linux-kernel - Re: [PATCH 2/2] clk: mediatek: add pericfg clocks for MT8183

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Date:   Wed, 28 Aug 2019 15:47:44 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Weiyi Lu <weiyi.lu@...iatek.com>
CC:     Rob Herring <robh+dt@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
        "Mark Rutland" <mark.rutland@....com>,
        Michael Turquette <mturquette@...libre.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "Ryder Lee" <ryder.lee@...iatek.com>,
        Nicolas Boichat <drinkcat@...omium.org>,
        "Erin Lo" <erin.lo@...iatek.com>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH 2/2] clk: mediatek: add pericfg clocks for MT8183

Hi Weiyi,

On Wed, 2019-08-28 at 14:55 +0800, Weiyi Lu wrote:
> On Wed, 2019-08-28 at 13:55 +0800, Chunfeng Yun wrote:
> > Add pericfg clocks for MT8183, it's used when support USB
> > remote wakeup
> > 
> > Cc: Weiyi Lu <weiyi.lu@...iatek.com>
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> > ---
> >  drivers/clk/mediatek/clk-mt8183.c      | 35 ++++++++++++++++++++++++++
> >  include/dt-bindings/clock/mt8183-clk.h |  4 +++
> >  2 files changed, 39 insertions(+)
> > 
> > diff --git a/drivers/clk/mediatek/clk-mt8183.c b/drivers/clk/mediatek/clk-mt8183.c
> > index 1aa5f4059251..b19221bad0c9 100644
> > --- a/drivers/clk/mediatek/clk-mt8183.c
> > +++ b/drivers/clk/mediatek/clk-mt8183.c
> > @@ -999,6 +999,25 @@ static const struct mtk_gate infra_clks[] = {
> >  		"msdc50_0_sel", 24),
> >  };
> >  
> > +static const struct mtk_gate_regs peri_cg_regs = {
> > +	.set_ofs = 0x20c,
> > +	.clr_ofs = 0x20c,
> > +	.sta_ofs = 0x20c,
> > +};
> > +
> > +#define GATE_PERI(_id, _name, _parent, _shift) {	\
> > +	.id = _id,				\
> > +	.name = _name,				\
> > +	.parent_name = _parent,			\
> > +	.regs = &peri_cg_regs,			\
> > +	.shift = _shift,			\
> > +	.ops = &mtk_clk_gate_ops_no_setclr_inv,	\
> > +}
> 
> Hi Chunfeng,
> 
> I suggest
> 
> #define GATE_PERI(_id, _name, _parent, _shift)		\
> 	GATE_MTK(_id, _name, _parent, &peri_cg_regs, _shift,	\
> 		&mtk_clk_gate_ops_no_setclr_inv)
> 
Good point, thanks

> > +
> > +static const struct mtk_gate peri_clks[] = {
> > +	GATE_PERI(CLK_PERI_AXI, "periaxi", "axi_sel", 31),
> > +};
> > +
> >  static const struct mtk_gate_regs apmixed_cg_regs = {
> >  	.set_ofs = 0x20,
> >  	.clr_ofs = 0x20,
> > @@ -1194,6 +1213,19 @@ static int clk_mt8183_infra_probe(struct platform_device *pdev)
> >  	return of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
> >  }
> >  
> > +static int clk_mt8183_peri_probe(struct platform_device *pdev)
> > +{
> > +	struct clk_onecell_data *clk_data;
> > +	struct device_node *node = pdev->dev.of_node;
> > +
> > +	clk_data = mtk_alloc_clk_data(CLK_PERI_NR_CLK);
> > +
> > +	mtk_clk_register_gates(node, peri_clks, ARRAY_SIZE(peri_clks),
> > +			       clk_data);
> > +
> > +	return of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
> > +}
> > +
> >  static int clk_mt8183_mcu_probe(struct platform_device *pdev)
> >  {
> >  	struct clk_onecell_data *clk_data;
> > @@ -1223,6 +1255,9 @@ static const struct of_device_id of_match_clk_mt8183[] = {
> >  	}, {
> >  		.compatible = "mediatek,mt8183-infracfg",
> >  		.data = clk_mt8183_infra_probe,
> > +	}, {
> > +		.compatible = "mediatek,mt8183-pericfg",
> > +		.data = clk_mt8183_peri_probe,
> >  	}, {
> >  		.compatible = "mediatek,mt8183-mcucfg",
> >  		.data = clk_mt8183_mcu_probe,
> > diff --git a/include/dt-bindings/clock/mt8183-clk.h b/include/dt-bindings/clock/mt8183-clk.h
> > index 0046506eb24c..a7b470b0ec8a 100644
> > --- a/include/dt-bindings/clock/mt8183-clk.h
> > +++ b/include/dt-bindings/clock/mt8183-clk.h
> > @@ -284,6 +284,10 @@
> >  #define CLK_INFRA_FBIST2FPC		100
> >  #define CLK_INFRA_NR_CLK		101
> >  
> > +/* PERICFG */
> > +#define CLK_PERI_AXI			0
> > +#define CLK_PERI_NR_CLK			1
> > +
> >  /* MFGCFG */
> >  #define CLK_MFG_BG3D			0
> >  #define CLK_MFG_NR_CLK			1
> 
>