[U-Boot] [PATCH] Add CONFIG_GMAC_TX_DELAY=4 for OlinuXino Lime2

[Hans de Goede <hdegoede@redhat.com>]

Hi,

On 17-03-16 22:53, Michael Haas wrote:
> On 03/17/2016 11:52 AM, Hans de Goede wrote:
>> Hi,
>>
>> There are 3 things which would be interesting to save and compare
>> with a boot which does have the problem:
>>
>> 1) The gmc clk register, to do this download mmio_dump from:
>>
>>
>
> Working GBit:
> 01c20164: 00000c06
>
> Broken GBit:
> tomorrow :)
>
>>
>> 2) The pmic settings for various ldo-s, etc. as root run:
>>
>> i2cdump -f -y 0 0x34
>> And record the output. You may need to
>> install i2c-tools (or the deb. alternative) and
>> do "modprobe i2c_dev"
>>
>
> I had to download the Debian kernel package on another box, extract the
> .ko, transfer and insmod it. Now I'm getting:
>
> ~ # /mnt/usr/sbin/i2cdump -f -y 0 0x34
> No size specified (using byte-data access)
> Error: Could not open file `/dev/i2c-0': No such device
>
>
> I did mknod the devices, but I'm getting the same error msg:
>
>
> ~ # ls -al /dev/i2c-*
> crw-r--r--    1 root     root       89,   0 Mar 17 21:31 /dev/i2c-0
> crw-r--r--    1 root     root       89,   1 Mar 17 21:31 /dev/i2c-1
> ~ #
>
> Module                  Size  Used by
> i2c_dev                 7087  0
> i2c_sun6i_p2wi          3664  0
> dm_mod                 98419  0
> md_mod                121938  0
> jfs                   175313  0
> crc32c_generic          1862  1
> btrfs                1068047  0
> xor                     4846  1 btrfs
> zlib_deflate           20354  1 btrfs
> raid6_pq               87885  1 btrfs
> vfat                   10249  0
> fat                    55086  1 vfat
> ext4                  552524  2
> crc16                   1274  1 ext4
> mbcache                 9623  1 ext4
> jbd2                   96157  1 ext4
> usb_storage            45523  0
> ahci_sunxi              2851  0
> libahci_platform        6430  1 ahci_sunxi
> libahci                23066  2 libahci_platform,ahci_sunxi
> libata                182871  3 libahci,libahci_platform,ahci_sunxi
> scsi_mod              188073  2 usb_storage,libata
> realtek                 2711  0
> dwmac_sunxi             2431  0
> stmmac_platform         3302  1 dwmac_sunxi
> stmmac                 74687  3 stmmac_platform,dwmac_sunxi
> ohci_platform           4658  0
> ohci_hcd               38045  1 ohci_platform
> ehci_platform           5398  0
> ehci_hcd               63999  1 ehci_platform
> usbcore               190581  5
> usb_storage,ohci_platform,ohci_hcd,ehci_hcd,ehci_platform
> usb_common              3195  1 usbcore
> phy_sun4i_usb           7858  8
> extcon                 10436  1 phy_sun4i_usb
> sunxi_mmc              11288  0
> leds_gpio               3606  0
>
>
> I also loaded i2c_sun6i_p2wi  for good measure. Any idea what's missing
> here?

Maybe i2c-mv64xxx is a module with the Debian kernel ? That would be
bad because that would mean that we cannot communicate to the pmic
until the i2c-mv64xxx module is loaded. OTOH not having a pmic
driver talking to the pmic may explain why things work on this
particular sdcard :)

To check if that module is loaded and initialized do:

ls /sys/bus/i2c/devices

You should see at least a i2c-0 there. After the modprobe
of that driver, check dmesg for any axp messages if you're
getting some then the loading of the driver causes the pmic
driver to talk to the device (iow the pmic driver is present
already) if this happens, I would double check the gbit, because
the loading of the pmic driver may change things.

Regards,

Hans



>
>> 3) The phy settings, unfortunately I do not know of
>> a way to dump these, so lets just forget about these
>> and focus on the other 2.
>>
> I might even look at the data sheet tomorrow if time permits.
>
> Michael
>
>