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@xxxxxx> Reviewed-by: Jai Luthra <j-luthra@xxxxxx> --- 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
