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Thu, 10 Apr 2025 11:44:42 -0700 (PDT) Received: from [10.69.70.230] ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-2d0969589basm776184fac.19.2025.04.10.11.44.41 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 10 Apr 2025 11:44:42 -0700 (PDT) Message-ID: Date: Thu, 10 Apr 2025 11:44:40 -0700 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/2] dt-bindings: mailbox: Add support for bcm74110 To: Krzysztof Kozlowski , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: florian.fainelli@broadcom.com, conor+dt@kernel.org, krzk+dt@kernel.org, robh@kernel.org, jassisinghbrar@gmail.com, bcm-kernel-feedback-list@broadcom.com References: <20250404222058.396134-1-justin.chen@broadcom.com> <20250404222058.396134-2-justin.chen@broadcom.com> <9088acd0-4650-4b10-88f9-6b6c0b1f9978@broadcom.com> <8abcf2bf-77cb-4380-bdc4-95c3796a96f0@kernel.org> Content-Language: en-US From: Justin Chen In-Reply-To: <8abcf2bf-77cb-4380-bdc4-95c3796a96f0@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 4/7/25 11:05 PM, Krzysztof Kozlowski wrote: > On 07/04/2025 22:57, Justin Chen wrote: > > >> from v2 of my patch was copied from said generated DTS. >> >> Apologies as I navigate through the different yaml keywords here. The HW >> isn't changing, I am just struggling with representing the HW using the >> different keywords. And the different implications of using said keywords. >> >> Here is what I have for v4. >> items: >> - description: RX doorbell and watermark interrupts >> - description: TX doorbell and watermark interrupts >> + description: >> + RX interrupts are required to notify the host of pending messages. TX >> + interrupts are optional. The TX doorbell interrupt is not used by the >> + host, but watermark interrupts may be used to notify a host >> waiting on >> + a full out queue. > What does it mean optional? Board decides on SoC connections? Given SoC > is fixed isn't it? > Maybe I misunderstand optional here. We have optional from the SoC perspective and optional from a driver perspective. I was thinking if we have a HW feature that the software may choose to use, it is considered optional. If that is not the correct understanding, I can make adjustments. I will remove minItems, which from understanding, means both IRQs are required. Thanks, Justin > Best regards, > Krzysztof