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Tue, 17 Dec 2019 13:13:10 +0000 Received: from AM5PR1001MB0994.EURPRD10.PROD.OUTLOOK.COM ([fe80::ed23:3ca0:97ef:c868]) by AM5PR1001MB0994.EURPRD10.PROD.OUTLOOK.COM ([fe80::ed23:3ca0:97ef:c868%10]) with mapi id 15.20.2538.019; Tue, 17 Dec 2019 13:13:10 +0000 From: Adam Thomson To: Marco Felsch , Adam Thomson CC: Mark Brown , "devicetree@vger.kernel.org" , Support Opensource , "linux-aspeed@lists.ozlabs.org" , "bgolaszewski@baylibre.com" , "andrew@aj.id.au" , "linus.walleij@linaro.org" , "lgirdwood@gmail.com" , "linux-kernel@vger.kernel.org" , "linux-gpio@vger.kernel.org" , "robh+dt@kernel.org" , "joel@jms.id.au" , "kernel@pengutronix.de" , "lee.jones@linaro.org" , "linux-arm-kernel@lists.infradead.org" Subject: RE: [PATCH v3 3/6] dt-bindings: mfd: da9062: add regulator voltage selection documentation Thread-Topic: [PATCH v3 3/6] dt-bindings: mfd: da9062: add regulator voltage selection documentation Thread-Index: AQHVptoKIWnW5XGNx0qiesHaa7KQWaeqBMOAgAkpmQCAAfp+EIAAFOMAgAGB2oCAAAM8gIAACD8AgAXEVoCAAH+D4IABFEIAgAANuACAAC0nAIAACzSQ Date: Tue, 17 Dec 2019 13:13:10 +0000 Message-ID: References: <20191210094144.mxximpuouchy3fqu@pengutronix.de> <20191211170918.q7kqkd4lrwwp7jl3@pengutronix.de> <20191212161019.GF4310@sirena.org.uk> <20191212162152.5uu3feacduetysq7@pengutronix.de> <20191212165124.GJ4310@sirena.org.uk> <20191216085525.csr2aglm5md4vtsw@pengutronix.de> <20191217090034.GD31182@pengutronix.de> <20191217123116.GB29666@pengutronix.de> In-Reply-To: <20191217123116.GB29666@pengutronix.de> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [165.225.80.228] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: d43dab66-c529-4db0-d833-08d782f2ddb2 x-ms-traffictypediagnostic: AM5PR1001MB1186: x-ms-exchange-sharedmailbox-routingagent-processed: True x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:9508; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: diasemi.com X-MS-Exchange-CrossTenant-Network-Message-Id: d43dab66-c529-4db0-d833-08d782f2ddb2 X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Dec 2019 13:13:10.7967 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 511e3c0e-ee96-486e-a2ec-e272ffa37b7c X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: DWexB0wfG8g6nyBWjsshAbVVeSk8oK9GHXnbcvoYvBkmbiLnKVdWEpSJc6zix7/7DQGhxahjFUZ3bSRovIam4b8oTqc9wDau0WEU9ydu46g= X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM5PR1001MB1186 Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org On 17 December 2019 12:31, Marco Felsch wrote: > On 19-12-17 09:53, Adam Thomson wrote: > > On 17 December 2019 09:01, Marco Felsch wrote: > > > > > > > The enabel control signal is always available, please check [1] t= able > > > > > 63. There is a mux in front of the enable pin so: > > > > > > > > > > +------------- > > > > > Seq. |\ | Regulator > > > > > GPI1 | \ | > > > > > GPI2 | | -- > Enable > > > > > GPI3 | / | > > > > > |/ . > > > > > . > > > > > . > > > > > > > > > > Adam please correct me if this is wrong. > > > > > > > > Yes the register can always be configured regardless of the associa= ted pin > > > > configuration, but if say GPIO1 was configured as a GPO but a regul= ator was > > > > configured to use GPIO1 as its GPI control mechanism, the output si= gnal > from > > > > GPIO1 would be ignored, the sequencer control would not have any ef= fect > and > > > > you're simply left with manual I2C control. Really we shouldn't be = getting > into > > > > that situation though. If a GPIO is to be used as a regulator contr= ol signal > > > > then it should be marked as such and I don't think we should be abl= e to use > that > > > > pin for anything other than regulator control. > > > > > > I see, so we have to guarantee that the requested gpio is configured = as > > > input. This can be done by: > > > > This is one of the reasons I thought this was better suited to being do= ne in the > > pinctrl/pinmux side. If you configure the GPIO as for regulator control= then > > the code can automatically configure the GPIO for input. That doesn't t= hen > need > > to be in the regulator driver. >=20 > I still don't prefer that way.. pls check my arguments I already made > and I don't wanna repeat it again. Yes, I read your arguments but still can't agree :) From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1ABB1C43603 for ; Tue, 17 Dec 2019 13:13:34 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D1E35206EC for ; Tue, 17 Dec 2019 13:13:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="bPgLntv/"; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 17 December 2019 12:31, Marco Felsch wrote: > On 19-12-17 09:53, Adam Thomson wrote: > > On 17 December 2019 09:01, Marco Felsch wrote: > > > > > > > The enabel control signal is always available, please check [1] table > > > > > 63. There is a mux in front of the enable pin so: > > > > > > > > > > +------------- > > > > > Seq. |\ | Regulator > > > > > GPI1 | \ | > > > > > GPI2 | | -- > Enable > > > > > GPI3 | / | > > > > > |/ . > > > > > . > > > > > . > > > > > > > > > > Adam please correct me if this is wrong. > > > > > > > > Yes the register can always be configured regardless of the associated pin > > > > configuration, but if say GPIO1 was configured as a GPO but a regulator was > > > > configured to use GPIO1 as its GPI control mechanism, the output signal > from > > > > GPIO1 would be ignored, the sequencer control would not have any effect > and > > > > you're simply left with manual I2C control. Really we shouldn't be getting > into > > > > that situation though. If a GPIO is to be used as a regulator control signal > > > > then it should be marked as such and I don't think we should be able to use > that > > > > pin for anything other than regulator control. > > > > > > I see, so we have to guarantee that the requested gpio is configured as > > > input. This can be done by: > > > > This is one of the reasons I thought this was better suited to being done in the > > pinctrl/pinmux side. If you configure the GPIO as for regulator control then > > the code can automatically configure the GPIO for input. That doesn't then > need > > to be in the regulator driver. > > I still don't prefer that way.. pls check my arguments I already made > and I don't wanna repeat it again. Yes, I read your arguments but still can't agree :) _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel