esb: Add HMPAN-229 workaround

Add HMPAN-229 workaround for nRF54H20.

Jira: NCSDK-35962

Signed-off-by: Dominik Chat <[email protected]>

Author: dchat-nordic

doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst

@@ -210,11 +210,15 @@ DECT NR+
 Enhanced ShockBurst (ESB)
 -------------------------
 
-* Added the :ref:`esb_monitor_mode` feature.
-* Added experimental support for the nRF54LV10A SoC in the following samples:
+* Added:
+
+  * The :ref:`esb_monitor_mode` feature.
+  * Experimental support for the nRF54LV10A SoC in the following samples:
+
+    * :ref:`esb_prx`
+    * :ref:`esb_ptx`
 
-  * :ref:`esb_prx`
-  * :ref:`esb_ptx`
+  * A workaround for the hardware errata HMPAN-229 for the nRF54H20 SoC.
 
 Gazell
 ------

subsys/esb/esb.c

@@ -483,8 +483,12 @@ static void apply_radio_init_workarounds(void)
 		*(volatile uint32_t *)0x5302C74C = *(volatile uint32_t *)0x0FFFE468;
 	}
 
-	if (*(volatile uint32_t *)0x0FFFE46C != TRIM_VALUE_EMPTY) {
+	/* HMPAN-229 provides hardcoded value if the trim value is 0 */
+	if ((*(volatile uint32_t *)0x0FFFE46C != TRIM_VALUE_EMPTY) &&
+							(*(volatile uint32_t *)0x0FFFE46C != 0)) {
 		*(volatile uint32_t *)0x5302C7D8 = *(volatile uint32_t *)0x0FFFE46C;
+	} else {
+		*(volatile uint32_t *)0x5302C7D8 = 0x00000004;
 	}
 
 	if (*(volatile uint32_t *)0x0FFFE470 != TRIM_VALUE_EMPTY) {