Date:	Mon, 28 Sep 2015 13:28:18 +0200 (CEST)
From:	Peter Meerwald <pmeerw@...erw.net>
To:	Suresh Rajashekara <sureshraj@...gle.com>
cc:	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] CHROMIUM: iio: Add Dyna-Image AP3223 ambient light and
 proximity driver


> Minimal implementation. This is based on the driver provided by
> the vendor (which wasn't in the IIO framework). Authors of the
> driver from the vendor included
> * John Huang <john.huang@...a-image.com>
> * Templeton Tsai <templeton.tsai@...a-image.com>
> * Vic Lee <Vic_Lee@...s.com>

some comments below, the driver doesn't look finished yet :)

link to datasheet missing
 
> Signed-off-by: Suresh Rajashekara <sureshraj@...gle.com>
> ---
>  .../devicetree/bindings/iio/light/ap3223.txt       |  18 +
>  .../devicetree/bindings/vendor-prefixes.txt        |   1 +
>  drivers/iio/light/Kconfig                          |  10 +
>  drivers/iio/light/Makefile                         |   1 +
>  drivers/iio/light/ap3223.c                         | 394 +++++++++++++++++++++
>  drivers/iio/light/ap3223.h                         | 227 ++++++++++++
>  6 files changed, 651 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/light/ap3223.txt
>  create mode 100644 drivers/iio/light/ap3223.c
>  create mode 100644 drivers/iio/light/ap3223.h
> 
> diff --git a/Documentation/devicetree/bindings/iio/light/ap3223.txt b/Documentation/devicetree/bindings/iio/light/ap3223.txt
> new file mode 100644
> index 0000000..b255d27
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/light/ap3223.txt
> @@ -0,0 +1,18 @@
> +* Dyna Image AP3223 ambient light sensor and proximity sensor
> +
> +http://www.dyna-image.com/english/product/optical-sensor-detail.php?cpid=2&dpid=8
> +
> +Required properties:
> +
> +  - compatible : should be "dynaimage,ap3223"
> +  - reg : the I2C address of the sensor
> +
> +Example:
> +
> +ap3223@1c {
> +	compatible = "dynaimage,ap3223";
> +	reg = <0x1c>;
> +
> +	pinctrl-0 = <&ap3223_pins>;
> +	pinctrl-names = "default";
> +};
> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
> index 5f20add..704da45 100644
> --- a/Documentation/devicetree/bindings/vendor-prefixes.txt
> +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
> @@ -46,6 +46,7 @@ digilent	Diglent, Inc.
>  dlg	Dialog Semiconductor
>  dlink	D-Link Corporation
>  dmo	Data Modul AG
> +dynaimage	Dyna-Image
>  ebv	EBV Elektronik
>  edt	Emerging Display Technologies
>  elan	Elan Microelectronic Corp.
> diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
> index ae68c64..5255aa2 100644
> --- a/drivers/iio/light/Kconfig
> +++ b/drivers/iio/light/Kconfig
> @@ -27,6 +27,16 @@ config AL3320A
>  	 To compile this driver as a module, choose M here: the
>  	 module will be called al3320a.
>  
> +config AP3223
> +	tristate "AP3223 ambient light and proximity sensor"
> +	depends on I2C
> +	help
> +	 Say Y here if you want to build a driver for the Dyna Image AP3223
> +	 ambient light and proximity sensor.
> +
> +	 To compile this driver as a module, choose M here: the
> +	 module will be called ap3223.
> +
>  config APDS9300
>  	tristate "APDS9300 ambient light sensor"
>  	depends on I2C
> diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
> index b12a516..13a74f9 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-$(CONFIG_ADJD_S311)		+= adjd_s311.o
>  obj-$(CONFIG_AL3320A)		+= al3320a.o
> +obj-$(CONFIG_AP3223)		+= ap3223.o
>  obj-$(CONFIG_APDS9300)		+= apds9300.o
>  obj-$(CONFIG_CM32181)		+= cm32181.o
>  obj-$(CONFIG_CM3232)		+= cm3232.o
> diff --git a/drivers/iio/light/ap3223.c b/drivers/iio/light/ap3223.c
> new file mode 100644
> index 0000000..55bbcdd
> --- /dev/null
> +++ b/drivers/iio/light/ap3223.c
> @@ -0,0 +1,394 @@
> +/*
> + * ap3223.c
> + *
> + * Copyright (C) 2015 Google, Inc.
> + *
> + * 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.
> + *
> + * 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.
> + *
> + * Note about the original authors:
> + *
> + * The driver for AP3223 was originally distributed by dyna image in a
> + * different framework. This driver uses code from that driver and converts
> + * it to iio framework. The non-iio driver from dyna image is not available
> + * online anywhere, so there is no reference for it here. However, that driver
> + * is also GPLv2. The following is part of the header found in that file
> + * (The GPL notice from the original header is removed)
> + *
> + * >> This file is part of the AP3223, AP3212C and AP3216C sensor driver.
> + * >> AP3426 is combined proximity and ambient light sensor.
> + * >> AP3216C is combined proximity, ambient light sensor and IRLED.
> + * >>
> + * >> Contact: John Huang <john.huang@...a-image.com>
> + * >>	       Templeton Tsai <templeton.tsai@...a-image.com>
> + *
> + * Another author initials mentioned in that file was just YC (and no name).
> + *
> + * Not sure for what kernel version the driver from dyna image was written for.
> + * Vic Lee <Vic_Lee@...s.com> made modifications to it to run on 3.14.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/i2c.h>
> +#include <linux/iio/iio.h>
> +#include <linux/iio/sysfs.h>
> +#include <linux/mutex.h>
> +#include <linux/delay.h>
> +#include <linux/interrupt.h>
> +#include <linux/of_gpio.h>
> +#include <linux/timer.h>
> +#include <linux/gpio.h>
> +#include <linux/device.h>
> +
> +#include "ap3223.h"
> +
> +#define AP3223_DRV_NAME "ap3223"
> +
> +struct ap3223_data {
> +	struct i2c_client *client;
> +	u8 reg_cache[AP3223_NUM_CACHABLE_REGS];
> +	int cali;
> +};
> +
> +static u8 ap3223_regs[AP3223_NUM_CACHABLE_REGS] = {

const
use regmap?

> +	0x00, 0x01, 0x02, 0x06, 0x0A,
> +	0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
> +	0x10, 0x14, 0x1A, 0x1B, 0x1C,
> +	0x1D, 0x20, 0x21, 0x22, 0x23,
> +	0x24, 0x25, 0x26, 0x28, 0x29,
> +	0x2A, 0x2B, 0x2C, 0x2D, 0x30,
> +	0x32
> +};
> +
> +static u8 init_reg_config[] = {

ap3223_ prefix
lot of disgusting magic values

> +	0x00, 0x03,
> +	0x10, 0x20,
> +	0X1A, 0xE8,
> +	0x1B, 0x03,
> +	0x1C, 0xD0,
> +	0x1D, 0x07,
> +	0x20, 0x04,
> +	0x21, 0x03,
> +	0x22, 0x01,
> +	0x23, 0x03,
> +	0x25, 0x0B,
> +	0x2A, 0x64,
> +	0x2C, 0xF4,
> +	0x2D, 0x00
> +};
> +
> +static int ap3223_range[] = { 65535, 16383, 4095, 1023 };

const

> +
> +#define FIND_REG_IDX(addr, regs, idx)	{ \

AP3223_ prefix

> +	int i; \
> +	for (i = 0; i < sizeof(ap3223_regs); i++) { \

use ARRAY_SIZE

> +		if (addr == regs[i]) { \
> +			idx = i; \
> +			break; \
> +		} \
> +	} \
> +}
> +
> +#define AP3223_LIGHT_CHANNEL {				\
> +	.type = IIO_LIGHT,				\
> +	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
> +}
> +
> +#define AP3223_PROXIMITY_CHANNEL {			\
> +	.type = IIO_PROXIMITY,				\
> +	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
> +}
> +
> +static const struct iio_chan_spec ap3223_channels[] = {
> +	AP3223_LIGHT_CHANNEL,
> +	AP3223_PROXIMITY_CHANNEL,
> +};
> +
> +static int __ap3223_read_reg(struct i2c_client *client,

prefix

> +			     u32 reg, u8 mask, u8 shift)
> +{
> +	struct ap3223_data *data = iio_priv(i2c_get_clientdata(client));
> +	u8 idx = 0xff;
> +
> +	FIND_REG_IDX(reg, ap3223_regs, idx);

ugly
if reg is not found, we do an out-of-bound access on reg_cache?!

> +
> +	return (data->reg_cache[idx] & mask) >> shift;
> +}
> +
> +static int __ap3223_write_reg(struct i2c_client *client,
> +			      u32 reg, u8 mask, u8 shift, u8 val)
> +{
> +	struct ap3223_data *data = iio_priv(i2c_get_clientdata(client));
> +	int ret = 0;
> +	u8 tmp;
> +	u8 idx = 0xff;
> +
> +	FIND_REG_IDX(reg, ap3223_regs, idx);
> +
> +	if (idx >= sizeof(ap3223_regs))
> +		return -EINVAL;
> +
> +	tmp = data->reg_cache[idx];
> +	tmp &= ~mask;
> +	tmp |= val << shift;
> +
> +	ret = i2c_smbus_write_byte_data(client, reg, tmp);
> +	if (!ret)
> +		data->reg_cache[idx] = tmp;
> +
> +	return ret;
> +}
> +
> +static int ap3223_get_mode(struct i2c_client *client)
> +{
> +	return __ap3223_read_reg(client, AP3223_REG_SYS_CONF,
> +				 AP3223_REG_SYS_CONF_MASK,
> +				 AP3223_REG_SYS_CONF_SHIFT);
> +}
> +
> +static int ap3223_set_mode(struct i2c_client *client, int mode)
> +{
> +	return __ap3223_write_reg(client, AP3223_REG_SYS_CONF,
> +				  AP3223_REG_SYS_CONF_MASK,
> +				  AP3223_REG_SYS_CONF_SHIFT, mode);
> +}
> +
> +static int ap3223_get_range(struct i2c_client *client)
> +{
> +	u8 idx = __ap3223_read_reg(client, AP3223_REG_ALS_CONF,
> +				   AP3223_ALS_RANGE_MASK,
> +				   AP3223_ALS_RANGE_SHIFT);
> +	return ap3223_range[idx];
> +}
> +
> +static int ap3223_set_range(struct i2c_client *client, int range)
> +{
> +	return __ap3223_write_reg(client, AP3223_REG_ALS_CONF,
> +				  AP3223_ALS_RANGE_MASK,
> +				  AP3223_ALS_RANGE_SHIFT, range);
> +}
> +
> +static int ap3223_get_adc_value(struct i2c_client *client)
> +{
> +	unsigned int lsb, msb, val;
> +	unsigned int tmp, range;
> +	struct ap3223_data *data = iio_priv(i2c_get_clientdata(client));
> +
> +	lsb = i2c_smbus_read_byte_data(client, AP3223_REG_ALS_DATA_LOW);

use i2c_smbus_read_word_data() or _swapped()

> +
> +	if (lsb < 0)

lsb is unsigned int?!

> +		return lsb;
> +
> +	msb = i2c_smbus_read_byte_data(client, AP3223_REG_ALS_DATA_HIGH);
> +
> +	if (msb < 0)
> +		return msb;
> +
> +	range = ap3223_get_range(client);
> +
> +	tmp = (((msb << 8) | lsb) * range) >> 16;
> +	tmp = tmp * data->cali / 100;
> +	val = tmp;

what is the purpose of val?

> +
> +	return val;
> +}
> +
> +static int ap3223_get_object(struct i2c_client *client)
> +{
> +	int val;
> +
> +	val = i2c_smbus_read_byte_data(client, AP3223_OBJ_COMMAND);
> +	val &= AP3223_OBJ_MASK;
> +
> +	return val >> AP3223_OBJ_SHIFT;
> +}
> +
> +/* Software Reset */

drop comment, obvious from function name

> +static inline void ap3223_sw_reset(struct i2c_client *client)

drop inline

> +{
> +	i2c_smbus_write_byte_data(client, 0x0, 0x4);

magic values, no retval checking

> +}
> +
> +static int ap3223_init_client(struct i2c_client *client)
> +{
> +	struct ap3223_data *data = iio_priv(i2c_get_clientdata(client));
> +	int i;
> +
> +	dev_dbg(&client->dev, "AP3223 : Initializing Client ..\n");

needed?

> +
> +	/* Read all the registers once to fill the cache.
> +	 * Even if one of the read fails, we consider the init failed */

multi-line comment style

> +	for (i = 0; i < sizeof(ap3223_regs); i++) {

ARRAY_SIZE

> +		int v = i2c_smbus_read_byte_data(client, ap3223_regs[i]);
> +
> +		if (v < 0)
> +			return -ENODEV;
> +
> +		data->reg_cache[i] = v;
> +	}
> +
> +	/* set defaults */
> +	ap3223_set_range(client, AP3223_ALS_RANGE_0);
> +	ap3223_set_mode(data->client, AP3223_SYS_DEV_DOWN);
> +
> +	return 0;
> +}
> +
> +static int ap3223_read_raw(struct iio_dev *indio_dev,
> +			   struct iio_chan_spec const *chan, int *val,
> +			   int *val2, long mask)
> +{
> +	struct ap3223_data *data = iio_priv(indio_dev);
> +
> +	switch (chan->type) {
> +	case IIO_LIGHT:
> +		switch (mask) {
> +		case IIO_CHAN_INFO_RAW:
> +			if (ap3223_get_mode(data->client) ==
> +			    AP3223_SYS_DEV_DOWN) {
> +				dev_err(&indio_dev->dev,
> +					"Please power up first\n");

huh?
isn't the driver responsible to power up?

> +				return -EINVAL;
> +			}
> +			*val = ap3223_get_adc_value(data->client);

error handling?

> +			return IIO_VAL_INT;
> +		}
> +		break;
> +
> +	case IIO_PROXIMITY:
> +		switch (mask) {
> +		case IIO_CHAN_INFO_RAW:
> +			*val = ap3223_get_object(data->client);

error checking?!

> +			dev_info(&data->client->dev,
> +				 "%s\n", *val ? "Object Near" : "Object Far");

no output here please

> +			return IIO_VAL_INT;
> +		}
> +		break;
> +
> +	default:
> +		break;
> +	}
> +	return -EINVAL;
> +}
> +
> +static const struct iio_info ap3223_info = {
> +	.driver_module  = THIS_MODULE,
> +	.read_raw       = ap3223_read_raw,
> +};
> +
> +static void ap3223_init_reg_config(struct i2c_client *client)
> +{
> +	int i;
> +
> +	for (i = 0; i < sizeof(init_reg_config); i += 2) {
> +		__ap3223_write_reg(client, init_reg_config[i], 0xff,
> +					 0, init_reg_config[i + 1]);
> +	}
> +}
> +
> +static int ap3223_init(struct ap3223_data *data)
> +{
> +	struct i2c_client *client = data->client;
> +	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
> +	struct iio_dev *indio_dev = i2c_get_clientdata(data->client);
> +	int err = 0;
> +
> +	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) {
> +		err = -EIO;
> +		goto exit_free_gpio;
> +	}
> +
> +	ap3223_sw_reset(client);
> +
> +	err = ap3223_init_client(client);
> +	if (err)
> +		goto exit_free;
> +
> +	ap3223_init_reg_config(client);

error checking

> +
> +	dev_info(&client->dev, "%s : driver enabled\n", AP3223_DRV_NAME);
> +
> +	return 0;
> +
> +exit_free:
> +	devm_iio_device_free(&client->dev, indio_dev);

no need to call this explicitly

> +
> +exit_free_gpio:
> +	return err;
> +}
> +
> +static int ap3223_probe(struct i2c_client *client,
> +			const struct i2c_device_id *id)
> +{
> +	struct ap3223_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;
> +
> +	data->cali = AP3223_DEFAULT_CAL;
> +
> +	indio_dev->dev.parent = &client->dev;
> +	indio_dev->info = &ap3223_info;
> +	indio_dev->name = AP3223_DRV_NAME;
> +	indio_dev->channels = ap3223_channels;
> +	indio_dev->num_channels = ARRAY_SIZE(ap3223_channels);
> +	indio_dev->modes = INDIO_DIRECT_MODE;
> +
> +	ret = ap3223_init(data);
> +	if (ret < 0) {
> +		dev_err(&client->dev, "ap3223 chip init failed\n");
> +		return ret;
> +	}
> +
> +	return devm_iio_device_register(&client->dev, indio_dev);
> +}
> +
> +static int ap3223_remove(struct i2c_client *client)
> +{
> +	struct iio_dev *indio_dev = i2c_get_clientdata(client);
> +	struct ap3223_data *data = iio_priv(indio_dev);
> +
> +	ap3223_sw_reset(data->client);
> +	ap3223_set_mode(data->client, 0);
> +
> +	devm_iio_device_unregister(&client->dev, indio_dev);
> +	devm_iio_device_free(&client->dev, indio_dev);

don't call these explicitly

> +
> +	return 0;
> +}
> +
> +static const struct i2c_device_id ap3223_id[] = {
> +	{AP3223_DRV_NAME, 0},
> +	{}
> +};
> +MODULE_DEVICE_TABLE(i2c, ap3223_id);
> +
> +static struct i2c_driver ap3223_driver = {
> +	.driver = {
> +		.name = AP3223_DRV_NAME,
> +		.owner = THIS_MODULE,
> +	},
> +	.probe          = ap3223_probe,
> +	.remove         = ap3223_remove,
> +	.id_table       = ap3223_id,
> +};
> +
> +module_i2c_driver(ap3223_driver);
> +
> +MODULE_AUTHOR("Suresh Rajashekara <sureshraj@...gle.com>");
> +MODULE_DESCRIPTION("AP3223 Ambient Light and Proximity Sensor Driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/iio/light/ap3223.h b/drivers/iio/light/ap3223.h
> new file mode 100644
> index 0000000..0cc88e4
> --- /dev/null
> +++ b/drivers/iio/light/ap3223.h
> @@ -0,0 +1,227 @@
> +/*
> + * ap3223.h
> + *
> + * Copyright (C) 2015 Google, Inc.
> + *
> + * 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.
> + *
> + * 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.
> + *
> + * Note about the original authors:
> + *
> + * The driver for AP3223 was originally distributed by dyna image in a
> + * different framework. This driver uses code from that driver and converts
> + * it to iio framework. The non-iio driver from dyna image is not available
> + * online anywhere, so there is no reference for it here. However, that driver
> + * is also GPLv2. The following is part of the header found in that file
> + * (The GPL notice from the original header is removed)
> + *
> + * >> This file is part of the AP3223, AP3212C and AP3216C sensor driver.
> + * >> AP3426 is combined proximity and ambient light sensor.
> + * >> AP3216C is combined proximity, ambient light sensor and IRLED.
> + * >>
> + * >> Contact: John Huang <john.huang@...a-image.com>
> + * >>	       Templeton Tsai <templeton.tsai@...a-image.com>
> + *
> + * Another author initials mentioned in that file was just YC (and no name).
> + *
> + * Not sure for what kernel version the driver from dyna image was written for.
> + * Vic Lee <Vic_Lee@...s.com> made modifications to it to run on 3.14.
> + */
> +
> +#ifndef __AP3223_H__
> +#define __AP3223_H__
> +
> +#include <linux/ioctl.h>

mostly not needed

> +
> +#define AP3223_SUCCESS					0
> +#define AP3223_ERR_I2C					-1
> +#define AP3223_ERR_STATUS				-3
> +#define AP3223_ERR_SETUP_FAILURE			-4
> +#define AP3223_ERR_GETGSENSORDATA			-5
> +#define AP3223_ERR_IDENTIFICATION			-6
> +

extra newline

> +
> +#define AP3223_NUM_CACHABLE_REGS	31
> +
> +/* No adjustment to lux value reading */
> +#define AP3223_DEFAULT_CAL		100
> +
> +/* ap3223 control registers */
> +#define AP3223_REG_SYS_CONF		0x00
> +#define AP3223_REG_SYS_CONF_SHIFT	(0)
> +#define AP3223_REG_SYS_CONF_MASK	0x07
> +
> +#define AP3223_REG_SYS_INTSTATUS	0x01
> +#define AP3223_REG_SYS_INT_SHIFT	(0)
> +#define AP3223_REG_SYS_INT_PS_SHIFT	(1)
> +#define AP3223_REG_SYS_INT_LS_SHIFT	(0)
> +#define AP3223_REG_SYS_INT_MASK		0x03
> +#define AP3223_REG_SYS_INT_PMASK	0x02
> +#define AP3223_REG_SYS_INT_AMASK	0x01
> +
> +#define AP3223_OBJ_COMMAND	0x01
> +#define AP3223_OBJ_MASK		0x10
> +#define AP3223_OBJ_SHIFT	(4)
> +
> +#define AP3223_REG_SYS_INTCTRL	   0x02
> +#define AP3223_REG_SYS_WAITTIME    0x06
> +
> +/* ap3223 data registers */
> +#define AP3223_REG_IR_DATA_LOW		0x0A
> +#define AP3223_REG_IR_DATA_LOW_SHIFT	(0)
> +#define AP3223_REG_IR_DATA_LOW_MASK	0xFF
> +
> +#define AP3223_REG_IR_DATA_HIGH		0x0B
> +#define AP3223_REG_IR_DATA_HIGH_SHIFT	(0)
> +#define AP3223_REG_IR_DATA_HIGH_MASK	0x03
> +
> +#define AP3223_REG_ALS_DATA_LOW    0x0C
> +#define AP3223_REG_ALS_DATA_HIGH   0x0D
> +
> +#define AP3223_REG_PS_DATA_LOW		0x0E
> +#define AP3223_REG_PS_DATA_LOW_SHIFT	(0)
> +#define	AL3223_REG_PS_DATA_LOW_MASK	0xFF
> +#define AP3223_REG_PS_DATA_HIGH		0x0F
> +#define AP3223_REG_PS_DATA_HIGH_SHIFT	(0)
> +#define	AL3223_REG_PS_DATA_HIGH_MASK	0x03
> +
> +#define AP3223_REG_ALS_CONF		   0x10	/*ALS GAIN */
> +
> +#define AP3223_REG_ALS_PERSIS		0x14
> +#define AP3223_REG_ALS_PERSIS_SHIFT	(0)
> +#define AP3223_REG_ALS_PERSIS_MASK	0x3F
> +/* #define AP3223_REG_ALS_CAL		  0x19 */
> +
> +#define AP3223_REG_ALS_THDL_L		0x1A
> +#define AP3223_REG_ALS_THDL_L_SHIFT	(0)
> +#define AP3223_REG_ALS_THDL_L_MASK	0xFF
> +
> +#define AP3223_REG_ALS_THDL_H		0x1B
> +#define AP3223_REG_ALS_THDL_H_SHIFT	(0)
> +#define AP3223_REG_ALS_THDL_H_MASK	0xFF
> +
> +#define AP3223_REG_ALS_THDH_L		0x1C
> +#define AP3223_REG_ALS_THDH_L_SHIFT	(0)
> +#define AP3223_REG_ALS_THDH_L_MASK	0xFF
> +
> +#define AP3223_REG_ALS_THDH_H		0x1D
> +#define AP3223_REG_ALS_THDH_H_SHIFT	(0)
> +#define AP3223_REG_ALS_THDH_H_MASK	0xFF
> +
> +
> +/* ap3223 PS CONFIG registers */
> +#define AP3223_REG_PS_CONF		0x20	/*PS GAIN */
> +#define AP3223_REG_PS_CONF_SHIFT	(2)
> +#define AP3223_REG_PS_CONF_MASK		0x0C
> +
> +#define AP3223_REG_PS_LEDD		0x21	/*PS LED DRIVER */
> +#define AP3223_REG_PS_LEDD_SHIFT	(0)
> +#define AP3223_REG_PS_LEDD_MASK		0x03
> +
> +#define AP3223_REG_PS_IFORM		0x22	/* PS INT Mode */
> +
> +#define AP3223_REG_PS_MEAN		0x23
> +#define AP3223_REG_PS_MEAN_SHIFT	(0)
> +#define AP3223_REG_PS_MEAN_MASK		0x03
> +
> +#define AP3223_REG_PS_SMARTINT	   0x24	/* PS Smart INT for low power */
> +#define AP3223_REG_PS_INTEGR	   0x25
> +#define AP3223_REG_PS_PERSIS	   0x26
> +#define AP3223_REG_PS_PERSIS_SHIFT	(0)
> +#define AP3223_REG_PS_PERSIS_MASK	0x3F
> +#define AP3223_REG_PS_CAL_L		0x28
> +#define AP3223_REG_PS_CAL_L_SHIFT	(0)
> +#define AP3223_REG_PS_CAL_L_MASK	0xFF
> +#define AP3223_REG_PS_CAL_H		0x29
> +#define AP3223_REG_PS_CAL_H_SHIFT	(0)
> +#define AP3223_REG_PS_CAL_H_MASK	0x01
> +
> +#define AP3223_REG_PS_THDL_L		0x2A
> +#define AP3223_REG_PS_THDL_L_SHIFT	(0)
> +#define AP3223_REG_PS_THDL_L_MASK	0xFF
> +
> +#define AP3223_REG_PS_THDL_H		0x2B
> +#define AP3223_REG_PS_THDL_H_SHIFT	(0)
> +#define AP3223_REG_PS_THDL_H_MASK	0x03
> +
> +#define AP3223_REG_PS_THDH_L		0x2C
> +#define AP3223_REG_PS_THDH_L_SHIFT	(0)
> +#define AP3223_REG_PS_THDH_L_MASK	0xFF
> +
> +#define AP3223_REG_PS_THDH_H		0x2D
> +#define AP3223_REG_PS_THDH_H_SHIFT	(0)
> +#define AP3223_REG_PS_THDH_H_MASK	0x03
> +
> +
> +/* SYSTEM MODE (AP3223_REG_SYS_CONF) */
> +#define	AP3223_SYS_DEV_DOWN		0x00
> +#define	AP3223_SYS_ALS_ENABLE		0x01
> +#define	AP3223_SYS_PS_ENABLE		0x02
> +#define	AP3223_SYS_ALS_PS_ENABLE	0x03
> +#define	AP3223_SYS_DEV_RESET		0x04
> +
> +/* INT FLAG BIT MASK */
> +#define	AP3223_SYS_ALS_INT_TRI	   0x01
> +#define	AP3223_SYS_PS_INT_TRI	   0x02
> +#define	AP3223_SYS_PS_INT_OBJ	   0x10
> +#define	AP3223_SYS_PS_INT_IROV	   0x20
> +
> +/* INT CLEAN Mode */
> +#define	AP3223_SYS_ICLEAN_AUTO	   0x00
> +#define	AP3223_SYS_ICLEAN_MANUAL   0x01
> +
> +/* ALS CONFIG */
> +#define AP3223_ALS_RANGE_0	0x00	/* Full range 32768 lux(0.5lux/count) */
> +#define AP3223_ALS_RANGE_1	0x01	/* Full range 8192 lux */
> +#define AP3223_ALS_RANGE_2	0x02	/* Full range 2048 lux */
> +#define AP3223_ALS_RANGE_3	0x03	/* Full range 512 lux */
> +#define AP3223_ALS_RANGE_MASK	0x30
> +#define AP3223_ALS_RANGE_SHIFT	(4)
> +#define AP3223_ALS_PERSIST_MASK	0x0F
> +
> +/* PS CONFIG */
> +#define AP3223_PS_GAIN_1		0x00	/* PS resulation * 1 */
> +#define AP3223_PS_GAIN_2		0x01	/* PS resulation * 2 */
> +#define AP3223_PS_GAIN_4		0x02	/* PS resulation * 4 */
> +#define AP3223_PS_GAIN_8		0x03	/* PS resulation * 8 */
> +#define AP3223_PS_PERSIST_1		0x00
> +#define AP3223_PS_PERSIST_2		0x01
> +#define AP3223_PS_PERSIST_4		0x02
> +#define AP3223_PS_PERSIST_8		0x03
> +
> +/* PS LED Control */
> +#define AP3223_PS_LED_P0		0x00	/* 0 puls */
> +#define AP3223_PS_LED_P1		0x01	/* 1 puls (default) */
> +#define AP3223_PS_LED_P2		0x02	/* 2 puls  */
> +#define AP3223_PS_LED_P3		0x03	/* 3 puls  */
> +#define AP3223_PS_DEIVER_167		0x00	/* 16.7% */
> +#define AP3223_PS_DEIVER_333		0x01	/* 33.3% */
> +#define AP3223_PS_DEIVER_667		0x02	/* 66.7% */
> +#define AP3223_PS_DEIVER_1000		0x03	/* 100% (default) */
> +
> +/* PS MEAN */
> +#define AP3223_PS_MEAN_0		0x00	/* 5ms @2T */
> +#define AP3223_PS_MEAN_1		0x01	/* 9.6ms @2T */
> +#define AP3223_PS_MEAN_2		0x02	/* 14.1ms @2T */
> +#define AP3223_PS_MEAN_3		0x03	/* 18.7ms @2T */
> +
> +#define DISABLE				0x00
> +#define ENABLE				0x01
> +
> +/* PS Engineering Registers */
> +#define AP3223_REG_PS_DC_1		0x30	/* Only in Engineering chip,
> +						couldn't find in datasheet */
> +#define AP3223_REG_PS_DC_1_SHIFT	(0)
> +#define AP3223_REG_PS_DC_1_MASK		0xFF
> +#define AP3223_REG_PS_DC_2		0x32	/* Only in Engineering chip,
> +						couldn't find in datasheet */
> +#define AP3223_REG_PS_DC_2_SHIFT	(0)
> +#define AP3223_REG_PS_DC_2_MASK		0xFF
> +
> +#endif /* __AP3223_H__ */
> 

-- 

Peter Meerwald
+43-664-2444418 (mobile)
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