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Date: Thu, 30 Apr 2020 14:07:03 -0700
From: Gwendal Grignou <gwendal@...omium.org>
To: Jonathan Cameron <jic23@...nel.org>
Cc: Enric Balletbo i Serra <enric.balletbo@...labora.com>,
Benson Leung <bleung@...omium.org>,
Guenter Roeck <groeck@...omium.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
linux-iio <linux-iio@...r.kernel.org>
Subject: Re: [PATCH 2/2] iio: cros_ec_light: Add support for RGB sensor
On Sat, Apr 25, 2020 at 10:31 AM Jonathan Cameron <jic23@...nel.org> wrote:
>
> On Wed, 22 Apr 2020 17:02:30 -0700
> Gwendal Grignou <gwendal@...omium.org> wrote:
>
> > Add support for color sensors behind EC like TCS3400.
> > The color data can be presented in Red Green Blue color space (RGB) or
> > the CIE 1931 XYZ color space (XYZ).
> > In XYZ mode, the sensor is configured for auto calibrating its channels
> > and is the "normal" mode.
> > The driver tells the EC to switch between the 2 modes by using the
> > calibration command.
> > When the sensor is in calibration mode, only clear and RGB channels are
> > available. In normal mode, only clear and XYZ are.
> > When RGB channels are enabled, the sensor switches to calibration mode
> > when the buffer is enabled.
> >
> > When reading trhough sysfs command, set calibration mode and then read
> > the channel(s). A command will be issue for each read, so the channels
> > may come from different sensor sample.
> > When using the buffer, after setting the mask, when the buffer is
> > enabled, the calibration will be set based on the channel mask.
> >
> > libiio tools can be used to gather sensor information:
> > iio_readdev -s 10 cros-ec-light \
> > illuminance_clear illuminance_x illuminance_y illuminance_z
> Illuminance is not defined for color channels. It's units are LUX which
> is only defined wrt to a model of the human eye's response to
> 'brightness' (kind of).
Looking at "Calculating Color Temperature and Illuminance " from AMS
[https://ams.com/documents/20143/80162/TCS34xx_AN000517_1-00.pdf/1efe49f7-4f92-ba88-ca7c-5121691daff7]
page 5, equation 2, the illuminance (Y) is a derived from the vector
(X, Y, Z) with coefficient applied. Doesn't it mean
in_illumincance_[X,Y,Z,R,G,B,clear ...]_raw have all the same unit,
lux?
>
> For RGB colour channels they are normally unit free so use intensity
> instead. For XYZ.. hmm not sure.
>
> As Peter pointed out we need some doc updates to cover this use
> of x, y and z.
Will also add definition for in_illuminance_[red|green|blue]_raw.
>
> >
> > To match IIO ABI, the clear illuminance channel has been renamed
> > in_illuminance_clear_raw from in_illuminance_input.
> >
> > Signed-off-by: Gwendal Grignou <gwendal@...omium.org>
> A few additional comments inline.
>
> J
> > ---
> > drivers/iio/light/cros_ec_light_prox.c | 470 +++++++++++++++---
> > drivers/platform/chrome/cros_ec_sensorhub.c | 3 +
> > .../linux/iio/common/cros_ec_sensors_core.h | 1 -
> > .../linux/platform_data/cros_ec_commands.h | 2 +
> > 4 files changed, 405 insertions(+), 71 deletions(-)
> >
> > diff --git a/drivers/iio/light/cros_ec_light_prox.c b/drivers/iio/light/cros_ec_light_prox.c
> > index 2198b50909ed0..57eee557a785c 100644
> > --- a/drivers/iio/light/cros_ec_light_prox.c
> > +++ b/drivers/iio/light/cros_ec_light_prox.c
> > @@ -17,82 +17,190 @@
> > #include <linux/module.h>
> > #include <linux/platform_data/cros_ec_commands.h>
> > #include <linux/platform_data/cros_ec_proto.h>
> > +#include <linux/platform_data/cros_ec_sensorhub.h>
> > #include <linux/platform_device.h>
> > #include <linux/slab.h>
> >
> > /*
> > - * We only represent one entry for light or proximity. EC is merging different
> > - * light sensors to return the what the eye would see. For proximity, we
> > - * currently support only one light source.
> > + * We may present up to 7 channels:
> > + *
> > + * +-----+-----+-----+-----+-----+-----+-----+
> > + * |Clear| X | Y | Z | RED |BLUE |GREEN|
> > + * |Prox | | | | | | |
> > + * +-----+-----+-----+-----+-----+-----+-----+
> > + *
> > + * Prox[imity] is presented by proximity sensors.
> > + * The clear channel is supported by single and color light sensors.
> > + * Color light sensor either reports color information in the RGB space or
> > + * the CIE 1931 XYZ (XYZ) color space.
> > */
> > -#define CROS_EC_LIGHT_PROX_MAX_CHANNELS (1 + 1)
> > +#define CROS_EC_LIGHT_CLEAR_OR_PROXIMITY_MASK 1
> > +#define CROS_EC_LIGHT_XYZ_SPACE_MASK (0x7 << 1)
> > +#define CROS_EC_LIGHT_RGB_SPACE_MASK (0x7 << 4)
> > +
> > +/*
> > + * We always represent one entry for light or proximity, and all
> > + * samples can be timestamped.
> > + */
> > +#define CROS_EC_LIGHT_PROX_MIN_CHANNELS (1 + 1)
> > +
> > +static const unsigned long cros_ec_light_prox_bitmasks[] = {
> > + CROS_EC_LIGHT_CLEAR_OR_PROXIMITY_MASK,
> > + CROS_EC_LIGHT_XYZ_SPACE_MASK,
> > + CROS_EC_LIGHT_XYZ_SPACE_MASK | CROS_EC_LIGHT_CLEAR_OR_PROXIMITY_MASK,
> > + CROS_EC_LIGHT_RGB_SPACE_MASK,
> > + CROS_EC_LIGHT_RGB_SPACE_MASK | CROS_EC_LIGHT_CLEAR_OR_PROXIMITY_MASK,
> > + 0,
> > +};
> > +
> > +#define CROS_EC_IDX_TO_CHAN(_idx) (((_idx) - 1) % CROS_EC_SENSOR_MAX_AXIS)
> >
> > /* State data for ec_sensors iio driver. */
> > struct cros_ec_light_prox_state {
> > /* Shared by all sensors */
> > struct cros_ec_sensors_core_state core;
> > + struct iio_chan_spec *channel;
>
> Plural?
Removed, it was unused (iio_dev->channels is).
>
> >
> > - struct iio_chan_spec channels[CROS_EC_LIGHT_PROX_MAX_CHANNELS];
> > + /* Calibration information for the color channels. */
> > + struct calib_data rgb_calib[CROS_EC_SENSOR_MAX_AXIS];
> > };
> >
> > +static void cros_ec_light_channel_common(struct iio_chan_spec *channel)
> > +{
> > + channel->info_mask_shared_by_all =
> > + BIT(IIO_CHAN_INFO_SAMP_FREQ);
> > + channel->info_mask_shared_by_all_available =
> > + BIT(IIO_CHAN_INFO_SAMP_FREQ);
> > + channel->scan_type.realbits = CROS_EC_SENSOR_BITS;
> > + channel->scan_type.storagebits = CROS_EC_SENSOR_BITS;
> > + channel->scan_type.shift = 0;
>
> You zero the whole thing first, and this is the 'obvious' default
> so you can skip setting shift.
Done
>
> > + channel->scan_index = 0;
> > + channel->ext_info = cros_ec_sensors_ext_info;
> > + channel->scan_type.sign = 'u';
> > +}
> > +
> > +static int
> > +cros_ec_light_extra_send_host_cmd(struct cros_ec_sensors_core_state *state,
> > + int increment, u16 opt_length)
> > +{
> > + u8 save_sensor_num = state->param.info.sensor_num;
> > + int ret;
> > +
> > + state->param.info.sensor_num += increment;
> > + ret = cros_ec_motion_send_host_cmd(state, opt_length);
> > + state->param.info.sensor_num = save_sensor_num;
> > + return ret;
> > +}
> > +
> > +static int cros_ec_light_prox_read_data(struct iio_dev *indio_dev,
> > + struct iio_chan_spec const *chan,
> > + int *val)
> > +{
> > + struct cros_ec_light_prox_state *st = iio_priv(indio_dev);
> > + int ret;
> > + int idx = chan->scan_index;
> > + s16 data;
> > +
> > + /*
> > + * The data coming from the light sensor is
> > + * pre-processed and represents the ambient light
> > + * illuminance reading expressed in lux.
> > + */
> > + if (idx == 0) {
> > + ret = cros_ec_sensors_read_cmd(indio_dev, 1, &data);
> > + if (ret < 0)
> > + return ret;
> > + *val = data;
> > + } else {
> > + ret = cros_ec_light_extra_send_host_cmd(
> > + &st->core, 1, sizeof(st->core.resp->data));
> > + if (ret)
> > + return ret;
> > + *val = st->core.resp->data.data[CROS_EC_IDX_TO_CHAN(idx)];
> > + }
> > + return IIO_VAL_INT;
> > +}
> > +
> > +static int cros_ec_light_read_color_scale(struct cros_ec_light_prox_state *st,
> > + int idx, int *val, int *val2)
> > +{
> > + int ret, i;
> > + u16 scale;
> > +
> > + st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_SCALE;
> > + st->core.param.sensor_scale.flags = 0;
> > + if (idx == 0)
> > + ret = cros_ec_motion_send_host_cmd(&st->core, 0);
> > + else
> > + ret = cros_ec_light_extra_send_host_cmd(&st->core, 1, 0);
> > + if (ret)
> > + return ret;
> > +
> > + if (idx == 0) {
> > + scale = st->core.resp->sensor_scale.scale[0];
> > + st->core.calib[0].scale = scale;
> > + } else {
> > + for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
> > + st->rgb_calib[i].scale =
> > + st->core.resp->sensor_scale.scale[i];
> > + scale = st->rgb_calib[CROS_EC_IDX_TO_CHAN(idx)].scale;
> > + }
> > + /*
> > + * scale is a number x.y, where x is coded on 1 bit,
> > + * y coded on 15 bits, between 0 and 9999.
> > + */
> > + *val = scale >> 15;
> > + *val2 = ((scale & 0x7FFF) * 1000000LL) /
> > + MOTION_SENSE_DEFAULT_SCALE;
> > + return IIO_VAL_INT_PLUS_MICRO;
> > +}
> > +
> > static int cros_ec_light_prox_read(struct iio_dev *indio_dev,
> > struct iio_chan_spec const *chan,
> > int *val, int *val2, long mask)
> > {
> > struct cros_ec_light_prox_state *st = iio_priv(indio_dev);
> > - u16 data = 0;
> > - s64 val64;
> > - int ret;
> > + int i, ret = IIO_VAL_INT;
>
> I'd rather you left this set explicitly next to where the values
> come from. Makes it easier to know it is correct.
Done
>
> > int idx = chan->scan_index;
> > + s64 val64;
> >
> > mutex_lock(&st->core.cmd_lock);
> > -
> > switch (mask) {
> > case IIO_CHAN_INFO_RAW:
> > - if (chan->type == IIO_PROXIMITY) {
> > - ret = cros_ec_sensors_read_cmd(indio_dev, 1 << idx,
> > - (s16 *)&data);
> > - if (ret)
> > - break;
> > - *val = data;
> > - ret = IIO_VAL_INT;
> > - } else {
> > - ret = -EINVAL;
> > - }
> > - break;
> > - case IIO_CHAN_INFO_PROCESSED:
> > - if (chan->type == IIO_LIGHT) {
> > - ret = cros_ec_sensors_read_cmd(indio_dev, 1 << idx,
> > - (s16 *)&data);
> > - if (ret)
> > - break;
> > - /*
> > - * The data coming from the light sensor is
> > - * pre-processed and represents the ambient light
> > - * illuminance reading expressed in lux.
> > - */
> > - *val = data;
> > - ret = IIO_VAL_INT;
> > - } else {
> > - ret = -EINVAL;
> > - }
> > + ret = cros_ec_light_prox_read_data(indio_dev, chan, val);
> > break;
> > case IIO_CHAN_INFO_CALIBBIAS:
> > st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
> > st->core.param.sensor_offset.flags = 0;
> >
> > - ret = cros_ec_motion_send_host_cmd(&st->core, 0);
> > + if (idx == 0)
> > + ret = cros_ec_motion_send_host_cmd(&st->core, 0);
> > + else
> > + ret = cros_ec_light_extra_send_host_cmd(
> > + &st->core, 1, 0);
> > if (ret)
> > break;
> > -
> > - /* Save values */
> > - st->core.calib[0].offset =
> > - st->core.resp->sensor_offset.offset[0];
> > -
> > - *val = st->core.calib[idx].offset;
> > + if (idx == 0) {
> > + *val = st->core.calib[0].offset =
> > + st->core.resp->sensor_offset.offset[0];
> > + } else {
> > + for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS;
> > + i++)
> > + st->rgb_calib[i].offset =
> > + st->core.resp->sensor_offset.offset[i];
> > + *val = st->rgb_calib[CROS_EC_IDX_TO_CHAN(idx)].offset;
> > + }
> > ret = IIO_VAL_INT;
> > break;
> > case IIO_CHAN_INFO_CALIBSCALE:
> > + if (indio_dev->num_channels > CROS_EC_LIGHT_PROX_MIN_CHANNELS) {
> > + ret = cros_ec_light_read_color_scale(st, idx, val,
> > + val2);
> > + break;
> > + }
> > + /* RANGE is used for calibration in 1 channel sensors. */
> > + fallthrough;
> > + case IIO_CHAN_INFO_SCALE:
> > /*
> > * RANGE is used for calibration
> > * scale is a number x.y, where x is coded on 16 bits,
> > @@ -121,29 +229,84 @@ static int cros_ec_light_prox_read(struct iio_dev *indio_dev,
> > return ret;
> > }
> >
> > +static int cros_ec_light_write_color_scale(struct cros_ec_light_prox_state *st,
> > + int idx, int val, int val2)
> > +{
> > + int i;
> > + u16 scale;
> > +
> > + if (val >= 2) {
> > + /*
> > + * The user space is sending values already
> > + * multiplied by MOTION_SENSE_DEFAULT_SCALE.
> > + */
> > + scale = val;
> > + } else {
> > + u64 val64 = val2 * MOTION_SENSE_DEFAULT_SCALE;
> > +
> > + do_div(val64, 1000000);
> > + scale = (val << 15) | val64;
> > + }
> > +
> > + st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_SCALE;
> > + st->core.param.sensor_offset.flags = MOTION_SENSE_SET_OFFSET;
> > + st->core.param.sensor_offset.temp = EC_MOTION_SENSE_INVALID_CALIB_TEMP;
> > + if (idx == 0) {
> > + st->core.calib[0].scale = scale;
> > + st->core.param.sensor_scale.scale[0] = scale;
> > + return cros_ec_motion_send_host_cmd(&st->core, 0);
> > + }
> > +
> > + st->rgb_calib[CROS_EC_IDX_TO_CHAN(idx)].scale = scale;
> > + for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
> > + st->core.param.sensor_scale.scale[i] = st->rgb_calib[i].scale;
> > + return cros_ec_light_extra_send_host_cmd(&st->core, 1, 0);
> > +}
> > +
> > static int cros_ec_light_prox_write(struct iio_dev *indio_dev,
> > struct iio_chan_spec const *chan,
> > int val, int val2, long mask)
> > {
> > struct cros_ec_light_prox_state *st = iio_priv(indio_dev);
> > - int ret;
> > + int ret, i;
> > int idx = chan->scan_index;
> >
> > mutex_lock(&st->core.cmd_lock);
> >
> > switch (mask) {
> > case IIO_CHAN_INFO_CALIBBIAS:
> > - st->core.calib[idx].offset = val;
> > /* Send to EC for each axis, even if not complete */
> > st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
> > st->core.param.sensor_offset.flags = MOTION_SENSE_SET_OFFSET;
> > - st->core.param.sensor_offset.offset[0] =
> > - st->core.calib[0].offset;
> > st->core.param.sensor_offset.temp =
> > EC_MOTION_SENSE_INVALID_CALIB_TEMP;
> > - ret = cros_ec_motion_send_host_cmd(&st->core, 0);
> > + if (idx == 0) {
> > + st->core.calib[0].offset = val;
> > + st->core.param.sensor_offset.offset[0] = val;
> > + ret = cros_ec_motion_send_host_cmd(&st->core, 0);
> > + } else {
> > + st->rgb_calib[CROS_EC_IDX_TO_CHAN(idx)].offset = val;
> > + for (i = CROS_EC_SENSOR_X;
> > + i < CROS_EC_SENSOR_MAX_AXIS;
> > + i++)
> > + st->core.param.sensor_offset.offset[i] =
> > + st->rgb_calib[i].offset;
> > + ret = cros_ec_light_extra_send_host_cmd(
> > + &st->core, 1, 0);
> > + }
> > break;
> > case IIO_CHAN_INFO_CALIBSCALE:
> > + if (indio_dev->num_channels > CROS_EC_LIGHT_PROX_MIN_CHANNELS) {
> > + ret = cros_ec_light_write_color_scale(st, idx,
> > + val, val2);
> > + break;
> > + }
> > + /*
> > + * For sensors with only one channel, _RANGE is used
> > + * instead of _SCALE.
> > + */
> > + fallthrough;
> > + case IIO_CHAN_INFO_SCALE:
> > st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
> > st->core.param.sensor_range.data = (val << 16) | (val2 / 100);
> > ret = cros_ec_motion_send_host_cmd(&st->core, 0);
> > @@ -159,27 +322,154 @@ static int cros_ec_light_prox_write(struct iio_dev *indio_dev,
> > return ret;
> > }
> >
> > +static int cros_ec_light_push_data(struct iio_dev *indio_dev,
> > + s16 *data,
> > + s64 timestamp)
> > +{
> > + struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
> > + unsigned long scan_mask;
> > +
> > + if (!st || !indio_dev->active_scan_mask)
>
> How would you get here with st not being valid?
> I'm fairly sure we don't sanity check iio_priv so if indio_dev
> is valid you'll get a value that passes that check.
Removed.
>
> > + return 0;
> > +
> > + scan_mask = *indio_dev->active_scan_mask;
> > + if ((scan_mask & ~CROS_EC_LIGHT_CLEAR_OR_PROXIMITY_MASK) == 0)
> > + /*
> > + * Only one channel at most is used.
> > + * Use regular push function.
> > + */
> > + return cros_ec_sensors_push_data(indio_dev, data, timestamp);
> > +
> > + if (scan_mask & CROS_EC_LIGHT_CLEAR_OR_PROXIMITY_MASK)
> > + /*
> > + * Save clear channel, will be used when RGB data arrives.
> > + */
> > + st->samples[0] = data[0];
> > +
> > + return 0;
> > +}
> > +
> > +static int cros_ec_light_push_data_rgb(struct iio_dev *indio_dev,
> > + s16 *data,
> > + s64 timestamp)
> > +{
> > + struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
> > + s16 *out;
> > + unsigned long scan_mask;
> > + unsigned int i;
> > +
> > + if (!st || !indio_dev->active_scan_mask)
> > + return 0;
> > +
> > + scan_mask = *indio_dev->active_scan_mask;
> > + /*
> > + * Send all data needed.
> > + */
> > + out = (s16 *)st->samples;
> > + for_each_set_bit(i,
> > + indio_dev->active_scan_mask,
> > + indio_dev->masklength) {
> > + if (i > 0)
> > + *out = data[CROS_EC_IDX_TO_CHAN(i)];
> > + out++;
> > + }
> > + iio_push_to_buffers_with_timestamp(indio_dev, st->samples, timestamp);
> > + return 0;
> > +}
> > +
> > +static irqreturn_t cros_ec_light_capture(int irq, void *p)
> > +{
> > + struct iio_poll_func *pf = p;
> > + struct iio_dev *indio_dev = pf->indio_dev;
> > + struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
> > + int ret, i, idx = 0;
> > + s16 data;
> > + const unsigned long scan_mask = *indio_dev->active_scan_mask;
> > +
> > + mutex_lock(&st->cmd_lock);
> > +
> > + /* Clear capture data. */
> > + memset(st->samples, 0, indio_dev->scan_bytes);
> > +
> > + /* Read first channel. */
> > + ret = cros_ec_sensors_read_cmd(indio_dev, 1, &data);
> > + if (ret < 0) {
> > + mutex_unlock(&st->cmd_lock);
> > + goto done;
> > + }
> > + if (scan_mask & CROS_EC_LIGHT_CLEAR_OR_PROXIMITY_MASK)
> > + ((s16 *)st->samples)[idx++] = data;
> > +
> > + /* Read remaining channels. */
> > + if ((scan_mask & CROS_EC_LIGHT_XYZ_SPACE_MASK) ||
> > + (scan_mask & CROS_EC_LIGHT_RGB_SPACE_MASK)) {
> > + ret = cros_ec_light_extra_send_host_cmd(
> > + st, 1, sizeof(st->resp->data));
> > + if (ret < 0) {
> > + mutex_unlock(&st->cmd_lock);
> > + goto done;
> > + }
> > + for (i = 0; i < CROS_EC_SENSOR_MAX_AXIS; i++)
> > + ((s16 *)st->samples)[idx++] = st->resp->data.data[i];
> > + }
> > + mutex_unlock(&st->cmd_lock);
> > +
> > + iio_push_to_buffers_with_timestamp(indio_dev, st->samples,
> > + iio_get_time_ns(indio_dev));
> > +
> > +done:
> > + iio_trigger_notify_done(indio_dev->trig);
> > +
> > + return IRQ_HANDLED;
> > +}
> > +
> > +static int cros_ec_light_prox_update_scan_mode(struct iio_dev *indio_dev,
> > + const unsigned long *scan_mask)
> > +{
> > + struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
> > + int ret;
> > + bool enable_raw_mode;
> > +
> > + if (*scan_mask & CROS_EC_LIGHT_XYZ_SPACE_MASK)
> > + enable_raw_mode = false;
> > + else if (*scan_mask & CROS_EC_LIGHT_RGB_SPACE_MASK)
> > + enable_raw_mode = true;
> > + else
> > + /* Just clear channel or proxmity, nothing to do. */
> > + return 0;
> > +
> > + mutex_lock(&st->cmd_lock);
> > + st->param.cmd = MOTIONSENSE_CMD_PERFORM_CALIB;
> > + st->param.perform_calib.enable = enable_raw_mode;
> > + ret = cros_ec_motion_send_host_cmd(st, 0);
> > + mutex_unlock(&st->cmd_lock);
> > +
> > + return ret;
> > +}
> > +
> > static const struct iio_info cros_ec_light_prox_info = {
> > .read_raw = &cros_ec_light_prox_read,
> > .write_raw = &cros_ec_light_prox_write,
> > .read_avail = &cros_ec_sensors_core_read_avail,
> > + .update_scan_mode = &cros_ec_light_prox_update_scan_mode,
> > };
> >
> > static int cros_ec_light_prox_probe(struct platform_device *pdev)
> > {
> > struct device *dev = &pdev->dev;
> > + struct cros_ec_sensorhub *sensor_hub = dev_get_drvdata(dev->parent);
> > struct iio_dev *indio_dev;
> > struct cros_ec_light_prox_state *state;
> > struct iio_chan_spec *channel;
> > - int ret;
> > + int ret, i, num_channels = CROS_EC_LIGHT_PROX_MIN_CHANNELS;
> >
> > indio_dev = devm_iio_device_alloc(dev, sizeof(*state));
> > if (!indio_dev)
> > return -ENOMEM;
> >
> > ret = cros_ec_sensors_core_init(pdev, indio_dev, true,
> > - cros_ec_sensors_capture,
> > - cros_ec_sensors_push_data);
> > + cros_ec_light_capture,
> > + cros_ec_light_push_data);
> > if (ret)
> > return ret;
> >
> > @@ -189,28 +479,40 @@ static int cros_ec_light_prox_probe(struct platform_device *pdev)
> > state = iio_priv(indio_dev);
> > state->core.type = state->core.resp->info.type;
> > state->core.loc = state->core.resp->info.location;
> > - channel = state->channels;
> >
> > - /* Common part */
> > - channel->info_mask_shared_by_all =
> > - BIT(IIO_CHAN_INFO_SAMP_FREQ);
> > - channel->info_mask_shared_by_all_available =
> > - BIT(IIO_CHAN_INFO_SAMP_FREQ);
> > - channel->scan_type.realbits = CROS_EC_SENSOR_BITS;
> > - channel->scan_type.storagebits = CROS_EC_SENSOR_BITS;
> > - channel->scan_type.shift = 0;
> > - channel->scan_index = 0;
> > - channel->ext_info = cros_ec_sensors_ext_info;
> > - channel->scan_type.sign = 'u';
> > + /* Check if we need more sensors for RGB (or XYZ). */
> > + state->core.param.cmd = MOTIONSENSE_CMD_INFO;
> > + if (cros_ec_light_extra_send_host_cmd(&state->core, 1, 0) == 0 &&
> > + state->core.resp->info.type == MOTIONSENSE_TYPE_LIGHT_RGB)
> > + num_channels += 2 * CROS_EC_SENSOR_MAX_AXIS;
> > +
> > + channel = devm_kcalloc(dev, num_channels, sizeof(*channel), 0);
> > + if (!channel)
> > + return -ENOMEM;
> > +
> > + indio_dev->channels = channel;
> > + indio_dev->num_channels = num_channels;
> > + indio_dev->available_scan_masks = cros_ec_light_prox_bitmasks;
> >
> > + cros_ec_light_channel_common(channel);
> > /* Sensor specific */
> > switch (state->core.type) {
> > case MOTIONSENSE_TYPE_LIGHT:
> > channel->type = IIO_LIGHT;
> > + if (num_channels > CROS_EC_LIGHT_PROX_MIN_CHANNELS) {
> > + /*
> > + * To set a global scale, as CALIB_SCALE for RGB sensor
> > + * is limited between 0 and 2.
> > + */
> > + channel->info_mask_shared_by_all |=
> > + BIT(IIO_CHAN_INFO_SCALE);
> > + }
> > channel->info_mask_separate =
> > - BIT(IIO_CHAN_INFO_PROCESSED) |
> > + BIT(IIO_CHAN_INFO_RAW) |
>
> Didn't we just change the ABI by doing this?
Yes, processed did not make sense, given illuminance is the raw value
in lux, as specified in the iio abi documentation.
>
> > BIT(IIO_CHAN_INFO_CALIBBIAS) |
> > BIT(IIO_CHAN_INFO_CALIBSCALE);
> > + channel->modified = 1;
> > + channel->channel2 = IIO_MOD_LIGHT_CLEAR;
> > break;
> > case MOTIONSENSE_TYPE_PROX:
> > channel->type = IIO_PROXIMITY;
> > @@ -223,20 +525,48 @@ static int cros_ec_light_prox_probe(struct platform_device *pdev)
> > dev_warn(dev, "Unknown motion sensor\n");
> > return -EINVAL;
> > }
> > + channel++;
> > +
> > + if (num_channels > CROS_EC_LIGHT_PROX_MIN_CHANNELS) {
> > + u8 sensor_num = state->core.param.info.sensor_num;
> > + int idx;
> > +
> > + for (i = CROS_EC_SENSOR_X, idx = 1; i < CROS_EC_SENSOR_MAX_AXIS;
> > + i++, channel++, idx++) {
> > + cros_ec_light_channel_common(channel);
> > + channel->info_mask_separate = BIT(IIO_CHAN_INFO_RAW);
> > + channel->scan_index = idx;
> > + channel->modified = 1;
> > + channel->channel2 = IIO_MOD_X + i;
> > + channel->type = IIO_LIGHT;
> > + }
> > + for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS;
> > + i++, channel++, idx++) {
> > + cros_ec_light_channel_common(channel);
> > + channel->info_mask_separate =
> > + BIT(IIO_CHAN_INFO_RAW) |
> > + BIT(IIO_CHAN_INFO_CALIBBIAS) |
> > + BIT(IIO_CHAN_INFO_CALIBSCALE);
> > + channel->scan_index = idx;
> > + channel->modified = 1;
> > + channel->channel2 = IIO_MOD_LIGHT_RED + i;
> > + channel->type = IIO_LIGHT;
> > + }
> > + cros_ec_sensorhub_register_push_data(
> > + sensor_hub,
> > + sensor_num + 1,
> > + indio_dev,
> > + cros_ec_light_push_data_rgb);
> > + }
> >
> > /* Timestamp */
> > - channel++;
> > channel->type = IIO_TIMESTAMP;
> > channel->channel = -1;
> > - channel->scan_index = 1;
> > + channel->scan_index = num_channels - 1;
> > channel->scan_type.sign = 's';
> > channel->scan_type.realbits = 64;
> > channel->scan_type.storagebits = 64;
> >
> > - indio_dev->channels = state->channels;
> > -
> > - indio_dev->num_channels = CROS_EC_LIGHT_PROX_MAX_CHANNELS;
> > -
> > state->core.read_ec_sensors_data = cros_ec_sensors_read_cmd;
> >
> > return devm_iio_device_register(dev, indio_dev);
> > diff --git a/drivers/platform/chrome/cros_ec_sensorhub.c b/drivers/platform/chrome/cros_ec_sensorhub.c
> > index b7f2c00db5e1e..f85191ab2ee34 100644
> > --- a/drivers/platform/chrome/cros_ec_sensorhub.c
> > +++ b/drivers/platform/chrome/cros_ec_sensorhub.c
> > @@ -103,6 +103,9 @@ static int cros_ec_sensorhub_register(struct device *dev,
> > case MOTIONSENSE_TYPE_LIGHT:
> > name = "cros-ec-light";
> > break;
> > + case MOTIONSENSE_TYPE_LIGHT_RGB:
> > + /* Processed with cros-ec-light. */
> > + continue;
> > case MOTIONSENSE_TYPE_ACTIVITY:
> > name = "cros-ec-activity";
> > break;
> > diff --git a/include/linux/iio/common/cros_ec_sensors_core.h b/include/linux/iio/common/cros_ec_sensors_core.h
> > index 7bc961defa87e..c31766c64bf94 100644
> > --- a/include/linux/iio/common/cros_ec_sensors_core.h
> > +++ b/include/linux/iio/common/cros_ec_sensors_core.h
> > @@ -26,7 +26,6 @@ enum {
> >
> > /*
> > * 4 16 bit channels are allowed.
> > - * Good enough for current sensors, they use up to 3 16 bit vectors.
> > */
> > #define CROS_EC_SAMPLE_SIZE (sizeof(s64) * 2)
> >
> > diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
> > index 3286ac00b0436..72ee6b049da62 100644
> > --- a/include/linux/platform_data/cros_ec_commands.h
> > +++ b/include/linux/platform_data/cros_ec_commands.h
> > @@ -2342,6 +2342,7 @@ enum motionsensor_type {
> > MOTIONSENSE_TYPE_ACTIVITY = 5,
> > MOTIONSENSE_TYPE_BARO = 6,
> > MOTIONSENSE_TYPE_SYNC = 7,
> > + MOTIONSENSE_TYPE_LIGHT_RGB = 8,
> > MOTIONSENSE_TYPE_MAX,
> > };
> >
> > @@ -2375,6 +2376,7 @@ enum motionsensor_chip {
> > MOTIONSENSE_CHIP_LSM6DS3 = 17,
> > MOTIONSENSE_CHIP_LSM6DSO = 18,
> > MOTIONSENSE_CHIP_LNG2DM = 19,
> > + MOTIONSENSE_CHIP_TCS3400 = 20,
> > MOTIONSENSE_CHIP_MAX,
> > };
> >
>
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