From: Johan Jonker <jbx6244@gmail.com>
To: Chen-Yu Tsai <wens@kernel.org>
Cc: devicetree <devicetree@vger.kernel.org>,
dmurphy@ti.com, "Heiko Stübner" <heiko@sntech.de>,
jacek.anaszewski@gmail.com,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-leds@vger.kernel.org,
"open list:ARM/Rockchip SoC..."
<linux-rockchip@lists.infradead.org>,
"Pavel Machek" <pavel@ucw.cz>, "Rob Herring" <robh+dt@kernel.org>
Subject: Re: [PATCH v2 2/3] arm64: dts: rockchip: rk3399-roc-pc: Fix MMC numbering for LED triggers
Date: Mon, 27 Apr 2020 12:08:59 +0200 [thread overview]
Message-ID: <65d15254-08da-895c-1a0c-ef6ce231b620@gmail.com> (raw)
In-Reply-To: <CAGb2v66Piu5_2bdqvWV3eEn2Se_y1MNKWvvYBv_J7DA-8jBhbQ@mail.gmail.com>
On 4/27/20 11:17 AM, Chen-Yu Tsai wrote:
> On Mon, Apr 27, 2020 at 4:57 PM Johan Jonker <jbx6244@gmail.com> wrote:
>>
>> Hi Chen-Yu,
>>
>>> From: Chen-Yu Tsai <wens@csie.org>
>>>
>>> With SDIO now enabled, the numbering of the existing MMC host controllers
>>> gets incremented by 1, as the SDIO host is the first one.
>>>
>>> Increment the numbering of the MMC LED triggers to match.
>>>
>>> Fixes: cf3c5397835f ("arm64: dts: rockchip: Enable sdio0 and uart0 on rk3399-roc-pc-mezzanine")
>>> Signed-off-by: Chen-Yu Tsai <wens@csie.org>
>>> ---
>>> arch/arm64/boot/dts/rockchip/rk3399-roc-pc-mezzanine.dts | 8 ++++++++
>>> arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi | 4 ++--
>>> 2 files changed, 10 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc-mezzanine.dts b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc-mezzanine.dts
>>> index 2acb3d500fb9..f0686fc276be 100644
>>> --- a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc-mezzanine.dts
>>> +++ b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc-mezzanine.dts
>>> @@ -38,6 +38,10 @@ vcc3v3_pcie: vcc3v3-pcie {
>>> };
>>> };
>>>
>>> +&diy_led {
>>> + linux,default-trigger = "mmc2";
If you decide to use a free form trigger that is not a 'standard' one,
then it becomes a user property.
User defined properties should not go in a generic dts.
It's up to the user what function he/she gives to that led!
>>> +};
>>> +
>>> &pcie_phy {
>>> status = "okay";
>>> };
>>> @@ -91,3 +95,7 @@ &uart0 {
>>> pinctrl-0 = <&uart0_xfer &uart0_cts &uart0_rts>;
>>> status = "okay";
>>> };
>>> +
>>> +&yellow_led {
>>> + linux,default-trigger = "mmc1";
>>> +};
>>> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
>>> index 9f225e9c3d54..bc060ac7972d 100644
>>> --- a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
>>> +++ b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
>>> @@ -70,14 +70,14 @@ work-led {
>>> linux,default-trigger = "heartbeat";
>>> };
>>>
>>
>>> - diy-led {
>>> + diy_led: diy-led {
>>
>> This changes an existing nodename into something that is still not the
Correction:
It takes an existing nodename and adds a label.
>> preferred way. In the current Rockchip dts there are nodenames like
>> 'work', 'yellow' that causing warnings with the command:
>
> This doesn't change the node name at all. It only adds a label.
> If it doesn't pass the check now, it didn't pass the check before.
>
> I just realized that the footnote I added before is gone because I
> regenerated the patches. The original footnote was something along
> the lines of:
>
> I opted to not change the node names nor the labels as the discussion
> had not concluded. The other reason being that people may have scripts
> or device tree overlays depending on the existing node names.
>
> Previously I asked the following but got no response:
>
> Is changing this after it has been in some kernel releases OK? Wouldn't
> it be considered a break of sysfs ABI?
>
> Also, is there some guideline on how to name the labels? For sunxi we've
> been doing "${vendor}:${color}:${function}" since forever.
>
> As far as I can tell, the hardware vendor [1] has no specific uses for
> these two (red and yellow) LEDs designed in. And their GPIO lines are
> simply labeled "DIY" (for the red one) and "YELLOW". So I'm not sure
> if putting "our" interpretations and the default-trigger into the
> label is wise.
>
> For reference, the green one has its GPIO line labeled "WORK", and their
> intention from [1] is to have it as some sort of power / activity indicator.
> Hence it is named / labeled "work".
>
> As for the node names, I think we can keep it as is for now. It's not
> the preferred form, but there's really no need to change it either.
> And some overlay or script might actually expect that name.
>
>> make -k ARCH=arm dtbs_check
>>
>> Could you give a generic guide line/example, so all these changes are
>> treated the same way? As if the naming follows the preferred 'led-0' line.
>
> I'm not sure what you are asking for.
Your nodename just happend to contain 'led' to pass the regex.
There are many other names in use.
'If' the DT maintainer (=Heiko) decides the get rid of all the warnings
for led nodes then that change would require all nodename to be handled
to same (=preferred way):
Change this:
diy_led: diy-led
yellow_led: yellow-led
Into something like:
led_0: led-0
led_1: led-1
>
> ChenYu
>
>>> label = "red:diy";
>>> gpios = <&gpio0 RK_PB5 GPIO_ACTIVE_HIGH>;
>>> default-state = "off";
>>> linux,default-trigger = "mmc1";
>>> };
>>>
>>> - yellow-led {
>>> + yellow_led: yellow-led {
>>> label = "yellow:yellow-led";
>>> gpios = <&gpio0 RK_PA2 GPIO_ACTIVE_HIGH>;
>>> default-state = "off";
>>> --
>>> 2.26.0
>>
next prev parent reply other threads:[~2020-04-27 10:09 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-27 7:31 [PATCH v2 0/3] arm64: dts: rockchip: misc. cleanups and improvements Chen-Yu Tsai
2020-04-27 7:31 ` [PATCH v2 1/3] dt-bindings: leds: common: Drop enumeration for linux,default-triggers Chen-Yu Tsai
2020-04-27 8:33 ` Johan Jonker
2020-04-27 9:21 ` Chen-Yu Tsai
2020-05-11 23:12 ` Rob Herring
2020-04-27 7:31 ` [PATCH v2 2/3] arm64: dts: rockchip: rk3399-roc-pc: Fix MMC numbering for LED triggers Chen-Yu Tsai
2020-04-27 8:57 ` Johan Jonker
2020-04-27 9:17 ` Chen-Yu Tsai
2020-04-27 10:08 ` Johan Jonker [this message]
2020-04-27 10:33 ` Chen-Yu Tsai
2020-04-27 10:55 ` Johan Jonker
2020-04-27 14:12 ` Johan Jonker
2020-04-27 14:45 ` Chen-Yu Tsai
2020-04-27 15:13 ` Robin Murphy
2020-04-27 7:31 ` [PATCH v2 3/3] arm64: dts: rockchip: rk3328-roc-cc: Set dr_mode to "host" for OTG Chen-Yu Tsai
2020-05-05 6:24 ` [PATCH v2 0/3] arm64: dts: rockchip: misc. cleanups and improvements Chen-Yu Tsai
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