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Thu, 6 May 2021 06:43:20 +0000 Subject: Re: [PATCH V2 08/13] dt-bindings: imx: gpcv2: add support for optional resets To: "Peng Fan (OSS)" , robh+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de Cc: kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, p.zabel@pengutronix.de, l.stach@pengutronix.de, krzk@kernel.org, agx@sigxcpu.org, marex@denx.de, andrew.smirnov@gmail.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, ping.bai@nxp.com, aford173@gmail.com, abel.vesa@nxp.com, Peng Fan References: <20210506010440.7016-1-peng.fan@oss.nxp.com> <20210506010440.7016-9-peng.fan@oss.nxp.com> From: Frieder Schrempf Message-ID: Date: Thu, 6 May 2021 08:43:17 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 In-Reply-To: <20210506010440.7016-9-peng.fan@oss.nxp.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [89.244.180.42] X-ClientProxiedBy: AM7PR03CA0030.eurprd03.prod.outlook.com (2603:10a6:20b:130::40) To AM0PR10MB2963.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:208:157::14) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [192.168.10.27] (89.244.180.42) by AM7PR03CA0030.eurprd03.prod.outlook.com (2603:10a6:20b:130::40) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4108.25 via Frontend Transport; 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Add an optional resets property to allow > the GPC driver to trigger those resets explicitly. > > The resets belong to devices located inside the power domain, > which need to be held in reset across the power-up sequence. So we > have no means to specify what each reset is in a generic power-domain > binding. Same situation as with the clocks in this binding actually. My understanding was that Rob wanted this explanation to be contained in the binding docs itself and not only in the commit message, but I might be wrong. > > Signed-off-by: Lucas Stach > Signed-off-by: Peng Fan > --- > Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml b/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml > index a96e6dbf1858..4330c73a2c30 100644 > --- a/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml > +++ b/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml > @@ -66,6 +66,13 @@ properties: > > power-supply: true > > + resets: > + description: | > + A number of phandles to resets that need to be asserted during > + power-up sequencing of the domain. > + minItems: 1 > + maxItems: 4 > + > required: > - '#power-domain-cells' > - reg >