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iio: accel: mma9553: fix gpio bitnum init value

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Initial value of gpio bitnum is set to -1, but
the variable is declared as unsigned.

Use a positive invalid value for initial gpio
bitnum.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Suggested-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Irina Tirdea 2015-04-13 18:40:59 +03:00 committed by Jonathan Cameron
parent 334efd076d
commit ef8307a21a
1 changed files with 2 additions and 1 deletions
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3
drivers/iio/accel/mma9553.c
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@ -77,6 +77,7 @@
/* Bitnum used for GPIO configuration = bit number in high status byte */
#define MMA9553_STATUS_TO_BITNUM(bit) (ffs(bit) - 9)
#define MMA9553_MAX_BITNUM MMA9553_STATUS_TO_BITNUM(BIT(16))
#define MMA9553_DEFAULT_SAMPLE_RATE 30 /* Hz */
@ -406,8 +407,8 @@ static int mma9553_init(struct mma9553_data *data)
}
data->gpio_bitnum = -1;
/* Reset GPIO */
data->gpio_bitnum = MMA9553_MAX_BITNUM;
ret = mma9553_conf_gpio(data);
if (ret < 0)
return ret;