CSI cameras are controlled using I2C. On AM68 Starter Kit, this is routed
to I2C-1, so enable the instance and the TCA9543 I2C switch on the bus.
AM68 SK schematics: https://www.ti.com/lit/zip/sprr463
Signed-off-by: Vaishnav Achath <[email protected]>
Reviewed-by: Jai Luthra <[email protected]>
---
V1->V2: Update commit message with schematics.
.../boot/dts/ti/k3-am68-sk-base-board.dts | 50 +++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts b/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts
index f48155dd16a3..d743f023cdd9 100644
--- a/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts
@@ -169,6 +169,13 @@ tfp410_out: endpoint {
};
};
};
+
+ csi_mux: mux-controller {
+ compatible = "gpio-mux";
+ #mux-state-cells = <1>;
+ mux-gpios = <&exp3 1 GPIO_ACTIVE_HIGH>;
+ idle-state = <0>;
+ };
};
&main_pmx0 {
@@ -186,6 +193,13 @@ J721S2_IOPAD(0x0e4, PIN_INPUT, 0) /* (AE24) I2C0_SDA */
>;
};
+ main_i2c1_pins_default: main-i2c1-default-pins {
+ pinctrl-single,pins = <
+ J721S2_IOPAD(0x0ac, PIN_INPUT, 13) /* (AC25) MCASP0_AXR15.I2C1_SCL */
+ J721S2_IOPAD(0x0b0, PIN_INPUT, 13) /* (AD26) MCASP1_AXR3.I2C1_SDA */
+ >;
+ };
+
main_mmc1_pins_default: main-mmc1-default-pins {
pinctrl-single,pins = <
J721S2_IOPAD(0x104, PIN_INPUT, 0) /* (P23) MMC1_CLK */
@@ -431,6 +445,42 @@ exp1: gpio@21 {
};
};
+&main_i2c1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&main_i2c1_pins_default>;
+ status = "okay";
+
+ exp3: gpio@20 {
+ compatible = "ti,tca6408";
+ reg = <0x20>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ gpio-line-names = "CSI_VIO_SEL", "CSI_SEL_FPC_EXPn",
+ "IO_EXP_CSI2_EXP_RSTz","CSI0_B_GPIO1",
+ "CSI1_B_GPIO1";
+ };
+
+ i2c-mux@70 {
+ compatible = "nxp,pca9543";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x70>;
+
+ cam0_i2c: i2c@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0>;
+ };
+
+ cam1_i2c: i2c@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <1>;
+ };
+
+ };
+};
+
&main_i2c4 {
status = "okay";
pinctrl-names = "default";
--
2.34.1