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Date:      Mon, 22 Jan 2018 09:02:24 +0000
From:      "Poul-Henning Kamp" <phk@phk.freebsd.dk>
To:        Emmanuel Vadot <manu@bidouilliste.com>
Cc:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   Re: svn commit: r328257 - in head/sys: arm/broadcom/bcm2835 dts/arm modules
Message-ID:  <86939.1516611744@critter.freebsd.dk>
In-Reply-To: <20180122094629.f292f9f239174f0865b046ea@bidouilliste.com>
References:  <201801220710.w0M7AUm9091853@repo.freebsd.org> <20180122094629.f292f9f239174f0865b046ea@bidouilliste.com>

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--------
In message <20180122094629.f292f9f239174f0865b046ea@bidouilliste.com>, Emm=
anuel
 Vadot writes:

>> + * Copyright (C) 2013-2015 Daisuke Aoyama <aoyama@peach.ne.jp>
>
> Was is based on some file ?
> Also someone will probably complain about SDPX tag here :)

Yes, I grabbed the blurp from a nearby file and forgot to edit it,
it's fixed now.

>> +	if (unit !=3D BCM_PWM_CLKSRC) {
>> +		device_printf(sc->sc_dev,
>> +		    "Unsupported unit 0x%x", unit);
>> +		return (0);
>> +	}
>
> Uhg, this is ... ugly ...

Yes, very much so.

> The proper way will be to introduce a real clock manager exposing a
>clock domain and clocks using the extres/clk framework.

Yes, Somebody[tm] should really do that[1], just like Somebody[tm] should
write drivers for all sorts of other stuff on all sorts of platforms.

Eventually Somebody[tm] may even get around to that, but in the
meantime people who play with FreeBSD on Rpi's can at least get
the PWM output to work.

Poul-Henning

[1] Are you tired of Nice & Accurate[tm] chip documentation which
leaves no room for creativity and exploration?

Do you love to extrapolate and second-guess chip-designers mental
process from random snippets of incompetently written code ?

If so, you may find welcome relief trying to write a device driver
for the "BCM283x - Documentation - Scmockumentation!" family of
devices!

-- =

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    =

Never attribute to malice what can adequately be explained by incompetence=
.



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