Commit e175be2a authored by Eddie James's avatar Eddie James Committed by Joel Stanley
Browse files

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: default avatarEddie James <eajames@linux.ibm.com>
Reviewed-by: default avatarJoel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20211020215321.33960-5-eajames@linux.ibm.com


Signed-off-by: default avatarJoel Stanley <joel@jms.id.au>
parent e80e70fb

arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts

+7 −1
Original line number Diff line number Diff line
@@ -1908,15 +1908,21 @@ eeprom@52 { 
};



&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>;