From: Eddie James <eajames@linux.ibm.com>
Date: Wed, 20 Oct 2021 21:53:20 +0000 (-0500)
Subject: ARM: dts: aspeed: everest: Add IBM Operation Panel I2C device
X-Git-Tag: v6.6.17~8919^2~8^2~11
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e175be2a718f81db17295d0f82d84c6198783a43;p=platform%2Fkernel%2Flinux-rpi.git

ARM: dts: aspeed: everest: Add IBM Operation Panel I2C device

Set I2C bus 14 to multi-master mode and add the panel device that will
register the I2C controller as a slave device.
In addition, in early Everest systems, the panel device was behind an
I2C switch, which doesn't work for slave mode. Get it working (albeit
unreliably, since a master transaction might switch the switch at any
moment) by defaulting the switch channel to the one with the panel.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20211020215321.33960-5-eajames@linux.ibm.com
Signed-off-by: Joel Stanley <joel@jms.id.au>
---

diff --git a/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts b/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts
index 6a432bc..4412d71 100644
--- a/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts
@@ -1908,15 +1908,21 @@
 };
 
 &i2c14 {
+	multi-master;
 	status = "okay";
 
+	ibm-panel@62 {
+		compatible = "ibm,op-panel";
+		reg = <(0x62 | I2C_OWN_SLAVE_ADDRESS)>;
+	};
+
 	i2c-switch@70 {
 		compatible = "nxp,pca9546";
 		reg = <0x70>;
 		#address-cells = <1>;
 		#size-cells = <0>;
 		status = "okay";
-		i2c-mux-idle-disconnect;
+		idle-state = <1>;
 
 		i2c14mux0chn0: i2c@0 {
 			#address-cells = <1>;