Best Regards! Anson Huang
> -----Original Message----- > From: Aisheng Dong > Sent: 2019年2月20日 11:27 > To: Anson Huang <anson.hu...@nxp.com>; robh...@kernel.org; > mark.rutl...@arm.com; shawn...@kernel.org; s.ha...@pengutronix.de; > ker...@pengutronix.de; feste...@gmail.com; catalin.mari...@arm.com; > will.dea...@arm.com; rui.zh...@intel.com; edubez...@gmail.com; > daniel.lezc...@linaro.org; ulf.hans...@linaro.org; Daniel Baluta > <daniel.bal...@nxp.com>; horms+rene...@verge.net.au; Andy Gross > <andy.gr...@linaro.org>; he...@sntech.de; a...@arndb.de; > maxime.rip...@bootlin.com; ja...@amarulasolutions.com; > bjorn.anders...@linaro.org; enric.balle...@collabora.com; > marc.w.gonza...@free.fr; o...@lixom.net; devicet...@vger.kernel.org; > linux-kernel@vger.kernel.org; linux-arm-ker...@lists.infradead.org; linux- > p...@vger.kernel.org > Cc: dl-linux-imx <linux-...@nxp.com> > Subject: RE: [PATCH V6 1/4] dt-bindings: fsl: scu: add thermal binding > > > From: Anson Huang > > Sent: Thursday, February 7, 2019 5:53 PM > [...] > > > > 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 thermal sensors etc. management, Linux kernel has to communicate > > with system controller via MU (message unit) IPC to get temperature > > from thermal sensors, this patch adds binding doc for i.MX system > controller thermal driver. > > > > Signed-off-by: Anson Huang <anson.hu...@nxp.com> > > Reviewed-by: Rob Herring <r...@kernel.org> > > --- > > ChangeLog since V5: > > - add "imx,sensor-resource-id" in each thermal zone to pass resource > > ID for thermal driver. > > --- > > .../devicetree/bindings/arm/freescale/fsl,scu.txt | 20 > > ++++++++++++++++++++ > > 1 file changed, 20 insertions(+) > > > > diff --git > > a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt > > b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt > > index 72d481c..4b79751 100644 > > --- a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt > > +++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt > > @@ -122,6 +122,20 @@ RTC bindings based on SCU Message Protocol > > Required properties: > > - compatible: should be "fsl,imx8qxp-sc-rtc"; > > > > +Thermal bindings based on SCU Message Protocol > > +------------------------------------------------------------ > > + > > +Required properties: > > +- compatible : Must be "fsl,imx8qxp-sc-thermal"; > > +- tsens-num : Total number of thermal sensors supported; > > +- #thermal-sensor-cells : Should be 1. See > > + > Documentation/devicetree/bindings/thermal/thermal.txt > > + for a description. > > +- imx,sensor-resource-id : This property should be defined in each > > +thermal > > zone > > + of thermal-zones node, it passes each thermal > zone's > > + resource id for thermal driver to get temperature > via > > + SCU IPC. > > This is missing in the example? There are two parts of thermal dts, one is the tsens which are different on each platform. The other are common thermal-zone definitions, these are covered by thermal binding doc. The property is added by us for our platforms, if want to put it in example, I need to copy Hope piece of common thermal-zone node. > > BTW, is this SCU function likely platform dependent? > If not, you probably could add a fallback compatible such as "fsl,scu-rtc" For now, the SCU API we used are platform independent, the ONLY parameter depends on platform is resource ID, we can get it from dtb node. OK, I think we can use a more generic compatible name like "fsl,imx-sc-thermal". Anson. > > Regards > Dong Aisheng > > > + > > Example (imx8qxp): > > ------------- > > lsio_mu1: mailbox@5d1c0000 { > > @@ -168,6 +182,12 @@ firmware { > > rtc: rtc { > > compatible = "fsl,imx8qxp-sc-rtc"; > > }; > > + > > + tsens: thermal-sensor { > > + compatible = "fsl,imx8qxp-sc-thermal"; > > + tsens-num = <1>; > > + #thermal-sensor-cells = <1>; > > + }; > > }; > > }; > > > > -- > > 2.7.4