From 6fc21458717a2ac6d14acdf9b665f993893f50a2 Mon Sep 17 00:00:00 2001
From: Michal Moskal <michal@moskal.me>
Date: Wed, 2 Dec 2020 10:55:00 +0100
Subject: [PATCH] Allow for power supply configuration

---
 src/boards/boards.c | 25 +++++++++++++++++++++++++
 src/boards/boards.h |  8 ++++++++
 2 files changed, 33 insertions(+)

diff --git a/src/boards/boards.c b/src/boards/boards.c
index e1ab96d3..bcf7b9ab 100644
--- a/src/boards/boards.c
+++ b/src/boards/boards.c
@@ -82,6 +82,31 @@ void board_init(void)
   neopixel_init();
 #endif
 
+#if ENABLE_DCDC_0 == 1
+  NRF_POWER->DCDCEN0 = 1;
+#endif
+#if ENABLE_DCDC_1 == 1
+  NRF_POWER->DCDCEN = 1;
+#endif
+
+// When board is supplied on VDDH (and not VDD), this specifies what voltage the GPIO should run at
+// and what voltage is output at VDD. The default (0xffffffff) is 1.8V; typically you'll want
+//     #define UICR_REGOUT0_VALUE UICR_REGOUT0_VOUT_3V3
+// in board.h when using that power configuration.
+#ifdef UICR_REGOUT0_VALUE
+  if (NRF_UICR->REGOUT0 != UICR_REGOUT0_VALUE) 
+  {
+      NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos;
+      while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
+      NRF_UICR->REGOUT0 = UICR_REGOUT0_VALUE;
+
+      NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos;
+      while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
+
+      NVIC_SystemReset();
+  }
+#endif
+
   // Init scheduler
   APP_SCHED_INIT(SCHED_MAX_EVENT_DATA_SIZE, SCHED_QUEUE_SIZE);
 
diff --git a/src/boards/boards.h b/src/boards/boards.h
index edc7666e..8aa0ece6 100644
--- a/src/boards/boards.h
+++ b/src/boards/boards.h
@@ -61,6 +61,14 @@
 #define BOARD_RGB_BRIGHTNESS 0x101010
 #endif
 
+// Power configuration - should we enable DC/DC converters? (requires inductors on board)
+#ifndef ENABLE_DCDC_0
+#define ENABLE_DCDC_0 0
+#endif
+#ifndef ENABLE_DCDC_1
+#define ENABLE_DCDC_1 0
+#endif
+
 // Helper function
 #define memclr(buffer, size)                memset(buffer, 0, size)
 #define varclr(_var)                        memclr(_var, sizeof(*(_var)))