On 17/08/15 18:30, Matt Ranostay wrote:
> APDS9960 is a combination of ALS, proximity, and gesture sensors.
>
> This patch adds support for these functions along with gain control,
> integration time, and event thresholds.
>
> Signed-off-by: Matt Ranostay <mranostay@xxxxxxxxx>
Applied to the togreg branch of iio.git - initially pushed out as
testing for the autobuilders to play with it.
Thanks,
Jonathan
> ---
> drivers/iio/light/Kconfig | 13 +
> drivers/iio/light/Makefile | 1 +
> drivers/iio/light/apds9960.c | 1135 ++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 1149 insertions(+)
> create mode 100644 drivers/iio/light/apds9960.c
>
> diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
> index 7ed859a..19b9a17 100644
> --- a/drivers/iio/light/Kconfig
> +++ b/drivers/iio/light/Kconfig
> @@ -50,6 +50,19 @@ config APDS9300
> To compile this driver as a module, choose M here: the
> module will be called apds9300.
>
> +config APDS9960
> + tristate "Avago APDS9960 gesture/RGB/ALS/proximity sensor"
> + select REGMAP_I2C
> + select IIO_BUFFER
> + select IIO_KFIFO_BUF
> + depends on I2C
> + help
> + Say Y here to build I2C interface support for the Avago
> + APDS9960 gesture/RGB/ALS/proximity sensor.
> +
> + To compile this driver as a module, choose M here: the
> + module will be called apds9960
> +
> config BH1750
> tristate "ROHM BH1750 ambient light sensor"
> depends on I2C
> diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
> index 91c74c0..7b22445 100644
> --- a/drivers/iio/light/Makefile
> +++ b/drivers/iio/light/Makefile
> @@ -7,6 +7,7 @@ obj-$(CONFIG_ACPI_ALS) += acpi-als.o
> obj-$(CONFIG_ADJD_S311) += adjd_s311.o
> obj-$(CONFIG_AL3320A) += al3320a.o
> obj-$(CONFIG_APDS9300) += apds9300.o
> +obj-$(CONFIG_APDS9960) += apds9960.o
> obj-$(CONFIG_BH1750) += bh1750.o
> obj-$(CONFIG_CM32181) += cm32181.o
> obj-$(CONFIG_CM3232) += cm3232.o
> diff --git a/drivers/iio/light/apds9960.c b/drivers/iio/light/apds9960.c
> new file mode 100644
> index 0000000..27f4157
> --- /dev/null
> +++ b/drivers/iio/light/apds9960.c
> @@ -0,0 +1,1135 @@
> +/*
> + * apds9960.c - Support for Avago APDS9960 gesture/RGB/ALS/proximity sensor
> + *
> + * Copyright (C) 2015 Matt Ranostay <mranostay@xxxxxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * TODO: gesture + proximity calib offsets
> + */
> +
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/interrupt.h>
> +#include <linux/delay.h>
> +#include <linux/mutex.h>
> +#include <linux/err.h>
> +#include <linux/irq.h>
> +#include <linux/gpio.h>
> +#include <linux/i2c.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regmap.h>
> +#include <linux/iio/iio.h>
> +#include <linux/iio/buffer.h>
> +#include <linux/iio/events.h>
> +#include <linux/iio/kfifo_buf.h>
> +#include <linux/iio/sysfs.h>
> +#include <linux/of_gpio.h>
> +
> +#define APDS9960_REGMAP_NAME "apds9960_regmap"
> +#define APDS9960_DRV_NAME "apds9960"
> +
> +#define APDS9960_REG_RAM_START 0x00
> +#define APDS9960_REG_RAM_END 0x7f
> +
> +#define APDS9960_REG_ENABLE 0x80
> +#define APDS9960_REG_ATIME 0x81
> +#define APDS9960_REG_WTIME 0x83
> +
> +#define APDS9960_REG_AILTL 0x84
> +#define APDS9960_REG_AILTH 0x85
> +#define APDS9960_REG_AIHTL 0x86
> +#define APDS9960_REG_AIHTH 0x87
> +
> +#define APDS9960_REG_PILT 0x89
> +#define APDS9960_REG_PIHT 0x8b
> +#define APDS9960_REG_PERS 0x8c
> +
> +#define APDS9960_REG_CONFIG_1 0x8d
> +#define APDS9960_REG_PPULSE 0x8e
> +
> +#define APDS9960_REG_CONTROL 0x8f
> +#define APDS9960_REG_CONTROL_AGAIN_MASK 0x03
> +#define APDS9960_REG_CONTROL_PGAIN_MASK 0x0c
> +#define APDS9960_REG_CONTROL_AGAIN_MASK_SHIFT 0
> +#define APDS9960_REG_CONTROL_PGAIN_MASK_SHIFT 2
> +
> +#define APDS9960_REG_CONFIG_2 0x90
> +#define APDS9960_REG_CONFIG_2_GGAIN_MASK 0x60
> +#define APDS9960_REG_CONFIG_2_GGAIN_MASK_SHIFT 5
> +
> +#define APDS9960_REG_ID 0x92
> +
> +#define APDS9960_REG_STATUS 0x93
> +#define APDS9960_REG_STATUS_PS_INT BIT(5)
> +#define APDS9960_REG_STATUS_ALS_INT BIT(4)
> +#define APDS9960_REG_STATUS_GINT BIT(2)
> +
> +#define APDS9960_REG_PDATA 0x9c
> +#define APDS9960_REG_POFFSET_UR 0x9d
> +#define APDS9960_REG_POFFSET_DL 0x9e
> +#define APDS9960_REG_CONFIG_3 0x9f
> +
> +#define APDS9960_REG_GPENTH 0xa0
> +#define APDS9960_REG_GEXTH 0xa1
> +
> +#define APDS9960_REG_GCONF_1 0xa2
> +#define APDS9960_REG_GCONF_1_GFIFO_THRES_MASK 0xc0
> +#define APDS9960_REG_GCONF_1_GFIFO_THRES_MASK_SHIFT 6
> +
> +#define APDS9960_REG_GCONF_2 0xa3
> +#define APDS9960_REG_GOFFSET_U 0xa4
> +#define APDS9960_REG_GOFFSET_D 0xa5
> +#define APDS9960_REG_GPULSE 0xa6
> +#define APDS9960_REG_GOFFSET_L 0xa7
> +#define APDS9960_REG_GOFFSET_R 0xa9
> +#define APDS9960_REG_GCONF_3 0xaa
> +
> +#define APDS9960_REG_GCONF_4 0xab
> +#define APDS9960_REG_GFLVL 0xae
> +#define APDS9960_REG_GSTATUS 0xaf
> +
> +#define APDS9960_REG_IFORCE 0xe4
> +#define APDS9960_REG_PICLEAR 0xe5
> +#define APDS9960_REG_CICLEAR 0xe6
> +#define APDS9960_REG_AICLEAR 0xe7
> +
> +#define APDS9960_DEFAULT_PERS 0x33
> +#define APDS9960_DEFAULT_GPENTH 0x50
> +#define APDS9960_DEFAULT_GEXTH 0x40
> +
> +#define APDS9960_MAX_PXS_THRES_VAL 255
> +#define APDS9960_MAX_ALS_THRES_VAL 0xffff
> +#define APDS9960_MAX_INT_TIME_IN_US 1000000
> +
> +enum apds9960_als_channel_idx {
> + IDX_ALS_CLEAR, IDX_ALS_RED, IDX_ALS_GREEN, IDX_ALS_BLUE,
> +};
> +
> +#define APDS9960_REG_ALS_BASE 0x94
> +#define APDS9960_REG_ALS_CHANNEL(_colour) \
> + (APDS9960_REG_ALS_BASE + (IDX_ALS_##_colour * 2))
> +
> +enum apds9960_gesture_channel_idx {
> + IDX_DIR_UP, IDX_DIR_DOWN, IDX_DIR_LEFT, IDX_DIR_RIGHT,
> +};
> +
> +#define APDS9960_REG_GFIFO_BASE 0xfc
> +#define APDS9960_REG_GFIFO_DIR(_dir) \
> + (APDS9960_REG_GFIFO_BASE + IDX_DIR_##_dir)
> +
> +struct apds9960_data {
> + struct i2c_client *client;
> + struct iio_dev *indio_dev;
> + struct mutex lock;
> +
> + /* regmap fields */
> + struct regmap *regmap;
> + struct regmap_field *reg_int_als;
> + struct regmap_field *reg_int_ges;
> + struct regmap_field *reg_int_pxs;
> +
> + struct regmap_field *reg_enable_als;
> + struct regmap_field *reg_enable_ges;
> + struct regmap_field *reg_enable_pxs;
> +
> + /* state */
> + int als_int;
> + int pxs_int;
> + int gesture_mode_running;
> +
> + /* gain values */
> + int als_gain;
> + int pxs_gain;
> +
> + /* integration time value in us */
> + int als_adc_int_us;
> +
> + /* gesture buffer */
> + u8 buffer[4]; /* 4 8-bit channels */
> +};
> +
> +static const struct reg_default apds9960_reg_defaults[] = {
> + /* Default ALS integration time = 2.48ms */
> + { APDS9960_REG_ATIME, 0xff },
> +};
> +
> +static const struct regmap_range apds9960_volatile_ranges[] = {
> + regmap_reg_range(APDS9960_REG_STATUS,
> + APDS9960_REG_PDATA),
> + regmap_reg_range(APDS9960_REG_GFLVL,
> + APDS9960_REG_GSTATUS),
> + regmap_reg_range(APDS9960_REG_GFIFO_DIR(UP),
> + APDS9960_REG_GFIFO_DIR(RIGHT)),
> + regmap_reg_range(APDS9960_REG_IFORCE,
> + APDS9960_REG_AICLEAR),
> +};
> +
> +static const struct regmap_access_table apds9960_volatile_table = {
> + .yes_ranges = apds9960_volatile_ranges,
> + .n_yes_ranges = ARRAY_SIZE(apds9960_volatile_ranges),
> +};
> +
> +static const struct regmap_range apds9960_precious_ranges[] = {
> + regmap_reg_range(APDS9960_REG_RAM_START, APDS9960_REG_RAM_END),
> +};
> +
> +static const struct regmap_access_table apds9960_precious_table = {
> + .yes_ranges = apds9960_precious_ranges,
> + .n_yes_ranges = ARRAY_SIZE(apds9960_precious_ranges),
> +};
> +
> +static const struct regmap_range apds9960_readable_ranges[] = {
> + regmap_reg_range(APDS9960_REG_ENABLE,
> + APDS9960_REG_GSTATUS),
> + regmap_reg_range(APDS9960_REG_GFIFO_DIR(UP),
> + APDS9960_REG_GFIFO_DIR(RIGHT)),
> +};
> +
> +static const struct regmap_access_table apds9960_readable_table = {
> + .yes_ranges = apds9960_readable_ranges,
> + .n_yes_ranges = ARRAY_SIZE(apds9960_readable_ranges),
> +};
> +
> +static const struct regmap_range apds9960_writeable_ranges[] = {
> + regmap_reg_range(APDS9960_REG_ENABLE, APDS9960_REG_CONFIG_2),
> + regmap_reg_range(APDS9960_REG_POFFSET_UR, APDS9960_REG_GCONF_4),
> + regmap_reg_range(APDS9960_REG_IFORCE, APDS9960_REG_AICLEAR),
> +};
> +
> +static const struct regmap_access_table apds9960_writeable_table = {
> + .yes_ranges = apds9960_writeable_ranges,
> + .n_yes_ranges = ARRAY_SIZE(apds9960_writeable_ranges),
> +};
> +
> +static const struct regmap_config apds9960_regmap_config = {
> + .name = APDS9960_REGMAP_NAME,
> + .reg_bits = 8,
> + .val_bits = 8,
> + .use_single_rw = 1,
> +
> + .volatile_table = &apds9960_volatile_table,
> + .precious_table = &apds9960_precious_table,
> + .rd_table = &apds9960_readable_table,
> + .wr_table = &apds9960_writeable_table,
> +
> + .reg_defaults = apds9960_reg_defaults,
> + .num_reg_defaults = ARRAY_SIZE(apds9960_reg_defaults),
> + .max_register = APDS9960_REG_GFIFO_DIR(RIGHT),
> + .cache_type = REGCACHE_RBTREE,
> +};
> +
> +static const struct iio_event_spec apds9960_pxs_event_spec[] = {
> + {
> + .type = IIO_EV_TYPE_THRESH,
> + .dir = IIO_EV_DIR_RISING,
> + .mask_separate = BIT(IIO_EV_INFO_VALUE) |
> + BIT(IIO_EV_INFO_ENABLE),
> + },
> + {
> + .type = IIO_EV_TYPE_THRESH,
> + .dir = IIO_EV_DIR_FALLING,
> + .mask_separate = BIT(IIO_EV_INFO_VALUE) |
> + BIT(IIO_EV_INFO_ENABLE),
> + },
> +};
> +
> +static const struct iio_event_spec apds9960_als_event_spec[] = {
> + {
> + .type = IIO_EV_TYPE_THRESH,
> + .dir = IIO_EV_DIR_RISING,
> + .mask_separate = BIT(IIO_EV_INFO_VALUE) |
> + BIT(IIO_EV_INFO_ENABLE),
> + },
> + {
> + .type = IIO_EV_TYPE_THRESH,
> + .dir = IIO_EV_DIR_FALLING,
> + .mask_separate = BIT(IIO_EV_INFO_VALUE) |
> + BIT(IIO_EV_INFO_ENABLE),
> + },
> +};
> +
> +#define APDS9960_GESTURE_CHANNEL(_dir, _si) { \
> + .type = IIO_PROXIMITY, \
> + .channel = _si + 1, \
> + .scan_index = _si, \
> + .indexed = 1, \
> + .scan_type = { \
> + .sign = 'u', \
> + .realbits = 8, \
> + .storagebits = 8, \
> + }, \
> +}
> +
> +#define APDS9960_INTENSITY_CHANNEL(_colour) { \
> + .type = IIO_INTENSITY, \
> + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
> + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
> + BIT(IIO_CHAN_INFO_INT_TIME), \
> + .channel2 = IIO_MOD_LIGHT_##_colour, \
> + .address = APDS9960_REG_ALS_CHANNEL(_colour), \
> + .modified = 1, \
> + .scan_index = -1, \
> +}
> +
> +static const unsigned long apds9960_scan_masks[] = {0xf, 0};
> +
> +static const struct iio_chan_spec apds9960_channels[] = {
> + {
> + .type = IIO_PROXIMITY,
> + .address = APDS9960_REG_PDATA,
> + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
> + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
> + .channel = 0,
> + .indexed = 0,
> + .scan_index = -1,
> +
> + .event_spec = apds9960_pxs_event_spec,
> + .num_event_specs = ARRAY_SIZE(apds9960_pxs_event_spec),
> + },
> + /* Gesture Sensor */
> + APDS9960_GESTURE_CHANNEL(UP, 0),
> + APDS9960_GESTURE_CHANNEL(DOWN, 1),
> + APDS9960_GESTURE_CHANNEL(LEFT, 2),
> + APDS9960_GESTURE_CHANNEL(RIGHT, 3),
> + /* ALS */
> + {
> + .type = IIO_INTENSITY,
> + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
> + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |
> + BIT(IIO_CHAN_INFO_INT_TIME),
> + .channel2 = IIO_MOD_LIGHT_CLEAR,
> + .address = APDS9960_REG_ALS_CHANNEL(CLEAR),
> + .modified = 1,
> + .scan_index = -1,
> +
> + .event_spec = apds9960_als_event_spec,
> + .num_event_specs = ARRAY_SIZE(apds9960_als_event_spec),
> + },
> + /* RGB Sensor */
> + APDS9960_INTENSITY_CHANNEL(RED),
> + APDS9960_INTENSITY_CHANNEL(GREEN),
> + APDS9960_INTENSITY_CHANNEL(BLUE),
> +};
> +
> +/* integration time in us */
> +static const int apds9960_int_time[][2] =
> + { {28000, 246}, {100000, 219}, {200000, 182}, {700000, 0} };
> +
> +/* gain mapping */
> +static const int apds9960_pxs_gain_map[] = {1, 2, 4, 8};
> +static const int apds9960_als_gain_map[] = {1, 4, 16, 64};
> +
> +static IIO_CONST_ATTR(proximity_scale_available, "1 2 4 8");
> +static IIO_CONST_ATTR(intensity_scale_available, "1 4 16 64");
> +static IIO_CONST_ATTR_INT_TIME_AVAIL("0.028 0.1 0.2 0.7");
> +
> +static struct attribute *apds9960_attributes[] = {
> + &iio_const_attr_proximity_scale_available.dev_attr.attr,
> + &iio_const_attr_intensity_scale_available.dev_attr.attr,
> + &iio_const_attr_integration_time_available.dev_attr.attr,
> + NULL,
> +};
> +
> +static struct attribute_group apds9960_attribute_group = {
> + .attrs = apds9960_attributes,
> +};
> +
> +static const struct reg_field apds9960_reg_field_int_als =
> + REG_FIELD(APDS9960_REG_ENABLE, 4, 4);
> +
> +static const struct reg_field apds9960_reg_field_int_ges =
> + REG_FIELD(APDS9960_REG_GCONF_4, 1, 1);
> +
> +static const struct reg_field apds9960_reg_field_int_pxs =
> + REG_FIELD(APDS9960_REG_ENABLE, 5, 5);
> +
> +static const struct reg_field apds9960_reg_field_enable_als =
> + REG_FIELD(APDS9960_REG_ENABLE, 1, 1);
> +
> +static const struct reg_field apds9960_reg_field_enable_ges =
> + REG_FIELD(APDS9960_REG_ENABLE, 6, 6);
> +
> +static const struct reg_field apds9960_reg_field_enable_pxs =
> + REG_FIELD(APDS9960_REG_ENABLE, 2, 2);
> +
> +static int apds9960_set_it_time(struct apds9960_data *data, int val2)
> +{
> + int ret = -EINVAL;
> + int idx;
> +
> + for (idx = 0; idx < ARRAY_SIZE(apds9960_int_time); idx++) {
> + if (apds9960_int_time[idx][0] == val2) {
> + mutex_lock(&data->lock);
> + ret = regmap_write(data->regmap, APDS9960_REG_ATIME,
> + apds9960_int_time[idx][1]);
> + if (!ret)
> + data->als_adc_int_us = val2;
> + mutex_unlock(&data->lock);
> + break;
> + }
> + }
> +
> + return ret;
> +}
> +
> +static int apds9960_set_pxs_gain(struct apds9960_data *data, int val)
> +{
> + int ret = -EINVAL;
> + int idx;
> +
> + for (idx = 0; idx < ARRAY_SIZE(apds9960_pxs_gain_map); idx++) {
> + if (apds9960_pxs_gain_map[idx] == val) {
> + /* pxs + gesture gains are mirrored */
> + mutex_lock(&data->lock);
> + ret = regmap_update_bits(data->regmap,
> + APDS9960_REG_CONTROL,
> + APDS9960_REG_CONTROL_PGAIN_MASK,
> + idx << APDS9960_REG_CONTROL_PGAIN_MASK_SHIFT);
> + if (ret) {
> + mutex_unlock(&data->lock);
> + break;
> + }
> +
> + ret = regmap_update_bits(data->regmap,
> + APDS9960_REG_CONFIG_2,
> + APDS9960_REG_CONFIG_2_GGAIN_MASK,
> + idx << APDS9960_REG_CONFIG_2_GGAIN_MASK_SHIFT);
> + if (!ret)
> + data->pxs_gain = idx;
> + mutex_unlock(&data->lock);
> + break;
> + }
> + }
> +
> + return ret;
> +}
> +
> +static int apds9960_set_als_gain(struct apds9960_data *data, int val)
> +{
> + int ret = -EINVAL;
> + int idx;
> +
> + for (idx = 0; idx < ARRAY_SIZE(apds9960_als_gain_map); idx++) {
> + if (apds9960_als_gain_map[idx] == val) {
> + mutex_lock(&data->lock);
> + ret = regmap_update_bits(data->regmap,
> + APDS9960_REG_CONTROL,
> + APDS9960_REG_CONTROL_AGAIN_MASK, idx);
> + if (!ret)
> + data->als_gain = idx;
> + mutex_unlock(&data->lock);
> + break;
> + }
> + }
> +
> + return ret;
> +}
> +
> +#ifdef CONFIG_PM
> +static int apds9960_set_power_state(struct apds9960_data *data, bool on)
> +{
> + struct device *dev = &data->client->dev;
> + int ret = 0;
> +
> + mutex_lock(&data->lock);
> +
> + if (on) {
> + int suspended;
> +
> + suspended = pm_runtime_suspended(dev);
> + ret = pm_runtime_get_sync(dev);
> +
> + /* Allow one integration cycle before allowing a reading */
> + if (suspended)
> + usleep_range(data->als_adc_int_us,
> + APDS9960_MAX_INT_TIME_IN_US);
> + } else {
> + ret = pm_runtime_put_autosuspend(dev);
> + }
> +
> + mutex_unlock(&data->lock);
> +
> + return ret;
> +}
> +#else
> +static int apds9960_set_power_state(struct apds9960_data *data, bool on)
> +{
> + return 0;
> +}
> +#endif
> +
> +static int apds9960_read_raw(struct iio_dev *indio_dev,
> + struct iio_chan_spec const *chan,
> + int *val, int *val2, long mask)
> +{
> + struct apds9960_data *data = iio_priv(indio_dev);
> + u16 buf;
> + int ret = -EINVAL;
> +
> + if (data->gesture_mode_running)
> + return -EBUSY;
> +
> + switch (mask) {
> + case IIO_CHAN_INFO_RAW:
> + apds9960_set_power_state(data, true);
> + switch (chan->type) {
> + case IIO_PROXIMITY:
> + ret = regmap_read(data->regmap, chan->address, val);
> + if (!ret)
> + ret = IIO_VAL_INT;
> + break;
> + case IIO_INTENSITY:
> + ret = regmap_bulk_read(data->regmap, chan->address,
> + &buf, 2);
> + if (!ret)
> + ret = IIO_VAL_INT;
> + *val = le16_to_cpu(buf);
> + break;
> + default:
> + ret = -EINVAL;
> + }
> + apds9960_set_power_state(data, false);
> + break;
> + case IIO_CHAN_INFO_INT_TIME:
> + /* RGB + ALS sensors only have integration time */
> + mutex_lock(&data->lock);
> + switch (chan->type) {
> + case IIO_INTENSITY:
> + *val = 0;
> + *val2 = data->als_adc_int_us;
> + ret = IIO_VAL_INT_PLUS_MICRO;
> + break;
> + default:
> + ret = -EINVAL;
> + }
> + mutex_unlock(&data->lock);
> + break;
> + case IIO_CHAN_INFO_SCALE:
> + mutex_lock(&data->lock);
> + switch (chan->type) {
> + case IIO_PROXIMITY:
> + *val = apds9960_pxs_gain_map[data->pxs_gain];
> + ret = IIO_VAL_INT;
> + break;
> + case IIO_INTENSITY:
> + *val = apds9960_als_gain_map[data->als_gain];
> + ret = IIO_VAL_INT;
> + break;
> + default:
> + ret = -EINVAL;
> + }
> + mutex_unlock(&data->lock);
> + break;
> + }
> +
> + return ret;
> +};
> +
> +static int apds9960_write_raw(struct iio_dev *indio_dev,
> + struct iio_chan_spec const *chan,
> + int val, int val2, long mask)
> +{
> + struct apds9960_data *data = iio_priv(indio_dev);
> +
> + switch (mask) {
> + case IIO_CHAN_INFO_INT_TIME:
> + /* RGB + ALS sensors only have int time */
> + switch (chan->type) {
> + case IIO_INTENSITY:
> + if (val != 0)
> + return -EINVAL;
> + return apds9960_set_it_time(data, val2);
> + default:
> + return -EINVAL;
> + }
> + case IIO_CHAN_INFO_SCALE:
> + if (val2 != 0)
> + return -EINVAL;
> + switch (chan->type) {
> + case IIO_PROXIMITY:
> + return apds9960_set_pxs_gain(data, val);
> + case IIO_INTENSITY:
> + return apds9960_set_als_gain(data, val);
> + default:
> + return -EINVAL;
> + }
> + default:
> + return -EINVAL;
> + };
> +
> + return 0;
> +}
> +
> +static inline int apds9960_get_thres_reg(const struct iio_chan_spec *chan,
> + enum iio_event_direction dir,
> + u8 *reg)
> +{
> + switch (dir) {
> + case IIO_EV_DIR_RISING:
> + switch (chan->type) {
> + case IIO_PROXIMITY:
> + *reg = APDS9960_REG_PIHT;
> + break;
> + case IIO_INTENSITY:
> + *reg = APDS9960_REG_AIHTL;
> + break;
> + default:
> + return -EINVAL;
> + }
> + break;
> + case IIO_EV_DIR_FALLING:
> + switch (chan->type) {
> + case IIO_PROXIMITY:
> + *reg = APDS9960_REG_PILT;
> + break;
> + case IIO_INTENSITY:
> + *reg = APDS9960_REG_AILTL;
> + break;
> + default:
> + return -EINVAL;
> + }
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int apds9960_read_event(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)
> +{
> + u8 reg;
> + u16 buf;
> + int ret = 0;
> + struct apds9960_data *data = iio_priv(indio_dev);
> +
> + if (info != IIO_EV_INFO_VALUE)
> + return -EINVAL;
> +
> + ret = apds9960_get_thres_reg(chan, dir, ®);
> + if (ret < 0)
> + return ret;
> +
> + if (chan->type == IIO_PROXIMITY) {
> + ret = regmap_read(data->regmap, reg, val);
> + if (ret < 0)
> + return ret;
> + } else if (chan->type == IIO_INTENSITY) {
> + ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
> + if (ret < 0)
> + return ret;
> + *val = le16_to_cpu(buf);
> + } else
> + return -EINVAL;
> +
> + *val2 = 0;
> +
> + return IIO_VAL_INT;
> +}
> +
> +static int apds9960_write_event(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)
> +{
> + u8 reg;
> + u16 buf;
> + int ret = 0;
> + struct apds9960_data *data = iio_priv(indio_dev);
> +
> + if (info != IIO_EV_INFO_VALUE)
> + return -EINVAL;
> +
> + ret = apds9960_get_thres_reg(chan, dir, ®);
> + if (ret < 0)
> + return ret;
> +
> + if (chan->type == IIO_PROXIMITY) {
> + if (val < 0 || val > APDS9960_MAX_PXS_THRES_VAL)
> + return -EINVAL;
> + ret = regmap_write(data->regmap, reg, val);
> + if (ret < 0)
> + return ret;
> + } else if (chan->type == IIO_INTENSITY) {
> + if (val < 0 || val > APDS9960_MAX_ALS_THRES_VAL)
> + return -EINVAL;
> + buf = cpu_to_le16(val);
> + ret = regmap_bulk_write(data->regmap, reg, &buf, 2);
> + if (ret < 0)
> + return ret;
> + } else
> + return -EINVAL;
> +
> + return 0;
> +}
> +
> +static int apds9960_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 apds9960_data *data = iio_priv(indio_dev);
> +
> + switch (chan->type) {
> + case IIO_PROXIMITY:
> + return data->pxs_int;
> + case IIO_INTENSITY:
> + return data->als_int;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int apds9960_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 apds9960_data *data = iio_priv(indio_dev);
> + int ret;
> +
> + state = !!state;
> +
> + switch (chan->type) {
> + case IIO_PROXIMITY:
> + if (data->pxs_int == state)
> + return -EINVAL;
> +
> + ret = regmap_field_write(data->reg_int_pxs, state);
> + if (ret)
> + return ret;
> + data->pxs_int = state;
> + apds9960_set_power_state(data, state);
> + break;
> + case IIO_INTENSITY:
> + if (data->als_int == state)
> + return -EINVAL;
> +
> + ret = regmap_field_write(data->reg_int_als, state);
> + if (ret)
> + return ret;
> + data->als_int = state;
> + apds9960_set_power_state(data, state);
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static const struct iio_info apds9960_info = {
> + .driver_module = THIS_MODULE,
> + .attrs = &apds9960_attribute_group,
> + .read_raw = apds9960_read_raw,
> + .write_raw = apds9960_write_raw,
> + .read_event_value = apds9960_read_event,
> + .write_event_value = apds9960_write_event,
> + .read_event_config = apds9960_read_event_config,
> + .write_event_config = apds9960_write_event_config,
> +
> +};
> +
> +static inline int apds9660_fifo_is_empty(struct apds9960_data *data)
> +{
> + int cnt;
> + int ret;
> +
> + ret = regmap_read(data->regmap, APDS9960_REG_GFLVL, &cnt);
> + if (ret)
> + return ret;
> +
> + return cnt;
> +}
> +
> +static void apds9960_read_gesture_fifo(struct apds9960_data *data)
> +{
> + int ret, cnt = 0;
> +
> + mutex_lock(&data->lock);
> + data->gesture_mode_running = 1;
> +
> + while (cnt-- || (cnt = apds9660_fifo_is_empty(data) > 0)) {
> + ret = regmap_bulk_read(data->regmap, APDS9960_REG_GFIFO_BASE,
> + &data->buffer, 4);
> +
> + if (ret)
> + goto err_read;
> +
> + iio_push_to_buffers(data->indio_dev, data->buffer);
> + }
> +
> +err_read:
> + data->gesture_mode_running = 0;
> + mutex_unlock(&data->lock);
> +}
> +
> +static irqreturn_t apds9960_interrupt_handler(int irq, void *private)
> +{
> + struct iio_dev *indio_dev = private;
> + struct apds9960_data *data = iio_priv(indio_dev);
> + int ret, status;
> +
> + ret = regmap_read(data->regmap, APDS9960_REG_STATUS, &status);
> + if (ret < 0) {
> + dev_err(&data->client->dev, "irq status reg read failed\n");
> + return IRQ_HANDLED;
> + }
> +
> + if ((status & APDS9960_REG_STATUS_ALS_INT) && data->als_int) {
> + iio_push_event(indio_dev,
> + IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0,
> + IIO_EV_TYPE_THRESH,
> + IIO_EV_DIR_EITHER),
> + iio_get_time_ns());
> + regmap_write(data->regmap, APDS9960_REG_CICLEAR, 1);
> + }
> +
> + if ((status & APDS9960_REG_STATUS_PS_INT) && data->pxs_int) {
> + iio_push_event(indio_dev,
> + IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 0,
> + IIO_EV_TYPE_THRESH,
> + IIO_EV_DIR_EITHER),
> + iio_get_time_ns());
> + regmap_write(data->regmap, APDS9960_REG_PICLEAR, 1);
> + }
> +
> + if (status & APDS9960_REG_STATUS_GINT)
> + apds9960_read_gesture_fifo(data);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int apds9960_set_powermode(struct apds9960_data *data, bool state)
> +{
> + return regmap_update_bits(data->regmap, APDS9960_REG_ENABLE, 1, state);
> +}
> +
> +static int apds9960_buffer_postenable(struct iio_dev *indio_dev)
> +{
> + struct apds9960_data *data = iio_priv(indio_dev);
> + int ret;
> +
> + ret = regmap_field_write(data->reg_int_ges, 1);
> + if (ret)
> + return ret;
> +
> + ret = regmap_field_write(data->reg_enable_ges, 1);
> + if (ret)
> + return ret;
> +
> + pm_runtime_get_sync(&data->client->dev);
> +
> + return 0;
> +}
> +
> +static int apds9960_buffer_predisable(struct iio_dev *indio_dev)
> +{
> + struct apds9960_data *data = iio_priv(indio_dev);
> + int ret;
> +
> + ret = regmap_field_write(data->reg_enable_ges, 0);
> + if (ret)
> + return ret;
> +
> + ret = regmap_field_write(data->reg_int_ges, 0);
> + if (ret)
> + return ret;
> +
> + pm_runtime_put_autosuspend(&data->client->dev);
> +
> + return 0;
> +}
> +
> +static const struct iio_buffer_setup_ops apds9960_buffer_setup_ops = {
> + .postenable = apds9960_buffer_postenable,
> + .predisable = apds9960_buffer_predisable,
> +};
> +
> +static int apds9960_regfield_init(struct apds9960_data *data)
> +{
> + struct device *dev = &data->client->dev;
> + struct regmap *regmap = data->regmap;
> +
> + data->reg_int_als = devm_regmap_field_alloc(dev, regmap,
> + apds9960_reg_field_int_als);
> + if (IS_ERR(data->reg_int_als)) {
> + dev_err(dev, "INT ALS reg field init failed\n");
> + return PTR_ERR(data->reg_int_als);
> + }
> +
> + data->reg_int_ges = devm_regmap_field_alloc(dev, regmap,
> + apds9960_reg_field_int_ges);
> + if (IS_ERR(data->reg_int_ges)) {
> + dev_err(dev, "INT gesture reg field init failed\n");
> + return PTR_ERR(data->reg_int_ges);
> + }
> +
> + data->reg_int_pxs = devm_regmap_field_alloc(dev, regmap,
> + apds9960_reg_field_int_pxs);
> + if (IS_ERR(data->reg_int_pxs)) {
> + dev_err(dev, "INT pxs reg field init failed\n");
> + return PTR_ERR(data->reg_int_pxs);
> + }
> +
> + data->reg_enable_als = devm_regmap_field_alloc(dev, regmap,
> + apds9960_reg_field_enable_als);
> + if (IS_ERR(data->reg_enable_als)) {
> + dev_err(dev, "Enable ALS reg field init failed\n");
> + return PTR_ERR(data->reg_enable_als);
> + }
> +
> + data->reg_enable_ges = devm_regmap_field_alloc(dev, regmap,
> + apds9960_reg_field_enable_ges);
> + if (IS_ERR(data->reg_enable_ges)) {
> + dev_err(dev, "Enable gesture reg field init failed\n");
> + return PTR_ERR(data->reg_enable_ges);
> + }
> +
> + data->reg_enable_pxs = devm_regmap_field_alloc(dev, regmap,
> + apds9960_reg_field_enable_pxs);
> + if (IS_ERR(data->reg_enable_pxs)) {
> + dev_err(dev, "Enable PXS reg field init failed\n");
> + return PTR_ERR(data->reg_enable_pxs);
> + }
> +
> + return 0;
> +}
> +
> +static int apds9960_chip_init(struct apds9960_data *data)
> +{
> + int ret;
> +
> + /* Default IT for ALS of 28 ms */
> + ret = apds9960_set_it_time(data, 28000);
> + if (ret)
> + return ret;
> +
> + /* Ensure gesture interrupt is OFF */
> + ret = regmap_field_write(data->reg_int_ges, 0);
> + if (ret)
> + return ret;
> +
> + /* Disable gesture sensor, since polling is useless from user-space */
> + ret = regmap_field_write(data->reg_enable_ges, 0);
> + if (ret)
> + return ret;
> +
> + /* Ensure proximity interrupt is OFF */
> + ret = regmap_field_write(data->reg_int_pxs, 0);
> + if (ret)
> + return ret;
> +
> + /* Enable proximity sensor for polling */
> + ret = regmap_field_write(data->reg_enable_pxs, 1);
> + if (ret)
> + return ret;
> +
> + /* Ensure ALS interrupt is OFF */
> + ret = regmap_field_write(data->reg_int_als, 0);
> + if (ret)
> + return ret;
> +
> + /* Enable ALS sensor for polling */
> + ret = regmap_field_write(data->reg_enable_als, 1);
> + if (ret)
> + return ret;
> + /*
> + * When enabled trigger an interrupt after 3 readings
> + * outside threshold for ALS + PXS
> + */
> + ret = regmap_write(data->regmap, APDS9960_REG_PERS,
> + APDS9960_DEFAULT_PERS);
> + if (ret)
> + return ret;
> +
> + /*
> + * Wait for 4 event outside gesture threshold to prevent interrupt
> + * flooding.
> + */
> + ret = regmap_update_bits(data->regmap, APDS9960_REG_GCONF_1,
> + APDS9960_REG_GCONF_1_GFIFO_THRES_MASK,
> + BIT(0) << APDS9960_REG_GCONF_1_GFIFO_THRES_MASK_SHIFT);
> + if (ret)
> + return ret;
> +
> + /* Default ENTER and EXIT thresholds for the GESTURE engine. */
> + ret = regmap_write(data->regmap, APDS9960_REG_GPENTH,
> + APDS9960_DEFAULT_GPENTH);
> + if (ret)
> + return ret;
> +
> + ret = regmap_write(data->regmap, APDS9960_REG_GEXTH,
> + APDS9960_DEFAULT_GEXTH);
> + if (ret)
> + return ret;
> +
> + ret = apds9960_set_powermode(data, 1);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int apds9960_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct apds9960_data *data;
> + struct iio_buffer *buffer;
> + struct iio_dev *indio_dev;
> + int ret;
> +
> + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
> + if (!indio_dev)
> + return -ENOMEM;
> +
> + buffer = devm_iio_kfifo_allocate(&client->dev);
> + if (!buffer)
> + return -ENOMEM;
> +
> + iio_device_attach_buffer(indio_dev, buffer);
> +
> + indio_dev->info = &apds9960_info;
> + indio_dev->name = APDS9960_DRV_NAME;
> + indio_dev->channels = apds9960_channels;
> + indio_dev->num_channels = ARRAY_SIZE(apds9960_channels);
> + indio_dev->available_scan_masks = apds9960_scan_masks;
> + indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
> + indio_dev->setup_ops = &apds9960_buffer_setup_ops;
> +
> + data = iio_priv(indio_dev);
> + i2c_set_clientdata(client, indio_dev);
> +
> + data->regmap = devm_regmap_init_i2c(client, &apds9960_regmap_config);
> + if (IS_ERR(data->regmap)) {
> + dev_err(&client->dev, "regmap initialization failed.\n");
> + return PTR_ERR(data->regmap);
> + }
> +
> + data->client = client;
> + data->indio_dev = indio_dev;
> + mutex_init(&data->lock);
> +
> + ret = pm_runtime_set_active(&client->dev);
> + if (ret)
> + goto error_power_down;
> +
> + pm_runtime_enable(&client->dev);
> + pm_runtime_set_autosuspend_delay(&client->dev, 5000);
> + pm_runtime_use_autosuspend(&client->dev);
> +
> + apds9960_set_power_state(data, true);
> +
> + ret = apds9960_regfield_init(data);
> + if (ret)
> + goto error_power_down;
> +
> + ret = apds9960_chip_init(data);
> + if (ret)
> + goto error_power_down;
> +
> + if (client->irq <= 0) {
> + dev_err(&client->dev, "no valid irq defined\n");
> + ret = -EINVAL;
> + goto error_power_down;
> + }
> + ret = devm_request_threaded_irq(&client->dev, client->irq,
> + NULL, apds9960_interrupt_handler,
> + IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
> + "apds9960_event",
> + indio_dev);
> + if (ret) {
> + dev_err(&client->dev, "request irq (%d) failed\n", client->irq);
> + goto error_power_down;
> + }
> +
> + ret = iio_device_register(indio_dev);
> + if (ret)
> + goto error_power_down;
> +
> + apds9960_set_power_state(data, false);
> +
> + return 0;
> +
> +error_power_down:
> + apds9960_set_power_state(data, false);
> +
> + return ret;
> +}
> +
> +static int apds9960_remove(struct i2c_client *client)
> +{
> + struct iio_dev *indio_dev = i2c_get_clientdata(client);
> + struct apds9960_data *data = iio_priv(indio_dev);
> +
> + iio_device_unregister(indio_dev);
> + pm_runtime_disable(&client->dev);
> + pm_runtime_set_suspended(&client->dev);
> + apds9960_set_powermode(data, 0);
> +
> + return 0;
> +}
> +
> +#ifdef CONFIG_PM
> +static int apds9960_runtime_suspend(struct device *dev)
> +{
> + struct apds9960_data *data =
> + iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
> +
> + return apds9960_set_powermode(data, 0);
> +}
> +
> +static int apds9960_runtime_resume(struct device *dev)
> +{
> + struct apds9960_data *data =
> + iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
> +
> + return apds9960_set_powermode(data, 1);
> +}
> +#endif
> +
> +static const struct dev_pm_ops apds9960_pm_ops = {
> + SET_RUNTIME_PM_OPS(apds9960_runtime_suspend,
> + apds9960_runtime_resume, NULL)
> +};
> +
> +static const struct i2c_device_id apds9960_id[] = {
> + { "apds9960", 0 },
> + {}
> +};
> +MODULE_DEVICE_TABLE(i2c, apds9960_id);
> +
> +static struct i2c_driver apds9960_driver = {
> + .driver = {
> + .name = APDS9960_DRV_NAME,
> + .pm = &apds9960_pm_ops,
> + .owner = THIS_MODULE,
> + },
> + .probe = apds9960_probe,
> + .remove = apds9960_remove,
> + .id_table = apds9960_id,
> +};
> +module_i2c_driver(apds9960_driver);
> +
> +MODULE_AUTHOR("Matt Ranostay <mranostay@xxxxxxxxx>");
> +MODULE_DESCRIPTION("ADPS9960 Gesture/RGB/ALS/Proximity sensor");
> +MODULE_LICENSE("GPL");
>
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