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boards: stm32f1: Check usbpre/otgfspre based on sysclk freq.

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If sysclk is set to 72MHz, USB prescaler should be not be set in
order to achieve 48MHz USB clock.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
This commit is contained in:
Erwan Gouriou 2022-12-21 13:17:07 +01:00 • committed by Carles Cufí
commit c385144070
5 changed files with 5 additions and 0 deletions
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1
boards/arm/olimex_stm32_h103/olimex_stm32_h103.dts
View file

@ -58,6 +58,7 @@
ahb-prescaler = <1>; ahb-prescaler = <1>;
apb1-prescaler = <2>; apb1-prescaler = <2>;
apb2-prescaler = <1>; apb2-prescaler = <1>;
/* usbpre not set: USB clock = 72 / 1.5: 48MHz */
}; };
&usart1 { &usart1 {

1
boards/arm/olimexino_stm32/olimexino_stm32.dts
View file

@ -73,6 +73,7 @@
ahb-prescaler = <1>; ahb-prescaler = <1>;
apb1-prescaler = <2>; apb1-prescaler = <2>;
apb2-prescaler = <1>; apb2-prescaler = <1>;
/* usbpre not set: USB clock = 72 / 1.5: 48MHz */
}; };
uext_i2c: &i2c2 {}; uext_i2c: &i2c2 {};

1
boards/arm/stm32_min_dev/stm32_min_dev.dtsi
View file

@ -50,6 +50,7 @@
ahb-prescaler = <1>; ahb-prescaler = <1>;
apb1-prescaler = <2>; apb1-prescaler = <2>;
apb2-prescaler = <1>; apb2-prescaler = <1>;
/* usbpre not set: USB clock = 72 / 1.5: 48MHz */
}; };
&usart1 { &usart1 {

1
boards/arm/stm32f103_mini/stm32f103_mini.dts
View file

@ -54,6 +54,7 @@
ahb-prescaler = <1>; ahb-prescaler = <1>;
apb1-prescaler = <2>; apb1-prescaler = <2>;
apb2-prescaler = <1>; apb2-prescaler = <1>;
/* usbpre not set: USB clock = 72 / 1.5: 48MHz */
}; };
&usart1 { &usart1 {

1
boards/arm/waveshare_open103z/waveshare_open103z.dts
View file

@ -95,6 +95,7 @@
ahb-prescaler = <1>; ahb-prescaler = <1>;
apb1-prescaler = <2>; apb1-prescaler = <2>;
apb2-prescaler = <1>; apb2-prescaler = <1>;
/* usbpre not set: USB clock = 72 / 1.5: 48MHz */
}; };
&usart1 { &usart1 {