linux-kernel - Re: [PATCH 1/3] dt-bindings: net: ti,cc1352p7: Add boot-gpio

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Message-ID: <20240719-scuttle-strongbox-e573441c45e6@spud>
Date: Fri, 19 Jul 2024 15:55:50 +0100
From: Conor Dooley <conor@...nel.org>
To: Ayush Singh <ayush@...gleboard.org>
Cc: jkridner@...gleboard.org, robertcnelson@...gleboard.org,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Nishanth Menon <nm@...com>,
	Vignesh Raghavendra <vigneshr@...com>,
	Tero Kristo <kristo@...nel.org>, Johan Hovold <johan@...nel.org>,
	Alex Elder <elder@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	greybus-dev@...ts.linaro.org, netdev@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/3] dt-bindings: net: ti,cc1352p7: Add boot-gpio

On Fri, Jul 19, 2024 at 03:15:10PM +0530, Ayush Singh wrote:
> boot-gpio (along with reset-gpio) is used to enable bootloader backdoor
> for flashing new firmware.
> 
> The pin and pin level to enabel bootloader backdoor is configed using
> the following CCFG variables in cc1352p7:
> - SET_CCFG_BL_CONFIG_BL_PIN_NO
> - SET_CCFG_BL_CONFIG_BL_LEVEL
> 
> Signed-off-by: Ayush Singh <ayush@...gleboard.org>
> ---
>  Documentation/devicetree/bindings/net/ti,cc1352p7.yaml | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/ti,cc1352p7.yaml b/Documentation/devicetree/bindings/net/ti,cc1352p7.yaml
> index 3dde10de4630..a3511bb59b05 100644
> --- a/Documentation/devicetree/bindings/net/ti,cc1352p7.yaml
> +++ b/Documentation/devicetree/bindings/net/ti,cc1352p7.yaml
> @@ -29,6 +29,9 @@ properties:
>    reset-gpios:
>      maxItems: 1
>  
> +  boot-gpios:
> +    maxItems: 1

I think this needs a description that explains what this is actually
for, and "boot-gpios" is not really an accurate name for what it is used
for IMO.

> +
>    vdds-supply: true
>  
>  required:
> @@ -46,6 +49,7 @@ examples:
>          clocks = <&sclk_hf 0>, <&sclk_lf 25>;
>          clock-names = "sclk_hf", "sclk_lf";
>          reset-gpios = <&pio 35 GPIO_ACTIVE_LOW>;
> +        boot-gpios = <&pio 36 GPIO_ACTIVE_LOW>;
>          vdds-supply = <&vdds>;
>        };
>      };
> 
> -- 
> 2.45.2
> 

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