Hi Sergei,
On Fri, Sep 15, 2017 at 7:28 PM, Sergei Shtylyov
<sergei.shtylyov@xxxxxxxxxxxxxxxxxx> wrote:
> On 09/13/2017 12:19 AM, Sergei Shtylyov wrote:
>>> Add the initial device tree for the R8A77970 SoC based Eagle board.
>>> The board has 1 debug serial port (SCIF0); include support for it,
>>> so that the serial console can work.
>>>
>>> Based on the original (and large) patch by Vladimir Barinov
>>> <vladimir.barinov@xxxxxxxxxxxxxxxxxx>.
>>>
>>> Signed-off-by: Vladimir Barinov <vladimir.barinov@xxxxxxxxxxxxxxxxxx>
>>> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
>>>
>> [...]
>>>
>>> Index: renesas/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
>>> ===================================================================
>>> --- /dev/null
>>> +++ renesas/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
>>> @@ -0,0 +1,45 @@
>>
>> [...]
>>>
>>> +&extal_clk {
>>> + clock-frequency = <16666666>;
>>> +};
>>> +
>>> +&extalr_clk {
>>> + clock-frequency = <32768>;
>>> +};
>>> +
>>
>> Forgot to specify SCIF_CLK -- it's populated.
>
> Unfortunately, the kernel hangs after ttySC0 is registered if I specify
> this frequency...
Is the crystal populated?
When doing initial bringup of the remote Eagle I have access to, the SCIF
registers didn't indicate SCIF_CLK was being used from U-Boot, while it
is used on R-Car Gen2 boards that have it populated.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
