[Buildroot] [PATCH v5 2/6] board/raspberrypicm4io: enable RTC and USB overlays

[Yann E. MORIN]

Peter, All,

On 2021-09-21 22:21 +0200, Peter Seiderer spake thusly:
> - add RTC and USB dtoverlay entries to config_cm4io.txt

Why specifically the RTC and USB? And why only on the CM, and not the
other boards?

IIRC, dwc2 is an OTG chip, too, and it is also wired on the rpi0. Well,
by experience, I know that the rpi0 *can* do USB slave/OTG.

Regards,
Yann E. MORIN.

> Signed-off-by: Peter Seiderer <ps.report at gmx.net>
> ---
> Changes v4 -> v5:
>   - new patch
> ---
>  board/raspberrypi/config_cm4io.txt | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/board/raspberrypi/config_cm4io.txt b/board/raspberrypi/config_cm4io.txt
> index 01f60395b3..cf7e6df1a1 100644
> --- a/board/raspberrypi/config_cm4io.txt
> +++ b/board/raspberrypi/config_cm4io.txt
> @@ -24,3 +24,10 @@ gpu_mem_1024=100
>  
>  # fixes rpi (3B, 3B+, 3A+, 4B and Zero W) ttyAMA0 serial console
>  dtoverlay=miniuart-bt
> +
> +# enable RTC
> +dtparam=i2c_vc=on
> +dtoverlay=i2c-rtc,pcf85063a,i2c_csi_dsi
> +
> +# enable dwc2 USB controller (USB 2.0)
> +dtoverlay=dwc2,dr_mode=host
> -- 
> 2.33.0
> 
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