patrick/zephyr
1
0
Fork 0
Code Issues Pull requests Actions 7 Packages Projects Releases Wiki Activity

boards: stm32f4_disco: Use dts for clocks configuration

Browse source 
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 2021-05-04 11:00:12 +02:00 committed by Kumar Gala
parent e37bf46858
commit b71b869bf6
2 changed files with 23 additions and 17 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
boards/arm/stm32f4_disco/stm32f4_disco.dts
View file

@ -64,6 +64,28 @@
status = "okay";
};
&clk_hse {
clock-frequency = <DT_FREQ_M(8)>;
status = "okay";
};
&pll {
div-m = <8>;
mul-n = <336>;
div-p = <2>;
div-q = <7>;
clocks = <&clk_hse>;
status = "okay";
};
&rcc {
clocks = <&pll>;
clock-frequency = <DT_FREQ_M(168)>;
ahb-prescaler = <1>;
apb1-prescaler = <4>;
apb2-prescaler = <2>;
};
&usart2 {
pinctrl-0 = <&usart2_tx_pa2 &usart2_rx_pa3>;
current-speed = <115200>;

18
boards/arm/stm32f4_disco/stm32f4_disco_defconfig
View file

@ -2,8 +2,6 @@
CONFIG_SOC_SERIES_STM32F4X=y
CONFIG_SOC_STM32F407XG=y
# 168MHz system clock
CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=168000000
# Enable MPU
CONFIG_ARM_MPU=y
@ -23,19 +21,5 @@ CONFIG_PINMUX=y
# enable GPIO
CONFIG_GPIO=y
# clock configuration
# Enable Clocks
CONFIG_CLOCK_CONTROL=y
# Clock configuration for Cube Clock control driver
CONFIG_CLOCK_STM32_HSE_CLOCK=8000000
CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
# use HSE as PLL input
CONFIG_CLOCK_STM32_PLL_SRC_HSE=y
# produce 168MHz clock at PLL output
CONFIG_CLOCK_STM32_PLL_M_DIVISOR=8
CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=336
CONFIG_CLOCK_STM32_PLL_P_DIVISOR=2
CONFIG_CLOCK_STM32_PLL_Q_DIVISOR=7
CONFIG_CLOCK_STM32_AHB_PRESCALER=1
CONFIG_CLOCK_STM32_APB1_PRESCALER=4
CONFIG_CLOCK_STM32_APB2_PRESCALER=2