Re: [PATCH -next] xtensa: Fix build error due to missing include file

[Max Filippov]

On Sun, Jul 24, 2016 at 9:00 AM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
> On 07/23/2016 05:45 PM, Max Filippov wrote:
>>
>> On Sun, Jul 24, 2016 at 3:24 AM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
>>>
>>> Commit 69d99e6c0d621f ("xtensa: Remove unnecessary of_platform_populate
>>> with default match table") dropped various include files from
>>> arch/xtensa/kernel/setup.c. This results in the following build error.
>>>
>>> arch/xtensa/kernel/setup.c: In function âxtensa_dt_io_areaâ:
>>> arch/xtensa/kernel/setup.c:213:2: error:
>>>          implicit declaration of function âof_read_ulongâ
>>>
>>> Fixes: 69d99e6c0d621f ("xtensa: Remove unnecessary of_platform_populate
>>> with default match table")
>>> Cc: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
>>> Cc: Rob Herring <robh@xxxxxxxxxx>
>>> Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
>>> ---
>>> I would suggest to merge this patch into the commit causing the problem
>>> if possible.
>>>
>>>   arch/xtensa/kernel/setup.c | 1 +
>>>   1 file changed, 1 insertion(+)
>>
>>
>> Acked-by: Max Filippov <jcmvbkbc@xxxxxxxxx>
>>
>
> Heads up: xtensa images build after this patch, but the image that
> previously failed to build (generic_kc705_defconfig) doesn't boot,
> at least not with qemu. I don't know if this is caused by 69d99e6c0d621f
> or by some other patch.

It seems to be booting, but serial console is non-functional.
With commit 69d99e6c0d621f ("xtensa: Remove unnecessary of_platform_populate
with default match table") I see the following message during boot:

[    6.375284] of_serial fd050020.serial: clk or clock-frequency not defined

Reverting that commit fixes serial console for me.
Any suggestions on what might go wrong?

-- 
Thanks.
-- Max