linux-kernel - Re: [PATCH v2 4/6] soc: mediatek: Add SMI driver

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Message-ID: <1432193908.5092.14.camel@mhfsdcap03>
Date:	Thu, 21 May 2015 15:38:28 +0800
From:	Yong Wu <yong.wu@...iatek.com>
To:	Matthias Brugger <matthias.bgg@...il.com>
CC:	Rob Herring <robh+dt@...nel.org>, Joerg Roedel <joro@...tes.org>,
	"Robin Murphy" <robin.murphy@....com>,
	Will Deacon <will.deacon@....com>,
	"Daniel Kurtz" <djkurtz@...gle.com>,
	Tomasz Figa <tfiga@...gle.com>,
	Lucas Stach <l.stach@...gutronix.de>,
	Mark Rutland <mark.rutland@....com>,
	"Catalin Marinas" <catalin.marinas@....com>,
	<linux-mediatek@...ts.infradead.org>,
	Sasha Hauer <kernel@...gutronix.de>,
	srv_heupstream <srv_heupstream@...iatek.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	<iommu@...ts.linux-foundation.org>,
	Paul Bolle <pebolle@...cali.nl>, Arnd Bergmann <arnd@...db.de>,
	<mitchelh@...eaurora.org>, <k.zhang@...iatek.com>,
	<youhua.li@...iatek.com>
Subject: Re: [PATCH v2 4/6] soc: mediatek: Add SMI driver

On Thu, 2015-05-21 at 09:30 +0200, Matthias Brugger wrote:
> 2015-05-21 8:16 GMT+02:00 Yong Wu <yong.wu@...iatek.com>:
> > Hi Matthias,
> >      Thanks very much for your suggestion.
> >      Abort the smi clock name, Could you help check below.
> >      The others I will improve in next time.
> >
> > On Tue, 2015-05-19 at 13:14 +0200, Matthias Brugger wrote:
> >> 2015-05-15 11:43 GMT+02:00 Yong Wu <yong.wu@...iatek.com>:
> >> >     This patch add SMI(Smart Multimedia Interface) driver. This driver is
> >> > responsible to enable/disable iommu and control the clocks of each local arbiter.
> >> >
> > [snip]
> >> > +
> >> > +#define SMI_LARB_MMU_EN                (0xf00)
> >> > +#define F_SMI_MMU_EN(port)     (1 << (port))
> >> > +
> >> > +enum {
> >> > +       MTK_CLK_APB,
> >> > +       MTK_CLK_SMI,
> >> > +       MTK_CLK_MAX,
> >>
> >> Maybe add something like:
> >> MTK_CLK_FIRST = MTK_CLK_APB,
> >> to make the for loops better readable.
> >>
> > Then, Is it like this? :
> >  enum {
> >         MTK_CLK_FIRST = MTK_CLK_APB,
> >         MTK_CLK_SMI,
> >         MTK_CLK_MAX,
> >  }
> > or the CLK_SMI also need MTK_CLK_SECOND = MTK_CLK_SMI.
> 
> 
> something like:
> enum {
>          MTK_CLK_FIRST,
>          MTK_CLK_APB = MTK_CLK_FIRST,
>          MTK_CLK_SMI,
>          MTK_CLK_LAST,
> }
> 
> So you can rewrite the for loop:
> if (i = MTK_CLK_FIRST; i < MTK_CLK_LAST; i++)
Get it.
Thanks very much.
> 
> Regards,
> Matthias
> 
> >> > +};
> >> > +
> >> > +struct mtk_smi_common {
> >> > +       void __iomem            *base;
> >>
> >> That seems to be never used. Please delete it.
> >>
> >> > +       struct clk              *clk[MTK_CLK_MAX];
> >> > +};
> >> > +
> >> > +struct mtk_smi_larb {
> >> > +       void __iomem            *base;
> >> > +       spinlock_t              portlock; /* lock for config port */
> >> > +       struct clk              *clk[MTK_CLK_MAX];
> >> > +       struct device           *smi;
> >> > +};
> >> > +
> >> Thanks,
> >> Matthias
> >
> >
> 
> 
> 


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