extreme nitpicking mode on :)
> APDS9960 is a combination ALS, proximity, and gesture sensor.
combination of
> This patch adds support for these functions along with gain control,
> integration time, and event thresholds.
some comments below...
> Signed-off-by: Matt Ranostay <mranostay@xxxxxxxxx>
> ---
> .../ABI/testing/sysfs-bus-iio-light-apds9960 | 125 ++
> drivers/iio/light/Kconfig | 12 +
> drivers/iio/light/Makefile | 1 +
> drivers/iio/light/apds9960.c | 1219 ++++++++++++++++++++
> 4 files changed, 1357 insertions(+)
> create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-light-apds9960
> create mode 100644 drivers/iio/light/apds9960.c
>
> diff --git a/Documentation/ABI/testing/sysfs-bus-iio-light-apds9960 b/Documentation/ABI/testing/sysfs-bus-iio-light-apds9960
> new file mode 100644
> index 0000000..1a16732
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-bus-iio-light-apds9960
> @@ -0,0 +1,125 @@
> +What: /sys/bus/iio/devices/triggerX/name = "apds9960-gestureX"
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + The APDS9960 kernel module provides an trigger, which sets the
a trigger
> + driver in a mode, which gesture data is pushed to the buffer
> + when it becomes available.
grammar violation, maybe
"... which sets the driver in a mode such that gesture..."
> +
> +What /sys/bus/iio/devices/iio:deviceX/in_proximity0_raw
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Get the current proximity value from 0-255.
this is standard behaviour, why document separately?
there is no way to express the expected limits a measurement to userspace
(this could be added I guess)
> +
> +What /sys/bus/iio/devices/iio:deviceX/in_proximity1_raw
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Get the current UP photodiode proximity value from 0-255.
> + Access is disabled to prevent the side effect of
> + userspace clearing the hardware FIFO.
the description is not very helpful; not sure if up/down/left is very
helpful
> +
> +What /sys/bus/iio/devices/iio:deviceX/in_proximity2_raw
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Get the current DOWN photodiode proximity value from 0-255.
> + Access is disabled to prevent the side effect of
> + userspace clearing the hardware FIFO.
> +
> +What /sys/bus/iio/devices/iio:deviceX/in_proximity3_raw
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Get the current LEFT photodiode proximity value from 0-255.
> + Access is disabled to prevent the side effect of
> + userspace clearing the hardware FIFO.
> +
> +What /sys/bus/iio/devices/iio:deviceX/in_proximity4_raw
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Get the current RIGHT photodiode proximity value from 0-255.
> + Access is disabled to prevent the side effect of
> + userspace clearing the hardware FIFO.
> +
> +What /sys/bus/iio/devices/iio:deviceX/in_intensity_clear_raw
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Get the current unprocessed lux value for the clear/ALS
> + photodiode.
if it's lux it should be 'illuminance'?
> +
> +What /sys/bus/iio/devices/iio:deviceX/in_intensity_red_raw
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Get the current unprocessed lux value for the red photodiode.
is lux defined for red light?
> +
> +What /sys/bus/iio/devices/iio:deviceX/in_intensity_green_raw
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Get the current unprocessed lux value for the green photodiode.
> +
> +What /sys/bus/iio/devices/iio:deviceX/in_intensity_blue_raw
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Get the current unprocessed lux value for the blue photodiode.
> +
> +What /sys/bus/iio/devices/iio:deviceX/integration_time_available
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Provide allowed integration time values in fractions of a second
> + for the ALS + RGB sensor engines.
> +
> +What /sys/bus/iio/devices/iio:deviceX/in_intensity_integration_time
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Set integration time in fractions of a second for the ALS + RGB
> + sensor engines.
> +
> +What /sys/bus/iio/devices/iio:deviceX/in_proximity_calibscale_available
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Provide the allowed gain values for the proximity + gesture
> + engines.
I think _scale should be used to adjust the gain; there is nothing
adps9660 specific here
> +
> +What /sys/bus/iio/devices/iio:deviceX/in_proximity_calibscale
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Set the gain value for the proximity + gesture engines.
> +
> +What /sys/bus/iio/devices/iio:deviceX/in_intensity_calibscale_available
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Provide the allowed gain values for the ALS + RGB sensor
> + engines.
> +
> +What /sys/bus/iio/devices/iio:deviceX/in_intensity_calibscale
> +Date: July 2015
> +KernelVersion: 4.2
> +Contact: Matt Ranostay <mranostay@xxxxxxxxx>
> +Description:
> + Set the gain value for the ALS + RGB sensor engines.
> diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
> index e6198b7..6a4a47c7 100644
> --- a/drivers/iio/light/Kconfig
> +++ b/drivers/iio/light/Kconfig
> @@ -50,6 +50,18 @@ 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 IIO_BUFFER
> + select IIO_TRIGGERED_BUFFER
> + 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 e2d50fd..0189ac7 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..00e3442
> --- /dev/null
> +++ b/drivers/iio/light/apds9960.c
> @@ -0,0 +1,1219 @@
> +/*
> + * 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/sysfs.h>
> +#include <linux/iio/trigger.h>
> +#include <linux/iio/trigger_consumer.h>
> +#include <linux/iio/triggered_buffer.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_ENABLE_PON BIT(0)
> +
> +#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_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_trigger *trig;
> + 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;
> +
> + /* gain values */
> + int als_gain;
> + int pxs_gain;
> +
> + /* int value in us */
integration time value
> + int als_adc_int_us;
> +
> + /* gesture buffer */
> + u8 buffer[8]; /* 4 8-bit channels + 64-bit timestamp */
nonono; this is 8 bytes, the timestamp along has 8 bytes!
> +};
> +
> +static const struct reg_default apds9960_reg_defaults[] = {
> + { APDS9960_REG_ATIME, 0xff },
> + { APDS9960_REG_WTIME, 0xff },
> + { APDS9960_REG_CONFIG_1, 0x40 },
> + { APDS9960_REG_CONFIG_2, 0x01 },
> + { APDS9960_REG_PPULSE, 0x40 },
> + { APDS9960_REG_GPULSE, 0x40 },
> +};
> +
> +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),
> + },
> +
drop extra line
> +};
> +
> +#define APDS9960_GESTURE_CHANNEL(_dir, _si) { \
> + .type = IIO_PROXIMITY, \
> + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
> + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBSCALE), \
> + .address = APDS9960_REG_GFIFO_DIR(_dir), \
> + .channel = _si + 1, \
> + .channel2 = IIO_MOD_LIGHT_IR, \
this would result in proximity_ir sysfs entries? -> not documented?
> + .scan_index = _si, \
> + .indexed = 1, \
> + .scan_type = { \
> + .sign = 'u', \
> + .realbits = 8, \
> + .storagebits = 8, \
> + .endianness = IIO_CPU, \
endianness is pointless for a byte
> + }, \
> +}
> +
> +#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_CALIBSCALE) | \
> + BIT(IIO_CHAN_INFO_INT_TIME), \
> + .channel2 = IIO_MOD_LIGHT_##_colour, \
> + .address = APDS9960_REG_ALS_CHANNEL(_colour), \
> + .modified = 1, \
> + .scan_index = -1, \
> + .scan_type = { \
> + .sign = 'u', \
> + .realbits = 16, \
> + .storagebits = 16, \
> + .endianness = IIO_CPU,\
> + }, \
> +}
> +
> +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_CALIBSCALE),
> + .channel = 0,
> + .channel2 = IIO_MOD_LIGHT_IR,
> +
> + .indexed = 1,
> + .scan_index = -1,
> + .scan_type = {
> + .sign = 'u',
> + .realbits = 8,
> + .storagebits = 8,
> + .endianness = IIO_CPU,
> + },
> + .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),
> + IIO_CHAN_SOFT_TIMESTAMP(4),
> + /* ALS */
> + {
> + .type = IIO_INTENSITY,
> + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
> + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBSCALE) |
> + 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} };
the 2nd array element is the register value to be set? maybe in hex to
make that more clear?
> +
> +/* 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(in_proximity_calibscale_available, "1 2 4 8");
> +static IIO_CONST_ATTR(in_intensity_calibscale_available, "1 4 16 64");
> +static IIO_CONST_ATTR_INT_TIME_AVAIL("0.028 0.1 0.2 0.7");
_scale
> +
> +static struct attribute *apds9960_attributes[] = {
> + &iio_const_attr_in_proximity_calibscale_available.dev_attr.attr,
> + &iio_const_attr_in_intensity_calibscale_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 reg_field_int_als =
> + REG_FIELD(APDS9960_REG_ENABLE, 4, 4);
> +
> +static const struct reg_field reg_field_int_ges =
> + REG_FIELD(APDS9960_REG_GCONF_4, 1, 1);
> +
> +static const struct reg_field reg_field_int_pxs =
> + REG_FIELD(APDS9960_REG_ENABLE, 5, 5);
> +
> +static const struct reg_field reg_field_enable_als =
> + REG_FIELD(APDS9960_REG_ENABLE, 1, 1);
> +
> +static const struct reg_field reg_field_enable_ges =
> + REG_FIELD(APDS9960_REG_ENABLE, 6, 6);
> +
> +static const struct reg_field 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;
> +
> + mutex_lock(&data->lock);
what does the mutex protect; I think the locking (if necessary) can be
done only around the regmap_write() plus update of int_us -- not around
the loop
> + for (idx = 0; idx < ARRAY_SIZE(apds9960_int_time); idx++) {
> + if (apds9960_int_time[idx][0] != val2)
> + continue;
> + ret = regmap_write(data->regmap, APDS9960_REG_ATIME,
> + apds9960_int_time[idx][1]);
> + if (ret)
> + break;
> + data->als_adc_int_us = val2;
could break here? the loop logic is a bit unusual
same for other loops
elsewhere the index is stored, here the value is remembered; inconsistent
> + }
> + mutex_unlock(&data->lock);
> +
> + return ret;
> +}
> +
> +static int apds9960_set_pxs_gain(struct apds9960_data *data, int val)
> +{
> + int ret = -EINVAL;
> + int idx;
> +
> + mutex_lock(&data->lock);
> + for (idx = 0; idx < ARRAY_SIZE(apds9960_pxs_gain_map); idx++) {
> + if (apds9960_pxs_gain_map[idx] != val)
> + continue;
> + /* pxs + gesture gains are mirrored */
> + ret = regmap_update_bits(data->regmap, APDS9960_REG_CONTROL,
> + APDS9960_REG_CONTROL_PGAIN_MASK,
> + idx << APDS9960_REG_CONTROL_PGAIN_MASK_SHIFT);
> + if (ret)
> + 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)
> + break;
> + data->pxs_gain = idx;
> + }
> + mutex_unlock(&data->lock);
> +
> + return ret;
> +}
> +
> +static int apds9960_set_als_gain(struct apds9960_data *data, int val)
> +{
> + int ret = -EINVAL;
> + int idx;
> +
> + mutex_lock(&data->lock);
> + for (idx = 0; idx < ARRAY_SIZE(apds9960_als_gain_map); idx++) {
> + if (apds9960_als_gain_map[idx] != val)
> + continue;
> + ret = regmap_update_bits(data->regmap, APDS9960_REG_CONTROL,
> + APDS9960_REG_CONTROL_AGAIN_MASK, idx);
> + if (ret)
> + break;
> + data->als_gain = idx;
> + }
> + mutex_unlock(&data->lock);
> +
> + 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 = 0;
default to -EINVAL?
> +
> + if (data->gesture_mode)
> + return -EBUSY;
can trigger-only channels be checked here already?
> +
> + switch (mask) {
> + case IIO_CHAN_INFO_RAW:
> + apds9960_set_power_state(data, true);
> + switch (chan->type) {
> + case IIO_PROXIMITY:
> + if (chan->scan_index == -1) {
> + ret = regmap_read(data->regmap,
> + chan->address, val);
> + if (!ret)
> + ret = IIO_VAL_INT;
> + } else {
> + /*
> + * Cannot poll the GESTURE channels which are
> + * just usable with triggered buffers.
> + */
> + ret = -EBUSY;
> + }
> + 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);
> + *val2 = 0;
no need to set val2 if returning IIO_VAL_INT
> + break;
> + default:
> + ret = -EINVAL;
> + }
> + apds9960_set_power_state(data, false);
> + break;
> + case IIO_CHAN_INFO_INT_TIME:
> + /* RGB + ALS sensors only have int time */
> + mutex_lock(&data->lock);
what does the mutex protect? thre read on _int_us?
> + 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_CALIBSCALE:
> + 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;
> + default:
> + return -EINVAL;
> + }
> +
> + 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_CALIBSCALE:
> + switch (chan->type) {
check for val2 == 0
> + 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 > 255)
> + return -EINVAL;
> + ret = regmap_write(data->regmap, reg, val);
> + if (ret < 0)
> + return ret;
> + } else if (chan->type == IIO_INTENSITY) {
> + if (val > 0xFFFF)
> + 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 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());
> + }
> +
> + 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());
> + }
> +
> + if (status & APDS9960_REG_STATUS_GINT)
> + iio_trigger_poll_chained(data->trig);
> +
> + regmap_write(data->regmap, APDS9960_REG_AICLEAR, 1);
> +
> + return IRQ_HANDLED;
> +}
> +
> +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 irqreturn_t apds9960_trigger_handler(int irq, void *private)
> +{
> + struct iio_poll_func *pf = private;
> + struct iio_dev *indio_dev = pf->indio_dev;
> + struct apds9960_data *data = iio_priv(indio_dev);
> + u8 buffer[4];
> + int ret;
> +
> + mutex_lock(&data->lock);
> + data->gesture_mode = 1;
> +
> + while (apds9660_fifo_is_empty(data) > 0) {
> + int i, j = 0;
> +
> + memset(&data->buffer, 0, sizeof(data->buffer));
> +
> + ret = regmap_bulk_read(data->regmap,
> + APDS9960_REG_GFIFO_BASE, &buffer, 4);
> + if (ret)
> + goto err_read;
> +
> + /*
> + * Even if we don't care about scan_index channels we need to
> + * read them to clear the FIFO.
> + */
> + for_each_set_bit(i, indio_dev->active_scan_mask,
> + indio_dev->masklength) {
> + data->buffer[j++] = buffer[i];
> + }
> + iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
> + iio_get_time_ns());
> + }
> +
> +err_read:
> + data->gesture_mode = 0;
> + mutex_unlock(&data->lock);
> + iio_trigger_notify_done(indio_dev->trig);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static const struct iio_trigger_ops iio_interrupt_trigger_ops = {
> + .owner = THIS_MODULE,
> +};
> +
> +static int apds9960_set_powermode(struct apds9960_data *data, bool state)
> +{
> + int ret;
> +
> + ret = regmap_update_bits(data->regmap, APDS9960_REG_ENABLE,
> + APDS9960_REG_ENABLE_PON, state);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int apds9960_buffer_preenable(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_postdisable(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 = {
> + .preenable = apds9960_buffer_preenable,
> + .postenable = iio_triggered_buffer_postenable,
> + .predisable = iio_triggered_buffer_predisable,
> + .postdisable = apds9960_buffer_postdisable,
> +};
> +
> +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, 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, 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, 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, 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, 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, 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 2.8 ms */
that would be 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 and 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_dev *indio_dev;
> + struct iio_trigger *trig;
> + int ret;
> +
> + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
> + if (!indio_dev)
> + return -ENOMEM;
> +
> + 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->modes = INDIO_DIRECT_MODE;
> +
> + trig = devm_iio_trigger_alloc(&client->dev, "%s-gesture%d",
> + indio_dev->name, indio_dev->id);
> + if (!trig)
> + return -ENOMEM;
> +
> + 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->trig = trig;
> + data->indio_dev = indio_dev;
> + trig->dev.parent = indio_dev->dev.parent;
> + trig->ops = &iio_interrupt_trigger_ops;
> +
> + mutex_init(&data->lock);
> + iio_trigger_set_drvdata(trig, indio_dev);
> +
> + ret = pm_runtime_set_active(&indio_dev->dev);
> + if (ret)
> + return ret;
> +
> + 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 = iio_trigger_register(trig);
> + if (ret) {
> + dev_err(&client->dev, "failed to register trigger\n");
> + return ret;
> + }
> +
> + ret = iio_triggered_buffer_setup(indio_dev, NULL,
> + apds9960_trigger_handler,
> + &apds9960_buffer_setup_ops);
> + if (ret)
> + goto error_unreg_trigger;
> +
> + ret = iio_device_register(indio_dev);
> + if (ret)
> + goto error_unreg_buffer;
> +
> + ret = apds9960_regfield_init(data);
> + if (ret)
> + goto error_unreg_buffer;
> +
> + ret = apds9960_chip_init(data);
> + if (ret)
> + goto error_unreg_buffer;
> +
> + if (client->irq > 0) {
> + 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_unreg_buffer;
> + }
> + } else {
> + dev_err(&client->dev, "no valid irq defined\n");
> + ret = -EINVAL;
> + goto error_unreg_buffer;
> + }
> +
> + apds9960_set_power_state(data, false);
> + return 0;
> +
> +error_unreg_buffer:
> + iio_triggered_buffer_cleanup(indio_dev);
> +
> +error_unreg_trigger:
> + iio_trigger_unregister(data->trig);
> + 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);
> + iio_triggered_buffer_cleanup(indio_dev);
> + iio_trigger_unregister(data->trig);
> +
> + 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");
>
--
Peter Meerwald
+43-664-2444418 (mobile)
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