diff mbox series

[4.4,15/34] powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P2041 i2c controllers

Message ID 20210614102642.078248318@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

gregkh@linuxfoundation.org June 14, 2021, 10:27 a.m. UTC 
From: Chris Packham <chris.packham@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@alliedtelesis.co.nz>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/powerpc/boot/dts/fsl/p2041si-post.dtsi | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
diff mbox series

Patch

diff --git a/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi b/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi
index 51e975d7631a..8921f17fca42 100644
--- a/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi
+++ b/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi
@@ -389,7 +389,23 @@ 
 	};
 
 /include/ "qoriq-i2c-0.dtsi"
+	i2c@118000 {
+		fsl,i2c-erratum-a004447;
+	};
+
+	i2c@118100 {
+		fsl,i2c-erratum-a004447;
+	};
+
 /include/ "qoriq-i2c-1.dtsi"
+	i2c@119000 {
+		fsl,i2c-erratum-a004447;
+	};
+
+	i2c@119100 {
+		fsl,i2c-erratum-a004447;
+	};
+
 /include/ "qoriq-duart-0.dtsi"
 /include/ "qoriq-duart-1.dtsi"
 /include/ "qoriq-gpio-0.dtsi"