J721E SK has the CSI2RX routed to a MIPI CSI connector and to 15-pin
RPi camera connector through an analog mux with GPIO control, model that
so that an overlay can control the mux state according to connected
cameras. Also provide labels to the I2C mux bus instances so that a
generic overlay can be used across multiple platforms.
J721E SK schematics: https://www.ti.com/lit/zip/sprr438
Signed-off-by: Vaishnav Achath <[email protected]>
---
V1->V2: Update commit message with schematics.
arch/arm64/boot/dts/ti/k3-j721e-sk.dts | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/ti/k3-j721e-sk.dts b/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
index 6950b1ff124f..5dbc85bc5038 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
@@ -286,6 +286,15 @@ tfp410_out: endpoint {
};
};
};
+
+ csi_mux: mux-controller {
+ compatible = "gpio-mux";
+ #mux-state-cells = <1>;
+ mux-gpios = <&main_gpio0 88 GPIO_ACTIVE_HIGH>;
+ idle-state = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&main_csi_mux_sel_pins_default>;
+ };
};
&main_pmx0 {
@@ -352,6 +361,12 @@ J721E_IOPAD(0x214, PIN_OUTPUT, 4) /* (V4) MCAN1_TX.USB1_DRVVBUS */
>;
};
+ main_csi_mux_sel_pins_default: main-csi-mux-sel-default-pins {
+ pinctrl-single,pins = <
+ J721E_IOPAD(0x164, PIN_OUTPUT, 7) /* (V29) RGMII5_TD2 */
+ >;
+ };
+
dp0_pins_default: dp0-default-pins {
pinctrl-single,pins = <
J721E_IOPAD(0x1c4, PIN_INPUT, 5) /* SPI0_CS1.DP0_HPD */
@@ -858,14 +873,14 @@ i2c-mux@70 {
reg = <0x70>;
/* CSI0 I2C */
- i2c@0 {
+ cam0_i2c: i2c@0 {
#address-cells = <1>;
#size-cells = <0>;
reg = <0>;
};
/* CSI1 I2C */
- i2c@1 {
+ cam1_i2c: i2c@1 {
#address-cells = <1>;
#size-cells = <0>;
reg = <1>;
--
2.34.1
On Feb 08, 2024 at 14:12:50 +0530, Vaishnav Achath wrote:
> J721E SK has the CSI2RX routed to a MIPI CSI connector and to 15-pin
> RPi camera connector through an analog mux with GPIO control, model that
> so that an overlay can control the mux state according to connected
> cameras. Also provide labels to the I2C mux bus instances so that a
> generic overlay can be used across multiple platforms.
>
> J721E SK schematics: https://www.ti.com/lit/zip/sprr438
>
> Signed-off-by: Vaishnav Achath <[email protected]>
Reviewed-by: Jai Luthra <[email protected]>
> ---
>
> V1->V2: Update commit message with schematics.
>
> arch/arm64/boot/dts/ti/k3-j721e-sk.dts | 19 +++++++++++++++++--
> 1 file changed, 17 insertions(+), 2 deletions(-)
>
> [...]
--
Thanks,
Jai
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