// SPDX-License-Identifier: GPL-2.0 /* * AWINIC aw96103 proximity sensor driver * * Author: Wang Shuaijie * * Copyright (c) 2024 awinic Technology CO., LTD */ #include #include #include #include #include #include #include #include #include #include #include #include #define AW_DATA_PROCESS_FACTOR 1024 #define AW96103_CHIP_ID 0xa961 #define AW96103_BIN_VALID_DATA_OFFSET 64 #define AW96103_BIN_DATA_LEN_OFFSET 16 #define AW96103_BIN_DATA_REG_NUM_SIZE 4 #define AW96103_BIN_CHIP_TYPE_SIZE 8 #define AW96103_BIN_CHIP_TYPE_OFFSET 24 #define AW96103_REG_SCANCTRL0 0x0000 #define AW96103_REG_STAT0 0x0090 #define AW96103_REG_BLFILT_CH0 0x00A8 #define AW96103_REG_BLRSTRNG_CH0 0x00B4 #define AW96103_REG_DIFF_CH0 0x0240 #define AW96103_REG_FWVER2 0x0410 #define AW96103_REG_CMD 0xF008 #define AW96103_REG_IRQSRC 0xF080 #define AW96103_REG_IRQEN 0xF084 #define AW96103_REG_RESET 0xFF0C #define AW96103_REG_CHIPID 0xFF10 #define AW96103_REG_EEDA0 0x0408 #define AW96103_REG_EEDA1 0x040C #define AW96103_REG_PROXCTRL_CH0 0x00B0 #define AW96103_REG_PROXTH0_CH0 0x00B8 #define AW96103_PROXTH_CH_STEP 0x3C #define AW96103_THHYST_MASK GENMASK(13, 12) #define AW96103_INDEB_MASK GENMASK(11, 10) #define AW96103_OUTDEB_MASK GENMASK(9, 8) #define AW96103_INITOVERIRQ_MASK BIT(0) #define AW96103_BLFILT_CH_STEP 0x3C #define AW96103_BLRSTRNG_MASK GENMASK(5, 0) #define AW96103_CHIPID_MASK GENMASK(31, 16) #define AW96103_BLERRTRIG_MASK BIT(25) #define AW96103_CHAN_EN_MASK GENMASK(5, 0) #define AW96103_REG_PROXCTRL_CH(x) \ (AW96103_REG_PROXCTRL_CH0 + (x) * AW96103_PROXTH_CH_STEP) #define AW96103_REG_PROXTH0_CH(x) \ (AW96103_REG_PROXTH0_CH0 + (x) * AW96103_PROXTH_CH_STEP) /** * struct aw_bin - Store the data obtained from parsing the configuration file. * @chip_type: Frame header information-chip type * @valid_data_len: Length of valid data obtained after parsing * @valid_data_addr: The offset address of the valid data obtained * after parsing relative to info * @len: The size of the bin file obtained from the firmware * @data: Store the bin file obtained from the firmware */ struct aw_bin { unsigned char chip_type[8]; unsigned int valid_data_len; unsigned int valid_data_addr; unsigned int len; unsigned char data[] __counted_by(len); }; enum aw96103_sar_vers { AW96103 = 2, AW96103A = 6, AW96103B = 0xa, }; enum aw96103_operation_mode { AW96103_ACTIVE_MODE = 1, AW96103_SLEEP_MODE = 2, AW96103_DEEPSLEEP_MODE = 3, AW96103B_DEEPSLEEP_MODE = 4, }; enum aw96103_sensor_type { AW96103_VAL, AW96105_VAL, }; struct aw_channels_info { bool used; unsigned int old_irq_status; }; struct aw_chip_info { const char *name; struct iio_chan_spec const *channels; int num_channels; }; struct aw96103 { unsigned int hostirqen; struct regmap *regmap; struct device *dev; /* * There is one more logical channel than the actual channels, * and the extra logical channel is used for temperature detection * but not for status detection. The specific channel used for * temperature detection is determined by the register configuration. */ struct aw_channels_info channels_arr[6]; unsigned int max_channels; unsigned int chan_en; }; static const unsigned int aw96103_reg_default[] = { 0x0000, 0x00003f3f, 0x0004, 0x00000064, 0x0008, 0x0017c11e, 0x000c, 0x05000000, 0x0010, 0x00093ffd, 0x0014, 0x19240009, 0x0018, 0xd81c0207, 0x001c, 0xff000000, 0x0020, 0x00241900, 0x0024, 0x00093ff7, 0x0028, 0x58020009, 0x002c, 0xd81c0207, 0x0030, 0xff000000, 0x0034, 0x00025800, 0x0038, 0x00093fdf, 0x003c, 0x7d3b0009, 0x0040, 0xd81c0207, 0x0044, 0xff000000, 0x0048, 0x003b7d00, 0x004c, 0x00093f7f, 0x0050, 0xe9310009, 0x0054, 0xd81c0207, 0x0058, 0xff000000, 0x005c, 0x0031e900, 0x0060, 0x00093dff, 0x0064, 0x1a0c0009, 0x0068, 0xd81c0207, 0x006c, 0xff000000, 0x0070, 0x000c1a00, 0x0074, 0x80093fff, 0x0078, 0x043d0009, 0x007c, 0xd81c0207, 0x0080, 0xff000000, 0x0084, 0x003d0400, 0x00a0, 0xe6400000, 0x00a4, 0x00000000, 0x00a8, 0x010408d2, 0x00ac, 0x00000000, 0x00b0, 0x00000000, 0x00b8, 0x00005fff, 0x00bc, 0x00000000, 0x00c0, 0x00000000, 0x00c4, 0x00000000, 0x00c8, 0x00000000, 0x00cc, 0x00000000, 0x00d0, 0x00000000, 0x00d4, 0x00000000, 0x00d8, 0x00000000, 0x00dc, 0xe6447800, 0x00e0, 0x78000000, 0x00e4, 0x010408d2, 0x00e8, 0x00000000, 0x00ec, 0x00000000, 0x00f4, 0x00005fff, 0x00f8, 0x00000000, 0x00fc, 0x00000000, 0x0100, 0x00000000, 0x0104, 0x00000000, 0x0108, 0x00000000, 0x010c, 0x02000000, 0x0110, 0x00000000, 0x0114, 0x00000000, 0x0118, 0xe6447800, 0x011c, 0x78000000, 0x0120, 0x010408d2, 0x0124, 0x00000000, 0x0128, 0x00000000, 0x0130, 0x00005fff, 0x0134, 0x00000000, 0x0138, 0x00000000, 0x013c, 0x00000000, 0x0140, 0x00000000, 0x0144, 0x00000000, 0x0148, 0x02000000, 0x014c, 0x00000000, 0x0150, 0x00000000, 0x0154, 0xe6447800, 0x0158, 0x78000000, 0x015c, 0x010408d2, 0x0160, 0x00000000, 0x0164, 0x00000000, 0x016c, 0x00005fff, 0x0170, 0x00000000, 0x0174, 0x00000000, 0x0178, 0x00000000, 0x017c, 0x00000000, 0x0180, 0x00000000, 0x0184, 0x02000000, 0x0188, 0x00000000, 0x018c, 0x00000000, 0x0190, 0xe6447800, 0x0194, 0x78000000, 0x0198, 0x010408d2, 0x019c, 0x00000000, 0x01a0, 0x00000000, 0x01a8, 0x00005fff, 0x01ac, 0x00000000, 0x01b0, 0x00000000, 0x01b4, 0x00000000, 0x01b8, 0x00000000, 0x01bc, 0x00000000, 0x01c0, 0x02000000, 0x01c4, 0x00000000, 0x01c8, 0x00000000, 0x01cc, 0xe6407800, 0x01d0, 0x78000000, 0x01d4, 0x010408d2, 0x01d8, 0x00000000, 0x01dc, 0x00000000, 0x01e4, 0x00005fff, 0x01e8, 0x00000000, 0x01ec, 0x00000000, 0x01f0, 0x00000000, 0x01f4, 0x00000000, 0x01f8, 0x00000000, 0x01fc, 0x02000000, 0x0200, 0x00000000, 0x0204, 0x00000000, 0x0208, 0x00000008, 0x020c, 0x0000000d, 0x41fc, 0x00000000, 0x4400, 0x00000000, 0x4410, 0x00000000, 0x4420, 0x00000000, 0x4430, 0x00000000, 0x4440, 0x00000000, 0x4450, 0x00000000, 0x4460, 0x00000000, 0x4470, 0x00000000, 0xf080, 0x00003018, 0xf084, 0x00000fff, 0xf800, 0x00000000, 0xf804, 0x00002e00, 0xf8d0, 0x00000001, 0xf8d4, 0x00000000, 0xff00, 0x00000301, 0xff0c, 0x01000000, 0xffe0, 0x00000000, 0xfff4, 0x00004011, 0x0090, 0x00000000, 0x0094, 0x00000000, 0x0098, 0x00000000, 0x009c, 0x3f3f3f3f, }; static const struct iio_event_spec aw_common_events[3] = { { .type = IIO_EV_TYPE_THRESH, .dir = IIO_EV_DIR_RISING, .mask_separate = BIT(IIO_EV_INFO_PERIOD), }, { .type = IIO_EV_TYPE_THRESH, .dir = IIO_EV_DIR_FALLING, .mask_separate = 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 AW_IIO_CHANNEL(idx) \ { \ .type = IIO_PROXIMITY, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .indexed = 1, \ .channel = idx, \ .event_spec = aw_common_events, \ .num_event_specs = ARRAY_SIZE(aw_common_events), \ } \ static const struct iio_chan_spec aw96103_channels[] = { AW_IIO_CHANNEL(0), AW_IIO_CHANNEL(1), AW_IIO_CHANNEL(2), AW_IIO_CHANNEL(3), }; static const struct iio_chan_spec aw96105_channels[] = { AW_IIO_CHANNEL(0), AW_IIO_CHANNEL(1), AW_IIO_CHANNEL(2), AW_IIO_CHANNEL(3), AW_IIO_CHANNEL(4), AW_IIO_CHANNEL(5), }; static const struct aw_chip_info aw_chip_info_tbl[] = { [AW96103_VAL] = { .name = "aw96103_sensor", .channels = aw96103_channels, .num_channels = ARRAY_SIZE(aw96103_channels), }, [AW96105_VAL] = { .name = "aw96105_sensor", .channels = aw96105_channels, .num_channels = ARRAY_SIZE(aw96105_channels), }, }; static void aw96103_parsing_bin_file(struct aw_bin *bin) { bin->valid_data_addr = AW96103_BIN_VALID_DATA_OFFSET; bin->valid_data_len = *(unsigned int *)(bin->data + AW96103_BIN_DATA_LEN_OFFSET) - AW96103_BIN_DATA_REG_NUM_SIZE; memcpy(bin->chip_type, bin->data + AW96103_BIN_CHIP_TYPE_OFFSET, AW96103_BIN_CHIP_TYPE_SIZE); } static const struct regmap_config aw96103_regmap_confg = { .reg_bits = 16, .val_bits = 32, }; static int aw96103_get_diff_raw(struct aw96103 *aw96103, unsigned int chan, int *buf) { u32 data; int ret; ret = regmap_read(aw96103->regmap, AW96103_REG_DIFF_CH0 + chan * 4, &data); if (ret) return ret; *buf = (int)(data / AW_DATA_PROCESS_FACTOR); return 0; } static int aw96103_read_raw(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, int *val, int *val2, long mask) { struct aw96103 *aw96103 = iio_priv(indio_dev); int ret; switch (mask) { case IIO_CHAN_INFO_RAW: ret = aw96103_get_diff_raw(aw96103, chan->channel, val); if (ret) return ret; return IIO_VAL_INT; default: return -EINVAL; } } static int aw96103_read_thresh(struct aw96103 *aw96103, const struct iio_chan_spec *chan, int *val) { int ret; ret = regmap_read(aw96103->regmap, AW96103_REG_PROXTH0_CH(chan->channel), val); if (ret) return ret; return IIO_VAL_INT; } static int aw96103_read_out_debounce(struct aw96103 *aw96103, const struct iio_chan_spec *chan, int *val) { unsigned int reg_val; int ret; ret = regmap_read(aw96103->regmap, AW96103_REG_PROXCTRL_CH(chan->channel), ®_val); if (ret) return ret; *val = FIELD_GET(AW96103_OUTDEB_MASK, reg_val); return IIO_VAL_INT; } static int aw96103_read_in_debounce(struct aw96103 *aw96103, const struct iio_chan_spec *chan, int *val) { unsigned int reg_val; int ret; ret = regmap_read(aw96103->regmap, AW96103_REG_PROXCTRL_CH(chan->channel), ®_val); if (ret) return ret; *val = FIELD_GET(AW96103_INDEB_MASK, reg_val); return IIO_VAL_INT; } static int aw96103_read_hysteresis(struct aw96103 *aw96103, const struct iio_chan_spec *chan, int *val) { unsigned int reg_val; int ret; ret = regmap_read(aw96103->regmap, AW96103_REG_PROXCTRL_CH(chan->channel), ®_val); if (ret) return ret; *val = FIELD_GET(AW96103_THHYST_MASK, reg_val); return IIO_VAL_INT; } static int aw96103_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 aw96103 *aw96103 = iio_priv(indio_dev); if (chan->type != IIO_PROXIMITY) return -EINVAL; switch (info) { case IIO_EV_INFO_VALUE: return aw96103_read_thresh(aw96103, chan, val); case IIO_EV_INFO_PERIOD: switch (dir) { case IIO_EV_DIR_RISING: return aw96103_read_out_debounce(aw96103, chan, val); case IIO_EV_DIR_FALLING: return aw96103_read_in_debounce(aw96103, chan, val); default: return -EINVAL; } case IIO_EV_INFO_HYSTERESIS: return aw96103_read_hysteresis(aw96103, chan, val); default: return -EINVAL; } } static int aw96103_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 aw96103 *aw96103 = iio_priv(indio_dev); if (chan->type != IIO_PROXIMITY) return -EINVAL; switch (info) { case IIO_EV_INFO_VALUE: return regmap_write(aw96103->regmap, AW96103_REG_PROXTH0_CH(chan->channel), val); case IIO_EV_INFO_PERIOD: switch (dir) { case IIO_EV_DIR_RISING: return regmap_update_bits(aw96103->regmap, AW96103_REG_PROXCTRL_CH(chan->channel), AW96103_OUTDEB_MASK, FIELD_PREP(AW96103_OUTDEB_MASK, val)); case IIO_EV_DIR_FALLING: return regmap_update_bits(aw96103->regmap, AW96103_REG_PROXCTRL_CH(chan->channel), AW96103_INDEB_MASK, FIELD_PREP(AW96103_INDEB_MASK, val)); default: return -EINVAL; } case IIO_EV_INFO_HYSTERESIS: return regmap_update_bits(aw96103->regmap, AW96103_REG_PROXCTRL_CH(chan->channel), AW96103_THHYST_MASK, FIELD_PREP(AW96103_THHYST_MASK, val)); default: return -EINVAL; } } static int aw96103_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 aw96103 *aw96103 = iio_priv(indio_dev); return aw96103->channels_arr[chan->channel].used; } static int aw96103_write_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, bool state) { struct aw96103 *aw96103 = iio_priv(indio_dev); aw96103->channels_arr[chan->channel].used = !!state; return regmap_update_bits(aw96103->regmap, AW96103_REG_SCANCTRL0, BIT(chan->channel), state ? BIT(chan->channel) : 0); } static struct iio_info iio_info = { .read_raw = aw96103_read_raw, .read_event_value = aw96103_read_event_val, .write_event_value = aw96103_write_event_val, .read_event_config = aw96103_read_event_config, .write_event_config = aw96103_write_event_config, }; static int aw96103_channel_scan_start(struct aw96103 *aw96103) { int ret; ret = regmap_write(aw96103->regmap, AW96103_REG_CMD, AW96103_ACTIVE_MODE); if (ret) return ret; return regmap_write(aw96103->regmap, AW96103_REG_IRQEN, aw96103->hostirqen); } static int aw96103_reg_version_comp(struct aw96103 *aw96103, struct aw_bin *aw_bin) { u32 blfilt1_data, fw_ver; unsigned char i; int ret; ret = regmap_read(aw96103->regmap, AW96103_REG_FWVER2, &fw_ver); if (ret) return ret; /* * If the chip version is AW96103A and the loaded register * configuration file is for AW96103, special handling of the * AW96103_REG_BLRSTRNG_CH0 register is required. */ if ((fw_ver != AW96103A) || (aw_bin->chip_type[7] != '\0')) return 0; for (i = 0; i < aw96103->max_channels; i++) { ret = regmap_read(aw96103->regmap, AW96103_REG_BLFILT_CH0 + (AW96103_BLFILT_CH_STEP * i), &blfilt1_data); if (ret) return ret; if (FIELD_GET(AW96103_BLERRTRIG_MASK, blfilt1_data) != 1) return 0; ret = regmap_update_bits(aw96103->regmap, AW96103_REG_BLRSTRNG_CH0 + (AW96103_BLFILT_CH_STEP * i), AW96103_BLRSTRNG_MASK, 1 << i); if (ret) return ret; } return 0; } static int aw96103_bin_valid_loaded(struct aw96103 *aw96103, struct aw_bin *aw_bin_data_s) { unsigned int start_addr = aw_bin_data_s->valid_data_addr; u32 i, reg_data; u16 reg_addr; int ret; for (i = 0; i < aw_bin_data_s->valid_data_len; i += 6, start_addr += 6) { reg_addr = get_unaligned_le16(aw_bin_data_s->data + start_addr); reg_data = get_unaligned_le32(aw_bin_data_s->data + start_addr + 2); if ((reg_addr == AW96103_REG_EEDA0) || (reg_addr == AW96103_REG_EEDA1)) continue; if (reg_addr == AW96103_REG_IRQEN) { aw96103->hostirqen = reg_data; continue; } if (reg_addr == AW96103_REG_SCANCTRL0) aw96103->chan_en = FIELD_GET(AW96103_CHAN_EN_MASK, reg_data); ret = regmap_write(aw96103->regmap, reg_addr, reg_data); if (ret < 0) return ret; } ret = aw96103_reg_version_comp(aw96103, aw_bin_data_s); if (ret) return ret; return aw96103_channel_scan_start(aw96103); } static int aw96103_para_loaded(struct aw96103 *aw96103) { int i, ret; for (i = 0; i < ARRAY_SIZE(aw96103_reg_default); i += 2) { ret = regmap_write(aw96103->regmap, (u16)aw96103_reg_default[i], (u32)aw96103_reg_default[i + 1]); if (ret) return ret; if (aw96103_reg_default[i] == AW96103_REG_IRQEN) aw96103->hostirqen = aw96103_reg_default[i + 1]; else if (aw96103_reg_default[i] == AW96103_REG_SCANCTRL0) aw96103->chan_en = FIELD_GET(AW96103_CHAN_EN_MASK, aw96103_reg_default[i + 1]); } return aw96103_channel_scan_start(aw96103); } static int aw96103_cfg_all_loaded(const struct firmware *cont, struct aw96103 *aw96103) { if (!cont) return -EINVAL; struct aw_bin *aw_bin __free(kfree) = kzalloc(cont->size + sizeof(*aw_bin), GFP_KERNEL); if (!aw_bin) return -ENOMEM; aw_bin->len = cont->size; memcpy(aw_bin->data, cont->data, cont->size); release_firmware(cont); aw96103_parsing_bin_file(aw_bin); return aw96103_bin_valid_loaded(aw96103, aw_bin); } static void aw96103_cfg_update(const struct firmware *fw, void *data) { struct aw96103 *aw96103 = data; int ret, i; if (!fw || !fw->data) { dev_err(aw96103->dev, "No firmware.\n"); return; } ret = aw96103_cfg_all_loaded(fw, aw96103); /* * If loading the register configuration file fails, * load the default register configuration in the driver to * ensure the basic functionality of the device. */ if (ret) { ret = aw96103_para_loaded(aw96103); if (ret) { dev_err(aw96103->dev, "load param error.\n"); return; } } for (i = 0; i < aw96103->max_channels; i++) { if ((aw96103->chan_en >> i) & 0x01) aw96103->channels_arr[i].used = true; else aw96103->channels_arr[i].used = false; } } static int aw96103_sw_reset(struct aw96103 *aw96103) { int ret; ret = regmap_write(aw96103->regmap, AW96103_REG_RESET, 0); /* * After reset, the initialization process starts to perform and * it will last for a bout 20ms. */ msleep(20); return ret; } enum aw96103_irq_trigger_position { FAR = 0, TRIGGER_TH0 = 0x01, TRIGGER_TH1 = 0x03, TRIGGER_TH2 = 0x07, TRIGGER_TH3 = 0x0f, }; static irqreturn_t aw96103_irq(int irq, void *data) { unsigned int irq_status, curr_status_val, curr_status; struct iio_dev *indio_dev = data; struct aw96103 *aw96103 = iio_priv(indio_dev); int ret, i; ret = regmap_read(aw96103->regmap, AW96103_REG_IRQSRC, &irq_status); if (ret) return IRQ_HANDLED; ret = regmap_read(aw96103->regmap, AW96103_REG_STAT0, &curr_status_val); if (ret) return IRQ_HANDLED; /* * Iteratively analyze the interrupt status of different channels, * with each channel having 4 interrupt states. */ for (i = 0; i < aw96103->max_channels; i++) { if (!aw96103->channels_arr[i].used) continue; curr_status = (((curr_status_val >> (24 + i)) & 0x1)) | (((curr_status_val >> (16 + i)) & 0x1) << 1) | (((curr_status_val >> (8 + i)) & 0x1) << 2) | (((curr_status_val >> i) & 0x1) << 3); if (aw96103->channels_arr[i].old_irq_status == curr_status) continue; switch (curr_status) { case FAR: iio_push_event(indio_dev, IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, i, IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING), iio_get_time_ns(indio_dev)); break; case TRIGGER_TH0: case TRIGGER_TH1: case TRIGGER_TH2: case TRIGGER_TH3: iio_push_event(indio_dev, IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, i, IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING), iio_get_time_ns(indio_dev)); break; default: return IRQ_HANDLED; } aw96103->channels_arr[i].old_irq_status = curr_status; } return IRQ_HANDLED; } static int aw96103_interrupt_init(struct iio_dev *indio_dev, struct i2c_client *i2c) { struct aw96103 *aw96103 = iio_priv(indio_dev); unsigned int irq_status; int ret; ret = regmap_write(aw96103->regmap, AW96103_REG_IRQEN, 0); if (ret) return ret; ret = regmap_read(aw96103->regmap, AW96103_REG_IRQSRC, &irq_status); if (ret) return ret; ret = devm_request_threaded_irq(aw96103->dev, i2c->irq, NULL, aw96103_irq, IRQF_ONESHOT, "aw96103_irq", indio_dev); if (ret) return ret; return regmap_write(aw96103->regmap, AW96103_REG_IRQEN, aw96103->hostirqen); } static int aw96103_wait_chip_init(struct aw96103 *aw96103) { unsigned int cnt = 20; u32 reg_data; int ret; while (cnt--) { /* * The device should generate an initialization completion * interrupt within 20ms. */ ret = regmap_read(aw96103->regmap, AW96103_REG_IRQSRC, ®_data); if (ret) return ret; if (FIELD_GET(AW96103_INITOVERIRQ_MASK, reg_data)) return 0; fsleep(1000); } return -ETIMEDOUT; } static int aw96103_read_chipid(struct aw96103 *aw96103) { unsigned char cnt = 0; u32 reg_val = 0; int ret; while (cnt < 3) { /* * This retry mechanism and the subsequent delay are just * attempts to read the chip ID as much as possible, * preventing occasional communication failures from causing * the chip ID read to fail. */ ret = regmap_read(aw96103->regmap, AW96103_REG_CHIPID, ®_val); if (ret < 0) { cnt++; fsleep(2000); continue; } break; } if (cnt == 3) return -ETIMEDOUT; if (FIELD_GET(AW96103_CHIPID_MASK, reg_val) != AW96103_CHIP_ID) dev_info(aw96103->dev, "unexpected chipid, id=0x%08X\n", reg_val); return 0; } static int aw96103_i2c_probe(struct i2c_client *i2c) { const struct aw_chip_info *chip_info; struct iio_dev *indio_dev; struct aw96103 *aw96103; int ret; indio_dev = devm_iio_device_alloc(&i2c->dev, sizeof(*aw96103)); if (!indio_dev) return -ENOMEM; aw96103 = iio_priv(indio_dev); aw96103->dev = &i2c->dev; chip_info = i2c_get_match_data(i2c); aw96103->max_channels = chip_info->num_channels; aw96103->regmap = devm_regmap_init_i2c(i2c, &aw96103_regmap_confg); if (IS_ERR(aw96103->regmap)) return PTR_ERR(aw96103->regmap); ret = devm_regulator_get_enable(aw96103->dev, "vcc"); if (ret < 0) return ret; ret = aw96103_read_chipid(aw96103); if (ret) return ret; ret = aw96103_sw_reset(aw96103); if (ret) return ret; ret = aw96103_wait_chip_init(aw96103); if (ret) return ret; ret = request_firmware_nowait(THIS_MODULE, true, "aw96103_0.bin", aw96103->dev, GFP_KERNEL, aw96103, aw96103_cfg_update); if (ret) return ret; ret = aw96103_interrupt_init(indio_dev, i2c); if (ret) return ret; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->num_channels = chip_info->num_channels; indio_dev->channels = chip_info->channels; indio_dev->info = &iio_info; indio_dev->name = chip_info->name; return devm_iio_device_register(aw96103->dev, indio_dev); } static const struct of_device_id aw96103_dt_match[] = { { .compatible = "awinic,aw96103", .data = &aw_chip_info_tbl[AW96103_VAL] }, { .compatible = "awinic,aw96105", .data = &aw_chip_info_tbl[AW96105_VAL] }, { } }; MODULE_DEVICE_TABLE(of, aw96103_dt_match); static const struct i2c_device_id aw96103_i2c_id[] = { { "aw96103", (kernel_ulong_t)&aw_chip_info_tbl[AW96103_VAL] }, { "aw96105", (kernel_ulong_t)&aw_chip_info_tbl[AW96105_VAL] }, { } }; MODULE_DEVICE_TABLE(i2c, aw96103_i2c_id); static struct i2c_driver aw96103_i2c_driver = { .driver = { .name = "aw96103_sensor", .of_match_table = aw96103_dt_match, }, .probe = aw96103_i2c_probe, .id_table = aw96103_i2c_id, }; module_i2c_driver(aw96103_i2c_driver); MODULE_AUTHOR("Wang Shuaijie "); MODULE_DESCRIPTION("Driver for Awinic AW96103 proximity sensor"); MODULE_LICENSE("GPL v2");