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iio: adc: vf610: fix the adc register read fail issue

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Read the register only when the adc register address is 4 byte aligned.
(rather than the other way around).

Signed-off-by: Haibo Chen <haibo.chen@freescale.com>
Signed-off-by: Fugang Duan <B38611@freescale.com>
Cc: <Stable.vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Fugang Duan 2015-07-16 14:49:09 +08:00 committed by Jonathan Cameron
parent c68a67b7ad
commit bf604a4c44
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/adc/vf610_adc.c
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@ -635,7 +635,7 @@ static int vf610_adc_reg_access(struct iio_dev *indio_dev,
struct vf610_adc *info = iio_priv(indio_dev); struct vf610_adc *info = iio_priv(indio_dev);
if ((readval == NULL) || if ((readval == NULL) ||
(!(reg % 4) || (reg > VF610_REG_ADC_PCTL))) ((reg % 4) || (reg > VF610_REG_ADC_PCTL)))
return -EINVAL; return -EINVAL;
*readval = readl(info->regs + reg); *readval = readl(info->regs + reg);