[PATCH v1 1/2] ARM: keystone: dts: fix dt bindings for PCIe

Murali Karicheri m-karicheri2 at ti.com
Fri Jul 17 06:01:50 PDT 2015

On 07/16/2015 06:43 PM, santosh.shilimkar at oracle.com wrote:
> On 7/16/15 2:51 PM, Murali Karicheri wrote:
>> Currently PCIe DT bindings are broken. PCIe driver can't function
>> without having a SerDes driver that provide the phy configuration.
>> On K2E EVM, this causes problem since the EVM has Marvell SATA
>> controller present and with default values in the SerDes register,
>> it seems to pass the PCIe link check, but causes issues since
>> the configuration is not correct. The manifestation is that when
>> EVM is booted with NFS rootfs, the boot hangs. We shouldn't enable
>> PCIe on this EVM since to work, SerDes driver has to be present as
>> well. So by default, the PCIe DT binding should be disabled in SoC
>> specific DTS. It can be enabled in the board specific DTS when the
>> SerDes device driver is also present.
>> So fix the status of PCIe DT bindings in the SoC specific DTS to
>> "disabled". To enable PCIe, the status should be set to "ok" in
>> the EVM DTS file when SerDes driver support becomes available in
>> the upstream tree.
>> Signed-off-by: Murali Karicheri <m-karicheri2 at ti.com>
>> ---
>>   - updated commit description to make it clear that it is fix
>>     to be applied to v4.2-rc.
> Just sent pull request with both of these patches from the series.
> Regards,
> Santosh
Thanks Santosh.


Murali Karicheri
Linux Kernel, Keystone

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