i2c almost working for me, was Re: i2c still not working for me

[Emmanuel Vadot]

On Tue, 16 Apr 2019 09:16:02 +0300
Daniel Braniss <danny at cs.huji.ac.il> wrote:

> 
> 
> > On 11 Apr 2019, at 09:56, Daniel Braniss <danny at cs.huji.ac.il> wrote:
> > 
> > if no device is connected, I2CRDWR hangs, 
> > it also happens with i2c(8) -s, only reboot helps.
> > 
> > ichb1: twsi_reset: Using IIC_FASTEST/UNKNOWN mode with speed param=2a
> > iichb1: TWSI_WRITE: Writing 0 to 18
> > iichb1: TWSI_WRITE: Writing 2a to 14
> > iichb1: TWSI_WRITE: Writing 40 to c
> > iichb1: TWSI_WRITE: Writing c4 to c
> > iichb1: twsi_transfer: transmitting 2 messages
> > iichb1: TWSI_READ: read f8 from 10
> > iichb1: twsi_transfer: status=f8
> > iichb1: twsi_transfer: msg[0] flags: 0
> > iichb1: twsi_transfer: msg[0] len: 9
> > iichb1: TWSI_WRITE: Writing e4 to c
> > 
> > and now it?s hung
> [?]

 I don't see that on my OrangePi One or Pine64-LTS.

> 
> even with a working device, this happens sometimes:
> 
> my app gets ENXIO from the ioctl(fd, I2CRDWR, &data) and on the console:
> ?
> gic0: Spurious interrupt detected: last irq: 38 on CPU2
> gic0: Spurious interrupt detected: last irq: 38 on CPU2
> gic0: Spurious interrupt detected: last irq: 38 on CPU2
> gic0: Spurious interrupt detected: last irq: 29 on CPU2
> gic0: Spurious interrupt detected: last irq: 29 on CPU2
> gic0: Spurious interrupt detected: last irq: 38 on CPU2
> gic0: Spurious interrupt detected: last irq: 29 on CPU2
> gic0: Spurious interrupt detected: last irq: 38 on CPU2
> gic0: Spurious interrupt detected: last irq: 29 on CPU2
> gic0: Spurious interrupt detected: last irq: 38 on CPU2
> gic0: Spurious interrupt detected: last irq: 38 on CPU2
> gic0: Spurious interrupt detected: last irq: 38 on CPU2
> gic0: Spurious interrupt detected: last irq: 38 on CPU2
> gic0: Spurious interrupt detected: last irq: 38 on CPU2
> gic0: Spurious interrupt detected: last irq: 38 on CPU2
> gic0: Spurious interrupt detected: last irq: 38 on CPU2
> gic0: Spurious interrupt detected: last irq: 38 on CPU2
> gic0: Spurious interrupt detected: last irq: 29 on CPU2
> gic0: Spurious interrupt detected: last irq: 29 on CPU2
> gic0: Spurious interrupt detected: last irq: 29 on CPU2
> 
> the good news: my app is killable :-)

 I would need more details for this.

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-- 
Emmanuel Vadot <manu at bidouilliste.com> <manu at freebsd.org>