From 229ec98da9e9ccc19658fe7652a360d8772c9e17 Mon Sep 17 00:00:00 2001
From: Alexandre Bourdiol <alexandre.bourdiol@st.com>
Date: Thu, 29 Apr 2021 15:27:25 +0200
Subject: [PATCH] boards: nucleo_f303k8: Use dts for clocks configuration

Convert board to use of device tree for clocks configuration.

Signed-off-by: Alexandre Bourdiol <alexandre.bourdiol@st.com>
---
 boards/arm/nucleo_f303k8/nucleo_f303k8.dts    | 19 +++++++++++++++++++
 .../arm/nucleo_f303k8/nucleo_f303k8_defconfig | 17 +----------------
 2 files changed, 20 insertions(+), 16 deletions(-)

diff --git a/boards/arm/nucleo_f303k8/nucleo_f303k8.dts b/boards/arm/nucleo_f303k8/nucleo_f303k8.dts
index 88e94124272..e17c3113fd3 100644
--- a/boards/arm/nucleo_f303k8/nucleo_f303k8.dts
+++ b/boards/arm/nucleo_f303k8/nucleo_f303k8.dts
@@ -40,6 +40,25 @@
 	};
 };
 
+&clk_hsi {
+	status = "okay";
+};
+
+&pll {
+	prediv = <1>;
+	mul = <9>;
+	clocks = <&clk_hsi>;
+	status = "okay";
+};
+
+&rcc {
+	clocks = <&pll>;
+	clock-frequency = <DT_FREQ_M(72)>;
+	ahb-prescaler = <1>;
+	apb1-prescaler = <2>;
+	apb2-prescaler = <1>;
+};
+
 &timers2 {
 	status = "okay";
 
diff --git a/boards/arm/nucleo_f303k8/nucleo_f303k8_defconfig b/boards/arm/nucleo_f303k8/nucleo_f303k8_defconfig
index 5cc8f5df0e6..c4f486c1f2c 100644
--- a/boards/arm/nucleo_f303k8/nucleo_f303k8_defconfig
+++ b/boards/arm/nucleo_f303k8/nucleo_f303k8_defconfig
@@ -2,8 +2,6 @@
 
 CONFIG_SOC_SERIES_STM32F3X=y
 CONFIG_SOC_STM32F303X8=y
-# 72 MHz system clock
-CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=72000000
 
 CONFIG_SERIAL=y
 
@@ -17,18 +15,5 @@ CONFIG_PINMUX=y
 # enable GPIO
 CONFIG_GPIO=y
 
-# clock configuration
+# Enable Clocks
 CONFIG_CLOCK_CONTROL=y
-
-# Clock configuration for Cube Clock control driver
-CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
-# use HSI as PLL input
-CONFIG_CLOCK_STM32_PLL_SRC_HSI=y
-# however, the board does not have an external oscillator, so just use
-# the 8MHz clock signal coming from integrated STLink
-# 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