Thread (2 messages) 2 messages, 2 authors, 2020-02-10

Re: [PATCH v2] ARM: dts: aspeed: tiogapass: Add IPMB device

From: Joel Stanley <joel@jms.id.au>
Date: 2020-02-10 22:23:48
Also in: linux-arm-kernel, linux-aspeed, lkml

Hi Rob,

On Thu, 30 Jan 2020 at 21:46, Vijay Khemka [off-list ref] wrote:
quoted hunk ↗ jump to hunk
Adding IPMB devices for facebook tiogapass platform.

Signed-off-by: Vijay Khemka <redacted>
---
 arch/arm/boot/dts/aspeed-bmc-facebook-tiogapass.dts | 13 +++++++++++++
 1 file changed, 13 insertions(+)
diff --git a/arch/arm/boot/dts/aspeed-bmc-facebook-tiogapass.dts b/arch/arm/boot/dts/aspeed-bmc-facebook-tiogapass.dts
index fb7f034d5db2..1cb5b9bf468f 100644
--- a/arch/arm/boot/dts/aspeed-bmc-facebook-tiogapass.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-facebook-tiogapass.dts
@@ -5,6 +5,7 @@

 #include "aspeed-g5.dtsi"
 #include <dt-bindings/gpio/aspeed-gpio.h>
+#include <dt-bindings/i2c/i2c.h>

 / {
        model = "Facebook TiogaPass BMC";
@@ -428,6 +429,12 @@
 &i2c4 {
        status = "okay";
        // BMC Debug Header
+       multi-master;
+       ipmb0@10 {
+               compatible = "ipmb-dev";
+               reg = <(0x10 | I2C_OWN_SLAVE_ADDRESS)>;
This causes dtc to warn:

../arch/arm/boot/dts/aspeed-bmc-facebook-tiogapass.dts:521.11-525.4:
Warning (i2c_bus_reg): /ahb/apb/bus@1e78a000/i2c-bus@380/ipmb0@10: I2C
bus unit address format error, expected "40000010"
../arch/arm/boot/dts/aspeed-bmc-facebook-tiogapass.dts:523.3-30:
Warning (i2c_bus_reg): /ahb/apb/bus@1e78a000/i2c-bus@380/ipmb0@10:reg:
I2C address must be less than 10-bits, got "0x40000010"

The bindings mention:

 Another flag is I2C_OWN_SLAVE_ADDRESS to mark addresses on which we listen to
be devices ourselves.

include/dt-bindings/i2c/i2c.h:#define I2C_OWN_SLAVE_ADDRESS     (1 << 30)

It appears dtc needs to be fixed to not warn when seeing this value in
an i2c reg node?

Cheers,

Joel


quoted hunk ↗ jump to hunk
+               i2c-protocol;
+       };
 };

 &i2c5 {
@@ -509,6 +516,12 @@
 &i2c9 {
        status = "okay";
        //USB Debug Connector
+       multi-master;
+       ipmb0@10 {
+               compatible = "ipmb-dev";
+               reg = <(0x10 | I2C_OWN_SLAVE_ADDRESS)>;
+               i2c-protocol;
+       };
 };

 &pwm_tacho {
--
2.17.1
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