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From: Michael Walle <michael@walle.cc>
To: Lee Jones <lee.jones@linaro.org>
Cc: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org,
	linux-pwm@vger.kernel.org, linux-watchdog@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	"Linus Walleij" <linus.walleij@linaro.org>,
	"Bartosz Golaszewski" <bgolaszewski@baylibre.com>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Jean Delvare" <jdelvare@suse.com>,
	"Guenter Roeck" <linux@roeck-us.net>,
	"Thierry Reding" <thierry.reding@gmail.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Wim Van Sebroeck" <wim@linux-watchdog.org>,
	"Shawn Guo" <shawnguo@kernel.org>, "Li Yang" <leoyang.li@nxp.com>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Jason Cooper" <jason@lakedaemon.net>,
	"Marc Zyngier" <maz@kernel.org>,
	"Mark Brown" <broonie@kernel.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Andy Shevchenko" <andriy.shevchenko@linux.intel.com>,
	"Catalin Marinas" <catalin.marinas@arm.com>,
	"Will Deacon" <will@kernel.org>, "Pavel Machek" <pavel@ucw.cz>,
	"Rob Herring" <robh@kernel.org>
Subject: Re: [PATCH v6 02/13] dt-bindings: mfd: Add bindings for sl28cpld
Date: Tue, 28 Jul 2020 11:06:02 +0200
Message-ID: <2fd3b880e36aa65e880b801092b51945@walle.cc> (raw)
In-Reply-To: <20200728085616.GD2419169@dell>

Am 2020-07-28 10:56, schrieb Lee Jones:
>> > > > > +$id: http://devicetree.org/schemas/mfd/kontron,sl28cpld.yaml#
>> > > > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> > > > > +
>> > > > > +title: Kontron's sl28cpld board management controller
>> > > >
>> > > > "S128CPLD" ?
>> > >
>> > > still not, its sl28cpld, think of a project/code name, not the product
>> > > appended with CPLD.
>> > >
>> > > > "Board Management Controller (BMC)" ?
>> > >
>> > > sounds like IPMI, which I wanted to avoid.
>> >
>> > Is there a datasheet?
>> 
>> No there isn't.
> 
> Then what are you working from?

Ok, there is no public datasheet. If that wasn't clear before, I'm 
working
for that company that also implemented that CPLD.

>> > > > > +maintainers:
>> > > > > +  - Michael Walle <michael@walle.cc>
>> > > > > +
>> > > > > +description: |
>> > > > > +  The board management controller may contain different IP blocks
>> > > > > like
>> > > > > +  watchdog, fan monitoring, PWM controller, interrupt controller
>> > > > > and a
>> > > > > +  GPIO controller.
>> > > > > +
>> > > > > +properties:
>> > > > > +  compatible:
>> > > > > +    const: kontron,sl28cpld-r1
>> > > >
>> > > > We don't usually code revision numbers in compatible strings.
>> > > >
>> > > > Is there any way to pull this from the H/W?
>> > >
>> > > No, unfortunately you can't. And I really want to keep that, in case
>> > > in the future there are some backwards incompatible changes.
>> >
>> > Rob,
>> >
>> > I know you reviewed this already, but you can give your opinion on
>> > this specifically please?  I know that we have pushed back on this in
>> > the past.
>> 
>> Oh, come one. That is an arbitrary string. "sl28cpld-r1" is the first
>> implementation of this. A future "sl28cpld-r2" might look completely
>> different and might not suite the simple MFD at all. "sl28cpld" is
>> a made up name - as "sl28cpld-r1" is, too.
> 
> Well that sounds bogus for a start.  I guess that's one of the
> problems with trying to support programmable H/W in S/W.

What sounds bogus? That we name the implementation sl28cpld? How
is that different to like adt7411? Its just a name made up by the
vendor. So if there is a new version of the adt7411 the vendor
might name it adt7412. We name it sl28cpld-r2. So what is the
problem here?

-michael

  reply index

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-25 23:18 [PATCH v6 00/13] Add support for Kontron sl28cpld Michael Walle
2020-07-25 23:18 ` [PATCH v6 01/13] mfd: add simple regmap based I2C driver Michael Walle
2020-07-28  7:19   ` Lee Jones
2020-07-28  7:42     ` Michael Walle
2020-07-28  8:15       ` Lee Jones
2020-07-28  8:27         ` Michael Walle
2020-07-28  8:35           ` Lee Jones
2020-07-25 23:18 ` [PATCH v6 02/13] dt-bindings: mfd: Add bindings for sl28cpld Michael Walle
2020-07-28  7:24   ` Lee Jones
2020-07-28  7:57     ` Michael Walle
2020-07-28  8:27       ` Lee Jones
2020-07-28  8:38         ` Michael Walle
2020-07-28  8:56           ` Lee Jones
2020-07-28  9:06             ` Michael Walle [this message]
2020-07-28  9:20               ` Lee Jones
2020-07-28  9:39                 ` Michael Walle
2020-07-25 23:18 ` [PATCH v6 03/13] mfd: simple-mfd-i2c: add sl28cpld support Michael Walle
2020-07-28  7:25   ` Lee Jones
2020-07-25 23:18 ` [PATCH v6 04/13] irqchip: add sl28cpld interrupt controller support Michael Walle
2020-07-25 23:18 ` [PATCH v6 05/13] watchdog: add support for sl28cpld watchdog Michael Walle
2020-07-25 23:18 ` [PATCH v6 06/13] pwm: add support for sl28cpld PWM controller Michael Walle
2020-07-27  7:30   ` Thierry Reding
2020-07-28  7:43   ` Uwe Kleine-König
2020-07-28  8:21     ` Michael Walle
2020-07-28  9:47       ` Uwe Kleine-König
2020-07-28 10:51         ` Lee Jones
2020-07-25 23:18 ` [PATCH v6 07/13] gpio: add support for the sl28cpld GPIO controller Michael Walle
2020-07-26  9:16   ` Andy Shevchenko
2020-07-25 23:18 ` [PATCH v6 08/13] hwmon: add support for the sl28cpld hardware monitoring controller Michael Walle
2020-07-26  9:18   ` Andy Shevchenko
2020-07-25 23:18 ` [PATCH v6 09/13] arm64: dts: freescale: sl28: enable sl28cpld Michael Walle
2020-07-25 23:18 ` [PATCH v6 10/13] arm64: dts: freescale: sl28: map GPIOs to input events Michael Walle
2020-07-25 23:18 ` [PATCH v6 11/13] arm64: dts: freescale: sl28: enable LED support Michael Walle
2020-07-25 23:18 ` [PATCH v6 12/13] arm64: dts: freescale: sl28: enable fan support Michael Walle
2020-07-25 23:18 ` [PATCH v6 13/13] arm64: defconfig: enable the sl28cpld board management controller Michael Walle

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