On Tue, Mar 21, 2023 at 09:40:07PM +0100, H. Nikolaus Schaller wrote:
> Hi Patrik,
>
> > Am 19.03.2023 um 23:39 schrieb Patrik Dahlström <risca@xxxxxxxxxxxxxx>:
> >
> > The palmas gpadc block has support for monitoring up to 2 ADC channels
> > and issue an interrupt if they reach past a set threshold. The gpadc
> > driver had limited support for this through the adc_wakeup{1,2}_data
> > platform data. This however only allow a fixed threshold to be set at
> > boot, and would only enable it when entering sleep mode.
> >
> > This change hooks into the IIO events system and exposes to userspace
> > the ability to configure threshold values for each channel individually,
> > but only allow up to 2 such thresholds to be enabled at any given time.
> >
> > The logic around suspend and resume had to be adjusted so that user
> > space configuration don't get reset on resume. Instead, any configured
> > adc auto wakeup gets enabled during probe.
> >
> > Enabling a threshold from userspace will overwrite the adc wakeup
> > configuration set during probe. Depending on how you look at it, this
> > could also mean we allow userspace to update the adc wakeup thresholds.
> >
> > Signed-off-by: Patrik Dahlström <risca@xxxxxxxxxxxxxx>
> > ---
> > drivers/iio/adc/palmas_gpadc.c | 495 +++++++++++++++++++++++++++++----
> > 1 file changed, 438 insertions(+), 57 deletions(-)
> >
> > diff --git a/drivers/iio/adc/palmas_gpadc.c b/drivers/iio/adc/palmas_gpadc.c
> > index 24d7c096e4b8..84c6e3b66205 100644
> > --- a/drivers/iio/adc/palmas_gpadc.c
> > +++ b/drivers/iio/adc/palmas_gpadc.c
> > @@ -20,6 +20,7 @@
> > #include <linux/completion.h>
> > #include <linux/of.h>
> > #include <linux/of_device.h>
> > +#include <linux/iio/events.h>
> > #include <linux/iio/iio.h>
> > #include <linux/iio/machine.h>
> > #include <linux/iio/driver.h>
> > @@ -76,6 +77,16 @@ static struct palmas_gpadc_info palmas_gpadc_info[] = {
> > PALMAS_ADC_INFO(IN15, 0, 0, 0, 0, INVALID, INVALID, true),
> > };
> >
> > +struct palmas_gpadc_thresholds {
> > + int high_thresh;
> > + int low_thresh;
> > +};
> > +
> > +struct palmas_adc_event {
> > + int channel;
> > + enum iio_event_direction direction;
> > +};
> > +
> > /*
> > * struct palmas_gpadc - the palmas_gpadc structure
> > * @ch0_current: channel 0 current source setting
> > @@ -117,8 +128,30 @@ struct palmas_gpadc {
> > bool wakeup2_enable;
> > int auto_conversion_period;
> > struct mutex lock;
> > + struct palmas_adc_event event0;
> > + struct palmas_adc_event event1;
> > + struct palmas_gpadc_thresholds thresh_data[PALMAS_ADC_CH_MAX];
> > };
> >
> > +static struct palmas_adc_event *palmas_gpadc_get_event_channel(
> > + struct palmas_gpadc *adc, int adc_chan, enum iio_event_direction dir)
> > +{
> > + if (adc_chan == adc->event0.channel && dir == adc->event0.direction)
> > + return &adc->event0;
> > +
> > + if (adc_chan == adc->event1.channel && dir == adc->event1.direction)
> > + return &adc->event1;
> > +
> > + return NULL;
> > +}
> > +
> > +static bool palmas_gpadc_channel_is_freerunning(struct palmas_gpadc *adc,
> > + int adc_chan)
> > +{
> > + return palmas_gpadc_get_event_channel(adc, adc_chan, IIO_EV_DIR_RISING) ||
> > + palmas_gpadc_get_event_channel(adc, adc_chan, IIO_EV_DIR_FALLING);
> > +}
> > +
> > /*
> > * GPADC lock issue in AUTO mode.
> > * Impact: In AUTO mode, GPADC conversion can be locked after disabling AUTO
> > @@ -188,11 +221,24 @@ static irqreturn_t palmas_gpadc_irq(int irq, void *data)
> >
> > static irqreturn_t palmas_gpadc_irq_auto(int irq, void *data)
> > {
> > - struct palmas_gpadc *adc = data;
> > + struct iio_dev *indio_dev = data;
> > + struct palmas_gpadc *adc = iio_priv(indio_dev);
> > + struct palmas_adc_event *ev;
> >
> > dev_dbg(adc->dev, "Threshold interrupt %d occurs\n", irq);
> > palmas_disable_auto_conversion(adc);
> >
> > + ev = (irq == adc->irq_auto_0) ? &adc->event0 : &adc->event1;
> > + if (ev->channel != -1) {
> > + enum iio_event_direction dir;
> > + u64 code;
> > +
> > + dir = ev->direction;
> > + code = IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, ev->channel,
> > + IIO_EV_TYPE_THRESH, dir);
> > + iio_push_event(indio_dev, code, iio_get_time_ns(indio_dev));
> > + }
> > +
> > return IRQ_HANDLED;
> > }
> >
> > @@ -280,6 +326,9 @@ static int palmas_gpadc_read_prepare(struct palmas_gpadc *adc, int adc_chan)
> > {
> > int ret;
> >
> > + if (palmas_gpadc_channel_is_freerunning(adc, adc_chan))
> > + return 0; // ADC already running
> > +
> > ret = palmas_gpadc_enable(adc, adc_chan, true);
> > if (ret < 0)
> > return ret;
> > @@ -339,28 +388,44 @@ static int palmas_gpadc_start_conversion(struct palmas_gpadc *adc, int adc_chan)
> > unsigned int val;
> > int ret;
> >
> > - init_completion(&adc->conv_completion);
> > - ret = palmas_update_bits(adc->palmas, PALMAS_GPADC_BASE,
> > - PALMAS_GPADC_SW_SELECT,
> > - PALMAS_GPADC_SW_SELECT_SW_START_CONV0,
> > - PALMAS_GPADC_SW_SELECT_SW_START_CONV0);
> > - if (ret < 0) {
> > - dev_err(adc->dev, "SELECT_SW_START write failed: %d\n", ret);
> > - return ret;
> > - }
> > + if (palmas_gpadc_channel_is_freerunning(adc, adc_chan)) {
> > + int event = (adc_chan == adc->event0.channel) ? 0 : 1;
> > + unsigned int reg = (event == 0) ?
> > + PALMAS_GPADC_AUTO_CONV0_LSB :
> > + PALMAS_GPADC_AUTO_CONV1_LSB;
> >
> > - ret = wait_for_completion_timeout(&adc->conv_completion,
> > - PALMAS_ADC_CONVERSION_TIMEOUT);
> > - if (ret == 0) {
> > - dev_err(adc->dev, "conversion not completed\n");
> > - return -ETIMEDOUT;
> > + ret = palmas_bulk_read(adc->palmas, PALMAS_GPADC_BASE,
> > + reg, &val, 2);
> > + if (ret < 0) {
> > + dev_err(adc->dev, "AUTO_CONV%x_LSB read failed: %d\n",
> > + event, ret);
> > + return ret;
> > + }
> > }
> > + else {
> > + init_completion(&adc->conv_completion);
> > + ret = palmas_update_bits(adc->palmas, PALMAS_GPADC_BASE,
> > + PALMAS_GPADC_SW_SELECT,
> > + PALMAS_GPADC_SW_SELECT_SW_START_CONV0,
> > + PALMAS_GPADC_SW_SELECT_SW_START_CONV0);
> > + if (ret < 0) {
> > + dev_err(adc->dev, "SELECT_SW_START write failed: %d\n", ret);
> > + return ret;
> > + }
> >
> > - ret = palmas_bulk_read(adc->palmas, PALMAS_GPADC_BASE,
> > - PALMAS_GPADC_SW_CONV0_LSB, &val, 2);
> > - if (ret < 0) {
> > - dev_err(adc->dev, "SW_CONV0_LSB read failed: %d\n", ret);
> > - return ret;
> > + ret = wait_for_completion_timeout(&adc->conv_completion,
> > + PALMAS_ADC_CONVERSION_TIMEOUT);
> > + if (ret == 0) {
> > + dev_err(adc->dev, "conversion not completed\n");
> > + return -ETIMEDOUT;
> > + }
> > +
> > + ret = palmas_bulk_read(adc->palmas, PALMAS_GPADC_BASE,
> > + PALMAS_GPADC_SW_CONV0_LSB, &val, 2);
> > + if (ret < 0) {
> > + dev_err(adc->dev, "SW_CONV0_LSB read failed: %d\n", ret);
> > + return ret;
> > + }
> > }
> >
> > ret = val & 0xFFF;
> > @@ -385,6 +450,80 @@ static int palmas_gpadc_get_calibrated_code(struct palmas_gpadc *adc,
> > return val;
> > }
> >
> > +static int palmas_gpadc_get_high_threshold_raw(struct palmas_gpadc *adc,
> > + struct palmas_adc_event *ev)
> > +{
> > + const int INL = 2;
> > + const int adc_chan = ev->channel;
> > + const int orig = adc->thresh_data[adc_chan].high_thresh;
> > + int val = orig;
> > + int gain_drift;
> > + int offset_drift;
> > +
> > + if (!val)
> > + return 0;
>
> What is the reason to make val = 0 a special handling?
> IMHO this makes the threshold levels discontinuous.
These patches has gone through a couple of internal revisions already, and
one of the early versions used threshold == 0 to mean that the event was
disabled.
I will re-visit the threshold calculations and update for v2.
>
> > +
> > + val = (val * 1000) / adc->adc_info[adc_chan].gain;
> > +
> > + if (!adc->adc_info[adc_chan].is_uncalibrated) {
> > + val = (val * adc->adc_info[adc_chan].gain_error +
> > + adc->adc_info[adc_chan].offset) /
>
> here it would make a difference for val == 0 and offset != 0
>
> > + 1000;
> > + gain_drift = 1002;
> > + offset_drift = 2;
>
> where do these magic constants come from?
If I remember correctly, they where taken from one of the many datasheets
that had fractions of information available for this chip. I will document
the variables and add references in v2.
>
> > + }
> > + else {
> > + gain_drift = 1022;
> > + offset_drift = 36;
>
> same here.
>
> > + }
> > +
> > + // add tolerance to threshold
> > + val = ((val + INL) * gain_drift) / 1000 + offset_drift;
>
> here it would make a difference for val == 0.
>
> > +
> > + // clamp to max possible value
> > + if (val > 0xFFF)
> > + val = 0xFFF;
> > +
> > + return val;
> > +}
> > +
> > +static int palmas_gpadc_get_low_threshold_raw(struct palmas_gpadc *adc,
> > + struct palmas_adc_event *ev)
> > +{
> > + const int INL = 2;
> > + const int adc_chan = ev->channel;
> > + const int orig = adc->thresh_data[adc_chan].low_thresh;
> > + int val = orig;
> > + int gain_drift;
> > + int offset_drift;
> > +
> > + if (!val)
> > + return val;
>
> same here. And why return val and not 0 as above?
Yes, that indeed seem odd.
>
> > +
> > + val = (val * 1000) / adc->adc_info[adc_chan].gain;
> > +
> > + if (!adc->adc_info[adc_chan].is_uncalibrated) {
> > + val = (val * adc->adc_info[adc_chan].gain_error -
> > + adc->adc_info[adc_chan].offset) /
> > + 1000;
> > + gain_drift = 998;
> > + offset_drift = 2;
> > + }
> > + else {
> > + gain_drift = 978;
> > + offset_drift = 36;
>
> same here - how are they related to the constants in
> palmas_gpadc_get_high_threshold_raw() ?
>
> > + }
> > +
> > + // calculate tolerances
> > + val = ((val - INL) * gain_drift) / 1000 - offset_drift;
> > +
> > + // clamp to minimum 0
> > + if (val < 0)
> > + val = 0;
> > +
> > + return val;
> > +}
> > +
> > static int palmas_gpadc_read_raw(struct iio_dev *indio_dev,
> > struct iio_chan_spec const *chan, int *val, int *val2, long mask)
> > {
> > @@ -431,8 +570,239 @@ static int palmas_gpadc_read_raw(struct iio_dev *indio_dev,
> > return ret;
> > }
> >
> > +static int palmas_gpadc_read_event_config(struct iio_dev *indio_dev,
> > + const struct iio_chan_spec *chan, enum iio_event_type type,
> > + enum iio_event_direction dir)
> > +{
> > + struct palmas_gpadc *adc = iio_priv(indio_dev);
> > + int adc_chan = chan->channel;
> > + int ret = 0;
> > +
> > + if (adc_chan > PALMAS_ADC_CH_MAX || type != IIO_EV_TYPE_THRESH)
> > + return -EINVAL;
> > +
> > + mutex_lock(&adc->lock);
> > +
> > + if (palmas_gpadc_get_event_channel(adc, adc_chan, dir)) {
> > + ret = 1;
> > + }
> > +
> > + mutex_unlock(&adc->lock);
> > +
> > + return ret;
> > +}
> > +
> > +static void palmas_adc_event_to_wakeup(struct palmas_gpadc *adc,
> > + struct palmas_adc_event *ev,
> > + struct palmas_adc_wakeup_property *wakeup)
> > +{
> > + wakeup->adc_channel_number = ev->channel;
> > + if (ev->direction == IIO_EV_DIR_RISING) {
> > + wakeup->adc_low_threshold = 0;
> > + wakeup->adc_high_threshold =
> > + palmas_gpadc_get_high_threshold_raw(adc, &adc->event0);
> > + }
> > + else {
> > + wakeup->adc_low_threshold =
> > + palmas_gpadc_get_low_threshold_raw(adc, &adc->event0);
> > + wakeup->adc_high_threshold = 0;
> > + }
> > +}
> > +
> > +static int palmas_adc_wakeup_configure(struct palmas_gpadc *adc);
> > +static int palmas_adc_wakeup_reset(struct palmas_gpadc *adc);
> > +
> > +static int palmas_gpadc_reconfigure_event_channels(struct palmas_gpadc *adc)
> > +{
> > + bool was_enabled = adc->wakeup1_enable || adc->wakeup2_enable;
> > + bool enable;
> > +
> > + adc->wakeup1_enable = adc->event0.channel == -1 ? false : true;
> > + adc->wakeup2_enable = adc->event1.channel == -1 ? false : true;
> > +
> > + enable = adc->wakeup1_enable || adc->wakeup2_enable;
> > + if (!was_enabled && enable)
> > + device_wakeup_enable(adc->dev);
> > + else if (was_enabled && !enable)
> > + device_wakeup_disable(adc->dev);
> > +
> > + if (!enable)
> > + return palmas_adc_wakeup_reset(adc);
> > +
> > + // adjust levels
> > + if (adc->wakeup1_enable)
> > + palmas_adc_event_to_wakeup(adc, &adc->event0, &adc->wakeup1_data);
> > + if (adc->wakeup2_enable)
> > + palmas_adc_event_to_wakeup(adc, &adc->event1, &adc->wakeup2_data);
> > +
> > + return palmas_adc_wakeup_configure(adc);
> > +}
> > +
> > +static int palmas_gpadc_enable_event_config(struct palmas_gpadc *adc,
> > + const struct iio_chan_spec *chan, enum iio_event_direction dir)
> > +{
> > + struct palmas_adc_event *ev;
> > + int adc_chan = chan->channel;
> > +
> > + if (palmas_gpadc_get_event_channel(adc, adc_chan, dir))
> > + /* already enabled */
> > + return 0;
> > +
> > + if (adc->event0.channel == -1)
> > + ev = &adc->event0;
> > + else if (adc->event1.channel == -1) {
> > + /* event0 has to be the lowest channel */
> > + if (adc_chan < adc->event0.channel) {
> > + adc->event1 = adc->event0;
> > + ev = &adc->event0;
> > + }
> > + else
> > + ev = &adc->event1;
> > + }
> > + else /* both AUTO channels already in use */ {
> > + dev_warn(adc->dev, "event0 - %d, event1 - %d\n",
> > + adc->event0.channel, adc->event1.channel);
> > + return -EBUSY;
> > + }
> > +
> > + ev->channel = adc_chan;
> > + ev->direction = dir;
> > +
> > + return palmas_gpadc_reconfigure_event_channels(adc);
> > +}
> > +
> > +static int palmas_gpadc_disable_event_config(struct palmas_gpadc *adc,
> > + const struct iio_chan_spec *chan, enum iio_event_direction dir)
> > +{
> > + int adc_chan = chan->channel;
> > + struct palmas_adc_event *ev =
> > + palmas_gpadc_get_event_channel(adc, adc_chan, dir);
> > +
> > + if (!ev)
> > + return 0;
> > +
> > + if (ev == &adc->event0) {
> > + adc->event0 = adc->event1;
> > + ev = &adc->event1;
> > + }
> > +
> > + ev->channel = -1;
> > + ev->direction = IIO_EV_DIR_NONE;
> > +
> > + return palmas_gpadc_reconfigure_event_channels(adc);
> > +}
> > +
> > +static int palmas_gpadc_write_event_config(struct iio_dev *indio_dev,
> > + const struct iio_chan_spec *chan, enum iio_event_type type,
> > + enum iio_event_direction dir, int state)
> > +{
> > + struct palmas_gpadc *adc = iio_priv(indio_dev);
> > + int adc_chan = chan->channel;
> > + int ret = 0;
> > +
> > + if (adc_chan > PALMAS_ADC_CH_MAX || type != IIO_EV_TYPE_THRESH)
> > + return -EINVAL;
> > +
> > + mutex_lock(&adc->lock);
> > +
> > + if (state)
> > + ret = palmas_gpadc_enable_event_config(adc, chan, dir);
> > + else
> > + ret = palmas_gpadc_disable_event_config(adc, chan, dir);
> > +
> > + mutex_unlock(&adc->lock);
> > +
> > + return ret;
> > +}
> > +
> > +static int palmas_gpadc_read_event_value(struct iio_dev *indio_dev,
> > + const struct iio_chan_spec *chan, enum iio_event_type type,
> > + enum iio_event_direction dir, enum iio_event_info info, int *val,
> > + int *val2)
> > +{
> > + struct palmas_gpadc *adc = iio_priv(indio_dev);
> > + int adc_chan = chan->channel;
> > + int ret = 0;
> > +
> > + if (adc_chan > PALMAS_ADC_CH_MAX || type != IIO_EV_TYPE_THRESH)
> > + return -EINVAL;
> > +
> > + mutex_lock(&adc->lock);
> > +
> > + switch (info) {
> > + case IIO_EV_INFO_VALUE:
> > + *val = (dir == IIO_EV_DIR_RISING) ?
> > + adc->thresh_data[adc_chan].high_thresh :
> > + adc->thresh_data[adc_chan].low_thresh;
> > + ret = IIO_VAL_INT;
> > + break;
> > + default:
> > + ret = -EINVAL;
> > + break;
> > + }
> > +
> > + mutex_unlock(&adc->lock);
> > +
> > + return ret;
> > +}
> > +
> > +static int palmas_gpadc_write_event_value(struct iio_dev *indio_dev,
> > + const struct iio_chan_spec *chan, enum iio_event_type type,
> > + enum iio_event_direction dir, enum iio_event_info info, int val,
> > + int val2)
> > +{
> > + struct palmas_gpadc *adc = iio_priv(indio_dev);
> > + int adc_chan = chan->channel;
> > + int ret = 0;
> > +
> > + if (adc_chan > PALMAS_ADC_CH_MAX || type != IIO_EV_TYPE_THRESH)
> > + return -EINVAL;
> > +
> > + mutex_lock(&adc->lock);
> > + switch (info) {
> > + case IIO_EV_INFO_VALUE:
> > + if (val < 0 || val > 0xFFF) {
> > + ret = -EINVAL;
> > + break;
> > + }
> > + if (dir == IIO_EV_DIR_RISING)
> > + adc->thresh_data[adc_chan].high_thresh = val;
> > + else
> > + adc->thresh_data[adc_chan].low_thresh = val;
> > + break;
> > + default:
> > + ret = -EINVAL;
> > + break;
> > + }
> > +
> > + if (palmas_gpadc_get_event_channel(adc, adc_chan, dir))
> > + ret = palmas_gpadc_reconfigure_event_channels(adc);
> > +
> > + mutex_unlock(&adc->lock);
> > +
> > + return ret;
> > +}
> > +
> > static const struct iio_info palmas_gpadc_iio_info = {
> > .read_raw = palmas_gpadc_read_raw,
> > + .read_event_config = palmas_gpadc_read_event_config,
> > + .write_event_config = palmas_gpadc_write_event_config,
> > + .read_event_value = palmas_gpadc_read_event_value,
> > + .write_event_value = palmas_gpadc_write_event_value,
> > +};
> > +
> > +static const struct iio_event_spec palmas_gpadc_events[] = {
> > + {
> > + .type = IIO_EV_TYPE_THRESH,
> > + .dir = IIO_EV_DIR_RISING,
> > + .mask_separate = BIT(IIO_EV_INFO_VALUE) |
> > + BIT(IIO_EV_INFO_ENABLE),
> > + }, {
> > + .type = IIO_EV_TYPE_THRESH,
> > + .dir = IIO_EV_DIR_FALLING,
> > + .mask_separate = BIT(IIO_EV_INFO_VALUE) |
> > + BIT(IIO_EV_INFO_ENABLE),
> > + },
> > };
> >
> > #define PALMAS_ADC_CHAN_IIO(chan, _type, chan_info) \
> > @@ -443,6 +813,8 @@ static const struct iio_info palmas_gpadc_iio_info = {
> > BIT(chan_info), \
> > .indexed = 1, \
> > .channel = PALMAS_ADC_CH_##chan, \
> > + .event_spec = palmas_gpadc_events, \
> > + .num_event_specs = ARRAY_SIZE(palmas_gpadc_events) \
> > }
> >
> > static const struct iio_chan_spec palmas_gpadc_iio_channel[] = {
> > @@ -492,9 +864,12 @@ static int palmas_gpadc_get_adc_dt_data(struct platform_device *pdev,
> > return 0;
> > }
> >
> > -static void palmas_disable_wakeup(void *dev)
> > +static void palmas_disable_wakeup(void *data)
> > {
> > - device_wakeup_disable(dev);
> > + struct palmas_gpadc *adc = data;
> > +
> > + if (adc->wakeup1_enable || adc->wakeup2_enable)
> > + device_wakeup_disable(adc->dev);
> > }
> >
> > static int palmas_gpadc_probe(struct platform_device *pdev)
> > @@ -547,36 +922,49 @@ static int palmas_gpadc_probe(struct platform_device *pdev)
> > return dev_err_probe(adc->dev, ret,
> > "request irq %d failed\n", adc->irq);
> >
> > + adc->irq_auto_0 = platform_get_irq(pdev, 1);
> > + if (adc->irq_auto_0 < 0)
> > + return dev_err_probe(adc->dev, adc->irq_auto_0,
> > + "get auto0 irq failed\n");
> > +
> > + ret = devm_request_threaded_irq(&pdev->dev, adc->irq_auto_0, NULL,
> > + palmas_gpadc_irq_auto, IRQF_ONESHOT,
> > + "palmas-adc-auto-0", indio_dev);
> > + if (ret < 0)
> > + return dev_err_probe(adc->dev, ret,
> > + "request auto0 irq %d failed\n",
> > + adc->irq_auto_0);
> > +
> > + adc->irq_auto_1 = platform_get_irq(pdev, 2);
> > + if (adc->irq_auto_1 < 0)
> > + return dev_err_probe(adc->dev, adc->irq_auto_1,
> > + "get auto1 irq failed\n");
> > +
> > + ret = devm_request_threaded_irq(&pdev->dev, adc->irq_auto_1, NULL,
> > + palmas_gpadc_irq_auto, IRQF_ONESHOT,
> > + "palmas-adc-auto-1", indio_dev);
> > + if (ret < 0)
> > + return dev_err_probe(adc->dev, ret,
> > + "request auto1 irq %d failed\n",
> > + adc->irq_auto_1);
> > +
> > if (gpadc_pdata->adc_wakeup1_data) {
> > memcpy(&adc->wakeup1_data, gpadc_pdata->adc_wakeup1_data,
> > sizeof(adc->wakeup1_data));
> > adc->wakeup1_enable = true;
> > - adc->irq_auto_0 = platform_get_irq(pdev, 1);
> > - ret = devm_request_threaded_irq(&pdev->dev, adc->irq_auto_0,
> > - NULL, palmas_gpadc_irq_auto,
> > - IRQF_ONESHOT,
> > - "palmas-adc-auto-0", adc);
> > - if (ret < 0)
> > - return dev_err_probe(adc->dev, ret,
> > - "request auto0 irq %d failed\n",
> > - adc->irq_auto_0);
> > }
> >
> > if (gpadc_pdata->adc_wakeup2_data) {
> > memcpy(&adc->wakeup2_data, gpadc_pdata->adc_wakeup2_data,
> > sizeof(adc->wakeup2_data));
> > adc->wakeup2_enable = true;
> > - adc->irq_auto_1 = platform_get_irq(pdev, 2);
> > - ret = devm_request_threaded_irq(&pdev->dev, adc->irq_auto_1,
> > - NULL, palmas_gpadc_irq_auto,
> > - IRQF_ONESHOT,
> > - "palmas-adc-auto-1", adc);
> > - if (ret < 0)
> > - return dev_err_probe(adc->dev, ret,
> > - "request auto1 irq %d failed\n",
> > - adc->irq_auto_1);
> > }
> >
> > + adc->event0.channel = -1;
> > + adc->event0.direction = IIO_EV_DIR_NONE;
> > + adc->event1.channel = -1;
> > + adc->event1.direction = IIO_EV_DIR_NONE;
> > +
> > /* set the current source 0 (value 0/5/15/20 uA => 0..3) */
> > if (gpadc_pdata->ch0_current <= 1)
> > adc->ch0_current = PALMAS_ADC_CH0_CURRENT_SRC_0;
> > @@ -610,20 +998,23 @@ static int palmas_gpadc_probe(struct platform_device *pdev)
> > return dev_err_probe(adc->dev, ret,
> > "iio_device_register() failed\n");
> >
> > - device_set_wakeup_capable(&pdev->dev, 1);
> > for (i = 0; i < PALMAS_ADC_CH_MAX; i++) {
> > if (!(adc->adc_info[i].is_uncalibrated))
> > palmas_gpadc_calibrate(adc, i);
> > }
> >
> > + device_set_wakeup_capable(&pdev->dev, 1);
> > if (adc->wakeup1_enable || adc->wakeup2_enable) {
> > - device_wakeup_enable(&pdev->dev);
> > - ret = devm_add_action_or_reset(&pdev->dev,
> > - palmas_disable_wakeup,
> > - &pdev->dev);
> > + ret = palmas_adc_wakeup_configure(adc);
> > if (ret)
> > return ret;
> > + device_wakeup_enable(&pdev->dev);
> > }
> > + ret = devm_add_action_or_reset(&pdev->dev,
> > + palmas_disable_wakeup,
> > + adc);
> > + if (ret)
> > + return ret;
> >
> > return 0;
> > }
> > @@ -755,16 +1146,11 @@ static int palmas_gpadc_suspend(struct device *dev)
> > {
> > struct iio_dev *indio_dev = dev_get_drvdata(dev);
> > struct palmas_gpadc *adc = iio_priv(indio_dev);
> > - int wakeup = adc->wakeup1_enable || adc->wakeup2_enable;
> > int ret;
> >
> > - if (!device_may_wakeup(dev) || !wakeup)
> > + if (!device_may_wakeup(dev))
> > return 0;
> >
> > - ret = palmas_adc_wakeup_configure(adc);
> > - if (ret < 0)
> > - return ret;
> > -
> > if (adc->wakeup1_enable)
> > enable_irq_wake(adc->irq_auto_0);
> >
> > @@ -778,16 +1164,11 @@ static int palmas_gpadc_resume(struct device *dev)
> > {
> > struct iio_dev *indio_dev = dev_get_drvdata(dev);
> > struct palmas_gpadc *adc = iio_priv(indio_dev);
> > - int wakeup = adc->wakeup1_enable || adc->wakeup2_enable;
> > int ret;
> >
> > - if (!device_may_wakeup(dev) || !wakeup)
> > + if (!device_may_wakeup(dev))
> > return 0;
> >
> > - ret = palmas_adc_wakeup_reset(adc);
> > - if (ret < 0)
> > - return ret;
> > -
> > if (adc->wakeup1_enable)
> > disable_irq_wake(adc->irq_auto_0);
> >
> > --
> > 2.25.1
> >
>
>
>
