Daniel Mack wrote: > Hi Jonathan, > > many thanks for your review! You are welcome. > > On Tue, Mar 10, 2009 at 01:11:21PM +0000, Jonathan Cameron wrote: >> I notice that this device is extremely similar to the ISL29004 where only >> differences being with i2c address selection (that one has some pins to >> allow more than one option). Worth rolling support for that device in >> here? > > Well, the I2C address isn't coded in the driver but defined in the > i2c_board_info array of the board support file, so there is no reason > why it shouldn't work. Or are you talking about the names of files and > functions that you would like to see reflecting this? function names and filenames are fine (typically you just pick a random device that the driver supports and name everything after that). I think the only addition would be documentation of the patch and and id in the id table. > >> This device has some interesting interrupt / timing options which will fit >> nicely in the IIO framework. For now the driver sensibly ignores them >> entirely. (if you don't need them, why bother?) > > Right, I don't need them personally, and things are not connected to > the CPU, so I can't test that. I would expect anyone who needs this > functions to add support to the code :) > >>> +The ISL29003 does not have an ID register which could be used to identify >>> +it, so the detection routine will just try to read from the configured I2C >>> +addess and consider the device to be present as soon as it ACKs the >>> +transfer. >> This is a little nasty given the chances of something else sitting on that >> address, but not much else you can do. > > True. > >> Some of the following are acting only as documentation. It's >> a matter of personal preference whether you specify them. > > I defined them to make future feature additions easy ... > >>> +#define ISL29003_REG_COMMAND 0x00 >>> +#define ISL29003_ADC_ENABLED (1 << 7) >>> +#define ISL29003_ADC_PD (1 << 6) >>> +#define ISL29003_TIMING_INT (1 << 5) >>> +#define ISL29003_MODE_SHIFT (2) >>> +#define ISL29003_MODE_MASK (0x3 << ISL29003_MODE_SHIFT) >>> +#define ISL29003_RES_SHIFT (0) >>> +#define ISL29003_RES_MASK (0x3 << ISL29003_RES_SHIFT) > > [...] > >>> +static int __isl29003_write_reg(struct i2c_client *client, >>> + u32 reg, u8 mask, u8 shift, u8 val) >>> +{ >>> + struct isl29003_data *data = i2c_get_clientdata(client); >>> + int ret = 0; >>> + u8 tmp; >>> + >>> + mutex_lock(&data->lock); >>> + >>> + tmp = data->reg_cache[reg]; >>> + tmp &= ~mask; >>> + tmp |= val << shift; >>> + >>> + ret = i2c_smbus_write_byte_data(client, reg, tmp); >> As i2c_smbus_write_byte_data is defined as returning zero on success >> this could simply be, if (!ret). > > Fixed. > >>> +} >>> + >>> +/* power_state */ >>> +static int isl29003_set_power_state(struct i2c_client *client, int state) >>> +{ >>> + int ret; >>> + >>> + ret = __isl29003_write_reg(client, ISL29003_REG_COMMAND, >>> + ISL29003_ADC_ENABLED, 0, state); >> As this is either 0 or less than zero, again if (ret) will suffice. > > Fixed. > >>> + if (ret < 0) >>> + return ret; >>> + >>> + ret = __isl29003_write_reg(client, ISL29003_REG_COMMAND, >>> + ISL29003_ADC_PD, 0, ~state); >> Just return ret hence losing these 2 lines. > > Fixed. > >>> + if (ret < 0) >>> + return ret; >>> + >>> + return 0; >>> +} >>> + >>> +static int isl29003_get_power_state(struct i2c_client *client) >>> +{ >>> + struct isl29003_data *data = i2c_get_clientdata(client); >>> + u8 cmdreg = data->reg_cache[ISL29003_REG_COMMAND]; >>> + return (cmdreg & ISL29003_ADC_ENABLED) && (~cmdreg & ISL29003_ADC_PD); >>> +} >> Unfortunately this chip has gain controlled by combination of the i2c >> accessed registers and an external resitor. I guess this falls >> into the category of things to be fixed in userspace. Perhaps >> some documentation to indicate this issue would help? >> (table 9 of data sheet) > > The resistor does not affect the value read from the register - it's > about integration time only. Or did I get it wrong? My reading of table 9 on the data sheet is that the full scale range is affected by the resistor. This is also described in the bit about calculating lux. > >>> + if ((strict_strtoul(buf, 10, &val) < 0) || (val > 3)) >>> + return -EINVAL; >> See as there are rather a lot of calls like this, why don't >> you consider moving this test into the register write command. >> If the device is powered up then it will get copied to the >> device. If not, just store it in the cache and it will be >> written on resume anyway (assuming my understanding of your >> suspend resume code is right!) > > It's not even necessary to do that - the driver can access all registers > while the PD bit is set. So the only check is to not read sensor data > when this condition is matched. > >>> +static ssize_t isl29003_store_power_state(struct device *dev, >>> + struct device_attribute *attr, >>> + const char *buf, size_t count) >>> +{ >>> + struct i2c_client *client = to_i2c_client(dev); >>> + unsigned long val; >>> + int ret; >>> + if ((strict_strtoul(buf, 10, &val) < 0) || (val > 1)) >>> + return -EINVAL; >>> + >>> + ret = isl29003_set_power_state(client, val); >>> + if (ret < 0) >>> + return ret; >> I'd go with more concise "return ret ? ret : count;" but thats down >> to personal preference. > > Fixed. > >>> + /* read all the registers once to fill the cache. >>> + * if one of the reads fails, we consider the init failed */ >> Why are you caching registers 4-7? They are read only data registers >> and those you use are read on demand anyway. It's not a problem here, >> but worth noting that even the first 2 are not simply read / write >> control registers and hence any caching method has to be very careful >> (there is a interrupt flag in control according to the data sheet.) > > You're right. I changed the cache to only store the first 4 registers > for now. Interrupt handling will need some extra work anyway, so I'll > leave that for now. > >> If we are restoring registers from cache, why are we reading them? >> >>> + for (i = 0; i < ARRAY_SIZE(data->reg_cache); i++) >>> + if (i2c_smbus_read_byte_data(client, i, data->reg_cache[i]) < 0) >>> + return -ENODEV; > > Typo - couldn't test the suspend/resume code yet. Fixed now. > > Please see the patch below. > > Thanks again, > Daniel > > >>From 8ee5021834900f312ff26cd2586c18e99af31a5d Mon Sep 17 00:00:00 2001 > From: Daniel Mack <daniel@xxxxxxxx> > Date: Tue, 10 Mar 2009 16:13:07 +0100 > Subject: [PATCH] Added driver for ISL29003 ambient light sensor > > This patch adds a driver for Intersil's ISL29003 ambient light sensor > device plus some documentation. Inspired by tsl2550.c, a driver for a > similar device. > > It is put to drivers/misc for now until the industrial I/O framework > gets merged. > > Signed-off-by: Daniel Mack <daniel@xxxxxxxx> > --- > New version with Jonathan Cameron's review notes addressed. > > Documentation/misc-devices/isl29003 | 62 +++++ > drivers/misc/Kconfig | 10 + > drivers/misc/Makefile | 1 + > drivers/misc/isl29003.c | 470 +++++++++++++++++++++++++++++++++++ > 4 files changed, 543 insertions(+), 0 deletions(-) > create mode 100644 Documentation/misc-devices/isl29003 > create mode 100644 drivers/misc/isl29003.c > > diff --git a/Documentation/misc-devices/isl29003 b/Documentation/misc-devices/isl29003 > new file mode 100644 > index 0000000..c4ff5f3 > --- /dev/null > +++ b/Documentation/misc-devices/isl29003 > @@ -0,0 +1,62 @@ > +Kernel driver isl29003 > +===================== > + > +Supported chips: > +* Intersil ISL29003 > +Prefix: 'isl29003' > +Addresses scanned: none > +Datasheet: > +http://www.intersil.com/data/fn/fn7464.pdf > + > +Author: Daniel Mack <daniel@xxxxxxxx> > + > + > +Description > +----------- > +The ISL29003 is an integrated light sensor with a 16-bit integrating type > +ADC, I2C user programmable lux range select for optimized counts/lux, and > +I2C multi-function control and monitoring capabilities. The internal ADC > +provides 16-bit resolution while rejecting 50Hz and 60Hz flicker caused by > +artificial light sources. > + > +The driver allows to set the lux range, the bit resolution, the operational > +mode (see below) and the power state of device and can read the current lux > +value, of course. > + > + > +Detection > +--------- > + > +The ISL29003 does not have an ID register which could be used to identify > +it, so the detection routine will just try to read from the configured I2C > +addess and consider the device to be present as soon as it ACKs the > +transfer. > + > + > +Sysfs entries > +------------- > + > +range: > + 0: 0 lux to 1000 lux (default) > + 1: 0 lux to 4000 lux > + 2: 0 lux to 16,000 lux > + 3: 0 lux to 64,000 lux > + > +resolution: > + 0: 2^16 cycles (default) > + 1: 2^12 cycles > + 2: 2^8 cycles > + 3: 2^4 cycles > + > +mode: > + 0: diode1's current (unsigned 16bit) (default) > + 1: diode1's current (unsigned 16bit) > + 2: difference between diodes (l1 - l2, signed 15bit) > + > +power_state: > + 0: device is disabled (default) > + 1: device is enabled > + > +lux (read only): > + returns the value from the last sensor reading > + > diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig > index c64e679..b883b19 100644 > --- a/drivers/misc/Kconfig > +++ b/drivers/misc/Kconfig > @@ -223,6 +223,16 @@ config DELL_LAPTOP > This driver adds support for rfkill and backlight control to Dell > laptops. > > +config ISL29003 > + tristate "Intersil ISL29003 ambient light sensor" > + depends on I2C > + help > + If you say yes here you get support for the Intersil ISL29003 > + ambient light sensor. > + > + This driver can also be built as a module. If so, the module > + will be called isl29003. > + > source "drivers/misc/c2port/Kconfig" > source "drivers/misc/eeprom/Kconfig" > > diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile > index bc11998..7871f05 100644 > --- a/drivers/misc/Makefile > +++ b/drivers/misc/Makefile > @@ -18,5 +18,6 @@ obj-$(CONFIG_KGDB_TESTS) += kgdbts.o > obj-$(CONFIG_SGI_XP) += sgi-xp/ > obj-$(CONFIG_SGI_GRU) += sgi-gru/ > obj-$(CONFIG_HP_ILO) += hpilo.o > +obj-$(CONFIG_ISL29003) += isl29003.o > obj-$(CONFIG_C2PORT) += c2port/ > obj-y += eeprom/ > diff --git a/drivers/misc/isl29003.c b/drivers/misc/isl29003.c > new file mode 100644 > index 0000000..2e2a592 > --- /dev/null > +++ b/drivers/misc/isl29003.c > @@ -0,0 +1,470 @@ > +/* > + * isl29003.c - Linux kernel module for > + * Intersil ISL29003 ambient light sensor > + * > + * See file:Documentation/misc-devices/isl29003 > + * > + * Copyright (c) 2009 Daniel Mack <daniel@xxxxxxxx> > + * > + * Based on code written by > + * Rodolfo Giometti <giometti@xxxxxxxx> > + * Eurotech S.p.A. <info@xxxxxxxxxxx> > + * > + * 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. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, write to the Free Software > + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. > + */ > + > +#include <linux/module.h> > +#include <linux/init.h> > +#include <linux/slab.h> > +#include <linux/i2c.h> > +#include <linux/mutex.h> > +#include <linux/delay.h> > + > +#define ISL29003_DRV_NAME "isl29003" > +#define DRIVER_VERSION "1.0" > + > +#define ISL29003_REG_COMMAND 0x00 > +#define ISL29003_ADC_ENABLED (1 << 7) > +#define ISL29003_ADC_PD (1 << 6) > +#define ISL29003_TIMING_INT (1 << 5) > +#define ISL29003_MODE_SHIFT (2) > +#define ISL29003_MODE_MASK (0x3 << ISL29003_MODE_SHIFT) > +#define ISL29003_RES_SHIFT (0) > +#define ISL29003_RES_MASK (0x3 << ISL29003_RES_SHIFT) > + > +#define ISL29003_REG_CONTROL 0x01 > +#define ISL29003_INT_FLG (1 << 5) > +#define ISL29003_RANGE_SHIFT (2) > +#define ISL29003_RANGE_MASK (0x3 << ISL29003_RANGE_SHIFT) > +#define ISL29003_INT_PERSISTS_SHIFT (0) > +#define ISL29003_INT_PERSISTS_MASK (0xf << ISL29003_INT_PERSISTS_SHIFT) > + > +#define ISL29003_REG_IRQ_THRESH_HI 0x02 > +#define ISL29003_REG_IRQ_THRESH_LO 0x03 > +#define ISL29003_REG_LSB_SENSOR 0x04 > +#define ISL29003_REG_MSB_SENSOR 0x05 > +#define ISL29003_REG_LSB_TIMER 0x06 > +#define ISL29003_REG_MSB_TIMER 0x07 > + > +#define ISL29003_NUM_CACHABLE_REGS 4 > + > +struct isl29003_data { > + struct i2c_client *client; > + struct mutex lock; > + u8 reg_cache[ISL29003_NUM_CACHABLE_REGS]; > +}; > + > +static int gain_range[] = { > + 1000, 4000, 16000, 64000 > +}; > + > +/* > + * register access helpers > + */ > + > +static int __isl29003_read_reg(struct i2c_client *client, > + u32 reg, u8 mask, u8 shift) > +{ > + struct isl29003_data *data = i2c_get_clientdata(client); > + return (data->reg_cache[reg] & mask) >> shift; > +} > + > +static int __isl29003_write_reg(struct i2c_client *client, > + u32 reg, u8 mask, u8 shift, u8 val) > +{ > + struct isl29003_data *data = i2c_get_clientdata(client); > + int ret = 0; > + u8 tmp; > + > + if (reg >= ISL29003_NUM_CACHABLE_REGS) > + return -EINVAL; > + > + mutex_lock(&data->lock); > + > + tmp = data->reg_cache[reg]; > + tmp &= ~mask; > + tmp |= val << shift; > + > + ret = i2c_smbus_write_byte_data(client, reg, tmp); > + if (!ret) > + data->reg_cache[reg] = tmp; > + > + mutex_unlock(&data->lock); > + return ret; > +} > + > +/* > + * internally used functions > + */ > + > +/* range */ > +static int isl29003_get_range(struct i2c_client *client) > +{ > + return __isl29003_read_reg(client, ISL29003_REG_CONTROL, > + ISL29003_RANGE_MASK, ISL29003_RANGE_SHIFT); > +} > + > +static int isl29003_set_range(struct i2c_client *client, int range) > +{ > + return __isl29003_write_reg(client, ISL29003_REG_CONTROL, > + ISL29003_RANGE_MASK, ISL29003_RANGE_SHIFT, range); > +} > + > +/* resolution */ > +static int isl29003_get_resolution(struct i2c_client *client) > +{ > + return __isl29003_read_reg(client, ISL29003_REG_COMMAND, > + ISL29003_RES_MASK, ISL29003_RES_SHIFT); > +} > + > +static int isl29003_set_resolution(struct i2c_client *client, int res) > +{ > + return __isl29003_write_reg(client, ISL29003_REG_COMMAND, > + ISL29003_RES_MASK, ISL29003_RES_SHIFT, res); > +} > + > +/* mode */ > +static int isl29003_get_mode(struct i2c_client *client) > +{ > + return __isl29003_read_reg(client, ISL29003_REG_COMMAND, > + ISL29003_RES_MASK, ISL29003_RES_SHIFT); > +} > + > +static int isl29003_set_mode(struct i2c_client *client, int mode) > +{ > + return __isl29003_write_reg(client, ISL29003_REG_COMMAND, > + ISL29003_RES_MASK, ISL29003_RES_SHIFT, mode); > +} > + > +/* power_state */ > +static int isl29003_set_power_state(struct i2c_client *client, int state) > +{ > + return __isl29003_write_reg(client, ISL29003_REG_COMMAND, > + ISL29003_ADC_ENABLED | ISL29003_ADC_PD, 0, > + state ? ISL29003_ADC_ENABLED : ISL29003_ADC_PD); > +} > + > +static int isl29003_get_power_state(struct i2c_client *client) > +{ > + struct isl29003_data *data = i2c_get_clientdata(client); > + u8 cmdreg = data->reg_cache[ISL29003_REG_COMMAND]; > + return ~cmdreg & ISL29003_ADC_PD; > +} > + > +static int isl29003_get_adc_value(struct i2c_client *client) > +{ > + struct isl29003_data *data = i2c_get_clientdata(client); > + int lsb, msb, range, bitdepth; > + > + mutex_lock(&data->lock); > + lsb = i2c_smbus_read_byte_data(client, ISL29003_REG_LSB_SENSOR); > + > + if (lsb < 0) { > + mutex_unlock(&data->lock); > + return lsb; > + } > + > + msb = i2c_smbus_read_byte_data(client, ISL29003_REG_MSB_SENSOR); > + mutex_unlock(&data->lock); > + > + if (msb < 0) > + return msb; > + > + range = isl29003_get_range(client); > + bitdepth = (4 - isl29003_get_resolution(client)) * 4; > + return (((msb << 8) | lsb) * gain_range[range]) >> bitdepth; > +} > + > +/* > + * sysfs layer > + */ > + > +/* range */ > +static ssize_t isl29003_show_range(struct device *dev, > + struct device_attribute *attr, char *buf) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + return sprintf(buf, "%i\n", isl29003_get_range(client)); > +} > + > +static ssize_t isl29003_store_range(struct device *dev, > + struct device_attribute *attr, > + const char *buf, size_t count) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + unsigned long val; > + int ret; > + > + if ((strict_strtoul(buf, 10, &val) < 0) || (val > 3)) > + return -EINVAL; > + > + ret = isl29003_set_range(client, val); > + if (ret < 0) > + return ret; > + > + return count; > +} > + > +static DEVICE_ATTR(range, S_IWUSR | S_IRUGO, > + isl29003_show_range, isl29003_store_range); > + > + > +/* resolution */ > +static ssize_t isl29003_show_resolution(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + return sprintf(buf, "%d\n", isl29003_get_resolution(client)); > +} > + > +static ssize_t isl29003_store_resolution(struct device *dev, > + struct device_attribute *attr, > + const char *buf, size_t count) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + unsigned long val; > + int ret; > + > + if ((strict_strtoul(buf, 10, &val) < 0) || (val > 3)) > + return -EINVAL; > + > + ret = isl29003_set_resolution(client, val); > + if (ret < 0) > + return ret; > + > + return count; > +} > + > +static DEVICE_ATTR(resolution, S_IWUSR | S_IRUGO, > + isl29003_show_resolution, isl29003_store_resolution); > + > +/* mode */ > +static ssize_t isl29003_show_mode(struct device *dev, > + struct device_attribute *attr, char *buf) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + return sprintf(buf, "%d\n", isl29003_get_mode(client)); > +} > + > +static ssize_t isl29003_store_mode(struct device *dev, > + struct device_attribute *attr, const char *buf, size_t count) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + unsigned long val; > + int ret; > + > + if ((strict_strtoul(buf, 10, &val) < 0) || (val > 2)) > + return -EINVAL; > + > + ret = isl29003_set_mode(client, val); > + if (ret < 0) > + return ret; > + > + return count; > +} > + > +static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO, > + isl29003_show_mode, isl29003_store_mode); > + > + > +/* power state */ > +static ssize_t isl29003_show_power_state(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + return sprintf(buf, "%d\n", isl29003_get_power_state(client)); > +} > + > +static ssize_t isl29003_store_power_state(struct device *dev, > + struct device_attribute *attr, > + const char *buf, size_t count) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + unsigned long val; > + int ret; > + > + if ((strict_strtoul(buf, 10, &val) < 0) || (val > 1)) > + return -EINVAL; > + > + ret = isl29003_set_power_state(client, val); > + return ret ? ret : count; > +} > + > +static DEVICE_ATTR(power_state, S_IWUSR | S_IRUGO, > + isl29003_show_power_state, isl29003_store_power_state); > + > + > +/* lux */ > +static ssize_t isl29003_show_lux(struct device *dev, > + struct device_attribute *attr, char *buf) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + > + /* No LUX data if not operational */ > + if (!isl29003_get_power_state(client)) > + return -EBUSY; > + > + return sprintf(buf, "%d\n", isl29003_get_adc_value(client)); > +} > + > +static DEVICE_ATTR(lux, S_IRUGO, isl29003_show_lux, NULL); > + > +static struct attribute *isl29003_attributes[] = { > + &dev_attr_range.attr, > + &dev_attr_resolution.attr, > + &dev_attr_mode.attr, > + &dev_attr_power_state.attr, > + &dev_attr_lux.attr, > + NULL > +}; > + > +static const struct attribute_group isl29003_attr_group = { > + .attrs = isl29003_attributes, > +}; > + > +static int isl29003_init_client(struct i2c_client *client) > +{ > + struct isl29003_data *data = i2c_get_clientdata(client); > + int i; > + > + /* read all the registers once to fill the cache. > + * if one of the reads fails, we consider the init failed */ > + for (i = 0; i < ARRAY_SIZE(data->reg_cache); i++) { > + int v = i2c_smbus_read_byte_data(client, i); > + if (v < 0) > + return -ENODEV; > + > + data->reg_cache[i] = v; > + } > + > + /* set defaults */ > + isl29003_set_range(client, 0); > + isl29003_set_resolution(client, 0); > + isl29003_set_mode(client, 0); > + isl29003_set_power_state(client, 0); > + > + return 0; > +} > + > +/* > + * I2C layer > + */ > + > +static int __devinit isl29003_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); > + struct isl29003_data *data; > + int err = 0; > + > + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) > + return -EIO; > + > + data = kzalloc(sizeof(struct isl29003_data), GFP_KERNEL); > + if (!data) > + return -ENOMEM; > + > + data->client = client; > + i2c_set_clientdata(client, data); > + mutex_init(&data->lock); > + > + /* initialize the ISL29003 chip */ > + err = isl29003_init_client(client); > + if (err) > + goto exit_kfree; > + > + /* register sysfs hooks */ > + err = sysfs_create_group(&client->dev.kobj, &isl29003_attr_group); > + if (err) > + goto exit_kfree; > + > + dev_info(&client->dev, "driver version %s enabled\n", DRIVER_VERSION); > + return 0; > + > +exit_kfree: > + kfree(data); > + return err; > +} > + > +static int __devexit isl29003_remove(struct i2c_client *client) > +{ > + sysfs_remove_group(&client->dev.kobj, &isl29003_attr_group); > + isl29003_set_power_state(client, 0); > + kfree(i2c_get_clientdata(client)); > + return 0; > +} > + > +#ifdef CONFIG_PM > +static int isl29003_suspend(struct i2c_client *client, pm_message_t mesg) > +{ > + return isl29003_set_power_state(client, 0); > +} > + > +static int isl29003_resume(struct i2c_client *client) > +{ > + int i; > + struct isl29003_data *data = i2c_get_clientdata(client); > + > + /* restore registers from cache */ > + for (i = 0; i < ARRAY_SIZE(data->reg_cache); i++) > + if (!i2c_smbus_write_byte_data(client, i, data->reg_cache[i])) > + return -EIO; > + > + return 0; > +} > + > +#else > +#define isl29003_suspend NULL > +#define isl29003_resume NULL > +#endif /* CONFIG_PM */ > + > +static const struct i2c_device_id isl29003_id[] = { > + { "isl29003", 0 }, > + {} > +}; > +MODULE_DEVICE_TABLE(i2c, isl29003_id); > + > +static struct i2c_driver isl29003_driver = { > + .driver = { > + .name = ISL29003_DRV_NAME, > + .owner = THIS_MODULE, > + }, > + .suspend = isl29003_suspend, > + .resume = isl29003_resume, > + .probe = isl29003_probe, > + .remove = __devexit_p(isl29003_remove), > + .id_table = isl29003_id, > +}; > + > +static int __init isl29003_init(void) > +{ > + return i2c_add_driver(&isl29003_driver); > +} > + > +static void __exit isl29003_exit(void) > +{ > + i2c_del_driver(&isl29003_driver); > +} > + > +MODULE_AUTHOR("Daniel Mack <daniel@xxxxxxxx>"); > +MODULE_DESCRIPTION("ISL29003 ambient light sensor driver"); > +MODULE_LICENSE("GPL v2"); > +MODULE_VERSION(DRIVER_VERSION); > + > +module_init(isl29003_init); > +module_exit(isl29003_exit); > + All looks fine to me. Acked-by: Jonathan Cameron <jic23@xxxxxxxxx> Cheers, Jonathan -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html