linux-kernel - [PATCH 9/9] staging: iio: tsl2583: remove redundant write to the control register in taos

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Date:   Thu,  3 Nov 2016 08:56:20 -0400
From:   Brian Masney <masneyb@...tation.org>
To:     jic23@...nel.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: [PATCH 9/9] staging: iio: tsl2583: remove redundant write to the control register in taos_probe()

taos_probe() calls i2c_smbus_write_byte() to select the control
register, however there is 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>
---
 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 8c8361d..e80c027 100644
--- a/drivers/staging/iio/light/tsl2583.c
+++ b/drivers/staging/iio/light/tsl2583.c
@@ -781,14 +781,6 @@ 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);
-- 
2.5.5