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FMC ADC 100M 14b 4cha - Software
Commit aca0aa8a authored by Federico Vaga's avatar Federico Vaga
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drv: compute user DAC offset aside 

Signed-off-by: Federico Vaga's avatarFederico Vaga <federico.vaga@cern.ch>
parent f4c3552b
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Showing with 18 additions and 5 deletions
kernel/fa-core.c
View file @ aca0aa8a
......@@ -185,6 +185,23 @@ static int zfad_offset_to_dac(struct zio_channel *chan,
#define DAC_SAT_LOW -5000000
#define DAC_SAT_UP 5000000
static int fa_dac_offset_get(struct fa_dev *fa, unsigned int chan)
{
int32_t off_uv = fa->user_offset[chan] + fa->zero_offset[chan];
if (off_uv < DAC_SAT_LOW) {
dev_err(&fa->pdev->dev, "DAC lower saturation %d\n",
DAC_SAT_LOW);
off_uv = DAC_SAT_LOW;
}
if (off_uv > DAC_SAT_UP) {
dev_err(&fa->pdev->dev, "DAC upper saturation %d\n",
DAC_SAT_UP);
off_uv = DAC_SAT_UP;
}
return off_uv;
}
/*
* zfad_apply_user_offset
* @chan: the channel where apply offset
......@@ -198,14 +215,10 @@ static int zfad_offset_to_dac(struct zio_channel *chan,
int zfad_apply_offset(struct zio_channel *chan)
{
struct fa_dev *fa = get_zfadc(&chan->cset->zdev->head.dev);
int32_t off_uv;
int32_t off_uv = fa_dac_offset_get(fa, chan->index);
int hwval;
int range;
off_uv = fa->user_offset[chan->index] + fa->zero_offset[chan->index];
if (off_uv < DAC_SAT_LOW || off_uv > DAC_SAT_UP)
return -EINVAL;
spin_lock(&fa->zdev->cset->lock);
range = fa->range[chan->index];
spin_unlock(&fa->zdev->cset->lock);
......
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