da1469x/clock: Add missing services

This commit adds the missing services to the driver API. It also makes the
actual calibration of the XTAL32K clock a syscfg option, defaulting to 0.

hw/mcu/dialog/da1469x/include/mcu/da1469x_clock.h

@@ -61,6 +61,21 @@ void da1469x_clock_sys_xtal32m_switch_safe(void);
  */
 void da1469x_clock_sys_rc32m_disable(void);
 
+/**
+ * Enable RC32M
+ */
+void da1469x_clock_sys_rc32m_enable(void);
+
+/**
+ * Switch sys_clk to RC32M
+ */
+void da1469x_clock_sys_rc32m_switch(void);
+
+/**
+ * Disable XTAL32K
+ */
+void da1469x_clock_lp_xtal32k_disable(void);
+
 /**
  * Enable XTAL32K
  */
@@ -73,6 +88,21 @@ void da1469x_clock_lp_xtal32k_enable(void);
  */
 void da1469x_clock_lp_xtal32k_switch(void);
 
+/**
+ * Disable RC32K
+ */
+void da1469x_clock_lp_rc32k_disable(void);
+
+/**
+ * Enable RC32K
+ */
+void da1469x_clock_lp_rc32k_enable(void);
+
+/**
+ * Switch lp_clk to RC32K
+ */
+void da1469x_clock_lp_rc32k_switch(void);
+
 /**
  * Enable RCX
  */
@@ -95,6 +125,11 @@ void da1469x_clock_lp_rcx_calibrate(void);
  */
 void da1469x_clock_lp_rc32k_calibrate(void);
 
+/**
+ * Calibrate XTAL32K
+ */
+void da1469x_clock_lp_xtal32k_calibrate(void);
+
 /**
  * Calibrate RC32M
  */
@@ -110,6 +145,11 @@ uint32_t da1469x_clock_lp_rcx_freq_get(void);
  */
 uint32_t da1469x_clock_lp_rc32k_freq_get(void);
 
+/**
+ * Get calibrated XTAL32K frequency
+ */
+uint32_t da1469x_clock_lp_xtal32k_freq_get(void);
+
 /**
  * Get calibrated (measured) RC32M frequency
  */

hw/mcu/dialog/da1469x/src/da1469x_clock.c

@@ -34,7 +34,8 @@
 
 static uint32_t g_mcu_clock_rcx_freq;
 static uint32_t g_mcu_clock_rc32k_freq;
-static uint32_t g_mcu_clock_rc32m_freq;
+static uint32_t g_mcu_clock_rc32m_freq = RC32M_FREQ;
+static uint32_t g_mcu_clock_xtal32k_freq;
 
 uint32_t SystemCoreClock = RC32M_FREQ;
 
@@ -129,6 +130,30 @@ da1469x_clock_sys_rc32m_disable(void)
     CRG_TOP->CLK_RC32M_REG &= ~CRG_TOP_CLK_RC32M_REG_RC32M_ENABLE_Msk;
 }
 
+void
+da1469x_clock_sys_rc32m_enable(void)
+{
+    CRG_TOP->CLK_RC32M_REG |= CRG_TOP_CLK_RC32M_REG_RC32M_ENABLE_Msk;
+}
+
+void
+da1469x_clock_sys_rc32m_switch(void)
+{
+    CRG_TOP->CLK_CTRL_REG = (CRG_TOP->CLK_CTRL_REG &
+                             ~CRG_TOP_CLK_CTRL_REG_SYS_CLK_SEL_Msk) |
+                            (1 << CRG_TOP_CLK_CTRL_REG_SYS_CLK_SEL_Pos);
+
+    while (!(CRG_TOP->CLK_CTRL_REG & CRG_TOP_CLK_CTRL_REG_RUNNING_AT_RC32M_Msk));
+
+    SystemCoreClock = g_mcu_clock_rc32m_freq;
+}
+
+void
+da1469x_clock_lp_xtal32k_disable(void)
+{
+    CRG_TOP->CLK_XTAL32K_REG &= ~CRG_TOP_CLK_XTAL32K_REG_XTAL32K_ENABLE_Msk;
+}
+
 void
 da1469x_clock_lp_xtal32k_enable(void)
 {
@@ -147,6 +172,31 @@ da1469x_clock_lp_xtal32k_switch(void)
     }
 }
 
+void
+da1469x_clock_lp_rc32k_disable(void)
+{
+    CRG_TOP->CLK_RC32K_REG &= ~CRG_TOP_CLK_RC32K_REG_RC32K_ENABLE_Msk;
+}
+
+void
+da1469x_clock_lp_rc32k_enable(void)
+{
+    CRG_TOP->CLK_RC32K_REG |= CRG_TOP_CLK_RC32K_REG_RC32K_ENABLE_Msk;
+}
+
+void
+da1469x_clock_lp_rc32k_switch(void)
+{
+    CRG_TOP->CLK_CTRL_REG = (CRG_TOP->CLK_CTRL_REG &
+                             ~CRG_TOP_CLK_CTRL_REG_LP_CLK_SEL_Msk) |
+                            (0 << CRG_TOP_CLK_CTRL_REG_LP_CLK_SEL_Pos);
+
+    /* If system is running on LP clock update SystemCoreClock */
+    if (CRG_TOP->CLK_CTRL_REG & CRG_TOP_CLK_CTRL_REG_RUNNING_AT_LP_CLK_Msk) {
+        SystemCoreClock = g_mcu_clock_rc32k_freq;
+    }
+}
+
 void
 da1469x_clock_lp_rcx_enable(void)
 {
@@ -286,6 +336,17 @@ da1469x_clock_lp_rc32k_calibrate(void)
     g_mcu_clock_rc32k_freq = freq;
 }
 
+void
+da1469x_clock_lp_xtal32k_calibrate(void)
+{
+#if MYNEWT_VAL(MCU_CLOCK_XTAL32K_ALLOW_CALIB)
+    g_mcu_clock_xtal32k_freq =
+        da1469x_clock_calibrate(2, MYNEWT_VAL(MCU_CLOCK_RCX_CAL_REF_CNT));
+#else
+    g_mcu_clock_xtal32k_freq = XTAL32K_FREQ;
+#endif
+}
+
 void
 da1469x_clock_lp_rc32m_calibrate(void)
 {
@@ -308,6 +369,14 @@ da1469x_clock_lp_rc32k_freq_get(void)
     return g_mcu_clock_rc32k_freq;
 }
 
+uint32_t
+da1469x_clock_lp_xtal32k_freq_get(void)
+{
+    assert(g_mcu_clock_xtal32k_freq);
+
+    return g_mcu_clock_xtal32k_freq;
+}
+
 uint32_t
 da1469x_clock_lp_rc32m_freq_get(void)
 {

hw/mcu/dialog/da1469x/syscfg.yml

@@ -67,6 +67,11 @@ syscfg.defs:
             Specifies settling time [ms] of 32K crystal oscillator.
         value: 8000
 
+    MCU_CLOCK_XTAL32K_ALLOW_CALIB:
+        description: >
+            Specifies that the 32K crystal oscillator should be calibrated.
+        value: 0
+
     MCU_CLOCK_RCX_CAL_REF_CNT:
         description: >
             Reference count value for calibration of RCX clock. The higher