From 738a3645b126e7e48ae2964eab7d08ed4103e17b Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Wed, 10 Aug 2022 08:44:27 +0000
Subject: [PATCH] Fixes in idle handling.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@15718 27425a3e-05d8-49a3-a47f-9c15f0e5edd8
---
 os/hal/ports/RP/LLD/UARTv1/hal_sio_lld.c | 4 ++--
 os/hal/ports/RP/LLD/UARTv1/hal_sio_lld.h | 3 ++-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/os/hal/ports/RP/LLD/UARTv1/hal_sio_lld.c b/os/hal/ports/RP/LLD/UARTv1/hal_sio_lld.c
index c3bfe1f28..a324673a2 100644
--- a/os/hal/ports/RP/LLD/UARTv1/hal_sio_lld.c
+++ b/os/hal/ports/RP/LLD/UARTv1/hal_sio_lld.c
@@ -532,7 +532,7 @@ void sio_lld_serve_interrupt(SIODriver *siop) {
 #if SIO_USE_SYNCHRONIZATION
       /* The idle flag is forcibly cleared when an RX error event is
          detected.*/
-      imsc &= ~UART_UARTIMSC_RTIM;
+      u->UARTICR = UART_UARTICR_RTIC;
 #endif
 
       /* Disabling event sources.*/
@@ -564,7 +564,7 @@ void sio_lld_serve_interrupt(SIODriver *siop) {
 #if SIO_USE_SYNCHRONIZATION
       /* The idle flag is forcibly cleared when an RX data event is
          detected.*/
-      imsc &= ~UART_UARTIMSC_RTIM;
+      u->UARTICR = UART_UARTICR_RTIC;
 #endif
 
       /* Called once then the interrupt source is disabled.*/
diff --git a/os/hal/ports/RP/LLD/UARTv1/hal_sio_lld.h b/os/hal/ports/RP/LLD/UARTv1/hal_sio_lld.h
index cadaccc84..229a383a4 100644
--- a/os/hal/ports/RP/LLD/UARTv1/hal_sio_lld.h
+++ b/os/hal/ports/RP/LLD/UARTv1/hal_sio_lld.h
@@ -149,7 +149,8 @@
  *
  * @notapi
  */
-#define sio_lld_is_rx_idle(siop) true
+#define sio_lld_is_rx_idle(siop)                                            \
+  (bool)(((siop)->uart->UARTRIS & UART_UARTRIS_RTRIS) != 0U)
 
 /**
  * @brief   Determines if RX has pending error events to be read and cleared.