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Tue, 6 Oct 2026 18:04:02 +0200 Message-ID: <9bdf2258-9310-48ee-b3c5-226ce5fb76e1@foss.st.com> Date: Tue, 6 Oct 2026 18:04:01 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/3] dt-bindings: iio: adc: add bindings for stm32 mdf filter To: Krzysztof Kozlowski CC: Jonathan Cameron , David Lechner , =?UTF-8?Q?Nuno_S=C3=A1?= , "Andy Shevchenko" , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley , "Maxime Coquelin" , Alexandre Torgue , , , , , References: <20261001145702.2628429-1-olivier.moysan@foss.st.com> <20261001145702.2628429-2-olivier.moysan@foss.st.com> <20261002-observant-gleaming-koel-4dc04c@quoll> Content-Language: en-US From: Olivier MOYSAN In-Reply-To: <20261002-observant-gleaming-koel-4dc04c@quoll> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: STKCAS1NODE1.st.com (10.75.128.134) To STKDAG1NODE2.st.com (10.75.128.133) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: WA1PEPF000099CF:EE_|DU0PR10MB6932:EE_ X-MS-Office365-Filtering-Correlation-Id: e2ac9b37-a188-4d79-f9e8-08df23c37187 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|23010399003|1800799024|36860700016|376014|82310400026|10067099003|11063799006|3023799007|56012099006|4143699003|18002099003|22082099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 2MkjSoMONRlB5zmisfMLxzub6ktNFEMlHhHUxUL5pSmQr+rPsQ/pXGtYu11Ei3c3LX58cX4/QP1T2+rryUibfY+F4XlRtThwj+Go2bJhy54LXLsJgqVdABbZYJxsuTyu3bGMhKKv4XrBCInxw59goDt9EVOJ2SIo4Y2BK5qmnz9SlUtKpIQcANLDVAEQtUopGmusthL6pwuNN+GSfZNMLLll7Z1jRKwBsSQMiLLm+TlOcwdzhcgdKj6E0wvOkOe020Hm9JQaNGuWWr+l82361T5eoI+xwCmQ22J4eiIDJzX3gYiXCD7RJowx+jg8DEcujFNR/7bip6TdNZv6bphEkNPwNZKWdQ1Wynhx3OQoFMecn2BRrpB0riv/nvddMXMDglntWR88RR5pADcgh1V4qtRddFWz2eHbH3ihD/UWNZLw2GoKCoiQuH/hIr8+mI6Q X-OriginatorOrg: foss.st.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Oct 2026 16:04:03.9203 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e2ac9b37-a188-4d79-f9e8-08df23c37187 X-MS-Exchange-CrossTenant-Id: 75e027c9-20d5-47d5-b82f-77d7cd041e8f X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=75e027c9-20d5-47d5-b82f-77d7cd041e8f;Ip=[164.130.1.60];Helo=[smtpO365.st.com] X-MS-Exchange-CrossTenant-AuthSource: WA1PEPF000099CF.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU0PR10MB6932 Hi Krzysztof, On 10/2/26 11:34, Krzysztof Kozlowski wrote: > On Thu, Oct 01, 2026 at 04:56:45PM +0200, Olivier Moysan wrote: >> + clock-output-names: >> + description: | >> + CCK0 and CCK1 are optional output clocks, which share the same clock frequency, >> + but can be gated independently to save power. >> + minItems: 1 >> + maxItems: 2 >> + oneOf: >> + - items: >> + - const: cck0 >> + - items: >> + - const: cck1 >> + - items: >> + - const: cck0 >> + - const: cck1 > > Use simpler notation: > minItems: 1 > items: > - enum > - const > >> + >> + clock-frequency: >> + description: | > > Drop | when not needed. > >> + Common clock frequency (Hz) for CCK0 and CCK1 output clocks. >> + The frequency must be a multiple of the "ker_ck" clock frequency. >> + maximum: 25000000 > > So here is the clock-frequency. No, these are output clocks as written > above, so consumer sets it, not the provider. Or use existing assigned > properties. This is even mentioned on DTS101 slides, really... > We expect the clock frequency to be defined statically for a given board So, using assigned-clocks properties looks the right choice. What bothers me about this solution, is that the frequency will be defined in each consumer, whereas a single rate can be defined for the provider. This may looks a bit strange, but I will implement it this way if there is no other mean to set the provider frequency. > Best regards, > Krzysztof > Best regards Olivier