From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oleksij Rempel Subject: Re: [PATCH V2 1/5] dt-bindings: fsl: scu: add scu power key binding Date: Tue, 3 Sep 2019 08:32:15 +0200 Message-ID: <21d2e400-976a-35c3-6875-4cc0c476fdf2@pengutronix.de> References: <1567519424-32271-1-git-send-email-Anson.Huang@nxp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1567519424-32271-1-git-send-email-Anson.Huang@nxp.com> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org To: Anson Huang , robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, catalin.marinas@arm.com, will@kernel.org, dmitry.torokhov@gmail.com, aisheng.dong@nxp.com, ulf.hansson@linaro.org, fugang.duan@nxp.com, peng.fan@nxp.com, daniel.baluta@nxp.com, leonard.crestez@nxp.com, mripard@kernel.org, olof@lixom.net, arnd@arndb.de, jagan@amarulasolutions.com, bjorn.andersson@linaro.org, dinguyen@kernel.org, marcin.juszkiewicz@linaro.org, stefan@agner.ch, gregkh@linuxfoundation.org, andriy.shevchenko@linux.intel.com, yuehaibing@huawei.com, tglx@linutronix.de, ronald@innovation.ch, m.felsch@pengutronix.de, ping.bai@nxp.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lis Cc: Linux-imx@nxp.com List-Id: linux-input@vger.kernel.org On 03.09.19 16:03, Anson Huang wrote: > NXP i.MX8QXP is an ARMv8 SoC with a Cortex-M4 core inside as > system controller, the system controller is in charge of system > power, clock and power key event etc. management, Linux kernel > has to communicate with system controller via MU (message unit) > IPC to get power key event, add binding doc for i.MX system > controller power key driver. > > Signed-off-by: Anson Huang > --- > Changes since V1: > - remove "wakeup-source" property, as it is NOT needed for SCU interrupt; > - remove "status" in example. > --- > .../devicetree/bindings/arm/freescale/fsl,scu.txt | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt > index c149fad..f93e2e4 100644 > --- a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt > +++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt > @@ -157,6 +157,15 @@ Required properties: > Optional properties: > - timeout-sec: contains the watchdog timeout in seconds. > > +Power key bindings based on SCU Message Protocol > +------------------------------------------------------------ > + > +Required properties: > +- compatible: should be: > + "fsl,imx8qxp-sc-pwrkey" > + followed by "fsl,imx-sc-pwrkey"; > +- linux,keycodes: See Documentation/devicetree/bindings/input/keys.txt linux,keycodes is required parameter. So, this kay cab be anything. Why the compatible is called pwrkey? Probably it is better to call it "*-sc-key" > + > Example (imx8qxp): > ------------- > aliases { > @@ -220,6 +229,11 @@ firmware { > compatible = "fsl,imx8qxp-sc-rtc"; > }; > > + scu_pwrkey: scu-pwrkey { > + compatible = "fsl,imx8qxp-sc-pwrkey", "fsl,imx-sc-pwrkey"; > + linux,keycode = ; > + }; > + > watchdog { > compatible = "fsl,imx8qxp-sc-wdt", "fsl,imx-sc-wdt"; > timeout-sec = <60>; > Kind regards, Oleksij Rempel -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |