linux-kernel - Re: [PATCH] ARM: dts: BCM5301X: Fix I2C controller interrupt

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Date:   Wed, 27 Oct 2021 22:32:42 +0200
From:   Christian Lamparter <chunkeey@...il.com>
To:     Florian Fainelli <f.fainelli@...il.com>,
        linux-arm-kernel@...ts.infradead.org
Cc:     mnhagan88@...il.com, Hauke Mehrtens <hauke@...ke-m.de>,
        Rafał Miłecki <zajec5@...il.com>,
        "maintainer:BROADCOM BCM5301X ARM ARCHITECTURE" 
        <bcm-kernel-feedback-list@...adcom.com>,
        Rob Herring <robh+dt@...nel.org>,
        Jon Mason <jonmason@...adcom.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: dts: BCM5301X: Fix I2C controller interrupt

On 27/10/2021 21:37, Florian Fainelli wrote:
> The I2C interrupt controller line is off by 32 because the datasheet
> describes interrupt inputs into the GIC which are for Shared Peripheral
> Interrupts and are starting at offset 32. The ARM GIC binding expects
> the SPI interrupts to be numbered from 0 relative to the SPI base.
 >
> Fixes: bb097e3e0045 ("ARM: dts: BCM5301X: Add I2C support to the DT")
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>

Thank you! This fixed the MR32 iproc-i2c issue.
It's working now (will post the patch for the MR32 tomorrow):

# cat /proc/interrupts
            CPU0       CPU1
  24:          1          0     GIC-0  27 Edge      gt
  25:     110418     108252     GIC-0  29 Edge      twd
  26:        476          0     GIC-0 117 Level     gpio, ttyS0
  31:        128          0     GIC-0 121 Level     18009000.i2c <--- YES!
  32:      49477          0     GIC-0 100 Level     brcmnand
  33:          0          0     GIC-0 109 Level     mspi_done
  34:          0          0     GIC-0 110 Level     mspi_halted
  35:          0          0     GIC-0 104 Level     spi_lr_fullness_reached
  36:          0          0     GIC-0 105 Level     spi_lr_session_aborted
  37:          0          0     GIC-0 106 Level     spi_lr_impatient
  38:          0          0     GIC-0 107 Level     spi_lr_session_done
  40:       7227          0     GIC-0 179 Level     eth2
  51:          0          0  BCMA-GPIO  21 Edge      keys

and the attached AT24 + PoE-Power monitor can be probed + read as before.

[   12.042576] at24 0-0050: 8192 byte 24c64 EEPROM, read-only
...
[   12.077671] ina2xx 0-0045: power monitor ina219 (Rshunt = 60000 uOhm)

Tested-by: Christian Lamparter <chunkeey@...il.com>


Regards
Christian