From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from relay1.mentorg.com ([192.94.38.131]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dK8zd-0008Dq-9S for barebox@lists.infradead.org; Sun, 11 Jun 2017 19:57:51 +0000 References: <20170609141622.21502-1-o.rempel@pengutronix.de> <20170611061919.jsbc7x67ut4segj5@pengutronix.de> From: Vladimir Zapolskiy Message-ID: <2432df7e-5d20-42c9-ddc0-044c2ca5ce2b@mentor.com> Date: Sun, 11 Jun 2017 22:57:18 +0300 MIME-Version: 1.0 In-Reply-To: <20170611061919.jsbc7x67ut4segj5@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [PATCH v1 1/1] gpio: of: provide option generic property for initial line states To: Oleksij Rempel , Rob Herring Cc: Mark Rutland , Alexandre Courbot , "linux-gpio@vger.kernel.org" , Linus Walleij , "linux-kernel@vger.kernel.org" , Oleksij Rempel , "devicetree@vger.kernel.org" , "kernel@pengutronix.de" , barebox@lists.infradead.org Hi Oleksij, On 06/11/2017 09:19 AM, Oleksij Rempel wrote: > Hi Rob, > > On Fri, Jun 09, 2017 at 10:41:30AM -0500, Rob Herring wrote: >> On Fri, Jun 9, 2017 at 9:16 AM, Oleksij Rempel wrote: >>> This property is needed for barebox or may be other bootloaders >>> to set proper gpio configuration as early as possible. >>> >>> This example is mainly based on "lines-initial-states" property >>> from this binding documentation: >>> Documentation/devicetree/bindings/gpio/gpio-pcf857x.txt >> >> Don't we have a binding for this already based on gpio-hogs. > > Markus Pargmann was working on this topic before and suddenly was not > able to finish it. that's fine, but the proposed extension is supposedly not wanted. > I found only some not finished discussions and no code or documentation > in linux kernel upstream. > > So far, I was able to find fallowing patches and discussions: > patch 23.08.2015, last comment 11.05.2017: > https://patchwork.kernel.org/patch/7096721/ > > patch 23.02.2016, last comment 09.03.2016: > https://patchwork.ozlabs.org/patch/586743/ > > Since there was objections about node-like design for gpio-initval, I > provided an array property, which is similar to initval properties already used > for different other device nodes. For example: > > Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt > qcom,ath10k-calibration-data > > Documentation/devicetree/bindings/gpio/gpio-pcf857x.txt > lines-initial-states It'd rather be better to fix the drivers and remove the properties from these found device tree binding descriptions. > > Please fixme if I miss something. Why is GPIO hogging mechanism not good enough for your purpose? -- With best wishes, Vladimir _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox