Hi Rob,

On Fri, May 21, 2021 at 8:24 PM Rob Herring [off-list ref] wrote:

On Fri, May 21, 2021 at 12:23:47PM +0200, Geert Uytterhoeven wrote:

quoted

On Fri, May 21, 2021 at 12:04 PM Linus Walleij [off-list ref] wrote:

quoted

On Fri, May 21, 2021 at 9:54 AM Geert Uytterhoeven
[off-list ref] wrote:

quoted

Convert the PCF857x-compatible I/O expanders Device Tree binding
documentation to json-schema.

Document missing compatible values, properties, and gpio hogs.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

(...)

quoted

Perhaps the "ti,pcf8575" construct should be removed, and the few users
fixed instead?

You would rather list it as deprecated I think?
It is ABI...

All DTS files use the "nxp,pcf8575" fallback, except for
arch/x86/platform/ce4100/falconfalls.dts.
The latter ain't working with Linux, as the Linux driver doesn't
match against "ti,pcf8575"...

Correction: i2c_device_id-based matching ignores the vendor part
of the compatible value.  One day this is gonna bite us...

Perhaps can it just be removed?

I think so.  All other users of similar I2C GPIO expanders just
use the compatible values of the original NXP parts.

quoted

quoted

quoted

+patternProperties:
+  "^(hog-[0-9]+|.+-hog(-[0-9]+)?)$":
+    type: object

But this is already in
/dtschema/schemas/gpio/gpio-hog.yaml
for nodename, isn't that where it properly belongs?

I'm however confused here Rob will know what to do.

This one is a bit odd.

quoted

If we leave this out, something still has to refer to it?
I see no other binding doing that...

It's selected by 'gpio-hog' being present, but here you need to make
sure that's the case.

OK. Fixed.

And I would hope you could define the node name to be just 1 of the 2
cases.

Yep, the latter is fine.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

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