linux-kernel - Re: [PATCH v9 06/10] clk: mediatek: Add MT2701 clock support

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Date:	Mon, 15 Aug 2016 11:00:34 +0800
From:	James Liao <jamesjj.liao@...iatek.com>
To:	Stephen Boyd <sboyd@...eaurora.org>
CC:	Erin Lo <erin.lo@...iatek.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Mike Turquette <mturquette@...libre.com>,
	"Rob Herring" <robh@...nel.org>, John Crispin <blogic@...nwrt.org>,
	"Arnd Bergmann" <arnd@...db.de>,
	Sascha Hauer <kernel@...gutronix.de>,
	"Daniel Kurtz" <djkurtz@...omium.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	<devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	<linux-mediatek@...ts.infradead.org>, <linux-clk@...r.kernel.org>,
	<srv_heupstream@...iatek.com>,
	Shunli Wang <shunli.wang@...iatek.com>
Subject: Re: [PATCH v9 06/10] clk: mediatek: Add MT2701 clock support

Hi Stephen,

On Fri, 2016-08-12 at 17:44 -0700, Stephen Boyd wrote:
> On 06/22, Erin Lo wrote:
> > diff --git a/drivers/clk/mediatek/clk-mt2701-bdp.c b/drivers/clk/mediatek/clk-mt2701-bdp.c
> > new file mode 100644
> > index 0000000..81f628c
> > --- /dev/null
> > +++ b/drivers/clk/mediatek/clk-mt2701-bdp.c
> > @@ -0,0 +1,140 @@
> > +/*
> > + * Copyright (c) 2014 MediaTek Inc.
> > + * Author: Shunli Wang <shunli.wang@...iatek.com>
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License version 2 as
> > + * published by the Free Software Foundation.
> > + *
> > + * 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.h>
> 
> Is this include used? I would expect clk-provider.h instead.

Yes, it can be replaced with clk-provider.h. I'll change it in next
patch series.

> > +#include <linux/platform_device.h>
> > +
> > +#include "clk-mtk.h"
> > +#include "clk-gate.h"
> > +
> > +#include <dt-bindings/clock/mt2701-clk.h>
> > +
> [..]
> > +
> > +static void mtk_bdpsys_init(struct device_node *node)
> > +{
> > +	struct clk_onecell_data *clk_data;
> > +	int r;
> > +
> > +	clk_data = mtk_alloc_clk_data(CLK_BDP_NR);
> > +
> > +	mtk_clk_register_gates(node, bdp_clks, ARRAY_SIZE(bdp_clks),
> > +						clk_data);
> > +
> > +	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
> 
> Is it possible to move to of_clk_add_hw_provider()? It can be
> done later if that would mean changing all
> mtk_clk_register_gates() users.

I would like to keep current implementation due to test/integration
effort. I prefer to apply clk_hw related APIs on new clk drivers instead
of modify existing drivers.


Best regards,

James