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Thu, 15 Aug 2019 21:23:43 +0000 (UTC) Subject: Re: [PATCH] uio: uio_pdrv_genirq: Make UIO name controllable via DT node property To: Greg KH Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20190811110213.5537-1-daniel@zonque.org> <20190815205618.GA11877@kroah.com> From: Daniel Mack Openpgp: preference=signencrypt Autocrypt: addr=daniel@zonque.org; prefer-encrypt=mutual; keydata= mQINBFJqOksBEADTAqNa32jIMmtknN+kbl2QCQ+O8onAyfBXW2+ULByC+54ELTsKnuAChxYB pimYqixmqbD9f7PrnU4/zAEMr8yJaTLp1uFHN1Qivx268wVlFBP+rnhULsiwcsJVWWIeeUxR Fk6V7K8RQMGsk0jwTfF+zHfKc7qPIMVh7peZalyIn6giqcQKM6SNrsCjLKlIachR/SstmMOG 5sXkykOh0pqgqj0aDzs2H9UYJyuA1OTkrN8AwA6SgwbZxRThdgbFKY7WaBPALcGK+89OCtwE UV6SIF9cUd0EvaqyawJbjPGRFJ4KckAfZYRdRWtd+2njeC9hehfB/mQVDBzHtquSO6HPKqt/ 4hDtQDXv4qAyBNDi50uXmORKxSJkcFlBGAl0RGOCcegilCfjQHX6XHPXbAfuoJGYyt1i4Iuy Doz5KVxm0SPftRNfg5eVKm3akIEdR1HI315866/QInkinngZ8BItVj+B89pwcbMcaG4cFcB8 4sWOLDPiGob2oaMe88y3whxVW8a+PAyfvesLJFeLGfjtBOO1sGtUa/qudcqS74oyfqVmRz+V sxEQ9xW9MZsZuvZYNT9nHGAP4ekpAs/ZGYX2sraU8394EDhKb2tkQz952D7BH2/xrGleOar2 BnkuCR/M9iS2BPNTYZEYQfIdj7NI3Qbn4vKtM3IMnPWRFS7ZuQARAQABtB9EYW5pZWwgTWFj ayA8ZGFuaWVsQHpvbnF1ZS5vcmc+iQI7BBMBAgAlAhsDBgsJCAcDAgYVCAIJCgsEFgIDAQIe AQIXgAIZAQUCWom+IAAKCRC6YTEa/GNUJDAiD/42ybmeJ4r9yEmdgJraRiDDdcMTPuDwRICQ oxiMBph+eBjdveCaG4K2IjbUouhXKXVAiugSbyHWL9vcBzcPIy+mcxCSf0BC6BCzhR60ontC GTZAGNXVL98RhlnDGtFBPKZfXy1V8LaAe9puyBysv3/RAanc85B6Rv0bMRh/1nKf2rQWHmM5 bnPrxSDh2X3CJEMCCtoTo5jZ3YnkZae7DmVL/0JWGrCPfTXrBsJi+EVNFy2D57DdAWFbcl8C eiQrwBPfVomQTQ0EgLl8gC2V1UxjgdBy3Vpf0MIjlNvE0Lv3MPCwV3X33+07wtpGK7DzJY8N MI+Woe/Qp49QenYL2Xx/R7frfdIG4HAnUaeIGR+1PGqbX9Kc3htKIP9DV3j9xLHkIfhI+2HH HEptLuoewPS2egdtJo4LNWM7WMquJcve/dMae2MWlLfPQiTTy8RUPd8PtTSxrmUAYwGzAPYQ JATxoi/g02BtwsxNxp9gN9tlPEdP+0O2vptN3leADrt6nW495TlbuYwJaz4VPGrkziKpV9HU KgGaRwr0/RpONO4TFk6wTIa2Tak/y8s7rfnr+t7OVp7gG7/CKozRZMv/YijQhelMk4D6E6UI oE5ZQ7bkBRZj0V3fkFl7FM1wzk1WJ2jUhw3wNIy5vQ36rTCoeLDEVpZO1MeVh09FbEDJkBu5 SrkCDQRSajpLARAA4lEVCaGHcCIhxLSxvPjgzj7BzpmPaJbMd92DeKtUcB2vHhhuqa0WQSGO jKlaQdTqowVIQ974snsmNNwF5w8mss46T1X+2WS7YKAyn4dDScukY54thYthOkOn4DbKV6S0 4IV30DL9/5iQHszl9FNY7MIdvwMM7ozxJYrUv+wKcfOBh4zbFisXCu+jPobyKe+5XurJXXZ9 2aSDkrKPT9zKSUz+fElb/mL7o4NCeQcK5yvKMgj1MqT7O+V5F3gM/bh0srNMxL8w27pgYm6e O99M3vNkRd+qyXOsc6dLqgSkxsoRuWVX8vJROi6gMdn7O/AZ85t5paFIj5rqRJyYTPDRKN2Z ayT+ZPlF14b6LaodbPbZXEwiPfGhUwuVSwUjKHjcJMLLi5vq62fq1X/cCi2midjFY6nQsSn9 Mldx6v7JJWW8hvlnw+smduhg0UCfwx0KCI9wSPE2MUbm6KKS4DwAPbi0WCeUcNzRUxTCAs6c a9EOH0qsEAH7vwLzCf5lFiTMolhDJLZrsYvS1MBN4FxsyC7MMW2j4rMk2v0STORRGNY5oxrn LAO52ns135O2A22Mnhqo+ssjhJQAvEr5f13/qUEP0w79Qg9BUE5yfwJsalhgVfEvKabrNDKu a7UqNZ5lJZO2TdCi7OYl34WEnS3e+3qY2oHSL5n4kLiT/v+/1U0AEQEAAYkCHwQYAQIACQIb DAUCV6sTCAAKCRC6YTEa/GNUJHw5D/4luZ1GFCPW8kqkmpBUFTVjZqOhhT+z0KnrBsisJSOH VR8MraCDWHo/u4PTgqwF38PvyeZ4jXTXv+5FYjN6sJ8ydnfsUOORoM/KUafXmAug3zafqFd9 CzELh8FutTRYncoJMmL2HAbHqQRZlcFj6mKYFKqN+pA3tPbl3QpDORxMzeSn0J4sQeaVkIw2 inqYKTW+7vMi9/toMBNPEJPgSG77opYcEVjtDCPeAermjt6Ypqb0NyvE7zHLXpw3zcIA+Zge 0VIIW5bXco8520SJfDCKlS3IJlxOGgLVbcWwMayhO8cw8kWHg4KqjWQPvfsuhALGUidfhC3h L/o+2sOPZXT09OIR4arkuWH7xPF2X+L13TJ52OqVt0ERX5D9/7AwTArpCK6Vr3hybscBwFdW DduIc9DAFQ4AzQuURhAP2wHBmayrVDdtwtZVxyO6b6G2brkdbCpFEzeg66Q1jp/R5GXgNMBi qkqS7nnXncMTx6jmMAxHQ3XoXzPIZmBvWmD9Z0gCyTU6lSFSiGLO7KegnaRgBlJX/kmZ7Xfu YbiKOFbQ6XDctinOnZW5HFQiNQ+qkkx/CEcC1tXPY+JMjmA43KfCtwCjZbmi/bmb1JHJNZ9O H/iGc7WLxMDmqqBiZcQMQ0fcvv9Pj/NM8qNTDPtWeMwHV1p5s/U9nT8E35Hvbwx1Zg== Message-ID: <366c9fd3-c497-f0e7-e7b4-c668f4edcb84@zonque.org> Date: Thu, 15 Aug 2019 23:27:43 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190815205618.GA11877@kroah.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 15/8/2019 10:56 PM, Greg KH wrote: > On Sun, Aug 11, 2019 at 01:02:13PM +0200, Daniel Mack wrote: >> When probed via DT, the uio_pdrv_genirq driver currently uses the name >> of the node and exposes that as name of the UIO device to userspace. >> >> This doesn't work for systems where multiple nodes with the same name >> (but different unit addresses) are present, or for systems where the >> node names are auto-generated by a third-party tool. >> >> This patch adds the possibility to read the UIO name from the optional >> "linux,uio-name" property. > > Does that need to be documented anywhere? This driver does not have a match table and is special in other ways too, which is why I believe it isn't documented in Documentation/devicetree/bindings. I'll cook up a patch to describe how the probing works right now, and also add a word on the newly introduced property. Thanks, Daniel