linux-kernel - Re: [PATCH v2 2/2] ARM: dts: stm32: add resets property to m

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Message-ID: <59f25804-d310-4492-b95f-19c42cf3cd42@foss.st.com>
Date: Wed, 3 Sep 2025 15:10:42 +0200
From: Alexandre TORGUE <alexandre.torgue@...s.st.com>
To: Marc Kleine-Budde <mkl@...gutronix.de>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Chandrasekar Ramakrishnan
	<rcsekar@...sung.com>,
        Vincent Mailhol <mailhol.vincent@...adoo.fr>
CC: <devicetree@...r.kernel.org>, <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <kernel@...gutronix.de>, <linux-can@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] ARM: dts: stm32: add resets property to m_can
 nodes in the stm32mp153

Hi Marc

On 8/7/25 08:09, Marc Kleine-Budde wrote:
> On the STM32MP153 the m_cam IP cores (a.k.a. FDCAN) have an external
> shared reset in the RCC. Add the reset to both m_can nodes.
> 
> Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
> ---
>   arch/arm/boot/dts/st/stm32mp153.dtsi | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/st/stm32mp153.dtsi b/arch/arm/boot/dts/st/stm32mp153.dtsi
> index 4640dafb1598..92794b942ab2 100644
> --- a/arch/arm/boot/dts/st/stm32mp153.dtsi
> +++ b/arch/arm/boot/dts/st/stm32mp153.dtsi
> @@ -40,6 +40,7 @@ m_can1: can@...0e000 {
>   		interrupt-names = "int0", "int1";
>   		clocks = <&rcc CK_HSE>, <&rcc FDCAN_K>;
>   		clock-names = "hclk", "cclk";
> +		resets = <&rcc FDCAN_R>;
>   		bosch,mram-cfg = <0x0 0 0 32 0 0 2 2>;
>   		access-controllers = <&etzpc 62>;
>   		status = "disabled";
> @@ -54,6 +55,7 @@ m_can2: can@...0f000 {
>   		interrupt-names = "int0", "int1";
>   		clocks = <&rcc CK_HSE>, <&rcc FDCAN_K>;
>   		clock-names = "hclk", "cclk";
> +		resets = <&rcc FDCAN_R>;
>   		bosch,mram-cfg = <0x1400 0 0 32 0 0 2 2>;
>   		access-controllers = <&etzpc 62>;
>   		status = "disabled";
> 

How those reset are handled at driver side ?

regards
alex