Re: [PATCH v2 2/2] ARM: dts: at91: disable the nxp,se97b SMBUS timeout on the TSE-850

Alexandre Belloni
2017-11-29T20:56:50Z

On 29/11/2017 at 12:53:11 -0800, Guenter Roeck wrote:
> On Mon, Nov 27, 2017 at 05:31:01PM +0100, Peter Rosin wrote:
> > The I2C adapter driver is sometimes slow, causing the SCL line to
> > be stuck low for more than the stipulated SMBUS timeout of 25-35 ms.
> > This causes the client device to give up which in turn causes silent
> > corruption of data. So, disable the SMBUS timeout in the client device.
> >
> > Signed-off-by: Peter Rosin <peda@axentia.se>
>
> Acked-by: Guenter Roeck <linux@roeck-us.net>
>
> I assume this will be sent upstream through an arm tree.
>

Yes, I'm applying it right now.

> Thanks,
> Guenter
>
> > ---
> > arch/arm/boot/dts/at91-tse850-3.dts | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/arch/arm/boot/dts/at91-tse850-3.dts b/arch/arm/boot/dts/at91-tse850-3.dts
> > index 5f29010cdbd8..9b82cc8843e1 100644
> > --- a/arch/arm/boot/dts/at91-tse850-3.dts
> > +++ b/arch/arm/boot/dts/at91-tse850-3.dts
> > @@ -221,6 +221,7 @@
> > jc42@18 {
> > compatible = "nxp,se97b", "jedec,jc-42.4-temp";
> > reg = <0x18>;
> > + smbus-timeout-disable;
> > };
> >
> > dpot: mcp4651-104@28 {
> > --
> > 2.11.0
> >

--
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering