linux-kernel - [PATCH v3 3/3] riscv: dts: thead: Enable I2C on the BeagleV-Ahead

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Message-Id: <20240618-i2c-th1520-v3-3-3042590a16b1@bootlin.com>
Date: Tue, 18 Jun 2024 09:42:40 +0200
From: Thomas Bonnefille <thomas.bonnefille@...tlin.com>
To: Andi Shyti <andi.shyti@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Jisheng Zhang <jszhang@...nel.org>, 
 Guo Ren <guoren@...nel.org>, Fu Wei <wefu@...hat.com>, 
 Drew Fustini <dfustini@...storrent.com>, 
 Emil Renner Berthing <emil.renner.berthing@...onical.com>, 
 Conor Dooley <conor@...nel.org>, 
 Jarkko Nikula <jarkko.nikula@...ux.intel.com>
Cc: Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
 Paul Walmsley <paul.walmsley@...ive.com>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 Miquèl Raynal <miquel.raynal@...tlin.com>, 
 linux-i2c@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org, 
 Thomas Bonnefille <thomas.bonnefille@...tlin.com>
Subject: [PATCH v3 3/3] riscv: dts: thead: Enable I2C on the BeagleV-Ahead

This commit enables the I2C0 controller of the TH1520, together with
the FT24C32A EEPROM that is connected to it.
In addition, this commit also enables the I2C controllers I2C2, I2C4
and I2C5 as they are all three exposed on headers (P9 19 and 20 for I2C2,
P9 17 and 18 for I2C5 and MikroBus 7 and 5 for I2C4).
It also defined the required pinctrl nodes.

Signed-off-by: Thomas Bonnefille <thomas.bonnefille@...tlin.com>
---
 arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts | 84 ++++++++++++++++++++++
 1 file changed, 84 insertions(+)

diff --git a/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts b/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts
index 57a2578123eb..b5c4f1811955 100644
--- a/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts
+++ b/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts
@@ -122,6 +122,19 @@ led-pins {
 };
 
 &padctrl0_apsys {
+	i2c2_pins: i2c2-0 {
+		i2c-pins {
+			pins = "I2C2_SDA",
+			       "I2C2_SCL";
+			function = "i2c";
+			bias-pull-up = <48000>;
+			drive-strength = <7>;
+			input-enable;
+			input-schmitt-enable;
+			slew-rate = <0>;
+		};
+	};
+
 	uart0_pins: uart0-0 {
 		tx-pins {
 			pins = "UART0_TXD";
@@ -145,8 +158,79 @@ rx-pins {
 	};
 };
 
+&padctrl1_apsys {
+	i2c0_pins: i2c0-0 {
+		i2c-pins {
+			pins = "I2C0_SDA",
+			       "I2C0_SCL";
+			function = "i2c";
+			bias-pull-up = <48000>;
+			drive-strength = <7>;
+			input-enable;
+			input-schmitt-enable;
+			slew-rate = <0>;
+		};
+	};
+
+	i2c4_pins: i2c4-0 {
+		i2c-pins {
+			pins = "GPIO0_19", /* I2C4_SDA */
+			       "GPIO0_18"; /* I2C4_SCL */
+			function = "i2c";
+			bias-pull-up = <48000>;
+			drive-strength = <7>;
+			input-enable;
+			input-schmitt-enable;
+			slew-rate = <0>;
+		};
+	};
+
+	i2c5_pins: i2c5-0 {
+		i2c-pins {
+			pins = "QSPI1_D0_MOSI", /* I2C5_SDA */
+			       "QSPI1_CSN0";    /* I2C5_SCL */
+			function = "i2c";
+			bias-pull-up = <48000>;
+			drive-strength = <7>;
+			input-enable;
+			input-schmitt-enable;
+			slew-rate = <0>;
+		};
+	};
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pins>;
 	status = "okay";
 };
+
+&i2c0 {
+	clock-frequency = <100000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c0_pins>;
+	status = "okay";
+
+	eeprom@50 {
+		compatible = "atmel,24c32";
+		reg = <0x50>;
+	};
+};
+
+&i2c2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c2_pins>;
+	status = "okay";
+};
+
+&i2c4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c4_pins>;
+	status = "okay";
+};
+
+&i2c5 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c5_pins>;
+	status = "okay";
+};

-- 
2.45.2