Hi Peter,

On Wed, Oct 11, 2017 at 06:54:04PM +0300, Peter Ujfalusi wrote:

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

On 09/30/2017 01:34 AM, Tony Lindgren wrote:

quoted

On omap4 we are missing dts nodes for several interconnect target
modules that we are idling on init. This currently works with the
legacy platform data still around.

To fix this, let's add the interconnect target modules so we can
idle the unused interconnect target module on init.

Also note that adding the interconnect target module node does not
necessarily mean that there is a driver available for the child IP
block, or that the child IP block is even functional.

In the SGX case, the PowerVR driver is closed source. And McASP on
omap4 has at least the TX path disabled and is not supported by the
davinci-mcasp driver.

RX path is disabled, TX is supposed to work.

...

quoted

+		target-module at 40128000 {
+			compatible = "ti,sysc-mcasp";
+			ti,hwmods = "mcasp";
+			reg = <0x40128004 0x4>;
+			reg-names = "sysc";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0x00000000 0x40128000 0x1000>, /* MPU */
+				 <0x49028000 0x49028000 0x1000>; /* L3 */
+
+			/*
+			 * Child device unsupported by davinci-mcasp. At least
+			 * TX path is disabled for omap4, and only DIT mode

s/TX/RX

quoted

+			 * works with no I2S. See also old Android kernel
+			 * omap-mcasp driver for more information.

I'll look at the schema of PandaBoard to see if I can route out the McASP
lines to somewhere then I can add support for this revision to davinci-mcasp
driver.

Not sure if this is helpful information:

Motorola Droid 4 is OMAP4430 based and has McASP lines routed
to the audio codec (either McASP or McBSP can be used). Codec
is a custom one, which is not yet supported mainline, but
patches are WIP (*):

https://lkml.org/lkml/2017/7/12/368

(*) My patches use McBSP instead of McASP, since McASP looked
mostly unsupported. Motorola's kernel uses McASP.

-- Sebastian
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