Gah, I forgot the I2C dependency as well. Sorry for the silly errors. > Signed-off-by: Jonathan Cameron <[email protected]> > > --- > Minimal changes made. Untested due to lack of hardware. > All comments welcome. > > illuminance is already documented as part of the class. > operating mode and power state are both as per the original > driver. I can't find any documentation for them, but if people > want it I can probably figure out what they are from > the data sheet. > > Might be worth dropping the power state control and moving > over to runtime pm but that is definitely the topic for another > patch. > > Does anyone want a patch without using Git's move functionality? > > Have copied all the users Jean knows about, but please cc any other > users as this does involve a change to the userspace interface. > > Applies on 2.6.31-rc3 with the ALS patches > http://patchwork.kernel.org/patch/49153/ > > drivers/als/Kconfig | 14 ++++++ > drivers/als/Makefile | 2 + > drivers/{i2c/chips => als}/tsl2550.c | 73 ++++++++++++++++++++++++++++++--- > 3 files changed, 82 insertions(+), 7 deletions(-) > > diff --git a/drivers/als/Kconfig b/drivers/als/Kconfig > index 200c52b..0c5dbb2 100644 > --- a/drivers/als/Kconfig > +++ b/drivers/als/Kconfig > @@ -8,3 +8,17 @@ menuconfig ALS > This framework provides a generic sysfs I/F for Ambient Light > Sensor devices. > If you want this support, you should say Y or M here. > + > +if ALS > + > +config ALS_TSL2550 > + tristate "Taos TSL2550 ambient light sensor" > + depends on EXPERIMENTAL > + help > + If you say yes here you get support for the Taos TSL2550 > + ambient light sensor. > + > + This driver can also be built as a module. If so, the module > + will be called tsl2550. > + > +endif #ALS > diff --git a/drivers/als/Makefile b/drivers/als/Makefile > index a527197..7be5631 100644 > --- a/drivers/als/Makefile > +++ b/drivers/als/Makefile > @@ -3,3 +3,5 @@ > # > > obj-$(CONFIG_ALS) += als_sys.o > + > +obj-$(CONFIG_ALS_TSL2550) += tsl2550.o > \ No newline at end of file > diff --git a/drivers/i2c/chips/tsl2550.c b/drivers/als/tsl2550.c > similarity index 87% > rename from drivers/i2c/chips/tsl2550.c > rename to drivers/als/tsl2550.c > index aa96bd2..6c11695 100644 > --- a/drivers/i2c/chips/tsl2550.c > +++ b/drivers/als/tsl2550.c > @@ -24,9 +24,12 @@ > #include <linux/slab.h> > #include <linux/i2c.h> > #include <linux/mutex.h> > +#include <linux/err.h> > +#include <linux/idr.h> > +#include <linux/als_sys.h> > > #define TSL2550_DRV_NAME "tsl2550" > -#define DRIVER_VERSION "1.2" > +#define DRIVER_VERSION "2" > > /* > * Defines > @@ -44,8 +47,10 @@ > */ > > struct tsl2550_data { > + struct device *classdev; > struct i2c_client *client; > struct mutex update_lock; > + unsigned int id; > > unsigned int power_state : 1; > unsigned int operating_mode : 1; > @@ -60,9 +65,41 @@ static const u8 TSL2550_MODE_RANGE[2] = { > }; > > /* > + * IDR to assign each registered device a unique id > + */ > +static DEFINE_IDR(tsl2550_idr); > +static DEFINE_SPINLOCK(tsl2550_idr_lock); > +#define TSL2550_DEV_MAX 9 > + > +/* > * Management functions > */ > > +static int tsl2550_get_id(void) > +{ > + int ret, val; > + > +idr_again: > + if (unlikely(idr_pre_get(&tsl2550_idr, GFP_KERNEL) == 0)) > + return -ENOMEM; > + spin_lock(&tsl2550_idr_lock); > + ret = idr_get_new(&tsl2550_idr, NULL, &val); > + if (unlikely(ret == -EAGAIN)) > + goto idr_again; > + else if (unlikely(ret)) > + return ret; > + if (val > TSL2550_DEV_MAX) > + return -ENOMEM; > + return val; > +} > + > +static void tsl2550_free_id(int val) > +{ > + spin_lock(&tsl2550_idr_lock); > + idr_remove(&tsl2550_idr, val); > + spin_unlock(&tsl2550_idr_lock); > +} > + > static int tsl2550_set_operating_mode(struct i2c_client *client, int mode) > { > struct tsl2550_data *data = i2c_get_clientdata(client); > @@ -296,13 +333,13 @@ static ssize_t tsl2550_show_lux1_input(struct device > *dev, > return ret; > } > > -static DEVICE_ATTR(lux1_input, S_IRUGO, > +static DEVICE_ATTR(illuminance, S_IRUGO, > tsl2550_show_lux1_input, NULL); > > static struct attribute *tsl2550_attributes[] = { > &dev_attr_power_state.attr, > &dev_attr_operating_mode.attr, > - &dev_attr_lux1_input.attr, > + &dev_attr_illuminance.attr, > NULL > }; > > @@ -350,6 +387,7 @@ static int __devinit tsl2550_probe(struct i2c_client > *client, > struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); > struct tsl2550_data *data; > int *opmode, err = 0; > + char name[9]; > > if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_BYTE > | I2C_FUNC_SMBUS_READ_BYTE_DATA)) { > @@ -387,15 +425,31 @@ static int __devinit tsl2550_probe(struct i2c_client > *client, > if (err) > goto exit_kfree; > > + data->id = tsl2550_get_id(); > + if (data->id < 0) { > + err = data->id; > + goto exit_kfree; > + } > + sprintf(name, "tsl2550%d", data->id); > /* Register sysfs hooks */ > - err = sysfs_create_group(&client->dev.kobj, &tsl2550_attr_group); > + data->classdev = als_device_register(&client->dev, name); > + if (IS_ERR(data->classdev)) { > + err = PTR_ERR(data->classdev); > + goto exit_free_id; > + } > + > + err = sysfs_create_group(&data->classdev->kobj, &tsl2550_attr_group); > if (err) > - goto exit_kfree; > + goto exit_unreg; > > dev_info(&client->dev, "support ver. %s enabled\n", DRIVER_VERSION); > > return 0; > > +exit_unreg: > + als_device_unregister(data->classdev); > +exit_free_id: > + tsl2550_free_id(data->id); > exit_kfree: > kfree(data); > exit: > @@ -404,12 +458,17 @@ exit: > > static int __devexit tsl2550_remove(struct i2c_client *client) > { > - sysfs_remove_group(&client->dev.kobj, &tsl2550_attr_group); > + struct tsl2550_data *data = i2c_get_clientdata(client); > + > + sysfs_remove_group(&data->classdev->kobj, &tsl2550_attr_group); > + als_device_unregister(data->classdev); > > /* Power down the device */ > tsl2550_set_power_state(client, 0); > > - kfree(i2c_get_clientdata(client)); > + tsl2550_free_id(data->id); > + > + kfree(data); > > return 0; > }
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