I found the problem:
It was again dt definition.
Now nand section within gpmc requires:
compatible = "ti,omap2-nand";
Well there was some other changes, too, but I think above was what counted.
Now nand gets mounted/partitions mapped and reported.
Cheers,
Matti
2015-12-23 15:53 GMT+02:00 matti kaasinen <[email protected]>:
> Update:
> I made some debugging.
> Messages seem to come mostly from drivers/base/dd.c.
> Log message importance has been lowered from _info to _debug. That is why
> "probe deferral" message was not present in "rt-4.1" log.
> Now after adding more prints it seems that nand and some other devices
> like i2c are added to deferral list. They are re-probed successfully except
> nand (actually 50000000.gpmc). Only following lines come from deferred gpmc
> probe:
> [ 1.778365] platform 50000000.gpmc: Retrying from deferred list
> [ 1.778412] bus: 'platform': really_probe: probing driver omap-gpmc
> with device 50000000.gpmc
> [ 1.778828] omap-gpmc 50000000.gpmc: GPMC revision 6.0
> [ 1.778843] gpmc_mem_init: disabling cs 0 mapped at 0x0-0x1000000
>
> First two are lines that come when I changed dev_debug print functions to
> dev_info functions in deferred_probe_work_func and
> really_probe. Probing does not care about nand anymore.
>
> That's for now - I'm somewhat confused!
>
> Merry Christmas!
> -Matti
>
> 2015-12-22 16:22 GMT+02:00 matti kaasinen <[email protected]>:
>
>> Hi!
>>
>> I try to upgrade from linux-ti-staging-3.14 to .. -rt-4.1.
>>
>> Most of service seems to work after fiddling with device tree and kernel
>> configs. However, I just can't figure out why nand flash does not get
>> probed.
>> I don't get any error messages, some warnings, though.
>>
>> Clear differences are that rt-41 has emif message, but does not have
>> "probe deferral" message
>>
>> -------
>> rt-4.1
>> -------
>> [ 0.243614] omap-gpmc 50000000.gpmc: could not find pctldev for node
>> /ocp/l4_wkup@44c00000/scm@210000/pinmux@800/nandflash_pins_default,
>> deferring probe
>> ...
>> [ 1.296180] remoteproc0: Direct firmware load for
>> am335x-pm-firmware.elf failed with error -2
>> [ 1.300299] ti_emif_sram 4c000000.emif: Unable to get sram pool for
>> ocmcram
>> ...
>> [ 1.320653] omap-gpmc 50000000.gpmc: GPMC revision 6.0
>> [ 1.320668] gpmc_mem_init: disabling cs 0 mapped at 0x0-0x1000000
>> .....
>> no partition messages in log nor proper contents in /proc/mtd
>>
>> ------
>> 3.13
>> ------
>> [ 0.305249] omap-gpmc 50000000.gpmc: could not find pctldev for node
>> /pinmux@44e10800/nandflash_pins_default, deferring probe
>> [ 0.305307] platform 50000000.gpmc: Driver omap-gpmc requests probe
>> deferral
>> ....
>> [ 2.272467] omap-gpmc 50000000.gpmc: GPMC revision 6.0
>> [ 2.278170] gpmc_mem_init: disabling cs 0 mapped at 0x0-0x1000000
>> [ 2.286917] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda
>> [ 2.293595] nand: Micron MT29F2G08ABAEAWP
>> [ 2.297903] nand: 256MiB, SLC, page size: 2048, OOB size: 64
>> [ 2.303833] nand: using OMAP_ECC_BCH8_CODE_HW ECC scheme
>> [ 2.309991] 10 ofpart partitions found on MTD device omap2-nand.0
>> [ 2.316478] Creating 10 MTD partitions on "omap2-nand.0":
>> [ 2.322149] 0x000000000000-0x000000020000 : "NAND.SPL"
>> [ 2.334053] 0x000000020000-0x000000040000 : "NAND.SPL.backup1"
>> ...
>>
>> Do anyone else make sense out of this?
>>
>> Thanks,
>> Matti
>>
>
>
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