mb/asrock/b75m-itx: Add Sandy/Ivy Bridge board B75M-ITX

This board is based off b75pro3-m, which is very similar.  Compared to
it, it just lacks a COM1 header, and the secondary ASMedia SATA3
controller.

Tested with:
CPUs:
- Core i5-3330
- Core i5-3470
- Core i7-3770

RAM:
- single bank 4GB CL11
- two banks 4+4GB CL9
- two banks 8+8GB CL10

OS:
- Gentoo Linux LiveUSB, KDE desktop (Linux 5.15.72)

Working:
- GRUB2 payload with embedded default config for boot from USB, disk
- UEFI EDK2 payload
- Intel ME stripped
- Native raminit
- Integrated graphics with libgfxinit (HDMI, DVI and VGA)
- (boot from) SATA2, SATA3, ports
- Rear USB 2 and 3 ports (supports boot)
- Internal USB 3.0 ports
- Realtek GbE NIC
- 2.0 channel audio via lineout jack output
- ACPI (power button triggers OS event)

Untested:
- Internal USB 2.0 ports
- eSATA port
- 7.1 channel audio

Signed-off-by: Fabian Groffen <grobian@gentoo.org>
Change-Id: Ia6a6eb3e922920f4afbcb7828cd2b779b9caebcb
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73097
Reviewed-by: Kevin Keijzer
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <felixsinger@posteo.net>

3 files changed, 16 insertions, 0 deletions

diff --git a/src/mainboard/asrock/b75m-itx/acpi/ec.asl b/src/mainboard/asrock/b75m-itx/acpi/ec.asl
new file mode 100644
index 0000000000..16990d45f4
--- /dev/null
+++ b/src/mainboard/asrock/b75m-itx/acpi/ec.asl
@@ -0,0 +1,3 @@
+/* SPDX-License-Identifier: CC-PDDC */
+
+/* Please update the license if adding licensable material. */
diff --git a/src/mainboard/asrock/b75m-itx/acpi/platform.asl b/src/mainboard/asrock/b75m-itx/acpi/platform.asl
new file mode 100644
index 0000000000..7b1b2b2975
--- /dev/null
+++ b/src/mainboard/asrock/b75m-itx/acpi/platform.asl
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+Method(_WAK,1)
+{
+	Return(Package(){0,0})
+}
+
+Method(_PTS,1)
+{
+}
diff --git a/src/mainboard/asrock/b75m-itx/acpi/superio.asl b/src/mainboard/asrock/b75m-itx/acpi/superio.asl
new file mode 100644
index 0000000000..ee2eabeb75
--- /dev/null
+++ b/src/mainboard/asrock/b75m-itx/acpi/superio.asl
@@ -0,0 +1,3 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <drivers/pc80/pc/ps2_controller.asl>