boards: nucleo_h743zi: Use dts for clocks configuration

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 15:19:46 +02:00 committed by Kumar Gala
parent 39a58dd6e6
commit 3e6666d53d
2 changed files with 28 additions and 19 deletions

View file

@ -58,6 +58,33 @@
};
};
&clk_hse {
hse-bypass;
clock-frequency = <DT_FREQ_M(8)>; /* STLink 8MHz clock */
status = "okay";
};
&pll {
div-m = <1>;
mul-n = <24>;
div-p = <2>;
div-q = <4>;
div-r = <2>;
clocks = <&clk_hse>;
status = "okay";
};
&rcc {
clocks = <&pll>;
clock-frequency = <DT_FREQ_M(96)>;
d1cpre = <1>;
hpre = <1>;
d1ppre = <1>;
d2ppre1 = <1>;
d2ppre2 = <1>;
d3ppre = <1>;
};
&usart3 {
pinctrl-0 = <&usart3_tx_pd8 &usart3_rx_pd9>;
current-speed = <115200>;

View file

@ -2,8 +2,6 @@
CONFIG_SOC_SERIES_STM32H7X=y
CONFIG_SOC_STM32H743XX=y
# 96MHz system clock (CubeMX Defaults)
CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=96000000
# Enable MPU
CONFIG_ARM_MPU=y
@ -24,21 +22,5 @@ CONFIG_PINMUX=y
# Enable GPIO
CONFIG_GPIO=y
# Clock Configuration
# Enable clocks
CONFIG_CLOCK_CONTROL=y
# STLINK provides 8MHz clock input
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
# Nucleo-144 boards do not have an external oscillator, so just use
# the 8MHz clock signal coming from integrated STLink
CONFIG_CLOCK_STM32_HSE_BYPASS=y
# Produce 96MHz clock at PLL output
CONFIG_CLOCK_STM32_PLL_M_DIVISOR=1
CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=24
CONFIG_CLOCK_STM32_PLL_P_DIVISOR=2
CONFIG_CLOCK_STM32_PLL_Q_DIVISOR=4
CONFIG_CLOCK_STM32_PLL_R_DIVISOR=2