From: Eddie James <eajames@linux.ibm.com>
To: openbmc@lists.ozlabs.org
Cc: Eddie James <eajames@linux.ibm.com>
Subject: [PATCH linux dev-5.14] ARM: dts: aspeed: everest: Add IBM Operation Panel I2C device
Date: Thu, 23 Sep 2021 14:45:15 -0500 [thread overview]
Message-ID: <20210923194515.23757-1-eajames@linux.ibm.com> (raw)
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>
---
arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts b/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts
index bb6bbcb4e14f..4d95178648b1 100644
--- a/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts
@@ -2441,15 +2441,21 @@ 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>;
--
2.27.0
reply other threads:[~2021-09-23 19:46 UTC|newest]
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