linux-kernel - Re: [PATCH v2] iio: light: tsl2563 change of_property_read to device_property

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Date:   Sun, 18 Oct 2020 12:35:35 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Vaishnav M A <vaishnav@...gleboard.org>
Cc:     knaack.h@....de, lars@...afoo.de, alexandru.ardelean@...log.com,
        nish.malpani25@...il.com, matt.ranostay@...sulko.com,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        jkridner@...gleboard.org, drew@...gleboard.org,
        robertcnelson@...gleboard.org, rajkovic@...roe.com
Subject: Re: [PATCH v2] iio: light: tsl2563 change of_property_read to
 device_property_read

On Sun, 18 Oct 2020 08:55:43 +0530
Vaishnav M A <vaishnav@...gleboard.org> wrote:

> replace the of_property_read_u32 for reading the amstaos,cover-comp-gain
> property with device_property_read_u32,allows the driver to
> get the properties information using the more generic device_property_*
> helpers and opens the possibility of passing the properties during
> platform instantiation of the device by a suitably populated
> struct property_entry.
> 
> Signed-off-by: Vaishnav M A <vaishnav@...gleboard.org>
Please tidy up that description in a similar fashion to I've suggested in
other reviews.  Code looks fine.

On another day I might have just fixed that description whilst applying but
we have lots of time at this point in the cycle, hence I'm bouncing
them back to you ;)

Thanks,

Jonathan

> ---
>  v2:
> 	- fix commit message
>  drivers/iio/light/tsl2563.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/iio/light/tsl2563.c b/drivers/iio/light/tsl2563.c
> index abc8d7db8dc1..1f1b8b7cefa4 100644
> --- a/drivers/iio/light/tsl2563.c
> +++ b/drivers/iio/light/tsl2563.c
> @@ -703,7 +703,6 @@ static int tsl2563_probe(struct i2c_client *client,
>  	struct iio_dev *indio_dev;
>  	struct tsl2563_chip *chip;
>  	struct tsl2563_platform_data *pdata = client->dev.platform_data;
> -	struct device_node *np = client->dev.of_node;
>  	int err = 0;
>  	u8 id = 0;
>  
> @@ -738,13 +737,14 @@ static int tsl2563_probe(struct i2c_client *client,
>  	chip->calib0 = tsl2563_calib_from_sysfs(CALIB_BASE_SYSFS);
>  	chip->calib1 = tsl2563_calib_from_sysfs(CALIB_BASE_SYSFS);
>  
> -	if (pdata)
> +	if (pdata) {
>  		chip->cover_comp_gain = pdata->cover_comp_gain;
> -	else if (np)
> -		of_property_read_u32(np, "amstaos,cover-comp-gain",
> -				     &chip->cover_comp_gain);
> -	else
> -		chip->cover_comp_gain = 1;
> +	} else {
> +		err = device_property_read_u32(&client->dev, "amstaos,cover-comp-gain",
> +					       &chip->cover_comp_gain);
> +		if (err)
> +			chip->cover_comp_gain = 1;
> +	}
>  
>  	dev_info(&client->dev, "model %d, rev. %d\n", id >> 4, id & 0x0f);
>  	indio_dev->name = client->name;