From: Florian Fainelli <f.fainelli@gmail.com>
To: Robert Marko <robert.marko@sartura.hr>, Andrew Lunn <andrew@lunn.ch>
Cc: Heiner Kallweit <hkallweit1@gmail.com>,
Russell King - ARM Linux admin <linux@armlinux.org.uk>,
David Miller <davem@davemloft.net>,
kuba@kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-msm <linux-arm-msm@vger.kernel.org>,
Andy Gross <agross@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
robh+dt@kernel.org
Subject: Re: [net-next,PATCH 4/4] dt-bindings: mdio-ipq4019: add clock support
Date: Thu, 2 Jul 2020 13:04:37 -0700 [thread overview]
Message-ID: <42ebc500-35ba-48f6-c4d1-3743abde1852@gmail.com> (raw)
In-Reply-To: <CA+HBbNGcV0H4L4gzWOUs8GDkiMEOaGdeVhAbtfcT5-PGmVJjfA@mail.gmail.com>
On 7/2/2020 12:18 PM, Robert Marko wrote:
> On Thu, Jul 2, 2020 at 3:38 PM Andrew Lunn <andrew@lunn.ch> wrote:
>>
>>> + clock-frequency:
>>> + default: 100000000
>>
>> IEEE 802.3 says the default should be 2.5MHz. Some PHYs will go
>> faster, but 100MHz seems unlikely!
> This MDIO controller has an internal divider, by default its set for
> 100MHz clock.
> In IPQ4019 MDIO clock is not controllable but in IPQ6018 etc it's controllable.
> That is the only combination I have currently seen used by Qualcomm.
Not sure I understand here, the 'clock-frequency' is supposed to denote
the MDIO bus output clock frequency, that is the frequency at which all
MDIO devices are going to operate at. Is this 100MHz a clock that feeds
into the MDIO block and get internally divided by a programmable
register to obtain an output MDIO clock?
--
Florian
next prev parent reply other threads:[~2020-07-02 20:04 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-02 10:29 [net-next,PATCH 0/4] net: mdio-ipq4019: add Clause 45 and clock support Robert Marko
2020-07-02 10:29 ` [net-next,PATCH 1/4] net: mdio-ipq4019: change defines to upper case Robert Marko
2020-07-02 13:25 ` Andrew Lunn
2020-07-02 19:58 ` Florian Fainelli
2020-07-02 10:29 ` [net-next,PATCH 2/4] net: mdio-ipq4019: add clock support Robert Marko
2020-07-02 13:29 ` Andrew Lunn
2020-07-02 19:59 ` Florian Fainelli
2020-07-03 11:37 ` Robert Marko
2020-07-03 13:35 ` Andrew Lunn
2020-07-02 10:30 ` [net-next,PATCH 3/4] net: mdio-ipq4019: add Clause 45 support Robert Marko
2020-07-02 13:35 ` Andrew Lunn
2020-07-02 10:30 ` [net-next,PATCH 4/4] dt-bindings: mdio-ipq4019: add clock support Robert Marko
2020-07-02 13:38 ` Andrew Lunn
2020-07-02 19:18 ` Robert Marko
2020-07-02 20:04 ` Florian Fainelli [this message]
2020-07-03 7:44 ` Robert Marko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=42ebc500-35ba-48f6-c4d1-3743abde1852@gmail.com \
--to=f.fainelli@gmail.com \
--cc=agross@kernel.org \
--cc=andrew@lunn.ch \
--cc=bjorn.andersson@linaro.org \
--cc=davem@davemloft.net \
--cc=hkallweit1@gmail.com \
--cc=kuba@kernel.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=netdev@vger.kernel.org \
--cc=robert.marko@sartura.hr \
--cc=robh+dt@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox