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Tue, 14 Apr 2026 02:00:42 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Tue, 14 Apr 2026 10:00:41 +0100 Message-Id: To: "Krzysztof Kozlowski" , "Alexey Klimov" , "Sam Protsenko" , "Rob Herring" , "Krzysztof Kozlowski" , "Conor Dooley" , "Alim Akhtar" Cc: , , , Subject: Re: [PATCH] arm64: dts: exynos850: Add SRAM node From: "Alexey Klimov" X-Mailer: aerc 0.21.0 References: <20260413-exynos850_sram-v1-1-7fda5b7fb7d4@linaro.org> <2ff077e1-8983-4a41-bb21-5e4140545aa3@kernel.org> In-Reply-To: <2ff077e1-8983-4a41-bb21-5e4140545aa3@kernel.org> On Mon Apr 13, 2026 at 4:23 PM BST, Krzysztof Kozlowski wrote: > On 13/04/2026 16:52, Alexey Klimov wrote: >> SRAM is used by the ACPM protocol to retrieve the ACPM channels >> information and configuration data. Add the SRAM node. >>=20 >> Signed-off-by: Alexey Klimov >> --- >> arch/arm64/boot/dts/exynos/exynos850.dtsi | 8 ++++++++ >> 1 file changed, 8 insertions(+) >>=20 >> diff --git a/arch/arm64/boot/dts/exynos/exynos850.dtsi b/arch/arm64/boot= /dts/exynos/exynos850.dtsi >> index cb55015c8dce..cf4a6168846c 100644 >> --- a/arch/arm64/boot/dts/exynos/exynos850.dtsi >> +++ b/arch/arm64/boot/dts/exynos/exynos850.dtsi >> @@ -910,6 +910,14 @@ spi_2: spi@11d20000 { >> }; >> }; >> }; >> + >> + apm_sram: sram@2039000 { >> + compatible =3D "mmio-sram"; >> + reg =3D <0x0 0x2039000 0x40000>; >> + #address-cells =3D <1>; >> + #size-cells =3D <1>; >> + ranges =3D <0x0 0x0 0x2039000 0x40000>; > > You miss here children. Thank you! I guess I should convert it to smth like this: apm_sram: sram@2039000 { compatible =3D "mmio-sram"; reg =3D <0x0 0x2039000 0x40000>; ranges =3D <0x0 0x0 0x2039000 0x40000>; #address-cells =3D <1>; #size-cells =3D <1>; acpm_sram_region: sram-section@0 { reg =3D <0x0 0x40000>; }; }; And then later reference shmem =3D &acpm_sram_region from acpm node. > Also, 'ranges' should be after 'reg'. Thanks, will fix this. FWIW this commit is a copy of commit 48e7821b26904 https://lore.kernel.org/r/20250207-gs101-acpm-dt-v4-1-230ba8663a2d@linaro.o= rg Best regards, Alexey