[RFC PATCH v2 5/7] ARM: dts: bcm2711: Add unicam CSI nodes

[Laurent Pinchart]

Hi Jean-Michel,

Thank you for the patch.

On Fri, Jan 21, 2022 at 09:18:08AM +0100, Jean-Michel Hautbois wrote:
> Add both MIPI CSI-2 nodes in the core bcm2711 tree. Use the 3-cells
> interrupt declaration, corresponding clocks and default as disabled.
> 
> Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois at ideasonboard.com>
> ---
>  arch/arm/boot/dts/bcm2711.dtsi | 31 +++++++++++++++++++++++++++++++
>  1 file changed, 31 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi
> index dff18fc9a906..077141df7024 100644
> --- a/arch/arm/boot/dts/bcm2711.dtsi
> +++ b/arch/arm/boot/dts/bcm2711.dtsi
> @@ -3,6 +3,7 @@
>  
>  #include <dt-bindings/interrupt-controller/arm-gic.h>
>  #include <dt-bindings/soc/bcm2835-pm.h>
> +#include <dt-bindings/power/raspberrypi-power.h>
>  
>  / {
>  	compatible = "brcm,bcm2711";
> @@ -293,6 +294,36 @@ hvs: hvs at 7e400000 {
>  			interrupts = <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>;
>  		};
>  
> +		csi0: csi1 at 7e800000 {

The node name should be csi at 7e800000, not csi1 at 7e800000. Now, this will
probably cause issues with the firmware that looks for csi1 (and csi0 ?)
to hand over control of the Unicam CSI-2 receiver to the kernel. I
wonder if this is something that could be handled by a firmware update,
to also recognize nodes named "csi" ?

> +			compatible = "brcm,bcm2835-unicam";
> +			reg = <0x7e800000 0x800>,
> +			      <0x7e802000 0x4>;
> +			interrupts = <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&clocks BCM2835_CLOCK_CAM0>,
> +				 <&firmware_clocks 4>;
> +			clock-names = "lp", "vpu";
> +			power-domains = <&power RPI_POWER_DOMAIN_UNICAM0>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			#clock-cells = <1>;

Why do you need #address-cells, #size-cells and #clock-cells ? They're
not mentioned in the binding.

> +			status="disabled";

Missing spaces around the =.

Same comment for the next node.

> +		};
> +
> +		csi1: csi1 at 7e801000 {
> +			compatible = "brcm,bcm2835-unicam";
> +			reg = <0x7e801000 0x800>,
> +			      <0x7e802004 0x4>;
> +			interrupts = <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&clocks BCM2835_CLOCK_CAM1>,
> +				 <&firmware_clocks 4>;
> +			clock-names = "lp", "vpu";
> +			power-domains = <&power RPI_POWER_DOMAIN_UNICAM1>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			#clock-cells = <1>;
> +			status="disabled";
> +		};
> +
>  		pixelvalve3: pixelvalve at 7ec12000 {
>  			compatible = "brcm,bcm2711-pixelvalve3";
>  			reg = <0x7ec12000 0x100>;

-- 
Regards,

Laurent Pinchart