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Fri, 11 Sep 2026 09:22:02 -0700 (PDT) Received: from localhost ([94.4.85.166]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49e6576122bsm75330195e9.2.2026.09.11.09.22.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 11 Sep 2026 09:22:01 -0700 (PDT) Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Fri, 11 Sep 2026 17:22:01 +0100 Message-Id: Cc: "Rob Herring" , "Krzysztof Kozlowski" , "Conor Dooley" , "Alim Akhtar" , "Peter Griffin" , "Tudor Ambarus" , , , , Subject: Re: [PATCH v3 2/2] arm64: dts: exynos850: Add acpm SRAM node From: "Alexey Klimov" To: "Sam Protsenko" X-Mailer: aerc 0.21.0 References: <20260727-exynos850_sram-v3-0-8627a49188ec@linaro.org> <20260727-exynos850_sram-v3-2-8627a49188ec@linaro.org> In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260911_092204_452772_69E8DF8F X-CRM114-Status: GOOD ( 14.03 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri Sep 11, 2026 at 1:28 AM BST, Sam Protsenko wrote: > On Mon, Jul 27, 2026 at 8:23=E2=80=AFAM Alexey Klimov wrote: >> >> SRAM is used by the ACPM protocol to retrieve the ACPM channels >> information and configuration data. Add the SRAM node. >> >> Signed-off-by: Alexey Klimov >> --- >> arch/arm64/boot/dts/exynos/exynos850.dtsi | 5 +++++ >> 1 file changed, 5 insertions(+) >> >> diff --git a/arch/arm64/boot/dts/exynos/exynos850.dtsi b/arch/arm64/boot= /dts/exynos/exynos850.dtsi >> index 3881f573ec08..0b614caa411c 100644 >> --- a/arch/arm64/boot/dts/exynos/exynos850.dtsi >> +++ b/arch/arm64/boot/dts/exynos/exynos850.dtsi >> @@ -163,6 +163,11 @@ soc: soc@0 { >> #size-cells =3D <1>; >> ranges =3D <0x0 0x0 0x0 0x20000000>; >> >> + apm_sram: sram@2039000 { >> + compatible =3D "samsung,exynos850-acpm-sram"; >> + reg =3D <0x2039000 0x40000>; > > Why it's 0x40000? I checked the TRM, and it says iRAM APM area is from > 0x02039000 to 0x02069000, which is 0x30000 (192 KiB). The downstream > kernel (v4.14) also say the APM SRAM size is 0x30000. Good catch. That's my bad. Thanks, Alexey