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Date: Thu, 24 Sep 2020 07:45:11 +0200 From: Ahmad Fatoum <a.fatoum@...gutronix.de> To: Arnaud Pouliquen <arnaud.pouliquen@...com>, Rob Herring <robh@...nel.org>, Alexandre Torgue <alexandre.torgue@...com> Cc: Ohad Ben-Cohen <ohad@...ery.com>, devicetree@...r.kernel.org, Mathieu Poirier <mathieu.poirier@...aro.org>, linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org, Fabien Dessenne <fabien.dessenne@...com>, Bjorn Andersson <bjorn.andersson@...aro.org>, linux-stm32@...md-mailman.stormreply.com, linux-arm-kernel@...ts.infradead.org Subject: Re: [Linux-stm32] [PATCH 3/3] ARM: dts: stm32: update stm32mp151 for remote proc synchronisation support Hello Arnaud, On 8/27/20 9:21 AM, Arnaud Pouliquen wrote: > Two backup registers are used to store the Cortex-M4 state and the resource > table address. > Declare the tamp node and add associated properties in m4_rproc node > to allow Linux to attach to a firmware loaded by the first boot stages. > > Associated driver implementation is available in commit 9276536f455b3 > ("remoteproc: stm32: Parse syscon that will manage M4 synchronisation"). > > Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@...com> > --- > arch/arm/boot/dts/stm32mp151.dtsi | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/arch/arm/boot/dts/stm32mp151.dtsi b/arch/arm/boot/dts/stm32mp151.dtsi > index bfe29023fbd5..842ecffae73a 100644 > --- a/arch/arm/boot/dts/stm32mp151.dtsi > +++ b/arch/arm/boot/dts/stm32mp151.dtsi > @@ -1541,6 +1541,11 @@ > status = "disabled"; > }; > > + tamp: tamp@...0a000 { > + compatible = "st,stm32-tamp", "syscon"; > + reg = <0x5c00a000 0x400>; > + }; > + Just saw this now. I have a pending patch adding this node as well: https://lore.kernel.org/patchwork/patch/1306971/ For my use case, I need a "simple-mfd" compatible to allow child nodes to be probed. Could you CC me when you send out your v2, so I can rebase? (Or if you don't mind, just add the "simple-mfd" into the compatible list yourself :-) Cheers Ahmad > /* > * Break node order to solve dependency probe issue between > * pinctrl and exti. > @@ -1717,6 +1722,8 @@ > st,syscfg-holdboot = <&rcc 0x10C 0x1>; > st,syscfg-tz = <&rcc 0x000 0x1>; > st,syscfg-pdds = <&pwr_mcu 0x0 0x1>; > + st,syscfg-rsc-tbl = <&tamp 0x144 0xFFFFFFFF>; > + st,syscfg-m4-state = <&tamp 0x148 0xFFFFFFFF>; > status = "disabled"; > }; > }; > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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