esb: Fix DPPIC instance selection for nRF54 SoCs

So far when building for nRF54L15 static DPPI channels were assigned.
After adding nRF54L15 support in the DPPI driver this code is unused
for nRF54L15 and the common DPPI allocator used hardcoded DPPIC
instance. This commit parameterizes the DDPIC instance number depending
on the SoC and enables the coresponding instances in the ESB samples'
configurations. ESB uses hardcoded instance number per SoC.

TODO: Allow selection of the DPPIC instance in one place e.g. Kconfig
based on the DTS.

Signed-off-by: Michał Grochala <[email protected]>

Author: grochu

samples/esb/esb_prx/boards/nrf54l15dk_nrf54l15_cpuapp.conf

@@ -0,0 +1,8 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+# Enable DPPI driver
+CONFIG_NRFX_DPPI10=y

samples/esb/esb_ptx/boards/nrf54l15dk_nrf54l15_cpuapp.conf

@@ -0,0 +1,8 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+# Enable DPPI driver
+CONFIG_NRFX_DPPI10=y

subsys/esb/esb_dppi.c

@@ -217,7 +217,7 @@ int esb_ppi_init(void)
 
 #else
 
-	nrfx_dppi_t dppi = NRFX_DPPI_INSTANCE(0);
+	nrfx_dppi_t dppi = NRFX_DPPI_INSTANCE(ESB_DPPIC_INSTANCE_NO);
 
 	err = nrfx_dppi_channel_alloc(&dppi, &radio_address_timer_stop);
 	if (err != NRFX_SUCCESS) {
@@ -309,7 +309,7 @@ void esb_ppi_deinit(void)
 
 #else
 
-	nrfx_dppi_t dppi = NRFX_DPPI_INSTANCE(0);
+	nrfx_dppi_t dppi = NRFX_DPPI_INSTANCE(ESB_DPPIC_INSTANCE_NO);
 
 	err = nrfx_dppi_channel_free(&dppi, radio_address_timer_stop);
 	if (err != NRFX_SUCCESS) {

subsys/esb/esb_peripherals.h

@@ -26,8 +26,8 @@ extern "C" {
 	/** The ESB Radio interrupt number. */
 	#define ESB_RADIO_IRQ_NUMBER RADIO_0_IRQn
 
-	/** DPPIC instance used by ESB. */
-	#define ESB_DPPIC NRF_DPPIC020
+	/** DPPIC instance number used by ESB. */
+	#define ESB_DPPIC_INSTANCE_NO 020
 
 	/** ESB EGU instance configuration. */
 	#define ESB_EGU NRF_EGU020
@@ -47,8 +47,8 @@ extern "C" {
 	/** The ESB Radio interrupt number. */
 	#define ESB_RADIO_IRQ_NUMBER RADIO_0_IRQn
 
-	/** DPPIC instance used by ESB. */
-	#define ESB_DPPIC NRF_DPPIC10
+	/** DPPIC instance number used by ESB. */
+	#define ESB_DPPIC_INSTANCE_NO 10
 
 	/** ESB EGU instance configuration. */
 	#define ESB_EGU NRF_EGU10
@@ -66,8 +66,8 @@ extern "C" {
 	/** The ESB Radio interrupt number. */
 	#define ESB_RADIO_IRQ_NUMBER RADIO_IRQn
 
-	/** DPPIC instance used by ESB. */
-	#define ESB_DPPIC NRF_DPPIC
+	/** DPPIC instance number used by ESB. */
+	#define ESB_DPPIC_INSTANCE_NO 0
 
 	/** ESB EGU instance configuration. */
 	#define ESB_EGU NRF_EGU0
@@ -80,6 +80,13 @@ extern "C" {
 
 #endif
 
+/** ESB DPPIC instance number. */
+#if ESB_DPPIC_INSTANCE_NO
+#define ESB_DPPIC NRFX_CONCAT_2(NRF_DPPIC, ESB_DPPIC_INSTANCE_NO)
+#else
+#define ESB_DPPIC NRF_DPPIC
+#endif /* ESB_DPPIC_INSTANCE_NO */
+
 /** ESB timer instance number. */
 #if defined(CONFIG_ESB_SYS_TIMER_INSTANCE_LEADING_ZERO)
 #define ESB_TIMER_INSTANCE_NO NRFX_CONCAT_2(0, CONFIG_ESB_SYS_TIMER_INSTANCE)