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drivers/clock_control: stm32H7 AHB clock computation depends on core

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On cortex M4, AHB clock is equal to SystemCoreClock
On Cortex M7, AHB clock is equal to SystemCoreClock/HPRE
By the way, D1CPRE is of no use when starting from SystemCoreColck.

Signed-off-by: Alexandre Bourdiol <alexandre.bourdiol@st.com>
This commit is contained in:
Alexandre Bourdiol 2020-04-29 15:17:30 +02:00 • committed by Kumar Gala
commit 0c8c6d2bb2
1 changed files with 5 additions and 3 deletions
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8
drivers/clock_control/clock_stm32_ll_h7.c
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@ -162,10 +162,12 @@ static int stm32_clock_control_get_subsys_rate(struct device *clock,
* since it will be updated after clock configuration and hence
* more likely to contain actual clock speed
*/
u32_t sys_d1cpre_ck = get_bus_clock(SystemCoreClock,
CONFIG_CLOCK_STM32_D1CPRE);
u32_t ahb_clock = get_bus_clock(sys_d1cpre_ck,
#if defined(CONFIG_CPU_CORTEX_M4)
u32_t ahb_clock = SystemCoreClock;
#else
u32_t ahb_clock = get_bus_clock(SystemCoreClock,
CONFIG_CLOCK_STM32_HPRE);
#endif
u32_t apb1_clock = get_bus_clock(ahb_clock,
CONFIG_CLOCK_STM32_D2PPRE1);
u32_t apb2_clock = get_bus_clock(ahb_clock,