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Commit 38125b2c authored by Alexandre Belloni's avatar Alexandre Belloni Committed by Jonathan Cameron
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iio: mxs-lradc: convert is_divided to a bitmap 



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

Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent aba70f2a

drivers/staging/iio/adc/mxs-lradc.c

+4 −4
Original line number Diff line number Diff line
@@ -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;

		}