squash kw41z/cpu.c cleanup

cpu/kw41z/cpu.c

@@ -23,34 +23,19 @@
 #include "cpu_conf.h"
 #include "periph/init.h"
 
-static void cpu_clock_init(void);
-
 /**
  * @brief Initialize the CPU, set IRQ priorities
  */
 void cpu_init(void)
 {
     /* initialize the Cortex-M core */
     cortexm_init();
-    /* initialize the clock system */
-    cpu_clock_init();
+    /* Clear LLS protection */
+    /* Clear VLPS, VLPW, VLPR protection */
+    /* Note: This register can only be written once after each reset, so we must
+     * enable all power modes that we wish to use. */
+    SMC->PMPROT |= SMC_PMPROT_ALLS_MASK | SMC_PMPROT_AVLP_MASK;
+
     /* trigger static peripheral initialization */
     periph_init();
 }
-
-/**
- * @brief Configure the clock prescalers
- *
- * | Clock name | Run mode frequency (max) | VLPR mode frequency (max) |
- *
- * | Core       |  48 MHz                  |   4 MHz                   |
- * | System     |  48 MHz                  |   4 MHz                   |
- * | Bus        |  24 MHz                  |   1 MHz or 800 KHz        |
- * | Flash      |  24 MHz                  |   1 MHz or 800 KHz        |
- */
-static void cpu_clock_init(void)
-{
-    /* setup system prescalers */
-    /* TODO: Make this configurable */
-    SIM->CLKDIV1 = (uint32_t)SIM_CLKDIV1_OUTDIV4(1);
-}