On Wed, Mar 31, 2021 at 07:04:51PM CDT, Andrew Jeffery wrote:

On Tue, 30 Mar 2021, at 10:53, Zev Weiss wrote:

quoted

This is a relatively low-cost AST2500-based Xeon E-2100/E-2200 series
mini-ITX board that we hope can provide a decent platform for OpenBMC
development.

This initial device-tree provides the necessary configuration for
basic BMC functionality such as host power control, serial console and
KVM support, and POST code snooping.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
---
 .../boot/dts/aspeed-bmc-asrock-e3c246d4i.dts  | 188 ++++++++++++++++++
 1 file changed, 188 insertions(+)
 create mode 100644 arch/arm/boot/dts/aspeed-bmc-asrock-e3c246d4i.dts

diff --git a/arch/arm/boot/dts/aspeed-bmc-asrock-e3c246d4i.dts

b/arch/arm/boot/dts/aspeed-bmc-asrock-e3c246d4i.dts
new file mode 100644
index 000000000000..27b34c3cf67a

--- /dev/null
+++ b/arch/arm/boot/dts/aspeed-bmc-asrock-e3c246d4i.dts

@@ -0,0 +1,188 @@
+// SPDX-License-Identifier: GPL-2.0+
+/dts-v1/;
+
+#include "aspeed-g5.dtsi"
+#include <dt-bindings/gpio/aspeed-gpio.h>
+#include <dt-bindings/i2c/i2c.h>
+
+/{
+	model = "ASRock E3C246D4I BMC";
+	compatible = "aspeed,ast2500";
+
+	aliases {
+		serial4 = &uart5;
+	};
+
+	chosen {
+		stdout-path = &uart5;
+		bootargs = "console=tty0 console=ttyS4,115200 earlyprintk";
+	};
+
+	memory@80000000 {
+		reg = <0x80000000 0x20000000>;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		heartbeat {
+			/* BMC_HB_LED_N */
+			gpios = <&gpio ASPEED_GPIO(H, 6) GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "timer";
+		};
+
+		system-fault {
+			/* SYSTEM_FAULT_LED_N */
+			gpios = <&gpio ASPEED_GPIO(Z, 2) GPIO_ACTIVE_LOW>;
+			panic-indicator;
+		};
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		uid-button {
+			label = "uid-button";
+			gpios = <&gpio ASPEED_GPIO(F, 1) GPIO_ACTIVE_LOW>;
+			linux,code = <ASPEED_GPIO(F, 1)>;
+		};
+	};
+
+	iio-hwmon {
+		compatible = "iio-hwmon";
+		io-channels = <&adc 0>, <&adc 1>, <&adc 2>, <&adc 3>, <&adc 4>,
+			<&adc 5>, <&adc 6>, <&adc 7>, <&adc 8>, <&adc 9>,
+			<&adc 10>, <&adc 11>, <&adc 12>;
+	};
+};

You're hooking up the ADC lines to the iio-hwmon bridge...

quoted

+
+&adc {
+	status = "okay";
+};

But you haven't requested the ADC lines from pinmux here.

It will *happen* to work as expected because ADC is the default mux
state for the pins, but by not requesting the lines you're leaving the
pins available for a conflicting request, which can be annoying to
debug.

Ack, thanks -- will fix & resend.

quoted

+
+&kcs3 {
+	status = "okay";
+	aspeed,lpc-io-reg = <0xca2>;
+};

Given you need KCS support, do you mind testing my KCS series?

https://lore.kernel.org/linux-arm-kernel/20210319062752.145730-1-andrew@aj.id.au/ (local)

Sure, I'll try to give that a shot and report back in the next day or 
two.

The cover letter got detached, and is here:

https://lore.kernel.org/linux-arm-kernel/20210319061952.145040-1-andrew@aj.id.au/ (local)

Andrew

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