* [PATCH v2 2/2] iio: light: veml3328: add support for new device
2026-05-20 21:15 [PATCH v2 0/2] iio: light: veml3328: add support for new sensor Joshua Crofts
2026-05-20 21:15 ` [PATCH v2 1/2] dt-bindings: iio: light: veml6030: add veml3328 Joshua Crofts
@ 2026-05-20 21:15 ` Joshua Crofts
2026-05-20 22:00 ` sashiko-bot
1 sibling, 1 reply; 5+ messages in thread
From: Joshua Crofts @ 2026-05-20 21:15 UTC (permalink / raw)
To: Jonathan Cameron, David Lechner, Nuno Sá, Andy Shevchenko,
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Javier Carrasco,
Rishi Gupta
Cc: linux-iio, devicetree, linux-kernel, Joshua Crofts
Add support for the Vishay VEML3328 RGB/IR light sensor communicating
via I2C (SMBus compatible).
Also add a new entry for said driver into Kconfig and Makefile.
Assisted-by: Gemini:3.1-Pro
Signed-off-by: Joshua Crofts <joshua.crofts1@gmail.com>
---
MAINTAINERS | 5 +
drivers/iio/light/Kconfig | 11 ++
drivers/iio/light/Makefile | 1 +
drivers/iio/light/veml3328.c | 416 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 433 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index d6c3c7d22403..8236ba0c41ca 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -28386,6 +28386,11 @@ S: Maintained
F: Documentation/devicetree/bindings/iio/light/vishay,veml6030.yaml
F: drivers/iio/light/veml3235.c
+VISHAY VEML3328 RGB IR LIGHT SENSOR DRIVER
+M: Joshua Crofts <joshua.crofts1@gmail.com>
+S: Maintained
+F: drivers/iio/light/veml3328.c
+
VISHAY VEML6030 AMBIENT LIGHT SENSOR DRIVER
M: Javier Carrasco <javier.carrasco.cruz@gmail.com>
S: Maintained
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index eff33e456c70..1c00bb0de6c8 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -699,6 +699,17 @@ config VEML3235
To compile this driver as a module, choose M here: the
module will be called veml3235.
+config VEML3328
+ tristate "VEML3328 RGBCIR light sensor"
+ select REGMAP_I2C
+ depends on I2C
+ help
+ Say Y here if you want to build a driver for the Vishay VEML3328
+ RGB IR light sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called veml3328
+
config VEML6030
tristate "VEML6030 and VEML6035 ambient light sensors"
select REGMAP_I2C
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index c0048e0d5ca8..e03c6e23a9a4 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -65,6 +65,7 @@ obj-$(CONFIG_US5182D) += us5182d.o
obj-$(CONFIG_VCNL4000) += vcnl4000.o
obj-$(CONFIG_VCNL4035) += vcnl4035.o
obj-$(CONFIG_VEML3235) += veml3235.o
+obj-$(CONFIG_VEML3328) += veml3328.o
obj-$(CONFIG_VEML6030) += veml6030.o
obj-$(CONFIG_VEML6040) += veml6040.o
obj-$(CONFIG_VEML6046X00) += veml6046x00.o
diff --git a/drivers/iio/light/veml3328.c b/drivers/iio/light/veml3328.c
new file mode 100644
index 000000000000..fdfa8fd1666b
--- /dev/null
+++ b/drivers/iio/light/veml3328.c
@@ -0,0 +1,416 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Vishay VEML3328 RGBCIR light sensor driver
+ *
+ * Copyright (c) 2026 Joshua Crofts <joshua.crofts1@gmail.com>
+ *
+ * Datasheet: https://www.vishay.com/docs/84968/veml3328.pdf
+ */
+
+#include <linux/array_size.h>
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/cleanup.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/time.h>
+#include <linux/types.h>
+
+#include <linux/iio/iio.h>
+
+#define VEML3328_REG_CONF 0x00
+#define VEML3328_REG_ID 0x0c
+#define VEML3328_REG_DATA_C 0x04
+#define VEML3328_REG_DATA_R 0x05
+#define VEML3328_REG_DATA_G 0x06
+#define VEML3328_REG_DATA_B 0x07
+#define VEML3328_REG_DATA_IR 0x08
+
+#define VEML3328_CONF_IT_MASK GENMASK(5, 4)
+#define VEML3328_CONF_GAIN_MASK GENMASK(11, 10)
+
+#define VEML3328_MAX_IT_TIME (400 * USEC_PER_MSEC)
+
+#define VEML3328_ID_VAL 0x28
+
+#define VEML3328_SHUTDOWN (BIT(0) | BIT(15))
+
+struct veml3328_data {
+ struct regmap *regmap;
+};
+
+static const struct regmap_config veml3328_regmap_config = {
+ .name = "veml3328",
+ .reg_bits = 8,
+ .val_bits = 16,
+ .max_register = VEML3328_REG_ID,
+ .val_format_endian = REGMAP_ENDIAN_LITTLE,
+};
+
+#define VEML3328_CHAN_SPEC(_color, _addr) { \
+ .type = IIO_INTENSITY, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_LIGHT_##_color, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .address = _addr, \
+}
+
+static const struct iio_chan_spec veml3328_channels[] = {
+ {
+ .type = IIO_LIGHT,
+
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME),
+ .address = VEML3328_REG_DATA_G,
+ },
+ VEML3328_CHAN_SPEC(CLEAR, VEML3328_REG_DATA_C),
+ VEML3328_CHAN_SPEC(RED, VEML3328_REG_DATA_R),
+ VEML3328_CHAN_SPEC(GREEN, VEML3328_REG_DATA_G),
+ VEML3328_CHAN_SPEC(BLUE, VEML3328_REG_DATA_B),
+ VEML3328_CHAN_SPEC(IR, VEML3328_REG_DATA_IR),
+};
+
+/* scale values per datasheet */
+static const int veml3328_scale_vals[][2] = {
+ { 0, 500000 },
+ { 1, 0 },
+ { 2, 0 },
+ { 4, 0 },
+};
+
+/* integration times in microseconds */
+static const int veml3328_it_times[][2] = {
+ { 0, 50 * USEC_PER_MSEC },
+ { 0, 100 * USEC_PER_MSEC },
+ { 0, 200 * USEC_PER_MSEC },
+ { 0, 400 * USEC_PER_MSEC },
+};
+
+static int veml3328_power_down(struct veml3328_data *data)
+{
+ return regmap_set_bits(data->regmap, VEML3328_REG_CONF,
+ VEML3328_SHUTDOWN);
+}
+
+static int veml3328_power_up(struct veml3328_data *data)
+{
+ int ret;
+
+ ret = regmap_clear_bits(data->regmap, VEML3328_REG_CONF,
+ VEML3328_SHUTDOWN);
+ if (ret)
+ return ret;
+
+ /*
+ * Sleep for maximum integration time to ensure sensor is powered on
+ * correctly.
+ */
+ fsleep(VEML3328_MAX_IT_TIME);
+
+ return 0;
+}
+
+static void veml3328_power_down_action(void *data)
+{
+ veml3328_power_down(data);
+}
+
+static int veml3328_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct veml3328_data *data = iio_priv(indio_dev);
+ struct regmap *regmap = data->regmap;
+ struct device *dev = regmap_get_device(regmap);
+ unsigned int reg_val;
+ int ret;
+ int reg;
+
+ PM_RUNTIME_ACQUIRE_IF_ENABLED_AUTOSUSPEND(dev, pm);
+ ret = PM_RUNTIME_ACQUIRE_ERR(&pm);
+ if (ret)
+ return ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = regmap_read(regmap, chan->address, ®_val);
+ if (ret)
+ return ret;
+
+ *val = reg_val;
+ return IIO_VAL_INT;
+
+ case IIO_CHAN_INFO_INT_TIME:
+ ret = regmap_read(regmap, VEML3328_REG_CONF, ®_val);
+ if (ret)
+ return ret;
+
+ reg = FIELD_GET(VEML3328_CONF_IT_MASK, reg_val);
+ if (reg >= ARRAY_SIZE(veml3328_it_times))
+ return -EINVAL;
+
+ *val = veml3328_it_times[reg][0];
+ *val2 = veml3328_it_times[reg][1];
+ return IIO_VAL_INT_PLUS_MICRO;
+
+ case IIO_CHAN_INFO_SCALE:
+ ret = regmap_read(regmap, VEML3328_REG_CONF, ®_val);
+ if (ret)
+ return ret;
+
+ if (chan->type == IIO_LIGHT) {
+ int it_inx, gain_inx;
+ int it_us, scale_u;
+
+ it_inx = FIELD_GET(VEML3328_CONF_IT_MASK, reg_val);
+ gain_inx = FIELD_GET(VEML3328_CONF_GAIN_MASK, reg_val);
+
+ if (it_inx >= ARRAY_SIZE(veml3328_it_times) ||
+ gain_inx >= ARRAY_SIZE(veml3328_scale_vals))
+ return -EINVAL;
+
+ it_us = veml3328_it_times[it_inx][1];
+
+ /*
+ * Equation for calculating ambient light scale:
+ * Scale = 0.384 * (50000 / Current_IT) * (1x / Current_Gain)
+ */
+ scale_u = 384 * USEC_PER_MSEC;
+ scale_u = scale_u * 50000 / it_us;
+
+ switch (gain_inx) {
+ case 0:
+ scale_u *= 2;
+ break;
+ case 1:
+ break;
+ case 2:
+ scale_u /= 2;
+ break;
+ case 3:
+ scale_u /= 4;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ *val = 0;
+ *val2 = scale_u;
+
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+
+ reg = FIELD_GET(VEML3328_CONF_GAIN_MASK, reg_val);
+ if (reg >= ARRAY_SIZE(veml3328_scale_vals))
+ return -EINVAL;
+
+ *val = veml3328_scale_vals[reg][0];
+ *val2 = veml3328_scale_vals[reg][1];
+ return IIO_VAL_INT_PLUS_MICRO;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int veml3328_read_avail(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ const int **vals, int *type, int *length,
+ long mask)
+{
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ *length = ARRAY_SIZE(veml3328_it_times) * 2;
+ *vals = (const int *)veml3328_it_times;
+ *type = IIO_VAL_INT_PLUS_MICRO;
+ return IIO_AVAIL_LIST;
+
+ case IIO_CHAN_INFO_SCALE:
+ *length = ARRAY_SIZE(veml3328_scale_vals) * 2;
+ *vals = (const int *)veml3328_scale_vals;
+ *type = IIO_VAL_INT_PLUS_MICRO;
+ return IIO_AVAIL_LIST;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int veml3328_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct veml3328_data *data = iio_priv(indio_dev);
+ struct regmap *regmap = data->regmap;
+ struct device *dev = regmap_get_device(regmap);
+ int ret;
+ int i;
+
+ PM_RUNTIME_ACQUIRE_IF_ENABLED_AUTOSUSPEND(dev, pm);
+ ret = PM_RUNTIME_ACQUIRE_ERR(&pm);
+ if (ret)
+ return ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ if (val != 0)
+ return -EINVAL;
+
+ for (i = 0; i < ARRAY_SIZE(veml3328_it_times); i++) {
+ if (veml3328_it_times[i][1] == val2)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(veml3328_it_times))
+ return -EINVAL;
+
+ return regmap_update_bits(regmap, VEML3328_REG_CONF,
+ VEML3328_CONF_IT_MASK,
+ FIELD_PREP(VEML3328_CONF_IT_MASK, i));
+
+ case IIO_CHAN_INFO_SCALE:
+ for (i = 0; i < ARRAY_SIZE(veml3328_scale_vals); i++) {
+ if (val == veml3328_scale_vals[i][0] &&
+ val2 == veml3328_scale_vals[i][1])
+ break;
+ }
+
+ if (i == ARRAY_SIZE(veml3328_scale_vals))
+ return -EINVAL;
+
+ return regmap_update_bits(regmap, VEML3328_REG_CONF,
+ VEML3328_CONF_GAIN_MASK,
+ FIELD_PREP(VEML3328_CONF_GAIN_MASK, i));
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_info veml3328_info = {
+ .read_raw = veml3328_read_raw,
+ .write_raw = veml3328_write_raw,
+ .read_avail = veml3328_read_avail,
+};
+
+static int veml3328_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct veml3328_data *data;
+ struct iio_dev *indio_dev;
+ unsigned int reg_val;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+
+ data->regmap = devm_regmap_init_i2c(client, &veml3328_regmap_config);
+ if (IS_ERR(data->regmap))
+ return dev_err_probe(dev, PTR_ERR(data->regmap),
+ "Failed to initialize regmap\n");
+
+ ret = devm_regulator_get_enable(dev, "vdd");
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to enable regulator\n");
+
+ ret = regmap_read(data->regmap, VEML3328_REG_ID, ®_val);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to read ID register\n");
+
+ if ((reg_val & 0xff) != VEML3328_ID_VAL)
+ dev_warn(dev, "Unknown device ID: 0x%02x\n", reg_val & 0xff);
+
+ ret = veml3328_power_up(data);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to power on sensor\n");
+
+ ret = devm_add_action_or_reset(dev, veml3328_power_down_action, data);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to register teardown\n");
+
+ indio_dev->name = "veml3328";
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &veml3328_info;
+ indio_dev->channels = veml3328_channels;
+ indio_dev->num_channels = ARRAY_SIZE(veml3328_channels);
+
+ pm_runtime_set_active(dev);
+ pm_runtime_set_autosuspend_delay(dev, 2000);
+ pm_runtime_use_autosuspend(dev);
+
+ ret = devm_pm_runtime_enable(dev);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to enable runtime PM\n");
+
+ return devm_iio_device_register(dev, indio_dev);
+}
+
+static int veml3328_runtime_suspend(struct device *dev)
+{
+ struct veml3328_data *data = iio_priv(dev_get_drvdata(dev));
+ int ret;
+
+ ret = veml3328_power_down(data);
+ if (ret)
+ dev_err(dev, "Failed to suspend: %d\n", ret);
+
+ return ret;
+}
+
+static int veml3328_runtime_resume(struct device *dev)
+{
+ struct veml3328_data *data = iio_priv(dev_get_drvdata(dev));
+ int ret;
+
+ ret = veml3328_power_up(data);
+ if (ret)
+ dev_err(dev, "Failed to resume: %d\n", ret);
+
+ return ret;
+}
+
+static DEFINE_RUNTIME_DEV_PM_OPS(veml3328_pm_ops,
+ veml3328_runtime_suspend,
+ veml3328_runtime_resume,
+ NULL);
+
+static const struct of_device_id veml3328_of_match[] = {
+ { .compatible = "vishay,veml3328" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, veml3328_of_match);
+
+static const struct i2c_device_id veml3328_id[] = {
+ { .name = "veml3328" },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, veml3328_id);
+
+static struct i2c_driver veml3328_driver = {
+ .driver = {
+ .name = "veml3328",
+ .of_match_table = veml3328_of_match,
+ .pm = pm_ptr(&veml3328_pm_ops),
+ },
+ .probe = veml3328_probe,
+ .id_table = veml3328_id,
+};
+module_i2c_driver(veml3328_driver);
+
+MODULE_AUTHOR("Joshua Crofts <joshua.crofts1@gmail.com>");
+MODULE_DESCRIPTION("VEML3328 RGBCIR Light Sensor");
+MODULE_LICENSE("GPL");
--
2.34.1
^ permalink raw reply related [flat|nested] 5+ messages in thread