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SubjectRe: [PATCHv3 09/14] Documentation: DT: omap-ssi binding documentation
Hi,

On Mon, Apr 21, 2014 at 11:43:47AM -0500, Rob Herring wrote:
> On Fri, Mar 28, 2014 at 7:31 PM, Sebastian Reichel <sre@kernel.org> wrote:
> > Create device tree binding documentation for
> > OMAP Synchronous Serial Interface (SSI) device.
> >
> > Signed-off-by: Sebastian Reichel <sre@kernel.org>
> > ---
> > Documentation/devicetree/bindings/hsi/omap-ssi.txt | 85 ++++++++++++++++++++++
> > 1 file changed, 85 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/hsi/omap-ssi.txt
> >
> > diff --git a/Documentation/devicetree/bindings/hsi/omap-ssi.txt b/Documentation/devicetree/bindings/hsi/omap-ssi.txt
> > new file mode 100644
> > index 0000000..709419b
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/hsi/omap-ssi.txt
> > @@ -0,0 +1,85 @@
> > +OMAP SSI controller bindings
> > +
> > +OMAP Synchronous Serial Interface (SSI) controller implements a legacy
> > +variant of MIPI's High Speed Synchronous Serial Interface (HSI).
> > +
> > +Required properties:
> > +- compatible: Should include "ti,omap3-ssi".
> > +- reg-names: Contains the values "sys" and "gdd".
> > +- reg: Contains a register specifier for each entry in
> > + reg-names.
>
> You need to define the order here unless you have a strong
> argument why you can't.

ok.

> > +- interrupt-names: Contains the value "gdd_mpu".
> > +- interrupts: Contains interrupt information for each entry in
> > + interrupt-names.
> > +- ranges: Represents the bus address mapping between the main
> > + controller node and the child nodes below.
> > +- clocks: Contains clock specifiers for each entry in
> > + clock-names.
> > +- clock-names: Must include the following entries:
> > + "ssi_ssr_fck": The OMAP clock of that name
> > + "ssi_sst_fck": The OMAP clock of that name
> > + "ssi_ick": The OMAP clock of that name
> > +- #address-cells: Should be set to <1>
> > +- #size-cells: Should be set to <1>
> > +
> > +Each port is represented as a sub-node of the ti,omap3-ssi device.
> > +
> > +Required Port sub-node properties:
> > +- compatible: Should be set to the following value
> > + ti,omap3-ssi-port (applicable to OMAP34xx devices)
> > +- reg-names: Contains the values "rx" and "tx".
> > +- reg: Contains a register specifier for each entry in
> > + reg-names.
>
> You need to define the order here unless you have a strong argument
> why you can't.

ok.

> > +- interrupt-parent Should be a phandle for the interrupt controller
> > +- interrupt-names: Contains the values "mpu_irq0" and "mpu_irq1".
>
> Those names aren't exactly useful.

I removed interrupt-names in PATCHv4.

> > +- interrupts: Contains interrupt information for each entry in
> > + interrupt-names.
>
> You need to define the order here unless you have a strong argument
> why you can't.

ok.

> > +- ti,ssi-cawake-gpio: Defines which GPIO pin is used to signify CAWAKE
> > + events for the port. This is an optional board-specific
> > + property. If it's missing the port will not be
> > + enabled.
> > +
> > +Example for Nokia N900:
> > +
> > +ssi-controller@48058000 {
> > + compatible = "ti,omap3-ssi";
> > +
> > + /* needed until hwmod is updated to use the compatible string */
> > + ti,hwmods = "ssi";
> > +
> > + reg = <0x48058000 0x1000>,
> > + <0x48059000 0x1000>;
> > + reg-names = "sys",
> > + "gdd";
> > +
> > + interrupts = <55>;
> > + interrupt-names = "gdd_mpu";
> > +
> > + clocks = <&ssi_ssr_fck>,
> > + <&ssi_sst_fck>,
> > + <&ssi_ick>;
> > + clock-names = "ssi_ssr_fck",
> > + "ssi_sst_fck",
> > + "ssi_ick";
> > +
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + ranges;
> > +
> > + ssi-port@0 {
>
> Does this h/w really have more than 1 port?

Yes. I added this to the example in PATCHv4.

> This should really be "ssi-port@4805a800" Or you need to fill in
> ranges to have a local offset.

ok.

>> [...]

-- Sebastian
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