From: Kuan-Wei Chiu <visitorckw@gmail.com>
To: linusw@kernel.org, robh@kernel.org, krzk+dt@kernel.org,
conor+dt@kernel.org, arnd@arndb.de
Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, jserv@ccns.ncku.edu.tw,
eleanor15x@gmail.com, Kuan-Wei Chiu <visitorckw@gmail.com>,
stable@vger.kernel.org
Subject: [PATCH v2] ARM: dts: integrator: Fix DMA ranges mismatch warning on IM-PD1
Date: Thu, 25 Dec 2025 17:31:18 +0000 [thread overview]
Message-ID: <20251225173118.580110-1-visitorckw@gmail.com> (raw)
When compiling the device tree for the Integrator/AP with IM-PD1, the
following warning is observed regarding the display controller node:
arch/arm/boot/dts/arm/integratorap-im-pd1.dts:251.3-14: Warning
(dma_ranges_format):
/bus@c0000000/bus@c0000000/display@1000000:dma-ranges: empty
"dma-ranges" property but its #address-cells (2) differs from
/bus@c0000000/bus@c0000000 (1)
The "dma-ranges" property is intended to describe DMA address
translations for child nodes. However, the only child of the display
controller is a "port" node, which does not perform DMA memory
accesses.
Since the property is not required for the child node and triggers a
warning due to default address cell mismatch, remove it.
Fixes: 7bea67a99430 ("ARM: dts: integrator: Fix DMA ranges")
Cc: stable@vger.kernel.org
Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
---
Changes in v2:
- Switch approach to remove the unused "dma-ranges" property instead of
adding "#address-cells" and "#size-cells".
arch/arm/boot/dts/arm/integratorap-im-pd1.dts | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm/boot/dts/arm/integratorap-im-pd1.dts b/arch/arm/boot/dts/arm/integratorap-im-pd1.dts
index db13e09f2fab..0e568baf03b0 100644
--- a/arch/arm/boot/dts/arm/integratorap-im-pd1.dts
+++ b/arch/arm/boot/dts/arm/integratorap-im-pd1.dts
@@ -248,7 +248,6 @@ display@1000000 {
/* 640x480 16bpp @ 25.175MHz is 36827428 bytes/s */
max-memory-bandwidth = <40000000>;
memory-region = <&impd1_ram>;
- dma-ranges;
port@0 {
#address-cells = <1>;
--
2.52.0.358.g0dd7633a29-goog
next reply other threads:[~2025-12-25 17:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-25 17:31 Kuan-Wei Chiu [this message]
2025-12-29 20:39 ` [PATCH v2] ARM: dts: integrator: Fix DMA ranges mismatch warning on IM-PD1 Rob Herring
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