linux-kernel - Re: [PATCH] ARM: dts: at91: sam9x60_curiosity: Add mandatory dt property for RTT

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Date:   Fri, 29 Sep 2023 21:06:46 +0300
From:   claudiu beznea <claudiu.beznea@...on.dev>
To:     nicolas.ferre@...rochip.com, linux-arm-kernel@...ts.infradead.org
Cc:     Alexandre Belloni <alexandre.belloni@...tlin.com>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Tudor Ambarus <tudor.ambarus@...aro.org>
Subject: Re: [PATCH] ARM: dts: at91: sam9x60_curiosity: Add mandatory dt
 property for RTT



On 28.09.2023 17:36, nicolas.ferre@...rochip.com wrote:
> From: Tudor Ambarus <tudor.ambarus@...aro.org>
> 
> atmel,rtt-rtc-time-reg is a mandatory property and encodes the GPBR
> register used to store the time base when the RTT is used as an RTC.
> Align the RTT with what's currently done for sam9x60ek and sama7g5ek,
> and enable it by default even if RTC is also enabled.
> 
> Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
> [nicolas.ferre@...rochip.com: adapt to newer kernel]
> Signed-off-by: Nicolas Ferre <nicolas.ferre@...rochip.com>

Reviewed-by: Claudiu Beznea <claudiu.beznea@...on.dev>

> ---
>  arch/arm/boot/dts/microchip/at91-sam9x60_curiosity.dts | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/microchip/at91-sam9x60_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sam9x60_curiosity.dts
> index cb86a3a170ce..83372c1f291b 100644
> --- a/arch/arm/boot/dts/microchip/at91-sam9x60_curiosity.dts
> +++ b/arch/arm/boot/dts/microchip/at91-sam9x60_curiosity.dts
> @@ -439,6 +439,10 @@ &pwm0 {
>  	status = "okay";
>  };
>  
> +&rtt {
> +	atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
> +};
> +
>  &sdmmc0 {
>  	bus-width = <4>;
>  	pinctrl-names = "default";