linux-kernel - Re: [PATCH v3 1/5] ARM: dts: at91: Add the required `atmel,rtt-rtc-time-reg` property

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Date:   Fri, 4 Mar 2022 15:53:48 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Sergiu Moga <sergiu.moga@...rochip.com>
Cc:     a.zummo@...ertech.it, robh+dt@...nel.org,
        krzysztof.kozlowski@...onical.com, nicolas.ferre@...rochip.com,
        claudiu.beznea@...rochip.com, linux-rtc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/5] ARM: dts: at91: Add the required
 `atmel,rtt-rtc-time-reg` property

On 04/03/2022 16:27:42+0200, Sergiu Moga wrote:
> Add the required `atmel,rtt-rtc-time-reg` property to the `rtt` nodes
> of the board files that were missing it.
> 
> Signed-off-by: Sergiu Moga <sergiu.moga@...rochip.com>
> ---
>  arch/arm/boot/dts/at91sam9261ek.dts | 4 ++++
>  arch/arm/boot/dts/at91sam9263ek.dts | 8 ++++++++
>  arch/arm/boot/dts/at91sam9rlek.dts  | 4 ++++
>  3 files changed, 16 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/at91sam9261ek.dts b/arch/arm/boot/dts/at91sam9261ek.dts
> index beed819609e8..3c1f40b4a13e 100644
> --- a/arch/arm/boot/dts/at91sam9261ek.dts
> +++ b/arch/arm/boot/dts/at91sam9261ek.dts
> @@ -178,6 +178,10 @@ dbgu: serial@...ff200 {
>  				status = "okay";
>  			};
>  
> +			rtc@...ffd20 {
> +				atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
> +			};
> +
>  			watchdog@...ffd40 {
>  				status = "okay";
>  			};
> diff --git a/arch/arm/boot/dts/at91sam9263ek.dts b/arch/arm/boot/dts/at91sam9263ek.dts
> index 71f60576761a..1208bb580d14 100644
> --- a/arch/arm/boot/dts/at91sam9263ek.dts
> +++ b/arch/arm/boot/dts/at91sam9263ek.dts
> @@ -102,6 +102,14 @@ mtd_dataflash@0 {
>  				};
>  			};
>  
> +			rtc@...ffd20 {
> +				atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
> +			};
> +
> +			rtc@...ffd50 {
> +				atmel,rtt-rtc-time-reg = <&gpbr 0x4>;
> +			};

Do we really need two RTCs with the exact same features on that board?
Is there a check failure hen the property is not there and the node is
disabled?

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com