boards: nucleo: Convert 4 boards to dts based clocks configuration

Convert following boards to dts based clocks configuration:
- nucleo_f070rb
- nucleo_f334r8
- nucleo_g071rb
- nucleo_g431rb

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>

boards/arm/nucleo_f070rb/nucleo_f070rb.dts

@@ -42,6 +42,26 @@
 	};
 };
 
+&clk_hse {
+	hse-bypass;
+	clock-frequency = <DT_FREQ_M(8)>; /* STLink 8MHz clock */
+	status = "okay";
+};
+
+&pll {
+	clocks = <&clk_hse>;
+	prediv = <1>;
+	mul = <6>;
+	status = "okay";
+};
+
+&rcc {
+	clocks = <&pll>;
+	clock-frequency = <DT_FREQ_M(48)>;
+	ahb-prescaler = <1>;
+	apb1-prescaler = <2>;
+};
+
 &usart1 {
 	pinctrl-0 = <&usart1_tx_pa9 &usart1_rx_pa10>;
 	current-speed = <115200>;

boards/arm/nucleo_f070rb/nucleo_f070rb_defconfig

@@ -6,9 +6,6 @@ CONFIG_SOC_SERIES_STM32F0X=y
 # Platform Configuration
 CONFIG_SOC_STM32F070XB=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

boards/arm/nucleo_f334r8/nucleo_f334r8.dts

@@ -42,6 +42,27 @@
 	};
 };
 
+&clk_hse {
+	hse-bypass;
+	clock-frequency = <DT_FREQ_M(8)>; /* STLink 8MHz clock */
+	status = "okay";
+};
+
+&pll {
+	clocks = <&clk_hse>;
+	prediv = <1>;
+	mul = <9>;
+	status = "okay";
+};
+
+&rcc {
+	clocks = <&pll>;
+	clock-frequency = <DT_FREQ_M(72)>;
+	ahb-prescaler = <1>;
+	apb1-prescaler = <2>;
+	apb2-prescaler = <1>;
+};
+
 &usart1 {
 	pinctrl-0 = <&usart1_tx_pa9 &usart1_rx_pa10>;
 	current-speed = <115200>;

boards/arm/nucleo_f334r8/nucleo_f334r8_defconfig

@@ -6,9 +6,6 @@ CONFIG_SOC_SERIES_STM32F3X=y
 # Platform Configuration
 CONFIG_SOC_STM32F334X8=y
 
-# General Kernel Options
-CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=72000000
-
 # Serial Drivers
 CONFIG_SERIAL=y
 CONFIG_UART_INTERRUPT_DRIVEN=y
@@ -22,20 +19,5 @@ CONFIG_PINMUX=y
 # GPIO Controller
 CONFIG_GPIO=y
 
-# Clock configuration
+# Enable clock
 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 72MHz clock at PLL output
-CONFIG_CLOCK_STM32_PLL_PREDIV=1
-CONFIG_CLOCK_STM32_PLL_MULTIPLIER=9
-CONFIG_CLOCK_STM32_AHB_PRESCALER=1
-CONFIG_CLOCK_STM32_APB1_PRESCALER=2
-CONFIG_CLOCK_STM32_APB2_PRESCALER=1

boards/arm/nucleo_g071rb/nucleo_g071rb.dts

@@ -43,6 +43,27 @@
 	};
 };
 
+&clk_hsi{
+	status = "okay";
+};
+
+&pll {
+	div-m = <1>;
+	mul-n = <8>;
+	div-p = <2>;
+	div-q = <2>;
+	div-r = <2>;
+	clocks = <&clk_hsi>;
+	status = "okay";
+};
+
+&rcc {
+	clocks = <&pll>;
+	clock-frequency = <DT_FREQ_M(64)>;
+	ahb-prescaler = <1>;
+	apb1-prescaler = <1>;
+};
+
 &usart1 {
 	pinctrl-0 = <&usart1_tx_pc4 &usart1_rx_pc5>;
 	current-speed = <115200>;

boards/arm/nucleo_g071rb/nucleo_g071rb_defconfig

@@ -5,9 +5,6 @@ CONFIG_SOC_STM32G071XX=y
 # Enable MPU
 CONFIG_ARM_MPU=y
 
-# 64MHz system clock
-CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=64000000
-
 # Serial Drivers
 CONFIG_SERIAL=y
 CONFIG_UART_INTERRUPT_DRIVEN=y
@@ -21,17 +18,5 @@ CONFIG_PINMUX=y
 # GPIO Controller
 CONFIG_GPIO=y
 
-# Clock configuration
+# Enables clocks
 CONFIG_CLOCK_CONTROL=y
-# SYSCLK selection
-CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
-# PLL configuration
-CONFIG_CLOCK_STM32_PLL_SRC_HSI=y
-# produce 64MHz clock at PLL output
-CONFIG_CLOCK_STM32_PLL_M_DIVISOR=1
-CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=8
-CONFIG_CLOCK_STM32_PLL_P_DIVISOR=2
-CONFIG_CLOCK_STM32_PLL_Q_DIVISOR=2
-CONFIG_CLOCK_STM32_PLL_R_DIVISOR=2
-CONFIG_CLOCK_STM32_AHB_PRESCALER=1
-CONFIG_CLOCK_STM32_APB1_PRESCALER=1

boards/arm/nucleo_g431rb/nucleo_g431rb.dts

@@ -51,6 +51,29 @@
 	};
 };
 
+&clk_hse{
+	clock-frequency = <DT_FREQ_M(24)>;
+	status = "okay";
+};
+
+&pll {
+	div-m = <6>;
+	mul-n = <85>;
+	div-p = <7>;
+	div-q = <2>;
+	div-r = <2>;
+	clocks = <&clk_hse>;
+	status = "okay";
+};
+
+&rcc {
+	clocks = <&pll>;
+	clock-frequency = <DT_FREQ_M(170)>;
+	ahb-prescaler = <1>;
+	apb1-prescaler = <1>;
+	apb2-prescaler = <1>;
+};
+
 &usart1 {
 	pinctrl-0 = <&usart1_tx_pc4 &usart1_rx_pc5>;
 	current-speed = <115200>;

boards/arm/nucleo_g431rb/nucleo_g431rb_defconfig

@@ -3,14 +3,6 @@
 CONFIG_SOC_SERIES_STM32G4X=y
 CONFIG_SOC_STM32G431XX=y
 
-# 170MHz system clock only in 'boost power' mode.
-# RM0440, section 5.1.5 states that the R1MODE bit
-# must be cleared before system can be 170MHz.
-CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=170000000
-
-# 150MHz system clock in 'normal power' mode
-# CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=150000000
-
 # enable uart driver
 CONFIG_SERIAL=y
 
@@ -20,35 +12,9 @@ CONFIG_PINMUX=y
 # enable GPIO
 CONFIG_GPIO=y
 
-# clock configuration
+# enable clocks
 CONFIG_CLOCK_CONTROL=y
 
-# Use PLLCLK for SYSCLK
-CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
-
-# Use HSE (24MHz) to feed into PLL
-CONFIG_CLOCK_STM32_PLL_SRC_HSE=y
-CONFIG_CLOCK_STM32_HSE_CLOCK=24000000
-
-CONFIG_CLOCK_STM32_PLL_P_DIVISOR=7
-CONFIG_CLOCK_STM32_PLL_Q_DIVISOR=2
-CONFIG_CLOCK_STM32_PLL_R_DIVISOR=2
-
-# Produce 150MHz clock at PLLCLK output
-# CONFIG_CLOCK_STM32_PLL_M_DIVISOR=4
-# CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=50
-
-# Produce 170MHz clock at PLLCLK output
-CONFIG_CLOCK_STM32_PLL_M_DIVISOR=6
-CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=85
-
-# Produce Max (150MHz or 170MHz) HCLK
-CONFIG_CLOCK_STM32_AHB_PRESCALER=1
-
-# Produce Max (150MHz or 170MHz) APB1 clocks and APB2 clocks
-CONFIG_CLOCK_STM32_APB1_PRESCALER=1
-CONFIG_CLOCK_STM32_APB2_PRESCALER=1
-
 # Console
 CONFIG_CONSOLE=y
 CONFIG_UART_CONSOLE=y