From 9195ca3563e4a070167496b864e2366e917fb12f Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Sun, 4 Apr 2021 08:26:20 +0000
Subject: [PATCH] Added RT counter support to RP2 port.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@14133 27425a3e-05d8-49a3-a47f-9c15f0e5edd8
---
 demos/RP/RT-RP2040-PICO/cfg/chconf.h |  2 +-
 os/common/ports/ARMv6-M-RP2/chcore.h | 14 +++++++++++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/demos/RP/RT-RP2040-PICO/cfg/chconf.h b/demos/RP/RT-RP2040-PICO/cfg/chconf.h
index ab5b434f9..04c41a001 100644
--- a/demos/RP/RT-RP2040-PICO/cfg/chconf.h
+++ b/demos/RP/RT-RP2040-PICO/cfg/chconf.h
@@ -177,7 +177,7 @@
  * @note    The default is @p TRUE.
  */
 #if !defined(CH_CFG_USE_TM)
-#define CH_CFG_USE_TM                       FALSE
+#define CH_CFG_USE_TM                       TRUE
 #endif
 
 /**
diff --git a/os/common/ports/ARMv6-M-RP2/chcore.h b/os/common/ports/ARMv6-M-RP2/chcore.h
index 2f85735f1..9fc0f498b 100644
--- a/os/common/ports/ARMv6-M-RP2/chcore.h
+++ b/os/common/ports/ARMv6-M-RP2/chcore.h
@@ -63,7 +63,7 @@
  * @name    Port Capabilities and Constants
  * @{
  */
-#define PORT_SUPPORTS_RT                FALSE
+#define PORT_SUPPORTS_RT                TRUE
 
 /**
  * @brief   Natural alignment constant.
@@ -677,6 +677,18 @@ __STATIC_INLINE void port_wait_for_interrupt(void) {
 #endif
 }
 
+/**
+ * @brief   Returns the current value of the realtime counter.
+ * @note    In this port the RT counter is the same counter used for
+ *          system time in tick-less mode, resolution is always 1uS.
+ *
+ * @return              The realtime counter value.
+ */
+__STATIC_FORCEINLINE rtcnt_t port_rt_get_counter_value(void) {
+
+  return TIMER->TIMERAWL;
+}
+
 /**
  * @brief   Returns a core index.
  * @return              The core index.