[PATCH AUTOSEL 5.12 42/43] powerpc/fsl: set fsl, i2c-erratum-a004447 flag for P2041 i2c controllers

[Sasha Levin]

From: Chris Packham <chris.packham at alliedtelesis.co.nz>

[ Upstream commit 7adc7b225cddcfd0f346d10144fd7a3d3d9f9ea7 ]

The i2c controllers on the P2040/P2041 have an erratum where the
documented scheme for i2c bus recovery will not work (A-004447). A
different mechanism is needed which is documented in the P2040 Chip
Errata Rev Q (latest available at the time of writing).

Signed-off-by: Chris Packham <chris.packham at alliedtelesis.co.nz>
Acked-by: Michael Ellerman <mpe at ellerman.id.au>
Signed-off-by: Wolfram Sang <wsa at kernel.org>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 arch/powerpc/boot/dts/fsl/p2041si-post.dtsi | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi b/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi
index 872e4485dc3f..ddc018d42252 100644
--- a/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi
+++ b/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi
@@ -371,7 +371,23 @@ sdhc at 114000 {
 	};
 
 /include/ "qoriq-i2c-0.dtsi"
+	i2c at 118000 {
+		fsl,i2c-erratum-a004447;
+	};
+
+	i2c at 118100 {
+		fsl,i2c-erratum-a004447;
+	};
+
 /include/ "qoriq-i2c-1.dtsi"
+	i2c at 119000 {
+		fsl,i2c-erratum-a004447;
+	};
+
+	i2c at 119100 {
+		fsl,i2c-erratum-a004447;
+	};
+
 /include/ "qoriq-duart-0.dtsi"
 /include/ "qoriq-duart-1.dtsi"
 /include/ "qoriq-gpio-0.dtsi"
-- 
2.30.2