drivers: counter: gecko: Add SYSRTC stimer support

SiLabs' sleeptimer driver supports several hardware peripherals, of
which the counter driver so far only supports the RTCC-based variant.

This patch adds support for the SYSRTC-based sleeptimer implementation,
which is required for Gecko SoCs that do not have an RTCC module.

Signed-off-by: Markus Fuchs <markus.fuchs@ch.sauter-bc.com>

drivers/counter/Kconfig.gecko

@@ -18,6 +18,7 @@ config COUNTER_GECKO_STIMER
 	default y
 	depends on DT_HAS_SILABS_GECKO_STIMER_ENABLED
 	select SOC_GECKO_RTCC
+	select SOC_GECKO_PRS
 	help
 	  Enable the counter driver for Sleep Timer module for Silicon Labs
 	  Gecko chips.

drivers/counter/counter_gecko_stimer.c

@@ -18,10 +18,20 @@
 #include <em_cmu.h>
 #include <sl_atomic.h>
 #include <sl_sleeptimer.h>
+#include <sli_sleeptimer_hal.h>
 
 LOG_MODULE_REGISTER(counter_gecko, CONFIG_COUNTER_LOG_LEVEL);
 
-#define STIMER_MAX_VALUE (_RTCC_CNT_MASK)
+#if SL_SLEEPTIMER_PERIPHERAL == SL_SLEEPTIMER_PERIPHERAL_RTCC
+#define STIMER_IRQ_HANDLER RTCC_IRQHandler
+#define STIMER_MAX_VALUE _RTCC_CNT_MASK
+#elif SL_SLEEPTIMER_PERIPHERAL == SL_SLEEPTIMER_PERIPHERAL_SYSRTC
+#define STIMER_IRQ_HANDLER SYSRTC_APP_IRQHandler
+#define STIMER_MAX_VALUE _SYSRTC_CNT_MASK
+#else
+#error "Unsupported sleep timer peripheral"
+#endif
+
 #define STIMER_ALARM_NUM 2
 
 struct counter_gecko_config {
@@ -270,7 +280,7 @@ BUILD_ASSERT((DT_INST_PROP(0, prescaler) > 0U) && (DT_INST_PROP(0, prescaler) <=
 
 static void counter_gecko_0_irq_config(void)
 {
-	IRQ_DIRECT_CONNECT(DT_INST_IRQN(0), DT_INST_IRQ(0, priority), RTCC_IRQHandler, 0);
+	IRQ_DIRECT_CONNECT(DT_INST_IRQN(0), DT_INST_IRQ(0, priority), STIMER_IRQ_HANDLER, 0);
 	irq_enable(DT_INST_IRQN(0));
 }
 

soc/arm/silabs_exx32/Kconfig

@@ -199,8 +199,8 @@ config SOC_GECKO_DEV_INIT
 config COUNTER_GECKO_STIMER
 	bool
 	help
-	  Enable counter driver based on RTCC module for Silicon Labs Gecko
-	  chips.
+	  Enable counter driver based on the Sleep Timer driver for Silicon Labs
+	  Gecko chips.
 
 config SOC_GECKO_CMU
 	bool

west.yml

@@ -219,7 +219,7 @@ manifest:
       groups:
         - hal
     - name: hal_silabs
-      revision: fbb47a4067c460a2c26917ff34189fb4f32f654f
+      revision: d184c2ccc0ec5a7189d6d5cb7645c7f9bd38c2b5
       path: modules/hal/silabs
       groups:
         - hal