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-rw-r--r--drivers/iio/position/Kconfig35
-rw-r--r--drivers/iio/position/Makefile8
-rw-r--r--drivers/iio/position/hid-sensor-custom-intel-hinge.c381
-rw-r--r--drivers/iio/position/iqs624-pos.c285
4 files changed, 709 insertions, 0 deletions
diff --git a/drivers/iio/position/Kconfig b/drivers/iio/position/Kconfig
new file mode 100644
index 0000000000..1576a6380b
--- /dev/null
+++ b/drivers/iio/position/Kconfig
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Linear and angular position sensors
+#
+# When adding new entries keep the list in alphabetical order
+
+menu "Linear and angular position sensors"
+
+config IQS624_POS
+ tristate "Azoteq IQS624/625 angular position sensors"
+ depends on MFD_IQS62X || COMPILE_TEST
+ help
+ Say Y here if you want to build support for the Azoteq IQS624
+ and IQS625 angular position sensors.
+
+ To compile this driver as a module, choose M here: the module
+ will be called iqs624-pos.
+
+config HID_SENSOR_CUSTOM_INTEL_HINGE
+ depends on HID_SENSOR_HUB
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select HID_SENSOR_IIO_COMMON
+ select HID_SENSOR_IIO_TRIGGER
+ tristate "HID Hinge"
+ help
+ This sensor present three angles, hinge angel, screen angles
+ and keyboard angle respect to horizon (ground).
+ Say yes here to build support for the HID custom
+ intel hinge sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called hid-sensor-custom-hinge.
+
+endmenu
diff --git a/drivers/iio/position/Makefile b/drivers/iio/position/Makefile
new file mode 100644
index 0000000000..d70902f297
--- /dev/null
+++ b/drivers/iio/position/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for IIO linear and angular position sensors
+#
+
+# When adding new entries keep the list in alphabetical order
+
+obj-$(CONFIG_HID_SENSOR_CUSTOM_INTEL_HINGE) += hid-sensor-custom-intel-hinge.o
+obj-$(CONFIG_IQS624_POS) += iqs624-pos.o
diff --git a/drivers/iio/position/hid-sensor-custom-intel-hinge.c b/drivers/iio/position/hid-sensor-custom-intel-hinge.c
new file mode 100644
index 0000000000..07c30d2172
--- /dev/null
+++ b/drivers/iio/position/hid-sensor-custom-intel-hinge.c
@@ -0,0 +1,381 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * HID Sensors Driver
+ * Copyright (c) 2020, Intel Corporation.
+ */
+#include <linux/hid-sensor-hub.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/iio.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+
+#include "../common/hid-sensors/hid-sensor-trigger.h"
+
+enum hinge_channel {
+ CHANNEL_SCAN_INDEX_HINGE_ANGLE,
+ CHANNEL_SCAN_INDEX_SCREEN_ANGLE,
+ CHANNEL_SCAN_INDEX_KEYBOARD_ANGLE,
+ CHANNEL_SCAN_INDEX_MAX,
+};
+
+#define CHANNEL_SCAN_INDEX_TIMESTAMP CHANNEL_SCAN_INDEX_MAX
+
+static const u32 hinge_addresses[CHANNEL_SCAN_INDEX_MAX] = {
+ HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(1),
+ HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(2),
+ HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(3)
+};
+
+static const char *const hinge_labels[CHANNEL_SCAN_INDEX_MAX] = { "hinge",
+ "screen",
+ "keyboard" };
+
+struct hinge_state {
+ struct iio_dev *indio_dev;
+ struct hid_sensor_hub_attribute_info hinge[CHANNEL_SCAN_INDEX_MAX];
+ struct hid_sensor_hub_callbacks callbacks;
+ struct hid_sensor_common common_attributes;
+ const char *labels[CHANNEL_SCAN_INDEX_MAX];
+ struct {
+ u32 hinge_val[3];
+ u64 timestamp __aligned(8);
+ } scan;
+
+ int scale_pre_decml;
+ int scale_post_decml;
+ int scale_precision;
+ int value_offset;
+ u64 timestamp;
+};
+
+static const u32 hinge_sensitivity_addresses[] = {
+ HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(1),
+};
+
+/* Channel definitions */
+static const struct iio_chan_spec hinge_channels[] = {
+ {
+ .type = IIO_ANGL,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type =
+ BIT(IIO_CHAN_INFO_OFFSET) | BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) | BIT(IIO_CHAN_INFO_HYSTERESIS),
+ .scan_index = CHANNEL_SCAN_INDEX_HINGE_ANGLE,
+ .scan_type = {
+ .sign = 's',
+ .storagebits = 32,
+ },
+ }, {
+ .type = IIO_ANGL,
+ .indexed = 1,
+ .channel = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type =
+ BIT(IIO_CHAN_INFO_OFFSET) | BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) | BIT(IIO_CHAN_INFO_HYSTERESIS),
+ .scan_index = CHANNEL_SCAN_INDEX_SCREEN_ANGLE,
+ .scan_type = {
+ .sign = 's',
+ .storagebits = 32,
+ },
+ }, {
+ .type = IIO_ANGL,
+ .indexed = 1,
+ .channel = 2,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type =
+ BIT(IIO_CHAN_INFO_OFFSET) | BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) | BIT(IIO_CHAN_INFO_HYSTERESIS),
+ .scan_index = CHANNEL_SCAN_INDEX_KEYBOARD_ANGLE,
+ .scan_type = {
+ .sign = 's',
+ .storagebits = 32,
+ },
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP)
+};
+
+/* Adjust channel real bits based on report descriptor */
+static void hinge_adjust_channel_realbits(struct iio_chan_spec *channels,
+ int channel, int size)
+{
+ channels[channel].scan_type.realbits = size * 8;
+}
+
+/* Channel read_raw handler */
+static int hinge_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val, int *val2,
+ long mask)
+{
+ struct hinge_state *st = iio_priv(indio_dev);
+ struct hid_sensor_hub_device *hsdev;
+ int report_id;
+ s32 min;
+
+ hsdev = st->common_attributes.hsdev;
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ hid_sensor_power_state(&st->common_attributes, true);
+ report_id = st->hinge[chan->scan_index].report_id;
+ min = st->hinge[chan->scan_index].logical_minimum;
+ if (report_id < 0) {
+ hid_sensor_power_state(&st->common_attributes, false);
+ return -EINVAL;
+ }
+
+ *val = sensor_hub_input_attr_get_raw_value(st->common_attributes.hsdev,
+ hsdev->usage,
+ hinge_addresses[chan->scan_index],
+ report_id,
+ SENSOR_HUB_SYNC, min < 0);
+
+ hid_sensor_power_state(&st->common_attributes, false);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ *val = st->scale_pre_decml;
+ *val2 = st->scale_post_decml;
+ return st->scale_precision;
+ case IIO_CHAN_INFO_OFFSET:
+ *val = st->value_offset;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return hid_sensor_read_samp_freq_value(&st->common_attributes,
+ val, val2);
+ case IIO_CHAN_INFO_HYSTERESIS:
+ return hid_sensor_read_raw_hyst_value(&st->common_attributes,
+ val, val2);
+ default:
+ return -EINVAL;
+ }
+}
+
+/* Channel write_raw handler */
+static int hinge_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val, int val2,
+ long mask)
+{
+ struct hinge_state *st = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return hid_sensor_write_samp_freq_value(&st->common_attributes,
+ val, val2);
+ case IIO_CHAN_INFO_HYSTERESIS:
+ return hid_sensor_write_raw_hyst_value(&st->common_attributes,
+ val, val2);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int hinge_read_label(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, char *label)
+{
+ struct hinge_state *st = iio_priv(indio_dev);
+
+ return sprintf(label, "%s\n", st->labels[chan->channel]);
+}
+
+static const struct iio_info hinge_info = {
+ .read_raw = hinge_read_raw,
+ .write_raw = hinge_write_raw,
+ .read_label = hinge_read_label,
+};
+
+/*
+ * Callback handler to send event after all samples are received
+ * and captured.
+ */
+static int hinge_proc_event(struct hid_sensor_hub_device *hsdev,
+ unsigned int usage_id, void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct hinge_state *st = iio_priv(indio_dev);
+
+ if (atomic_read(&st->common_attributes.data_ready)) {
+ if (!st->timestamp)
+ st->timestamp = iio_get_time_ns(indio_dev);
+
+ iio_push_to_buffers_with_timestamp(indio_dev, &st->scan,
+ st->timestamp);
+
+ st->timestamp = 0;
+ }
+ return 0;
+}
+
+/* Capture samples in local storage */
+static int hinge_capture_sample(struct hid_sensor_hub_device *hsdev,
+ unsigned int usage_id, size_t raw_len,
+ char *raw_data, void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct hinge_state *st = iio_priv(indio_dev);
+ int offset;
+
+ switch (usage_id) {
+ case HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(1):
+ case HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(2):
+ case HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(3):
+ offset = usage_id - HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(1);
+ st->scan.hinge_val[offset] = *(u32 *)raw_data;
+ return 0;
+ case HID_USAGE_SENSOR_TIME_TIMESTAMP:
+ st->timestamp = hid_sensor_convert_timestamp(&st->common_attributes,
+ *(int64_t *)raw_data);
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+/* Parse report which is specific to an usage id */
+static int hinge_parse_report(struct platform_device *pdev,
+ struct hid_sensor_hub_device *hsdev,
+ struct iio_chan_spec *channels,
+ unsigned int usage_id, struct hinge_state *st)
+{
+ int ret;
+ int i;
+
+ for (i = 0; i < CHANNEL_SCAN_INDEX_MAX; ++i) {
+ ret = sensor_hub_input_get_attribute_info(hsdev,
+ HID_INPUT_REPORT,
+ usage_id,
+ hinge_addresses[i],
+ &st->hinge[i]);
+ if (ret < 0)
+ return ret;
+
+ hinge_adjust_channel_realbits(channels, i, st->hinge[i].size);
+ }
+
+ st->scale_precision = hid_sensor_format_scale(HID_USAGE_SENSOR_HINGE,
+ &st->hinge[CHANNEL_SCAN_INDEX_HINGE_ANGLE],
+ &st->scale_pre_decml, &st->scale_post_decml);
+
+ return ret;
+}
+
+/* Function to initialize the processing for usage id */
+static int hid_hinge_probe(struct platform_device *pdev)
+{
+ struct hinge_state *st;
+ struct iio_dev *indio_dev;
+ struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+ int ret;
+ int i;
+
+ indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*st));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, indio_dev);
+
+ st = iio_priv(indio_dev);
+ st->common_attributes.hsdev = hsdev;
+ st->common_attributes.pdev = pdev;
+ st->indio_dev = indio_dev;
+ for (i = 0; i < CHANNEL_SCAN_INDEX_MAX; i++)
+ st->labels[i] = hinge_labels[i];
+
+ ret = hid_sensor_parse_common_attributes(hsdev, hsdev->usage,
+ &st->common_attributes,
+ hinge_sensitivity_addresses,
+ ARRAY_SIZE(hinge_sensitivity_addresses));
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup common attributes\n");
+ return ret;
+ }
+
+ indio_dev->num_channels = ARRAY_SIZE(hinge_channels);
+ indio_dev->channels = devm_kmemdup(&indio_dev->dev, hinge_channels,
+ sizeof(hinge_channels), GFP_KERNEL);
+ if (!indio_dev->channels)
+ return -ENOMEM;
+
+ ret = hinge_parse_report(pdev, hsdev,
+ (struct iio_chan_spec *)indio_dev->channels,
+ hsdev->usage, st);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup attributes\n");
+ return ret;
+ }
+
+ indio_dev->info = &hinge_info;
+ indio_dev->name = "hinge";
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ atomic_set(&st->common_attributes.data_ready, 0);
+ ret = hid_sensor_setup_trigger(indio_dev, indio_dev->name,
+ &st->common_attributes);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "trigger setup failed\n");
+ return ret;
+ }
+
+ st->callbacks.send_event = hinge_proc_event;
+ st->callbacks.capture_sample = hinge_capture_sample;
+ st->callbacks.pdev = pdev;
+ ret = sensor_hub_register_callback(hsdev, hsdev->usage, &st->callbacks);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "callback reg failed\n");
+ goto error_remove_trigger;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "device register failed\n");
+ goto error_remove_callback;
+ }
+
+ return ret;
+
+error_remove_callback:
+ sensor_hub_remove_callback(hsdev, hsdev->usage);
+error_remove_trigger:
+ hid_sensor_remove_trigger(indio_dev, &st->common_attributes);
+ return ret;
+}
+
+/* Function to deinitialize the processing for usage id */
+static int hid_hinge_remove(struct platform_device *pdev)
+{
+ struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+ struct hinge_state *st = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ sensor_hub_remove_callback(hsdev, hsdev->usage);
+ hid_sensor_remove_trigger(indio_dev, &st->common_attributes);
+
+ return 0;
+}
+
+static const struct platform_device_id hid_hinge_ids[] = {
+ {
+ /* Format: HID-SENSOR-INT-usage_id_in_hex_lowercase */
+ .name = "HID-SENSOR-INT-020b",
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, hid_hinge_ids);
+
+static struct platform_driver hid_hinge_platform_driver = {
+ .id_table = hid_hinge_ids,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .pm = &hid_sensor_pm_ops,
+ },
+ .probe = hid_hinge_probe,
+ .remove = hid_hinge_remove,
+};
+module_platform_driver(hid_hinge_platform_driver);
+
+MODULE_DESCRIPTION("HID Sensor INTEL Hinge");
+MODULE_AUTHOR("Ye Xiang <xiang.ye@intel.com>");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(IIO_HID);
diff --git a/drivers/iio/position/iqs624-pos.c b/drivers/iio/position/iqs624-pos.c
new file mode 100644
index 0000000000..4d74523142
--- /dev/null
+++ b/drivers/iio/position/iqs624-pos.c
@@ -0,0 +1,285 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Azoteq IQS624/625 Angular Position Sensors
+ *
+ * Copyright (C) 2019 Jeff LaBundy <jeff@labundy.com>
+ */
+
+#include <linux/device.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/kernel.h>
+#include <linux/mfd/iqs62x.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/notifier.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define IQS624_POS_DEG_OUT 0x16
+
+#define IQS624_POS_SCALE1 (314159 / 180)
+#define IQS624_POS_SCALE2 100000
+
+struct iqs624_pos_private {
+ struct iqs62x_core *iqs62x;
+ struct iio_dev *indio_dev;
+ struct notifier_block notifier;
+ struct mutex lock;
+ bool angle_en;
+ u16 angle;
+};
+
+static int iqs624_pos_angle_en(struct iqs62x_core *iqs62x, bool angle_en)
+{
+ unsigned int event_mask = IQS624_HALL_UI_WHL_EVENT;
+
+ /*
+ * The IQS625 reports angular position in the form of coarse intervals,
+ * so only interval change events are unmasked. Conversely, the IQS624
+ * reports angular position down to one degree of resolution, so wheel
+ * movement events are unmasked instead.
+ */
+ if (iqs62x->dev_desc->prod_num == IQS625_PROD_NUM)
+ event_mask = IQS624_HALL_UI_INT_EVENT;
+
+ return regmap_update_bits(iqs62x->regmap, IQS624_HALL_UI, event_mask,
+ angle_en ? 0 : 0xFF);
+}
+
+static int iqs624_pos_notifier(struct notifier_block *notifier,
+ unsigned long event_flags, void *context)
+{
+ struct iqs62x_event_data *event_data = context;
+ struct iqs624_pos_private *iqs624_pos;
+ struct iqs62x_core *iqs62x;
+ struct iio_dev *indio_dev;
+ u16 angle = event_data->ui_data;
+ s64 timestamp;
+ int ret;
+
+ iqs624_pos = container_of(notifier, struct iqs624_pos_private,
+ notifier);
+ indio_dev = iqs624_pos->indio_dev;
+ timestamp = iio_get_time_ns(indio_dev);
+
+ iqs62x = iqs624_pos->iqs62x;
+ if (iqs62x->dev_desc->prod_num == IQS625_PROD_NUM)
+ angle = event_data->interval;
+
+ mutex_lock(&iqs624_pos->lock);
+
+ if (event_flags & BIT(IQS62X_EVENT_SYS_RESET)) {
+ ret = iqs624_pos_angle_en(iqs62x, iqs624_pos->angle_en);
+ if (ret) {
+ dev_err(indio_dev->dev.parent,
+ "Failed to re-initialize device: %d\n", ret);
+ ret = NOTIFY_BAD;
+ } else {
+ ret = NOTIFY_OK;
+ }
+ } else if (iqs624_pos->angle_en && (angle != iqs624_pos->angle)) {
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_ANGL, 0,
+ IIO_EV_TYPE_CHANGE,
+ IIO_EV_DIR_NONE),
+ timestamp);
+
+ iqs624_pos->angle = angle;
+ ret = NOTIFY_OK;
+ } else {
+ ret = NOTIFY_DONE;
+ }
+
+ mutex_unlock(&iqs624_pos->lock);
+
+ return ret;
+}
+
+static void iqs624_pos_notifier_unregister(void *context)
+{
+ struct iqs624_pos_private *iqs624_pos = context;
+ struct iio_dev *indio_dev = iqs624_pos->indio_dev;
+ int ret;
+
+ ret = blocking_notifier_chain_unregister(&iqs624_pos->iqs62x->nh,
+ &iqs624_pos->notifier);
+ if (ret)
+ dev_err(indio_dev->dev.parent,
+ "Failed to unregister notifier: %d\n", ret);
+}
+
+static int iqs624_pos_angle_get(struct iqs62x_core *iqs62x, unsigned int *val)
+{
+ int ret;
+ __le16 val_buf;
+
+ if (iqs62x->dev_desc->prod_num == IQS625_PROD_NUM)
+ return regmap_read(iqs62x->regmap, iqs62x->dev_desc->interval,
+ val);
+
+ ret = regmap_raw_read(iqs62x->regmap, IQS624_POS_DEG_OUT, &val_buf,
+ sizeof(val_buf));
+ if (ret)
+ return ret;
+
+ *val = le16_to_cpu(val_buf);
+
+ return 0;
+}
+
+static int iqs624_pos_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct iqs624_pos_private *iqs624_pos = iio_priv(indio_dev);
+ struct iqs62x_core *iqs62x = iqs624_pos->iqs62x;
+ unsigned int scale = 1;
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = iqs624_pos_angle_get(iqs62x, val);
+ if (ret)
+ return ret;
+
+ return IIO_VAL_INT;
+
+ case IIO_CHAN_INFO_SCALE:
+ if (iqs62x->dev_desc->prod_num == IQS625_PROD_NUM) {
+ ret = regmap_read(iqs62x->regmap, IQS624_INTERVAL_DIV,
+ &scale);
+ if (ret)
+ return ret;
+ }
+
+ *val = scale * IQS624_POS_SCALE1;
+ *val2 = IQS624_POS_SCALE2;
+ return IIO_VAL_FRACTIONAL;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int iqs624_pos_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 iqs624_pos_private *iqs624_pos = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&iqs624_pos->lock);
+ ret = iqs624_pos->angle_en;
+ mutex_unlock(&iqs624_pos->lock);
+
+ return ret;
+}
+
+static int iqs624_pos_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 iqs624_pos_private *iqs624_pos = iio_priv(indio_dev);
+ struct iqs62x_core *iqs62x = iqs624_pos->iqs62x;
+ unsigned int val;
+ int ret;
+
+ mutex_lock(&iqs624_pos->lock);
+
+ ret = iqs624_pos_angle_get(iqs62x, &val);
+ if (ret)
+ goto err_mutex;
+
+ ret = iqs624_pos_angle_en(iqs62x, state);
+ if (ret)
+ goto err_mutex;
+
+ iqs624_pos->angle = val;
+ iqs624_pos->angle_en = state;
+
+err_mutex:
+ mutex_unlock(&iqs624_pos->lock);
+
+ return ret;
+}
+
+static const struct iio_info iqs624_pos_info = {
+ .read_raw = &iqs624_pos_read_raw,
+ .read_event_config = iqs624_pos_read_event_config,
+ .write_event_config = iqs624_pos_write_event_config,
+};
+
+static const struct iio_event_spec iqs624_pos_events[] = {
+ {
+ .type = IIO_EV_TYPE_CHANGE,
+ .dir = IIO_EV_DIR_NONE,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_chan_spec iqs624_pos_channels[] = {
+ {
+ .type = IIO_ANGL,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .event_spec = iqs624_pos_events,
+ .num_event_specs = ARRAY_SIZE(iqs624_pos_events),
+ },
+};
+
+static int iqs624_pos_probe(struct platform_device *pdev)
+{
+ struct iqs62x_core *iqs62x = dev_get_drvdata(pdev->dev.parent);
+ struct iqs624_pos_private *iqs624_pos;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*iqs624_pos));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ iqs624_pos = iio_priv(indio_dev);
+ iqs624_pos->iqs62x = iqs62x;
+ iqs624_pos->indio_dev = indio_dev;
+
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = iqs624_pos_channels;
+ indio_dev->num_channels = ARRAY_SIZE(iqs624_pos_channels);
+ indio_dev->name = iqs62x->dev_desc->dev_name;
+ indio_dev->info = &iqs624_pos_info;
+
+ mutex_init(&iqs624_pos->lock);
+
+ iqs624_pos->notifier.notifier_call = iqs624_pos_notifier;
+ ret = blocking_notifier_chain_register(&iqs624_pos->iqs62x->nh,
+ &iqs624_pos->notifier);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register notifier: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&pdev->dev,
+ iqs624_pos_notifier_unregister,
+ iqs624_pos);
+ if (ret)
+ return ret;
+
+ return devm_iio_device_register(&pdev->dev, indio_dev);
+}
+
+static struct platform_driver iqs624_pos_platform_driver = {
+ .driver = {
+ .name = "iqs624-pos",
+ },
+ .probe = iqs624_pos_probe,
+};
+module_platform_driver(iqs624_pos_platform_driver);
+
+MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>");
+MODULE_DESCRIPTION("Azoteq IQS624/625 Angular Position Sensors");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:iqs624-pos");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 13:59:04 +0000