Hi Tony,
On Wed, Nov 20, 2013 at 05:38:59PM -0800, Tony Lindgren wrote:
> * Sebastian Reichel <sre@xxxxxxxxxx> [130915 13:56]:
> > +
> > +Example for Nokia N900:
> > +
> > +ssi-controller@48058000 {
> > + compatible = "ti,omap3-ssi";
> > + ti,hwmods = "ssi";
> > +
> > + reg = <0x48058000 0x1000>,
> > + <0x48059000 0x1000>;
> > + reg-names = "sys",
> > + "gdd";
> > +
> > + interrupts = <55>;
> > + interrupt-names = "gdd_mpu";
> > +
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + ranges;
> > +
> > + ssi-port@0 {
> > + compatible = "ti,omap3-ssi-port";
> > +
> > + reg = <0x4805a000 0x800>,
> > + <0x4805a800 0x800>;
> > + reg-names = "tx",
> > + "rx";
> > +
> > + interrupt-parent = <&intc>;
> > + interrupts = <51>,
> > + <52>;
> > + interrupt-names = "mpu_irq0",
> > + "mpu_irq1";
> > +
> > + ti,ssi-cawake-gpio = <&gpio5 23 GPIO_ACTIVE_HIGH>; /* 151 */
> > + }
> > +}
>
> These should be in the omap3.dtsi file and not nested but separate. I'm almost
> certain that these are completely independent hardware modules and this
> means they can live their own PM life independently.
>
> So can you please do a minimal patch for omap3.dtsi that just sets up
> the standard resources separately for both modules the same way we have
> for other hardware modules in omap3.dtsi do?
>
> One of them should be called ssi, no idea what the other module name should
> be as those register ranges show up as reserved in the docs I have.
In the public documentation of the omaps all SSI related stuff is
missing and memory areas are marked as reserved. I could not find
out how to receive the NDA version, so the following is purely
speculation based on the code.
If I understand it right the HW looks like this:
+-----------------+
| GDD (DMA) | <- this one is currently called ssi-controller
+--------+--------+
| Port 1 | Port 2 | <- these are currently called ssi-port
+--------+--------+
I think the GDD part must be enabled while Port 1 or Port 2 is
enabled. The last RFC driver from Carlos did not even split up the
irq/memory areas into different platform devices, but just requested
all of them in one ssi platform device.
> The other binding pieces can be added later on as they get are ready.
Sure. They are almost finished btw. I was able to get a gsm network
scan.
-- Sebastian
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