linux-kernel - Re: [PATCH v2] regulator: max20086: Make similar OF and ID table

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Message-ID: <20230904082117.GB8907@pendragon.ideasonboard.com>
Date:   Mon, 4 Sep 2023 11:21:17 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Biju Das <biju.das.jz@...renesas.com>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Biju Das <biju.das.au@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH v2] regulator: max20086: Make similar OF and ID table

Hi Biju,

On Mon, Sep 04, 2023 at 07:03:32AM +0000, Biju Das wrote:
> Subject: Re: [PATCH v2] regulator: max20086: Make similar OF and ID table
> > On Sun, Sep 03, 2023 at 04:42:57PM +0100, Biju Das wrote:
> > > Make similar OF and ID table to extend support for ID match using
> > > i2c_match_data(). Currently it works only for OF match tables as the
> > > driver_data is wrong for ID match.
> > 
> > If it's currently broken for the I2C ID table, let's drop it instead of
> > fixing it. We can always add it back when this device will appear on non-OF
> > systems, if it ever does. The max20086_dt_ids table would then not need to
> > be modified to extract the max20086_chip_info instances.
> 
> I am leaving this to respective maintainer to take a decision, whether
> to enhance the driver or drop broken support like DRM bridge driver
> (analogix-anx78xx?

I'm listed as the maintainer of the driver :-) I'd rather drop non-OF
support until needed as it doesn't work currently.

> > > While at it, drop blank lines before MODULE_DEVICE_TABLE* and remove
> > > trailing comma in the terminator entry for OF/ID table.
> > >
> > > Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
> > > ---
> > > Note:
> > >  This patch is only compile tested.
> > >
> > > v1->v2:
> > >  * Removed trailing comma in the terminator entry for OF/ID table.
> > > ---
> > >  drivers/regulator/max20086-regulator.c | 65
> > > ++++++++++++--------------
> > >  1 file changed, 31 insertions(+), 34 deletions(-)
> > >
> > > diff --git a/drivers/regulator/max20086-regulator.c
> > > b/drivers/regulator/max20086-regulator.c
> > > index 32f47b896fd1..59eb23d467ec 100644
> > > --- a/drivers/regulator/max20086-regulator.c
> > > +++ b/drivers/regulator/max20086-regulator.c
> > > @@ -223,7 +223,7 @@ static int max20086_i2c_probe(struct i2c_client *i2c)
> > >  		return -ENOMEM;
> > >
> > >  	chip->dev = &i2c->dev;
> > > -	chip->info = device_get_match_data(chip->dev);
> > > +	chip->info = i2c_get_match_data(i2c);
> > >
> > >  	i2c_set_clientdata(i2c, chip);
> > >
> > > @@ -275,45 +275,42 @@ static int max20086_i2c_probe(struct i2c_client
> > *i2c)
> > >  	return 0;
> > >  }
> > >
> > > -static const struct i2c_device_id max20086_i2c_id[] = {
> > > -	{ "max20086" },
> > > -	{ "max20087" },
> > > -	{ "max20088" },
> > > -	{ "max20089" },
> > > -	{ /* Sentinel */ },
> > > +static const struct max20086_chip_info max20086_chip_info = {
> > > +	.id = MAX20086_DEVICE_ID_MAX20086,
> > > +	.num_outputs = 4,
> > > +};
> > > +
> > > +static const struct max20086_chip_info max20087_chip_info = {
> > > +	.id = MAX20086_DEVICE_ID_MAX20087,
> > > +	.num_outputs = 4,
> > > +};
> > > +
> > > +static const struct max20086_chip_info max20088_chip_info = {
> > > +	.id = MAX20086_DEVICE_ID_MAX20088,
> > > +	.num_outputs = 2,
> > > +};
> > > +
> > > +static const struct max20086_chip_info max20089_chip_info = {
> > > +	.id = MAX20086_DEVICE_ID_MAX20089,
> > > +	.num_outputs = 2,
> > >  };
> > >
> > > +static const struct i2c_device_id max20086_i2c_id[] = {
> > > +	{ "max20086", (kernel_ulong_t)&max20086_chip_info },
> > > +	{ "max20087", (kernel_ulong_t)&max20087_chip_info },
> > > +	{ "max20088", (kernel_ulong_t)&max20088_chip_info },
> > > +	{ "max20089", (kernel_ulong_t)&max20089_chip_info },
> > > +	{ /* Sentinel */ }
> > > +};
> > >  MODULE_DEVICE_TABLE(i2c, max20086_i2c_id);
> > >
> > >  static const struct of_device_id max20086_dt_ids[] __maybe_unused = {
> > > -	{
> > > -		.compatible = "maxim,max20086",
> > > -		.data = &(const struct max20086_chip_info) {
> > > -			.id = MAX20086_DEVICE_ID_MAX20086,
> > > -			.num_outputs = 4,
> > > -		}
> > > -	}, {
> > > -		.compatible = "maxim,max20087",
> > > -		.data = &(const struct max20086_chip_info) {
> > > -			.id = MAX20086_DEVICE_ID_MAX20087,
> > > -			.num_outputs = 4,
> > > -		}
> > > -	}, {
> > > -		.compatible = "maxim,max20088",
> > > -		.data = &(const struct max20086_chip_info) {
> > > -			.id = MAX20086_DEVICE_ID_MAX20088,
> > > -			.num_outputs = 2,
> > > -		}
> > > -	}, {
> > > -		.compatible = "maxim,max20089",
> > > -		.data = &(const struct max20086_chip_info) {
> > > -			.id = MAX20086_DEVICE_ID_MAX20089,
> > > -			.num_outputs = 2,
> > > -		}
> > > -	},
> > > -	{ /* Sentinel */ },
> > > +	{ .compatible = "maxim,max20086", .data = &max20086_chip_info },
> > > +	{ .compatible = "maxim,max20087", .data = &max20087_chip_info },
> > > +	{ .compatible = "maxim,max20088", .data = &max20088_chip_info },
> > > +	{ .compatible = "maxim,max20089", .data = &max20089_chip_info },
> > > +	{ /* Sentinel */ }
> > >  };
> > > -
> > >  MODULE_DEVICE_TABLE(of, max20086_dt_ids);
> > >
> > >  static struct i2c_driver max20086_regulator_driver = {

-- 
Regards,

Laurent Pinchart