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From: Vaishnav Achath <vaishnav.a@ti.com>
To: <vigneshr@ti.com>, <nm@ti.com>, <conor+dt@kernel.org>, <kristo@kernel.org>,
        <krzysztof.kozlowski+dt@linaro.org>, <robh+dt@kernel.org>
CC: <j-luthra@ti.com>, <devicetree@vger.kernel.org>, <j-choudhary@ti.com>,
        <kernel@pengutronix.de>, <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <u-kumar1@ti.com>, <vaishnav.a@ti.com>,
        <afd@ti.com>
Subject: [PATCH v2 1/9] arm64: dts: ti: k3-j721s2-common-proc-board: Enable camera peripherals
Date: Thu, 8 Feb 2024 14:12:46 +0530
Message-ID: <20240208084254.295289-2-vaishnav.a@ti.com>
In-Reply-To: <20240208084254.295289-1-vaishnav.a@ti.com>
References: <20240208084254.295289-1-vaishnav.a@ti.com>
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CSI cameras are controlled using I2C. On J721S2 Common Processor Board,
this is routed to I2C-5, so enable the instance and the TCA6408
GPIO expander on the bus.

Common Processor Board schematics: https://www.ti.com/lit/zip/sprr411
J721S2 SoM schematics: https://www.ti.com/lit/zip/sprr439

Signed-off-by: Vaishnav Achath <vaishnav.a@ti.com>
---

V1->V2: Update commit message with schematics.

 .../dts/ti/k3-j721s2-common-proc-board.dts    | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
index 361365bb5523..5631735c9b7a 100644
--- a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
@@ -147,6 +147,13 @@ J721S2_IOPAD(0x060, PIN_INPUT_PULLUP, 13) /* (AC27) MCASP2_AXR1.I2C3_SDA */
 		>;
 	};
 
+	main_i2c5_pins_default: main-i2c5-default-pins {
+		pinctrl-single,pins = <
+			J721S2_IOPAD(0x01c, PIN_INPUT, 8) /* (Y24) MCAN15_TX.I2C5_SCL */
+			J721S2_IOPAD(0x018, PIN_INPUT, 8) /* (W23) MCAN14_RX.I2C5_SDA */
+		>;
+	};
+
 	main_mmc1_pins_default: main-mmc1-default-pins {
 		pinctrl-single,pins = <
 			J721S2_IOPAD(0x104, PIN_INPUT, 0) /* (P23) MMC1_CLK */
@@ -356,6 +363,24 @@ exp2: gpio@22 {
 	};
 };
 
+&main_i2c5 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_i2c5_pins_default>;
+	clock-frequency = <400000>;
+	status = "okay";
+
+	exp5: gpio@20 {
+		compatible = "ti,tca6408";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names = "CSI2_EXP_RSTZ", "CSI2_EXP_A_GPIO0",
+				  "CSI2_EXP_A_GPIO1", "CSI2_EXP_A_GPIO2",
+				  "CSI2_EXP_B_GPIO1", "CSI2_EXP_B_GPIO2",
+				  "CSI2_EXP_B_GPIO3", "CSI2_EXP_B_GPIO4";
+	};
+};
+
 &main_sdhci0 {
 	/* eMMC */
 	status = "okay";
-- 
2.34.1