linux-kernel - RE: [PATCH 5/6] arm64: dts: renesas: r9a09g057: Add RTC node

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Message-ID:
 <TY3PR01MB11346C43D1C7B52B2E8580AD686F5A@TY3PR01MB11346.jpnprd01.prod.outlook.com>
Date: Mon, 20 Oct 2025 08:25:55 +0000
From: Biju Das <biju.das.jz@...renesas.com>
To: Ovidiu Panait <ovidiu.panait.rb@...esas.com>, Claudiu Beznea
	<claudiu.beznea.uj@...renesas.com>, "alexandre.belloni@...tlin.com"
	<alexandre.belloni@...tlin.com>, "robh@...nel.org" <robh@...nel.org>,
	"krzk+dt@...nel.org" <krzk+dt@...nel.org>, "conor+dt@...nel.org"
	<conor+dt@...nel.org>, "geert+renesas@...der.be" <geert+renesas@...der.be>,
	magnus.damm <magnus.damm@...il.com>, "mturquette@...libre.com"
	<mturquette@...libre.com>, "sboyd@...nel.org" <sboyd@...nel.org>,
	"p.zabel@...gutronix.de" <p.zabel@...gutronix.de>
CC: "linux-rtc@...r.kernel.org" <linux-rtc@...r.kernel.org>,
	"linux-renesas-soc@...r.kernel.org" <linux-renesas-soc@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>
Subject: RE: [PATCH 5/6] arm64: dts: renesas: r9a09g057: Add RTC node



> -----Original Message-----
> From: Ovidiu Panait <ovidiu.panait.rb@...esas.com>
> Sent: 20 October 2025 09:13
> Subject: RE: [PATCH 5/6] arm64: dts: renesas: r9a09g057: Add RTC node
> 
> Hi Biju,
> 
> > -----Original Message-----
> > From: Biju Das <biju.das.jz@...renesas.com>
> > Sent: Sunday, October 19, 2025 1:16 PM
> > To: Ovidiu Panait <ovidiu.panait.rb@...esas.com>; Claudiu Beznea
> > <claudiu.beznea.uj@...renesas.com>; alexandre.belloni@...tlin.com;
> > robh@...nel.org; krzk+dt@...nel.org; conor+dt@...nel.org;
> > geert+renesas@...der.be; magnus.damm <magnus.damm@...il.com>;
> > mturquette@...libre.com; sboyd@...nel.org; p.zabel@...gutronix.de
> > Cc: linux-rtc@...r.kernel.org; linux-renesas-soc@...r.kernel.org;
> > devicetree@...r.kernel.org; linux-kernel@...r.kernel.org; linux-
> > clk@...r.kernel.org
> > Subject: RE: [PATCH 5/6] arm64: dts: renesas: r9a09g057: Add RTC node
> >
> >
> >
> > > -----Original Message-----
> > > From: Ovidiu Panait <ovidiu.panait.rb@...esas.com>
> > > Sent: 19 October 2025 10:21
> > > Subject: [PATCH 5/6] arm64: dts: renesas: r9a09g057: Add RTC node
> > >
> > > Add RTC node to Renesas RZ/V2H ("R9A09G057") SoC DTSI.
> > >
> > > Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@...esas.com>
> > > ---
> > >  arch/arm64/boot/dts/renesas/r9a09g057.dtsi | 14 ++++++++++++++
> > >  1 file changed, 14 insertions(+)
> > >
> > > diff --git a/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
> > b/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
> > > index 40b15f1db930..e426b9978e22 100644
> > > --- a/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
> > > +++ b/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
> > > @@ -591,6 +591,20 @@ wdt3: watchdog@...00400 {
> > >  			status = "disabled";
> > >  		};
> > >
> > > +		rtc: rtc@...00800 {
> > > +			compatible = "renesas,r9a09g057-rtca3", "renesas,rz-
> > rtca3";
> > > +			reg = <0 0x11c00800 0 0x400>;
> > > +			interrupts = <GIC_SPI 524 IRQ_TYPE_EDGE_RISING>,
> > > +				     <GIC_SPI 525 IRQ_TYPE_EDGE_RISING>,
> > > +				     <GIC_SPI 526 IRQ_TYPE_EDGE_RISING>;
> > > +			interrupt-names = "alarm", "period", "carry";
> > > +			clocks = <&cpg CPG_MOD 0x53>, <&rtxin_clk>;
> > > +			clock-names = "bus", "counter";
> > > +			power-domains = <&cpg>;
> > > +			resets = <&cpg 0x79>, <&cpg 0x7a>;
> >
> > Missing reset-names??
> >
> 
> The resets are retrieved using devm_reset_control_array_get_shared(),
> which does not rely on named reset entries. This keeps the implementation minimal and keeps it in sync
> with RZ/G3S, which also does not take the RTC reset by its name.
> 
> For this reason, I kept the rtca3 bindings without a reset-names property.

Thanks for the explanation.

Cheers,
Biju