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boards: stm3210c_eval: 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 2021-05-04 10:38:42 +02:00 • committed by Kumar Gala
commit 64359e1641
2 changed files with 22 additions and 21 deletions
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21
boards/arm/stm3210c_eval/stm3210c_eval.dts
View file

@ -41,6 +41,27 @@
};
};
&clk_hse {
hse-bypass;
clock-frequency = <DT_FREQ_M(8)>; /* STLink 8MHz clock */
status = "okay";
};
&pll {
mul = <9>;
prediv = <1>;
clocks = <&clk_hse>;
status = "okay";
};
&rcc {
clocks = <&pll>;
clock-frequency = <DT_FREQ_M(72)>;
ahb-prescaler = <1>;
apb1-prescaler = <2>;
apb2-prescaler = <1>;
};
&usart2 {
pinctrl-0 = <&usart2_tx_pd5 &usart2_rx_pd6>;
current-speed = <115200>;

22
boards/arm/stm3210c_eval/stm3210c_eval_defconfig
View file

@ -6,10 +6,6 @@ CONFIG_SOC_SERIES_STM32F1X=y
# Platform Configuration
CONFIG_SOC_STM32F107XC=y
# General Kernel Options
# 72MHz system clock
CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=72000000
# Serial Drivers
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
@ -23,21 +19,5 @@ CONFIG_PINMUX=y
# GPIO Controller
CONFIG_GPIO=y
# RCC configuration
# RCC Controller
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
CONFIG_CLOCK_STM32_PLL_SRC_PLL2=n
# 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
# produce 72MHz clock at PLL output
CONFIG_CLOCK_STM32_PLL_PREDIV1=1
CONFIG_CLOCK_STM32_PLL_MULTIPLIER=9
CONFIG_CLOCK_STM32_AHB_PRESCALER=1
# APB1 clock must not to exceed 36MHz limit
CONFIG_CLOCK_STM32_APB1_PRESCALER=2
CONFIG_CLOCK_STM32_APB2_PRESCALER=1