Add tzarc/ghoul. (#18562)

Co-authored-by: Joel Challis <git@zvecr.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>

keyboards/tzarc/ghoul/rev1/rp2040/config.h

@@ -0,0 +1,39 @@
+// Copyright 2018-2022 Nick Brassel (@tzarc)
+// SPDX-License-Identifier: GPL-3.0-or-later
+#pragma once
+
+#include "config_common.h"
+
+// Matrix configuration
+#define SPI_MATRIX_CHIP_SELECT_PIN GP21
+#define SPI_MATRIX_DIVISOR 16
+
+// Encoder
+#define ENCODER_PUSHBUTTON_PIN GP7
+
+// SPI Configuration
+#define SPI_DRIVER SPID0
+#define SPI_SCK_PIN GP22
+#define SPI_MOSI_PIN GP23
+#define SPI_MISO_PIN GP20
+
+// EEPROM configuration
+#define EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR 8
+#define EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN GP3
+#define EXTERNAL_FLASH_SPI_CLOCK_DIVISOR 8
+#define EXTERNAL_FLASH_SPI_SLAVE_SELECT_PIN GP2
+
+// RGB configuration
+#define RGB_DI_PIN GP13
+#define RGB_ENABLE_PIN GP6
+
+// ADC Configuration
+#define ADC_RESOLUTION ? ? ? // ADC_CFGR1_RES_12BIT // TBD when RP2040 has analog support
+#define ADC_SATURATION ? ? ? // ((1 << 12) - 1) // TBD when RP2040 has analog support
+#define ADC_CURRENT_PIN GP26
+#define ADC_VOLTAGE_PIN GP27
+
+// Display Configuration
+#define OLED_CS_PIN GP16
+#define OLED_DC_PIN GP17
+#define OLED_RST_PIN GP18

keyboards/tzarc/ghoul/rev1/rp2040/halconf.h

@@ -0,0 +1,8 @@
+// Copyright 2018-2022 Nick Brassel (@tzarc)
+// SPDX-License-Identifier: GPL-3.0-or-later
+#pragma once
+
+//#define HAL_USE_ADC TRUE
+#define HAL_USE_SPI TRUE
+
+#include_next <halconf.h>

keyboards/tzarc/ghoul/rev1/rp2040/info.json

@@ -0,0 +1,15 @@
+{
+  "keyboard_name": "Ghoul_RP2040",
+  "processor": "RP2040",
+  "bootloader": "rp2040",
+  "bootloader_instructions": "Hold the boot switch and tap the reset switch, or hold the top-left key when plugging in the board.",
+  "encoder": {
+    "rotary": [
+      {
+        "pin_a": "GP8",
+        "pin_b": "GP5",
+        "resolution": 2
+      }
+    ]
+  }
+}

keyboards/tzarc/ghoul/rev1/rp2040/mcuconf.h

@@ -0,0 +1,13 @@
+// Copyright 2018-2022 Nick Brassel (@tzarc)
+// SPDX-License-Identifier: GPL-3.0-or-later
+#pragma once
+
+#include_next <mcuconf.h>
+
+// Used for RGB
+//#undef RP_ADC_USE_ADC1
+//#define RP_ADC_USE_ADC1 TRUE
+
+// Used for EEPROM
+#undef RP_SPI_USE_SPI0
+#define RP_SPI_USE_SPI0 TRUE

keyboards/tzarc/ghoul/rev1/rp2040/rules.mk

@@ -0,0 +1 @@
+WS2812_DRIVER = vendor