* [PATCH] iio: accel: bmc150: decouple buffer and triggers
@ 2015-05-12 14:03 Vlad Dogaru
2015-05-12 16:17 ` Octavian Purdila
0 siblings, 1 reply; 4+ messages in thread
From: Vlad Dogaru @ 2015-05-12 14:03 UTC (permalink / raw)
To: jic23, octavian.purdila, linux-iio; +Cc: Vlad Dogaru
If the interrupt pins are not available, we should still be able to use
the buffer with an external trigger. However, we won't be able to use
the hardware fifo since we have no means of signalling when the
watermark is reached.
I also added a comment to indicate that the timestamps in
bmc150_accel_data are only used for hardware fifo, since initially I was
confused about duplication with pf->timestamp.
Signed-off-by: Vlad Dogaru <vlad.dogaru@intel.com>
---
drivers/iio/accel/bmc150-accel.c | 55 +++++++++++++++++++++++++---------------
1 file changed, 35 insertions(+), 20 deletions(-)
diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c
index 73e8773..4e70f51 100644
--- a/drivers/iio/accel/bmc150-accel.c
+++ b/drivers/iio/accel/bmc150-accel.c
@@ -196,7 +196,7 @@ struct bmc150_accel_data {
u32 slope_thres;
u32 range;
int ev_enable_state;
- int64_t timestamp, old_timestamp;
+ int64_t timestamp, old_timestamp; /* Only used in hw fifo mode. */
const struct bmc150_accel_chip_info *chip_info;
};
@@ -1183,7 +1183,6 @@ static const struct iio_info bmc150_accel_info = {
.write_event_value = bmc150_accel_write_event,
.write_event_config = bmc150_accel_write_event_config,
.read_event_config = bmc150_accel_read_event_config,
- .validate_trigger = bmc150_accel_validate_trigger,
.driver_module = THIS_MODULE,
};
@@ -1222,7 +1221,7 @@ static irqreturn_t bmc150_accel_trigger_handler(int irq, void *p)
mutex_unlock(&data->mutex);
iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
- data->timestamp);
+ pf->timestamp);
err_read:
iio_trigger_notify_done(indio_dev->trig);
@@ -1535,6 +1534,13 @@ static int bmc150_accel_fifo_set_mode(struct bmc150_accel_data *data)
return ret;
}
+static int bmc150_accel_buffer_preenable(struct iio_dev *indio_dev)
+{
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+ return bmc150_accel_set_power_state(data, true);
+}
+
static int bmc150_accel_buffer_postenable(struct iio_dev *indio_dev)
{
struct bmc150_accel_data *data = iio_priv(indio_dev);
@@ -1591,9 +1597,18 @@ out:
return 0;
}
+static int bmc150_accel_buffer_postdisable(struct iio_dev *indio_dev)
+{
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+ return bmc150_accel_set_power_state(data, false);
+}
+
static const struct iio_buffer_setup_ops bmc150_accel_buffer_ops = {
+ .preenable = bmc150_accel_buffer_preenable,
.postenable = bmc150_accel_buffer_postenable,
.predisable = bmc150_accel_buffer_predisable,
+ .postdisable = bmc150_accel_buffer_postdisable,
};
static int bmc150_accel_probe(struct i2c_client *client,
@@ -1636,6 +1651,15 @@ static int bmc150_accel_probe(struct i2c_client *client,
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &bmc150_accel_info;
+ ret = iio_triggered_buffer_setup(indio_dev,
+ &iio_pollfunc_store_time,
+ bmc150_accel_trigger_handler,
+ &bmc150_accel_buffer_ops);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed: iio triggered buffer setup\n");
+ return ret;
+ }
+
if (client->irq < 0)
client->irq = bmc150_accel_gpio_probe(client, data);
@@ -1648,7 +1672,7 @@ static int bmc150_accel_probe(struct i2c_client *client,
BMC150_ACCEL_IRQ_NAME,
indio_dev);
if (ret)
- return ret;
+ goto err_buffer_cleanup;
/*
* Set latched mode interrupt. While certain interrupts are
@@ -1661,24 +1685,14 @@ static int bmc150_accel_probe(struct i2c_client *client,
BMC150_ACCEL_INT_MODE_LATCH_RESET);
if (ret < 0) {
dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n");
- return ret;
+ goto err_buffer_cleanup;
}
bmc150_accel_interrupts_setup(indio_dev, data);
ret = bmc150_accel_triggers_setup(indio_dev, data);
if (ret)
- return ret;
-
- ret = iio_triggered_buffer_setup(indio_dev,
- &iio_pollfunc_store_time,
- bmc150_accel_trigger_handler,
- &bmc150_accel_buffer_ops);
- if (ret < 0) {
- dev_err(&client->dev,
- "Failed: iio triggered buffer setup\n");
- goto err_trigger_unregister;
- }
+ goto err_buffer_cleanup;
if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) ||
i2c_check_functionality(client->adapter,
@@ -1692,7 +1706,7 @@ static int bmc150_accel_probe(struct i2c_client *client,
ret = iio_device_register(indio_dev);
if (ret < 0) {
dev_err(&client->dev, "Unable to register iio device\n");
- goto err_buffer_cleanup;
+ goto err_trigger_unregister;
}
ret = pm_runtime_set_active(&client->dev);
@@ -1708,11 +1722,10 @@ static int bmc150_accel_probe(struct i2c_client *client,
err_iio_unregister:
iio_device_unregister(indio_dev);
-err_buffer_cleanup:
- if (indio_dev->pollfunc)
- iio_triggered_buffer_cleanup(indio_dev);
err_trigger_unregister:
bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
+err_buffer_cleanup:
+ iio_triggered_buffer_cleanup(indio_dev);
return ret;
}
@@ -1730,6 +1743,8 @@ static int bmc150_accel_remove(struct i2c_client *client)
bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
+ iio_triggered_buffer_cleanup(indio_dev);
+
mutex_lock(&data->mutex);
bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, 0);
mutex_unlock(&data->mutex);
--
1.9.1
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH] iio: accel: bmc150: decouple buffer and triggers
2015-05-12 14:03 [PATCH] iio: accel: bmc150: decouple buffer and triggers Vlad Dogaru
@ 2015-05-12 16:17 ` Octavian Purdila
2015-05-12 20:51 ` Pandruvada, Srinivas
0 siblings, 1 reply; 4+ messages in thread
From: Octavian Purdila @ 2015-05-12 16:17 UTC (permalink / raw)
To: Vlad Dogaru
Cc: Jonathan Cameron, linux-iio@vger.kernel.org, Srinivas Pandruvada,
Srinivas Pandruvada
On Tue, May 12, 2015 at 5:03 PM, Vlad Dogaru <vlad.dogaru@intel.com> wrote:
>
> If the interrupt pins are not available, we should still be able to use
> the buffer with an external trigger. However, we won't be able to use
> the hardware fifo since we have no means of signalling when the
> watermark is reached.
>
> I also added a comment to indicate that the timestamps in
> bmc150_accel_data are only used for hardware fifo, since initially I was
> confused about duplication with pf->timestamp.
>
> Signed-off-by: Vlad Dogaru <vlad.dogaru@intel.com>
Srinivas can you also please take a look?
The timestamp now has a slight delay (we take in the poll irq handler
instead of the irq handler) but I think that is negligible, so:
Reviewed-by: Octavian Purdila <octavian.purdila@intel.com>
> ---
> drivers/iio/accel/bmc150-accel.c | 55 +++++++++++++++++++++++++---------------
> 1 file changed, 35 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c
> index 73e8773..4e70f51 100644
> --- a/drivers/iio/accel/bmc150-accel.c
> +++ b/drivers/iio/accel/bmc150-accel.c
> @@ -196,7 +196,7 @@ struct bmc150_accel_data {
> u32 slope_thres;
> u32 range;
> int ev_enable_state;
> - int64_t timestamp, old_timestamp;
> + int64_t timestamp, old_timestamp; /* Only used in hw fifo mode. */
> const struct bmc150_accel_chip_info *chip_info;
> };
>
> @@ -1183,7 +1183,6 @@ static const struct iio_info bmc150_accel_info = {
> .write_event_value = bmc150_accel_write_event,
> .write_event_config = bmc150_accel_write_event_config,
> .read_event_config = bmc150_accel_read_event_config,
> - .validate_trigger = bmc150_accel_validate_trigger,
> .driver_module = THIS_MODULE,
> };
>
> @@ -1222,7 +1221,7 @@ static irqreturn_t bmc150_accel_trigger_handler(int irq, void *p)
> mutex_unlock(&data->mutex);
>
> iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
> - data->timestamp);
> + pf->timestamp);
> err_read:
> iio_trigger_notify_done(indio_dev->trig);
>
> @@ -1535,6 +1534,13 @@ static int bmc150_accel_fifo_set_mode(struct bmc150_accel_data *data)
> return ret;
> }
>
> +static int bmc150_accel_buffer_preenable(struct iio_dev *indio_dev)
> +{
> + struct bmc150_accel_data *data = iio_priv(indio_dev);
> +
> + return bmc150_accel_set_power_state(data, true);
> +}
> +
> static int bmc150_accel_buffer_postenable(struct iio_dev *indio_dev)
> {
> struct bmc150_accel_data *data = iio_priv(indio_dev);
> @@ -1591,9 +1597,18 @@ out:
> return 0;
> }
>
> +static int bmc150_accel_buffer_postdisable(struct iio_dev *indio_dev)
> +{
> + struct bmc150_accel_data *data = iio_priv(indio_dev);
> +
> + return bmc150_accel_set_power_state(data, false);
> +}
> +
> static const struct iio_buffer_setup_ops bmc150_accel_buffer_ops = {
> + .preenable = bmc150_accel_buffer_preenable,
> .postenable = bmc150_accel_buffer_postenable,
> .predisable = bmc150_accel_buffer_predisable,
> + .postdisable = bmc150_accel_buffer_postdisable,
> };
>
> static int bmc150_accel_probe(struct i2c_client *client,
> @@ -1636,6 +1651,15 @@ static int bmc150_accel_probe(struct i2c_client *client,
> indio_dev->modes = INDIO_DIRECT_MODE;
> indio_dev->info = &bmc150_accel_info;
>
> + ret = iio_triggered_buffer_setup(indio_dev,
> + &iio_pollfunc_store_time,
> + bmc150_accel_trigger_handler,
> + &bmc150_accel_buffer_ops);
> + if (ret < 0) {
> + dev_err(&client->dev, "Failed: iio triggered buffer setup\n");
> + return ret;
> + }
> +
> if (client->irq < 0)
> client->irq = bmc150_accel_gpio_probe(client, data);
>
> @@ -1648,7 +1672,7 @@ static int bmc150_accel_probe(struct i2c_client *client,
> BMC150_ACCEL_IRQ_NAME,
> indio_dev);
> if (ret)
> - return ret;
> + goto err_buffer_cleanup;
>
> /*
> * Set latched mode interrupt. While certain interrupts are
> @@ -1661,24 +1685,14 @@ static int bmc150_accel_probe(struct i2c_client *client,
> BMC150_ACCEL_INT_MODE_LATCH_RESET);
> if (ret < 0) {
> dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n");
> - return ret;
> + goto err_buffer_cleanup;
> }
>
> bmc150_accel_interrupts_setup(indio_dev, data);
>
> ret = bmc150_accel_triggers_setup(indio_dev, data);
> if (ret)
> - return ret;
> -
> - ret = iio_triggered_buffer_setup(indio_dev,
> - &iio_pollfunc_store_time,
> - bmc150_accel_trigger_handler,
> - &bmc150_accel_buffer_ops);
> - if (ret < 0) {
> - dev_err(&client->dev,
> - "Failed: iio triggered buffer setup\n");
> - goto err_trigger_unregister;
> - }
> + goto err_buffer_cleanup;
>
> if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) ||
> i2c_check_functionality(client->adapter,
> @@ -1692,7 +1706,7 @@ static int bmc150_accel_probe(struct i2c_client *client,
> ret = iio_device_register(indio_dev);
> if (ret < 0) {
> dev_err(&client->dev, "Unable to register iio device\n");
> - goto err_buffer_cleanup;
> + goto err_trigger_unregister;
> }
>
> ret = pm_runtime_set_active(&client->dev);
> @@ -1708,11 +1722,10 @@ static int bmc150_accel_probe(struct i2c_client *client,
>
> err_iio_unregister:
> iio_device_unregister(indio_dev);
> -err_buffer_cleanup:
> - if (indio_dev->pollfunc)
> - iio_triggered_buffer_cleanup(indio_dev);
> err_trigger_unregister:
> bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
> +err_buffer_cleanup:
> + iio_triggered_buffer_cleanup(indio_dev);
>
> return ret;
> }
> @@ -1730,6 +1743,8 @@ static int bmc150_accel_remove(struct i2c_client *client)
>
> bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
>
> + iio_triggered_buffer_cleanup(indio_dev);
> +
> mutex_lock(&data->mutex);
> bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, 0);
> mutex_unlock(&data->mutex);
> --
> 1.9.1
>
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] iio: accel: bmc150: decouple buffer and triggers
2015-05-12 16:17 ` Octavian Purdila
@ 2015-05-12 20:51 ` Pandruvada, Srinivas
2015-05-17 9:58 ` Jonathan Cameron
0 siblings, 1 reply; 4+ messages in thread
From: Pandruvada, Srinivas @ 2015-05-12 20:51 UTC (permalink / raw)
To: Purdila, Octavian
Cc: linux-iio@vger.kernel.org, jic23@kernel.org, Dogaru, Vlad
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] iio: accel: bmc150: decouple buffer and triggers
2015-05-12 20:51 ` Pandruvada, Srinivas
@ 2015-05-17 9:58 ` Jonathan Cameron
0 siblings, 0 replies; 4+ messages in thread
From: Jonathan Cameron @ 2015-05-17 9:58 UTC (permalink / raw)
To: Pandruvada, Srinivas, Purdila, Octavian
Cc: linux-iio@vger.kernel.org, Dogaru, Vlad
On 12/05/15 21:51, Pandruvada, Srinivas wrote:
> On Tue, 2015-05-12 at 19:17 +0300, Octavian Purdila wrote:
>> On Tue, May 12, 2015 at 5:03 PM, Vlad Dogaru <vlad.dogaru@intel.com> wrote:
>>>
>>> If the interrupt pins are not available, we should still be able to use
>>> the buffer with an external trigger. However, we won't be able to use
>>> the hardware fifo since we have no means of signalling when the
>>> watermark is reached.
>>>
>>> I also added a comment to indicate that the timestamps in
>>> bmc150_accel_data are only used for hardware fifo, since initially I was
>>> confused about duplication with pf->timestamp.
>>>
>>> Signed-off-by: Vlad Dogaru <vlad.dogaru@intel.com>
>>
>> Srinivas can you also please take a look?
>>
>> The timestamp now has a slight delay (we take in the poll irq handler
>> instead of the irq handler) but I think that is negligible, so:
> This should be fine.
Should be very small as it's a very short chain of function calls later.
Applied to the togreg branch of iio.git.
Thanks,
Jonathan
> Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
>>
>> Reviewed-by: Octavian Purdila <octavian.purdila@intel.com>
>>
>>> ---
>>> drivers/iio/accel/bmc150-accel.c | 55 +++++++++++++++++++++++++---------------
>>> 1 file changed, 35 insertions(+), 20 deletions(-)
>>>
>>> diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c
>>> index 73e8773..4e70f51 100644
>>> --- a/drivers/iio/accel/bmc150-accel.c
>>> +++ b/drivers/iio/accel/bmc150-accel.c
>>> @@ -196,7 +196,7 @@ struct bmc150_accel_data {
>>> u32 slope_thres;
>>> u32 range;
>>> int ev_enable_state;
>>> - int64_t timestamp, old_timestamp;
>>> + int64_t timestamp, old_timestamp; /* Only used in hw fifo mode. */
>>> const struct bmc150_accel_chip_info *chip_info;
>>> };
>>>
>>> @@ -1183,7 +1183,6 @@ static const struct iio_info bmc150_accel_info = {
>>> .write_event_value = bmc150_accel_write_event,
>>> .write_event_config = bmc150_accel_write_event_config,
>>> .read_event_config = bmc150_accel_read_event_config,
>>> - .validate_trigger = bmc150_accel_validate_trigger,
>>> .driver_module = THIS_MODULE,
>>> };
>>>
>>> @@ -1222,7 +1221,7 @@ static irqreturn_t bmc150_accel_trigger_handler(int irq, void *p)
>>> mutex_unlock(&data->mutex);
>>>
>>> iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
>>> - data->timestamp);
>>> + pf->timestamp);
>>> err_read:
>>> iio_trigger_notify_done(indio_dev->trig);
>>>
>>> @@ -1535,6 +1534,13 @@ static int bmc150_accel_fifo_set_mode(struct bmc150_accel_data *data)
>>> return ret;
>>> }
>>>
>>> +static int bmc150_accel_buffer_preenable(struct iio_dev *indio_dev)
>>> +{
>>> + struct bmc150_accel_data *data = iio_priv(indio_dev);
>>> +
>>> + return bmc150_accel_set_power_state(data, true);
>>> +}
>>> +
>>> static int bmc150_accel_buffer_postenable(struct iio_dev *indio_dev)
>>> {
>>> struct bmc150_accel_data *data = iio_priv(indio_dev);
>>> @@ -1591,9 +1597,18 @@ out:
>>> return 0;
>>> }
>>>
>>> +static int bmc150_accel_buffer_postdisable(struct iio_dev *indio_dev)
>>> +{
>>> + struct bmc150_accel_data *data = iio_priv(indio_dev);
>>> +
>>> + return bmc150_accel_set_power_state(data, false);
>>> +}
>>> +
>>> static const struct iio_buffer_setup_ops bmc150_accel_buffer_ops = {
>>> + .preenable = bmc150_accel_buffer_preenable,
>>> .postenable = bmc150_accel_buffer_postenable,
>>> .predisable = bmc150_accel_buffer_predisable,
>>> + .postdisable = bmc150_accel_buffer_postdisable,
>>> };
>>>
>>> static int bmc150_accel_probe(struct i2c_client *client,
>>> @@ -1636,6 +1651,15 @@ static int bmc150_accel_probe(struct i2c_client *client,
>>> indio_dev->modes = INDIO_DIRECT_MODE;
>>> indio_dev->info = &bmc150_accel_info;
>>>
>>> + ret = iio_triggered_buffer_setup(indio_dev,
>>> + &iio_pollfunc_store_time,
>>> + bmc150_accel_trigger_handler,
>>> + &bmc150_accel_buffer_ops);
>>> + if (ret < 0) {
>>> + dev_err(&client->dev, "Failed: iio triggered buffer setup\n");
>>> + return ret;
>>> + }
>>> +
>>> if (client->irq < 0)
>>> client->irq = bmc150_accel_gpio_probe(client, data);
>>>
>>> @@ -1648,7 +1672,7 @@ static int bmc150_accel_probe(struct i2c_client *client,
>>> BMC150_ACCEL_IRQ_NAME,
>>> indio_dev);
>>> if (ret)
>>> - return ret;
>>> + goto err_buffer_cleanup;
>>>
>>> /*
>>> * Set latched mode interrupt. While certain interrupts are
>>> @@ -1661,24 +1685,14 @@ static int bmc150_accel_probe(struct i2c_client *client,
>>> BMC150_ACCEL_INT_MODE_LATCH_RESET);
>>> if (ret < 0) {
>>> dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n");
>>> - return ret;
>>> + goto err_buffer_cleanup;
>>> }
>>>
>>> bmc150_accel_interrupts_setup(indio_dev, data);
>>>
>>> ret = bmc150_accel_triggers_setup(indio_dev, data);
>>> if (ret)
>>> - return ret;
>>> -
>>> - ret = iio_triggered_buffer_setup(indio_dev,
>>> - &iio_pollfunc_store_time,
>>> - bmc150_accel_trigger_handler,
>>> - &bmc150_accel_buffer_ops);
>>> - if (ret < 0) {
>>> - dev_err(&client->dev,
>>> - "Failed: iio triggered buffer setup\n");
>>> - goto err_trigger_unregister;
>>> - }
>>> + goto err_buffer_cleanup;
>>>
>>> if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) ||
>>> i2c_check_functionality(client->adapter,
>>> @@ -1692,7 +1706,7 @@ static int bmc150_accel_probe(struct i2c_client *client,
>>> ret = iio_device_register(indio_dev);
>>> if (ret < 0) {
>>> dev_err(&client->dev, "Unable to register iio device\n");
>>> - goto err_buffer_cleanup;
>>> + goto err_trigger_unregister;
>>> }
>>>
>>> ret = pm_runtime_set_active(&client->dev);
>>> @@ -1708,11 +1722,10 @@ static int bmc150_accel_probe(struct i2c_client *client,
>>>
>>> err_iio_unregister:
>>> iio_device_unregister(indio_dev);
>>> -err_buffer_cleanup:
>>> - if (indio_dev->pollfunc)
>>> - iio_triggered_buffer_cleanup(indio_dev);
>>> err_trigger_unregister:
>>> bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
>>> +err_buffer_cleanup:
>>> + iio_triggered_buffer_cleanup(indio_dev);
>>>
>>> return ret;
>>> }
>>> @@ -1730,6 +1743,8 @@ static int bmc150_accel_remove(struct i2c_client *client)
>>>
>>> bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
>>>
>>> + iio_triggered_buffer_cleanup(indio_dev);
>>> +
>>> mutex_lock(&data->mutex);
>>> bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, 0);
>>> mutex_unlock(&data->mutex);
>>> --
>>> 1.9.1
>>>
>
> N�����r��y���b�X��ǧv�^�){.n�+����{��*"��^n�r���z�\x1a��h����&��\x1e�G���h�\x03(�階�ݢj"��\x1a�^[m�����z�ޖ���f���h���~�mml==
>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2015-05-17 9:58 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2015-05-12 14:03 [PATCH] iio: accel: bmc150: decouple buffer and triggers Vlad Dogaru
2015-05-12 16:17 ` Octavian Purdila
2015-05-12 20:51 ` Pandruvada, Srinivas
2015-05-17 9:58 ` Jonathan Cameron
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