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Mon, 10 Aug 2026 08:22:01 -0700 (PDT) Received: from deb05.proceq.com ([213.160.61.66]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-499740a70c3sm99255e9.3.2026.08.10.08.22.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Aug 2026 08:22:01 -0700 (PDT) From: Mehmet Fide To: Shawn Guo , Sascha Hauer , Stefan Agner Cc: Pengutronix Kernel Team , Fabio Estevam , Francesco Dolcini , linux-arm-kernel@lists.infradead.org, imx@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH] ARM: dts: vf500: describe the Cortex-A5 L1 caches Date: Mon, 10 Aug 2026 17:22:00 +0200 Message-ID: <20260810152200.3230971-1-mehmet.fide@gmail.com> X-Mailer: git-send-email 2.54.0 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" From: Mehmet Fide The cpu node carries no cache properties, so cacheinfo has nothing to build the hierarchy from and gives up at boot: cacheinfo: Unable to detect cache hierarchy for CPU 0 The level and the type of the two L1 caches come from CLIDR and CCSIDR, but the geometry does not, so /sys/devices/system/cpu/cpu0/cache is left without a size, a line size or a set count. Fill them in from the Vybrid reference manual (NXP VFXXXRM), table 2-4 "Platform modules": the A5 has a 2 way set associative 32 KB instruction cache and a 4 way set associative 32 KB data cache, both with a 32 byte line, so 512 and 256 sets. Tested on a Colibri VF50. The warning is gone and sysfs now reports both caches with the geometry above. Signed-off-by: Mehmet Fide --- arch/arm/boot/dts/nxp/vf/vf500.dtsi | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/boot/dts/nxp/vf/vf500.dtsi b/arch/arm/boot/dts/nxp/vf= /vf500.dtsi index 71ccdaa..a73e9a8 100644 --- a/arch/arm/boot/dts/nxp/vf/vf500.dtsi +++ b/arch/arm/boot/dts/nxp/vf/vf500.dtsi @@ -18,6 +18,12 @@ a5_cpu: cpu@0 { compatible =3D "arm,cortex-a5"; device_type =3D "cpu"; + d-cache-line-size =3D <32>; + d-cache-sets =3D <256>; + d-cache-size =3D <0x8000>; + i-cache-line-size =3D <32>; + i-cache-sets =3D <512>; + i-cache-size =3D <0x8000>; reg =3D <0x0>; }; }; --=20 2.54.0