[riot-notifications] [RIOT-OS/RIOT] boards/stm32l4/wb: add Kconfig for clock configuration (#14968)

Leandro Lanzieri notifications at github.com
Fri Nov 6 10:07:32 CET 2020


> Unfortunately I'm not able to configure HSI as input for the PLL. For some reason, this is not taken into account by Kconfig. It always endup with HSE being selected. I have no idea what's wrong :/

I tried configuring the HSI as source for the PLL and the generated `autoconf.h` looks like this:
```
[...]
#define CONFIG_USE_CLOCK_PLL 1
#define CONFIG_CLOCK_PLL_SRC_HSI 1
#define CONFIG_CLOCK_PLL_M 4
#define CONFIG_CLOCK_PLL_N 16
#define CONFIG_CLOCK_PLL_R 2
[...]
```
Isn't `CONFIG_CLOCK_PLL_SRC_HSI` saying that HSI is the source for PLL?


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