Re: Patch "syscon: Decrease driver registration priority" breaks clps711x target

Alexander Shiyan shc_work at mail.ru
Wed Jul 13 09:17:29 PDT 2016


>Среда, 13 июля 2016, 18:52 +03:00 от Andrey Smirnov <andrew.smirnov at gmail.com>:
>
>On Wed, Jul 13, 2016 at 6:04 AM, Sascha Hauer < s.hauer at pengutronix.de > wrote:
>> On Wed, Jul 13, 2016 at 10:37:11AM +0300, Alexander Shiyan wrote:
>>> Hello All.
>>>
>>> Patch "syscon: Decrease driver registration priority" breaks clps711x target.
>>> Previously, the syscon device initialized at "core_initcall", that did not cause problems.
>>> Now the device is initialized at "device_initcall" level, but clps711x uses syscon for
>>> the serial, so serial device initialized at "console_initcall" level.
>>> Any ideas?
>>
>> We could move syscon back to core_initcall level and in the syscon
>> driver use dev_get_resource() instead of request_iomem_region().
>
>Right now the driver uses both, so if we just drop the call to
>request_iomem_region that was problematic for me on i.MX6, that should
>resolve the issue. I think this would also bring the behavior of
>syscon driver closer to what it does in Linux kernel land. The only
>negative effect of that change I think would be that on the platforms
>where syscon driver controls that region of memory, it no longer would
>be reported as such by "iomem".
>
>Apologies for breaking your use-case, Alexander.

Andrey? Can you revert this and resend it in another way?

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