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Date: Thu, 6 May 2021 13:10:13 +1200
From: Chris Packham <chris.packham@...iedtelesis.co.nz>
To: wsa@...nel.org, andriy.shevchenko@...ux.intel.com,
andy.shevchenko@...il.com, robh+dt@...nel.org, mpe@...erman.id.au
Cc: linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
Chris Packham <chris.packham@...iedtelesis.co.nz>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>
Subject: [PATCH 2/3] powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P2041 i2c controllers
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@...iedtelesis.co.nz>
---
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@...000 {
};
/include/ "qoriq-i2c-0.dtsi"
+ i2c@...000 {
+ fsl,i2c-erratum-a004447;
+ };
+
+ i2c@...100 {
+ fsl,i2c-erratum-a004447;
+ };
+
/include/ "qoriq-i2c-1.dtsi"
+ i2c@...000 {
+ fsl,i2c-erratum-a004447;
+ };
+
+ i2c@...100 {
+ fsl,i2c-erratum-a004447;
+ };
+
/include/ "qoriq-duart-0.dtsi"
/include/ "qoriq-duart-1.dtsi"
/include/ "qoriq-gpio-0.dtsi"
--
2.31.1
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