linux-kernel - Re: [PATCH 00/13] arm64: Allwinner A64 support based on sunxi-ng

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Date:	Thu, 28 Jul 2016 22:07:05 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Jean-Francois Moine <moinejf@...e.fr>
Cc:	Rob Herring <robh+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
	Mike Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	devicetree@...r.kernel.org,
	Andre Przywara <andre.przywara@....com>,
	linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 00/13] arm64: Allwinner A64 support based on sunxi-ng

On Wed, Jul 27, 2016 at 10:46:23AM +0200, Jean-Francois Moine wrote:
> On Tue, 26 Jul 2016 22:30:28 +0200
> Maxime Ripard <maxime.ripard@...e-electrons.com> wrote:
> 
> > ere is the previous A64 patches made by Andre [1], reworked to use
> > the new sunxi-ng clock framework.
> > 
> > This uses the current H3 clock code, as both are really similar. The
> > first patches are just meant to rework slightly the H3 code, before
> > introducing the A64-related patches.
> > 
> > Some WiP stuff have been removed, such as the MMC part, but this serie
> > already has a decent amount of devices supported: uart, i2c, rsb, etc.
> > 
> > Let me know what you think,
> 
> I don't see the interest to have common code for 32bits and 64bits.
> The clock driver of a SoC will never evolve, so, it is simpler to
> copy the source common with the H3 into a clean A64 clock driver.

I'm not sure why 32 bits vs 64 bits matters here. We're going to share
a significant number of drivers already between armv7 and armv8, like
MMC, EMAC, I2C, and so on.

And I expect to share the data in other SoCs for the A10, A13 and A20
for example, or A23/A33, which have a lot of clocks in common too.

Maxime

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

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