staging/iio/mxs-lradc: fix preenable for multiple buffers
This fixes 'preenable failed: -EINVAL' error when using this driver. Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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c7b0cf3e71
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c80712c793
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@ -690,7 +690,6 @@ static void mxs_lradc_trigger_remove(struct iio_dev *iio)
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static int mxs_lradc_buffer_preenable(struct iio_dev *iio)
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{
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struct mxs_lradc *lradc = iio_priv(iio);
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struct iio_buffer *buffer = iio->buffer;
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int ret = 0, chan, ofs = 0;
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unsigned long enable = 0;
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uint32_t ctrl4_set = 0;
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@ -698,7 +697,7 @@ static int mxs_lradc_buffer_preenable(struct iio_dev *iio)
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uint32_t ctrl1_irq = 0;
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const uint32_t chan_value = LRADC_CH_ACCUMULATE |
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((LRADC_DELAY_TIMER_LOOP - 1) << LRADC_CH_NUM_SAMPLES_OFFSET);
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const int len = bitmap_weight(buffer->scan_mask, LRADC_MAX_TOTAL_CHANS);
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const int len = bitmap_weight(iio->active_scan_mask, LRADC_MAX_TOTAL_CHANS);
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if (!len)
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return -EINVAL;
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@ -725,7 +724,7 @@ static int mxs_lradc_buffer_preenable(struct iio_dev *iio)
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lradc->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR);
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writel(0xff, lradc->base + LRADC_CTRL0 + STMP_OFFSET_REG_CLR);
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for_each_set_bit(chan, buffer->scan_mask, LRADC_MAX_TOTAL_CHANS) {
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for_each_set_bit(chan, iio->active_scan_mask, LRADC_MAX_TOTAL_CHANS) {
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ctrl4_set |= chan << LRADC_CTRL4_LRADCSELECT_OFFSET(ofs);
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ctrl4_clr |= LRADC_CTRL4_LRADCSELECT_MASK(ofs);
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ctrl1_irq |= LRADC_CTRL1_LRADC_IRQ_EN(ofs);
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