feat(PeriphDrivers): Enable sysclk-div for MAX78002 (#1170)

Signed-off-by: Furkan Akkiz <[email protected]>

Author: hfakkiz

Libraries/PeriphDrivers/Include/MAX78002/mxc_sys.h

@@ -187,6 +187,17 @@ typedef enum {
         MXC_V_GCR_CLKCTRL_SYSCLK_SEL_EXTCLK /**< Use the external system clock input. */
 } mxc_sys_system_clock_t;
 
+typedef enum {
+    MXC_SYS_CLOCK_DIV_1 = MXC_S_GCR_CLKCTRL_SYSCLK_DIV_DIV1,
+    MXC_SYS_CLOCK_DIV_2 = MXC_S_GCR_CLKCTRL_SYSCLK_DIV_DIV2,
+    MXC_SYS_CLOCK_DIV_4 = MXC_S_GCR_CLKCTRL_SYSCLK_DIV_DIV4,
+    MXC_SYS_CLOCK_DIV_8 = MXC_S_GCR_CLKCTRL_SYSCLK_DIV_DIV8,
+    MXC_SYS_CLOCK_DIV_16 = MXC_S_GCR_CLKCTRL_SYSCLK_DIV_DIV16,
+    MXC_SYS_CLOCK_DIV_32 = MXC_S_GCR_CLKCTRL_SYSCLK_DIV_DIV32,
+    MXC_SYS_CLOCK_DIV_64 = MXC_S_GCR_CLKCTRL_SYSCLK_DIV_DIV64,
+    MXC_SYS_CLOCK_DIV_128 = MXC_S_GCR_CLKCTRL_SYSCLK_DIV_DIV128
+} mxc_sys_system_clock_div_t;
+
 #define MXC_SYS_USN_CHECKSUM_LEN 16 // Length of the USN + padding for checksum compute
 #define MXC_SYS_USN_CSUM_FIELD_LEN 2 // Size of the checksum field in the USN
 #define MXC_SYS_USN_LEN 13 // Size of the USN including the checksum
@@ -355,6 +366,18 @@ int MXC_SYS_ClockSourceDisable(mxc_sys_system_clock_t clock);
  */
 int MXC_SYS_Clock_Select(mxc_sys_system_clock_t clock);
 
+/**
+ * @brief Set the system clock divider.
+ * @param div       Enumeration for desired clock divider.
+ */
+void MXC_SYS_SetClockDiv(mxc_sys_system_clock_div_t div);
+
+/**
+ * @brief Get the system clock divider.
+ * @returns         System clock divider.
+ */
+mxc_sys_system_clock_div_t MXC_SYS_GetClockDiv(void);
+
 /**
  * @brief Wait for a clock to enable with timeout
  * @param      ready The clock to wait for

Libraries/PeriphDrivers/Source/SYS/sys_ai87.c

@@ -502,6 +502,25 @@ int MXC_SYS_Clock_Select(mxc_sys_system_clock_t clock)
     return E_NO_ERROR;
 }
 
+/* ************************************************************************** */
+void MXC_SYS_SetClockDiv(mxc_sys_system_clock_div_t div)
+{
+    /* Return if this setting is already current */
+    if (div == MXC_SYS_GetClockDiv()) {
+        return;
+    }
+
+    MXC_SETFIELD(MXC_GCR->clkctrl, MXC_F_GCR_CLKCTRL_SYSCLK_DIV, div);
+
+    SystemCoreClockUpdate();
+}
+
+/* ************************************************************************** */
+mxc_sys_system_clock_div_t MXC_SYS_GetClockDiv(void)
+{
+    return (MXC_GCR->clkctrl & MXC_F_GCR_CLKCTRL_SYSCLK_DIV);
+}
+
 /* ************************************************************************** */
 void MXC_SYS_Reset_Periph(mxc_sys_reset_t reset)
 {