| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Rishi Gupta | 3201 | 57.39% | 1 | 5.00% |
| Javier Carrasco | 2364 | 42.38% | 14 | 70.00% |
| Jonathan Cameron | 9 | 0.16% | 1 | 5.00% |
| Uwe Kleine-König | 1 | 0.02% | 1 | 5.00% |
| Trevor Gamblin | 1 | 0.02% | 1 | 5.00% |
| Julien STEPHAN | 1 | 0.02% | 1 | 5.00% |
| Tian Tao | 1 | 0.02% | 1 | 5.00% |
| Total | 5578 | 20 |
// SPDX-License-Identifier: GPL-2.0+ /* * VEML6030, VMEL6035 and VEML7700 Ambient Light Sensors * * Copyright (c) 2019, Rishi Gupta <gupt21@gmail.com> * * VEML6030: * Datasheet: https://www.vishay.com/docs/84366/veml6030.pdf * Appnote-84367: https://www.vishay.com/docs/84367/designingveml6030.pdf * * VEML6035: * Datasheet: https://www.vishay.com/docs/84889/veml6035.pdf * Appnote-84944: https://www.vishay.com/docs/84944/designingveml6035.pdf * * VEML7700: * Datasheet: https://www.vishay.com/docs/84286/veml7700.pdf * Appnote-84323: https://www.vishay.com/docs/84323/designingveml7700.pdf */ #include <linux/bitfield.h> #include <linux/module.h> #include <linux/i2c.h> #include <linux/err.h> #include <linux/regmap.h> #include <linux/interrupt.h> #include <linux/pm_runtime.h> #include <linux/units.h> #include <linux/regulator/consumer.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/events.h> #include <linux/iio/iio-gts-helper.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> /* Device registers */ #define VEML6030_REG_ALS_CONF 0x00 #define VEML6030_REG_ALS_WH 0x01 #define VEML6030_REG_ALS_WL 0x02 #define VEML6030_REG_ALS_PSM 0x03 #define VEML6030_REG_ALS_DATA 0x04 #define VEML6030_REG_WH_DATA 0x05 #define VEML6030_REG_ALS_INT 0x06 #define VEML6030_REG_DATA(ch) (VEML6030_REG_ALS_DATA + (ch)) /* Bit masks for specific functionality */ #define VEML6030_ALS_IT GENMASK(9, 6) #define VEML6030_PSM GENMASK(2, 1) #define VEML6030_ALS_PERS GENMASK(5, 4) #define VEML6030_ALS_GAIN GENMASK(12, 11) #define VEML6030_PSM_EN BIT(0) #define VEML6030_INT_TH_LOW BIT(15) #define VEML6030_INT_TH_HIGH BIT(14) #define VEML6030_ALS_INT_EN BIT(1) #define VEML6030_ALS_SD BIT(0) #define VEML6035_GAIN_M GENMASK(12, 10) #define VEML6035_GAIN BIT(10) #define VEML6035_DG BIT(11) #define VEML6035_SENS BIT(12) #define VEML6035_INT_CHAN BIT(3) #define VEML6035_CHAN_EN BIT(2) /* Regfields */ #define VEML6030_GAIN_RF REG_FIELD(VEML6030_REG_ALS_CONF, 11, 12) #define VEML6030_IT_RF REG_FIELD(VEML6030_REG_ALS_CONF, 6, 9) #define VEML6035_GAIN_RF REG_FIELD(VEML6030_REG_ALS_CONF, 10, 12) /* Maximum scales x 10000 to work with integers */ #define VEML6030_MAX_SCALE 21504 #define VEML6035_MAX_SCALE 4096 enum veml6030_scan { VEML6030_SCAN_ALS, VEML6030_SCAN_WH, VEML6030_SCAN_TIMESTAMP, }; struct veml6030_rf { struct regmap_field *it; struct regmap_field *gain; }; struct veml603x_chip { const char *name; const struct iio_chan_spec *channels; const int num_channels; const struct reg_field gain_rf; const struct reg_field it_rf; const int max_scale; int (*hw_init)(struct iio_dev *indio_dev, struct device *dev); int (*set_info)(struct iio_dev *indio_dev); }; /* * The resolution depends on both gain and integration time. The * cur_resolution stores one of the resolution mentioned in the * table during startup and gets updated whenever integration time * or gain is changed. * * Table 'resolution and maximum detection range' in the appnotes * is visualized as a 2D array. The cur_gain stores index of gain * in this table (0-3 for VEML6030, 0-5 for VEML6035) while the * cur_integration_time holds index of integration time (0-5). */ struct veml6030_data { struct i2c_client *client; struct regmap *regmap; struct veml6030_rf rf; const struct veml603x_chip *chip; struct iio_gts gts; }; #define VEML6030_SEL_IT_25MS 0x0C #define VEML6030_SEL_IT_50MS 0x08 #define VEML6030_SEL_IT_100MS 0x00 #define VEML6030_SEL_IT_200MS 0x01 #define VEML6030_SEL_IT_400MS 0x02 #define VEML6030_SEL_IT_800MS 0x03 static const struct iio_itime_sel_mul veml6030_it_sel[] = { GAIN_SCALE_ITIME_US(25000, VEML6030_SEL_IT_25MS, 1), GAIN_SCALE_ITIME_US(50000, VEML6030_SEL_IT_50MS, 2), GAIN_SCALE_ITIME_US(100000, VEML6030_SEL_IT_100MS, 4), GAIN_SCALE_ITIME_US(200000, VEML6030_SEL_IT_200MS, 8), GAIN_SCALE_ITIME_US(400000, VEML6030_SEL_IT_400MS, 16), GAIN_SCALE_ITIME_US(800000, VEML6030_SEL_IT_800MS, 32), }; /* Gains are multiplied by 8 to work with integers. The values in the * iio-gts tables don't need corrections because the maximum value of * the scale refers to GAIN = x1, and the rest of the values are * obtained from the resulting linear function. */ #define VEML6030_SEL_MILLI_GAIN_X125 2 #define VEML6030_SEL_MILLI_GAIN_X250 3 #define VEML6030_SEL_MILLI_GAIN_X1000 0 #define VEML6030_SEL_MILLI_GAIN_X2000 1 static const struct iio_gain_sel_pair veml6030_gain_sel[] = { GAIN_SCALE_GAIN(1, VEML6030_SEL_MILLI_GAIN_X125), GAIN_SCALE_GAIN(2, VEML6030_SEL_MILLI_GAIN_X250), GAIN_SCALE_GAIN(8, VEML6030_SEL_MILLI_GAIN_X1000), GAIN_SCALE_GAIN(16, VEML6030_SEL_MILLI_GAIN_X2000), }; #define VEML6035_SEL_MILLI_GAIN_X125 4 #define VEML6035_SEL_MILLI_GAIN_X250 5 #define VEML6035_SEL_MILLI_GAIN_X500 7 #define VEML6035_SEL_MILLI_GAIN_X1000 0 #define VEML6035_SEL_MILLI_GAIN_X2000 1 #define VEML6035_SEL_MILLI_GAIN_X4000 3 static const struct iio_gain_sel_pair veml6035_gain_sel[] = { GAIN_SCALE_GAIN(1, VEML6035_SEL_MILLI_GAIN_X125), GAIN_SCALE_GAIN(2, VEML6035_SEL_MILLI_GAIN_X250), GAIN_SCALE_GAIN(4, VEML6035_SEL_MILLI_GAIN_X500), GAIN_SCALE_GAIN(8, VEML6035_SEL_MILLI_GAIN_X1000), GAIN_SCALE_GAIN(16, VEML6035_SEL_MILLI_GAIN_X2000), GAIN_SCALE_GAIN(32, VEML6035_SEL_MILLI_GAIN_X4000), }; /* * Persistence = 1/2/4/8 x integration time * Minimum time for which light readings must stay above configured * threshold to assert the interrupt. */ static const char * const period_values[] = { "0.1 0.2 0.4 0.8", "0.2 0.4 0.8 1.6", "0.4 0.8 1.6 3.2", "0.8 1.6 3.2 6.4", "0.05 0.1 0.2 0.4", "0.025 0.050 0.1 0.2" }; /* * Return list of valid period values in seconds corresponding to * the currently active integration time. */ static ssize_t in_illuminance_period_available_show(struct device *dev, struct device_attribute *attr, char *buf) { struct veml6030_data *data = iio_priv(dev_to_iio_dev(dev)); int ret, reg, x; ret = regmap_read(data->regmap, VEML6030_REG_ALS_CONF, ®); if (ret) { dev_err(&data->client->dev, "can't read als conf register %d\n", ret); return ret; } ret = ((reg >> 6) & 0xF); switch (ret) { case 0: case 1: case 2: case 3: x = ret; break; case 8: x = 4; break; case 12: x = 5; break; default: return -EINVAL; } return sysfs_emit(buf, "%s\n", period_values[x]); } static IIO_DEVICE_ATTR_RO(in_illuminance_period_available, 0); static struct attribute *veml6030_event_attributes[] = { &iio_dev_attr_in_illuminance_period_available.dev_attr.attr, NULL }; static const struct attribute_group veml6030_event_attr_group = { .attrs = veml6030_event_attributes, }; static int veml6030_als_pwr_on(struct veml6030_data *data) { int ret; ret = regmap_clear_bits(data->regmap, VEML6030_REG_ALS_CONF, VEML6030_ALS_SD); if (ret) return ret; /* Wait 4 ms to let processor & oscillator start correctly */ fsleep(4000); return 0; } static int veml6030_als_shut_down(struct veml6030_data *data) { return regmap_set_bits(data->regmap, VEML6030_REG_ALS_CONF, VEML6030_ALS_SD); } static void veml6030_als_shut_down_action(void *data) { veml6030_als_shut_down(data); } static const struct iio_event_spec veml6030_event_spec[] = { { .type = IIO_EV_TYPE_THRESH, .dir = IIO_EV_DIR_RISING, .mask_separate = BIT(IIO_EV_INFO_VALUE), }, { .type = IIO_EV_TYPE_THRESH, .dir = IIO_EV_DIR_FALLING, .mask_separate = BIT(IIO_EV_INFO_VALUE), }, { .type = IIO_EV_TYPE_THRESH, .dir = IIO_EV_DIR_EITHER, .mask_separate = BIT(IIO_EV_INFO_PERIOD) | BIT(IIO_EV_INFO_ENABLE), }, }; /* Channel number */ enum veml6030_chan { CH_ALS, CH_WHITE, }; static const struct iio_chan_spec veml6030_channels[] = { { .type = IIO_LIGHT, .channel = CH_ALS, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_PROCESSED) | BIT(IIO_CHAN_INFO_INT_TIME) | BIT(IIO_CHAN_INFO_SCALE), .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) | BIT(IIO_CHAN_INFO_SCALE), .event_spec = veml6030_event_spec, .num_event_specs = ARRAY_SIZE(veml6030_event_spec), .scan_index = VEML6030_SCAN_ALS, .scan_type = { .sign = 'u', .realbits = 16, .storagebits = 16, .endianness = IIO_CPU, }, }, { .type = IIO_INTENSITY, .channel = CH_WHITE, .modified = 1, .channel2 = IIO_MOD_LIGHT_BOTH, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_INT_TIME) | BIT(IIO_CHAN_INFO_SCALE), .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) | BIT(IIO_CHAN_INFO_SCALE), .scan_index = VEML6030_SCAN_WH, .scan_type = { .sign = 'u', .realbits = 16, .storagebits = 16, .endianness = IIO_CPU, }, }, IIO_CHAN_SOFT_TIMESTAMP(VEML6030_SCAN_TIMESTAMP), }; static const struct iio_chan_spec veml7700_channels[] = { { .type = IIO_LIGHT, .channel = CH_ALS, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_PROCESSED) | BIT(IIO_CHAN_INFO_INT_TIME) | BIT(IIO_CHAN_INFO_SCALE), .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) | BIT(IIO_CHAN_INFO_SCALE), .scan_index = VEML6030_SCAN_ALS, .scan_type = { .sign = 'u', .realbits = 16, .storagebits = 16, .endianness = IIO_CPU, }, }, { .type = IIO_INTENSITY, .channel = CH_WHITE, .modified = 1, .channel2 = IIO_MOD_LIGHT_BOTH, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_INT_TIME) | BIT(IIO_CHAN_INFO_SCALE), .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) | BIT(IIO_CHAN_INFO_SCALE), .scan_index = VEML6030_SCAN_WH, .scan_type = { .sign = 'u', .realbits = 16, .storagebits = 16, .endianness = IIO_CPU, }, }, IIO_CHAN_SOFT_TIMESTAMP(VEML6030_SCAN_TIMESTAMP), }; static const struct regmap_range veml6030_readable_ranges[] = { regmap_reg_range(VEML6030_REG_ALS_CONF, VEML6030_REG_ALS_INT), }; static const struct regmap_access_table veml6030_readable_table = { .yes_ranges = veml6030_readable_ranges, .n_yes_ranges = ARRAY_SIZE(veml6030_readable_ranges), }; static const struct regmap_range veml6030_writable_ranges[] = { regmap_reg_range(VEML6030_REG_ALS_CONF, VEML6030_REG_ALS_PSM), }; static const struct regmap_access_table veml6030_writable_table = { .yes_ranges = veml6030_writable_ranges, .n_yes_ranges = ARRAY_SIZE(veml6030_writable_ranges), }; static const struct regmap_range veml6030_volatile_ranges[] = { regmap_reg_range(VEML6030_REG_ALS_DATA, VEML6030_REG_WH_DATA), }; static const struct regmap_access_table veml6030_volatile_table = { .yes_ranges = veml6030_volatile_ranges, .n_yes_ranges = ARRAY_SIZE(veml6030_volatile_ranges), }; static const struct regmap_config veml6030_regmap_config = { .name = "veml6030_regmap", .reg_bits = 8, .val_bits = 16, .max_register = VEML6030_REG_ALS_INT, .val_format_endian = REGMAP_ENDIAN_LITTLE, .rd_table = &veml6030_readable_table, .wr_table = &veml6030_writable_table, .volatile_table = &veml6030_volatile_table, .cache_type = REGCACHE_RBTREE, }; static int veml6030_get_it(struct veml6030_data *data, int *val, int *val2) { int ret, it_idx; ret = regmap_field_read(data->rf.it, &it_idx); if (ret) return ret; ret = iio_gts_find_int_time_by_sel(&data->gts, it_idx); if (ret < 0) return ret; *val2 = ret; *val = 0; return IIO_VAL_INT_PLUS_MICRO; } static int veml6030_set_it(struct iio_dev *indio_dev, int val, int val2) { struct veml6030_data *data = iio_priv(indio_dev); int ret, gain_idx, it_idx, new_gain, prev_gain, prev_it; bool in_range; if (val || !iio_gts_valid_time(&data->gts, val2)) return -EINVAL; ret = regmap_field_read(data->rf.it, &it_idx); if (ret) return ret; ret = regmap_field_read(data->rf.gain, &gain_idx); if (ret) return ret; prev_it = iio_gts_find_int_time_by_sel(&data->gts, it_idx); if (prev_it < 0) return prev_it; if (prev_it == val2) return 0; prev_gain = iio_gts_find_gain_by_sel(&data->gts, gain_idx); if (prev_gain < 0) return prev_gain; ret = iio_gts_find_new_gain_by_gain_time_min(&data->gts, prev_gain, prev_it, val2, &new_gain, &in_range); if (ret) return ret; if (!in_range) dev_dbg(&data->client->dev, "Optimal gain out of range\n"); ret = iio_gts_find_sel_by_int_time(&data->gts, val2); if (ret < 0) return ret; ret = regmap_field_write(data->rf.it, ret); if (ret) return ret; ret = iio_gts_find_sel_by_gain(&data->gts, new_gain); if (ret < 0) return ret; return regmap_field_write(data->rf.gain, ret); } static int veml6030_read_persistence(struct iio_dev *indio_dev, int *val, int *val2) { int ret, reg, period, x, y; struct veml6030_data *data = iio_priv(indio_dev); ret = veml6030_get_it(data, &x, &y); if (ret < 0) return ret; ret = regmap_read(data->regmap, VEML6030_REG_ALS_CONF, ®); if (ret) { dev_err(&data->client->dev, "can't read als conf register %d\n", ret); } /* integration time multiplied by 1/2/4/8 */ period = y * (1 << ((reg >> 4) & 0x03)); *val = period / 1000000; *val2 = period % 1000000; return IIO_VAL_INT_PLUS_MICRO; } static int veml6030_write_persistence(struct iio_dev *indio_dev, int val, int val2) { int ret, period, x, y; struct veml6030_data *data = iio_priv(indio_dev); ret = veml6030_get_it(data, &x, &y); if (ret < 0) return ret; if (!val) { period = val2 / y; } else { if ((val == 1) && (val2 == 600000)) period = 1600000 / y; else if ((val == 3) && (val2 == 200000)) period = 3200000 / y; else if ((val == 6) && (val2 == 400000)) period = 6400000 / y; else period = -1; } if (period <= 0 || period > 8 || hweight8(period) != 1) return -EINVAL; ret = regmap_update_bits(data->regmap, VEML6030_REG_ALS_CONF, VEML6030_ALS_PERS, (ffs(period) - 1) << 4); if (ret) dev_err(&data->client->dev, "can't set persistence value %d\n", ret); return ret; } static int veml6030_set_scale(struct iio_dev *indio_dev, int val, int val2) { int ret, gain_sel, it_idx, it_sel; struct veml6030_data *data = iio_priv(indio_dev); ret = regmap_field_read(data->rf.it, &it_idx); if (ret) return ret; ret = iio_gts_find_gain_time_sel_for_scale(&data->gts, val, val2, &gain_sel, &it_sel); if (ret) return ret; ret = regmap_field_write(data->rf.it, it_sel); if (ret) return ret; ret = regmap_field_write(data->rf.gain, gain_sel); if (ret) return ret; return 0; } static int veml6030_read_thresh(struct iio_dev *indio_dev, int *val, int *val2, int dir) { int ret, reg; struct veml6030_data *data = iio_priv(indio_dev); if (dir == IIO_EV_DIR_RISING) ret = regmap_read(data->regmap, VEML6030_REG_ALS_WH, ®); else ret = regmap_read(data->regmap, VEML6030_REG_ALS_WL, ®); if (ret) { dev_err(&data->client->dev, "can't read als threshold value %d\n", ret); return ret; } *val = reg & 0xffff; return IIO_VAL_INT; } static int veml6030_write_thresh(struct iio_dev *indio_dev, int val, int val2, int dir) { int ret; struct veml6030_data *data = iio_priv(indio_dev); if (val > 0xFFFF || val < 0 || val2) return -EINVAL; if (dir == IIO_EV_DIR_RISING) { ret = regmap_write(data->regmap, VEML6030_REG_ALS_WH, val); if (ret) dev_err(&data->client->dev, "can't set high threshold %d\n", ret); } else { ret = regmap_write(data->regmap, VEML6030_REG_ALS_WL, val); if (ret) dev_err(&data->client->dev, "can't set low threshold %d\n", ret); } return ret; } static int veml6030_get_total_gain(struct veml6030_data *data) { int gain, it, reg, ret; ret = regmap_field_read(data->rf.gain, ®); if (ret) return ret; gain = iio_gts_find_gain_by_sel(&data->gts, reg); if (gain < 0) return gain; ret = regmap_field_read(data->rf.it, ®); if (ret) return ret; it = iio_gts_find_int_time_by_sel(&data->gts, reg); if (it < 0) return it; return iio_gts_get_total_gain(&data->gts, gain, it); } static int veml6030_get_scale(struct veml6030_data *data, int *val, int *val2) { int gain, it, reg, ret; ret = regmap_field_read(data->rf.gain, ®); if (ret) return ret; gain = iio_gts_find_gain_by_sel(&data->gts, reg); if (gain < 0) return gain; ret = regmap_field_read(data->rf.it, ®); if (ret) return ret; it = iio_gts_find_int_time_by_sel(&data->gts, reg); if (it < 0) return it; ret = iio_gts_get_scale(&data->gts, gain, it, val, val2); if (ret) return ret; return IIO_VAL_INT_PLUS_NANO; } static int veml6030_process_als(struct veml6030_data *data, int raw, int *val, int *val2) { int total_gain; total_gain = veml6030_get_total_gain(data); if (total_gain < 0) return total_gain; *val = raw * data->chip->max_scale / total_gain / 10000; *val2 = raw * data->chip->max_scale / total_gain % 10000 * 100; return IIO_VAL_INT_PLUS_MICRO; } /* * Provide both raw as well as light reading in lux. * light (in lux) = resolution * raw reading */ static int veml6030_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { int ret, reg; struct veml6030_data *data = iio_priv(indio_dev); struct regmap *regmap = data->regmap; struct device *dev = &data->client->dev; switch (mask) { case IIO_CHAN_INFO_RAW: case IIO_CHAN_INFO_PROCESSED: switch (chan->type) { case IIO_LIGHT: ret = regmap_read(regmap, VEML6030_REG_ALS_DATA, ®); if (ret < 0) { dev_err(dev, "can't read als data %d\n", ret); return ret; } if (mask == IIO_CHAN_INFO_PROCESSED) return veml6030_process_als(data, reg, val, val2); *val = reg; return IIO_VAL_INT; case IIO_INTENSITY: ret = regmap_read(regmap, VEML6030_REG_WH_DATA, ®); if (ret < 0) { dev_err(dev, "can't read white data %d\n", ret); return ret; } *val = reg; return IIO_VAL_INT; default: return -EINVAL; } case IIO_CHAN_INFO_INT_TIME: return veml6030_get_it(data, val, val2); case IIO_CHAN_INFO_SCALE: return veml6030_get_scale(data, val, val2); default: return -EINVAL; } } static int veml6030_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long mask) { struct veml6030_data *data = iio_priv(indio_dev); switch (mask) { case IIO_CHAN_INFO_INT_TIME: return iio_gts_avail_times(&data->gts, vals, type, length); case IIO_CHAN_INFO_SCALE: return iio_gts_all_avail_scales(&data->gts, vals, type, length); } return -EINVAL; } static int veml6030_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { switch (mask) { case IIO_CHAN_INFO_INT_TIME: return veml6030_set_it(indio_dev, val, val2); case IIO_CHAN_INFO_SCALE: return veml6030_set_scale(indio_dev, val, val2); default: return -EINVAL; } } static int veml6030_write_raw_get_fmt(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, long mask) { switch (mask) { case IIO_CHAN_INFO_SCALE: return IIO_VAL_INT_PLUS_NANO; case IIO_CHAN_INFO_INT_TIME: return IIO_VAL_INT_PLUS_MICRO; default: return -EINVAL; } } static int veml6030_read_event_val(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int *val, int *val2) { switch (info) { case IIO_EV_INFO_VALUE: switch (dir) { case IIO_EV_DIR_RISING: case IIO_EV_DIR_FALLING: return veml6030_read_thresh(indio_dev, val, val2, dir); default: return -EINVAL; } break; case IIO_EV_INFO_PERIOD: return veml6030_read_persistence(indio_dev, val, val2); default: return -EINVAL; } } static int veml6030_write_event_val(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int val, int val2) { switch (info) { case IIO_EV_INFO_VALUE: return veml6030_write_thresh(indio_dev, val, val2, dir); case IIO_EV_INFO_PERIOD: return veml6030_write_persistence(indio_dev, val, val2); default: return -EINVAL; } } static int veml6030_read_interrupt_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir) { int ret, reg; struct veml6030_data *data = iio_priv(indio_dev); ret = regmap_read(data->regmap, VEML6030_REG_ALS_CONF, ®); if (ret) { dev_err(&data->client->dev, "can't read als conf register %d\n", ret); return ret; } if (reg & VEML6030_ALS_INT_EN) return 1; else return 0; } /* * Sensor should not be measuring light when interrupt is configured. * Therefore correct sequence to configure interrupt functionality is: * shut down -> enable/disable interrupt -> power on * * state = 1 enables interrupt, state = 0 disables interrupt */ static int veml6030_write_interrupt_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, bool state) { int ret; struct veml6030_data *data = iio_priv(indio_dev); ret = veml6030_als_shut_down(data); if (ret < 0) { dev_err(&data->client->dev, "can't disable als to configure interrupt %d\n", ret); return ret; } /* enable interrupt + power on */ ret = regmap_update_bits(data->regmap, VEML6030_REG_ALS_CONF, VEML6030_ALS_INT_EN | VEML6030_ALS_SD, state << 1); if (ret) dev_err(&data->client->dev, "can't enable interrupt & poweron als %d\n", ret); return ret; } static const struct iio_info veml6030_info = { .read_raw = veml6030_read_raw, .read_avail = veml6030_read_avail, .write_raw = veml6030_write_raw, .write_raw_get_fmt = veml6030_write_raw_get_fmt, .read_event_value = veml6030_read_event_val, .write_event_value = veml6030_write_event_val, .read_event_config = veml6030_read_interrupt_config, .write_event_config = veml6030_write_interrupt_config, .event_attrs = &veml6030_event_attr_group, }; static const struct iio_info veml6030_info_no_irq = { .read_raw = veml6030_read_raw, .read_avail = veml6030_read_avail, .write_raw = veml6030_write_raw, .write_raw_get_fmt = veml6030_write_raw_get_fmt, }; static irqreturn_t veml6030_event_handler(int irq, void *private) { int ret, reg, evtdir; struct iio_dev *indio_dev = private; struct veml6030_data *data = iio_priv(indio_dev); ret = regmap_read(data->regmap, VEML6030_REG_ALS_INT, ®); if (ret) { dev_err(&data->client->dev, "can't read als interrupt register %d\n", ret); return IRQ_HANDLED; } /* Spurious interrupt handling */ if (!(reg & (VEML6030_INT_TH_HIGH | VEML6030_INT_TH_LOW))) return IRQ_NONE; if (reg & VEML6030_INT_TH_HIGH) evtdir = IIO_EV_DIR_RISING; else evtdir = IIO_EV_DIR_FALLING; iio_push_event(indio_dev, IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0, IIO_EV_TYPE_THRESH, evtdir), iio_get_time_ns(indio_dev)); return IRQ_HANDLED; } static irqreturn_t veml6030_trigger_handler(int irq, void *p) { struct iio_poll_func *pf = p; struct iio_dev *iio = pf->indio_dev; struct veml6030_data *data = iio_priv(iio); unsigned int reg; int ch, ret, i = 0; struct { u16 chans[2]; aligned_s64 timestamp; } scan; memset(&scan, 0, sizeof(scan)); iio_for_each_active_channel(iio, ch) { ret = regmap_read(data->regmap, VEML6030_REG_DATA(ch), ®); if (ret) goto done; scan.chans[i++] = reg; } iio_push_to_buffers_with_timestamp(iio, &scan, pf->timestamp); done: iio_trigger_notify_done(iio->trig); return IRQ_HANDLED; } static int veml6030_set_info(struct iio_dev *indio_dev) { struct veml6030_data *data = iio_priv(indio_dev); struct i2c_client *client = data->client; int ret; if (client->irq) { ret = devm_request_threaded_irq(&client->dev, client->irq, NULL, veml6030_event_handler, IRQF_TRIGGER_LOW | IRQF_ONESHOT, indio_dev->name, indio_dev); if (ret < 0) return dev_err_probe(&client->dev, ret, "irq %d request failed\n", client->irq); indio_dev->info = &veml6030_info; } else { indio_dev->info = &veml6030_info_no_irq; } return 0; } static int veml7700_set_info(struct iio_dev *indio_dev) { indio_dev->info = &veml6030_info_no_irq; return 0; } static int veml6030_regfield_init(struct iio_dev *indio_dev) { struct veml6030_data *data = iio_priv(indio_dev); struct regmap *regmap = data->regmap; struct device *dev = &data->client->dev; struct regmap_field *rm_field; struct veml6030_rf *rf = &data->rf; rm_field = devm_regmap_field_alloc(dev, regmap, data->chip->it_rf); if (IS_ERR(rm_field)) return PTR_ERR(rm_field); rf->it = rm_field; rm_field = devm_regmap_field_alloc(dev, regmap, data->chip->gain_rf); if (IS_ERR(rm_field)) return PTR_ERR(rm_field); rf->gain = rm_field; return 0; } /* * Set ALS gain to 1/8, integration time to 100 ms, PSM to mode 2, * persistence to 1 x integration time and the threshold * interrupt disabled by default. First shutdown the sensor, * update registers and then power on the sensor. */ static int veml6030_hw_init(struct iio_dev *indio_dev, struct device *dev) { int ret, val; struct veml6030_data *data = iio_priv(indio_dev); ret = devm_iio_init_iio_gts(dev, 2, 150400000, veml6030_gain_sel, ARRAY_SIZE(veml6030_gain_sel), veml6030_it_sel, ARRAY_SIZE(veml6030_it_sel), &data->gts); if (ret) return dev_err_probe(dev, ret, "failed to init iio gts\n"); ret = veml6030_als_shut_down(data); if (ret) return dev_err_probe(dev, ret, "can't shutdown als\n"); ret = regmap_write(data->regmap, VEML6030_REG_ALS_CONF, 0x1001); if (ret) return dev_err_probe(dev, ret, "can't setup als configs\n"); ret = regmap_update_bits(data->regmap, VEML6030_REG_ALS_PSM, VEML6030_PSM | VEML6030_PSM_EN, 0x03); if (ret) return dev_err_probe(dev, ret, "can't setup default PSM\n"); ret = regmap_write(data->regmap, VEML6030_REG_ALS_WH, 0xFFFF); if (ret) return dev_err_probe(dev, ret, "can't setup high threshold\n"); ret = regmap_write(data->regmap, VEML6030_REG_ALS_WL, 0x0000); if (ret) return dev_err_probe(dev, ret, "can't setup low threshold\n"); ret = veml6030_als_pwr_on(data); if (ret) return dev_err_probe(dev, ret, "can't poweron als\n"); ret = devm_add_action_or_reset(dev, veml6030_als_shut_down_action, data); if (ret < 0) return ret; /* Clear stale interrupt status bits if any during start */ ret = regmap_read(data->regmap, VEML6030_REG_ALS_INT, &val); if (ret < 0) return dev_err_probe(dev, ret, "can't clear als interrupt status\n"); return ret; } /* * Set ALS gain to 1/8, integration time to 100 ms, ALS and WHITE * channel enabled, ALS channel interrupt, PSM enabled, * PSM_WAIT = 0.8 s, persistence to 1 x integration time and the * threshold interrupt disabled by default. First shutdown the sensor, * update registers and then power on the sensor. */ static int veml6035_hw_init(struct iio_dev *indio_dev, struct device *dev) { int ret, val; struct veml6030_data *data = iio_priv(indio_dev); ret = devm_iio_init_iio_gts(dev, 0, 409600000, veml6035_gain_sel, ARRAY_SIZE(veml6035_gain_sel), veml6030_it_sel, ARRAY_SIZE(veml6030_it_sel), &data->gts); if (ret) return dev_err_probe(dev, ret, "failed to init iio gts\n"); ret = veml6030_als_shut_down(data); if (ret) return dev_err_probe(dev, ret, "can't shutdown als\n"); ret = regmap_write(data->regmap, VEML6030_REG_ALS_CONF, VEML6035_SENS | VEML6035_CHAN_EN | VEML6030_ALS_SD); if (ret) return dev_err_probe(dev, ret, "can't setup als configs\n"); ret = regmap_update_bits(data->regmap, VEML6030_REG_ALS_PSM, VEML6030_PSM | VEML6030_PSM_EN, 0x03); if (ret) return dev_err_probe(dev, ret, "can't setup default PSM\n"); ret = regmap_write(data->regmap, VEML6030_REG_ALS_WH, 0xFFFF); if (ret) return dev_err_probe(dev, ret, "can't setup high threshold\n"); ret = regmap_write(data->regmap, VEML6030_REG_ALS_WL, 0x0000); if (ret) return dev_err_probe(dev, ret, "can't setup low threshold\n"); ret = veml6030_als_pwr_on(data); if (ret) return dev_err_probe(dev, ret, "can't poweron als\n"); ret = devm_add_action_or_reset(dev, veml6030_als_shut_down_action, data); if (ret < 0) return ret; /* Clear stale interrupt status bits if any during start */ ret = regmap_read(data->regmap, VEML6030_REG_ALS_INT, &val); if (ret < 0) return dev_err_probe(dev, ret, "can't clear als interrupt status\n"); return 0; } static int veml6030_probe(struct i2c_client *client) { int ret; struct veml6030_data *data; struct iio_dev *indio_dev; struct regmap *regmap; if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) return dev_err_probe(&client->dev, -EOPNOTSUPP, "i2c adapter doesn't support plain i2c\n"); regmap = devm_regmap_init_i2c(client, &veml6030_regmap_config); if (IS_ERR(regmap)) return dev_err_probe(&client->dev, PTR_ERR(regmap), "can't setup regmap\n"); indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); if (!indio_dev) return -ENOMEM; data = iio_priv(indio_dev); i2c_set_clientdata(client, indio_dev); data->client = client; data->regmap = regmap; ret = devm_regulator_get_enable(&client->dev, "vdd"); if (ret) return dev_err_probe(&client->dev, ret, "failed to enable regulator\n"); data->chip = i2c_get_match_data(client); if (!data->chip) return -EINVAL; indio_dev->name = data->chip->name; indio_dev->channels = data->chip->channels; indio_dev->num_channels = data->chip->num_channels; indio_dev->modes = INDIO_DIRECT_MODE; ret = data->chip->set_info(indio_dev); if (ret < 0) return ret; ret = veml6030_regfield_init(indio_dev); if (ret) return dev_err_probe(&client->dev, ret, "failed to init regfields\n"); ret = data->chip->hw_init(indio_dev, &client->dev); if (ret < 0) return ret; ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev, NULL, veml6030_trigger_handler, NULL); if (ret) return dev_err_probe(&client->dev, ret, "Failed to register triggered buffer"); return devm_iio_device_register(&client->dev, indio_dev); } static int veml6030_runtime_suspend(struct device *dev) { int ret; struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); struct veml6030_data *data = iio_priv(indio_dev); ret = veml6030_als_shut_down(data); if (ret < 0) dev_err(&data->client->dev, "can't suspend als %d\n", ret); return ret; } static int veml6030_runtime_resume(struct device *dev) { int ret; struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); struct veml6030_data *data = iio_priv(indio_dev); ret = veml6030_als_pwr_on(data); if (ret < 0) dev_err(&data->client->dev, "can't resume als %d\n", ret); return ret; } static DEFINE_RUNTIME_DEV_PM_OPS(veml6030_pm_ops, veml6030_runtime_suspend, veml6030_runtime_resume, NULL); static const struct veml603x_chip veml6030_chip = { .name = "veml6030", .channels = veml6030_channels, .num_channels = ARRAY_SIZE(veml6030_channels), .gain_rf = VEML6030_GAIN_RF, .it_rf = VEML6030_IT_RF, .max_scale = VEML6030_MAX_SCALE, .hw_init = veml6030_hw_init, .set_info = veml6030_set_info, }; static const struct veml603x_chip veml6035_chip = { .name = "veml6035", .channels = veml6030_channels, .num_channels = ARRAY_SIZE(veml6030_channels), .gain_rf = VEML6035_GAIN_RF, .it_rf = VEML6030_IT_RF, .max_scale = VEML6035_MAX_SCALE, .hw_init = veml6035_hw_init, .set_info = veml6030_set_info, }; static const struct veml603x_chip veml7700_chip = { .name = "veml7700", .channels = veml7700_channels, .num_channels = ARRAY_SIZE(veml7700_channels), .gain_rf = VEML6030_GAIN_RF, .it_rf = VEML6030_IT_RF, .max_scale = VEML6030_MAX_SCALE, .hw_init = veml6030_hw_init, .set_info = veml7700_set_info, }; static const struct of_device_id veml6030_of_match[] = { { .compatible = "vishay,veml6030", .data = &veml6030_chip, }, { .compatible = "vishay,veml6035", .data = &veml6035_chip, }, { .compatible = "vishay,veml7700", .data = &veml7700_chip, }, { } }; MODULE_DEVICE_TABLE(of, veml6030_of_match); static const struct i2c_device_id veml6030_id[] = { { "veml6030", (kernel_ulong_t)&veml6030_chip}, { "veml6035", (kernel_ulong_t)&veml6035_chip}, { "veml7700", (kernel_ulong_t)&veml7700_chip}, { } }; MODULE_DEVICE_TABLE(i2c, veml6030_id); static struct i2c_driver veml6030_driver = { .driver = { .name = "veml6030", .of_match_table = veml6030_of_match, .pm = pm_ptr(&veml6030_pm_ops), }, .probe = veml6030_probe, .id_table = veml6030_id, }; module_i2c_driver(veml6030_driver); MODULE_AUTHOR("Rishi Gupta <gupt21@gmail.com>"); MODULE_DESCRIPTION("VEML6030 Ambient Light Sensor"); MODULE_LICENSE("GPL v2"); MODULE_IMPORT_NS("IIO_GTS_HELPER");
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