linux-kernel - Re: [PATCH v2] net: ethernet: stmmac: dwmac-rk: Add GMAC support for PX30

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Date:   Thu, 14 Jun 2018 10:30:56 +0200
From:   Heiko Stübner <heiko@...ech.de>
To:     David Wu <david.wu@...k-chips.com>
Cc:     davem@...emloft.net, robh+dt@...nel.org, mark.rutland@....com,
        huangtao@...k-chips.com, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] net: ethernet: stmmac: dwmac-rk: Add GMAC support for PX30

Am Donnerstag, 14. Juni 2018, 10:14:31 CEST schrieb David Wu:
> Hi Heiko,
> 
> 在 2018年06月14日 15:54, Heiko Stübner 写道:
> > I don't see that new clock documented in the dt-binding.
> > Also, which clock from the clock-controller does this connect to?
> 
> The clock is the "SCLK_GMAC_RMII" at the clock-controller, which could
> be set rate by the link speed.

Hmm, while these huge number of clocks are somewhat strange,
shouldn't it be named something with _rmii instead of _speed then?

Also, I don't see any clk_enable action for that new clock, so you could
end up with being off?

And someone could convert the driver to use the new clk-bulk APIs [0],
so the large number of clk_prepare_enable calls would be a bit
trimmed down.


Heiko

[0] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/clk/clk-bulk.c