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Date: Mon, 16 Nov 2015 16:52:49 -0600
From: Benoit Parrot <bparrot@...com>
To: Rob Herring <robh@...nel.org>
CC: Hans Verkuil <hverkuil@...all.nl>, <linux-media@...r.kernel.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [Patch v4 2/2] media: v4l: ti-vpe: Document CAL driver
Rob Herring <robh@...nel.org> wrote on Mon [2015-Nov-16 09:26:16 -0600]:
> On Sun, Nov 15, 2015 at 05:53:48PM -0600, Benoit Parrot wrote:
> > Device Tree bindings for the Camera Adaptation Layer (CAL) driver
>
> Bindings are for h/w blocks, not drivers...
OK I'll fix that.
>
> >
> > Signed-off-by: Benoit Parrot <bparrot@...com>
> > ---
> > Documentation/devicetree/bindings/media/ti-cal.txt | 70 ++++++++++++++++++++++
> > 1 file changed, 70 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/media/ti-cal.txt
> >
> > diff --git a/Documentation/devicetree/bindings/media/ti-cal.txt b/Documentation/devicetree/bindings/media/ti-cal.txt
> > new file mode 100644
> > index 000000000000..680efadb6208
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/ti-cal.txt
> > @@ -0,0 +1,70 @@
> > +Texas Instruments DRA72x CAMERA ADAPTATION LAYER (CAL)
> > +------------------------------------------------------
> > +
> > +The Camera Adaptation Layer (CAL) is a key component for image capture
> > +applications. The capture module provides the system interface and the
> > +processing capability to connect CSI2 image-sensor modules to the
> > +DRA72x device.
> > +
> > +Required properties:
> > +- compatible: must be "ti,cal"
>
> Needs to be more specific.
See potential patch below.
>
> > +- reg: physical base address and length of the registers set for the 4
> > + memory regions required;
>
> Please list what the 4 regions are.
See potential patch below.
>
> > +- reg-names: name associated with the memory regions described is <reg>;
>
> Please list the names.
See potential patch below.
>
> > +- interrupts: should contain IRQ line for the CAL;
> > +
> > +CAL supports 2 camera port nodes on MIPI bus. Each CSI2 camera port nodes
> > +should contain a 'port' child node with child 'endpoint' node. Please
> > +refer to the bindings defined in
> > +Documentation/devicetree/bindings/media/video-interfaces.txt.
> > +
> > +Example:
> > + cal: cal@...5b000 {
> > + compatible = "ti,cal";
> > + ti,hwmods = "cal";
> > + reg = <0x4845B000 0x400>,
> > + <0x4845B800 0x40>,
> > + <0x4845B900 0x40>,
> > + <0x4A002e94 0x4>;
> > + reg-names = "cal_top",
> > + "cal_rx_core0",
> > + "cal_rx_core1",
> > + "camerrx_control";
> > + interrupts = <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH>;
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + csi2_0: port@0 {
>
> Multiple ports should be under a ports node.
The video-interfaces.txt bindings doc state:
"All 'port' nodes can be grouped under optional 'ports' node"
Doesn't that mean that 'ports' is then optional has show in the csi2
example provide in the same documents?
>
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + reg = <0>;
> > + endpoint {
> > + slave-mode;
> > + remote-endpoint = <&ar0330_1>;
> > + };
> > + };
> > + csi2_1: port@1 {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + reg = <1>;
> > + };
> > + };
> > +
> > + i2c5: i2c@...7c000 {
> > + ar0330@10 {
> > + compatible = "ti,ar0330";
> > + reg = <0x10>;
> > +
> > + port {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + ar0330_1: endpoint {
> > + reg = <0>;
> > + clock-lanes = <1>;
> > + data-lanes = <0 2 3 4>;
> > + remote-endpoint = <&csi2_0>;
> > + };
> > + };
> > + };
> > + };
> > --
> > 1.8.5.1
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe devicetree" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
Potential fix for the above comments:
diff --git a/Documentation/devicetree/bindings/media/ti-cal.txt b/Documentation/devicetree/bindings/media/ti-cal.txt
index 680efadb6208..ef6f88de38c0 100644
--- a/Documentation/devicetree/bindings/media/ti-cal.txt
+++ b/Documentation/devicetree/bindings/media/ti-cal.txt
@@ -7,10 +7,11 @@ processing capability to connect CSI2 image-sensor modules to the
DRA72x device.
Required properties:
-- compatible: must be "ti,cal"
-- reg: physical base address and length of the registers set for the 4
- memory regions required;
-- reg-names: name associated with the memory regions described is <reg>;
+- compatible: must be "ti,dra72-cal"
+- reg: CAL Top level, Receiver Core #0, Receiver Core #1 and Camera RX
+ control address space
+- reg-names: cal_top, cal_rx_core0, cal_rx_core1, and camerrx_control
+ registers
- interrupts: should contain IRQ line for the CAL;
CAL supports 2 camera port nodes on MIPI bus. Each CSI2 camera port nodes
@@ -20,7 +21,7 @@ Documentation/devicetree/bindings/media/video-interfaces.txt.
Example:
cal: cal@...5b000 {
- compatible = "ti,cal";
+ compatible = "ti,dra72-cal";
ti,hwmods = "cal";
reg = <0x4845B000 0x400>,
<0x4845B800 0x40>,
Regards,
Benoit
--
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