[PATCH] Dyna-Image AL3320A update, add AL3010 driver
From: Rocky Hsiao
Date: Fri Jun 03 2016 - 00:03:12 EST
1. Change al3320a.c to match light sensor test flow.
2. Add al3010.c to add new device AL3010.
original file copy from al3320a.c
Signed-off-by: Rocky Hsiao <rocky.hsiao@xxxxxxxxxxxxxx>
---
.../config/x86_64/chromiumos-x86_64.flavour.config | 2 +
drivers/iio/light/Kconfig | 10 +
drivers/iio/light/Makefile | 1 +
drivers/iio/light/al3010.c | 301 +++++++++++++++++++++
drivers/iio/light/al3320a.c | 73 ++++-
5 files changed, 378 insertions(+), 9 deletions(-)
create mode 100644 drivers/iio/light/al3010.c
diff --git a/chromeos/config/x86_64/chromiumos-x86_64.flavour.config b/chromeos/config/x86_64/chromiumos-x86_64.flavour.config
index 7d2bed4..7980a14 100644
--- a/chromeos/config/x86_64/chromiumos-x86_64.flavour.config
+++ b/chromeos/config/x86_64/chromiumos-x86_64.flavour.config
@@ -2,6 +2,8 @@
# Config options generated by splitconfig
#
CONFIG_ACERHDF=m
+CONFIG_AL3010=m
+CONFIG_AL3320A=m
CONFIG_B43=m
CONFIG_B43_BCMA=y
CONFIG_B43_BCMA_PIO=y
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index ca89b26..57a2a7e 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -40,6 +40,16 @@ config AL3320A
To compile this driver as a module, choose M here: the
module will be called al3320a.
+config AL3010
+ tristate "AL3010 ambient light sensor"
+ depends on I2C
+ help
+ Say Y here if you want to build a driver for the Dyna Image AL3010
+ ambient light sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called al3010.
+
config APDS9300
tristate "APDS9300 ambient light sensor"
depends on I2C
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index 5df1118..3f615d7 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -5,6 +5,7 @@
# When adding new entries keep the list in alphabetical order
obj-$(CONFIG_ACPI_ALS) += acpi-als.o
obj-$(CONFIG_ADJD_S311) += adjd_s311.o
+obj-$(CONFIG_AL3010) += al3010.o
obj-$(CONFIG_AL3320A) += al3320a.o
obj-$(CONFIG_APDS9300) += apds9300.o
obj-$(CONFIG_APDS9960) += apds9960.o
diff --git a/drivers/iio/light/al3010.c b/drivers/iio/light/al3010.c
new file mode 100644
index 0000000..2df425b
--- /dev/null
+++ b/drivers/iio/light/al3010.c
@@ -0,0 +1,301 @@
+/*
+ * AL3010 - Dyna Image Ambient Light Sensor
+ *
+ * Copyright (C) 2016 Dyna-Image Corp.
+ *
+ * This software is licedsed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * Note about the original authors:
+ *
+ * This driver is based on the original driver for AL3320A that was distributed
+ * by Intel Corporation.
+ * The following is part of the header found in that file
+ *
+ * >> AL3320A - Dyna Image Ambient Light Sensor
+ *
+ * >> Copyright (c) 2014, Intel Corporation.
+ *
+ * >> This file is subject to the terms and conditions of version 2 of
+ * >> the GNU General Public License. See the file COPYING in the main
+ * >> directory of this archive for more details.
+ *
+ * >> IIO driver for AL3010 (7-bit I2C slave address 0x1C).
+ *
+ * >> TODO: interrupt support, thresholds
+ *
+ * >> Author:Daniel Baluta <daniel.baluta@xxxxxxxxx>
+ *
+ * The kernel version is 4.4
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define AL3010_DRV_NAME "al3010"
+
+#define AL3010_REG_SYSTEM 0x00
+#define AL3010_REG_CONFIG 0x10
+#define AL3010_REG_DATA_LOW 0x0c
+
+#define AL3010_GAIN_MASK (BIT(6) | BIT(5) | BIT(4))
+#define AL3010_GAIN_SHIFT 4
+
+#define AL3010_CONFIG_DISABLE 0x00
+#define AL3010_CONFIG_ENABLE 0x01
+
+#define AL3010_SCALE_AVAILABLE "1.1872 0.2968 0.0742 0.0186"
+
+enum al3010_range {
+ AL3010_RANGE_1, /* 77806 lx */
+ AL3010_RANGE_2, /* 19452 lx */
+ AL3010_RANGE_3, /* 4863 lx */
+ AL3010_RANGE_4 /* 1216 lx */
+};
+
+static const int al3010_scales[][2] = {
+ {0, 1187200}, {0, 296800}, {0, 74200}, {0, 18600}
+};
+
+struct al3010_data {
+ struct i2c_client *client;
+};
+
+static const struct iio_chan_spec al3010_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ }
+};
+
+static int al3010_set_gain(struct al3010_data *data, int gain)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, AL3010_REG_CONFIG,
+ (gain<<AL3010_GAIN_SHIFT)&AL3010_GAIN_MASK);
+
+ return ret;
+}
+
+static int al3010_set_mode(struct al3010_data *data, int mode)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, AL3010_REG_SYSTEM, mode);
+
+ return ret;
+}
+
+static int al3010_get_mode(struct al3010_data *data)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, AL3010_REG_SYSTEM);
+
+ return ret;
+}
+
+static int al3010_get_adc_value(struct al3010_data *data)
+{
+ int ret;
+
+ ret = i2c_smbus_read_word_data(data->client, AL3010_REG_DATA_LOW);
+
+ return ret;
+}
+
+static int al3010_get_lux(struct al3010_data *data)
+{
+ int ret;
+ long int ret64;
+
+ ret = al3010_get_adc_value(data);
+ ret64 = ret;
+ ret64 = (ret64 * 74200) / 1000000;
+ ret = ret64;
+
+ return ret;
+}
+
+/* lux */
+static ssize_t al3010_show_lux(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct al3010_data *data = iio_priv(dev_to_iio_dev(dev));
+ int ret;
+
+ /* No LUX data if not operational */
+ if (al3010_get_mode(data) != AL3010_CONFIG_ENABLE)
+ return -EBUSY;
+
+ ret = al3010_get_lux(data);
+
+ return sprintf(buf, "%d\n", ret);
+}
+
+static IIO_CONST_ATTR(in_illuminance_scale_available, AL3010_SCALE_AVAILABLE);
+
+static DEVICE_ATTR(illuminance0_input, S_IRUGO, al3010_show_lux, NULL);
+
+static struct attribute *al3010_attributes[] = {
+ &dev_attr_illuminance0_input.attr,
+ &iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group al3010_attribute_group = {
+ .attrs = al3010_attributes,
+};
+
+static int al3010_init(struct al3010_data *data)
+{
+ int err = 0;
+
+ err = al3010_set_mode(data, AL3010_CONFIG_ENABLE);
+ if (err) {
+ dev_err(&data->client->dev,
+ "%s: al3010_set_mode returned error %d\n",
+ __func__, err);
+ return err;
+ }
+
+ /*
+ * set sensor range to 4863 lux.
+ * (If panel luminousness is 10% , the range of pad is 0 ~ 48630 lux.)
+ */
+ err = al3010_set_gain(data, AL3010_RANGE_3);
+ if (err) {
+ dev_err(&data->client->dev,
+ "%s: al3010_set_range returned error %d\n",
+ __func__, err);
+ return err;
+ }
+
+ return 0;
+}
+
+static int al3010_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ struct al3010_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ /*
+ * ALS ADC value is stored in two adjacent registers:
+ * - low byte of output is stored at AL3320A_REG_DATA_LOW
+ * - high byte of output is stored at AL3320A_REG_DATA_LOW + 1
+ */
+ ret = i2c_smbus_read_word_data(data->client,
+ AL3010_REG_DATA_LOW);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ ret = i2c_smbus_read_byte_data(data->client,
+ AL3010_REG_CONFIG);
+ if (ret < 0)
+ return ret;
+
+ ret = (ret & AL3010_GAIN_MASK) >> AL3010_GAIN_SHIFT;
+ *val = al3010_scales[ret][0];
+ *val2 = al3010_scales[ret][1];
+
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ return -EINVAL;
+}
+
+static int al3010_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val,
+ int val2, long mask)
+{
+ struct al3010_data *data = iio_priv(indio_dev);
+ int i;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ for (i = 0; i < ARRAY_SIZE(al3010_scales); i++) {
+ if (val == al3010_scales[i][0] &&
+ val2 == al3010_scales[i][1])
+ return al3010_set_gain(data, i);
+ }
+ break;
+ }
+ return -EINVAL;
+}
+
+static const struct iio_info al3010_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = al3010_read_raw,
+ .write_raw = al3010_write_raw,
+ .attrs = &al3010_attribute_group,
+};
+
+static int al3010_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct al3010_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &al3010_info;
+ indio_dev->name = AL3010_DRV_NAME;
+ indio_dev->channels = al3010_channels;
+ indio_dev->num_channels = ARRAY_SIZE(al3010_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = al3010_init(data);
+ if (ret < 0) {
+ dev_err(&client->dev, "al3010 chip init failed\n");
+ return ret;
+ }
+
+ return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+static int al3010_remove(struct i2c_client *client)
+{
+ return i2c_smbus_write_byte_data(client, AL3010_REG_SYSTEM, 0x00);
+}
+
+static const struct i2c_device_id al3010_id[] = {
+ {"al3010", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, al3010_id);
+
+static struct i2c_driver al3010_driver = {
+ .driver = {
+ .name = AL3010_DRV_NAME,
+ },
+ .probe = al3010_probe,
+ .remove = al3010_remove,
+ .id_table = al3010_id,
+};
+
+module_i2c_driver(al3010_driver);
+
+MODULE_AUTHOR("Rocky Hsiao <rocky.hsiao@xxxxxxxxxxxxxx");
+MODULE_DESCRIPTION("AL3010 Ambient Light Sensor driver");
+MODULE_LICENSE("GPL v2");
+
diff --git a/drivers/iio/light/al3320a.c b/drivers/iio/light/al3320a.c
index 6aac651..4212772 100644
--- a/drivers/iio/light/al3320a.c
+++ b/drivers/iio/light/al3320a.c
@@ -1,16 +1,32 @@
/*
* AL3320A - Dyna Image Ambient Light Sensor
*
- * Copyright (c) 2014, Intel Corporation.
+ * Copyright (C) 2016 Dyna Image Corp.
*
- * This file is subject to the terms and conditions of version 2 of
- * the GNU General Public License. See the file COPYING in the main
- * directory of this archive for more details.
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
*
- * IIO driver for AL3320A (7-bit I2C slave address 0x1C).
+ * 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: interrupt support, thresholds
+ * Note about the original authors:
*
+ * >> Copyright (c) 2014, Intel Corporation.
+ *
+ * >> This file is subject to the terms and conditions of version 2 of
+ * >> the GNU General Public License. See the file COPYING in the main
+ * >> directory of this archive for more details.
+ *
+ * >> IIO driver for AL3320A (7-bit I2C slave address 0x1C).
+ *
+ * >> TODO: interrupt support, thresholds
+ *
+ * >> Author:Daniel Baluta <daniel.baluta@xxxxxxxxx>
+ *
+ * The kernel version is 4.4
*/
#include <linux/module.h>
@@ -72,9 +88,47 @@ static const struct iio_chan_spec al3320a_channels[] = {
}
};
+static int al3320a_get_adc_value(struct al3320a_data *data)
+{
+ int val;
+
+ val = i2c_smbus_read_word_data(data->client, AL3320A_REG_DATA_LOW);
+
+ return val;
+}
+
+static int al3320a_get_lux(struct al3320a_data *data)
+{
+ int ret;
+ long ret64;
+
+ ret = al3320a_get_adc_value(data);
+ ret64 = ret;
+ ret64 = (ret64 * 32000) / 1000000;
+ ret = ret64;
+
+ return ret;
+}
+
+static ssize_t al3320a_lux_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct al3320a_data *data = iio_priv(dev_to_iio_dev(dev));
+ int val;
+
+ val = al3320a_get_lux(data);
+
+ return sprintf(buf, "%d\n", val);
+}
+
+static IIO_DEVICE_ATTR(illuminance0_input, S_IRUGO,
+ al3320a_lux_show, NULL, 0);
+
static IIO_CONST_ATTR(in_illuminance_scale_available, AL3320A_SCALE_AVAILABLE);
static struct attribute *al3320a_attributes[] = {
+ &iio_dev_attr_illuminance0_input.dev_attr.attr,
&iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
NULL,
};
@@ -125,8 +179,8 @@ static int al3320a_read_raw(struct iio_dev *indio_dev,
* - low byte of output is stored at AL3320A_REG_DATA_LOW
* - high byte of output is stored at AL3320A_REG_DATA_LOW + 1
*/
- ret = i2c_smbus_read_word_data(data->client,
- AL3320A_REG_DATA_LOW);
+ ret = al3320a_get_adc_value(data);
+
if (ret < 0)
return ret;
*val = ret;
@@ -201,6 +255,7 @@ static int al3320a_probe(struct i2c_client *client,
dev_err(&client->dev, "al3320a chip init failed\n");
return ret;
}
+
return devm_iio_device_register(&client->dev, indio_dev);
}
@@ -227,6 +282,6 @@ static struct i2c_driver al3320a_driver = {
module_i2c_driver(al3320a_driver);
-MODULE_AUTHOR("Daniel Baluta <daniel.baluta@xxxxxxxxx>");
+MODULE_AUTHOR("Rocky Hsiao <rocky.hsiao@xxxxxxxxxxxxxx>");
MODULE_DESCRIPTION("AL3320A Ambient Light Sensor driver");
MODULE_LICENSE("GPL v2");
--
2.1.2