[U-Boot] Banan Pro (ahci-sunxi) SATA port stopped working after switching to U-Boot v2016.01

[Hans de Goede]

Hi,

On 21-01-16 00:34, Markus Baier wrote:
> Am 19.01.2016 um 18:12 schrieb Tom Rini:
>  > On Sun, Jan 17, 2016 at 09:44:53PM +0100, Markus Baier wrote:
>  >
>  >> Hello,
>  >>
>  >> tonight I switched  to the new U-Boot v2016.01
>  >> on my Banana Pro system.
>  >> I compiled u-boot, like I did with all the working
>  >> versions before, with:
>  >> make Bananapro_defconfig
>  >> make
>  >>
>  >> But with the new U-Boot installed the SATA Port
>  >> did not work anymore.
>  >> The Kernel is the same 4.0.9-gentoo as I used before
>  >> with the last U-Boot Release v2015.10
>  >>
>  >> dmesg show me the following error in the kernel log:
>  >> [    1.925032] ahci-sunxi 1c18000.sata: PHY power up failed.
>  >> [    1.930661] ahci-sunxi: probe of 1c18000.sata failed with error -5
>  >>
>  >> I also see now SATA message at the U-Boot bootscreen,
>  >> the v2015.10 shows me that a SATA Port was recognized
>  >> by the U-Boot loader.
>  >
>  > Can you please use git bisect to determine which commit broke this?
>  > Thanks!
>
> Hi,
>
> thanks for the advice, I have found the bad commit,
> it is -> 02cc27c74f9b884b538bcd1b93342a4c05b5d608
> sunxi: power: Change axp209 LDO3 and LDO4 default to disabled
>
> after that I tried the v2016.01 release again, but changed
> the two lines in config AXP_ALDO3_VOLT and config AXP_ALDO4_VOLT
> back to their old values, now the SATA Port is working again.

Thanks for debugging this, according to the Bananapro schematic
VDD25-SATA either comes from a dedicated WL2003E25-5 linear regulator,
or it is connected to LDO4 via a 0 Ohm resistor.

So it would seem that in practice it seems that LDO4 is used, can you
give the attached patch a try ?

Regards,

Hans


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