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driver: clock: stm32: boost voltage when clock exceeds 150MHz

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This patch activates the boost mode for the main regulator
when the system frequency above 150MHz for stm32g4xx soc series.
To save power, the boost mode should be disabled below 150MHz.

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2020-02-26 09:05:40 +01:00 committed by Maureen Helm
parent 0b4fbb916e
commit 5c0687e58b
1 changed files with 5 additions and 0 deletions
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5
drivers/clock_control/clock_stm32g4.c
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@ -29,6 +29,11 @@ void config_pll_init(LL_UTILS_PLLInitTypeDef *pllinit)
pllinit->PLLM = pllm(CONFIG_CLOCK_STM32_PLL_M_DIVISOR); pllinit->PLLM = pllm(CONFIG_CLOCK_STM32_PLL_M_DIVISOR);
pllinit->PLLN = CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER; pllinit->PLLN = CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER;
pllinit->PLLR = pllr(CONFIG_CLOCK_STM32_PLL_R_DIVISOR); pllinit->PLLR = pllr(CONFIG_CLOCK_STM32_PLL_R_DIVISOR);
/* set power boost mode for sys clock greater than 150MHz */
if (sys_clock_hw_cycles_per_sec() >= MHZ(150)) {
LL_PWR_EnableRange1BoostMode();
}
} }
#endif /* CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL */ #endif /* CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL */