linux-kernel - [PATCH v2] ARM: dts: at91: sama5d27_som1

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Date:   Thu, 5 Dec 2019 07:43:59 +0000
From:   <Eugen.Hristev@...rochip.com>
To:     <alexandre.belloni@...tlin.com>
CC:     <Ludovic.Desroches@...rochip.com>, <robh+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <Eugen.Hristev@...rochip.com>
Subject: [PATCH v2] ARM: dts: at91: sama5d27_som1_ek: add i2c filters
 properties

From: Eugen Hristev <eugen.hristev@...rochip.com>

Add properties for i2c filters for i2c0 and i2c1 on sama5d27_som1_ek.
Noise is affecting communication on i2c for example when connecting i2c
camera sensors.

Signed-off-by: Eugen Hristev <eugen.hristev@...rochip.com>
---

Changes in v2:
- properties were at the wrong node for i2c0, need to be at the i2c node
not the parent flexcom

 arch/arm/boot/dts/at91-sama5d27_som1_ek.dts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts b/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
index fca5716..b0853bf 100644
--- a/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
+++ b/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
@@ -131,6 +131,9 @@
 					interrupts = <20 IRQ_TYPE_LEVEL_HIGH 7>;
 					dmas = <0>, <0>;
 					dma-names = "tx", "rx";
+					i2c-analog-filter;
+					i2c-digital-filter;
+					i2c-digital-filter-width-ns = <35>;
 					#address-cells = <1>;
 					#size-cells = <0>;
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 20>;
@@ -246,6 +249,9 @@
 
 			i2c1: i2c@...28000 {
 				dmas = <0>, <0>;
+				i2c-analog-filter;
+				i2c-digital-filter;
+				i2c-digital-filter-width-ns = <35>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_i2c1_default>;
 				status = "okay";
-- 
2.7.4