nrf52 GPIO: fix setting of SENSE to pins; clear LATCH register on initialization

arch/arm/src/nrf52/nrf52_gpio.c

@@ -184,7 +184,7 @@ static inline void nrf52_gpio_sense(nrf52_pinset_t cfgset,
     {
       regval |= GPIO_CNF_SENSE_HIGH;
     }
-  else
+  else if (mode == GPIO_SENSE_LOW)
     {
       regval |= GPIO_CNF_SENSE_LOW;
     }

arch/arm/src/nrf52/nrf52_gpiote.c

@@ -532,6 +532,14 @@ void nrf52_gpiote_set_task(uint32_t pinset, int channel,
 
 int nrf52_gpiote_init(void)
 {
+  /* Clear LATCH register(s) */
+
+  putreg32(0, NRF52_GPIO_P0_BASE + NRF52_GPIO_LATCH_OFFSET);
+
+#ifdef CONFIG_NRF52_HAVE_PORT1
+  putreg32(0, NRF52_GPIO_P1_BASE + NRF52_GPIO_LATCH_OFFSET);
+#endif
+
   /* Reset GPIOTE data */
 
   memset(&g_gpiote_ch_callbacks, 0, sizeof(g_gpiote_ch_callbacks));