boards: sensortile_box: Use dts for clocks configuration

Convert board to use of device tree for clocks configuration.

Signed-off-by: Alexandre Bourdiol <[email protected]>

boards/arm/sensortile_box/sensortile_box.dts

@@ -47,6 +47,29 @@
  };
 };
 
+&clk_hse {
+ clock-frequency = <DT_FREQ_M(16)>;
+ status = "okay";
+};
+
+&pll {
+ div-m = <4>;
+ mul-n = <40>;
+ div-p = <7>;
+ div-q = <2>;
+ div-r = <2>;
+ clocks = <&clk_hse>;
+ status = "okay";
+};
+
+&rcc {
+ clocks = <&pll>;
+ clock-frequency = <DT_FREQ_M(80)>;
+ ahb-prescaler = <1>;
+ apb1-prescaler = <1>;
+ apb2-prescaler = <1>;
+};
+
 &usart1 {
  pinctrl-0 = <&usart1_tx_pa9 &usart1_rx_pa10>;
  current-speed = <115200>;

boards/arm/sensortile_box/sensortile_box_defconfig

@@ -3,15 +3,6 @@
 CONFIG_SOC_SERIES_STM32L4X=y
 CONFIG_SOC_STM32L4R9XX=y
 
-# 120MHz system clock only in 'boost power' mode. DM00310109, section
-# 5.1.7 states that the R1MODE bit must be cleared before system can
-# be 120MHz. This requires an update to the stm32 clock control
-# driver, so default to 80MHz until then.
-# CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=120000000
-
-# 80MHz system clock in 'normal power' mode
-CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=80000000
-
 # enable uart driver
 CONFIG_SERIAL=y
 
@@ -21,36 +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 HSI (16MHz) to feed into PLL
-#CONFIG_CLOCK_STM32_PLL_SRC_HSI=y
-CONFIG_CLOCK_STM32_PLL_SRC_HSE=y
-CONFIG_CLOCK_STM32_HSE_CLOCK=16000000
-
-CONFIG_CLOCK_STM32_PLL_M_DIVISOR=4
-CONFIG_CLOCK_STM32_PLL_P_DIVISOR=7
-CONFIG_CLOCK_STM32_PLL_Q_DIVISOR=2
-CONFIG_CLOCK_STM32_PLL_R_DIVISOR=2
-
-# Produce 80MHz clock at PLLCLK output
-CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=40
-
-# Comment out above and uncomment below for 120MHz. Note that you
-# must have configured the mcu for boost power mode.
-# CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=60
-
-# Produce Max (80MHz or 120MHz) HCLK
-CONFIG_CLOCK_STM32_AHB_PRESCALER=1
-
-# Produce Max (80MHz or 120MHz) 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