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boards: nucleo f7xx: Increase core speed

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STM32F7 allow to run at significantly higher speed that the one configured
on these boards.
Configure clocks to make benefit of full potential.
Additionally, configure PLL_Q output to provide USB compatible 48MHz freq.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
This commit is contained in:
Erwan Gouriou 2023-01-10 15:14:01 +01:00 • committed by Fabio Baltieri
commit 9151af224a
3 changed files with 15 additions and 15 deletions
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10
boards/arm/nucleo_f746zg/nucleo_f746zg.dts
View file

@ -74,19 +74,19 @@
&pll {
div-m = <4>;
mul-n = <72>;
mul-n = <216>;
div-p = <2>;
div-q = <3>;
div-q = <9>;
clocks = <&clk_hse>;
status = "okay";
};
&rcc {
clocks = <&pll>;
clock-frequency = <DT_FREQ_M(72)>;
clock-frequency = <DT_FREQ_M(216)>;
ahb-prescaler = <1>;
apb1-prescaler = <2>;
apb2-prescaler = <1>;
apb1-prescaler = <4>;
apb2-prescaler = <2>;
};
&usart2 {

10
boards/arm/nucleo_f756zg/nucleo_f756zg.dts
View file

@ -68,19 +68,19 @@
&pll {
div-m = <4>;
mul-n = <72>;
mul-n = <216>;
div-p = <2>;
div-q = <3>;
div-q = <9>;
clocks = <&clk_hse>;
status = "okay";
};
&rcc {
clocks = <&pll>;
clock-frequency = <DT_FREQ_M(72)>;
clock-frequency = <DT_FREQ_M(216)>;
ahb-prescaler = <1>;
apb1-prescaler = <2>;
apb2-prescaler = <1>;
apb1-prescaler = <4>;
apb2-prescaler = <2>;
};
&usart2 {

10
boards/arm/nucleo_f767zi/nucleo_f767zi.dts
View file

@ -75,19 +75,19 @@
&pll {
div-m = <4>;
mul-n = <72>;
mul-n = <216>;
div-p = <2>;
div-q = <3>;
div-q = <9>;
clocks = <&clk_hse>;
status = "okay";
};
&rcc {
clocks = <&pll>;
clock-frequency = <DT_FREQ_M(72)>;
clock-frequency = <DT_FREQ_M(216)>;
ahb-prescaler = <1>;
apb1-prescaler = <2>;
apb2-prescaler = <1>;
apb1-prescaler = <4>;
apb2-prescaler = <2>;
};
&usart2 {