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Merged in david_s5/nuttx/master_h7 (pull request #1037)

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stm32h7:RCC Add PLL3 Support and only enable PLLs if used

Approved-by: Gregory Nutt <gnutt@nuttx.org>
This commit is contained in:
David Sidrane
2019-09-24 14:30:05 +00:00
committed by Gregory Nutt
parent 08ffb3d285
commit 04b501eddf
1 changed files with 41 additions and 5 deletions
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arch/arm/src/stm32h7/stm32h7x3xx_rcc.c
+41 -5
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@@ -70,6 +70,26 @@
# error BOARD_FLASH_WAITSTATES is out of range
#endif
/* PLL are only enabled if the P,Q or R outputs are enabled. */
#undef USE_PLL1
#if STM32_PLLCFG_PLL1CFG & (RCC_PLLCFGR_DIVP1EN | RCC_PLLCFGR_DIVQ1EN | \
RCC_PLLCFGR_DIVR1EN)
# define USE_PLL1
#endif
#undef USE_PLL2
#if STM32_PLLCFG_PLL2CFG & (RCC_PLLCFGR_DIVP2EN | RCC_PLLCFGR_DIVQ2EN | \
RCC_PLLCFGR_DIVR2EN)
# define USE_PLL2
#endif
#undef USE_PLL3
#if STM32_PLLCFG_PLL3CFG & (RCC_PLLCFGR_DIVP3EN | RCC_PLLCFGR_DIVQ3EN | \
RCC_PLLCFGR_DIVR3EN)
# define USE_PLL3
#endif
/****************************************************************************
* Private Data
****************************************************************************/
@@ -686,32 +706,48 @@ static void stm32_stdclockconfig(void)
STM32_PLLCFG_PLL3CFG);
putreg32(regval, STM32_RCC_PLLCFGR);
regval = getreg32(STM32_RCC_CR);
#if defined(USE_PLL1)
/* Enable the PLL1 */
regval = getreg32(STM32_RCC_CR);
regval |= RCC_CR_PLL1ON;
putreg32(regval, STM32_RCC_CR);
#endif
#if defined(USE_PLL2)
/* Enable the PLL2 */
regval = getreg32(STM32_RCC_CR);
regval |= RCC_CR_PLL2ON;
#endif
#if defined(USE_PLL3)
/* Enable the PLL3 */
regval |= RCC_CR_PLL3ON;
#endif
putreg32(regval, STM32_RCC_CR);
/* TODO: Enable the PLL3 */
#if defined(USE_PLL1)
/* Wait until the PLL1 is ready */
while ((getreg32(STM32_RCC_CR) & RCC_CR_PLL1RDY) == 0)
{
}
#endif
#if defined(USE_PLL2)
/* Wait until the PLL2 is ready */
while ((getreg32(STM32_RCC_CR) & RCC_CR_PLL2RDY) == 0)
{
}
#endif
#if defined(USE_PLL3)
/* Wait until the PLL3 is ready */
while ((getreg32(STM32_RCC_CR) & RCC_CR_PLL3RDY) == 0)
{
}
#endif
/* Configure FLASH wait states */
regval = FLASH_ACR_LATENCY(BOARD_FLASH_WAITSTATES);