linux-kernel - Re: [PATCH v4 05/26] staging: iio: tsl2583: remove redundant write to the control register in taos

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Message-ID: <bee2edfc-0ecf-19d7-ba74-68609c68e366@kernel.org>
Date:   Sun, 13 Nov 2016 12:06:34 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Brian Masney <masneyb@...tation.org>, linux-iio@...r.kernel.org
Cc:     devel@...verdev.osuosl.org, gregkh@...uxfoundation.org,
        lars@...afoo.de, pmeerw@...erw.net, knaack.h@....de,
        linux-kernel@...r.kernel.org, Jon.Brenner@....com
Subject: Re: [PATCH v4 05/26] staging: iio: tsl2583: remove redundant write to
 the control register in taos_probe()

On 12/11/16 18:19, Brian Masney wrote:
> taos_probe() calls i2c_smbus_write_byte() to select the control
> register, however there are no subsequent calls to
> i2c_smbus_read_byte(). The write call is unnecessary and is removed by
> this patch.
> 
> Verified that the driver still functions correctly using a TSL2581
> hooked up to a Raspberry Pi 2.
> 
> Signed-off-by: Brian Masney <masneyb@...tation.org>
Applied.

Thanks,
> ---
>  drivers/staging/iio/light/tsl2583.c | 8 --------
>  1 file changed, 8 deletions(-)
> 
> diff --git a/drivers/staging/iio/light/tsl2583.c b/drivers/staging/iio/light/tsl2583.c
> index 5a32102..449506b 100644
> --- a/drivers/staging/iio/light/tsl2583.c
> +++ b/drivers/staging/iio/light/tsl2583.c
> @@ -788,14 +788,6 @@ static int taos_probe(struct i2c_client *clientp,
>  		return -EINVAL;
>  	}
>  
> -	ret = i2c_smbus_write_byte(clientp, (TSL258X_CMD_REG | TSL258X_CNTRL));
> -	if (ret < 0) {
> -		dev_err(&clientp->dev,
> -			"i2c_smbus_write_byte() to cmd reg failed in taos_probe(), err = %d\n",
> -			ret);
> -		return ret;
> -	}
> -
>  	indio_dev->info = &tsl2583_info;
>  	indio_dev->channels = tsl2583_channels;
>  	indio_dev->num_channels = ARRAY_SIZE(tsl2583_channels);
>