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Thu, 15 May 2025 12:39:43 -0700 (PDT) From: Alexey Charkov Date: Thu, 15 May 2025 22:38:44 +0300 Subject: [PATCH v2 5/5] ARM: dts: vt8500: Add L2 cache controller on WM8850/WM8950 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="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250515-wmt-dts-updates-v2-5-246937484cc8@gmail.com> References: <20250515-wmt-dts-updates-v2-0-246937484cc8@gmail.com> In-Reply-To: <20250515-wmt-dts-updates-v2-0-246937484cc8@gmail.com> To: Krzysztof Kozlowski , Rob Herring , Conor Dooley Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Alexey Charkov X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1747337978; l=1530; i=alchark@gmail.com; s=20250416; h=from:subject:message-id; bh=DSJDp1z7Pob8W8/VBKGX9pG7ZPkhnhBiDbakz3e1J+w=; b=hwJTzNQJOYQCe6IRsbCMKSqAddv28lmp6tN7TrwXhYQbbq4z3f6Q9twes4NDmNZJw2jId1sHU p2D3+CloCBlBq/z1wjmefdnxS2S56XFF7QDJQ2TmC5JX5bqi5hoVDi/ X-Developer-Key: i=alchark@gmail.com; a=ed25519; pk=ltKbQzKLTJPiDgPtcHxdo+dzFthCCMtC3V9qf7+0rkc= WonderMedia WM8850/WM8950 uses an ARM PL310 cache controller for its L2 cache, add it. The parameters have been deduced from vendor's U-boot environment variables, which the downstream code uses to initialize the controller. They set the following register values: aux =3D 0x3e440000 prefetch_ctrl =3D 0x70000007 Their initialization code also unconditionally sets the flags L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN, so encode those too Signed-off-by: Alexey Charkov --- arch/arm/boot/dts/vt8500/wm8850.dtsi | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm/boot/dts/vt8500/wm8850.dtsi b/arch/arm/boot/dts/vt850= 0/wm8850.dtsi index f741a3e88d74ab4740f200b9b96201b3dc799bad..58109aa05f74b67cda82b5ebd01= 27662e475ded6 100644 --- a/arch/arm/boot/dts/vt8500/wm8850.dtsi +++ b/arch/arm/boot/dts/vt8500/wm8850.dtsi @@ -18,6 +18,7 @@ cpu@0 { device_type =3D "cpu"; compatible =3D "arm,cortex-a9"; reg =3D <0x0>; + next-level-cache =3D <&l2_cache>; }; }; =20 @@ -308,5 +309,18 @@ ethernet@d8004000 { reg =3D <0xd8004000 0x100>; interrupts =3D <10>; }; + + l2_cache: cache-controller@d9000000 { + compatible =3D "arm,pl310-cache"; + reg =3D <0xd9000000 0x1000>; + arm,double-linefill =3D <1>; + arm,dynamic-clock-gating =3D <1>; + arm,shared-override; + arm,standby-mode =3D <1>; + cache-level =3D <2>; + cache-unified; + prefetch-data =3D <1>; + prefetch-instr =3D <1>; + }; }; }; --=20 2.49.0