soc: arm: nordic: handle nRF52832 anomaly 109

Enable workaround for anomaly 109 by default when affected peripherals
are enabled.

Signed-off-by: Jordan Yates <[email protected]>

Author: Jordan Yates

modules/hal_nordic/nrfx/nrfx_config.h

@@ -487,6 +487,13 @@
 #define NRFX_WDT1_ENABLED 1
 #endif
 
+#ifdef CONFIG_NRF52_ANOMALY_109_WORKAROUND
+#define NRFX_SPIM_NRF52_ANOMALY_109_WORKAROUND_ENABLED 1
+#define NRFX_SPIS_NRF52_ANOMALY_109_WORKAROUND_ENABLED 1
+#define NRFX_TWIM_NRF52_ANOMALY_109_WORKAROUND_ENABLED 1
+#define NRFX_PWM_NRF52_ANOMALY_109_WORKAROUND_ENABLED 1
+#endif
+
 #if defined(CONFIG_SOC_SERIES_BSIM_NRFXX)
 #include "nrfx_config_bsim.h"
 #endif

soc/arm/nordic_nrf/nrf52/CMakeLists.txt

@@ -14,3 +14,11 @@ zephyr_library_include_directories(
 if(CONFIG_SOC_NRF52832_ALLOW_SPIM_DESPITE_PAN_58 AND CONFIG_SPI_NRFX_SPIM)
   message(WARNING "Both SOC_NRF52832_ALLOW_SPIM_DESPITE_PAN_58 and an NRF SPIM driver are enabled, therefore PAN 58 will apply if RXD.MAXCNT == 1 and TXD.MAXCNT <= 1")
 endif()
+
+if(CONFIG_SOC_NRF52832)
+  if(NOT CONFIG_NRF52_ANOMALY_109_WORKAROUND)
+    if (CONFIG_NRFX_SPIS OR CONFIG_NRFX_SPIM OR CONFIG_NRFX_TWIM OR CONFIG_NRFX_PWM)
+      message(WARNING "NRF52_ANOMALY_109_WORKAROUND disabled with SPIS, SPIM, TWIM or PWM enabled. This will occasionally cause the first byte transmitted to be incorrect")
+    endif()
+  endif()
+endif()

soc/arm/nordic_nrf/nrf52/Kconfig.soc

@@ -129,4 +129,15 @@ config NRF52_ANOMALY_198_WORKAROUND
 	  This anomaly applies to IC revisions "Engineering B" up to "3", the most
 	  recent one.
 
+config NRF52_ANOMALY_109_WORKAROUND
+	bool "Anomaly 109 workaround"
+	default y
+	depends on SOC_NRF52832
+	depends on NRFX_SPIS || NRFX_SPIM || NRFX_TWIM || NRFX_PWM
+	help
+	  Due to Anomaly 109 the first byte sent out by these peripherals is
+	  sometimes wrong. This occurs when the system enters IDLE and stops the
+	  64MHz clock at the same time as the peripheral that is using DMA is started.
+	  This anomaly applies to IC revisions up to "3", the most recent one.
+
 endif # SOC_SERIES_NRF52X