linux-kernel - [PATCH 3/3] arm64: dts: ls1028a-qds: make the QIXIS CPLD use the simple-mfd-i2c.c driver

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Message-Id: <20220127172105.4085950-4-vladimir.oltean@nxp.com>
Date:   Thu, 27 Jan 2022 19:21:05 +0200
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Shawn Guo <shawnguo@...nel.org>, Lee Jones <lee.jones@...aro.org>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Rob Herring <robh+dt@...nel.org>, Li Yang <leoyang.li@....com>,
        Michael Walle <michael@...le.cc>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 3/3] arm64: dts: ls1028a-qds: make the QIXIS CPLD use the simple-mfd-i2c.c driver

The MDIO mux on the LS1028A-QDS never worked in mainline. The device
tree was submitted as-is, and there is a downstream driver for the QIXIS
FPGA:
https://source.codeaurora.org/external/qoriq/qoriq-components/linux/tree/drivers/soc/fsl/qixis_ctrl.c?h=lf-5.10.72-2.2.0

That driver is very similar to the already existing drivers/mfd/simple-mfd-i2c.c,
and the hardware works with the simple-mfd-i2c driver, so there isn't
any reason to upstream the other one.

This change adapts the compatible string and child node format of the
FPGA node, so that the simple-mfd-i2c driver accepts it.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts b/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts
index 177bc1405f0f..6bd58fd9c90f 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts
@@ -314,17 +314,18 @@ sgtl5000: audio-codec@a {
 	};
 
 	fpga@66 {
-		compatible = "fsl,ls1028aqds-fpga", "fsl,fpga-qixis-i2c",
-			     "simple-mfd";
+		compatible = "fsl,ls1028a-qds-qixis-i2c";
 		reg = <0x66>;
+		#address-cells = <1>;
+		#size-cells = <0>;
 
-		mux: mux-controller {
+		mux: mux-controller@54 {
 			compatible = "reg-mux";
+			reg = <0x54>;
 			#mux-control-cells = <1>;
 			mux-reg-masks = <0x54 0xf0>; /* 0: reg 0x54, bits 7:4 */
 		};
 	};
-
 };
 
 &i2c1 {
-- 
2.25.1