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From: Michael Walle <michael@walle.cc>
To: Pavel Machek <pavel@ucw.cz>
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>,
	Lee Jones <lee.jones@linaro.org>,
	Thierry Reding <thierry.reding@gmail.com>,
	Uwe Kleine-K??nig <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>
Subject: Re: [PATCH v5 12/13] arm64: dts: freescale: sl28: enable LED support
Date: Fri, 17 Jul 2020 23:54:42 +0200
Message-ID: <af0584da0f43cb6cfffeb8fcf2235acb@walle.cc> (raw)
In-Reply-To: <20200717083610.GC1027@bug>

Hi Pavel,

Am 2020-07-17 10:36, schrieb Pavel Machek:
> Hi!
> 
>> Now that we have support for GPIO lines of the SMARC connector, enable
>> LED support on the KBox A-230-LS. There are two LEDs without fixed
>> functions, one is yellow and one is green. Unfortunately, it is just 
>> one
>> multi-color LED, thus while it is possible to enable both at the same
>> time it is hard to tell the difference between "yellow only" and 
>> "yellow
>> and green".
> 
>> +		user_yellow {
>> +			label = "s1914:yellow:user";
>> +			gpios = <&sl28cpld_gpio0 0 0>;
>> +		};
>> +
>> +		user_green {
>> +			label = "s1914:green:user";
>> +			gpios = <&sl28cpld_gpio1 3 0>;
>> +		};
> 
> This is not suitable label for such LEDs... there's zero chance 
> userland will
> know what to do with these.
> 
> Do they have some kind of "usual" function?

Unfortunately, they do not. I guess the green one could be something 
like
"application ready" and the yellow one could be an indication that some
fault occurred.

Do you have any suggestions?

-michael

  reply index

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-06 17:53 [PATCH v5 00/13] Add support for Kontron sl28cpld Michael Walle
2020-07-06 17:53 ` [PATCH v5 01/13] regmap-irq: use fwnode instead of device node in add_irq_chip() Michael Walle
2020-07-08 10:22   ` Mark Brown
2020-07-06 17:53 ` [PATCH v5 02/13] mfd: add simple regmap based I2C driver Michael Walle
2020-07-17  9:04   ` Lee Jones
2020-07-19 22:25     ` Michael Walle
2020-07-17  9:06   ` Lee Jones
2020-07-19 22:31     ` Michael Walle
2020-07-20  7:43       ` Lee Jones
2020-07-06 17:53 ` [PATCH v5 03/13] dt-bindings: mfd: Add bindings for sl28cpld Michael Walle
2020-07-13 16:04   ` Rob Herring
2020-07-06 17:53 ` [PATCH v5 04/13] mfd: simple-mfd-i2c: add sl28cpld support Michael Walle
2020-07-06 17:53 ` [PATCH v5 05/13] irqchip: add sl28cpld interrupt controller support Michael Walle
2020-07-08  9:37   ` Marc Zyngier
2020-07-06 17:53 ` [PATCH v5 06/13] watchdog: add support for sl28cpld watchdog Michael Walle
2020-07-06 17:53 ` [PATCH v5 07/13] pwm: add support for sl28cpld PWM controller Michael Walle
2020-07-09  8:50   ` Uwe Kleine-König
2020-07-11 17:28     ` Michael Walle
2020-07-13  8:47       ` Uwe Kleine-König
2020-07-14 11:31         ` Michael Walle
2020-07-14 16:08           ` Uwe Kleine-König
2020-07-14 21:09             ` Michael Walle
2020-07-15 16:36               ` Uwe Kleine-König
2020-07-15 17:45                 ` Michael Walle
2020-07-15 18:18                   ` Uwe Kleine-König
2020-07-15 20:41                     ` Michael Walle
2020-07-16  6:10                       ` Uwe Kleine-König
2020-07-06 17:53 ` [PATCH v5 08/13] gpio: add support for the sl28cpld GPIO controller Michael Walle
2020-07-08  7:35   ` Linus Walleij
2020-07-06 17:53 ` [PATCH v5 09/13] hwmon: add support for the sl28cpld hardware monitoring controller Michael Walle
2020-07-06 17:53 ` [PATCH v5 10/13] arm64: dts: freescale: sl28: enable sl28cpld Michael Walle
2020-07-06 17:53 ` [PATCH v5 11/13] arm64: dts: freescale: sl28: map GPIOs to input events Michael Walle
2020-07-06 17:53 ` [PATCH v5 12/13] arm64: dts: freescale: sl28: enable LED support Michael Walle
2020-07-17  8:36   ` Pavel Machek
2020-07-17 21:54     ` Michael Walle [this message]
2020-07-06 17:53 ` [PATCH v5 13/13] arm64: dts: freescale: sl28: enable fan support Michael Walle
2020-07-08  7:39   ` Linus Walleij
2020-07-08  7:56     ` Michael Walle

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