diff mbox series

[RFC,v1,1/5] dt-bindings: leds: add led trigger netdev

Message ID 20240505164549.65644-2-linux@fw-web.de
State New
Headers show
Series Add Bananapi R3 Mini | expand

Commit Message

Frank Wunderlich May 5, 2024, 4:45 p.m. UTC 
From: Frank Wunderlich <frank-w@public-files.de>

Add led trigger implemented with config-symbol LEDS_TRIGGER_NETDEV to
binding.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
---
 Documentation/devicetree/bindings/leds/common.yaml | 2 ++
 1 file changed, 2 insertions(+)

Comments

Krzysztof Kozlowski May 6, 2024, 8:18 a.m. UTC | #1 
On 05/05/2024 18:45, Frank Wunderlich wrote:
> From: Frank Wunderlich <frank-w@public-files.de>
> 
> Add led trigger implemented with config-symbol LEDS_TRIGGER_NETDEV to
> binding.
> 
> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
> ---
>  Documentation/devicetree/bindings/leds/common.yaml | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/leds/common.yaml b/Documentation/devicetree/bindings/leds/common.yaml
> index 8a3c2398b10c..bf9a101e4d42 100644
> --- a/Documentation/devicetree/bindings/leds/common.yaml
> +++ b/Documentation/devicetree/bindings/leds/common.yaml
> @@ -113,6 +113,8 @@ properties:
>              # LED indicates NAND memory activity (deprecated),
>              # in new implementations use "mtd"
>            - nand-disk
> +            # LED indicates network activity
> +          - netdev

"dev" is redundant (there is no flash-dev or usb-host-dev). Two network
interfaces are already provided, so your commit msg must provide
rationale why this is not enough and why this is useful/needed.

Best regards,
Krzysztof
Daniel Golle May 6, 2024, 8:59 a.m. UTC | #2 
On Mon, May 06, 2024 at 10:18:09AM +0200, Krzysztof Kozlowski wrote:
> On 05/05/2024 18:45, Frank Wunderlich wrote:
> > From: Frank Wunderlich <frank-w@public-files.de>
> > 
> > Add led trigger implemented with config-symbol LEDS_TRIGGER_NETDEV to
> > binding.
> > 
> > Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
> > ---
> >  Documentation/devicetree/bindings/leds/common.yaml | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/leds/common.yaml b/Documentation/devicetree/bindings/leds/common.yaml
> > index 8a3c2398b10c..bf9a101e4d42 100644
> > --- a/Documentation/devicetree/bindings/leds/common.yaml
> > +++ b/Documentation/devicetree/bindings/leds/common.yaml
> > @@ -113,6 +113,8 @@ properties:
> >              # LED indicates NAND memory activity (deprecated),
> >              # in new implementations use "mtd"
> >            - nand-disk
> > +            # LED indicates network activity
> > +          - netdev
> 
> "dev" is redundant (there is no flash-dev or usb-host-dev). Two network
> interfaces are already provided, so your commit msg must provide
> rationale why this is not enough and why this is useful/needed.

Also note that using 'netdev' assigned via DT via linux,default-trigger
currently doesn't work well. This is because the assignment of the trigger
from DT happens when the PHY is being attached initially, and that's
**before** the network device is registered with Linux.
As a result, LED event offloading is never used if done in this way.

I know that bindings and implementation are two different independent
things, but yet I believe that adding bindings for a feature which doesn't
really work would be misleading.
Frank Wunderlich May 6, 2024, 5:10 p.m. UTC | #3 
Hi

> Gesendet: Montag, 06. Mai 2024 um 10:18 Uhr
> Von: "Krzysztof Kozlowski" <krzysztof.kozlowski@linaro.org>
> An: "Frank Wunderlich" <linux@fw-web.de>, "Rob Herring" <robh@kernel.org>, "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>, "Conor Dooley" <conor+dt@kernel.org>, "Michael Turquette" <mturquette@baylibre.com>, "Stephen Boyd" <sboyd@kernel.org>, "Pavel Machek" <pavel@ucw.cz>, "Lee Jones" <lee@kernel.org>, "David S. Miller" <davem@davemloft.net>, "Eric Dumazet" <edumazet@google.com>, "Jakub Kicinski" <kuba@kernel.org>, "Paolo Abeni" <pabeni@redhat.com>, "Matthias Brugger" <matthias.bgg@gmail.com>, "AngeloGioacchino Del Regno" <angelogioacchino.delregno@collabora.com>
> Cc: "Frank Wunderlich" <frank-w@public-files.de>, "Eric Woudstra" <ericwouds@gmail.com>, "Tianling Shen" <cnsztl@immortalwrt.org>, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, linux-leds@vger.kernel.org, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org
> Betreff: Re: [RFC v1 1/5] dt-bindings: leds: add led trigger netdev
>
> On 05/05/2024 18:45, Frank Wunderlich wrote:
> > From: Frank Wunderlich <frank-w@public-files.de>
> >
> > Add led trigger implemented with config-symbol LEDS_TRIGGER_NETDEV to
> > binding.
> >
> > Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
> > ---
> >  Documentation/devicetree/bindings/leds/common.yaml | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/leds/common.yaml b/Documentation/devicetree/bindings/leds/common.yaml
> > index 8a3c2398b10c..bf9a101e4d42 100644
> > --- a/Documentation/devicetree/bindings/leds/common.yaml
> > +++ b/Documentation/devicetree/bindings/leds/common.yaml
> > @@ -113,6 +113,8 @@ properties:
> >              # LED indicates NAND memory activity (deprecated),
> >              # in new implementations use "mtd"
> >            - nand-disk
> > +            # LED indicates network activity
> > +          - netdev
>
> "dev" is redundant (there is no flash-dev or usb-host-dev). Two network
> interfaces are already provided, so your commit msg must provide
> rationale why this is not enough and why this is useful/needed.

i only see 1 network binding...and this is labeled/described with wlan and phy

        # LED is triggered by WLAN activity
      - pattern: "^phy[0-9]+tx$"

which second do you mean?

btw. usb + disk has 3 trigger and "netdev" is already used in some dts, so i thought adding the binding is a good idea

arch/arm/boot/dts/rockchip/rk3128-xpi-3128.dts:107:			 * linux,default-trigger = "netdev";
arch/arm/boot/dts/nxp/imx/imx53-m53menlo.dts:52:			linux,default-trigger = "netdev";
arch/arm/boot/dts/intel/ixp/intel-ixp42x-dlink-dsm-g600.dts:51:			linux,default-trigger = "netdev";
arch/arm/boot/dts/intel/ixp/intel-ixp42x-iomega-nas100d.dts:39:			linux,default-trigger = "netdev";
arch/arm/boot/dts/ti/omap/am5729-beagleboneai.dts:138:			linux,default-trigger = "netdev";
arch/arm/boot/dts/ti/omap/am335x-netcan-plus-1xx.dts:27:			linux,default-trigger = "netdev";
arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts:107:			linux,default-trigger = "netdev";
arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts:113:			linux,default-trigger = "netdev";

first one has it as comment that not yet in binding and with not that it needs to be set in userspace
like Daniel stated in the dts patch (does not work for phys)...so i drop this patch and the property
in the dts.

> Best regards,
> Krzysztof

regards Frank
Krzysztof Kozlowski May 7, 2024, 6:10 a.m. UTC | #4 
On 06/05/2024 19:10, Frank Wunderlich wrote:
> Hi
> 
>> Gesendet: Montag, 06. Mai 2024 um 10:18 Uhr
>> Von: "Krzysztof Kozlowski" <krzysztof.kozlowski@linaro.org>
>> An: "Frank Wunderlich" <linux@fw-web.de>, "Rob Herring" <robh@kernel.org>, "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>, "Conor Dooley" <conor+dt@kernel.org>, "Michael Turquette" <mturquette@baylibre.com>, "Stephen Boyd" <sboyd@kernel.org>, "Pavel Machek" <pavel@ucw.cz>, "Lee Jones" <lee@kernel.org>, "David S. Miller" <davem@davemloft.net>, "Eric Dumazet" <edumazet@google.com>, "Jakub Kicinski" <kuba@kernel.org>, "Paolo Abeni" <pabeni@redhat.com>, "Matthias Brugger" <matthias.bgg@gmail.com>, "AngeloGioacchino Del Regno" <angelogioacchino.delregno@collabora.com>
>> Cc: "Frank Wunderlich" <frank-w@public-files.de>, "Eric Woudstra" <ericwouds@gmail.com>, "Tianling Shen" <cnsztl@immortalwrt.org>, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, linux-leds@vger.kernel.org, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org
>> Betreff: Re: [RFC v1 1/5] dt-bindings: leds: add led trigger netdev
>>
>> On 05/05/2024 18:45, Frank Wunderlich wrote:
>>> From: Frank Wunderlich <frank-w@public-files.de>
>>>
>>> Add led trigger implemented with config-symbol LEDS_TRIGGER_NETDEV to
>>> binding.
>>>
>>> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
>>> ---
>>>  Documentation/devicetree/bindings/leds/common.yaml | 2 ++
>>>  1 file changed, 2 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/leds/common.yaml b/Documentation/devicetree/bindings/leds/common.yaml
>>> index 8a3c2398b10c..bf9a101e4d42 100644
>>> --- a/Documentation/devicetree/bindings/leds/common.yaml
>>> +++ b/Documentation/devicetree/bindings/leds/common.yaml
>>> @@ -113,6 +113,8 @@ properties:
>>>              # LED indicates NAND memory activity (deprecated),
>>>              # in new implementations use "mtd"
>>>            - nand-disk
>>> +            # LED indicates network activity
>>> +          - netdev
>>
>> "dev" is redundant (there is no flash-dev or usb-host-dev). Two network
>> interfaces are already provided, so your commit msg must provide
>> rationale why this is not enough and why this is useful/needed.
> 
> i only see 1 network binding...and this is labeled/described with wlan and phy
> 
>         # LED is triggered by WLAN activity
>       - pattern: "^phy[0-9]+tx$"
> 
> which second do you mean?
> 
> btw. usb + disk has 3 trigger and "netdev" is already used in some dts, so i thought adding the binding is a good idea
> 
> arch/arm/boot/dts/rockchip/rk3128-xpi-3128.dts:107:			 * linux,default-trigger = "netdev";
> arch/arm/boot/dts/nxp/imx/imx53-m53menlo.dts:52:			linux,default-trigger = "netdev";
> arch/arm/boot/dts/intel/ixp/intel-ixp42x-dlink-dsm-g600.dts:51:			linux,default-trigger = "netdev";
> arch/arm/boot/dts/intel/ixp/intel-ixp42x-iomega-nas100d.dts:39:			linux,default-trigger = "netdev";
> arch/arm/boot/dts/ti/omap/am5729-beagleboneai.dts:138:			linux,default-trigger = "netdev";
> arch/arm/boot/dts/ti/omap/am335x-netcan-plus-1xx.dts:27:			linux,default-trigger = "netdev";
> arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts:107:			linux,default-trigger = "netdev";
> arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts:113:			linux,default-trigger = "netdev";
> 

Then please check previous discussions:
https://lore.kernel.org/all/20230217230346.GA2217008-robh@kernel.org/

Best regards,
Krzysztof
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/leds/common.yaml b/Documentation/devicetree/bindings/leds/common.yaml
index 8a3c2398b10c..bf9a101e4d42 100644
--- a/Documentation/devicetree/bindings/leds/common.yaml
+++ b/Documentation/devicetree/bindings/leds/common.yaml
@@ -113,6 +113,8 @@  properties:
             # LED indicates NAND memory activity (deprecated),
             # in new implementations use "mtd"
           - nand-disk
+            # LED indicates network activity
+          - netdev
             # No trigger assigned to the LED. This is the default mode
             # if trigger is absent
           - none