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From: Amit Tomer <amittomer25@gmail.com>
To: Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
Cc: "Florian Fainelli" <f.fainelli@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	"Andrew Lunn" <andrew@lunn.ch>,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Andreas Färber" <afaerber@suse.de>,
	"Manivannan Sadhasivam" <mani@kernel.org>,
	"Philipp Zabel" <p.zabel@pengutronix.de>,
	netdev@vger.kernel.org, devicetree@vger.kernel.org,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	linux-actions@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 2/3] net: ethernet: actions: Add Actions Semi Owl Ethernet MAC driver
Date: Mon, 28 Jun 2021 13:55:40 +0530	[thread overview]
Message-ID: <CABHD4K_r_ixtBXH_v82S62onYr-=fbh8cHJsdz0oo6MN-i5tVg@mail.gmail.com> (raw)
In-Reply-To: <20210322084420.GA1503756@BV030612LT>

Hi,

> > Do you know the story behind this Ethernet controller?
>
> I just happened to get a board based on the S500 SoC, so I took this
> opportunity to help improving the mainline kernel support, but other
> than that I do not really know much about the hardware history.
>
> > The various
> > receive/transmit descriptor definitions are 99% those defined in
> > drivers/net/ethernet/stmmicro/stmmac/descs.h for the normal descriptor.
>
> That's an interesting observation. I could only assume the vendor did
> not want to reinvent the wheel here, but I cannot say if this is a
> common design scheme or is something specific to STMicroelectronics
> only.

I am not entirely sure about it but it looks like it *may* only need
to have a glue driver to
connect to DWMAC.
For instance, on the U-boot[1] side (S700 is one of 64bit OWL SoC from
actions), we kind of re-uses already
existing DWMAC and provide a glue code, and on the Linux side as well
have some similar implementation (locally).

Thanks
-Amit.

[1]: https://source.denx.de/u-boot/u-boot/-/blob/master/drivers/net/dwmac_s700.c

  reply	other threads:[~2021-06-28  8:26 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-21 23:29 [PATCH v3 0/3] Add support for Actions Semi Owl Ethernet MAC Cristian Ciocaltea
2021-03-21 23:29 ` [PATCH v3 1/3] dt-bindings: net: Add Actions Semi Owl Ethernet MAC binding Cristian Ciocaltea
2021-03-21 23:29 ` [PATCH v3 2/3] net: ethernet: actions: Add Actions Semi Owl Ethernet MAC driver Cristian Ciocaltea
2021-03-22  3:30   ` Florian Fainelli
2021-03-22  8:44     ` Cristian Ciocaltea
2021-06-28  8:25       ` Amit Tomer [this message]
2021-06-28  9:57         ` Cristian Ciocaltea
2021-03-22 23:38   ` Andrew Lunn
2021-03-23  8:34     ` Cristian Ciocaltea
2021-03-21 23:29 ` [PATCH v3 3/3] MAINTAINERS: Add entries for Actions Semi Owl Ethernet MAC Cristian Ciocaltea
2021-03-22 20:00 ` [PATCH v3 0/3] Add support " patchwork-bot+netdevbpf

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