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dts/arm/st: wl: increase Sub-GHz SPI frequency to 12MHz

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The maximum supported speed according to the SX126x datasheet (I have
not found that information in the STM32WL datasheet or reference
manual). Increase the Sub-GHz SPI frequency from 1 Mhz to to 12 MHz,
which corresponds to a baud rate prescaler of 4 with a 48 MHz clock. It
also matches what is done the the STM32CubeWL package.

This reduces the time the MCU is kept running, thus reducing the global
power consumption.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2021-09-23 21:38:25 +02:00 committed by Christopher Friedt
parent c938c81575
commit 246ea739bb
1 changed files with 1 additions and 1 deletions
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2
dts/arm/st/wl/stm32wl.dtsi
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@ -296,7 +296,7 @@
compatible = "st,stm32wl-subghz-radio";
reg = <0>;
interrupts = <50 0>;
spi-max-frequency = <1000000>;
spi-max-frequency = <12000000>;
status = "disabled";
label = "subghz-radio";
};