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Date:   Tue, 12 May 2020 17:34:34 +0300
From:   Grygorii Strashko <grygorii.strashko@...com>
To:     Tony Lindgren <tony@...mide.com>
CC:     Arnd Bergmann <arnd@...db.de>, <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Russell King <linux@...linux.org.uk>,
        <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
        Clay McClure <clay@...mons.net>, Dan Murphy <dmurphy@...com>
Subject: Re: [PATCH net v4] net: ethernet: ti: Remove TI_CPTS_MOD workaround



On 12/05/2020 17:22, Tony Lindgren wrote:
> Hi,
> 
> * Grygorii Strashko <grygorii.strashko@...com> [200512 10:03]:
>> From: Clay McClure <clay@...mons.net>
>>
>> My recent commit b6d49cab44b5 ("net: Make PTP-specific drivers depend on
>> PTP_1588_CLOCK") exposes a missing dependency in defconfigs that select
>> TI_CPTS without selecting PTP_1588_CLOCK, leading to linker errors of the
>> form:
>>
>> drivers/net/ethernet/ti/cpsw.o: in function `cpsw_ndo_stop':
>> cpsw.c:(.text+0x680): undefined reference to `cpts_unregister'
>>   ...
>>
>> That's because TI_CPTS_MOD (which is the symbol gating the _compilation_ of
>> cpts.c) now depends on PTP_1588_CLOCK, and so is not enabled in these
>> configurations, but TI_CPTS (which is the symbol gating _calls_ to the cpts
>> functions) _is_ enabled. So we end up compiling calls to functions that
>> don't exist, resulting in the linker errors.
>>
>> This patch fixes build errors and restores previous behavior by:
>>   - ensure PTP_1588_CLOCK=y in TI specific configs and CPTS will be built
>>   - remove TI_CPTS_MOD and, instead, add dependencies from CPTS in
>>     TI_CPSW/TI_KEYSTONE_NETCP/TI_CPSW_SWITCHDEV as below:
>>
>>     config TI_CPSW_SWITCHDEV
>>     ...
>>      depends on TI_CPTS || !TI_CPTS
>>
>>     which will ensure proper dependencies PTP_1588_CLOCK -> TI_CPTS ->
>> TI_CPSW/TI_KEYSTONE_NETCP/TI_CPSW_SWITCHDEV and build type selection.
>>
>> Note. For NFS boot + CPTS all of above configs have to be built-in.
> 
> This builds and boots on BBB and beagle x15 with NFSroot so:
> 
> Tested-by: Tony Lindgren <tony@...mide.com>
> 

Thank you for testing.

> However, there's at least one more issue left that shows up at least
> on ti81xx dra62x-j5eco-evm on v5.7-rc5 that has commit b46b2b7ba6e1
> ("ARM: dts: Fix dm814x Ethernet by changing to use rgmii-id mode").
> 
> I think this is a different issue though, any ideas?
> 

This seems like completely different issue.
Could we have separate thread started for this, pls?

-- 
Best regards,
grygorii

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