Adding workaround for nrf52 anomaly 89

doing exactly what is written here: https://infocenter.nordicsemi.com/topic/errata_nRF52832_Rev2/ERR/nRF52832/Rev2/latest/anomaly_832_89.html
zephyrproject-rtos · Oct 9, 2024 · eaf0d17 · eaf0d17
1 parent ab5cb2e
commit eaf0d17
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Showing 3 changed files with 17 additions and 1 deletion.
diff --git a/nrfx/drivers/src/nrfx_twim.c b/nrfx/drivers/src/nrfx_twim.c
@@ -412,6 +412,11 @@ void nrfx_twim_disable(nrfx_twim_t const * p_instance)
 
     p_cb->int_mask = 0;
     nrfy_twim_stop(p_instance->p_twim);
+#if NRFX_CHECK(NRFX_TWIM_NRF52_ANOMALY_89_WORKAROUND_ENABLED)
+    p_instance->p_twim->POWER = 0;
+    p_instance->p_twim->POWER;
+    p_instance->p_twim->POWER = 1;
+#endif
     p_cb->state = NRFX_DRV_STATE_INITIALIZED;
     p_cb->busy = false;
     NRFX_LOG_INFO("Instance disabled: %d.", p_instance->drv_inst_idx);

diff --git a/nrfx/mdk/nrf52.h b/nrfx/mdk/nrf52.h
@@ -1339,7 +1339,9 @@ typedef struct {                                /*!< (@ 0x40003000) TWIM0 Struct
   __IOM TWIM_TXD_Type TXD;                      /*!< (@ 0x00000544) TXD EasyDMA channel                                        */
   __IM  uint32_t  RESERVED14[13];
   __IOM uint32_t  ADDRESS;                      /*!< (@ 0x00000588) Address used in the TWI transfer                           */
-} NRF_TWIM_Type;                                /*!< Size = 1420 (0x58c)                                                       */
+  __IM  uint32_t  RESERVED15[668];
+  __IOM uint32_t  POWER;                        /*!< (@ 0x00000FFC) Peripheral power control                                   */
+} NRF_TWIM_Type;                                /*!< Size = 4096 (0x1000)                                                      */
 
 
 

diff --git a/nrfx/templates/nrfx_config_nrf52832.h b/nrfx/templates/nrfx_config_nrf52832.h
@@ -1353,6 +1353,15 @@
 #define NRFX_TWIM_NRF52_ANOMALY_109_WORKAROUND_ENABLED 0
 #endif
 
+/**
+ * @brief NRFX_TWIM_NRF52_ANOMALY_89_WORKAROUND_ENABLED - Enables nRF52 Anomaly 89 workaround for TWIM.
+ *
+ * Boolean. Accepted values 0 and 1.
+ */
+#ifndef NRFX_TWIM_NRF52_ANOMALY_89_WORKAROUND_ENABLED
+#define NRFX_TWIM_NRF52_ANOMALY_89_WORKAROUND_ENABLED 0
+#endif
+
 /**
  * @brief NRFX_TWIM_CONFIG_LOG_LEVEL
  *