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]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210923194515.23757-1-eajames@linux.ibm.com \
--to=eajames@linux.ibm.com \
--cc=openbmc@lists.ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).