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iio: mxs-lradc: convert is_divided to a bitmap

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mxs_lradc.is_divided was an unsigned long array. Convert it to a bitmap to save
some memory.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Alexandre Belloni 2013-12-23 17:48:00 +00:00 committed by Jonathan Cameron
parent aba70f2a58
commit 38125b2c93
1 changed files with 4 additions and 4 deletions
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8
drivers/staging/iio/adc/mxs-lradc.c
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@ -211,7 +211,7 @@ struct mxs_lradc {
const uint32_t *vref_mv;
struct mxs_lradc_scale scale_avail[LRADC_MAX_TOTAL_CHANS][2];
unsigned int is_divided[LRADC_MAX_TOTAL_CHANS];
unsigned long is_divided;
/*
* Touchscreen LRADC channels receives a private slot in the CTRL4
@ -920,7 +920,7 @@ static int mxs_lradc_read_raw(struct iio_dev *iio_dev,
*val = lradc->vref_mv[chan->channel];
*val2 = chan->scan_type.realbits -
lradc->is_divided[chan->channel];
test_bit(chan->channel, &lradc->is_divided);
return IIO_VAL_FRACTIONAL_LOG2;
case IIO_CHAN_INFO_OFFSET:
@ -965,14 +965,14 @@ static int mxs_lradc_write_raw(struct iio_dev *iio_dev,
/* divider by two disabled */
writel(1 << LRADC_CTRL2_DIVIDE_BY_TWO_OFFSET,
lradc->base + LRADC_CTRL2 + STMP_OFFSET_REG_CLR);
lradc->is_divided[chan->channel] = 0;
clear_bit(chan->channel, &lradc->is_divided);
ret = 0;
} else if (val == scale_avail[MXS_LRADC_DIV_ENABLED].integer &&
val2 == scale_avail[MXS_LRADC_DIV_ENABLED].nano) {
/* divider by two enabled */
writel(1 << LRADC_CTRL2_DIVIDE_BY_TWO_OFFSET,
lradc->base + LRADC_CTRL2 + STMP_OFFSET_REG_SET);
lradc->is_divided[chan->channel] = 1;
set_bit(chan->channel, &lradc->is_divided);
ret = 0;
}