Hi Uwe!
On Sun, Nov 20, 2016 at 9:30 PM, Uwe Kleine-König
<uwe@xxxxxxxxxxxxxxxxx> wrote:
Hello Tomas,
On Sat, Nov 19, 2016 at 09:09:07PM +0100, tomas.hlavacek@xxxxxx wrote:
On Mon, Nov 14, 2016 at 9:28 PM, Andrew Lunn <andrew@xxxxxxx> wrote:
> Interrupts don't seem to work very well with the nxp,pca9538.
Which
> is probably why it is disabled by default.
I was thinking about this issue and I can remember that there was
an earlier
prototype that had a shared interrupt line from PHY (88E1514) and
from the
PCA9538. In this case we needed to specifically disable the
interrupt of the
PHY to release the interrupt line (which needed a hack into PHY
driver
code). The IRQ from PHY is connected as an ordinary input to
PCA9538 in
later board prototype. And the same holds for the production
version.
That would explain why I see an "irq but nobody cared" message when
booting the original system.
This isn't the problem I meant though. When adding interrupt-parent =
<&pcawan>; interrupts = <7 IRQ_TYPE_LEVEL_LOW>; to the phy node I get
an
error saying that there is no irq domain associated with this device.
Do you have CZ11NIC13 or older board revision?
CZ11NIC12 is indicated on my board.
:-( Well, this board version has wrongly matched length of some
differential pairs, IRQ from 88E1514 is connected differently, there
are slight differences in power supplies and (if I am not mistaken)
something changed in RTC support circuitry. It looks like a huge
mistake on our side.
Anyway I took your patch and tried few things:
- clean up comments
- add pca9538 interrupt-controller
- remove rtc disable (WFM with CZ11NIC13, which is the production board)
- add MBUS mem regions for CESA
- add IRQ for 88E1514 PHY - and there is a problem:
It seems that libphy is probed before pca9538 and we end up with:
[ 4.217550] libphy: orion_mdio_bus: probed
[ 4.221777] irq: no irq domain found for
/soc/internal-regs/i2c@11000/i2cmux@70/i2c@7/gpio@71 !
Any clue where to look in order to defer probing libphy or at least
orion_mdio_bus?
I'll post my version of the patch without the PHY IRQ (therefore
polling will kick in).
Thanks,
Tomas
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