From 839d27735fcb6bfc5da68edbf70efdffcde7f02e Mon Sep 17 00:00:00 2001
From: Christian Mauderer <christian.mauderer@embedded-brains.de>
Date: Thu, 20 Jul 2023 11:29:37 +0200
Subject: [PATCH] Add RTC driver for GRiSP Charger

---
 demo/init.c    | 23 +++++++++++++++++++++++
 external/rtems |  2 +-
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/demo/init.c b/demo/init.c
index c545e56..6d66e96 100644
--- a/demo/init.c
+++ b/demo/init.c
@@ -30,6 +30,7 @@
  */
 
 #undef EVENT_RECORDING
+#define RTC_ENABLED
 
 #include <assert.h>
 #include <stdlib.h>
@@ -45,6 +46,10 @@
 #include <rtems/stringto.h>
 #include <rtems/ftpd.h>
 #include <machine/rtems-bsd-commands.h>
+#ifdef RTC_ENABLED
+#include <libchip/rtc.h>
+#include <libchip/mcp7940m-rtc.h>
+#endif
 #ifdef EVENT_RECORDING
 #include <rtems/record.h>
 #include <rtems/recordserver.h>
@@ -259,6 +264,10 @@ Init(rtems_task_argument arg)
 	assert(rv == 0);
 #endif /* IS_GRISP2 */
 
+#ifdef RTC_ENABLED
+	setRealTimeToRTEMS();
+#endif
+
 	printf("Init EEPROM\n");
 	grisp_eeprom_init();
 	rv = grisp_eeprom_get(&eeprom);
@@ -307,6 +316,17 @@ Init(rtems_task_argument arg)
 	exit(0);
 }
 
+#ifdef RTC_ENABLED
+static struct mcp7940m_rtc rtc_ctx =
+	MCP7940M_RTC_INITIALIZER("/dev/i2c-1", 0x6f, false);
+
+rtc_tbl RTC_Table[] = {
+	MCP7940M_RTC_TBL_ENTRY("/dev/rtc", &rtc_ctx),
+};
+
+size_t RTC_Count = (sizeof(RTC_Table)/sizeof(rtc_tbl));
+#endif
+
 /*
  * Configure LibBSD.
  */
@@ -321,6 +341,9 @@ Init(rtems_task_argument arg)
  */
 #define CONFIGURE_MICROSECONDS_PER_TICK 10000
 
+#ifdef RTC_ENABLED
+#define CONFIGURE_APPLICATION_NEEDS_RTC_DRIVER
+#endif
 #define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
 #define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
 #define CONFIGURE_APPLICATION_NEEDS_STUB_DRIVER
diff --git a/external/rtems b/external/rtems
index 0fe6bd6..2af970e 160000
--- a/external/rtems
+++ b/external/rtems
@@ -1 +1 @@
-Subproject commit 0fe6bd64cf9943e1fe9afa14aa4b3185cbea0735
+Subproject commit 2af970e8d3bbfc9e3dc41de9b6ca453acb6d55da