linux-kernel - Re: [PATCH 01/19] clk: sunxi: Add display clock

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Date:	Fri, 6 Nov 2015 11:42:20 -0800
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Chen-Yu Tsai <wens@...e.org>
Cc:	Mike Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	David Airlie <airlied@...ux.ie>,
	Thierry Reding <thierry.reding@...il.com>,
	devicetree <devicetree@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-clk <linux-clk@...r.kernel.org>,
	dri-devel <dri-devel@...ts.freedesktop.org>,
	linux-sunxi <linux-sunxi@...glegroups.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Hans de Goede <hdegoede@...hat.com>,
	Alexander Kaplan <alex@...tthing.co>,
	Wynter Woods <wynter@...tthing.co>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Rob Clark <robdclark@...il.com>,
	Daniel Vetter <daniel@...ll.ch>
Subject: Re: [PATCH 01/19] clk: sunxi: Add display clock

Hi,

On Sat, Oct 31, 2015 at 06:28:16PM +0800, Chen-Yu Tsai wrote:
> Hi,
> 
> On Fri, Oct 30, 2015 at 10:20 PM, Maxime Ripard
> <maxime.ripard@...e-electrons.com> wrote:
> > The A10 SoCs and its relatives has a special clock controller to drive the
> > display engines (both frontend and backend).
> >
> > Add a driver for it.
> >
> > Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
> > ---
> >  drivers/clk/sunxi/Makefile            |   1 +
> >  drivers/clk/sunxi/clk-sun4i-display.c | 199 ++++++++++++++++++++++++++++++++++
> >  2 files changed, 200 insertions(+)
> >  create mode 100644 drivers/clk/sunxi/clk-sun4i-display.c
> >
> > diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile
> > index cb4c299214ce..a9e1a5885846 100644
> > --- a/drivers/clk/sunxi/Makefile
> > +++ b/drivers/clk/sunxi/Makefile
> > @@ -9,6 +9,7 @@ obj-y += clk-a10-mod1.o
> >  obj-y += clk-a10-pll2.o
> >  obj-y += clk-a20-gmac.o
> >  obj-y += clk-mod0.o
> > +obj-y += clk-sun4i-display.o
> >  obj-y += clk-simple-gates.o
> >  obj-y += clk-sun8i-mbus.o
> >  obj-y += clk-sun9i-core.o
> > diff --git a/drivers/clk/sunxi/clk-sun4i-display.c b/drivers/clk/sunxi/clk-sun4i-display.c
> > new file mode 100644
> > index 000000000000..f13b095c6d7a
> > --- /dev/null
> > +++ b/drivers/clk/sunxi/clk-sun4i-display.c
> > @@ -0,0 +1,199 @@
> > +/*
> > + * Copyright 2015 Maxime Ripard
> > + *
> > + * Maxime Ripard <maxime.ripard@...e-electrons.com>
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License as published by
> > + * the Free Software Foundation; either version 2 of the License, or
> > + * (at your option) any later version.
> > + *
> > + * This program is distributed in the hope that it will be useful,
> > + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> > + * GNU General Public License for more details.
> > + */
> > +
> > +#include <linux/clk-provider.h>
> > +#include <linux/of_address.h>
> > +#include <linux/reset-controller.h>
> > +#include <linux/slab.h>
> > +#include <linux/spinlock.h>
> > +
> > +#define SUN4I_A10_DISPLAY_PARENTS      3
> 
> Can we change this to 4, so we can reuse this for TCON clocks on
> sun4i/sun7i?

Good point, I'll change this.

Thanks!
Maxime

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

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