From: Josua Mayer <josua@solid-run.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Michael Hennerich <michael.hennerich@analog.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>,
Alexandru Tachici <alexandru.tachici@analog.com>,
Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>,
Jon Nettleton <jon@solid-run.com>,
Yazan Shhady <yazan.shhady@solid-run.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH net-next v2 1/2] dt-bindings: net: adin: add property for link-status pin polarity
Date: Sat, 20 Apr 2024 16:56:19 +0000 [thread overview]
Message-ID: <b3c4301b-afae-44fb-86c5-94f23d363c0a@solid-run.com> (raw)
In-Reply-To: <41567aec-adf2-422a-867e-9087ef33ef36@lunn.ch>
Am 20.04.24 um 18:10 schrieb Andrew Lunn:
>> + adi,link-st-polarity:
>> + $ref: /schemas/types.yaml#/definitions/uint32
>> + description:
>> + LINK_ST pin polarity.
>> + enum:
>> + - 0 # active high
>> + - 1 # active low
>> + default: 0
>> +
> How does this differ from:
>
> Documentation/devicetree/bindings/leds/common.yaml
>
> + active-low:
> + type: boolean
> + description:
> + Makes LED active low. To turn the LED ON, line needs to be
> + set to low voltage instead of high.
>
>
> Why do we need a vendor property when there is a generic property?
It differs in tree depth and naming.
To use led binding we need to add a leds node with a led node inside,
and decide on an index for this not-an-led pin.
Sure, could be done but maybe should be documented somewhere
as it is not intuitive.
Main reason for having a vendor-specific and non-led property
is that this pin is not a led, it is merely a signal.
The PHY can be configured to provide via this signal either:
- link-status
- collision detection
- carrier sense
- tx packet start
- rx packet start
The purpose of the binding I propose is just polarity of this signal.
A more complete binding would also allow selection from the
above listed functions.
This kind of configuration is much more like pinctrl than led.
next prev parent reply other threads:[~2024-04-20 16:56 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-20 11:22 [PATCH net-next v2 0/2] net: phy: adin: add support for setting led-, link-status-pin polarity Josua Mayer
2024-04-20 11:23 ` [PATCH net-next v2 1/2] dt-bindings: net: adin: add property for link-status pin polarity Josua Mayer
2024-04-20 16:10 ` Andrew Lunn
2024-04-20 16:56 ` Josua Mayer [this message]
2024-04-20 17:09 ` Andrew Lunn
2024-04-21 9:07 ` Josua Mayer
2024-04-21 17:54 ` Andrew Lunn
2024-04-29 9:54 ` Josua Mayer
2024-04-20 11:23 ` [PATCH net-next v2 2/2] net: phy: adin: add support for setting link-status-pin polarity Josua Mayer
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