linux-kernel - Re: [PATCH v2 4/6] clk: mediatek: Add MT2701 clock support

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Message-ID: <1451987940.19662.0.camel@mtksdaap41>
Date:	Tue, 5 Jan 2016 17:59:00 +0800
From:	James Liao <jamesjj.liao@...iatek.com>
To:	Philipp Zabel <p.zabel@...gutronix.de>
CC:	Matthias Brugger <matthias.bgg@...il.com>,
	Mike Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	<devicetree@...r.kernel.org>, Sascha Hauer <kernel@...gutronix.de>,
	<srv_heupstream@...iatek.com>, <linux-kernel@...r.kernel.org>,
	Daniel Kurtz <djkurtz@...omium.org>,
	<linux-mediatek@...ts.infradead.org>,
	Shunli Wang <shunli.wang@...iatek.com>,
	<linux-clk@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 4/6] clk: mediatek: Add MT2701 clock support

Hi Philipp,

On Tue, 2016-01-05 at 10:30 +0100, Philipp Zabel wrote:
> Hi James,
> 
> Am Dienstag, den 05.01.2016, 14:30 +0800 schrieb James Liao:
> > From: Shunli Wang <shunli.wang@...iatek.com>
> > 
> > Add MT2701 clock support, include topckgen, apmixedsys,
> > infracfg, pericfg and subsystem clocks.
> > 
> > Signed-off-by: Shunli Wang <shunli.wang@...iatek.com>
> > Signed-off-by: James Liao <jamesjj.liao@...iatek.com>
> > ---
> >  drivers/clk/mediatek/Kconfig      |    8 +
> >  drivers/clk/mediatek/Makefile     |    1 +
> >  drivers/clk/mediatek/clk-gate.c   |   56 ++
> >  drivers/clk/mediatek/clk-gate.h   |    2 +
> >  drivers/clk/mediatek/clk-mt2701.c | 1210 +++++++++++++++++++++++++++++++++++++
> >  drivers/clk/mediatek/clk-mtk.c    |   25 +
> >  drivers/clk/mediatek/clk-mtk.h    |   35 +-
> >  7 files changed, 1334 insertions(+), 3 deletions(-)
> >  create mode 100644 drivers/clk/mediatek/clk-mt2701.c
> > 
> > diff --git a/drivers/clk/mediatek/Kconfig b/drivers/clk/mediatek/Kconfig
> > index dc224e6..6c7cdc0 100644
> > --- a/drivers/clk/mediatek/Kconfig
> > +++ b/drivers/clk/mediatek/Kconfig
> > @@ -6,6 +6,14 @@ config COMMON_CLK_MEDIATEK
> >  	---help---
> >  	  Mediatek SoCs' clock support.
> >  
> > +config COMMON_CLK_MT2701
> > +	bool "Clock driver for Mediatek MT2701 and MT7623"
> > +	depends on COMMON_CLK
> > +	select COMMON_CLK_MEDIATEK
> > +	default ARCH_MEDIATEK
> > +	---help---
> > +	  This driver supports Mediatek MT2701 and MT7623 clocks.
> > +
> >  config COMMON_CLK_MT8135
> >  	bool "Clock driver for Mediatek MT8135"
> >  	depends on COMMON_CLK
> > diff --git a/drivers/clk/mediatek/Makefile b/drivers/clk/mediatek/Makefile
> > index 32e7222..5b2b91b 100644
> > --- a/drivers/clk/mediatek/Makefile
> > +++ b/drivers/clk/mediatek/Makefile
> > @@ -1,4 +1,5 @@
> >  obj-$(CONFIG_COMMON_CLK_MEDIATEK) += clk-mtk.o clk-pll.o clk-gate.o clk-apmixed.o
> >  obj-$(CONFIG_RESET_CONTROLLER) += reset.o
> > +obj-$(CONFIG_COMMON_CLK_MT2701) += clk-mt2701.o
> >  obj-$(CONFIG_COMMON_CLK_MT8135) += clk-mt8135.o
> >  obj-$(CONFIG_COMMON_CLK_MT8173) += clk-mt8173.o
> > diff --git a/drivers/clk/mediatek/clk-gate.c b/drivers/clk/mediatek/clk-gate.c
> > index 576bdb7..38badb4 100644
> > --- a/drivers/clk/mediatek/clk-gate.c
> > +++ b/drivers/clk/mediatek/clk-gate.c
> > @@ -61,6 +61,26 @@ static void mtk_cg_clr_bit(struct clk_hw *hw)
> >  	regmap_write(cg->regmap, cg->clr_ofs, BIT(cg->bit));
> >  }
> >  
> > +static void mtk_cg_set_bit_no_setclr(struct clk_hw *hw)
> > +{
> > +	struct mtk_clk_gate *cg = to_clk_gate(hw);
> > +	u32 val;
> > +
> > +	regmap_read(cg->regmap, cg->sta_ofs, &val);
> > +	val |= BIT(cg->bit);
> > +	regmap_write(cg->regmap, cg->sta_ofs, val);
> 
> You can use regmap_update_bits here:
> 
> 	u32 bit = BIT(cg->bit);
> 	regmap_update_bits(cg->regmap, cg->sta_ofs, bit, bit);
> 
> > +}
> > +
> > +static void mtk_cg_clr_bit_no_setclr(struct clk_hw *hw)
> > +{
> > +	struct mtk_clk_gate *cg = to_clk_gate(hw);
> > +	u32 val;
> > +
> > +	regmap_read(cg->regmap, cg->sta_ofs, &val);
> > +	val &= ~(BIT(cg->bit));
> > +	regmap_write(cg->regmap, cg->sta_ofs, val);
> 
> and here:
> 
> 	u32 bit = BIT(cg->bit);
> 	regmap_update_bits(cg->regmap, cg->sta_ofs, bit, 0);

OK. I'll change it in next patch. Thanks.


Best regards,

James


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