RE: [PATCH v2 00/10] i2c: xiic: Add features, bug fixes.

[Raviteja Narayanam]

> -----Original Message-----
> From: Marek Vasut <marex@xxxxxxx>
> Sent: Friday, July 16, 2021 9:31 PM
> To: Michal Simek <michals@xxxxxxxxxx>; Raviteja Narayanam
> <rna@xxxxxxxxxx>; linux-i2c@xxxxxxxxxxxxxxx
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; git
> <git@xxxxxxxxxx>; joe@xxxxxxxxxxx
> Subject: Re: [PATCH v2 00/10] i2c: xiic: Add features, bug fixes.
> 
> On 6/28/21 9:23 AM, Michal Simek wrote:
> >
> >
> > On 6/26/21 12:27 PM, Raviteja Narayanam wrote:
> >> -Add 'standard mode' feature for reads > 255 bytes.
> >> -Add 'smbus block read' functionality.
> >> -Add 'xlnx,axi-iic-2.1' new IP version support.
> >> -Switch to 'AXI I2C standard mode' for i2c reads in affected IP versions.
> >> -Remove 'local_irq_save/restore' calls as discussed here:
> https://www.spinics.net/lists/linux-i2c/msg46483.html.
> >> -Some trivial fixes.
> >>
> >> Changes in v2:
> >> -Grouped the commits as fixes first and then features.
> >> -The first 4 commits fix the dynamic mode broken feature.
> >> -Corrected the indentation in coding style issues.
> >>
> >> Michal Simek (1):
> >>    i2c: xiic: Fix coding style issues
> >>
> >> Raviteja Narayanam (7):
> >>    i2c: xiic: Fix Tx Interrupt path for grouped messages
> >>    i2c: xiic: Add standard mode support for > 255 byte read transfers
> >>    i2c: xiic: Switch to Xiic standard mode for i2c-read
> >>    i2c: xiic: Remove interrupt enable/disable in Rx path
> >>    dt-bindings: i2c: xiic: Add 'xlnx,axi-iic-2.1' to compatible
> >>    i2c: xiic: Update compatible with new IP version
> >>    i2c: xiic: Add smbus_block_read functionality
> >>
> >> Shubhrajyoti Datta (2):
> >>    i2c: xiic: Return value of xiic_reinit
> >>    i2c: xiic: Fix the type check for xiic_wakeup
> >>
> >>   .../bindings/i2c/xlnx,xps-iic-2.00.a.yaml     |   4 +-
> >>   drivers/i2c/busses/i2c-xiic.c                 | 593 ++++++++++++++----
> >>   2 files changed, 487 insertions(+), 110 deletions(-)
> >>
> >
> > Acked-by: Michal Simek <michal.simek@xxxxxxxxxx>
> 
> I just tested this patchset on next-20210716 and the XIIC failures are still
> present, see:

The probe of ' atmel_mxt_ts' failed as per the error. May I know the details of
your test case if you tweaked any i2ctransfers/added delays. 
If it failed without adding anything, then please check whether the vivado design constraints
are correctly applied or not. 
Also check if the other devices on the bus are detected and i2ctransfer command is successful on them.
It would be helpful to know if the device ' atmel_mxt_ts' is successfully probed with next-20210716
without applying this patchset. 

I have tested this again on our boards with eeprom and other sensors, this is working fine for us.

Regards,
Raviteja N

> 
> xiic-i2c a0010000.i2c: mmio a0010000 irq 36 xiic-i2c a0120000.i2c: mmio
> a0120000 irq 38 atmel_mxt_ts 3-004a: supply vdda not found, using dummy
> regulator atmel_mxt_ts 3-004a: supply vdd not found, using dummy
> regulator
> 
> xiic-i2c a0120000.i2c: Timeout waiting at Tx empty
> 
> atmel_mxt_ts 3-004a: __mxt_read_reg: i2c transfer failed (-5) atmel_mxt_ts
> 3-004a: mxt_bootloader_read: i2c recv failed (-5) atmel_mxt_ts 3-004a:
> Trying alternate bootloader address atmel_mxt_ts 3-004a:
> mxt_bootloader_read: i2c recv failed (-5)
> atmel_mxt_ts: probe of 3-004a failed with error -5