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Date: Sun, 7 Mar 2021 20:45:46 +0200
From: Alexandru Ardelean <ardeleanalex@...il.com>
To: Jonathan Cameron <jic23@...nel.org>
Cc: Enric Balletbo i Serra <enric.balletbo@...labora.com>,
Alexandru Ardelean <alexandru.ardelean@...log.com>,
LKML <linux-kernel@...r.kernel.org>,
linux-iio <linux-iio@...r.kernel.org>,
Benson Leung <bleung@...omium.org>, groeck@...omium.org,
Gwendal Grignou <gwendal@...omium.org>
Subject: Re: [PATCH 1/2] iio: cros_ec: do an early exit if not physical_device case
On Sun, Mar 7, 2021 at 1:59 PM Jonathan Cameron <jic23@...nel.org> wrote:
>
> On Tue, 2 Mar 2021 11:46:06 +0100
> Enric Balletbo i Serra <enric.balletbo@...labora.com> wrote:
>
> > Hi all,
> >
> > On 21/2/21 17:29, Jonathan Cameron wrote:
> > > On Mon, 23 Nov 2020 16:40:16 +0200
> > > Alexandru Ardelean <alexandru.ardelean@...log.com> wrote:
> > >
> > >> This whole code-block was put under one big if() condition/block.
> > >> This change does an early return if the 'physical_device' boolean is false,
> > >> thus unindenting the block by one level.
> > >>
> > >> No other functional change has been done.
> > >>
> > >> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
> > > @Gwendal, others This series from Alex has been outstanding for a while
> > > but may well still apply.
> > > Ideally looking for an ack.
> > >
> >
> > This looks good to me.
> >
> > Acked-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
>
> Hi Enric, Ack or both patches or just this one?
>
> @Alex, series needs a rebase. I'm not totally sure what's changed.
> If you don't get to it I'll do it at somepoint but unlikely to
> be terribly soon!
It's likely that it's that iio_device_attach_buffer() went away and
the block got replaced by devm_iio_kfifo_buffer_setup().
I'll re-spin it.
I dropped this set from my main work branch because I didn't know if
it was forgotten, and rebasing it with every change on
devm_iio_kfifo_buffer_setup() and
devm_iio_triggered_buffer_setup_ext() became annoying.
But it shouldn't be hard to re-spin.
>
> Jonathan
>
> >
> > Thanks,
> > Enric
> >
> > > Thanks,
> > >
> > > Jonathan
> > >
> > >> ---
> > >> .../cros_ec_sensors/cros_ec_sensors_core.c | 161 +++++++++---------
> > >> 1 file changed, 81 insertions(+), 80 deletions(-)
> > >>
> > >> diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> > >> index 5c6c4e6fec9b..9470014936f2 100644
> > >> --- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> > >> +++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> > >> @@ -287,89 +287,90 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
> > >>
> > >> indio_dev->name = pdev->name;
> > >>
> > >> - if (physical_device) {
> > >> - state->param.cmd = MOTIONSENSE_CMD_INFO;
> > >> - state->param.info.sensor_num = sensor_platform->sensor_num;
> > >> - ret = cros_ec_motion_send_host_cmd(state, 0);
> > >> - if (ret) {
> > >> - dev_warn(dev, "Can not access sensor info\n");
> > >> + if (!physical_device)
> > >> + return 0;
> > >> +
> > >> + state->param.cmd = MOTIONSENSE_CMD_INFO;
> > >> + state->param.info.sensor_num = sensor_platform->sensor_num;
> > >> + ret = cros_ec_motion_send_host_cmd(state, 0);
> > >> + if (ret) {
> > >> + dev_warn(dev, "Can not access sensor info\n");
> > >> + return ret;
> > >> + }
> > >> + state->type = state->resp->info.type;
> > >> + state->loc = state->resp->info.location;
> > >> +
> > >> + /* Set sign vector, only used for backward compatibility. */
> > >> + memset(state->sign, 1, CROS_EC_SENSOR_MAX_AXIS);
> > >> +
> > >> + for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
> > >> + state->calib[i].scale = MOTION_SENSE_DEFAULT_SCALE;
> > >> +
> > >> + /* 0 is a correct value used to stop the device */
> > >> + if (state->msg->version < 3) {
> > >> + get_default_min_max_freq(state->resp->info.type,
> > >> + &frequencies[1],
> > >> + &frequencies[2],
> > >> + &state->fifo_max_event_count);
> > >> + } else {
> > >> + frequencies[1] = state->resp->info_3.min_frequency;
> > >> + frequencies[2] = state->resp->info_3.max_frequency;
> > >> + state->fifo_max_event_count =
> > >> + state->resp->info_3.fifo_max_event_count;
> > >> + }
> > >> + for (i = 0; i < ARRAY_SIZE(frequencies); i++) {
> > >> + state->frequencies[2 * i] = frequencies[i] / 1000;
> > >> + state->frequencies[2 * i + 1] =
> > >> + (frequencies[i] % 1000) * 1000;
> > >> + }
> > >> +
> > >> + if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE_FIFO)) {
> > >> + /*
> > >> + * Create a software buffer, feed by the EC FIFO.
> > >> + * We can not use trigger here, as events are generated
> > >> + * as soon as sample_frequency is set.
> > >> + */
> > >> + struct iio_buffer *buffer;
> > >> +
> > >> + buffer = devm_iio_kfifo_allocate(dev);
> > >> + if (!buffer)
> > >> + return -ENOMEM;
> > >> +
> > >> + iio_device_attach_buffer(indio_dev, buffer);
> > >> + indio_dev->modes = INDIO_BUFFER_SOFTWARE;
> > >> +
> > >> + ret = cros_ec_sensorhub_register_push_data(
> > >> + sensor_hub, sensor_platform->sensor_num,
> > >> + indio_dev, push_data);
> > >> + if (ret)
> > >> return ret;
> > >> - }
> > >> - state->type = state->resp->info.type;
> > >> - state->loc = state->resp->info.location;
> > >>
> > >> - /* Set sign vector, only used for backward compatibility. */
> > >> - memset(state->sign, 1, CROS_EC_SENSOR_MAX_AXIS);
> > >> + ret = devm_add_action_or_reset(
> > >> + dev, cros_ec_sensors_core_clean, pdev);
> > >> + if (ret)
> > >> + return ret;
> > >>
> > >> - for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
> > >> - state->calib[i].scale = MOTION_SENSE_DEFAULT_SCALE;
> > >> -
> > >> - /* 0 is a correct value used to stop the device */
> > >> - if (state->msg->version < 3) {
> > >> - get_default_min_max_freq(state->resp->info.type,
> > >> - &frequencies[1],
> > >> - &frequencies[2],
> > >> - &state->fifo_max_event_count);
> > >> - } else {
> > >> - frequencies[1] = state->resp->info_3.min_frequency;
> > >> - frequencies[2] = state->resp->info_3.max_frequency;
> > >> - state->fifo_max_event_count =
> > >> - state->resp->info_3.fifo_max_event_count;
> > >> - }
> > >> - for (i = 0; i < ARRAY_SIZE(frequencies); i++) {
> > >> - state->frequencies[2 * i] = frequencies[i] / 1000;
> > >> - state->frequencies[2 * i + 1] =
> > >> - (frequencies[i] % 1000) * 1000;
> > >> - }
> > >> -
> > >> - if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE_FIFO)) {
> > >> - /*
> > >> - * Create a software buffer, feed by the EC FIFO.
> > >> - * We can not use trigger here, as events are generated
> > >> - * as soon as sample_frequency is set.
> > >> - */
> > >> - struct iio_buffer *buffer;
> > >> -
> > >> - buffer = devm_iio_kfifo_allocate(dev);
> > >> - if (!buffer)
> > >> - return -ENOMEM;
> > >> -
> > >> - iio_device_attach_buffer(indio_dev, buffer);
> > >> - indio_dev->modes = INDIO_BUFFER_SOFTWARE;
> > >> -
> > >> - ret = cros_ec_sensorhub_register_push_data(
> > >> - sensor_hub, sensor_platform->sensor_num,
> > >> - indio_dev, push_data);
> > >> - if (ret)
> > >> - return ret;
> > >> -
> > >> - ret = devm_add_action_or_reset(
> > >> - dev, cros_ec_sensors_core_clean, pdev);
> > >> - if (ret)
> > >> - return ret;
> > >> -
> > >> - /* Timestamp coming from FIFO are in ns since boot. */
> > >> - ret = iio_device_set_clock(indio_dev, CLOCK_BOOTTIME);
> > >> - if (ret)
> > >> - return ret;
> > >> - } else {
> > >> - const struct attribute **fifo_attrs;
> > >> -
> > >> - if (has_hw_fifo)
> > >> - fifo_attrs = cros_ec_sensor_fifo_attributes;
> > >> - else
> > >> - fifo_attrs = NULL;
> > >> -
> > >> - /*
> > >> - * The only way to get samples in buffer is to set a
> > >> - * software trigger (systrig, hrtimer).
> > >> - */
> > >> - ret = devm_iio_triggered_buffer_setup_ext(
> > >> - dev, indio_dev, NULL, trigger_capture,
> > >> - NULL, fifo_attrs);
> > >> - if (ret)
> > >> - return ret;
> > >> - }
> > >> + /* Timestamp coming from FIFO are in ns since boot. */
> > >> + ret = iio_device_set_clock(indio_dev, CLOCK_BOOTTIME);
> > >> + if (ret)
> > >> + return ret;
> > >> + } else {
> > >> + const struct attribute **fifo_attrs;
> > >> +
> > >> + if (has_hw_fifo)
> > >> + fifo_attrs = cros_ec_sensor_fifo_attributes;
> > >> + else
> > >> + fifo_attrs = NULL;
> > >> +
> > >> + /*
> > >> + * The only way to get samples in buffer is to set a
> > >> + * software trigger (systrig, hrtimer).
> > >> + */
> > >> + ret = devm_iio_triggered_buffer_setup_ext(
> > >> + dev, indio_dev, NULL, trigger_capture,
> > >> + NULL, fifo_attrs);
> > >> + if (ret)
> > >> + return ret;
> > >> }
> > >>
> > >> return 0;
> > >
>
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