^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Azoteq IQS624/625 Angular Position Sensors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2019 Jeff LaBundy <jeff@labundy.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/iio/events.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/iio/iio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/mfd/iqs62x.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define IQS624_POS_DEG_OUT 0x16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define IQS624_POS_SCALE1 (314159 / 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define IQS624_POS_SCALE2 100000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct iqs624_pos_private {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct iqs62x_core *iqs62x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct notifier_block notifier;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct mutex lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) bool angle_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) u16 angle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static int iqs624_pos_angle_en(struct iqs62x_core *iqs62x, bool angle_en)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) unsigned int event_mask = IQS624_HALL_UI_WHL_EVENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * The IQS625 reports angular position in the form of coarse intervals,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * so only interval change events are unmasked. Conversely, the IQS624
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * reports angular position down to one degree of resolution, so wheel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * movement events are unmasked instead.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (iqs62x->dev_desc->prod_num == IQS625_PROD_NUM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) event_mask = IQS624_HALL_UI_INT_EVENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return regmap_update_bits(iqs62x->regmap, IQS624_HALL_UI, event_mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) angle_en ? 0 : 0xFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static int iqs624_pos_notifier(struct notifier_block *notifier,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) unsigned long event_flags, void *context)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct iqs62x_event_data *event_data = context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct iqs624_pos_private *iqs624_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct iqs62x_core *iqs62x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) u16 angle = event_data->ui_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) s64 timestamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) iqs624_pos = container_of(notifier, struct iqs624_pos_private,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) indio_dev = iqs624_pos->indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) timestamp = iio_get_time_ns(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) iqs62x = iqs624_pos->iqs62x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (iqs62x->dev_desc->prod_num == IQS625_PROD_NUM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) angle = event_data->interval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) mutex_lock(&iqs624_pos->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (event_flags & BIT(IQS62X_EVENT_SYS_RESET)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) ret = iqs624_pos_angle_en(iqs62x, iqs624_pos->angle_en);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) dev_err(indio_dev->dev.parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) "Failed to re-initialize device: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) ret = NOTIFY_BAD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ret = NOTIFY_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) } else if (iqs624_pos->angle_en && (angle != iqs624_pos->angle)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) iio_push_event(indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) IIO_UNMOD_EVENT_CODE(IIO_ANGL, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) IIO_EV_TYPE_CHANGE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) IIO_EV_DIR_NONE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) timestamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) iqs624_pos->angle = angle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ret = NOTIFY_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) ret = NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) mutex_unlock(&iqs624_pos->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static void iqs624_pos_notifier_unregister(void *context)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct iqs624_pos_private *iqs624_pos = context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct iio_dev *indio_dev = iqs624_pos->indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) ret = blocking_notifier_chain_unregister(&iqs624_pos->iqs62x->nh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) &iqs624_pos->notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) dev_err(indio_dev->dev.parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) "Failed to unregister notifier: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static int iqs624_pos_angle_get(struct iqs62x_core *iqs62x, unsigned int *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) __le16 val_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (iqs62x->dev_desc->prod_num == IQS625_PROD_NUM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return regmap_read(iqs62x->regmap, iqs62x->dev_desc->interval,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) ret = regmap_raw_read(iqs62x->regmap, IQS624_POS_DEG_OUT, &val_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) sizeof(val_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) *val = le16_to_cpu(val_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static int iqs624_pos_read_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) int *val, int *val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct iqs624_pos_private *iqs624_pos = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) struct iqs62x_core *iqs62x = iqs624_pos->iqs62x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) unsigned int scale = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) case IIO_CHAN_INFO_RAW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) ret = iqs624_pos_angle_get(iqs62x, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) case IIO_CHAN_INFO_SCALE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (iqs62x->dev_desc->prod_num == IQS625_PROD_NUM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) ret = regmap_read(iqs62x->regmap, IQS624_INTERVAL_DIV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) &scale);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) *val = scale * IQS624_POS_SCALE1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) *val2 = IQS624_POS_SCALE2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return IIO_VAL_FRACTIONAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static int iqs624_pos_read_event_config(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) const struct iio_chan_spec *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) enum iio_event_type type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) enum iio_event_direction dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) struct iqs624_pos_private *iqs624_pos = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) mutex_lock(&iqs624_pos->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) ret = iqs624_pos->angle_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) mutex_unlock(&iqs624_pos->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static int iqs624_pos_write_event_config(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) const struct iio_chan_spec *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) enum iio_event_type type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) enum iio_event_direction dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) int state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) struct iqs624_pos_private *iqs624_pos = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) struct iqs62x_core *iqs62x = iqs624_pos->iqs62x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) unsigned int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) mutex_lock(&iqs624_pos->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) ret = iqs624_pos_angle_get(iqs62x, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) goto err_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) ret = iqs624_pos_angle_en(iqs62x, state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) goto err_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) iqs624_pos->angle = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) iqs624_pos->angle_en = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) err_mutex:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) mutex_unlock(&iqs624_pos->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static const struct iio_info iqs624_pos_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) .read_raw = &iqs624_pos_read_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) .read_event_config = iqs624_pos_read_event_config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) .write_event_config = iqs624_pos_write_event_config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static const struct iio_event_spec iqs624_pos_events[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) .type = IIO_EV_TYPE_CHANGE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) .dir = IIO_EV_DIR_NONE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) .mask_separate = BIT(IIO_EV_INFO_ENABLE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static const struct iio_chan_spec iqs624_pos_channels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) .type = IIO_ANGL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) BIT(IIO_CHAN_INFO_SCALE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) .event_spec = iqs624_pos_events,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) .num_event_specs = ARRAY_SIZE(iqs624_pos_events),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static int iqs624_pos_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) struct iqs62x_core *iqs62x = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) struct iqs624_pos_private *iqs624_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*iqs624_pos));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (!indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) iqs624_pos = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) iqs624_pos->iqs62x = iqs62x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) iqs624_pos->indio_dev = indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) indio_dev->modes = INDIO_DIRECT_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) indio_dev->channels = iqs624_pos_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) indio_dev->num_channels = ARRAY_SIZE(iqs624_pos_channels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) indio_dev->name = iqs62x->dev_desc->dev_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) indio_dev->info = &iqs624_pos_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) mutex_init(&iqs624_pos->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) iqs624_pos->notifier.notifier_call = iqs624_pos_notifier;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) ret = blocking_notifier_chain_register(&iqs624_pos->iqs62x->nh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) &iqs624_pos->notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) dev_err(&pdev->dev, "Failed to register notifier: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) ret = devm_add_action_or_reset(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) iqs624_pos_notifier_unregister,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) iqs624_pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) return devm_iio_device_register(&pdev->dev, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) static struct platform_driver iqs624_pos_platform_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) .name = "iqs624-pos",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) .probe = iqs624_pos_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) module_platform_driver(iqs624_pos_platform_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) MODULE_DESCRIPTION("Azoteq IQS624/625 Angular Position Sensors");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) MODULE_ALIAS("platform:iqs624-pos");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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