altos/stm32f4: Need to read-back register after clock enable

[fw/altos] / src / stm32f4 / ao_timer.c

diff --git a/src/stm32f4/ao_timer.c b/src/stm32f4/ao_timer.c
index e378ed071e2aba41758ac1ffbc8a55639ff60db8..fb83db003aa46085f37a3b294e2da02402dc49b3 100644 (file)
--- a/src/stm32f4/ao_timer.c
+++ b/src/stm32f4/ao_timer.c
@@ -181,6 +181,14 @@ ao_clock_init(void)
        cfgr |= (AO_RCC_CFGR_PPRE2_DIV << STM_RCC_CFGR_PPRE2);
        stm_rcc.cfgr = cfgr;
 
+       /* Clock configuration register DCKCFGR2; mostly make sure USB
+        * gets clocked from PLL_Q
+        */
+       stm_rcc.dckcfgr2 = ((STM_RCC_DCKCFGR2_LPTIMER1SEL_APB << STM_RCC_DCKCFGR2_LPTIMER1SEL) |
+                           (STM_RCC_DCKCFGR2_SDIOSEL_CK_48MHZ << STM_RCC_DCKCFGR2_SDIOSEL) |
+                           (STM_RCC_DCKCFGR2_CK48MSEL_PLL_Q << STM_RCC_DCKCFGR2_CK48MSEL) |
+                           (STM_RCC_DCKCFGR2_I2CFMP1SEL_APB << STM_RCC_DCKCFGR2_I2CFMP1SEL));
+
        /* Disable the PLL */
        stm_rcc.cr &= ~(1 << STM_RCC_CR_PLLON);
        while (stm_rcc.cr & (1 << STM_RCC_CR_PLLRDY))
@@ -196,7 +204,6 @@ ao_clock_init(void)
 
        pllcfgr |= (AO_PLL_M << STM_RCC_PLLCFGR_PLLM);
        pllcfgr |= (AO_PLL1_N << STM_RCC_PLLCFGR_PLLN);
-#if AO_PLL1_P
 #if AO_PLL1_P == 2
 #define AO_RCC_PLLCFGR_PLLP    STM_RCC_PLLCFGR_PLLP_DIV_2
 #endif
@@ -210,13 +217,8 @@ ao_clock_init(void)
 #define AO_RCC_PLLCFGR_PLLP    STM_RCC_PLLCFGR_PLLP_DIV_8
 #endif
        pllcfgr |= (AO_RCC_PLLCFGR_PLLP << STM_RCC_PLLCFGR_PLLP);
-#endif
-#if AO_PLL1_Q
        pllcfgr |= (AO_PLL1_Q << STM_RCC_PLLCFGR_PLLQ);
-#endif
-#if AO_PLL1_R
        pllcfgr |= (AO_PLL1_R << STM_RCC_PLLCFGR_PLLR);
-#endif
        /* PLL source */
        pllcfgr &= ~(1 << STM_RCC_PLLCFGR_PLLSRC);
 #if AO_HSI
@@ -260,13 +262,12 @@ ao_clock_init(void)
 #if DEBUG_THE_CLOCK
        /* Output PLL clock on PA8 and SYCLK on PC9 for measurments */
 
-       stm_rcc.ahb1enr |= ((1 << STM_RCC_AHB1ENR_IOPAEN) |
-                           (1 << STM_RCC_AHB1ENR_IOPCEN));
-
+       ao_enable_port(&stm_gpioa);
        stm_afr_set(&stm_gpioa, 8, STM_AFR_AF0);
        stm_moder_set(&stm_gpioa, 8, STM_MODER_ALTERNATE);
        stm_ospeedr_set(&stm_gpioa, 8, STM_OSPEEDR_HIGH);
 
+       ao_enable_port(&stm_gpioc);
        stm_afr_set(&stm_gpioc, 9, STM_AFR_AF0);
        stm_moder_set(&stm_gpioc, 9, STM_MODER_ALTERNATE);
        stm_ospeedr_set(&stm_gpioc, 9, STM_OSPEEDR_HIGH);