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Groups > linux.kernel > #1400977
| From | Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH RFT 1/2] phylib: add device reset GPIO support |
| Date | 2016-05-13 23:00 +0200 |
| Message-ID | <ryslH-2vK-9@gated-at.bofh.it> (permalink) |
| References | (1 earlier) <rt2rV-3gl-23@gated-at.bofh.it> <ry3Qm-2Xu-7@gated-at.bofh.it> <ryhgC-qB-3@gated-at.bofh.it> <ryr6h-1tO-11@gated-at.bofh.it> <rysc3-2oB-11@gated-at.bofh.it> |
| Organization | Cogent Embedded |
On 05/13/2016 11:44 PM, Andrew Lunn wrote:
>>> Another issue is that on some boards we have one reset line tied to
>>> multiple PHYs.How do we prevent multiple resets being taking place when each of
>>> the PHYs are registered?
>>
>> My patch just doesn't address this case -- it's about the
>> individual resets only.
>
> This actually needs to be addresses a layer above. What you have is a
> bus reset, not a device reset.
No.
There's simply no such thing as a bus reset for the xMII/MDIO busses,
there's simply no reset signaling on them. Every device has its own reset
signal and its own timing requirements.
> So the gpio line is associated to the mdio bus, not a PHY.
No.
> Either your MDIO driver needs to handle the gpio
> line, or in __mdio_register(),
__mdiobus_register(), you mean?
> before it starts looking at the
> children.
It's basically the same thing.
The MDIO bus reset is a misconception.
>
> Andrew
MBR, Sergei
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Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Uwe Kleine-König <u.kleine-koenig@pengutronix.de> - 2016-05-12 20:50 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-05-12 23:40 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Andrew Lunn <andrew@lunn.ch> - 2016-05-13 06:10 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-05-13 23:20 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Uwe Kleine-König <u.kleine-koenig@pengutronix.de> - 2016-05-13 09:10 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-05-13 23:50 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-05-13 21:20 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-05-16 04:10 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Roger Quadros <rogerq@ti.com> - 2016-05-13 11:10 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-05-13 21:40 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Andrew Lunn <andrew@lunn.ch> - 2016-05-13 22:50 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-05-13 23:00 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Andrew Lunn <andrew@lunn.ch> - 2016-05-14 01:50 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-05-14 21:40 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Andrew Lunn <andrew@lunn.ch> - 2016-05-14 22:00 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Andrew Lunn <andrew@lunn.ch> - 2016-05-16 04:10 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-05-19 15:50 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-05-16 04:10 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Roger Quadros <rogerq@ti.com> - 2016-05-16 11:00 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Linus Walleij <linus.walleij@linaro.org> - 2016-05-26 11:10 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Uwe Kleine-König <u.kleine-koenig@pengutronix.de> - 2016-05-26 21:10 +0200
Re: [PATCH RFT 1/2] phylib: add device reset GPIO support Linus Walleij <linus.walleij@linaro.org> - 2016-05-30 17:00 +0200
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