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Fri, 18 Sep 2026 04:48:16 -0700 (PDT) Date: Fri, 18 Sep 2026 13:48:12 +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 9/9] arm64: dts: ti: Add wkup R5F nodes to pre-ram bootphase Message-ID: References: <20260918-topic-am62a-ioddr-dt-v6-19-v9-0-40972ef1f663@baylibre.com> <20260918-topic-am62a-ioddr-dt-v6-19-v9-9-40972ef1f663@baylibre.com> Precedence: bulk X-Mailing-List: linux-kernel@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-v9-9-40972ef1f663@baylibre.com> On Fri, Sep 18, 2026 at 11:17:53AM +0200, Markus Schneider-Pargmann (TI) wrote: > For IO+DDR the wkup_r5fss0_core0 and the > wkup_r5fss0_core0_lpm_metadata_region need to be accessed before RAM > setup is done. These are used to read the lpm metadata region in > which data is stored to resume. This needs to be done before RAM is > in use to avoid overwriting data. > > Add the bootph-pre-ram flag to the wkup_r5fss0_core0 node in both > ipc-firmware dtsi files and to the lpm metadata region nodes of the > AM62A and AM62P boards. > > The board level bootph-pre-ram flag of k3-am62d2-evm.dts becomes > redundant with the dtsi-wide flag and is dropped. > > Signed-off-by: Markus Schneider-Pargmann (TI) > --- > arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi | 1 + > arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi | 1 + > arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 1 + > arch/arm64/boot/dts/ti/k3-am62d2-evm.dts | 4 ---- > arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi | 1 + > arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi | 1 + > arch/arm64/boot/dts/ti/k3-am62p5-sk.dts | 1 + > arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi | 1 + > 8 files changed, 7 insertions(+), 4 deletions(-) > > diff --git a/arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi > index 7fa19ced1a23..12be777a35ca 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi > @@ -80,6 +80,7 @@ wkup_r5fss0_core0_lpm_fs_stub_region: memory@9ca00000 { > wkup_r5fss0_core0_lpm_metadata_region: memory@9ca08000 { > compatible = "shared-dma-pool"; > reg = <0x00 0x9ca08000 0x00 0x1000>; > + bootph-pre-ram; > no-map; > }; > > diff --git a/arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi > index 94c1d60d8d7a..7beca54e75ee 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi > @@ -63,6 +63,7 @@ &wkup_r5fss0 { > }; > > &wkup_r5fss0_core0 { > + bootph-pre-ram; > mboxes = <&mailbox0_cluster0>, <&mbox_r5_0>; > memory-region = <&wkup_r5fss0_core0_dma_memory_region>, > <&wkup_r5fss0_core0_ipc_region>, > diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts > index 871ec227def9..fe75f6b6b50b 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts > +++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts > @@ -74,6 +74,7 @@ wkup_r5fss0_core0_lpm_fs_stub_region: memory@9ca00000 { > wkup_r5fss0_core0_lpm_metadata_region: memory@9ca08000 { > compatible = "shared-dma-pool"; > reg = <0x00 0x9ca08000 0x00 0x1000>; > + bootph-pre-ram; > no-map; > }; > > diff --git a/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts b/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts > index 7cba3ff99e6a..f87d6d515e2b 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts > +++ b/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts > @@ -800,10 +800,6 @@ partition@3fc0000 { > }; > }; > > -&wkup_r5fss0_core0 { > - bootph-pre-ram; > -}; > - > &mcu_r5fss0_core0 { > firmware-name = "am62d-mcu-r5f0_0-fw"; > }; > 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 84dfbfd1986c..277d7e268cfe 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 > @@ -42,6 +42,7 @@ &wkup_r5fss0 { > }; > > &wkup_r5fss0_core0 { > + bootph-pre-ram; > mboxes = <&mailbox0_cluster0 &mbox_r5_0>; > memory-region = <&wkup_r5fss0_core0_dma_memory_region>, > <&wkup_r5fss0_core0_ipc_region>, > diff --git a/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi > index 45ab9d947b3a..62a518dbbdbe 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi > @@ -183,6 +183,7 @@ wkup_r5fss0_core0_lpm_fs_stub_region: memory@9ca00000 { > wkup_r5fss0_core0_lpm_metadata_region: memory@9ca08000 { > compatible = "shared-dma-pool"; > reg = <0x00 0x9ca08000 0x00 0x1000>; > + bootph-pre-ram; > 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 bb027c65eddd..39af098e4db2 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts > +++ b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts > @@ -70,6 +70,7 @@ wkup_r5fss0_core0_lpm_fs_stub_region: memory@9ca00000 { > wkup_r5fss0_core0_lpm_metadata_region: memory@9ca08000 { > compatible = "shared-dma-pool"; > reg = <0x00 0x9ca08000 0x00 0x1000>; > + bootph-pre-ram; > 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 31f670fdd91d..2eefbd8d47a4 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi > @@ -84,6 +84,7 @@ wkup_r5fss0_core0_lpm_fs_stub_region: r5f-memory@9ca00000 { > wkup_r5fss0_core0_lpm_metadata_region: r5f-memory@9ca08000 { > compatible = "shared-dma-pool"; > reg = <0x00 0x9ca08000 0x00 0x1000>; > + bootph-pre-ram; > no-map; > }; > > > -- > 2.55.0 > Reviewed-by: Stefano Radaelli Best Regards, Stefano