linux-kernel - Re: [linux-sunxi] [PATCH v6 11/13] ARM: dts: sun8i: add DE2 nodes for V3s SoC

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Message-ID: <20170509192611.vouyitju6x3yibzz@lukather>
Date:   Tue, 9 May 2017 21:26:11 +0200
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Icenowy Zheng <icenowy@...c.io>
Cc:     linux-arm-kernel@...ts.infradead.org,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel-owner@...r.kernel.org,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        linux-clk <linux-clk@...r.kernel.org>
Subject: Re: [linux-sunxi] [PATCH v6 11/13] ARM: dts: sun8i: add DE2 nodes
 for V3s SoC

1;4601;0c
On Fri, May 05, 2017 at 08:34:16PM +0800, Icenowy Zheng wrote:
> 
> 
> 于 2017年5月5日 GMT+08:00 下午8:30:35, Maxime Ripard <maxime.ripard@...e-electrons.com> 写到:
> >On Fri, May 05, 2017 at 04:53:43PM +0800, icenowy@...c.io wrote:
> >> > > +               de2_clocks: clock@...0000 {
> >> > > +                       compatible =
> >"allwinner,sun50i-h5-de2-clk";
> >> > 
> >> > I am a bit skeptical about this. Since the V3S only has one mixer,
> >do
> >> > the clocks
> >> > for the second one even exist?
> >> 
> >> It's described in the de_clock.c in the BSP source code, and in
> >hardware
> >> these bits can be really set (although without clock output).
> >> 
> >> So I use this compatible which has still the extra clocks.
> >
> >If it's not usable, then it shouldn't be in the code, it's basically
> >dead code.
> 
> Thus should we have one more DE2 CCU compatible without mixer1
> clocks for V3s?

If those clocks don't exist on v3s, then yes.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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