Hi Andy,

On Mon, Jun 07, 2021 at 12:02:37PM +0300, Andy Shevchenko wrote:

On Sun, Jun 06, 2021 at 11:30:54PM +0200, Uwe Kleine-König wrote:

quoted

Hello Andy,

On Mon, May 31, 2021 at 10:49:42PM +0300, Andy Shevchenko wrote:

quoted

It makes little sense to make PWM flags optional since in case
of multi-channel consumer the flags can be optional only for
the last listed channel.

I think the same holds true for dt references.

Can you elaborate this? I haven't got what you are talking about, not a DT
expert here.

Ah no, I mixed that up. While the function that parses the phandle is
flexible, for each pwm controller the number of arguments is fixed, so

	pwms = <&pwm1 100000 &pwm2 100000 &pwm3 1000000>;

cannot be interpreted as 3-argument references to two PWMs. This is
different to ACPI (I guess, not an ACPI expert here :-) because &pwm1
"knows" if it needs 1 or 2 additional parameters (#pwm-cells).

Best regards
Uwe

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Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |