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Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.5.1 Subject: Re: [PATCH v3 1/2] dt-bindings: watchdog: Add NXP Software Watchdog Timer To: Krzysztof Kozlowski , Daniel Lezcano , wim@linux-watchdog.org Cc: linux@roeck-us.net, linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, S32@nxp.com, ghennadi.procopciuc@nxp.com, thomas.fossati@linaro.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, devicetree@vger.kernel.org References: <20250407160318.936142-1-daniel.lezcano@linaro.org> <20250407160318.936142-2-daniel.lezcano@linaro.org> <094855d6-a99b-4ca5-bc8f-ab6faccfd332@kernel.org> <1e3d9e34-133d-451c-9ce6-6c974a781305@linaro.org> <981498bb-70d8-4304-9b53-065576ae8dc7@kernel.org> Content-Language: en-US From: Ghennadi Procopciuc In-Reply-To: <981498bb-70d8-4304-9b53-065576ae8dc7@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-ClientProxiedBy: AS4PR10CA0021.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:20b:5d8::9) To DU2PR04MB8582.eurprd04.prod.outlook.com (2603:10a6:10:2d9::24) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DU2PR04MB8582:EE_|DB8PR04MB7033:EE_ X-MS-Office365-Filtering-Correlation-Id: 84f71de0-9c8f-46f7-7dc0-08dd76885db7 X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|366016|376014|1800799024; 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The SoC does not change between boards. It >>> should be a fixed list - block receives that number of clocks or does >>> not... unless you meant that different instances of the block have >>> different clocks? >> >> The documentation describe the watchdog module with a clock for the >> counter, a clock for the register and the last one for the module. >> >> IIUC, these clocks are enabled when the system is powered-on or exits >> suspend. >> >> The driver does not have a control on them. >> >> The only usage of the clock is to retrieve the rate of the counter in >> order to compute the maximum timeout. So only one is needed. >> >> However Ghennadi would like to describe the register and the module >> clocks in case there is SoC variant where it is possible to have control >> on them [1] > > Different SoC means different compatible, so I don't get why this is > relevant here. Either these clocks inputs are there in the hardware or not. > >> >> The goal is to give the description the flexibility to describe just one >> because the other ones are not needed for this s32g2/3 platform. > > But bindings are not meant to be flexible but accurately describe the > hardware. If hardware always has these clock inputs, then they are > supposed to be always provided. > Indeed, as mentioned in my previous replies, the SWT hardware module has three clocks as inputs: counter, module, and register. > > Best regards, > Krzysztof > > -- Regards, Ghennadi