mb/system76/darp7: Add System76 Darter Pro 7

https://tech-docs.system76.com/models/darp7/README.html

Tested with TianoCore (UefiPayloadPkg).

Working:

- PS/2 keyboard, touchpad
- Both DIMM slots
- M.2 NVMe SSD
- M.2 SATA SSD
- MicroSD card reader
- All USB ports
- USB-PD
- Webcam
- Ethernet
- WiFi/Bluetooth
- Integrated graphics using Intel GOP driver
- HDMI output
- DP over USB-C output
- Internal microphone
- Internal speakers
- Combined 3.5mm headphone/microphone jack
- S0ix suspend*
- Booting to Ubuntu Linux 21.04 and Windows 10
- Flashing with flashrom

Not working:

- S0ix when a device is attached to the TBT port

Not tested:

- Thunderbolt functionality

Change-Id: I80e5c5375f9d3881fc89a45a91ba68ed2e104a93
Signed-off-by: Jeremy Soller <jeremy@system76.com>
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52349
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

2 files changed, 66 insertions, 0 deletions

diff --git a/Documentation/mainboard/index.md b/Documentation/mainboard/index.md
index 2df07e1b18..f8bd466eba 100644
--- a/Documentation/mainboard/index.md
+++ b/Documentation/mainboard/index.md
@@ -180,6 +180,7 @@ The boards in this section are not real mainboards, but emulators.
 
 ## System76
 
+- [Darter Pro 7](system76/darp7.md)
 - [Galago Pro 5](system76/galp5.md)
 - [Gazelle 15](system76/gaze15.md)
 - [Lemur Pro 9](system76/lemp9.md)
diff --git a/Documentation/mainboard/system76/darp7.md b/Documentation/mainboard/system76/darp7.md
new file mode 100644
index 0000000000..d1dee864b9
--- /dev/null
+++ b/Documentation/mainboard/system76/darp7.md
@@ -0,0 +1,65 @@
+# System76 Darter Pro 7 (darp7)
+
+## Specs
+
+- CPU
+  - Intel Core i5-1135G7
+  - Intel Core i7-1165G7
+- EC
+  - ITE IT5570E running [System76 EC](https://github.com/system76/ec)
+- Graphics
+  - Intel Iris Xe Graphics
+  - eDP 15.6" 1920x1080@60Hz LCD
+  - 1x HDMI
+  - 1x DisplayPort 1.4 over USB-C
+- Memory
+  - Up to 64GB (2x32GB) dual-channel DDR4 SO-DIMMs @ 3200 MHz
+- Networking
+  - Gigabit Ethernet
+  - M.2 PCIe/CNVi Wifi/Bluetooth
+    - Intel Wi-Fi 6 AX200/201
+- Power
+  - 65W (19V, 3.42A) AC barrel adapter
+    - Included: Chicony A18-065N3A, using a C5 power cord
+  - USB-C charging, compatible with 65W+ chargers
+  - 73Wh 4-cell Lithium-ion battery
+- Sound
+  - Realtek ALC293 codec
+  - Internal speakers and microphone
+  - Combined 3.5mm headphone/microphone jack
+  - HDMI, USB-C DisplayPort audio
+- Storage
+  - M.2 PCIe NVMe Gen 4 SSD
+  - M.2 PCIe NVMe Gen 3 or SATA 3 SSD
+  - MicroSD card reader (RTS5227S)
+- USB
+  - 1x USB-C Type-C with Thunderbolt 4
+  - 1x USB 3.2 (Gen 2) Type-C
+  - 1x USB 3.2 (Gen 2) Type-A
+  - 1x USB 2.0 Type-A
+- Dimensions
+  - 1.99cm x 35.70cm x 22.05cm, 1.74kg
+
+## Flashing coreboot
+
+```eval_rst
++---------------------+---------------------+
+| Type                | Value               |
++=====================+=====================+
+| Socketed flash      | no                  |
++---------------------+---------------------+
+| Vendor              | GigaDevice          |
++---------------------+---------------------+
+| Model               | GD25B127D           |
++---------------------+---------------------+
+| Size                | 16 MiB              |
++---------------------+---------------------+
+| Package             | SOIC-8              |
++---------------------+---------------------+
+| Internal flashing   | yes                 |
++---------------------+---------------------+
+| External flashing   | yes                 |
++---------------------+---------------------+
+```
+
+The flash chip (U12) is above the left DIMM slot.