linux-kernel - Re: [PATCH] i2c: i801: add lis3lv02d's I2C address for Vostro 5568

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Date:   Tue, 18 Oct 2022 20:00:51 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Jean Delvare <jdelvare@...e.de>
Cc:     Nam Cao <namcaov@...il.com>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c: i801: add lis3lv02d's I2C address for Vostro 5568

On Tuesday 18 October 2022 19:39:51 Jean Delvare wrote:
> On Thu, 06 Oct 2022 16:54:40 +0200, Nam Cao wrote:
> > Dell Vostro 5568 laptop has lis3lv02d, but its i2c address is not known
> > to the kernel. Add this address.
> > 
> > Output of "cat /sys/devices/platform/lis3lv02d/position" on Dell Vostro
> > 5568 laptop:
> >     - Horizontal: (-18,0,1044)
> >     - Front elevated: (522,-18,1080)
> >     - Left elevated: (-18,-360,1080)
> >     - Upside down: (36,108,-1134)
> > 
> > Signed-off-by: Nam Cao <namcaov@...il.com>
> > ---
> >  drivers/i2c/busses/i2c-i801.c | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
> > index a176296f4fff..e46561e095c6 100644
> > --- a/drivers/i2c/busses/i2c-i801.c
> > +++ b/drivers/i2c/busses/i2c-i801.c
> > @@ -1243,6 +1243,7 @@ static const struct {
> >  	 */
> >  	{ "Latitude 5480",      0x29 },
> >  	{ "Vostro V131",        0x1d },
> > +	{ "Vostro 5568",        0x29 },
> >  };
> >  
> >  static void register_dell_lis3lv02d_i2c_device(struct i801_priv *priv)
> 
> Fine with me.
> 
> Reviewed-by: Jean Delvare <jdelvare@...e.de>
> 
> Pali, OK with you?

Yes, nice to see that other people discovered another hidden hardware
devices in their own laptops :-)

Reviewed-by: Pali Rohár <pali@...nel.org>


Nam Cao, could you check your ACPI DSDT table if there is not specified
this smbus/i2c address 0x29? Autodiscovery would be better than
hardcoding. At least for E6440 I was told that BIOS does not provide it.

> -- 
> Jean Delvare
> SUSE L3 Support