linux-kernel - RE: [PATCH 2/2] ARM: dts: imx7s: add snvs rtc clock

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Message-ID: <AM3PR04MB1315E7F99FAB7F0720B37756F5100@AM3PR04MB1315.eurprd04.prod.outlook.com>
Date:   Tue, 9 Jan 2018 02:20:57 +0000
From:   Anson Huang <anson.huang@....com>
To:     Dong Aisheng <dongas86@...il.com>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        "mturquette@...libre.com" <mturquette@...libre.com>,
        "sboyd@...eaurora.org" <sboyd@...eaurora.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "stefan@...er.ch" <stefan@...er.ch>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>
Subject: RE: [PATCH 2/2] ARM: dts: imx7s: add snvs rtc clock



Best Regards!
Anson Huang


> -----Original Message-----
> From: Dong Aisheng [mailto:dongas86@...il.com]
> Sent: 2018-01-09 10:17 AM
> To: Anson Huang <anson.huang@....com>
> Cc: linux-arm-kernel@...ts.infradead.org; linux-clk@...r.kernel.org; linux-
> kernel@...r.kernel.org; devicetree@...r.kernel.org; dl-linux-imx <linux-
> imx@....com>; shawnguo@...nel.org; kernel@...gutronix.de; Fabio
> Estevam <fabio.estevam@....com>; mturquette@...libre.com;
> sboyd@...eaurora.org; robh+dt@...nel.org; mark.rutland@....com;
> stefan@...er.ch; linux@...linux.org.uk
> Subject: Re: [PATCH 2/2] ARM: dts: imx7s: add snvs rtc clock
> 
> On Tue, Jan 09, 2018 at 01:43:25AM +0000, Anson Huang wrote:
> >
> >
> > Best Regards!
> > Anson Huang
> >
> >
> > > -----Original Message-----
> > > From: Dong Aisheng [mailto:dongas86@...il.com]
> > > Sent: 2018-01-08 6:39 PM
> > > To: Anson Huang <anson.huang@....com>
> > > Cc: linux-arm-kernel@...ts.infradead.org; linux-clk@...r.kernel.org;
> > > linux- kernel@...r.kernel.org; devicetree@...r.kernel.org;
> > > dl-linux-imx <linux- imx@....com>; shawnguo@...nel.org;
> > > kernel@...gutronix.de; Fabio Estevam <fabio.estevam@....com>;
> > > mturquette@...libre.com; sboyd@...eaurora.org; robh+dt@...nel.org;
> > > mark.rutland@....com; stefan@...er.ch; linux@...linux.org.uk
> > > Subject: Re: [PATCH 2/2] ARM: dts: imx7s: add snvs rtc clock
> > >
> > > On Thu, Jan 04, 2018 at 11:06:42PM +0800, Anson Huang wrote:
> > > > Add i.MX7 SNVS RTC clock.
> > > >
> > > > Signed-off-by: Anson Huang <Anson.Huang@....com>
> > >
> > > If this clock IMX7D_SNVS_CLK is used for all SNVS sub modules, then
> > > snvs_poweroff and snvs_pwrkey should also rely on it, right?
> > >
> > > How about add them all in one time?
> > >
> > > BTW, syscon-poweroff seems still not introduce clock support and
> > > fsl,sec-v4.0- pwrkey also does not handle clock, they may need to be added
> later.
> > >
> > > Regards
> > > Dong Aisheng
> >
> > Yes, I thought about it before sending patch, but currently the
> > poweroff and pwrkey driver do NOT handle clocks, so I plan to add them later,
> including handling clocks in driver and dtb.
> >
> 
> SNVS RTC binding doc does not claim a optional clock support, you probably
> may need update the binding doc as well.
> 
> BTW, Should mx6 platforms need the same fixes?
> If yes, we'd better fix them all.

I.MX6 platforms has no such SNVS CCGR clock gate, no need to change.
OK, I will update the SNVS RTC binding doc and send out a V2 patch set.

Anson.

> 
> Regards
> Dong Aisheng
> 
> > Anson
> >
> > >
> > > > ---
> > > >  arch/arm/boot/dts/imx7s.dtsi | 2 ++
> > > >  1 file changed, 2 insertions(+)
> > > >
> > > > diff --git a/arch/arm/boot/dts/imx7s.dtsi
> > > > b/arch/arm/boot/dts/imx7s.dtsi index e718fd2..f9b97f3 100644
> > > > --- a/arch/arm/boot/dts/imx7s.dtsi
> > > > +++ b/arch/arm/boot/dts/imx7s.dtsi
> > > > @@ -534,6 +534,8 @@
> > > >  					offset = <0x34>;
> > > >  					interrupts = <GIC_SPI 19
> > > IRQ_TYPE_LEVEL_HIGH>,
> > > >  						     <GIC_SPI 20
> > > IRQ_TYPE_LEVEL_HIGH>;
> > > > +					clocks = <&clks IMX7D_SNVS_CLK>;
> > > > +					clock-names = "snvs-rtc";
> > > >  				};
> > > >
> > > >  				snvs_poweroff: snvs-poweroff {
> > > > --
> > > > 1.9.1
> > > >
> > > > --
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