[PATCH v5 2/2] iio: light: Add APDS9160 ALS & Proximity sensor driver

Mikael Gonella-Bolduc via B4 Relay
2025-01-22T22:59:41Z

From: Mikael Gonella-Bolduc <mgonellabolduc@dimonoff.com>

APDS9160 is a combination of ALS and proximity sensors.

This patch add supports for:
- Intensity clear data and illuminance data
- Proximity data
- Gain control, rate control
- Event thresholds

Signed-off-by: Mikael Gonella-Bolduc <mgonellabolduc@dimonoff.com>
---
MAINTAINERS | 7 +
drivers/iio/light/Kconfig | 11 +
drivers/iio/light/Makefile | 1 +
drivers/iio/light/apds9160.c | 1597 ++++++++++++++++++++++++++++++++++++++++++
4 files changed, 1616 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index e69d1632c382fe0e366f7bb20e72ee0c9e91e30b..23d9fcbf71a311940ff86d8dc4cabd5be77925aa 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4340,6 +4340,13 @@ F: kernel/bpf/stackmap.c
F: kernel/trace/bpf_trace.c
F: lib/buildid.c

+BROADCOM APDS9160 AMBIENT LIGHT SENSOR AND PROXIMITY DRIVER
+M: Mikael Gonella-Bolduc <m.gonella.bolduc@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/light/brcm,apds9160.yaml
+F: drivers/iio/light/apds9160.c
+
BROADCOM ASP 2.0 ETHERNET DRIVER
M: Justin Chen <justin.chen@broadcom.com>
M: Florian Fainelli <florian.fainelli@broadcom.com>
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index 29ffa84919273d64b8464ab8bbf59661b0102f97..419360661d53973eda71d7d986ff7fd481c7aa2c 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -63,6 +63,17 @@ config AL3320A
To compile this driver as a module, choose M here: the
module will be called al3320a.

+config APDS9160
+ tristate "APDS9160 combined als and proximity sensor"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Say Y here if you want to build support for a Broadcom APDS9160
+ combined ambient light and proximity sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called apds9160.
+
config APDS9300
tristate "APDS9300 ambient light sensor"
depends on I2C
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index f14a3744271242f04fe7849b47308397ac2c9939..4a22043acdbbbed2b696a3225e4024654d5d9339 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_ADJD_S311) += adjd_s311.o
obj-$(CONFIG_ADUX1020) += adux1020.o
obj-$(CONFIG_AL3010) += al3010.o
obj-$(CONFIG_AL3320A) += al3320a.o
+obj-$(CONFIG_APDS9160) += apds9160.o
obj-$(CONFIG_APDS9300) += apds9300.o
obj-$(CONFIG_APDS9306) += apds9306.o
obj-$(CONFIG_APDS9960) += apds9960.o
diff --git a/drivers/iio/light/apds9160.c b/drivers/iio/light/apds9160.c
new file mode 100644
index 0000000000000000000000000000000000000000..e98006de473790da66b92734a0527359e9cd1f40
--- /dev/null
+++ b/drivers/iio/light/apds9160.c
@@ -0,0 +1,1597 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * APDS9160 sensor driver.
+ * Chip is combined proximity and ambient light sensor.
+ * Author: 2024 Mikael Gonella-Bolduc <m.gonella.bolduc@gmail.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <linux/cleanup.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/types.h>
+#include <linux/units.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/events.h>
+#include <linux/iio/sysfs.h>
+
+#include <linux/unaligned.h>
+
+#define APDS9160_REGMAP_NAME "apds9160_regmap"
+
+/* Main control register */
+#define APDS9160_REG_CTRL 0x00
+#define APDS9160_CTRL_SWRESET BIT(4) /* 1: Activate reset */
+#define APDS9160_CTRL_MODE_RGB BIT(2) /* 0: ALS & IR, 1: RGB & IR */
+#define APDS9160_CTRL_EN_ALS BIT(1) /* 1: ALS active */
+#define APDS9160_CTLR_EN_PS BIT(0) /* 1: PS active */
+
+/* Status register */
+#define APDS9160_SR_LS_INT BIT(4)
+#define APDS9160_SR_LS_NEW_DATA BIT(3)
+#define APDS9160_SR_PS_INT BIT(1)
+#define APDS9160_SR_PS_NEW_DATA BIT(0)
+
+/* Interrupt configuration registers */
+#define APDS9160_REG_INT_CFG 0x19
+#define APDS9160_REG_INT_PST 0x1A
+#define APDS9160_INT_CFG_EN_LS BIT(2) /* LS int enable */
+#define APDS9160_INT_CFG_EN_PS BIT(0) /* PS int enable */
+
+/* Proximity registers */
+#define APDS9160_REG_PS_LED 0x01
+#define APDS9160_REG_PS_PULSES 0x02
+#define APDS9160_REG_PS_MEAS_RATE 0x03
+#define APDS9160_REG_PS_THRES_HI_LSB 0x1B
+#define APDS9160_REG_PS_THRES_HI_MSB 0x1C
+#define APDS9160_REG_PS_THRES_LO_LSB 0x1D
+#define APDS9160_REG_PS_THRES_LO_MSB 0x1E
+#define APDS9160_REG_PS_DATA_LSB 0x08
+#define APDS9160_REG_PS_DATA_MSB 0x09
+#define APDS9160_REG_PS_CAN_LEVEL_DIG_LSB 0x1F
+#define APDS9160_REG_PS_CAN_LEVEL_DIG_MSB 0x20
+#define APDS9160_REG_PS_CAN_LEVEL_ANA_DUR 0x21
+#define APDS9160_REG_PS_CAN_LEVEL_ANA_CURRENT 0x22
+
+/* Light sensor registers */
+#define APDS9160_REG_LS_MEAS_RATE 0x04
+#define APDS9160_REG_LS_GAIN 0x05
+#define APDS9160_REG_LS_DATA_CLEAR_LSB 0x0A
+#define APDS9160_REG_LS_DATA_CLEAR 0x0B
+#define APDS9160_REG_LS_DATA_CLEAR_MSB 0x0C
+#define APDS9160_REG_LS_DATA_ALS_LSB 0x0D
+#define APDS9160_REG_LS_DATA_ALS 0x0E
+#define APDS9160_REG_LS_DATA_ALS_MSB 0x0F
+#define APDS9160_REG_LS_THRES_UP_LSB 0x24
+#define APDS9160_REG_LS_THRES_UP 0x25
+#define APDS9160_REG_LS_THRES_UP_MSB 0x26
+#define APDS9160_REG_LS_THRES_LO_LSB 0x27
+#define APDS9160_REG_LS_THRES_LO 0x28
+#define APDS9160_REG_LS_THRES_LO_MSB 0x29
+#define APDS9160_REG_LS_THRES_VAR 0x2A
+
+/* Part identification number register */
+#define APDS9160_REG_ID 0x06
+
+/* Status register */
+#define APDS9160_REG_SR 0x07
+#define APDS9160_SR_DATA_ALS BIT(3)
+#define APDS9160_SR_DATA_PS BIT(0)
+
+/* Supported ID:s */
+#define APDS9160_PART_ID_0 0x03
+
+#define APDS9160_PS_THRES_MAX 0x7FF
+#define APDS9160_LS_THRES_MAX 0xFFFFF
+#define APDS9160_CMD_LS_RESOLUTION_25MS 0x04
+#define APDS9160_CMD_LS_RESOLUTION_50MS 0x03
+#define APDS9160_CMD_LS_RESOLUTION_100MS 0x02
+#define APDS9160_CMD_LS_RESOLUTION_200MS 0x01
+#define APDS9160_PS_DATA_MASK 0x7FF
+
+#define APDS9160_DEFAULT_LS_GAIN 3
+#define APDS9160_DEFAULT_LS_RATE 100
+#define APDS9160_DEFAULT_PS_RATE 100
+#define APDS9160_DEFAULT_PS_CANCELLATION_LEVEL 0
+#define APDS9160_DEFAULT_PS_ANALOG_CANCELLATION 0
+#define APDS9160_DEFAULT_PS_GAIN 1
+#define APDS9160_DEFAULT_PS_CURRENT 100
+#define APDS9160_DEFAULT_PS_RESOLUTION_11BITS 0x03
+
+static const struct reg_default apds9160_reg_defaults[] = {
+ { APDS9160_REG_CTRL, 0x00 }, /* Sensors disabled by default */
+ { APDS9160_REG_PS_LED, 0x33 }, /* 60 kHz frequency, 100 mA */
+ { APDS9160_REG_PS_PULSES, 0x08 }, /* 8 pulses */
+ { APDS9160_REG_PS_MEAS_RATE, 0x05 }, /* 100ms */
+ { APDS9160_REG_LS_MEAS_RATE, 0x22 }, /* 100ms */
+ { APDS9160_REG_LS_GAIN, 0x01 }, /* 3x */
+ { APDS9160_REG_INT_CFG, 0x10 }, /* Interrupts disabled */
+ { APDS9160_REG_INT_PST, 0x00 },
+ { APDS9160_REG_PS_THRES_HI_LSB, 0xFF },
+ { APDS9160_REG_PS_THRES_HI_MSB, 0x07 },
+ { APDS9160_REG_PS_THRES_LO_LSB, 0x00 },
+ { APDS9160_REG_PS_THRES_LO_MSB, 0x00 },
+ { APDS9160_REG_PS_CAN_LEVEL_DIG_LSB, 0x00 },
+ { APDS9160_REG_PS_CAN_LEVEL_DIG_MSB, 0x00 },
+ { APDS9160_REG_PS_CAN_LEVEL_ANA_DUR, 0x00 },
+ { APDS9160_REG_PS_CAN_LEVEL_ANA_CURRENT, 0x00 },
+ { APDS9160_REG_LS_THRES_UP_LSB, 0xFF },
+ { APDS9160_REG_LS_THRES_UP, 0xFF },
+ { APDS9160_REG_LS_THRES_UP_MSB, 0x0F },
+ { APDS9160_REG_LS_THRES_LO_LSB, 0x00 },
+ { APDS9160_REG_LS_THRES_LO, 0x00 },
+ { APDS9160_REG_LS_THRES_LO_MSB, 0x00 },
+ { APDS9160_REG_LS_THRES_VAR, 0x00 },
+};
+
+static const struct regmap_range apds9160_readable_ranges[] = {
+ regmap_reg_range(APDS9160_REG_CTRL, APDS9160_REG_LS_THRES_VAR),
+};
+
+static const struct regmap_access_table apds9160_readable_table = {
+ .yes_ranges = apds9160_readable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(apds9160_readable_ranges),
+};
+
+static const struct regmap_range apds9160_writeable_ranges[] = {
+ regmap_reg_range(APDS9160_REG_CTRL, APDS9160_REG_LS_GAIN),
+ regmap_reg_range(APDS9160_REG_INT_CFG, APDS9160_REG_LS_THRES_VAR),
+};
+
+static const struct regmap_access_table apds9160_writeable_table = {
+ .yes_ranges = apds9160_writeable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(apds9160_writeable_ranges),
+};
+
+static const struct regmap_range apds9160_volatile_ranges[] = {
+ regmap_reg_range(APDS9160_REG_SR, APDS9160_REG_LS_DATA_ALS_MSB),
+};
+
+static const struct regmap_access_table apds9160_volatile_table = {
+ .yes_ranges = apds9160_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(apds9160_volatile_ranges),
+};
+
+static const struct regmap_config apds9160_regmap_config = {
+ .name = APDS9160_REGMAP_NAME,
+ .reg_bits = 8,
+ .val_bits = 8,
+ .use_single_read = true,
+ .use_single_write = true,
+
+ .rd_table = &apds9160_readable_table,
+ .wr_table = &apds9160_writeable_table,
+ .volatile_table = &apds9160_volatile_table,
+
+ .reg_defaults = apds9160_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(apds9160_reg_defaults),
+ .max_register = 37,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static const struct iio_event_spec apds9160_event_spec[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ },
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ },
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_chan_spec apds9160_channels[] = {
+ {
+ /* Proximity sensor channel */
+ .type = IIO_PROXIMITY,
+ .address = APDS9160_REG_PS_DATA_LSB,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_CALIBBIAS),
+ .info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .event_spec = apds9160_event_spec,
+ .num_event_specs = ARRAY_SIZE(apds9160_event_spec),
+ },
+ {
+ /* Proximity sensor led current */
+ .type = IIO_CURRENT,
+ .output = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW),
+ },
+ {
+ /* Illuminance */
+ .type = IIO_LIGHT,
+ .address = APDS9160_REG_LS_DATA_ALS_LSB,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_HARDWAREGAIN) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .event_spec = apds9160_event_spec,
+ .num_event_specs = ARRAY_SIZE(apds9160_event_spec),
+ },
+ {
+ /* Clear channel */
+ .type = IIO_INTENSITY,
+ .address = APDS9160_REG_LS_DATA_CLEAR_LSB,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .channel2 = IIO_MOD_LIGHT_CLEAR,
+ .modified = 1,
+ },
+};
+
+static const struct iio_chan_spec apds9160_channels_without_events[] = {
+ {
+ /* Proximity sensor channel */
+ .type = IIO_PROXIMITY,
+ .address = APDS9160_REG_PS_DATA_LSB,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_CALIBBIAS),
+ .info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ },
+ {
+ /* Proximity sensor led current */
+ .type = IIO_CURRENT,
+ .output = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW),
+ },
+ {
+ /* Illuminance */
+ .type = IIO_LIGHT,
+ .address = APDS9160_REG_LS_DATA_ALS_LSB,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_HARDWAREGAIN) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ },
+ {
+ /* Clear channel */
+ .type = IIO_INTENSITY,
+ .address = APDS9160_REG_LS_DATA_CLEAR_LSB,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .channel2 = IIO_MOD_LIGHT_CLEAR,
+ .modified = 1,
+ },
+};
+
+static const int apds9160_als_rate_avail[] = {
+ 25, 50, 100, 200
+};
+
+static const int apds9160_als_rate_map[][2] = {
+ { 25, 0x00 },
+ { 50, 0x01 },
+ { 100, 0x02 },
+ { 200, 0x03 },
+};
+
+static const int apds9160_als_gain_map[][2] = {
+ { 1, 0x00 },
+ { 3, 0x01 },
+ { 6, 0x02 },
+ { 18, 0x03 },
+ { 54, 0x04 },
+};
+
+static const int apds9160_ps_gain_avail[] = {
+ 1, 2, 4, 8
+};
+
+static const int apds9160_ps_gain_map[][2] = {
+ { 1, 0x00 },
+ { 2, 0x01 },
+ { 4, 0x02 },
+ { 8, 0x03 },
+};
+
+static const int apds9160_ps_rate_avail[] = {
+ 25, 50, 100, 200, 400
+};
+
+static const int apds9160_ps_rate_map[][2] = {
+ { 25, 0x03 },
+ { 50, 0x04 },
+ { 100, 0x05 },
+ { 200, 0x06 },
+ { 400, 0x07 },
+};
+
+static const int apds9160_ps_led_current_avail[] = {
+ 10, 25, 50, 100, 150, 175, 200
+};
+
+static const int apds9160_ps_led_current_map[][2] = {
+ { 10, 0x00 },
+ { 25, 0x01 },
+ { 50, 0x02 },
+ { 100, 0x03 },
+ { 150, 0x04 },
+ { 175, 0x05 },
+ { 200, 0x06 },
+};
+
+/**
+ * struct apds9160_scale - apds9160 scale mapping definition
+ *
+ * @itime: Integration time in ms
+ * @gain: Gain multiplier
+ * @scale1: lux/count resolution
+ * @scale2: micro lux/count
+ */
+struct apds9160_scale {
+ int itime;
+ int gain;
+ int scale1;
+ int scale2;
+};
+
+/* Scale mapping extracted from datasheet */
+static const struct apds9160_scale apds9160_als_scale_map[] = {
+ {
+ .itime = 25,
+ .gain = 1,
+ .scale1 = 3,
+ .scale2 = 272000,
+ },
+ {
+ .itime = 25,
+ .gain = 3,
+ .scale1 = 1,
+ .scale2 = 77000,
+ },
+ {
+ .itime = 25,
+ .gain = 6,
+ .scale1 = 0,
+ .scale2 = 525000,
+ },
+ {
+ .itime = 25,
+ .gain = 18,
+ .scale1 = 0,
+ .scale2 = 169000,
+ },
+ {
+ .itime = 25,
+ .gain = 54,
+ .scale1 = 0,
+ .scale2 = 49000,
+ },
+ {
+ .itime = 50,
+ .gain = 1,
+ .scale1 = 1,
+ .scale2 = 639000,
+ },
+ {
+ .itime = 50,
+ .gain = 3,
+ .scale1 = 0,
+ .scale2 = 538000,
+ },
+ {
+ .itime = 50,
+ .gain = 6,
+ .scale1 = 0,
+ .scale2 = 263000,
+ },
+ {
+ .itime = 50,
+ .gain = 18,
+ .scale1 = 0,
+ .scale2 = 84000,
+ },
+ {
+ .itime = 50,
+ .gain = 54,
+ .scale1 = 0,
+ .scale2 = 25000,
+ },
+ {
+ .itime = 100,
+ .gain = 1,
+ .scale1 = 0,
+ .scale2 = 819000,
+ },
+ {
+ .itime = 100,
+ .gain = 3,
+ .scale1 = 0,
+ .scale2 = 269000,
+ },
+ {
+ .itime = 100,
+ .gain = 6,
+ .scale1 = 0,
+ .scale2 = 131000,
+ },
+ {
+ .itime = 100,
+ .gain = 18,
+ .scale1 = 0,
+ .scale2 = 42000,
+ },
+ {
+ .itime = 100,
+ .gain = 54,
+ .scale1 = 0,
+ .scale2 = 12000,
+ },
+ {
+ .itime = 200,
+ .gain = 1,
+ .scale1 = 0,
+ .scale2 = 409000,
+ },
+ {
+ .itime = 200,
+ .gain = 3,
+ .scale1 = 0,
+ .scale2 = 135000,
+ },
+ {
+ .itime = 200,
+ .gain = 6,
+ .scale1 = 0,
+ .scale2 = 66000,
+ },
+ {
+ .itime = 200,
+ .gain = 18,
+ .scale1 = 0,
+ .scale2 = 21000,
+ },
+ {
+ .itime = 200,
+ .gain = 54,
+ .scale1 = 0,
+ .scale2 = 6000,
+ },
+};
+
+static const int apds9160_25ms_avail[][2] = {
+ { 3, 272000 },
+ { 1, 77000 },
+ { 0, 525000 },
+ { 0, 169000 },
+ { 0, 49000 },
+};
+
+static const int apds9160_50ms_avail[][2] = {
+ { 1, 639000 },
+ { 0, 538000 },
+ { 0, 263000 },
+ { 0, 84000 },
+ { 0, 25000 },
+};
+
+static const int apds9160_100ms_avail[][2] = {
+ { 0, 819000 },
+ { 0, 269000 },
+ { 0, 131000 },
+ { 0, 42000 },
+ { 0, 12000 },
+};
+
+static const int apds9160_200ms_avail[][2] = {
+ { 0, 409000 },
+ { 0, 135000 },
+ { 0, 66000 },
+ { 0, 21000 },
+ { 0, 6000 },
+};
+
+static const struct reg_field apds9160_reg_field_ls_en =
+ REG_FIELD(APDS9160_REG_CTRL, 1, 1);
+
+static const struct reg_field apds9160_reg_field_ps_en =
+ REG_FIELD(APDS9160_REG_CTRL, 0, 0);
+
+static const struct reg_field apds9160_reg_field_int_ps =
+ REG_FIELD(APDS9160_REG_INT_CFG, 0, 0);
+
+static const struct reg_field apds9160_reg_field_int_als =
+ REG_FIELD(APDS9160_REG_INT_CFG, 2, 2);
+
+static const struct reg_field apds9160_reg_field_ps_overflow =
+ REG_FIELD(APDS9160_REG_PS_DATA_MSB, 3, 3);
+
+static const struct reg_field apds9160_reg_field_als_rate =
+ REG_FIELD(APDS9160_REG_LS_MEAS_RATE, 0, 2);
+
+static const struct reg_field apds9160_reg_field_als_gain =
+ REG_FIELD(APDS9160_REG_LS_GAIN, 0, 2);
+
+static const struct reg_field apds9160_reg_field_ps_rate =
+ REG_FIELD(APDS9160_REG_PS_MEAS_RATE, 0, 2);
+
+static const struct reg_field apds9160_reg_field_als_res =
+ REG_FIELD(APDS9160_REG_LS_MEAS_RATE, 4, 6);
+
+static const struct reg_field apds9160_reg_field_ps_current =
+ REG_FIELD(APDS9160_REG_PS_LED, 0, 2);
+
+static const struct reg_field apds9160_reg_field_ps_gain =
+ REG_FIELD(APDS9160_REG_PS_MEAS_RATE, 6, 7);
+
+static const struct reg_field apds9160_reg_field_ps_resolution =
+ REG_FIELD(APDS9160_REG_PS_MEAS_RATE, 3, 4);
+
+struct apds9160_chip {
+ struct i2c_client *client;
+ struct regmap *regmap;
+
+ struct regmap_field *reg_enable_ps;
+ struct regmap_field *reg_enable_als;
+ struct regmap_field *reg_int_ps;
+ struct regmap_field *reg_int_als;
+ struct regmap_field *reg_ps_overflow;
+ struct regmap_field *reg_als_rate;
+ struct regmap_field *reg_als_resolution;
+ struct regmap_field *reg_ps_rate;
+ struct regmap_field *reg_als_gain;
+ struct regmap_field *reg_ps_current;
+ struct regmap_field *reg_ps_gain;
+ struct regmap_field *reg_ps_resolution;
+
+ struct mutex lock; /* protects state and config data */
+
+ /* State data */
+ int als_int;
+ int ps_int;
+
+ /* Configuration values */
+ int als_itime;
+ int als_hwgain;
+ int als_scale1;
+ int als_scale2;
+ int ps_rate;
+ int ps_cancellation_level;
+ int ps_current;
+ int ps_gain;
+};
+
+static int apds9160_set_ps_rate(struct apds9160_chip *data, int val)
+{
+ int idx;
+
+ for (idx = 0; idx < ARRAY_SIZE(apds9160_ps_rate_map); idx++) {
+ int ret;
+
+ if (apds9160_ps_rate_map[idx][0] != val)
+ continue;
+
+ ret = regmap_field_write(data->reg_ps_rate,
+ apds9160_ps_rate_map[idx][1]);
+ if (ret)
+ return ret;
+ data->ps_rate = val;
+
+ return ret;
+ }
+
+ return -EINVAL;
+}
+
+static int apds9160_set_ps_gain(struct apds9160_chip *data, int val)
+{
+ int idx;
+
+ for (idx = 0; idx < ARRAY_SIZE(apds9160_ps_gain_map); idx++) {
+ int ret;
+
+ if (apds9160_ps_gain_map[idx][0] != val)
+ continue;
+
+ ret = regmap_field_write(data->reg_ps_gain,
+ apds9160_ps_gain_map[idx][1]);
+ if (ret)
+ return ret;
+ data->ps_gain = val;
+
+ return ret;
+ }
+
+ return -EINVAL;
+}
+
+/*
+ * The PS intelligent cancellation level register allows
+ * for an on-chip substraction of the ADC count caused by
+ * unwanted reflected light from PS ADC output.
+ */
+static int apds9160_set_ps_cancellation_level(struct apds9160_chip *data,
+ int val)
+{
+ int ret;
+ __le16 buf;
+
+ if (val < 0 || val > 0xFFFF)
+ return -EINVAL;
+
+ buf = cpu_to_le16(val);
+ ret = regmap_bulk_write(data->regmap, APDS9160_REG_PS_CAN_LEVEL_DIG_LSB,
+ &buf, 2);
+ if (ret)
+ return ret;
+
+ data->ps_cancellation_level = val;
+
+ return ret;
+}
+
+/*
+ * This parameter determines the cancellation pulse duration
+ * in each of the PWM pulse. The cancellation is applied during the
+ * integration phase of the PS measurement.
+ * Duration is programmed in half clock cycles
+ * A duration value of 0 or 1 will not generate any cancellation pulse
+ */
+static int apds9160_set_ps_analog_cancellation(struct apds9160_chip *data,
+ int val)
+{
+ if (val < 0 || val > 63)
+ return -EINVAL;
+
+ return regmap_write(data->regmap, APDS9160_REG_PS_CAN_LEVEL_ANA_DUR,
+ val);
+}
+
+/*
+ * This parameter works in conjunction with the cancellation pulse duration
+ * The value determines the current used for crosstalk cancellation
+ * Coarse value is in steps of 60 nA
+ * Fine value is in steps of 2.4 nA
+ */
+static int apds9160_set_ps_cancellation_current(struct apds9160_chip *data,
+ int coarse_val,
+ int fine_val)
+{
+ int ret, val;
+
+ if (coarse_val < 0 || coarse_val > 4)
+ return -EINVAL;
+
+ if (fine_val < 0 || fine_val > 15)
+ return -EINVAL;
+
+ /* Coarse value at B4:B5 and fine value at B0:B3 */
+ val = (coarse_val << 4) | fine_val;
+
+ ret = regmap_write(data->regmap, APDS9160_REG_PS_CAN_LEVEL_ANA_CURRENT,
+ val);
+
+ return ret;
+}
+
+static int apds9160_ps_init_analog_cancellation(struct device *dev,
+ struct apds9160_chip *data)
+{
+ int ret, duration, picoamp, idx, coarse, fine;
+
+ ret = device_property_read_u32(dev,
+ "ps-cancellation-duration", &duration);
+
+ if (ret || duration == 0)
+ /* Don't fail since this is not required */
+ return 0;
+
+ ret = device_property_read_u32(dev,
+ "ps-cancellation-current-picoamp", &picoamp);
+
+ if (ret)
+ return ret;
+
+ if (picoamp < 60000 || picoamp > 276000 || picoamp % 2400 != 0)
+ return dev_err_probe(dev, -EINVAL,
+ "Invalid cancellation current\n");
+
+ /* Compute required coarse and fine value from requested current */
+ fine = 0;
+ coarse = 0;
+ for (idx = 60000; idx < picoamp; idx += 2400) {
+ if (fine == 15) {
+ fine = 0;
+ coarse++;
+ idx += 21600;
+ } else {
+ fine++;
+ }
+ }
+
+ if (picoamp != idx)
+ dev_warn(dev,
+ "Invalid cancellation current %i, rounding to %i\n",
+ picoamp, idx);
+
+ ret = apds9160_set_ps_analog_cancellation(data, duration);
+ if (ret)
+ return ret;
+
+ return apds9160_set_ps_cancellation_current(data, coarse, fine);
+}
+
+static int apds9160_set_ps_current(struct apds9160_chip *data, int val)
+{
+ int idx;
+
+ for (idx = 0; idx < ARRAY_SIZE(apds9160_ps_led_current_map); idx++) {
+ int ret;
+
+ if (apds9160_ps_led_current_map[idx][0] != val)
+ continue;
+
+ ret = regmap_field_write(
+ data->reg_ps_current,
+ apds9160_ps_led_current_map[idx][1]);
+ if (ret)
+ return ret;
+ data->ps_current = val;
+
+ return ret;
+ }
+
+ return -EINVAL;
+}
+
+static int apds9160_set_als_gain(struct apds9160_chip *data, int gain)
+{
+ int idx;
+
+ for (idx = 0; idx < ARRAY_SIZE(apds9160_als_gain_map); idx++) {
+ int ret;
+
+ if (gain != apds9160_als_gain_map[idx][0])
+ continue;
+
+ ret = regmap_field_write(data->reg_als_gain,
+ apds9160_als_gain_map[idx][1]);
+ if (ret)
+ return ret;
+ data->als_hwgain = gain;
+
+ return ret;
+ }
+
+ return -EINVAL;
+}
+
+static int apds9160_set_als_scale(struct apds9160_chip *data, int val, int val2)
+{
+ int idx;
+
+ for (idx = 0; idx < ARRAY_SIZE(apds9160_als_scale_map); idx++) {
+ if (apds9160_als_scale_map[idx].itime == data->als_itime &&
+ apds9160_als_scale_map[idx].scale1 == val &&
+ apds9160_als_scale_map[idx].scale2 == val2) {
+ int ret = apds9160_set_als_gain(data,
+ apds9160_als_scale_map[idx].gain);
+ if (ret)
+ return ret;
+ data->als_scale1 = val;
+ data->als_scale2 = val2;
+
+ return ret;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int apds9160_set_als_resolution(struct apds9160_chip *data, int val)
+{
+ switch (val) {
+ case 25:
+ return regmap_field_write(data->reg_als_resolution,
+ APDS9160_CMD_LS_RESOLUTION_25MS);
+ case 50:
+ return regmap_field_write(data->reg_als_resolution,
+ APDS9160_CMD_LS_RESOLUTION_50MS);
+ case 200:
+ return regmap_field_write(data->reg_als_resolution,
+ APDS9160_CMD_LS_RESOLUTION_200MS);
+ default:
+ return regmap_field_write(data->reg_als_resolution,
+ APDS9160_CMD_LS_RESOLUTION_100MS);
+ }
+}
+
+static int apds9160_set_als_rate(struct apds9160_chip *data, int val)
+{
+ int idx;
+
+ for (idx = 0; idx < ARRAY_SIZE(apds9160_als_rate_map); idx++) {
+ if (apds9160_als_rate_map[idx][0] != val)
+ continue;
+
+ return regmap_field_write(data->reg_als_rate,
+ apds9160_als_rate_map[idx][1]);
+ }
+
+ return -EINVAL;
+}
+
+/*
+ * Setting the integration time ajusts resolution, rate, scale and gain
+ */
+static int apds9160_set_als_int_time(struct apds9160_chip *data, int val)
+{
+ int ret;
+ int idx;
+
+ ret = apds9160_set_als_rate(data, val);
+ if (ret)
+ return ret;
+
+ /* Match resolution register with rate */
+ ret = apds9160_set_als_resolution(data, val);
+ if (ret)
+ return ret;
+
+ data->als_itime = val;
+
+ /* Set the scale minimum gain */
+ for (idx = 0; idx < ARRAY_SIZE(apds9160_als_scale_map); idx++) {
+ if (data->als_itime != apds9160_als_scale_map[idx].itime)
+ continue;
+
+ return apds9160_set_als_scale(data,
+ apds9160_als_scale_map[idx].scale1,
+ apds9160_als_scale_map[idx].scale2);
+ }
+
+ return -EINVAL;
+}
+
+static int apds9160_read_avail(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ const int **vals, int *type, int *length,
+ long mask)
+{
+ struct apds9160_chip *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ *length = ARRAY_SIZE(apds9160_als_rate_avail);
+ *vals = (const int *)apds9160_als_rate_avail;
+ *type = IIO_VAL_INT;
+
+ return IIO_AVAIL_LIST;
+ case IIO_PROXIMITY:
+ *length = ARRAY_SIZE(apds9160_ps_rate_avail);
+ *vals = (const int *)apds9160_ps_rate_avail;
+ *type = IIO_VAL_INT;
+
+ return IIO_AVAIL_LIST;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ *length = ARRAY_SIZE(apds9160_ps_gain_avail);
+ *vals = (const int *)apds9160_ps_gain_avail;
+ *type = IIO_VAL_INT;
+
+ return IIO_AVAIL_LIST;
+ case IIO_LIGHT:
+ /* The available scales changes depending on itime */
+ switch (data->als_itime) {
+ case 25:
+ *length = ARRAY_SIZE(apds9160_25ms_avail) * 2;
+ *vals = (const int *) apds9160_25ms_avail;
+ *type = IIO_VAL_INT_PLUS_MICRO;
+
+ return IIO_AVAIL_LIST;
+ case 50:
+ *length = ARRAY_SIZE(apds9160_50ms_avail) * 2;
+ *vals = (const int *) apds9160_50ms_avail;
+ *type = IIO_VAL_INT_PLUS_MICRO;
+
+ return IIO_AVAIL_LIST;
+ case 100:
+ *length = ARRAY_SIZE(apds9160_100ms_avail) * 2;
+ *vals = (const int *) apds9160_100ms_avail;
+ *type = IIO_VAL_INT_PLUS_MICRO;
+
+ return IIO_AVAIL_LIST;
+ case 200:
+ *length = ARRAY_SIZE(apds9160_200ms_avail) * 2;
+ *vals = (const int *) apds9160_200ms_avail;
+ *type = IIO_VAL_INT_PLUS_MICRO;
+
+ return IIO_AVAIL_LIST;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_CURRENT:
+ *length = ARRAY_SIZE(apds9160_ps_led_current_avail);
+ *vals = (const int *)apds9160_ps_led_current_avail;
+ *type = IIO_VAL_INT;
+
+ return IIO_AVAIL_LIST;
+ default:
+ return -EINVAL;
+ }
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int apds9160_write_raw_get_fmt(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ long mask)
+{
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_HARDWAREGAIN:
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_RAW:
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int apds9160_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ struct apds9160_chip *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_PROXIMITY: {
+ __le16 buf;
+
+ ret = regmap_bulk_read(data->regmap, chan->address,
+ &buf, 2);
+ if (ret)
+ return ret;
+ *val = le16_to_cpu(buf);
+ /* Remove overflow bits from result */
+ *val = FIELD_GET(APDS9160_PS_DATA_MASK, *val);
+
+ return IIO_VAL_INT;
+ }
+ case IIO_LIGHT:
+ case IIO_INTENSITY: {
+ u8 buf[3];
+
+ ret = regmap_bulk_read(data->regmap, chan->address,
+ &buf, 3);
+ if (ret)
+ return ret;
+ *val = get_unaligned_le24(buf);
+
+ return IIO_VAL_INT;
+ }
+ case IIO_CURRENT:
+ *val = data->ps_current;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_HARDWAREGAIN:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ *val = data->als_hwgain;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_INT_TIME:
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ *val = data->ps_rate;
+
+ return IIO_VAL_INT;
+ case IIO_LIGHT:
+ *val = data->als_itime;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_CALIBBIAS:
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ *val = data->ps_cancellation_level;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ *val = data->ps_gain;
+
+ return IIO_VAL_INT;
+ case IIO_LIGHT:
+ *val = data->als_scale1;
+ *val2 = data->als_scale2;
+
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+};
+
+static int apds9160_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val,
+ int val2, long mask)
+{
+ struct apds9160_chip *data = iio_priv(indio_dev);
+
+ guard(mutex)(&data->lock);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ if (val2 != 0)
+ return -EINVAL;
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ return apds9160_set_ps_rate(data, val);
+ case IIO_LIGHT:
+ return apds9160_set_als_int_time(data, val);
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ return apds9160_set_ps_gain(data, val);
+ case IIO_LIGHT:
+ return apds9160_set_als_scale(data, val, val2);
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (val2 != 0)
+ return -EINVAL;
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ return apds9160_set_ps_cancellation_level(data, val);
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_RAW:
+ if (val2 != 0)
+ return -EINVAL;
+ switch (chan->type) {
+ case IIO_CURRENT:
+ return apds9160_set_ps_current(data, val);
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static inline int apds9160_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 = APDS9160_REG_PS_THRES_HI_LSB;
+ break;
+ case IIO_LIGHT:
+ *reg = APDS9160_REG_LS_THRES_UP_LSB;
+ break;
+ default:
+ return -EINVAL;
+ } break;
+ case IIO_EV_DIR_FALLING:
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ *reg = APDS9160_REG_PS_THRES_LO_LSB;
+ break;
+ case IIO_LIGHT:
+ *reg = APDS9160_REG_LS_THRES_LO_LSB;
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int apds9160_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;
+ int ret;
+ struct apds9160_chip *data = iio_priv(indio_dev);
+
+ if (info != IIO_EV_INFO_VALUE)
+ return -EINVAL;
+
+ ret = apds9160_get_thres_reg(chan, dir, &reg);
+ if (ret < 0)
+ return ret;
+
+ switch (chan->type) {
+ case IIO_PROXIMITY: {
+ __le16 buf;
+
+ ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
+ if (ret < 0)
+ return ret;
+ *val = le16_to_cpu(buf);
+ return IIO_VAL_INT;
+ }
+ case IIO_LIGHT: {
+ u8 buf[3];
+
+ ret = regmap_bulk_read(data->regmap, reg, &buf, 3);
+ if (ret < 0)
+ return ret;
+ *val = get_unaligned_le24(buf);
+ return IIO_VAL_INT;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int apds9160_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;
+ int ret = 0;
+ struct apds9160_chip *data = iio_priv(indio_dev);
+
+ if (info != IIO_EV_INFO_VALUE)
+ return -EINVAL;
+
+ ret = apds9160_get_thres_reg(chan, dir, &reg);
+ if (ret < 0)
+ return ret;
+
+ switch (chan->type) {
+ case IIO_PROXIMITY: {
+ __le16 buf;
+
+ if (val < 0 || val > APDS9160_PS_THRES_MAX)
+ return -EINVAL;
+
+ buf = cpu_to_le16(val);
+ return regmap_bulk_write(data->regmap, reg, &buf, 2);
+ }
+ case IIO_LIGHT: {
+ u8 buf[3];
+
+ if (val < 0 || val > APDS9160_LS_THRES_MAX)
+ return -EINVAL;
+
+ put_unaligned_le24(val, buf);
+ return regmap_bulk_write(data->regmap, reg, &buf, 3);
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int apds9160_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 apds9160_chip *data = iio_priv(indio_dev);
+
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ return data->ps_int;
+ case IIO_LIGHT:
+ return data->als_int;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int apds9160_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 apds9160_chip *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ ret = regmap_field_write(data->reg_int_ps, state);
+ if (ret)
+ return ret;
+ data->ps_int = state;
+
+ return 0;
+ case IIO_LIGHT:
+ ret = regmap_field_write(data->reg_int_als, state);
+ if (ret)
+ return ret;
+ data->als_int = state;
+
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static irqreturn_t apds9160_irq_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct apds9160_chip *data = iio_priv(indio_dev);
+ int ret, status;
+
+ /* Reading status register clears the interrupt flag */
+ ret = regmap_read(data->regmap, APDS9160_REG_SR, &status);
+ if (ret < 0) {
+ dev_err_ratelimited(&data->client->dev,
+ "irq status reg read failed\n");
+ return IRQ_HANDLED;
+ }
+
+ if ((status & APDS9160_SR_LS_INT) &&
+ (status & APDS9160_SR_LS_NEW_DATA) && data->als_int) {
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ iio_get_time_ns(indio_dev));
+ }
+
+ if ((status & APDS9160_SR_PS_INT) &&
+ (status & APDS9160_SR_PS_NEW_DATA) && data->ps_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(indio_dev));
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int apds9160_detect(struct apds9160_chip *chip)
+{
+ struct i2c_client *client = chip->client;
+ int ret;
+ u32 val;
+
+ ret = regmap_read(chip->regmap, APDS9160_REG_ID, &val);
+ if (ret < 0) {
+ dev_err(&client->dev, "ID read failed\n");
+ return ret;
+ }
+
+ if (val != APDS9160_PART_ID_0)
+ dev_info(&client->dev, "Unknown part id %u\n", val);
+
+ return 0;
+}
+
+static void apds9160_disable(void *chip)
+{
+ struct apds9160_chip *data = chip;
+ int ret;
+
+ ret = regmap_field_write(data->reg_enable_als, 0);
+ if (ret)
+ return;
+
+ regmap_field_write(data->reg_enable_ps, 0);
+}
+
+static int apds9160_chip_init(struct apds9160_chip *chip)
+{
+ int ret;
+
+ /* Write default values to interrupt register */
+ ret = regmap_field_write(chip->reg_int_ps, 0);
+ chip->ps_int = 0;
+ if (ret)
+ return ret;
+
+ ret = regmap_field_write(chip->reg_int_als, 0);
+ chip->als_int = 0;
+ if (ret)
+ return ret;
+
+ /* Write default values to control register */
+ ret = regmap_field_write(chip->reg_enable_als, 1);
+ if (ret)
+ return ret;
+
+ ret = regmap_field_write(chip->reg_enable_ps, 1);
+ if (ret)
+ return ret;
+
+ /* Write other default values */
+ ret = regmap_field_write(chip->reg_ps_resolution,
+ APDS9160_DEFAULT_PS_RESOLUTION_11BITS);
+ if (ret)
+ return ret;
+
+ /* Write default values to configuration registers */
+ ret = apds9160_set_ps_current(chip, APDS9160_DEFAULT_PS_CURRENT);
+ if (ret)
+ return ret;
+
+ ret = apds9160_set_ps_rate(chip, APDS9160_DEFAULT_PS_RATE);
+ if (ret)
+ return ret;
+
+ ret = apds9160_set_als_int_time(chip, APDS9160_DEFAULT_LS_RATE);
+ if (ret)
+ return ret;
+
+ ret = apds9160_set_als_scale(chip,
+ apds9160_100ms_avail[0][0],
+ apds9160_100ms_avail[0][1]);
+ if (ret)
+ return ret;
+
+ ret = apds9160_set_ps_gain(chip, APDS9160_DEFAULT_PS_GAIN);
+ if (ret)
+ return ret;
+
+ ret = apds9160_set_ps_analog_cancellation(
+ chip, APDS9160_DEFAULT_PS_ANALOG_CANCELLATION);
+ if (ret)
+ return ret;
+
+ ret = apds9160_set_ps_cancellation_level(
+ chip, APDS9160_DEFAULT_PS_CANCELLATION_LEVEL);
+ if (ret)
+ return ret;
+
+ return devm_add_action_or_reset(&chip->client->dev, apds9160_disable,
+ chip);
+}
+
+static int apds9160_regfield_init(struct apds9160_chip *data)
+{
+ struct device *dev = &data->client->dev;
+ struct regmap *regmap = data->regmap;
+ struct regmap_field *tmp;
+
+ tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_int_als);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
+ data->reg_int_als = tmp;
+
+ tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_int_ps);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
+ data->reg_int_ps = tmp;
+
+ tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_ls_en);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
+ data->reg_enable_als = tmp;
+
+ tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_ps_en);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
+ data->reg_enable_ps = tmp;
+
+ tmp = devm_regmap_field_alloc(dev, regmap,
+ apds9160_reg_field_ps_overflow);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
+ data->reg_ps_overflow = tmp;
+
+ tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_als_rate);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
+ data->reg_als_rate = tmp;
+
+ tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_als_res);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
+ data->reg_als_resolution = tmp;
+
+ tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_ps_rate);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
+ data->reg_ps_rate = tmp;
+
+ tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_als_gain);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
+ data->reg_als_gain = tmp;
+
+ tmp = devm_regmap_field_alloc(dev, regmap,
+ apds9160_reg_field_ps_current);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
+ data->reg_ps_current = tmp;
+
+ tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_ps_gain);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
+ data->reg_ps_gain = tmp;
+
+ tmp = devm_regmap_field_alloc(dev, regmap,
+ apds9160_reg_field_ps_resolution);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
+ data->reg_ps_resolution = tmp;
+
+ return 0;
+}
+
+static const struct iio_info apds9160_info = {
+ .read_avail = apds9160_read_avail,
+ .read_raw = apds9160_read_raw,
+ .write_raw = apds9160_write_raw,
+ .write_raw_get_fmt = apds9160_write_raw_get_fmt,
+ .read_event_value = apds9160_read_event,
+ .write_event_value = apds9160_write_event,
+ .read_event_config = apds9160_read_event_config,
+ .write_event_config = apds9160_write_event_config,
+};
+
+static const struct iio_info apds9160_info_no_events = {
+ .read_avail = apds9160_read_avail,
+ .read_raw = apds9160_read_raw,
+ .write_raw = apds9160_write_raw,
+ .write_raw_get_fmt = apds9160_write_raw_get_fmt,
+};
+
+static int apds9160_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct apds9160_chip *chip;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*chip));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ ret = devm_regulator_get_enable(dev, "vdd");
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to enable vdd supply\n");
+
+ indio_dev->name = "apds9160";
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ chip = iio_priv(indio_dev);
+ chip->client = client;
+ chip->regmap = devm_regmap_init_i2c(client, &apds9160_regmap_config);
+ if (IS_ERR(chip->regmap))
+ return dev_err_probe(dev, PTR_ERR(chip->regmap),
+ "regmap initialization failed.\n");
+
+ chip->client = client;
+ mutex_init(&chip->lock);
+
+ ret = apds9160_detect(chip);
+ if (ret < 0)
+ return dev_err_probe(dev, ret, "apds9160 not found\n");
+
+ ret = apds9160_regfield_init(chip);
+ if (ret)
+ return ret;
+
+ ret = apds9160_chip_init(chip);
+ if (ret)
+ return ret;
+
+ ret = apds9160_ps_init_analog_cancellation(dev, chip);
+ if (ret)
+ return ret;
+
+ if (client->irq > 0) {
+ indio_dev->info = &apds9160_info;
+ indio_dev->channels = apds9160_channels;
+ indio_dev->num_channels = ARRAY_SIZE(apds9160_channels);
+ ret = devm_request_threaded_irq(dev, client->irq, NULL,
+ apds9160_irq_handler,
+ IRQF_ONESHOT, "apds9160_event",
+ indio_dev);
+ if (ret) {
+ return dev_err_probe(dev, ret,
+ "request irq (%d) failed\n",
+ client->irq);
+ }
+ } else {
+ indio_dev->info = &apds9160_info_no_events;
+ indio_dev->channels = apds9160_channels_without_events;
+ indio_dev->num_channels =
+ ARRAY_SIZE(apds9160_channels_without_events);
+ }
+
+ ret = devm_iio_device_register(dev, indio_dev);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "failed iio device registration\n");
+
+ return ret;
+}
+
+static const struct of_device_id apds9160_of_match[] = {
+ { .compatible = "brcm,apds9160" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, apds9160_of_match);
+
+static const struct i2c_device_id apds9160_id[] = {
+ { "apds9160", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, apds9160_id);
+
+static struct i2c_driver apds9160_driver = {
+ .driver = {
+ .name = "apds9160",
+ .of_match_table = apds9160_of_match,
+ },
+ .probe = apds9160_probe,
+ .id_table = apds9160_id,
+};
+module_i2c_driver(apds9160_driver);
+
+MODULE_DESCRIPTION("APDS9160 combined ALS and proximity sensor");
+MODULE_AUTHOR("Mikael Gonella-Bolduc <m.gonella.bolduc@gmail.com>");
+MODULE_LICENSE("GPL");

--
2.34.1