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boards: stm32h747i_disco: Use dts for clocks configuration

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Convert board to use of device tree for clocks configuration.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
This commit is contained in:
Erwan Gouriou 2021-05-03 15:20:18 +02:00 • committed by Kumar Gala
commit f447fa33e3
5 changed files with 34 additions and 42 deletions
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26
boards/arm/stm32h747i_disco/Kconfig.defconfig
View file

@ -9,32 +9,6 @@ config BOARD
default "stm32h747i_disco_m7" if BOARD_STM32H747I_DISCO_M7
default "stm32h747i_disco_m4" if BOARD_STM32H747I_DISCO_M4
# clock configuration
config SYS_CLOCK_HW_CYCLES_PER_SEC
default 400000000 if BOARD_STM32H747I_DISCO_M7
# SYS_CLOCK_M4 = SYS_CLOCK_M7 / CLOCK_STM32_HPRE
default 200000000 if BOARD_STM32H747I_DISCO_M4
config CLOCK_STM32_D1CPRE
default 1
config CLOCK_STM32_HPRE
# HCLK: 200MHz
default 2
config CLOCK_STM32_D2PPRE1
# APBX: 100MHz
default 2
config CLOCK_STM32_D2PPRE2
default 2
config CLOCK_STM32_D1PPRE
default 2
config CLOCK_STM32_D3PPRE
default 2
config STM32H7_DUAL_CORE
default y

9
boards/arm/stm32h747i_disco/stm32h747i_disco.dtsi
View file

@ -66,4 +66,13 @@
};
};
&rcc {
d1cpre = <1>;
hpre = <2>;
d1ppre = <2>;
d2ppre1 = <2>;
d2ppre2 = <2>;
d3ppre = <2>;
};
arduino_serial: &uart8 {};

4
boards/arm/stm32h747i_disco/stm32h747i_disco_m4.dts
View file

@ -43,6 +43,10 @@
};
};
&rcc {
clock-frequency = <DT_FREQ_M(200)>;
};
&usart1 {
pinctrl-0 = <&usart1_tx_pa9 &usart1_rx_pa10>;
current-speed = <115200>;

20
boards/arm/stm32h747i_disco/stm32h747i_disco_m7.dts
View file

@ -48,6 +48,26 @@
};
};
&clk_hse {
clock-frequency = <DT_FREQ_M(25)>;
status = "okay";
};
&pll {
div-m = <5>;
mul-n = <160>;
div-p = <2>;
div-q = <4>;
div-r = <2>;
clocks = <&clk_hse>;
status = "okay";
};
&rcc {
clocks = <&pll>;
clock-frequency = <DT_FREQ_M(400)>;
};
&usart1 {
pinctrl-0 = <&usart1_tx_pa9 &usart1_rx_pa10>;
current-speed = <115200>;

17
boards/arm/stm32h747i_disco/stm32h747i_disco_m7_defconfig
View file

@ -12,24 +12,9 @@ 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=25000000
CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
# use HSE (bypass) as PLL input
CONFIG_CLOCK_STM32_PLL_SRC_HSE=y
CONFIG_CLOCK_STM32_HSE_BYPASS=y
# produce 400MHz clock at PLL output
CONFIG_CLOCK_STM32_PLL_M_DIVISOR=5
CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=160
CONFIG_CLOCK_STM32_PLL_P_DIVISOR=2
CONFIG_CLOCK_STM32_PLL_Q_DIVISOR=4
CONFIG_CLOCK_STM32_PLL_R_DIVISOR=2
# Enable MPU
CONFIG_ARM_MPU=y