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boards: stm32l476g_disco: Use dts for clocks configuration

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Convert board to use of device tree for clocks configuration.

Signed-off-by: Alexandre Bourdiol <alexandre.bourdiol@st.com>
This commit is contained in:
Alexandre Bourdiol 2021-04-30 10:22:49 +02:00 • committed by Maureen Helm
commit de78df9656
2 changed files with 23 additions and 16 deletions
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22
boards/arm/stm32l476g_disco/stm32l476g_disco.dts
View file

@ -65,6 +65,28 @@
};
};
&clk_hsi {
status = "okay";
};
&pll {
div-m = <1>;
mul-n = <20>;
div-p = <7>;
div-q = <2>;
div-r = <4>;
clocks = <&clk_hsi>;
status = "okay";
};
&rcc {
clocks = <&pll>;
clock-frequency = <DT_FREQ_M(80)>;
ahb-prescaler = <1>;
apb1-prescaler = <1>;
apb2-prescaler = <1>;
};
&usart2 {
pinctrl-0 = <&usart2_tx_pd5 &usart2_rx_pd6>;
current-speed = <115200>;

17
boards/arm/stm32l476g_disco/stm32l476g_disco_defconfig
View file

@ -2,8 +2,6 @@
CONFIG_SOC_SERIES_STM32L4X=y
CONFIG_SOC_STM32L476XX=y
# 80MHz system clock
CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=80000000
# Enable MPU
CONFIG_ARM_MPU=y
@ -20,21 +18,8 @@ CONFIG_PINMUX=y
# enable GPIO
CONFIG_GPIO=y
# clock configuration
# Enable Clocks
CONFIG_CLOCK_CONTROL=y
# SYSCLK selection
CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
# PLL configuration
CONFIG_CLOCK_STM32_PLL_SRC_HSI=y
# produce 80MHz clock at PLL output
CONFIG_CLOCK_STM32_PLL_M_DIVISOR=1
CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=20
CONFIG_CLOCK_STM32_PLL_P_DIVISOR=7
CONFIG_CLOCK_STM32_PLL_Q_DIVISOR=2
CONFIG_CLOCK_STM32_PLL_R_DIVISOR=4
CONFIG_CLOCK_STM32_AHB_PRESCALER=1
CONFIG_CLOCK_STM32_APB1_PRESCALER=1
CONFIG_CLOCK_STM32_APB2_PRESCALER=1
# console
CONFIG_CONSOLE=y