diff options
| author | Eddie James <eajames@linux.ibm.com> | 2021-10-21 00:53:20 +0300 |
|---|---|---|
| committer | Joel Stanley <joel@jms.id.au> | 2021-10-21 09:26:02 +0300 |
| commit | e175be2a718f81db17295d0f82d84c6198783a43 (patch) | |
| tree | 6df299a65c3b3f8cf5a97fb82ef1abf8e578d99b /arch/arm | |
| parent | e80e70fb05709f79a0ae9ac6e0b310c044001a11 (diff) | |
| download | linux-e175be2a718f81db17295d0f82d84c6198783a43.tar.xz | |
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>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts b/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts index 6a432bc4eafc..4412d71d8b08 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>; |