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[93.34.120.147]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-439b485a0b6sm20131646f8f.39.2026.03.03.07.55.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 03 Mar 2026 07:55:55 -0800 (PST) Message-ID: <84ccccd0-bbf6-4f36-9862-68264f85ed9e@gmail.com> Date: Tue, 3 Mar 2026 16:55:53 +0100 Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1] arm64: dts: freescale: imx95-toradex-smarc: Support Cortex M7 To: Frank Li , peng.fan@oss.nxp.com Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Sascha Hauer , Emanuele Ghidoli , Pengutronix Kernel Team , Fabio Estevam , devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20260303121324.1576841-1-ghidoliemanuele@gmail.com> Content-Language: en-US From: Emanuele Ghidoli In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 3/3/26 16:38, Frank Li wrote: > On Tue, Mar 03, 2026 at 01:13:06PM +0100, Emanuele Ghidoli wrote: >> From: Emanuele Ghidoli >> >> Enable Cortex M7, the vring nodes, a mailbox and reserve DDR memory for >> the M7. The remoteproc framework is so capable to load and run the M7 >> firmware. >> >> Signed-off-by: Emanuele Ghidoli >> --- >> .../dts/freescale/imx95-toradex-smarc.dtsi | 50 +++++++++++++++++++ >> 1 file changed, 50 insertions(+) >> >> diff --git a/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi b/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi >> index 5932ba238a8a..77c4a6dee098 100644 >> --- a/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi >> +++ b/arch/arm64/boot/dts/freescale/imx95-toradex-smarc.dtsi >> @@ -42,6 +42,16 @@ clk_serdes_eth_ref: clock-eth-ref { >> enable-gpios = <&som_gpio_expander_1 13 GPIO_ACTIVE_HIGH>; >> }; >> >> + cm7: remoteproc-cm7 { >> + compatible = "fsl,imx95-cm7"; >> + mbox-names = "tx", "rx", "rxdb"; >> + mboxes = <&mu7 0 1 >> + &mu7 1 1 >> + &mu7 3 1>; >> + memory-region = <&vdevbuffer>, <&vdev0vring0>, <&vdev0vring1>, >> + <&vdev1vring0>, <&vdev1vring1>, <&rsc_table>, <&m7_reserved>; >> + }; >> + >> connector { >> compatible = "gpio-usb-b-connector", "usb-b-connector"; >> /* SMARC P64 - USB0_OTG_ID */ >> @@ -156,6 +166,42 @@ linux_cma: linux,cma { >> alloc-ranges = <0 0x80000000 0 0x7f000000>; >> linux,cma-default; >> }; >> + >> + m7_reserved: memory@80000000 { >> + reg = <0 0x80000000 0 0x1000000>; >> + no-map; >> + }; >> + >> + rsc_table: memory@88220000 { > > I remember driver use hardcode rsc-table, I suggest fan pan to update > driver to support memory-region-names to avoid use hidden ABI. > > Fan peng, what's current status? > > Frank > >> + reg = <0 0x88220000 0 0x1000>; >> + no-map; >> + }; >> + >> + vdev0vring0: memory@88000000 { >> + reg = <0 0x88000000 0 0x8000>; >> + no-map; >> + }; >> + >> + vdev0vring1: memory@88008000 { >> + reg = <0 0x88008000 0 0x8000>; >> + no-map; >> + }; >> + >> + vdev1vring0: memory@88010000 { >> + reg = <0 0x88010000 0 0x8000>; >> + no-map; >> + }; >> + >> + vdev1vring1: memory@88018000 { >> + reg = <0 0x88018000 0 0x8000>; >> + no-map; >> + }; >> + >> + vdevbuffer: memory@88020000 { >> + compatible = "shared-dma-pool"; >> + reg = <0 0x88020000 0 0x100000>; >> + no-map; >> + }; >> }; >> }; >> >> @@ -572,6 +618,10 @@ &lpuart3 { >> pinctrl-0 = <&pinctrl_uart3>; >> }; >> >> +&mu7 { >> + status = "okay"; >> +}; >> + >> /* SMARC MDIO, shared between all ethernet ports */ >> &netc_emdio { >> pinctrl-names = "default"; >> -- >> 2.43.0 >> Thanks Frank. You’re right. I spotted that my patch is not working as expected, due to a last minute renaming on my side. I’ll rework the patch accordingly and send a v2 to align to current expected naming. Emanuele