linux-kernel - Re: [PATCH v1 05/12] ARM: dts: microchip: sam9x60: Add OTPC node

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Message-ID: <1468f33b-e7ab-4c9f-9328-8fba75a41939@tuxon.dev>
Date: Sat, 24 Aug 2024 18:56:49 +0300
From: claudiu beznea <claudiu.beznea@...on.dev>
To: Alexander Dahl <ada@...rsis.com>
Cc: Christian Melki <christian.melki@...ata.com>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
 <devicetree@...r.kernel.org>, open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 05/12] ARM: dts: microchip: sam9x60: Add OTPC node



On 21.08.2024 13:59, Alexander Dahl wrote:
> See datasheet (DS60001579G) sections "7. Memories" and "23. OTP Memory
> Controller (OTPC)" for reference.

Please detail here what the patch does and why it is necessary. Sending the
reader to some DS chapters w/o any additional information may be worthless.

> 
> Signed-off-by: Alexander Dahl <ada@...rsis.com>
> ---
>  arch/arm/boot/dts/microchip/sam9x60.dtsi | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/microchip/sam9x60.dtsi b/arch/arm/boot/dts/microchip/sam9x60.dtsi
> index 291540e5d81e..2159a6817f44 100644
> --- a/arch/arm/boot/dts/microchip/sam9x60.dtsi
> +++ b/arch/arm/boot/dts/microchip/sam9x60.dtsi
> @@ -14,6 +14,7 @@
>  #include <dt-bindings/clock/at91.h>
>  #include <dt-bindings/mfd/at91-usart.h>
>  #include <dt-bindings/mfd/atmel-flexcom.h>
> +#include <dt-bindings/nvmem/microchip,sama7g5-otpc.h>
>  
>  / {
>  	#address-cells = <1>;
> @@ -156,6 +157,13 @@ sdmmc1: sdio-host@...00000 {
>  			status = "disabled";
>  		};
>  
> +		otpc: efuse@...00000 {
> +			compatible = "microchip,sam9x60-otpc", "syscon";
> +			reg = <0xeff00000 0xec>;
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +		};
> +
>  		apb {
>  			compatible = "simple-bus";
>  			#address-cells = <1>;