Removed PA_27 from si_trx, use a lf timer instead

firmware/inc/hw_config.h

@@ -178,7 +178,6 @@
 #define SI4xxx_IRQ_PIN		PIN_PA24
 #define SI4xxx_IRQ_PINMUX	PINMUX_PA24A_EIC_EXTINT12
 #define SI4xxx_SDN_PIN		PIN_PA17
-#define SI4xxx_GPIO0_PIN	PIN_PA27
 #define SI4xxx_GPIO1_PIN	PIN_PA25
 #define SI4xxx_GPIO1_PINMUX	PINMUX_PA25F_TC5_WO1
 #define SI4xxx_TCXO_FREQUENCY	16369000
@@ -200,6 +199,8 @@
  * LF Clock
  */
 #define USE_LFTIMER		0
+#define LFTIMER_GCLKIO_0_PIN	PIN_PA27
+#define LFTIMER_GCLKIO_0_PINMUX	PINMUX_PA27H_GCLK_IO0
 
 /**
  * HF Clock

firmware/src/xosc.c

@@ -156,6 +156,15 @@ void gclk0_to_hf_clock(void)
  */
 void gclk0_to_lf_clock(void)
 {
+#if USE_LFTIMER
+  /* Configure GCLK_IO[0] pin */
+  system_pinmux_pin_set_config(LFTIMER_GCLKIO_0_PINMUX >> 16,
+                               LFTIMER_GCLKIO_0_PINMUX & 0xFFFF,
+                               SYSTEM_PINMUX_PIN_DIR_INPUT,
+                               SYSTEM_PINMUX_PIN_PULL_NONE,
+                               true);
+#endif
+
   /* Configure GCLK0 to GCLK_IO[0] / OSCULP32K */
   system_gclk_gen_set_config(GCLK_GENERATOR_0,
 #if USE_LFTIMER