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boards: nucleo_f091rc: 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 2021-04-29 14:59:56 +02:00 • committed by Anas Nashif
commit 82d46c6af1
2 changed files with 21 additions and 18 deletions
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20
boards/arm/nucleo_f091rc/nucleo_f091rc.dts
View file

@ -42,6 +42,26 @@
};
};
&clk_hse {
hse-bypass;
clock-frequency = <DT_FREQ_M(8)>; /* STLink 8MHz clock */
status = "okay";
};
&pll {
prediv = <1>;
mul = <6>;
clocks = <&clk_hse>;
status = "okay";
};
&rcc {
clocks = <&pll>;
clock-frequency = <DT_FREQ_M(48)>;
ahb-prescaler = <1>;
apb1-prescaler = <1>;
};
&usart1 {
pinctrl-0 = <&usart1_tx_pb6 &usart1_rx_pb7>;
current-speed = <115200>;

19
boards/arm/nucleo_f091rc/nucleo_f091rc_defconfig
View file

@ -6,9 +6,6 @@ CONFIG_SOC_SERIES_STM32F0X=y
# Platform Configuration
CONFIG_SOC_STM32F091XC=y
# General Kernel Options
CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=48000000
# Serial Drivers
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
@ -22,19 +19,5 @@ CONFIG_PINMUX=y
# GPIO Controller
CONFIG_GPIO=y
# Clock configuration
# Enable Clocks
CONFIG_CLOCK_CONTROL=y
# SYSCLK selection
CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
# HSE configuration
CONFIG_CLOCK_STM32_HSE_CLOCK=8000000
# however, the board does not have an external oscillator, so just use
# the 8MHz clock signal coming from integrated STLink
CONFIG_CLOCK_STM32_HSE_BYPASS=y
# PLL configuration
CONFIG_CLOCK_STM32_PLL_SRC_HSE=y
# produce 48MHz clock at PLL output
CONFIG_CLOCK_STM32_PLL_PREDIV1=1
CONFIG_CLOCK_STM32_PLL_MULTIPLIER=6
CONFIG_CLOCK_STM32_AHB_PRESCALER=1
CONFIG_CLOCK_STM32_APB1_PRESCALER=1