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Tue, 30 Sep 2025 12:09:04 -0700 (PDT) X-Received: by 2002:a17:90b:3a92:b0:334:29f0:a7e4 with SMTP id 98e67ed59e1d1-339a6f36cbamr634109a91.21.1759259343918; Tue, 30 Sep 2025 12:09:03 -0700 (PDT) Received: from [10.67.48.245] ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-339a6ebe5f2sm297610a91.11.2025.09.30.12.09.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 30 Sep 2025 12:09:02 -0700 (PDT) Message-ID: <1bb0f2f9-d3fa-42af-aa55-e9f0771ed5be@broadcom.com> Date: Tue, 30 Sep 2025 12:09:01 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/3] dt-bindings: hwlock: Adding brcmstb-hwspinlock support To: Conor Dooley , Kamal Dasu Cc: bcm-kernel-feedback-list@broadcom.com, andersson@kernel.org, baolin.wang@linux.alibaba.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-remoteproc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20250929200628.3699525-1-kamal.dasu@broadcom.com> <20250929200628.3699525-2-kamal.dasu@broadcom.com> <20250930-slapstick-volatile-60ad540f4b66@spud> Content-Language: en-US, fr-FR From: Florian Fainelli Autocrypt: addr=florian.fainelli@broadcom.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-DetectorID-Processed: b00c1d49-9d2e-4205-b15f-d015386d3d5e X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250930_120907_666974_1E5FB658 X-CRM114-Status: GOOD ( 17.31 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 9/30/25 12:03, Conor Dooley wrote: > On Mon, Sep 29, 2025 at 04:06:24PM -0400, Kamal Dasu wrote: >> Adding brcmstb-hwspinlock bindings. >> >> Signed-off-by: Kamal Dasu >> --- >> .../hwlock/brcm,brcmstb-hwspinlock.yaml | 36 +++++++++++++++++++ >> 1 file changed, 36 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/hwlock/brcm,brcmstb-hwspinlock.yaml >> >> diff --git a/Documentation/devicetree/bindings/hwlock/brcm,brcmstb-hwspinlock.yaml b/Documentation/devicetree/bindings/hwlock/brcm,brcmstb-hwspinlock.yaml >> new file mode 100644 >> index 000000000000..f45399b4fe0b >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/hwlock/brcm,brcmstb-hwspinlock.yaml >> @@ -0,0 +1,36 @@ >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/hwlock/brcm,brcmstb-hwspinlock.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Broadcom settop Hardware Spinlock >> + >> +maintainers: >> + - Kamal Dasu >> + >> +properties: >> + compatible: >> + const: brcm,brcmstb-hwspinlock > > Is "brcmstb" actually the name of a single platform? > Looking at the "brcmstb" pci binding, it looks like there's a whole load > of different devices there and none use "brcmstb": > - brcm,bcm2711-pcie # The Raspberry Pi 4 > - brcm,bcm2712-pcie # Raspberry Pi 5 > - brcm,bcm4908-pcie > - brcm,bcm7211-pcie # Broadcom STB version of RPi4 > - brcm,bcm7216-pcie # Broadcom 7216 Arm > - brcm,bcm7278-pcie # Broadcom 7278 Arm > - brcm,bcm7425-pcie # Broadcom 7425 MIPs > - brcm,bcm7435-pcie # Broadcom 7435 MIPs > - brcm,bcm7445-pcie # Broadcom 7445 Arm > - brcm,bcm7712-pcie # Broadcom STB sibling of Rpi 5 > > If "stb" means "set top box", it sounds like a catchall for disparate > devices, which isn't permitted. Unlike PCIe, the HW spinlock hardware has been stable across all Set-top box chips ever since it was added, which is why the catch all is IMHO adequate here. -- Florian