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Thu, 2 Jul 2020 14:46:11 +0000 Subject: Re: [PATCH] spi: spidev: Add compatible for external SPI ports on Kontron boards To: Mark Brown Cc: linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org References: <20200702141846.7752-1-frieder.schrempf@kontron.de> <20200702142511.GF4483@sirena.org.uk> From: Frieder Schrempf Message-ID: <24ec4eed-de01-28df-ee1f-f7bcfc80051a@kontron.de> Date: Thu, 2 Jul 2020 16:46:09 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 In-Reply-To: <20200702142511.GF4483@sirena.org.uk> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-ClientProxiedBy: AM0PR02CA0096.eurprd02.prod.outlook.com (2603:10a6:208:154::37) To DB7PR10MB2490.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:10:50::12) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [192.168.10.17] (46.142.79.231) by AM0PR02CA0096.eurprd02.prod.outlook.com (2603:10a6:208:154::37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3153.23 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: udRDO0mphqLqc5cxp8u63Qg5XTpiZ2SaXrhl7wSt/YlFdQhVUE54Vk40aYcQOYyzX8HqpWAEjiGmNOUlLHi6+PzQE/lBKdPwBuP451g+/S7wbfKLB7YOZerNBWx1Lpc+kVaddYUpJ03FLd0dZO27OoKdmjpwhPB08rGbIS4cpPkm8m7/u1FG77naVXc9h2+hDrrwUbUk9TWYOYHIyxnW2Mgo0/Wodo3afBYvKuh9suZZa/et9CaRg+7cYrG7hRQj5XT2sBz4MDqQsTqhayGKp0MQcg2VdD1SBxsGznYEoMMFiffUlyp6ryCqfo9rjN9SB09YK3W8X9MhXIhkAEcAdwcVkgzM+q1/8mzI8QweAPQcZl1cFlFKgV4JtsjG+Z2RsYZbPhLWgPlzDwxCtMVKjdDxCVqLZJQpYF2KXzThlptAdjxmh6PuNP+tlf7nX4PMZAhgIIeLlI20nUL+ZyTNM8/Z/+mYEaUPduUi7weoR1c= X-OriginatorOrg: kontron.de X-MS-Exchange-CrossTenant-Network-Message-Id: 4935247c-4c94-4fd2-3f0b-08d81e96a922 X-MS-Exchange-CrossTenant-AuthSource: DB7PR10MB2490.EURPRD10.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jul 2020 14:46:10.6545 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 8c9d3c97-3fd9-41c8-a2b1-646f3942daf1 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: jBECmXvnd7s7CIEIxJyQtYPBGSE40h3czSGSfRNKfx4YXQGbav4uC1Y2ravRVcdi38tQ+C4+W4TrCnMiuPtxdZA2+oN3VnoJ1tpydvMS+wE= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB8PR10MB3276 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02.07.20 16:25, Mark Brown wrote: > On Thu, Jul 02, 2020 at 04:18:46PM +0200, Schrempf Frieder wrote: >> From: Frieder Schrempf >> >> Allow external SPI ports on Kontron boards to use the spidev driver. > > I'd have expected this to require loading a DT overlay for whatever's > attached? My intention is to use the spidev driver in the default board DT for an interface that is routed to an extension connector and has no dedicated slave device attached onboard. So users can attach sensors, etc. with userspace drivers without touching the kernel or DT. See https://patchwork.kernel.org/patch/11639075/ for the boards DT.