Re: [PATCH v3 2/2] ARM: dts: aspeed: add asrock x470d4u bmc

[Zev Weiss <zev@bewilderbeest.net>]

Hi Tan,

Looks good overall to me, just a couple small notes below...

On Wed, Aug 12, 2026 at 01:28:27PM PDT, Tan Siewert wrote:
>The ASRock Rack X470D4U X470D4U is a single-socket X470-based microATX
>motherboard for Ryzen processors with an AST2500 BMC and either 32MB or
>64MB SPI flash.
>
>This mainboard exists in three known "flavors" which only differ in the
>used host NIC, the BMC SPI size and some parts that may be un-populated.
>
>To allow the use of the full SPI flash, add two trees, one of which has
>the 32M layout with the base config, and a 64M tree that includes the
>base tree.
>
>Signed-off-by: Tan Siewert <tan@siewert.io>
>---
> arch/arm/boot/dts/aspeed/Makefile                  |   2 +
> .../aspeed/aspeed-bmc-asrock-x470d4u-data64.dts    |  15 +
> .../boot/dts/aspeed/aspeed-bmc-asrock-x470d4u.dts  | 381 +++++++++++++++++++++
> 3 files changed, 398 insertions(+)
>
>diff --git a/arch/arm/boot/dts/aspeed/Makefile b/arch/arm/boot/dts/aspeed/Makefile
>index 6b68671f9379..e27d33e85fb2 100644
>--- a/arch/arm/boot/dts/aspeed/Makefile
>+++ b/arch/arm/boot/dts/aspeed/Makefile
>@@ -15,6 +15,8 @@ dtb-$(CONFIG_ARCH_ASPEED) += \
> 	aspeed-bmc-asrock-paul-ipmi-card.dtb \
> 	aspeed-bmc-asrock-romed8hm3.dtb \
> 	aspeed-bmc-asrock-spc621d8hm3.dtb \
>+	aspeed-bmc-asrock-x470d4u.dtb \
>+	aspeed-bmc-asrock-x470d4u-data64.dtb \
> 	aspeed-bmc-asrock-x570d4u.dtb \
> 	aspeed-bmc-asus-kommando-ipmi-card.dtb \
> 	aspeed-bmc-asus-x4tf.dtb \
>diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-x470d4u-data64.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-x470d4u-data64.dts
>new file mode 100644
>index 000000000000..6f11aeab087c
>--- /dev/null
>+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-x470d4u-data64.dts
>@@ -0,0 +1,15 @@
>+// SPDX-License-Identifier: GPL-2.0+
>+
>+#include "aspeed-bmc-asrock-x470d4u.dts"
>+
>+/ {
>+	compatible = "asrock,x470d4u-data64-bmc", "aspeed,ast2500";
>+	model = "Asrock Rack X470D4U-series BMC (64MB store)";

Nit: for consistency with how they spell it, and (at least *most* of) 
the other aspeed-bmc-asrock-*.dts files, I'd suggest "ASRock" instead of 
"Asrock".  (And IMO s/store/flash/ would be a touch clearer.)

Also, looks like the other nearby DTS files pretty consistently have 
compatible & model in the opposite order, so matching that might be nice 
too.

>+};
>+
>+&fmc {
>+	flash@0 {
>+		/delete-node/partitions;
>+#include "openbmc-flash-layout-64.dtsi"
>+	};
>+};
>diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-x470d4u.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-x470d4u.dts
>new file mode 100644
>index 000000000000..80fb2b7c1e0c
>--- /dev/null
>+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-x470d4u.dts

<snip>

>+
>+	fan@3 {
>+		/* FAN4 (6-pin) */
>+		reg = <0x03>;
>+		aspeed,fan-tach-ch = /bits/ 8 <0x03 0x0b>;
>+	};
>+
>+	fan@4 {
>+		/* FAN5 (6-pin) */
>+		reg = <0x04>;
>+		aspeed,fan-tach-ch = /bits/ 8 <0x04 0x0d>;
>+	};
>+
>+	fan@5 {
>+		/* FAN6 (6-pin) */
>+		reg = <0x05>;
>+		aspeed,fan-tach-ch = /bits/ 8 <0x05 0x0e>;
>+	};
>+};

Just to confirm, skipping channel 0xc here is intentional I assume?  
(Most other related platforms have them contiguously numbered, but not 
all, so another slight oddity wouldn't be too shocking.)


Thanks,
Zev