linux-kernel - [PATCH v2 4/9] arm64: dts: juno: drop useless 'dma-channels/requests' properties

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Date:   Sat, 30 Apr 2022 14:18:57 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Dinh Nguyen <dinguyen@...nel.org>,
        Michal Simek <michal.simek@...inx.com>,
        Liviu Dudau <liviu.dudau@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Broadcom Kernel Team <bcm-kernel-feedback-list@...adcom.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Herring <robh@...nel.org>
Subject: [PATCH v2 4/9] arm64: dts: juno: drop useless 'dma-channels/requests' properties

The pl330 DMA controller provides number of DMA channels and requests
through its registers, so duplicating this information (with a chance of
mistakes) in DTS is pointless.  Additionally the DTS used always wrong
property names which causes DT schema check failures - the bindings
documented 'dma-channels' and 'dma-requests' properties without leading
hash sign.

Another reason is that the number of requests also does not seem right
(should be 8).

Reported-by: Rob Herring <robh@...nel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 arch/arm64/boot/dts/arm/juno-base.dtsi | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/arm64/boot/dts/arm/juno-base.dtsi b/arch/arm64/boot/dts/arm/juno-base.dtsi
index 4f40a5c8f565..065381c1cbf5 100644
--- a/arch/arm64/boot/dts/arm/juno-base.dtsi
+++ b/arch/arm64/boot/dts/arm/juno-base.dtsi
@@ -829,8 +829,6 @@ dma-controller@...00000 {
 		compatible = "arm,pl330", "arm,primecell";
 		reg = <0x0 0x7ff00000 0 0x1000>;
 		#dma-cells = <1>;
-		#dma-channels = <8>;
-		#dma-requests = <32>;
 		interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 90 IRQ_TYPE_LEVEL_HIGH>,
-- 
2.32.0