property/dmas;
+	/delete-property/dma-names;
+};
+
+&i2c5 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&i2c5_pins_a>;
+	pinctrl-1 = <&i2c5_sleep_pins_a>;
+	i2c-scl-rising-time-ns = <170>;
+	i2c-scl-falling-time-ns = <5>;
+	clock-frequency = <400000>;
+	status = "okay";
+	/* spare dmas for other usage */
+	/delete-property/dmas;
+	/delete-property/dma-names;
+};
+
 &iwdg2 {
 	timeout-sec = <32>;
 	status = "okay";
-- 
2.25.1