linux-kernel - Re: [PATCH v3 08/12] arm64: dts: renesas: r9a08g045: Add RTC node

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Message-ID: <4ff318b0-cd7c-4857-888c-a07c8985fce9@tuxon.dev>
Date: Fri, 11 Oct 2024 13:28:55 +0300
From: claudiu beznea <claudiu.beznea@...on.dev>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: mturquette@...libre.com, sboyd@...nel.org, robh@...nel.org,
 krzk+dt@...nel.org, conor+dt@...nel.org, alexandre.belloni@...tlin.com,
 magnus.damm@...il.com, p.zabel@...gutronix.de,
 linux-renesas-soc@...r.kernel.org, linux-clk@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-rtc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH v3 08/12] arm64: dts: renesas: r9a08g045: Add RTC node

Hi, Geert,

On 10.10.2024 18:22, Geert Uytterhoeven wrote:
> Hi Claudiu,
> 
> On Fri, Aug 30, 2024 at 3:02 PM Claudiu <claudiu.beznea@...on.dev> wrote:
>> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
>>
>> Add the DT node for the RTC IP available on the Renesas RZ/G3S SoC.
>>
>> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
>> ---
>>
>> Changes in v3:
>> - added CPG clock, power domain, reset
>> - and assigned-clocks, assigned-clock-parents to configure the
>>   VBATTCLK
>> - included dt-bindings/clock/r9a08g045-vbattb.h
> 
> Thanks for your patch!
> 
>> --- a/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
>> +++ b/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
>> @@ -160,6 +161,22 @@ i2c3: i2c@...90c00 {
>>                         status = "disabled";
>>                 };
>>
>> +               rtc: rtc@...4ec00 {
> 
> Please insert this after serial@...4b800, to preserve sort order.

You're right. I though I have already checked this.

> 
>> +                       compatible = "renesas,r9a08g045-rtca3", "renesas,rz-rtca3";
>> +                       reg = <0 0x1004ec00 0 0x400>;
>> +                       interrupts = <GIC_SPI 315 IRQ_TYPE_LEVEL_HIGH>,
>> +                                    <GIC_SPI 316 IRQ_TYPE_LEVEL_HIGH>,
>> +                                    <GIC_SPI 317 IRQ_TYPE_LEVEL_HIGH>;
>> +                       interrupt-names = "alarm", "period", "carry";
>> +                       clocks = <&cpg CPG_MOD R9A08G045_VBAT_BCLK>, <&vbattb VBATTB_VBATTCLK>;
>> +                       clock-names = "bus", "counter";
>> +                       assigned-clocks = <&vbattb VBATTB_MUX>;
>> +                       assigned-clock-parents = <&vbattb VBATTB_XC>;
> 
> Don't the assigned-clock* properties belong in the board DTS?

It makes sense to be in the board DTS, indeed.

> In addition, I think they should be documented in the DT bindings,
> and be made required, so board developers don't forget about them.

It would be better, indeed.

Thank you,
Claudiu Beznea

> 
>> +                       power-domains = <&cpg>;
>> +                       resets = <&cpg R9A08G045_VBAT_BRESETN>;
>> +                       status = "disabled";
>> +               };
>> +
>>                 vbattb: vbattb@...5c000 {
>>                         compatible = "renesas,r9a08g045-vbattb";
>>                         reg = <0 0x1005c000 0 0x1000>;
> 
> The rest LGTM.
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
>