stm32: pll: disable before configuring

2018-11-09 18:51:57 +01:00
parent 8b13977ea0
commit f0e5c73d98
4 changed files with 16 additions and 0 deletions
--- a/lib/stm32/l1/rcc.c
+++ b/lib/stm32/l1/rcc.c
@@ -535,6 +535,10 @@ void rcc_clock_setup_pll(const struct rcc_clock_scale *clock)
 	flash_prefetch_enable();
 	flash_set_ws(clock->flash_waitstates);

+	/* Disable PLL oscillator before changing its configuration. */
+	rcc_osc_off(RCC_PLL);
+
+	/* Configure the PLL oscillator. */
 	rcc_set_pll_configuration(clock->pll_source, clock->pll_mul,
 				  clock->pll_div);