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Diffstat (limited to 'drivers/iio/adc')
-rw-r--r--drivers/iio/adc/ad799x.c4
-rw-r--r--drivers/iio/adc/ad_sigma_delta.c17
-rw-r--r--drivers/iio/adc/at91_adc.c28
-rw-r--r--drivers/iio/adc/max1027.c8
-rw-r--r--drivers/iio/adc/xilinx-xadc-core.c2
5 files changed, 40 insertions, 19 deletions
diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c
index 9704090b7908..cd6dbe95125b 100644
--- a/drivers/iio/adc/ad799x.c
+++ b/drivers/iio/adc/ad799x.c
@@ -817,10 +817,10 @@ static int ad799x_probe(struct i2c_client *client,
ret = ad799x_write_config(st, st->chip_config->default_config);
if (ret < 0)
- goto error_disable_reg;
+ goto error_disable_vref;
ret = ad799x_read_config(st);
if (ret < 0)
- goto error_disable_reg;
+ goto error_disable_vref;
st->config = ret;
ret = iio_triggered_buffer_setup(indio_dev, NULL,
diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c
index 22c4c17cd996..30f200ad6b97 100644
--- a/drivers/iio/adc/ad_sigma_delta.c
+++ b/drivers/iio/adc/ad_sigma_delta.c
@@ -62,7 +62,7 @@ int ad_sd_write_reg(struct ad_sigma_delta *sigma_delta, unsigned int reg,
struct spi_transfer t = {
.tx_buf = data,
.len = size + 1,
- .cs_change = sigma_delta->bus_locked,
+ .cs_change = sigma_delta->keep_cs_asserted,
};
struct spi_message m;
int ret;
@@ -121,6 +121,7 @@ static int ad_sd_read_reg_raw(struct ad_sigma_delta *sigma_delta,
if (sigma_delta->info->has_registers) {
data[0] = reg << sigma_delta->info->addr_shift;
data[0] |= sigma_delta->info->read_mask;
+ data[0] |= sigma_delta->comm;
spi_message_add_tail(&t[0], &m);
}
spi_message_add_tail(&t[1], &m);
@@ -216,6 +217,7 @@ static int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta,
spi_bus_lock(sigma_delta->spi->master);
sigma_delta->bus_locked = true;
+ sigma_delta->keep_cs_asserted = true;
reinit_completion(&sigma_delta->completion);
ret = ad_sigma_delta_set_mode(sigma_delta, mode);
@@ -233,9 +235,10 @@ static int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta,
ret = 0;
}
out:
+ sigma_delta->keep_cs_asserted = false;
+ ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_IDLE);
sigma_delta->bus_locked = false;
spi_bus_unlock(sigma_delta->spi->master);
- ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_IDLE);
return ret;
}
@@ -287,6 +290,7 @@ int ad_sigma_delta_single_conversion(struct iio_dev *indio_dev,
spi_bus_lock(sigma_delta->spi->master);
sigma_delta->bus_locked = true;
+ sigma_delta->keep_cs_asserted = true;
reinit_completion(&sigma_delta->completion);
ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_SINGLE);
@@ -296,9 +300,6 @@ int ad_sigma_delta_single_conversion(struct iio_dev *indio_dev,
ret = wait_for_completion_interruptible_timeout(
&sigma_delta->completion, HZ);
- sigma_delta->bus_locked = false;
- spi_bus_unlock(sigma_delta->spi->master);
-
if (ret == 0)
ret = -EIO;
if (ret < 0)
@@ -314,7 +315,10 @@ out:
sigma_delta->irq_dis = true;
}
+ sigma_delta->keep_cs_asserted = false;
ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_IDLE);
+ sigma_delta->bus_locked = false;
+ spi_bus_unlock(sigma_delta->spi->master);
mutex_unlock(&indio_dev->mlock);
if (ret)
@@ -351,6 +355,8 @@ static int ad_sd_buffer_postenable(struct iio_dev *indio_dev)
spi_bus_lock(sigma_delta->spi->master);
sigma_delta->bus_locked = true;
+ sigma_delta->keep_cs_asserted = true;
+
ret = ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_CONTINUOUS);
if (ret)
goto err_unlock;
@@ -379,6 +385,7 @@ static int ad_sd_buffer_postdisable(struct iio_dev *indio_dev)
sigma_delta->irq_dis = true;
}
+ sigma_delta->keep_cs_asserted = false;
ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_IDLE);
sigma_delta->bus_locked = false;
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index e3e2155b0386..dd9f2280927b 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -704,23 +704,29 @@ static int at91_adc_read_raw(struct iio_dev *idev,
ret = wait_event_interruptible_timeout(st->wq_data_avail,
st->done,
msecs_to_jiffies(1000));
- if (ret == 0)
- ret = -ETIMEDOUT;
- if (ret < 0) {
- mutex_unlock(&st->lock);
- return ret;
- }
-
- *val = st->last_value;
+ /* Disable interrupts, regardless if adc conversion was
+ * successful or not
+ */
at91_adc_writel(st, AT91_ADC_CHDR,
AT91_ADC_CH(chan->channel));
at91_adc_writel(st, AT91_ADC_IDR, BIT(chan->channel));
- st->last_value = 0;
- st->done = false;
+ if (ret > 0) {
+ /* a valid conversion took place */
+ *val = st->last_value;
+ st->last_value = 0;
+ st->done = false;
+ ret = IIO_VAL_INT;
+ } else if (ret == 0) {
+ /* conversion timeout */
+ dev_err(&idev->dev, "ADC Channel %d timeout.\n",
+ chan->channel);
+ ret = -ETIMEDOUT;
+ }
+
mutex_unlock(&st->lock);
- return IIO_VAL_INT;
+ return ret;
case IIO_CHAN_INFO_SCALE:
*val = st->vref_mv;
diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c
index 712fbd2b1f16..ec3f7bc70b75 100644
--- a/drivers/iio/adc/max1027.c
+++ b/drivers/iio/adc/max1027.c
@@ -471,6 +471,14 @@ static int max1027_probe(struct spi_device *spi)
goto fail_dev_register;
}
+ /* Internal reset */
+ st->reg = MAX1027_RST_REG;
+ ret = spi_write(st->spi, &st->reg, 1);
+ if (ret < 0) {
+ dev_err(&indio_dev->dev, "Failed to reset the ADC\n");
+ return ret;
+ }
+
/* Disable averaging */
st->reg = MAX1027_AVG_REG;
ret = spi_write(st->spi, &st->reg, 1);
diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c
index 56cf5907a5f0..143894a315d9 100644
--- a/drivers/iio/adc/xilinx-xadc-core.c
+++ b/drivers/iio/adc/xilinx-xadc-core.c
@@ -1299,7 +1299,7 @@ static int xadc_remove(struct platform_device *pdev)
}
free_irq(irq, indio_dev);
clk_disable_unprepare(xadc->clk);
- cancel_delayed_work(&xadc->zynq_unmask_work);
+ cancel_delayed_work_sync(&xadc->zynq_unmask_work);
kfree(xadc->data);
kfree(indio_dev->channels);
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-30 12:07:30 +0000