linux-kernel - Re: [PATCH v3 2/5] iio: light: vcnl4000 add devicetree hooks

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Message-ID: <20190324171930.7580e6bb@archlinux>
Date:   Sun, 24 Mar 2019 17:19:30 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     "Angus Ainslie (Purism)" <angus@...ea.ca>
Cc:     Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Tomas Novotny <tomas@...otny.cz>, linux-iio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/5] iio: light: vcnl4000 add devicetree hooks

On Thu, 21 Mar 2019 08:40:44 -0700
"Angus Ainslie (Purism)" <angus@...ea.ca> wrote:

> Add an of_match table for devicetree probing.
> 
> Signed-off-by: Angus Ainslie (Purism) <angus@...ea.ca>

I made a small tweak (see inline) for an issue I'd missed
previously (which is pretty obscure!)

Jonathan
> ---
>  drivers/iio/light/vcnl4000.c | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
> 
> diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c
> index 5e0a8eb83ebc..308cb2d2b641 100644
> --- a/drivers/iio/light/vcnl4000.c
> +++ b/drivers/iio/light/vcnl4000.c
> @@ -363,9 +363,31 @@ static int vcnl4000_probe(struct i2c_client *client,
>  	return devm_iio_device_register(&client->dev, indio_dev);
>  }
>  
> +static const struct of_device_id vcnl_4000_of_match[] = {
> +	{
> +		.compatible = "vishay,vcnl4000",
> +		.data = "VCNL4000",
> +	},
> +	{
> +		.compatible = "vishay,vcnl4010",
> +		.data = "VCNL4010",
> +	},
> +	{
> +		.compatible = "vishay,vcnl4010",
> +		.data = "VCNL4020",
> +	},
> +	{
> +		.compatible = "vishay,vcnl4200",
> +		.data = "VCNL4200",
> +	},
> +	{},
> +};
> +MODULE_DEVICE_TABLE(of, vcnl4000_of_match);
> +
>  static struct i2c_driver vcnl4000_driver = {
>  	.driver = {
>  		.name   = VCNL4000_DRV_NAME,
> +		.of_match_table = of_match_ptr(vcnl_4000_of_match),
Ah. I'd missed this previously.  Don't use the of_match_ptr
magic anymore. It prevents ACPI probing via the weird
DSDT entry that basically says "here be devicetree".
>  	},
>  	.probe  = vcnl4000_probe,
>  	.id_table = vcnl4000_id,