From: Andrew Lunn <andrew@lunn.ch>
To: Selvamani Rajagopal <Selvamani.Rajagopal@onsemi.com>
Cc: Rob Herring <robh@kernel.org>,
Piergiorgio Beruto <Pier.Beruto@onsemi.com>,
"andrew+netdev@lunn.ch" <andrew+netdev@lunn.ch>,
"davem@davemloft.net" <davem@davemloft.net>,
"edumazet@google.com" <edumazet@google.com>,
"kuba@kernel.org" <kuba@kernel.org>,
"pabeni@redhat.com" <pabeni@redhat.com>,
"krzk+dt@kernel.org" <krzk+dt@kernel.org>,
"conor+dt@kernel.org" <conor+dt@kernel.org>,
"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 1/5] dt-bindings: net: add onsemi's TS2500/NCN26010 10BASE-T1S MACPHY
Date: Tue, 5 May 2026 19:27:50 +0200 [thread overview]
Message-ID: <7fad56ee-88c8-4e0a-8411-eeb5c0ab4a38@lunn.ch> (raw)
In-Reply-To: <CY8PR02MB924915930E62AE03DF05C2DC833E2@CY8PR02MB9249.namprd02.prod.outlook.com>
> Had the same question in internal review. Datasheet says the minimum
> speed 15 MHz is needed. That's why we had placed.
Could you try it at lower speeds. What happens?
Since it is a 10Mbps media, if the SPI speed is lower than 15MHz,
maybe it cannot keep up with the media? But this clock speed on its
own is not the deciding factor, there could be other users of the SPI
bus. I would expect the driver and device to keep working if the SPI
bus is saturated, just not give the full 10Mbps. And it would also be
a good test the device and driver do work correctly when the bus is
saturated.
Andrew
next prev parent reply other threads:[~2026-05-05 17:28 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-01 19:15 [PATCH net-next 1/5] dt-bindings: net: add onsemi's TS2500/NCN26010 10BASE-T1S MACPHY Selvamani Rajagopal
2026-05-01 20:36 ` Rob Herring (Arm)
2026-05-01 21:21 ` Selvamani Rajagopal
2026-05-05 13:44 ` Rob Herring
2026-05-05 15:11 ` Selvamani Rajagopal
2026-05-05 17:27 ` Andrew Lunn [this message]
2026-05-05 17:33 ` Selvamani Rajagopal
2026-05-05 19:01 ` Andrew Lunn
2026-05-05 19:05 ` Selvamani Rajagopal
[not found] ` <DM8PR02MB8021DB41F30E52D3DED9E7329D3E2@DM8PR02MB8021.namprd02.prod.outlook.com>
2026-05-05 21:25 ` Andrew Lunn
2026-05-06 19:20 ` Selvamani Rajagopal
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