linux-kernel - Re: [PATCH] iio: light: stk3310: add chip id for STK3311-X variant

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Message-ID: <20200714104441.nrnaauqunjst67ix@core.my.home>
Date:   Tue, 14 Jul 2020 12:44:41 +0200
From:   Ondřej Jirman <megous@...ous.com>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Icenowy Zheng <icenowy@...c.io>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Luca Weiss <luca@...tu.xyz>,
        "open list:IIO SUBSYSTEM AND DRIVERS" <linux-iio@...r.kernel.org>
Subject: Re: [PATCH] iio: light: stk3310: add chip id for STK3311-X variant

Hello Jonathan,

On Sat, Jul 04, 2020 at 05:29:16PM +0100, Jonathan Cameron wrote:
> On Fri,  3 Jul 2020 21:44:05 +0200
> Ondrej Jirman <megous@...ous.com> wrote:
> 
> > From: Icenowy Zheng <icenowy@...c.io>
> > 
> > The STK3311 chip has a variant called STK3311-X, which has a different
> > chip id of 0x12.
> > 
> > Add the chip id to the driver.
> > 
> > Signed-off-by: Icenowy Zheng <icenowy@...c.io>
> > Signed-off-by: Ondrej Jirman <megous@...ous.com>
> 
> Given this is clearly not quite compatible with the stk3311 probably
> best to also add a an id to the of id table.  Any idea what else
> is different?

I've looked at it more, and there's no stk3311 either. It always has
some suffix, like -sa -9 -a -wv -x, .... So I don't think a new
ID in the table is neccessary. The driver can differentiate based on
chip id, in case it will ever become necessary.

regards,
	o.

> Thanks,
> 
> Jonathan
> 
> > ---
> >  drivers/iio/light/stk3310.c | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
> > index 185c24a75ae6..1a8401d198a4 100644
> > --- a/drivers/iio/light/stk3310.c
> > +++ b/drivers/iio/light/stk3310.c
> > @@ -37,6 +37,7 @@
> >  
> >  #define STK3310_CHIP_ID_VAL			0x13
> >  #define STK3311_CHIP_ID_VAL			0x1D
> > +#define STK3311X_CHIP_ID_VAL			0x12
> >  #define STK3335_CHIP_ID_VAL			0x51
> >  #define STK3310_PSINT_EN			0x01
> >  #define STK3310_PS_MAX_VAL			0xFFFF
> > @@ -453,6 +454,7 @@ static int stk3310_init(struct iio_dev *indio_dev)
> >  
> >  	if (chipid != STK3310_CHIP_ID_VAL &&
> >  	    chipid != STK3311_CHIP_ID_VAL &&
> > +	    chipid != STK3311X_CHIP_ID_VAL &&
> >  	    chipid != STK3335_CHIP_ID_VAL) {
> >  		dev_err(&client->dev, "invalid chip id: 0x%x\n", chipid);
> >  		return -ENODEV;
>