linux-kernel - [PATCH] ARM: dts: ux500: Use "arm,pl031" compatible for PL031

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Message-Id: <20191124205110.48031-1-stephan@gerhold.net>
Date:   Sun, 24 Nov 2019 21:51:10 +0100
From:   Stephan Gerhold <stephan@...hold.net>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Stephan Gerhold <stephan@...hold.net>
Subject: [PATCH] ARM: dts: ux500: Use "arm,pl031" compatible for PL031

The Ux500 device tree uses "arm,rtc-pl031" as compatible for PL031.
All other boards in Linux describe it using "arm,pl031" instead.
This works because the compatible is not actually used in Linux:
AMBA devices get probed based on "arm,primecell" and their peripheral ID.

Nevertheless, some other projects (e.g. U-Boot) rely on the compatible
to probe the device with the correct driver. Those will look for
"arm,pl031" instead of "arm,rtc-pl031", preventing the RTC from being
probed.

Change it to "arm,pl031" to match all other boards.

Signed-off-by: Stephan Gerhold <stephan@...hold.net>
---
 arch/arm/boot/dts/ste-dbx5x0.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/ste-dbx5x0.dtsi b/arch/arm/boot/dts/ste-dbx5x0.dtsi
index 51ac65b78be0..0a5b88702b16 100644
--- a/arch/arm/boot/dts/ste-dbx5x0.dtsi
+++ b/arch/arm/boot/dts/ste-dbx5x0.dtsi
@@ -324,7 +324,7 @@
 		};

 		rtc@...54000 {
-			compatible = "arm,rtc-pl031", "arm,primecell";
+			compatible = "arm,pl031", "arm,primecell";
 			reg = <0x80154000 0x1000>;
 			interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;

-- 
2.24.0