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Fri, 18 Sep 2026 04:47:37 -0700 (PDT) Date: Fri, 18 Sep 2026 13:47:35 +0200 From: Stefano Radaelli To: "Markus Schneider-Pargmann (TI)" Cc: Nishanth Menon , Vignesh Raghavendra , Tero Kristo , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Judith Mendez , Daniel Schultz , Andrew Davis , Siddharth Vadapalli , Paresh Bhagat , Bryan Brattlof , Jai Luthra , Devarsh Thakkar , Beleswar Padhi , Francesco Dolcini , Nick Desaulniers , Vishal Mahaveer , Kevin Hilman , Sebin Francis , Kendall Willis , Akashdeep Kaur , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, Hari Nagalla Subject: Re: [PATCH v9 8/9] arm64: dts: ti: k3-am62p: Split r5f memory region Message-ID: References: <20260918-topic-am62a-ioddr-dt-v6-19-v9-0-40972ef1f663@baylibre.com> <20260918-topic-am62a-ioddr-dt-v6-19-v9-8-40972ef1f663@baylibre.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260918-topic-am62a-ioddr-dt-v6-19-v9-8-40972ef1f663@baylibre.com> On Fri, Sep 18, 2026 at 11:17:52AM +0200, Markus Schneider-Pargmann (TI) wrote: > Split the firmware memory region in more specific parts so it is better > described where to find which information. Specifically the LPM metadata > region is important as bootloader software like U-Boot has to know where > that data is to be able to read that data. > > Reviewed-by: Bryan Brattlof > Reviewed-by: Kendall Willis > Signed-off-by: Markus Schneider-Pargmann (TI) > --- > .../boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi | 10 ++++++-- > arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi | 28 ++++++++++++++++++++-- > arch/arm64/boot/dts/ti/k3-am62p5-sk.dts | 28 ++++++++++++++++++++-- > arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi | 28 ++++++++++++++++++++-- > 4 files changed, 86 insertions(+), 8 deletions(-) > > diff --git a/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi > index 5d7f701420e2..84dfbfd1986c 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi > @@ -44,8 +44,14 @@ &wkup_r5fss0 { > &wkup_r5fss0_core0 { > mboxes = <&mailbox0_cluster0 &mbox_r5_0>; > memory-region = <&wkup_r5fss0_core0_dma_memory_region>, > - <&wkup_r5fss0_core0_memory_region>; > - memory-region-names = "dma", "firmware"; > + <&wkup_r5fss0_core0_ipc_region>, > + <&wkup_r5fss0_core0_lpm_fs_stub_region>, > + <&wkup_r5fss0_core0_lpm_metadata_region>, > + <&wkup_r5fss0_core0_lpm_rest_region>, > + <&wkup_r5fss0_core0_dm_region>; > + memory-region-names = "dma", "ipc", "lpm-stub", > + "lpm-metadata", "lpm-context", > + "dm-firmware"; > status = "okay"; > }; > > diff --git a/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi > index 8a5ff5c45757..45ab9d947b3a 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi > @@ -168,9 +168,33 @@ wkup_r5fss0_core0_dma_memory_region: memory@9c800000 { > no-map; > }; > > - wkup_r5fss0_core0_memory_region: memory@9c900000 { > + wkup_r5fss0_core0_ipc_region: memory@9c900000 { > compatible = "shared-dma-pool"; > - reg = <0x00 0x9c900000 0x00 0x01d08000>; > + reg = <0x00 0x9c900000 0x00 0x100000>; > + no-map; > + }; > + > + wkup_r5fss0_core0_lpm_fs_stub_region: memory@9ca00000 { > + compatible = "shared-dma-pool"; > + reg = <0x00 0x9ca00000 0x00 0x8000>; > + no-map; > + }; > + > + wkup_r5fss0_core0_lpm_metadata_region: memory@9ca08000 { > + compatible = "shared-dma-pool"; > + reg = <0x00 0x9ca08000 0x00 0x1000>; > + no-map; > + }; > + > + wkup_r5fss0_core0_lpm_rest_region: memory@9ca09000 { > + compatible = "shared-dma-pool"; > + reg = <0x00 0x9ca09000 0x00 0x97000>; > + no-map; > + }; > + > + wkup_r5fss0_core0_dm_region: memory@9caa0000 { > + compatible = "shared-dma-pool"; > + reg = <0x00 0x9caa0000 0x00 0x1b68000>; > no-map; > }; > }; > diff --git a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts > index b8af9ec81b0c..bb027c65eddd 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts > +++ b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts > @@ -55,9 +55,33 @@ wkup_r5fss0_core0_dma_memory_region: memory@9c800000 { > no-map; > }; > > - wkup_r5fss0_core0_memory_region: memory@9c900000 { > + wkup_r5fss0_core0_ipc_region: memory@9c900000 { > compatible = "shared-dma-pool"; > - reg = <0x00 0x9c900000 0x00 0x1d08000>; > + reg = <0x00 0x9c900000 0x00 0x100000>; > + no-map; > + }; > + > + wkup_r5fss0_core0_lpm_fs_stub_region: memory@9ca00000 { > + compatible = "shared-dma-pool"; > + reg = <0x00 0x9ca00000 0x00 0x8000>; > + no-map; > + }; > + > + wkup_r5fss0_core0_lpm_metadata_region: memory@9ca08000 { > + compatible = "shared-dma-pool"; > + reg = <0x00 0x9ca08000 0x00 0x1000>; > + no-map; > + }; > + > + wkup_r5fss0_core0_lpm_rest_region: memory@9ca09000 { > + compatible = "shared-dma-pool"; > + reg = <0x00 0x9ca09000 0x00 0x97000>; > + no-map; > + }; > + > + wkup_r5fss0_core0_dm_region: memory@9caa0000 { > + compatible = "shared-dma-pool"; > + reg = <0x00 0x9caa0000 0x00 0x1b68000>; > no-map; > }; > > diff --git a/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi b/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi > index 3d1a2c5bc464..31f670fdd91d 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi > @@ -69,9 +69,33 @@ wkup_r5fss0_core0_dma_memory_region: r5f-dma-memory@9c800000 { > no-map; > }; > > - wkup_r5fss0_core0_memory_region: r5f-memory@9c900000 { > + wkup_r5fss0_core0_ipc_region: r5f-memory@9c900000 { > compatible = "shared-dma-pool"; > - reg = <0x00 0x9c900000 0x00 0x01d08000>; > + reg = <0x00 0x9c900000 0x00 0x100000>; > + no-map; > + }; > + > + wkup_r5fss0_core0_lpm_fs_stub_region: r5f-memory@9ca00000 { > + compatible = "shared-dma-pool"; > + reg = <0x00 0x9ca00000 0x00 0x8000>; > + no-map; > + }; > + > + wkup_r5fss0_core0_lpm_metadata_region: r5f-memory@9ca08000 { > + compatible = "shared-dma-pool"; > + reg = <0x00 0x9ca08000 0x00 0x1000>; > + no-map; > + }; > + > + wkup_r5fss0_core0_lpm_rest_region: r5f-memory@9ca09000 { > + compatible = "shared-dma-pool"; > + reg = <0x00 0x9ca09000 0x00 0x97000>; > + no-map; > + }; > + > + wkup_r5fss0_core0_dm_region: r5f-memory@9caa0000 { > + compatible = "shared-dma-pool"; > + reg = <0x00 0x9caa0000 0x00 0x1b68000>; > no-map; > }; > > > -- > 2.55.0 > Reviewed-by: Stefano Radaelli Best Regards, Stefano