From 53198f3d7ab49b0e9145a056a0b0fea055f1f6a9 Mon Sep 17 00:00:00 2001
From: Alexandre Bourdiol <alexandre.bourdiol@st.com>
Date: Fri, 30 Apr 2021 17:56:07 +0200
Subject: [PATCH] boards: nucleo_f302r8: 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_f302r8/nucleo_f302r8.dts    | 21 +++++++++++++++++++
 .../arm/nucleo_f302r8/nucleo_f302r8_defconfig | 19 +----------------
 2 files changed, 22 insertions(+), 18 deletions(-)

diff --git a/boards/arm/nucleo_f302r8/nucleo_f302r8.dts b/boards/arm/nucleo_f302r8/nucleo_f302r8.dts
index f3866934d56..2687bd88cbd 100644
--- a/boards/arm/nucleo_f302r8/nucleo_f302r8.dts
+++ b/boards/arm/nucleo_f302r8/nucleo_f302r8.dts
@@ -42,6 +42,27 @@
 	};
 };
 
+&clk_hse {
+	hse-bypass;
+	clock-frequency = <DT_FREQ_M(8)>; /* STLink 8MHz clock */
+	status = "okay";
+};
+
+&pll {
+	prediv = <1>;
+	mul = <9>;
+	clocks = <&clk_hse>;
+	status = "okay";
+};
+
+&rcc {
+	clocks = <&pll>;
+	clock-frequency = <DT_FREQ_M(72)>;
+	ahb-prescaler = <1>;
+	apb1-prescaler = <2>;
+	apb2-prescaler = <1>;
+};
+
 &i2c1 {
 	pinctrl-0 = <&i2c1_scl_pb8 &i2c1_sda_pb9>;
 	status = "okay";
diff --git a/boards/arm/nucleo_f302r8/nucleo_f302r8_defconfig b/boards/arm/nucleo_f302r8/nucleo_f302r8_defconfig
index f802f6b6afe..beea91851db 100644
--- a/boards/arm/nucleo_f302r8/nucleo_f302r8_defconfig
+++ b/boards/arm/nucleo_f302r8/nucleo_f302r8_defconfig
@@ -2,8 +2,6 @@
 
 CONFIG_SOC_SERIES_STM32F3X=y
 CONFIG_SOC_STM32F302X8=y
-# 72 MHz system clock
-CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=72000000
 
 CONFIG_SERIAL=y
 
@@ -17,20 +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_HSE_CLOCK=8000000
-CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
-# use HSE as PLL input
-CONFIG_CLOCK_STM32_PLL_SRC_HSE=y
-# 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_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