wt., 21 cze 2022 o 13:42 Andy Shevchenko
[off-list ref] napisał(a):

On Tue, Jun 21, 2022 at 01:18:38PM +0200, Andrew Lunn wrote:

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On Tue, Jun 21, 2022 at 02:09:14PM +0300, Andy Shevchenko wrote:

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On Mon, Jun 20, 2022 at 09:47:31PM +0200, Andrew Lunn wrote:

...

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+        Name (_CRS, ResourceTemplate ()
+        {
+            Memory32Fixed (ReadWrite,
+                0xf212a200,
+                0x00000010,

What do these magic numbers mean?

Address + Length, it's all described in the ACPI specification.

The address+plus length of what? This device is on an MDIO bus. As
such, there is no memory! It probably makes sense to somebody who
knows ACPI, but to me i have no idea what it means.

I see what you mean. Honestly I dunno what the device this description is for.
For the DSA that's behind MDIO bus? Then it's definitely makes no sense and
MDIOSerialBus() resources type is what would be good to have in ACPI
specification.

It's not device on MDIO bus, but the MDIO controller's register itself
(this _CSR belongs to the parent, subnodes do not refer to it in any
way). The child device requires only _ADR (or whatever else is needed
for the case the DSA device is attached to SPI/I2C controllers).

Best regards,
Marcin