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Thu, 5 Nov 2026 11:31:08 +0100 Message-ID: <6103ddea-9ef4-4d02-b41e-ed0b4701250e@foss.st.com> Date: Thu, 5 Nov 2026 11:31:07 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 2/3] dt-bindings: arm: stm32: allow TAMP nvram child node for syscon To: Krzysztof Kozlowski CC: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maxime Coquelin , Alexandre Torgue , Christophe Roullier , Srinivas Kandagatla , Simeon Marijon , , , , References: <20261016-upstream_nvram_reworked-v3-0-f65908490cf7@foss.st.com> <20261016-upstream_nvram_reworked-v3-2-f65908490cf7@foss.st.com> <20261017-valiant-exotic-heron-c0b6e8@quoll> Content-Language: en-US From: Patrice CHOTARD In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: ENXCAS1NODE2.st.com (10.75.128.138) To STKDAG1NODE1.st.com (10.75.128.132) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MAD0EPF000008AE:EE_|DU0PR10MB5267:EE_ X-MS-Office365-Filtering-Correlation-Id: 35428e10-03bb-4a06-6d74-08df3b27f015 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|23010399003|1800799024|36860700016|82310400026|11063799006|4143699003|56012099006|261021121427099003|261022075727099003|261022105027099003|261009223027099003|261102123227099003|261026140227099003|261026121527099003|261028144727099003|10067099003|18002099003|22082099003|6133799003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: P8EB97CFnoAS/22Vbc6dVoRQLTlN73AerLYD+PBob4w++52CMgiUnW5T/2Ljoj/d3KNynzaYEdBwLPhhLpnwU35koNLVhdqhEjKva2lhh7XfzQSzh2m9kPzu3Ql16prltewkL2Pu+acOYXhMz/YXDz94s1+wUgJPwt6ghCFw1tnjGJ7ecDwxHoaIFY+hkhoOmKcU5K1SzujeZTgS0AWqEXdh8XBJVAhS0AYvEVALVpHGFm5JR80jINeWpbtt20ea+LJC0Isu/TzMvFiLD2G7Xs94e7ohXrUmZ6hB4U7Z6ljJ8o0wEJVy3kJKbDr02nB+z5SjRslViE9lQVBYjBCSC5Ggtq21qlsLk22ZeqttG9hTgdxWfFXQSWY7gvfKXc53gxujaxuhZ/dS5L1rVvOUrJsc0hG1FtO4d47wtZOLq/BdMw4G7i7RmLCMSHxM4AR+ X-OriginatorOrg: foss.st.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Nov 2026 10:31:22.6450 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 35428e10-03bb-4a06-6d74-08df3b27f015 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: MAD0EPF000008AE.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU0PR10MB5267 On 11/5/26 09:17, Krzysztof Kozlowski wrote: > On 04/11/2026 14:43, Patrice CHOTARD wrote: >> >> >> On 10/17/26 19:52, Krzysztof Kozlowski wrote: >>> On Fri, Oct 16, 2026 at 05:26:04PM +0200, Patrice Chotard wrote: >>>> The STM32 TAMP node (compatible "st,stm32-tamp", "syscon", "simple-mfd") >>>> exposes its backup registers through an nvram child node described by >>>> nvmem/st,stm32-tamp-nvram.yaml. That requires the TAMP node to carry >>>> "#address-cells", "#size-cells", "ranges" and an "nvram@..." child. >>>> >>>> st,stm32-syscon.yaml uses "additionalProperties: false" and only allowed >>>> reg/clocks/#clock-cells, so wiring the nvram provider into the DTSI made >>>> "make dtbs_check" fail on every STM32MP TAMP node: >>>> >>>> tamp@5c00a000 (st,stm32-tamp): '#address-cells', '#size-cells', >>>> 'nvram@5c00a100', 'ranges' do not match any of the regexes: >>>> '^pinctrl-[0-9]+$' >>> >>> There are no children of tamp@5c00a000 in >>> arch/arm/boot/dts/st/stm32mp151.dtsi. How is it possible to reproduce >>> this warning? >>> >>> Are you using some other patches bugs as a reason of change in bindings? >> >> Hi Krzysztof >> >> yes, in this patch [1] arch/arm/boot/dts/st/stm32mp151.dtsi is updated >> that's why bindings need this change. > > You cannot use future code as a bug being fixed. Ok, so i will merge this series with https://patchwork.kernel.org/series/1176665/ Thanks Patrice > > > Best regards, > Krzysztof