Move left/src/init_clock.[ch] to shared/slave

shared/slave/init_clock.c

@@ -0,0 +1,34 @@
+#include "fsl_common.h"
+
+extern uint32_t SystemCoreClock; // System clock frequency.
+
+// How to setup clock using clock driver functions:
+// 1. CLOCK_SetSimSafeDivs, to make sure core clock, bus clock, flexbus clock
+//    and flash clock are in allowed range during clock mode switch.
+// 2. Call CLOCK_SetMcgliteConfig to set MCG_Lite configuration.
+// 3. Call CLOCK_SetSimConfig to set the clock configuration in SIM.
+
+void InitClock(void)
+{
+    // Core clock: 48MHz
+    // Bus clock: 24MHz
+    const mcglite_config_t mcgliteConfig = {
+        .outSrc = kMCGLITE_ClkSrcHirc,
+        .irclkEnableMode = 0U,
+        .ircs = kMCGLITE_Lirc8M,
+        .fcrdiv = kMCGLITE_LircDivBy1,
+        .lircDiv2 = kMCGLITE_LircDivBy1,
+        .hircEnableInNotHircMode = true,
+    };
+
+    const sim_clock_config_t simConfig =
+    {
+        .er32kSrc = 0U, /* SIM_SOPT1[OSC32KSEL]. */
+        .clkdiv1 = 0x00010000U, /* SIM_CLKDIV1. */
+    };
+
+    CLOCK_SetSimSafeDivs();
+    CLOCK_SetMcgliteConfig(&mcgliteConfig);
+    CLOCK_SetSimConfig(&simConfig);
+    SystemCoreClock = 48000000U;
+}