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Wed, 27 Jan 2021 13:08:01 +0000 Subject: Re: [PATCH] dt-bindings: rtc: pcf2127: update bindings To: Alexandre Belloni Cc: Alessandro Zummo , Rob Herring , linux-rtc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20201219013418.3474461-1-alexandre.belloni@bootlin.com> <20210126224835.GE1196852@piout.net> From: Rasmus Villemoes Message-ID: <0a8fd7f3-58c1-9e20-bcfa-9872b3dc3550@prevas.dk> Date: Wed, 27 Jan 2021 14:07:59 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 In-Reply-To: <20210126224835.GE1196852@piout.net> Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [5.186.115.188] X-ClientProxiedBy: AM7PR02CA0011.eurprd02.prod.outlook.com (2603:10a6:20b:100::21) To AM0PR10MB1874.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:208:3f::10) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [192.168.1.149] (5.186.115.188) by AM7PR02CA0011.eurprd02.prod.outlook.com (2603:10a6:20b:100::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3805.17 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: =?Windows-1252?Q?IHujTTLjNyouOvF9PTtR9XPKgbDL9P5rkCm09chb2hBEM8WLMzfAyRUi?= =?Windows-1252?Q?3KFzihFC1DIadUIQ47JsLuk4j1LIuQslMFMCEoxJ+diB9HwR3Hq2+uP5?= =?Windows-1252?Q?jyeswPHr8qxqMzHg7M3Fum28bClyJUYVd2ATJQuk2S0H9AuMK8xl0Odk?= =?Windows-1252?Q?tZHZZmVnaQiQ880aTGvhG9++91h/sMI/4MaIVz1sZNz8W/PAjvumDnGq?= =?Windows-1252?Q?DINYv1fW9Bs+wQqSShX9PXtbSybg7yPlzrX+B3/Kqg6qbS3t/UNYjdXc?= =?Windows-1252?Q?JbPftDIET6AzQdnTEX4ia37actY0V68tm5Vt7r1sQzDYrQkAbII5UNsW?= =?Windows-1252?Q?obnnCgawgbOzynEpJpQJdM6ebTcgvTNWYgGQvxEzUozbGh6njx/Ugalg?= =?Windows-1252?Q?ArvIvkd6xg7Ssg5GJS1RpuguJfH8iit0IXLNonv3qlRx2R8/ApidaRNJ?= =?Windows-1252?Q?0NP1VDlG29EnI9wN8XQd2FROWOZkwkWnaPYlw1BCTTSEGNwcaWqoyJYO?= =?Windows-1252?Q?6x1MXqHJGFModrzFCmiRKHwMEHMM9QYzpm5HkkV8AfGrRr80y99KRfqb?= =?Windows-1252?Q?DfeabthPEQWQAy8u8On0t2bNmBIIlDOAGMb62lHjHBtR4M87J+m0CiBX?= =?Windows-1252?Q?QiKoZkJ2pXdn6CA0wrD3VkSVEhCi5+kDRvufjUrjGrvCo0UgrWnyUbQz?= =?Windows-1252?Q?+yw86z5Khd8jRE8LoViTtAE+oFkouIZE8uEScM9HWrzlbSpHDoqTP4b1?= =?Windows-1252?Q?Svgx7i8RaZmjx761hR6cLtwJ5FBX/Qjwf7U/MbIn95BYXJfsyi5Het6W?= =?Windows-1252?Q?tUHuhKDLBOx4vQy/gRjnUeGwpmowJQ6wmJUIAoiBH9fa4dZW5G9+m/Ou?= =?Windows-1252?Q?yIp+3uQOX3kJ2YELoVqTDEaoxHZYJHROtbLh2E10P0fcozeh4+ooE/Zl?= =?Windows-1252?Q?SXVI7uCsLcYIxSXU0fpsIRoGQxyPk+HW2efIkXAI56oHgIP3cOzaFBFW?= =?Windows-1252?Q?/p+KlZKu6D7clweJelQ+Q8U2pM0UTMnzdEGunVPR7H63D0D87F8Y47BC?= =?Windows-1252?Q?0exNR29g1LGm7hyZuI+7ZFspvVW9wXq+rhd0BDyLKBFIjR8zN9J4sKuV?= =?Windows-1252?Q?iPak00BHLWAx6Pb0BbLCNJAG?= X-OriginatorOrg: prevas.dk X-MS-Exchange-CrossTenant-Network-Message-Id: 0012e624-fb95-48b5-4f6b-08d8c2c492f5 X-MS-Exchange-CrossTenant-AuthSource: AM0PR10MB1874.EURPRD10.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Jan 2021 13:08:01.1002 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: d350cf71-778d-4780-88f5-071a4cb1ed61 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: A9slSqowaqu1wU9f5Vz1dZK/tWHtXlS5XMbyp8Jz7ws8hQtf+8NGY2zB0etNicX++XipgGUqTSz/bvxlQmrW6QYuod7qJn9hKi+Y9h1drM4= X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR10MB2276 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 26/01/2021 23.48, Alexandre Belloni wrote: > On 21/12/2020 22:17:54+0100, Rasmus Villemoes wrote: >> On 19/12/2020 02.34, Alexandre Belloni wrote: >>> pcf2127, pcf2129 and pca2129 support start-year and reset-source. >>> >> >> No, the 2129 variant doesn't even have a reset output pin. Not sure if >> there's any way to reflect that, and it probably doesn't matter, since >> nobody's going to add the reset-source property to a 2129 node. But the >> commit message is a bit misleading. >> > > Actually no, the INT pin can be used as a reset, the pcf/pca2129 > can be used as a watchdog and so it may need the reset-source property. Unless I'm missing something, that would require some rather creative extra circuitry: The interrupt pin is kept low until the appropriate bit in the rtc is cleared, so if that is routed directly to a reset pin on the SOC, the SOC would be kept in reset indefinitely. Rasmus