// SPDX-License-Identifier: GPL-2.0 /* * Copyright 2018 Google LLC. * * Driver for Semtech's SX9310/SX9311 capacitive proximity/button solution. * Based on SX9500 driver and Semtech driver using the input framework * . * Reworked in April 2019 by Evan Green * and in January 2020 by Daniel Campello . */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* Register definitions. */ #define SX9310_REG_IRQ_SRC 0x00 #define SX9310_REG_STAT0 0x01 #define SX9310_REG_STAT1 0x02 #define SX9310_REG_STAT1_COMPSTAT_MASK GENMASK(3, 0) #define SX9310_REG_IRQ_MSK 0x03 #define SX9310_CONVDONE_IRQ BIT(3) #define SX9310_FAR_IRQ BIT(5) #define SX9310_CLOSE_IRQ BIT(6) #define SX9310_REG_IRQ_FUNC 0x04 #define SX9310_REG_PROX_CTRL0 0x10 #define SX9310_REG_PROX_CTRL0_SENSOREN_MASK GENMASK(3, 0) #define SX9310_REG_PROX_CTRL0_SCANPERIOD_MASK GENMASK(7, 4) #define SX9310_REG_PROX_CTRL0_SCANPERIOD_15MS 0x01 #define SX9310_REG_PROX_CTRL1 0x11 #define SX9310_REG_PROX_CTRL2 0x12 #define SX9310_REG_PROX_CTRL2_COMBMODE_MASK GENMASK(7, 6) #define SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1_CS2_CS3 (0x03 << 6) #define SX9310_REG_PROX_CTRL2_COMBMODE_CS1_CS2 (0x02 << 6) #define SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1 (0x01 << 6) #define SX9310_REG_PROX_CTRL2_COMBMODE_CS3 (0x00 << 6) #define SX9310_REG_PROX_CTRL2_SHIELDEN_MASK GENMASK(3, 2) #define SX9310_REG_PROX_CTRL2_SHIELDEN_DYNAMIC (0x01 << 2) #define SX9310_REG_PROX_CTRL2_SHIELDEN_GROUND (0x02 << 2) #define SX9310_REG_PROX_CTRL3 0x13 #define SX9310_REG_PROX_CTRL3_GAIN0_MASK GENMASK(3, 2) #define SX9310_REG_PROX_CTRL3_GAIN0_X8 (0x03 << 2) #define SX9310_REG_PROX_CTRL3_GAIN12_MASK GENMASK(1, 0) #define SX9310_REG_PROX_CTRL3_GAIN12_X4 0x02 #define SX9310_REG_PROX_CTRL4 0x14 #define SX9310_REG_PROX_CTRL4_RESOLUTION_MASK GENMASK(2, 0) #define SX9310_REG_PROX_CTRL4_RESOLUTION_FINEST 0x07 #define SX9310_REG_PROX_CTRL4_RESOLUTION_VERY_FINE 0x06 #define SX9310_REG_PROX_CTRL4_RESOLUTION_FINE 0x05 #define SX9310_REG_PROX_CTRL4_RESOLUTION_MEDIUM 0x04 #define SX9310_REG_PROX_CTRL4_RESOLUTION_MEDIUM_COARSE 0x03 #define SX9310_REG_PROX_CTRL4_RESOLUTION_COARSE 0x02 #define SX9310_REG_PROX_CTRL4_RESOLUTION_VERY_COARSE 0x01 #define SX9310_REG_PROX_CTRL4_RESOLUTION_COARSEST 0x00 #define SX9310_REG_PROX_CTRL5 0x15 #define SX9310_REG_PROX_CTRL5_RANGE_SMALL (0x03 << 6) #define SX9310_REG_PROX_CTRL5_STARTUPSENS_MASK GENMASK(3, 2) #define SX9310_REG_PROX_CTRL5_STARTUPSENS_CS1 (0x01 << 2) #define SX9310_REG_PROX_CTRL5_RAWFILT_MASK GENMASK(1, 0) #define SX9310_REG_PROX_CTRL5_RAWFILT_SHIFT 0 #define SX9310_REG_PROX_CTRL5_RAWFILT_1P25 0x02 #define SX9310_REG_PROX_CTRL6 0x16 #define SX9310_REG_PROX_CTRL6_AVGTHRESH_DEFAULT 0x20 #define SX9310_REG_PROX_CTRL7 0x17 #define SX9310_REG_PROX_CTRL7_AVGNEGFILT_2 (0x01 << 3) #define SX9310_REG_PROX_CTRL7_AVGPOSFILT_MASK GENMASK(2, 0) #define SX9310_REG_PROX_CTRL7_AVGPOSFILT_SHIFT 0 #define SX9310_REG_PROX_CTRL7_AVGPOSFILT_512 0x05 #define SX9310_REG_PROX_CTRL8 0x18 #define SX9310_REG_PROX_CTRL8_9_PTHRESH_MASK GENMASK(7, 3) #define SX9310_REG_PROX_CTRL9 0x19 #define SX9310_REG_PROX_CTRL8_9_PTHRESH_28 (0x08 << 3) #define SX9310_REG_PROX_CTRL8_9_PTHRESH_96 (0x11 << 3) #define SX9310_REG_PROX_CTRL8_9_BODYTHRESH_900 0x03 #define SX9310_REG_PROX_CTRL8_9_BODYTHRESH_1500 0x05 #define SX9310_REG_PROX_CTRL10 0x1a #define SX9310_REG_PROX_CTRL10_HYST_MASK GENMASK(5, 4) #define SX9310_REG_PROX_CTRL10_HYST_6PCT (0x01 << 4) #define SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK GENMASK(3, 2) #define SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK GENMASK(1, 0) #define SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_2 0x01 #define SX9310_REG_PROX_CTRL11 0x1b #define SX9310_REG_PROX_CTRL12 0x1c #define SX9310_REG_PROX_CTRL13 0x1d #define SX9310_REG_PROX_CTRL14 0x1e #define SX9310_REG_PROX_CTRL15 0x1f #define SX9310_REG_PROX_CTRL16 0x20 #define SX9310_REG_PROX_CTRL17 0x21 #define SX9310_REG_PROX_CTRL18 0x22 #define SX9310_REG_PROX_CTRL19 0x23 #define SX9310_REG_SAR_CTRL0 0x2a #define SX9310_REG_SAR_CTRL0_SARDEB_4_SAMPLES (0x02 << 5) #define SX9310_REG_SAR_CTRL0_SARHYST_8 (0x02 << 3) #define SX9310_REG_SAR_CTRL1 0x2b /* Each increment of the slope register is 0.0078125. */ #define SX9310_REG_SAR_CTRL1_SLOPE(_hnslope) (_hnslope / 78125) #define SX9310_REG_SAR_CTRL2 0x2c #define SX9310_REG_SAR_CTRL2_SAROFFSET_DEFAULT 0x3c #define SX9310_REG_SENSOR_SEL 0x30 #define SX9310_REG_USE_MSB 0x31 #define SX9310_REG_USE_LSB 0x32 #define SX9310_REG_AVG_MSB 0x33 #define SX9310_REG_AVG_LSB 0x34 #define SX9310_REG_DIFF_MSB 0x35 #define SX9310_REG_DIFF_LSB 0x36 #define SX9310_REG_OFFSET_MSB 0x37 #define SX9310_REG_OFFSET_LSB 0x38 #define SX9310_REG_SAR_MSB 0x39 #define SX9310_REG_SAR_LSB 0x3a #define SX9310_REG_I2C_ADDR 0x40 #define SX9310_REG_PAUSE 0x41 #define SX9310_REG_WHOAMI 0x42 #define SX9310_WHOAMI_VALUE 0x01 #define SX9311_WHOAMI_VALUE 0x02 #define SX9310_REG_RESET 0x7f #define SX9310_SOFT_RESET 0xde /* 4 hardware channels, as defined in STAT0: COMB, CS2, CS1 and CS0. */ #define SX9310_NUM_CHANNELS 4 static_assert(SX9310_NUM_CHANNELS < BITS_PER_LONG); struct sx9310_data { /* Serialize access to registers and channel configuration */ struct mutex mutex; struct i2c_client *client; struct iio_trigger *trig; struct regmap *regmap; struct regulator_bulk_data supplies[2]; /* * Last reading of the proximity status for each channel. * We only send an event to user space when this changes. */ unsigned long chan_prox_stat; bool trigger_enabled; /* Ensure correct alignment of timestamp when present. */ struct { __be16 channels[SX9310_NUM_CHANNELS]; s64 ts __aligned(8); } buffer; /* Remember enabled channels and sample rate during suspend. */ unsigned int suspend_ctrl0; struct completion completion; unsigned long chan_read; unsigned long chan_event; unsigned int whoami; }; static const struct iio_event_spec sx9310_events[] = { { .type = IIO_EV_TYPE_THRESH, .dir = IIO_EV_DIR_RISING, .mask_shared_by_all = BIT(IIO_EV_INFO_PERIOD), }, { .type = IIO_EV_TYPE_THRESH, .dir = IIO_EV_DIR_FALLING, .mask_shared_by_all = BIT(IIO_EV_INFO_PERIOD), }, { .type = IIO_EV_TYPE_THRESH, .dir = IIO_EV_DIR_EITHER, .mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_HYSTERESIS) | BIT(IIO_EV_INFO_VALUE), }, }; #define SX9310_NAMED_CHANNEL(idx, name) \ { \ .type = IIO_PROXIMITY, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ BIT(IIO_CHAN_INFO_HARDWAREGAIN), \ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ .info_mask_separate_available = \ BIT(IIO_CHAN_INFO_HARDWAREGAIN), \ .indexed = 1, \ .channel = idx, \ .extend_name = name, \ .address = SX9310_REG_DIFF_MSB, \ .event_spec = sx9310_events, \ .num_event_specs = ARRAY_SIZE(sx9310_events), \ .scan_index = idx, \ .scan_type = { \ .sign = 's', \ .realbits = 12, \ .storagebits = 16, \ .endianness = IIO_BE, \ }, \ } #define SX9310_CHANNEL(idx) SX9310_NAMED_CHANNEL(idx, NULL) static const struct iio_chan_spec sx9310_channels[] = { SX9310_CHANNEL(0), /* CS0 */ SX9310_CHANNEL(1), /* CS1 */ SX9310_CHANNEL(2), /* CS2 */ SX9310_NAMED_CHANNEL(3, "comb"), /* COMB */ IIO_CHAN_SOFT_TIMESTAMP(4), }; /* * Each entry contains the integer part (val) and the fractional part, in micro * seconds. It conforms to the IIO output IIO_VAL_INT_PLUS_MICRO. */ static const struct { int val; int val2; } sx9310_samp_freq_table[] = { { 500, 0 }, /* 0000: Min (no idle time) */ { 66, 666666 }, /* 0001: 15 ms */ { 33, 333333 }, /* 0010: 30 ms (Typ.) */ { 22, 222222 }, /* 0011: 45 ms */ { 16, 666666 }, /* 0100: 60 ms */ { 11, 111111 }, /* 0101: 90 ms */ { 8, 333333 }, /* 0110: 120 ms */ { 5, 0 }, /* 0111: 200 ms */ { 2, 500000 }, /* 1000: 400 ms */ { 1, 666666 }, /* 1001: 600 ms */ { 1, 250000 }, /* 1010: 800 ms */ { 1, 0 }, /* 1011: 1 s */ { 0, 500000 }, /* 1100: 2 s */ { 0, 333333 }, /* 1101: 3 s */ { 0, 250000 }, /* 1110: 4 s */ { 0, 200000 }, /* 1111: 5 s */ }; static const unsigned int sx9310_scan_period_table[] = { 2, 15, 30, 45, 60, 90, 120, 200, 400, 600, 800, 1000, 2000, 3000, 4000, 5000, }; static ssize_t sx9310_show_samp_freq_avail(struct device *dev, struct device_attribute *attr, char *buf) { size_t len = 0; int i; for (i = 0; i < ARRAY_SIZE(sx9310_samp_freq_table); i++) len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%d ", sx9310_samp_freq_table[i].val, sx9310_samp_freq_table[i].val2); buf[len - 1] = '\n'; return len; } static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(sx9310_show_samp_freq_avail); static const struct regmap_range sx9310_writable_reg_ranges[] = { regmap_reg_range(SX9310_REG_IRQ_MSK, SX9310_REG_IRQ_FUNC), regmap_reg_range(SX9310_REG_PROX_CTRL0, SX9310_REG_PROX_CTRL19), regmap_reg_range(SX9310_REG_SAR_CTRL0, SX9310_REG_SAR_CTRL2), regmap_reg_range(SX9310_REG_SENSOR_SEL, SX9310_REG_SENSOR_SEL), regmap_reg_range(SX9310_REG_OFFSET_MSB, SX9310_REG_OFFSET_LSB), regmap_reg_range(SX9310_REG_PAUSE, SX9310_REG_PAUSE), regmap_reg_range(SX9310_REG_RESET, SX9310_REG_RESET), }; static const struct regmap_access_table sx9310_writeable_regs = { .yes_ranges = sx9310_writable_reg_ranges, .n_yes_ranges = ARRAY_SIZE(sx9310_writable_reg_ranges), }; static const struct regmap_range sx9310_readable_reg_ranges[] = { regmap_reg_range(SX9310_REG_IRQ_SRC, SX9310_REG_IRQ_FUNC), regmap_reg_range(SX9310_REG_PROX_CTRL0, SX9310_REG_PROX_CTRL19), regmap_reg_range(SX9310_REG_SAR_CTRL0, SX9310_REG_SAR_CTRL2), regmap_reg_range(SX9310_REG_SENSOR_SEL, SX9310_REG_SAR_LSB), regmap_reg_range(SX9310_REG_I2C_ADDR, SX9310_REG_WHOAMI), regmap_reg_range(SX9310_REG_RESET, SX9310_REG_RESET), }; static const struct regmap_access_table sx9310_readable_regs = { .yes_ranges = sx9310_readable_reg_ranges, .n_yes_ranges = ARRAY_SIZE(sx9310_readable_reg_ranges), }; static const struct regmap_range sx9310_volatile_reg_ranges[] = { regmap_reg_range(SX9310_REG_IRQ_SRC, SX9310_REG_STAT1), regmap_reg_range(SX9310_REG_USE_MSB, SX9310_REG_DIFF_LSB), regmap_reg_range(SX9310_REG_SAR_MSB, SX9310_REG_SAR_LSB), regmap_reg_range(SX9310_REG_RESET, SX9310_REG_RESET), }; static const struct regmap_access_table sx9310_volatile_regs = { .yes_ranges = sx9310_volatile_reg_ranges, .n_yes_ranges = ARRAY_SIZE(sx9310_volatile_reg_ranges), }; static const struct regmap_config sx9310_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = SX9310_REG_RESET, .cache_type = REGCACHE_RBTREE, .wr_table = &sx9310_writeable_regs, .rd_table = &sx9310_readable_regs, .volatile_table = &sx9310_volatile_regs, }; static int sx9310_update_chan_en(struct sx9310_data *data, unsigned long chan_read, unsigned long chan_event) { int ret; unsigned long channels = chan_read | chan_event; if ((data->chan_read | data->chan_event) != channels) { ret = regmap_update_bits(data->regmap, SX9310_REG_PROX_CTRL0, SX9310_REG_PROX_CTRL0_SENSOREN_MASK, channels); if (ret) return ret; } data->chan_read = chan_read; data->chan_event = chan_event; return 0; } static int sx9310_get_read_channel(struct sx9310_data *data, int channel) { return sx9310_update_chan_en(data, data->chan_read | BIT(channel), data->chan_event); } static int sx9310_put_read_channel(struct sx9310_data *data, int channel) { return sx9310_update_chan_en(data, data->chan_read & ~BIT(channel), data->chan_event); } static int sx9310_get_event_channel(struct sx9310_data *data, int channel) { return sx9310_update_chan_en(data, data->chan_read, data->chan_event | BIT(channel)); } static int sx9310_put_event_channel(struct sx9310_data *data, int channel) { return sx9310_update_chan_en(data, data->chan_read, data->chan_event & ~BIT(channel)); } static int sx9310_enable_irq(struct sx9310_data *data, unsigned int irq) { if (!data->client->irq) return 0; return regmap_update_bits(data->regmap, SX9310_REG_IRQ_MSK, irq, irq); } static int sx9310_disable_irq(struct sx9310_data *data, unsigned int irq) { if (!data->client->irq) return 0; return regmap_update_bits(data->regmap, SX9310_REG_IRQ_MSK, irq, 0); } static int sx9310_read_prox_data(struct sx9310_data *data, const struct iio_chan_spec *chan, __be16 *val) { int ret; ret = regmap_write(data->regmap, SX9310_REG_SENSOR_SEL, chan->channel); if (ret) return ret; return regmap_bulk_read(data->regmap, chan->address, val, sizeof(*val)); } /* * If we have no interrupt support, we have to wait for a scan period * after enabling a channel to get a result. */ static int sx9310_wait_for_sample(struct sx9310_data *data) { int ret; unsigned int val; ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL0, &val); if (ret) return ret; val = FIELD_GET(SX9310_REG_PROX_CTRL0_SCANPERIOD_MASK, val); msleep(sx9310_scan_period_table[val]); return 0; } static int sx9310_read_proximity(struct sx9310_data *data, const struct iio_chan_spec *chan, int *val) { int ret; __be16 rawval; mutex_lock(&data->mutex); ret = sx9310_get_read_channel(data, chan->channel); if (ret) goto out; ret = sx9310_enable_irq(data, SX9310_CONVDONE_IRQ); if (ret) goto out_put_channel; mutex_unlock(&data->mutex); if (data->client->irq) { ret = wait_for_completion_interruptible(&data->completion); reinit_completion(&data->completion); } else { ret = sx9310_wait_for_sample(data); } mutex_lock(&data->mutex); if (ret) goto out_disable_irq; ret = sx9310_read_prox_data(data, chan, &rawval); if (ret) goto out_disable_irq; *val = sign_extend32(be16_to_cpu(rawval), chan->address == SX9310_REG_DIFF_MSB ? 11 : 15); ret = sx9310_disable_irq(data, SX9310_CONVDONE_IRQ); if (ret) goto out_put_channel; ret = sx9310_put_read_channel(data, chan->channel); if (ret) goto out; mutex_unlock(&data->mutex); return IIO_VAL_INT; out_disable_irq: sx9310_disable_irq(data, SX9310_CONVDONE_IRQ); out_put_channel: sx9310_put_read_channel(data, chan->channel); out: mutex_unlock(&data->mutex); return ret; } static int sx9310_read_gain(struct sx9310_data *data, const struct iio_chan_spec *chan, int *val) { unsigned int regval, gain; int ret; ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL3, ®val); if (ret) return ret; switch (chan->channel) { case 0: case 3: gain = FIELD_GET(SX9310_REG_PROX_CTRL3_GAIN0_MASK, regval); break; case 1: case 2: gain = FIELD_GET(SX9310_REG_PROX_CTRL3_GAIN12_MASK, regval); break; default: return -EINVAL; } *val = 1 << gain; return IIO_VAL_INT; } static int sx9310_read_samp_freq(struct sx9310_data *data, int *val, int *val2) { unsigned int regval; int ret; ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL0, ®val); if (ret) return ret; regval = FIELD_GET(SX9310_REG_PROX_CTRL0_SCANPERIOD_MASK, regval); *val = sx9310_samp_freq_table[regval].val; *val2 = sx9310_samp_freq_table[regval].val2; return IIO_VAL_INT_PLUS_MICRO; } static int sx9310_read_raw(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, int *val, int *val2, long mask) { struct sx9310_data *data = iio_priv(indio_dev); int ret; if (chan->type != IIO_PROXIMITY) return -EINVAL; switch (mask) { case IIO_CHAN_INFO_RAW: ret = iio_device_claim_direct_mode(indio_dev); if (ret) return ret; ret = sx9310_read_proximity(data, chan, val); iio_device_release_direct_mode(indio_dev); return ret; case IIO_CHAN_INFO_HARDWAREGAIN: ret = iio_device_claim_direct_mode(indio_dev); if (ret) return ret; ret = sx9310_read_gain(data, chan, val); iio_device_release_direct_mode(indio_dev); return ret; case IIO_CHAN_INFO_SAMP_FREQ: return sx9310_read_samp_freq(data, val, val2); default: return -EINVAL; } } static const int sx9310_gain_vals[] = { 1, 2, 4, 8 }; static int sx9310_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long mask) { if (chan->type != IIO_PROXIMITY) return -EINVAL; switch (mask) { case IIO_CHAN_INFO_HARDWAREGAIN: *type = IIO_VAL_INT; *length = ARRAY_SIZE(sx9310_gain_vals); *vals = sx9310_gain_vals; return IIO_AVAIL_LIST; } return -EINVAL; } static const unsigned int sx9310_pthresh_codes[] = { 2, 4, 6, 8, 12, 16, 20, 24, 28, 32, 40, 48, 56, 64, 72, 80, 88, 96, 112, 128, 144, 160, 192, 224, 256, 320, 384, 512, 640, 768, 1024, 1536 }; static int sx9310_get_thresh_reg(unsigned int channel) { switch (channel) { case 0: case 3: return SX9310_REG_PROX_CTRL8; case 1: case 2: return SX9310_REG_PROX_CTRL9; } return -EINVAL; } static int sx9310_read_thresh(struct sx9310_data *data, const struct iio_chan_spec *chan, int *val) { unsigned int reg; unsigned int regval; int ret; reg = ret = sx9310_get_thresh_reg(chan->channel); if (ret < 0) return ret; ret = regmap_read(data->regmap, reg, ®val); if (ret) return ret; regval = FIELD_GET(SX9310_REG_PROX_CTRL8_9_PTHRESH_MASK, regval); if (regval >= ARRAY_SIZE(sx9310_pthresh_codes)) return -EINVAL; *val = sx9310_pthresh_codes[regval]; return IIO_VAL_INT; } static int sx9310_read_hysteresis(struct sx9310_data *data, const struct iio_chan_spec *chan, int *val) { unsigned int regval, pthresh; int ret; ret = sx9310_read_thresh(data, chan, &pthresh); if (ret < 0) return ret; ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL10, ®val); if (ret) return ret; regval = FIELD_GET(SX9310_REG_PROX_CTRL10_HYST_MASK, regval); if (!regval) regval = 5; /* regval is at most 5 */ *val = pthresh >> (5 - regval); return IIO_VAL_INT; } static int sx9310_read_far_debounce(struct sx9310_data *data, int *val) { unsigned int regval; int ret; ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL10, ®val); if (ret) return ret; regval = FIELD_GET(SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK, regval); if (regval) *val = 1 << regval; else *val = 0; return IIO_VAL_INT; } static int sx9310_read_close_debounce(struct sx9310_data *data, int *val) { unsigned int regval; int ret; ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL10, ®val); if (ret) return ret; regval = FIELD_GET(SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK, regval); if (regval) *val = 1 << regval; else *val = 0; return IIO_VAL_INT; } static int sx9310_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) { struct sx9310_data *data = iio_priv(indio_dev); if (chan->type != IIO_PROXIMITY) return -EINVAL; switch (info) { case IIO_EV_INFO_VALUE: return sx9310_read_thresh(data, chan, val); case IIO_EV_INFO_PERIOD: switch (dir) { case IIO_EV_DIR_RISING: return sx9310_read_far_debounce(data, val); case IIO_EV_DIR_FALLING: return sx9310_read_close_debounce(data, val); default: return -EINVAL; } case IIO_EV_INFO_HYSTERESIS: return sx9310_read_hysteresis(data, chan, val); default: return -EINVAL; } } static int sx9310_write_thresh(struct sx9310_data *data, const struct iio_chan_spec *chan, int val) { unsigned int reg; unsigned int regval; int ret, i; reg = ret = sx9310_get_thresh_reg(chan->channel); if (ret < 0) return ret; for (i = 0; i < ARRAY_SIZE(sx9310_pthresh_codes); i++) { if (sx9310_pthresh_codes[i] == val) { regval = i; break; } } if (i == ARRAY_SIZE(sx9310_pthresh_codes)) return -EINVAL; regval = FIELD_PREP(SX9310_REG_PROX_CTRL8_9_PTHRESH_MASK, regval); mutex_lock(&data->mutex); ret = regmap_update_bits(data->regmap, reg, SX9310_REG_PROX_CTRL8_9_PTHRESH_MASK, regval); mutex_unlock(&data->mutex); return ret; } static int sx9310_write_hysteresis(struct sx9310_data *data, const struct iio_chan_spec *chan, int _val) { unsigned int hyst, val = _val; int ret, pthresh; ret = sx9310_read_thresh(data, chan, &pthresh); if (ret < 0) return ret; if (val == 0) hyst = 0; else if (val == pthresh >> 2) hyst = 3; else if (val == pthresh >> 3) hyst = 2; else if (val == pthresh >> 4) hyst = 1; else return -EINVAL; hyst = FIELD_PREP(SX9310_REG_PROX_CTRL10_HYST_MASK, hyst); mutex_lock(&data->mutex); ret = regmap_update_bits(data->regmap, SX9310_REG_PROX_CTRL10, SX9310_REG_PROX_CTRL10_HYST_MASK, hyst); mutex_unlock(&data->mutex); return ret; } static int sx9310_write_far_debounce(struct sx9310_data *data, int val) { int ret; unsigned int regval; if (val > 0) val = ilog2(val); if (!FIELD_FIT(SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK, val)) return -EINVAL; regval = FIELD_PREP(SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK, val); mutex_lock(&data->mutex); ret = regmap_update_bits(data->regmap, SX9310_REG_PROX_CTRL10, SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK, regval); mutex_unlock(&data->mutex); return ret; } static int sx9310_write_close_debounce(struct sx9310_data *data, int val) { int ret; unsigned int regval; if (val > 0) val = ilog2(val); if (!FIELD_FIT(SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK, val)) return -EINVAL; regval = FIELD_PREP(SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK, val); mutex_lock(&data->mutex); ret = regmap_update_bits(data->regmap, SX9310_REG_PROX_CTRL10, SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK, regval); mutex_unlock(&data->mutex); return ret; } static int sx9310_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) { struct sx9310_data *data = iio_priv(indio_dev); if (chan->type != IIO_PROXIMITY) return -EINVAL; switch (info) { case IIO_EV_INFO_VALUE: return sx9310_write_thresh(data, chan, val); case IIO_EV_INFO_PERIOD: switch (dir) { case IIO_EV_DIR_RISING: return sx9310_write_far_debounce(data, val); case IIO_EV_DIR_FALLING: return sx9310_write_close_debounce(data, val); default: return -EINVAL; } case IIO_EV_INFO_HYSTERESIS: return sx9310_write_hysteresis(data, chan, val); default: return -EINVAL; } } static int sx9310_set_samp_freq(struct sx9310_data *data, int val, int val2) { int i, ret; for (i = 0; i < ARRAY_SIZE(sx9310_samp_freq_table); i++) if (val == sx9310_samp_freq_table[i].val && val2 == sx9310_samp_freq_table[i].val2) break; if (i == ARRAY_SIZE(sx9310_samp_freq_table)) return -EINVAL; mutex_lock(&data->mutex); ret = regmap_update_bits( data->regmap, SX9310_REG_PROX_CTRL0, SX9310_REG_PROX_CTRL0_SCANPERIOD_MASK, FIELD_PREP(SX9310_REG_PROX_CTRL0_SCANPERIOD_MASK, i)); mutex_unlock(&data->mutex); return ret; } static int sx9310_write_gain(struct sx9310_data *data, const struct iio_chan_spec *chan, int val) { unsigned int gain, mask; int ret; gain = ilog2(val); switch (chan->channel) { case 0: case 3: mask = SX9310_REG_PROX_CTRL3_GAIN0_MASK; gain = FIELD_PREP(SX9310_REG_PROX_CTRL3_GAIN0_MASK, gain); break; case 1: case 2: mask = SX9310_REG_PROX_CTRL3_GAIN12_MASK; gain = FIELD_PREP(SX9310_REG_PROX_CTRL3_GAIN12_MASK, gain); break; default: return -EINVAL; } mutex_lock(&data->mutex); ret = regmap_update_bits(data->regmap, SX9310_REG_PROX_CTRL3, mask, gain); mutex_unlock(&data->mutex); return ret; } static int sx9310_write_raw(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, int val, int val2, long mask) { struct sx9310_data *data = iio_priv(indio_dev); if (chan->type != IIO_PROXIMITY) return -EINVAL; switch (mask) { case IIO_CHAN_INFO_SAMP_FREQ: return sx9310_set_samp_freq(data, val, val2); case IIO_CHAN_INFO_HARDWAREGAIN: return sx9310_write_gain(data, chan, val); } return -EINVAL; } static irqreturn_t sx9310_irq_handler(int irq, void *private) { struct iio_dev *indio_dev = private; struct sx9310_data *data = iio_priv(indio_dev); if (data->trigger_enabled) iio_trigger_poll(data->trig); /* * Even if no event is enabled, we need to wake the thread to clear the * interrupt state by reading SX9310_REG_IRQ_SRC. * It is not possible to do that here because regmap_read takes a mutex. */ return IRQ_WAKE_THREAD; } static void sx9310_push_events(struct iio_dev *indio_dev) { int ret; unsigned int val, chan; struct sx9310_data *data = iio_priv(indio_dev); s64 timestamp = iio_get_time_ns(indio_dev); unsigned long prox_changed; /* Read proximity state on all channels */ ret = regmap_read(data->regmap, SX9310_REG_STAT0, &val); if (ret) { dev_err(&data->client->dev, "i2c transfer error in irq\n"); return; } /* * Only iterate over channels with changes on proximity status that have * events enabled. */ prox_changed = (data->chan_prox_stat ^ val) & data->chan_event; for_each_set_bit(chan, &prox_changed, SX9310_NUM_CHANNELS) { int dir; u64 ev; dir = (val & BIT(chan)) ? IIO_EV_DIR_FALLING : IIO_EV_DIR_RISING; ev = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, chan, IIO_EV_TYPE_THRESH, dir); iio_push_event(indio_dev, ev, timestamp); } data->chan_prox_stat = val; } static irqreturn_t sx9310_irq_thread_handler(int irq, void *private) { struct iio_dev *indio_dev = private; struct sx9310_data *data = iio_priv(indio_dev); int ret; unsigned int val; mutex_lock(&data->mutex); ret = regmap_read(data->regmap, SX9310_REG_IRQ_SRC, &val); if (ret) { dev_err(&data->client->dev, "i2c transfer error in irq\n"); goto out; } if (val & (SX9310_FAR_IRQ | SX9310_CLOSE_IRQ)) sx9310_push_events(indio_dev); if (val & SX9310_CONVDONE_IRQ) complete(&data->completion); out: mutex_unlock(&data->mutex); return IRQ_HANDLED; } static int sx9310_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 sx9310_data *data = iio_priv(indio_dev); return !!(data->chan_event & BIT(chan->channel)); } static int sx9310_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 sx9310_data *data = iio_priv(indio_dev); unsigned int eventirq = SX9310_FAR_IRQ | SX9310_CLOSE_IRQ; int ret; /* If the state hasn't changed, there's nothing to do. */ if (!!(data->chan_event & BIT(chan->channel)) == state) return 0; mutex_lock(&data->mutex); if (state) { ret = sx9310_get_event_channel(data, chan->channel); if (ret) goto out_unlock; if (!(data->chan_event & ~BIT(chan->channel))) { ret = sx9310_enable_irq(data, eventirq); if (ret) sx9310_put_event_channel(data, chan->channel); } } else { ret = sx9310_put_event_channel(data, chan->channel); if (ret) goto out_unlock; if (!data->chan_event) { ret = sx9310_disable_irq(data, eventirq); if (ret) sx9310_get_event_channel(data, chan->channel); } } out_unlock: mutex_unlock(&data->mutex); return ret; } static struct attribute *sx9310_attributes[] = { &iio_dev_attr_sampling_frequency_available.dev_attr.attr, NULL }; static const struct attribute_group sx9310_attribute_group = { .attrs = sx9310_attributes, }; static const struct iio_info sx9310_info = { .attrs = &sx9310_attribute_group, .read_raw = sx9310_read_raw, .read_avail = sx9310_read_avail, .read_event_value = sx9310_read_event_val, .write_event_value = sx9310_write_event_val, .write_raw = sx9310_write_raw, .read_event_config = sx9310_read_event_config, .write_event_config = sx9310_write_event_config, }; static int sx9310_set_trigger_state(struct iio_trigger *trig, bool state) { struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); struct sx9310_data *data = iio_priv(indio_dev); int ret = 0; mutex_lock(&data->mutex); if (state) ret = sx9310_enable_irq(data, SX9310_CONVDONE_IRQ); else if (!data->chan_read) ret = sx9310_disable_irq(data, SX9310_CONVDONE_IRQ); if (ret) goto out; data->trigger_enabled = state; out: mutex_unlock(&data->mutex); return ret; } static const struct iio_trigger_ops sx9310_trigger_ops = { .set_trigger_state = sx9310_set_trigger_state, }; static irqreturn_t sx9310_trigger_handler(int irq, void *private) { struct iio_poll_func *pf = private; struct iio_dev *indio_dev = pf->indio_dev; struct sx9310_data *data = iio_priv(indio_dev); __be16 val; int bit, ret, i = 0; mutex_lock(&data->mutex); for_each_set_bit(bit, indio_dev->active_scan_mask, indio_dev->masklength) { ret = sx9310_read_prox_data(data, &indio_dev->channels[bit], &val); if (ret) goto out; data->buffer.channels[i++] = val; } iio_push_to_buffers_with_timestamp(indio_dev, &data->buffer, pf->timestamp); out: mutex_unlock(&data->mutex); iio_trigger_notify_done(indio_dev->trig); return IRQ_HANDLED; } static int sx9310_buffer_preenable(struct iio_dev *indio_dev) { struct sx9310_data *data = iio_priv(indio_dev); unsigned long channels = 0; int bit, ret; mutex_lock(&data->mutex); for_each_set_bit(bit, indio_dev->active_scan_mask, indio_dev->masklength) __set_bit(indio_dev->channels[bit].channel, &channels); ret = sx9310_update_chan_en(data, channels, data->chan_event); mutex_unlock(&data->mutex); return ret; } static int sx9310_buffer_postdisable(struct iio_dev *indio_dev) { struct sx9310_data *data = iio_priv(indio_dev); int ret; mutex_lock(&data->mutex); ret = sx9310_update_chan_en(data, 0, data->chan_event); mutex_unlock(&data->mutex); return ret; } static const struct iio_buffer_setup_ops sx9310_buffer_setup_ops = { .preenable = sx9310_buffer_preenable, .postdisable = sx9310_buffer_postdisable, }; struct sx9310_reg_default { u8 reg; u8 def; }; static const struct sx9310_reg_default sx9310_default_regs[] = { { SX9310_REG_IRQ_MSK, 0x00 }, { SX9310_REG_IRQ_FUNC, 0x00 }, /* * The lower 4 bits should not be set as it enable sensors measurements. * Turning the detection on before the configuration values are set to * good values can cause the device to return erroneous readings. */ { SX9310_REG_PROX_CTRL0, SX9310_REG_PROX_CTRL0_SCANPERIOD_15MS }, { SX9310_REG_PROX_CTRL1, 0x00 }, { SX9310_REG_PROX_CTRL2, SX9310_REG_PROX_CTRL2_COMBMODE_CS1_CS2 | SX9310_REG_PROX_CTRL2_SHIELDEN_DYNAMIC }, { SX9310_REG_PROX_CTRL3, SX9310_REG_PROX_CTRL3_GAIN0_X8 | SX9310_REG_PROX_CTRL3_GAIN12_X4 }, { SX9310_REG_PROX_CTRL4, SX9310_REG_PROX_CTRL4_RESOLUTION_FINEST }, { SX9310_REG_PROX_CTRL5, SX9310_REG_PROX_CTRL5_RANGE_SMALL | SX9310_REG_PROX_CTRL5_STARTUPSENS_CS1 | SX9310_REG_PROX_CTRL5_RAWFILT_1P25 }, { SX9310_REG_PROX_CTRL6, SX9310_REG_PROX_CTRL6_AVGTHRESH_DEFAULT }, { SX9310_REG_PROX_CTRL7, SX9310_REG_PROX_CTRL7_AVGNEGFILT_2 | SX9310_REG_PROX_CTRL7_AVGPOSFILT_512 }, { SX9310_REG_PROX_CTRL8, SX9310_REG_PROX_CTRL8_9_PTHRESH_96 | SX9310_REG_PROX_CTRL8_9_BODYTHRESH_1500 }, { SX9310_REG_PROX_CTRL9, SX9310_REG_PROX_CTRL8_9_PTHRESH_28 | SX9310_REG_PROX_CTRL8_9_BODYTHRESH_900 }, { SX9310_REG_PROX_CTRL10, SX9310_REG_PROX_CTRL10_HYST_6PCT | SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_2 }, { SX9310_REG_PROX_CTRL11, 0x00 }, { SX9310_REG_PROX_CTRL12, 0x00 }, { SX9310_REG_PROX_CTRL13, 0x00 }, { SX9310_REG_PROX_CTRL14, 0x00 }, { SX9310_REG_PROX_CTRL15, 0x00 }, { SX9310_REG_PROX_CTRL16, 0x00 }, { SX9310_REG_PROX_CTRL17, 0x00 }, { SX9310_REG_PROX_CTRL18, 0x00 }, { SX9310_REG_PROX_CTRL19, 0x00 }, { SX9310_REG_SAR_CTRL0, SX9310_REG_SAR_CTRL0_SARDEB_4_SAMPLES | SX9310_REG_SAR_CTRL0_SARHYST_8 }, { SX9310_REG_SAR_CTRL1, SX9310_REG_SAR_CTRL1_SLOPE(10781250) }, { SX9310_REG_SAR_CTRL2, SX9310_REG_SAR_CTRL2_SAROFFSET_DEFAULT }, }; /* Activate all channels and perform an initial compensation. */ static int sx9310_init_compensation(struct iio_dev *indio_dev) { struct sx9310_data *data = iio_priv(indio_dev); int ret; unsigned int val; unsigned int ctrl0; ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL0, &ctrl0); if (ret) return ret; /* run the compensation phase on all channels */ ret = regmap_write(data->regmap, SX9310_REG_PROX_CTRL0, ctrl0 | SX9310_REG_PROX_CTRL0_SENSOREN_MASK); if (ret) return ret; ret = regmap_read_poll_timeout(data->regmap, SX9310_REG_STAT1, val, !(val & SX9310_REG_STAT1_COMPSTAT_MASK), 20000, 2000000); if (ret) { if (ret == -ETIMEDOUT) dev_err(&data->client->dev, "initial compensation timed out: 0x%02x\n", val); return ret; } regmap_write(data->regmap, SX9310_REG_PROX_CTRL0, ctrl0); return ret; } static const struct sx9310_reg_default * sx9310_get_default_reg(struct device *dev, int idx, struct sx9310_reg_default *reg_def) { u32 combined[SX9310_NUM_CHANNELS]; u32 start = 0, raw = 0, pos = 0; unsigned long comb_mask = 0; int ret, i, count; const char *res; memcpy(reg_def, &sx9310_default_regs[idx], sizeof(*reg_def)); switch (reg_def->reg) { case SX9310_REG_PROX_CTRL2: if (device_property_read_bool(dev, "semtech,cs0-ground")) { reg_def->def &= ~SX9310_REG_PROX_CTRL2_SHIELDEN_MASK; reg_def->def |= SX9310_REG_PROX_CTRL2_SHIELDEN_GROUND; } count = device_property_count_u32(dev, "semtech,combined-sensors"); if (count < 0 || count > ARRAY_SIZE(combined)) break; ret = device_property_read_u32_array(dev, "semtech,combined-sensors", combined, count); if (ret) break; for (i = 0; i < count; i++) comb_mask |= BIT(combined[i]); reg_def->def &= ~SX9310_REG_PROX_CTRL2_COMBMODE_MASK; if (comb_mask == (BIT(3) | BIT(2) | BIT(1) | BIT(0))) reg_def->def |= SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1_CS2_CS3; else if (comb_mask == (BIT(1) | BIT(2))) reg_def->def |= SX9310_REG_PROX_CTRL2_COMBMODE_CS1_CS2; else if (comb_mask == (BIT(0) | BIT(1))) reg_def->def |= SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1; else if (comb_mask == BIT(3)) reg_def->def |= SX9310_REG_PROX_CTRL2_COMBMODE_CS3; break; case SX9310_REG_PROX_CTRL4: ret = device_property_read_string(dev, "semtech,resolution", &res); if (ret) break; reg_def->def &= ~SX9310_REG_PROX_CTRL4_RESOLUTION_MASK; if (!strcmp(res, "coarsest")) reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_COARSEST; else if (!strcmp(res, "very-coarse")) reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_VERY_COARSE; else if (!strcmp(res, "coarse")) reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_COARSE; else if (!strcmp(res, "medium-coarse")) reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_MEDIUM_COARSE; else if (!strcmp(res, "medium")) reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_MEDIUM; else if (!strcmp(res, "fine")) reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_FINE; else if (!strcmp(res, "very-fine")) reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_VERY_FINE; else if (!strcmp(res, "finest")) reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_FINEST; break; case SX9310_REG_PROX_CTRL5: ret = device_property_read_u32(dev, "semtech,startup-sensor", &start); if (ret) { start = FIELD_GET(SX9310_REG_PROX_CTRL5_STARTUPSENS_MASK, reg_def->def); } reg_def->def &= ~SX9310_REG_PROX_CTRL5_STARTUPSENS_MASK; reg_def->def |= FIELD_PREP(SX9310_REG_PROX_CTRL5_STARTUPSENS_MASK, start); ret = device_property_read_u32(dev, "semtech,proxraw-strength", &raw); if (ret) { raw = FIELD_GET(SX9310_REG_PROX_CTRL5_RAWFILT_MASK, reg_def->def); } else { raw = ilog2(raw); } reg_def->def &= ~SX9310_REG_PROX_CTRL5_RAWFILT_MASK; reg_def->def |= FIELD_PREP(SX9310_REG_PROX_CTRL5_RAWFILT_MASK, raw); break; case SX9310_REG_PROX_CTRL7: ret = device_property_read_u32(dev, "semtech,avg-pos-strength", &pos); if (ret) break; /* Powers of 2, except for a gap between 16 and 64 */ pos = clamp(ilog2(pos), 3, 11) - (pos >= 32 ? 4 : 3); reg_def->def &= ~SX9310_REG_PROX_CTRL7_AVGPOSFILT_MASK; reg_def->def |= FIELD_PREP(SX9310_REG_PROX_CTRL7_AVGPOSFILT_MASK, pos); break; } return reg_def; } static int sx9310_init_device(struct iio_dev *indio_dev) { struct sx9310_data *data = iio_priv(indio_dev); struct sx9310_reg_default tmp; const struct sx9310_reg_default *initval; int ret; unsigned int i, val; ret = regmap_write(data->regmap, SX9310_REG_RESET, SX9310_SOFT_RESET); if (ret) return ret; usleep_range(1000, 2000); /* power-up time is ~1ms. */ /* Clear reset interrupt state by reading SX9310_REG_IRQ_SRC. */ ret = regmap_read(data->regmap, SX9310_REG_IRQ_SRC, &val); if (ret) return ret; /* Program some sane defaults. */ for (i = 0; i < ARRAY_SIZE(sx9310_default_regs); i++) { initval = sx9310_get_default_reg(&indio_dev->dev, i, &tmp); ret = regmap_write(data->regmap, initval->reg, initval->def); if (ret) return ret; } return sx9310_init_compensation(indio_dev); } static int sx9310_set_indio_dev_name(struct device *dev, struct iio_dev *indio_dev, unsigned int whoami) { unsigned int long ddata; ddata = (uintptr_t)device_get_match_data(dev); if (ddata != whoami) { dev_err(dev, "WHOAMI does not match device data: %u\n", whoami); return -ENODEV; } switch (whoami) { case SX9310_WHOAMI_VALUE: indio_dev->name = "sx9310"; break; case SX9311_WHOAMI_VALUE: indio_dev->name = "sx9311"; break; default: dev_err(dev, "unexpected WHOAMI response: %u\n", whoami); return -ENODEV; } return 0; } static void sx9310_regulator_disable(void *_data) { struct sx9310_data *data = _data; regulator_bulk_disable(ARRAY_SIZE(data->supplies), data->supplies); } static int sx9310_probe(struct i2c_client *client) { int ret; struct device *dev = &client->dev; struct iio_dev *indio_dev; struct sx9310_data *data; indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); if (!indio_dev) return -ENOMEM; data = iio_priv(indio_dev); data->client = client; data->supplies[0].supply = "vdd"; data->supplies[1].supply = "svdd"; mutex_init(&data->mutex); init_completion(&data->completion); data->regmap = devm_regmap_init_i2c(client, &sx9310_regmap_config); if (IS_ERR(data->regmap)) return PTR_ERR(data->regmap); ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies), data->supplies); if (ret) return ret; ret = regulator_bulk_enable(ARRAY_SIZE(data->supplies), data->supplies); if (ret) return ret; /* Must wait for Tpor time after initial power up */ usleep_range(1000, 1100); ret = devm_add_action_or_reset(dev, sx9310_regulator_disable, data); if (ret) return ret; ret = regmap_read(data->regmap, SX9310_REG_WHOAMI, &data->whoami); if (ret) { dev_err(dev, "error in reading WHOAMI register: %d", ret); return ret; } ret = sx9310_set_indio_dev_name(dev, indio_dev, data->whoami); if (ret) return ret; ACPI_COMPANION_SET(&indio_dev->dev, ACPI_COMPANION(dev)); indio_dev->channels = sx9310_channels; indio_dev->num_channels = ARRAY_SIZE(sx9310_channels); indio_dev->info = &sx9310_info; indio_dev->modes = INDIO_DIRECT_MODE; i2c_set_clientdata(client, indio_dev); ret = sx9310_init_device(indio_dev); if (ret) return ret; if (client->irq) { ret = devm_request_threaded_irq(dev, client->irq, sx9310_irq_handler, sx9310_irq_thread_handler, IRQF_ONESHOT, "sx9310_event", indio_dev); if (ret) return ret; data->trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name, iio_device_id(indio_dev)); if (!data->trig) return -ENOMEM; data->trig->ops = &sx9310_trigger_ops; iio_trigger_set_drvdata(data->trig, indio_dev); ret = devm_iio_trigger_register(dev, data->trig); if (ret) return ret; } ret = devm_iio_triggered_buffer_setup(dev, indio_dev, iio_pollfunc_store_time, sx9310_trigger_handler, &sx9310_buffer_setup_ops); if (ret) return ret; return devm_iio_device_register(dev, indio_dev); } static int __maybe_unused sx9310_suspend(struct device *dev) { struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); struct sx9310_data *data = iio_priv(indio_dev); u8 ctrl0; int ret; disable_irq_nosync(data->client->irq); mutex_lock(&data->mutex); ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL0, &data->suspend_ctrl0); if (ret) goto out; ctrl0 = data->suspend_ctrl0 & ~SX9310_REG_PROX_CTRL0_SENSOREN_MASK; ret = regmap_write(data->regmap, SX9310_REG_PROX_CTRL0, ctrl0); if (ret) goto out; ret = regmap_write(data->regmap, SX9310_REG_PAUSE, 0); out: mutex_unlock(&data->mutex); return ret; } static int __maybe_unused sx9310_resume(struct device *dev) { struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); struct sx9310_data *data = iio_priv(indio_dev); int ret; mutex_lock(&data->mutex); ret = regmap_write(data->regmap, SX9310_REG_PAUSE, 1); if (ret) goto out; ret = regmap_write(data->regmap, SX9310_REG_PROX_CTRL0, data->suspend_ctrl0); out: mutex_unlock(&data->mutex); if (ret) return ret; enable_irq(data->client->irq); return 0; } static const struct dev_pm_ops sx9310_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(sx9310_suspend, sx9310_resume) }; static const struct acpi_device_id sx9310_acpi_match[] = { { "STH9310", SX9310_WHOAMI_VALUE }, { "STH9311", SX9311_WHOAMI_VALUE }, {} }; MODULE_DEVICE_TABLE(acpi, sx9310_acpi_match); static const struct of_device_id sx9310_of_match[] = { { .compatible = "semtech,sx9310", (void *)SX9310_WHOAMI_VALUE }, { .compatible = "semtech,sx9311", (void *)SX9311_WHOAMI_VALUE }, {} }; MODULE_DEVICE_TABLE(of, sx9310_of_match); static const struct i2c_device_id sx9310_id[] = { { "sx9310", SX9310_WHOAMI_VALUE }, { "sx9311", SX9311_WHOAMI_VALUE }, {} }; MODULE_DEVICE_TABLE(i2c, sx9310_id); static struct i2c_driver sx9310_driver = { .driver = { .name = "sx9310", .acpi_match_table = sx9310_acpi_match, .of_match_table = sx9310_of_match, .pm = &sx9310_pm_ops, /* * Lots of i2c transfers in probe + over 200 ms waiting in * sx9310_init_compensation() mean a slow probe; prefer async * so we don't delay boot if we're builtin to the kernel. */ .probe_type = PROBE_PREFER_ASYNCHRONOUS, }, .probe_new = sx9310_probe, .id_table = sx9310_id, }; module_i2c_driver(sx9310_driver); MODULE_AUTHOR("Gwendal Grignou "); MODULE_AUTHOR("Daniel Campello "); MODULE_DESCRIPTION("Driver for Semtech SX9310/SX9311 proximity sensor"); MODULE_LICENSE("GPL v2");