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[68.147.8.254]) by smtp.gmail.com with ESMTPSA id j1sm94318pfj.202.2020.10.14.09.51.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Oct 2020 09:51:23 -0700 (PDT) Date: Wed, 14 Oct 2020 10:51:21 -0600 From: Mathieu Poirier To: Arnaud Pouliquen Cc: Rob Herring , Alexandre Torgue , devicetree@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, Ohad Ben-Cohen , Bjorn Andersson , Ahmad Fatoum Subject: Re: [PATCH v2 4/4] ARM: dts: stm32: update stm32mp151 for remote proc synchronization support Message-ID: <20201014165121.GA1406857@xps15> References: <20201014125441.2457-1-arnaud.pouliquen@st.com> <20201014125441.2457-5-arnaud.pouliquen@st.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201014125441.2457-5-arnaud.pouliquen@st.com> Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Wed, Oct 14, 2020 at 02:54:41PM +0200, 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 > --- > 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@5c00a000 { > + compatible = "st,stm32-tamp", "syscon"; > + reg = <0x5c00a000 0x400>; > + }; > + > /* > * 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>; Tested-by: Mathieu Poirier > status = "disabled"; > }; > }; > -- > 2.17.1 >