#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
-#include <linux/i2c-sensor.h>
+#include <linux/mutex.h>
/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
-static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
/* Insmod parameters */
-SENSORS_INSMOD_1(pcf8591);
+I2C_CLIENT_INSMOD_1(pcf8591);
static int input_mode;
module_param(input_mode, int, 0);
struct pcf8591_data {
struct i2c_client client;
- struct semaphore update_lock;
+ struct mutex update_lock;
u8 control;
u8 aout;
/* This is the driver that will be inserted */
static struct i2c_driver pcf8591_driver = {
- .owner = THIS_MODULE,
- .name = "pcf8591",
+ .driver = {
+ .name = "pcf8591",
+ },
.id = I2C_DRIVERID_PCF8591,
- .flags = I2C_DF_NOTIFY,
.attach_adapter = pcf8591_attach_adapter,
.detach_client = pcf8591_detach_client,
};
-static int pcf8591_id;
-
/* following are the sysfs callback functions */
#define show_in_channel(channel) \
-static ssize_t show_in##channel##_input(struct device *dev, char *buf) \
+static ssize_t show_in##channel##_input(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
return sprintf(buf, "%d\n", pcf8591_read_channel(dev, channel));\
} \
show_in_channel(2);
show_in_channel(3);
-static ssize_t show_out0_ouput(struct device *dev, char *buf)
+static ssize_t show_out0_ouput(struct device *dev, struct device_attribute *attr, char *buf)
{
struct pcf8591_data *data = i2c_get_clientdata(to_i2c_client(dev));
return sprintf(buf, "%d\n", data->aout * 10);
}
-static ssize_t set_out0_output(struct device *dev, const char *buf, size_t count)
+static ssize_t set_out0_output(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
unsigned int value;
struct i2c_client *client = to_i2c_client(dev);
static DEVICE_ATTR(out0_output, S_IWUSR | S_IRUGO,
show_out0_ouput, set_out0_output);
-static ssize_t show_out0_enable(struct device *dev, char *buf)
+static ssize_t show_out0_enable(struct device *dev, struct device_attribute *attr, char *buf)
{
struct pcf8591_data *data = i2c_get_clientdata(to_i2c_client(dev));
return sprintf(buf, "%u\n", !(!(data->control & PCF8591_CONTROL_AOEF)));
}
-static ssize_t set_out0_enable(struct device *dev, const char *buf, size_t count)
+static ssize_t set_out0_enable(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct pcf8591_data *data = i2c_get_clientdata(client);
- if (simple_strtoul(buf, NULL, 10))
+ unsigned long val = simple_strtoul(buf, NULL, 10);
+
+ mutex_lock(&data->update_lock);
+ if (val)
data->control |= PCF8591_CONTROL_AOEF;
else
data->control &= ~PCF8591_CONTROL_AOEF;
i2c_smbus_write_byte(client, data->control);
+ mutex_unlock(&data->update_lock);
return count;
}
static DEVICE_ATTR(out0_enable, S_IWUSR | S_IRUGO,
show_out0_enable, set_out0_enable);
+static struct attribute *pcf8591_attributes[] = {
+ &dev_attr_out0_enable.attr,
+ &dev_attr_out0_output.attr,
+ &dev_attr_in0_input.attr,
+ &dev_attr_in1_input.attr,
+ NULL
+};
+
+static const struct attribute_group pcf8591_attr_group = {
+ .attrs = pcf8591_attributes,
+};
+
+static struct attribute *pcf8591_attributes_opt[] = {
+ &dev_attr_in2_input.attr,
+ &dev_attr_in3_input.attr,
+ NULL
+};
+
+static const struct attribute_group pcf8591_attr_group_opt = {
+ .attrs = pcf8591_attributes_opt,
+};
+
/*
* Real code
*/
static int pcf8591_attach_adapter(struct i2c_adapter *adapter)
{
- return i2c_detect(adapter, &addr_data, pcf8591_detect);
+ return i2c_probe(adapter, &addr_data, pcf8591_detect);
}
-/* This function is called by i2c_detect */
-int pcf8591_detect(struct i2c_adapter *adapter, int address, int kind)
+/* This function is called by i2c_probe */
+static int pcf8591_detect(struct i2c_adapter *adapter, int address, int kind)
{
struct i2c_client *new_client;
struct pcf8591_data *data;
/* OK. For now, we presume we have a valid client. We now create the
client structure, even though we cannot fill it completely yet. */
- if (!(data = kmalloc(sizeof(struct pcf8591_data), GFP_KERNEL))) {
+ if (!(data = kzalloc(sizeof(struct pcf8591_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
- memset(data, 0, sizeof(struct pcf8591_data));
new_client = &data->client;
i2c_set_clientdata(new_client, data);
/* Fill in the remaining client fields and put it into the global
list */
strlcpy(new_client->name, "pcf8591", I2C_NAME_SIZE);
-
- new_client->id = pcf8591_id++;
- init_MUTEX(&data->update_lock);
+ mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
pcf8591_init_client(new_client);
/* Register sysfs hooks */
- device_create_file(&new_client->dev, &dev_attr_out0_enable);
- device_create_file(&new_client->dev, &dev_attr_out0_output);
- device_create_file(&new_client->dev, &dev_attr_in0_input);
- device_create_file(&new_client->dev, &dev_attr_in1_input);
+ err = sysfs_create_group(&new_client->dev.kobj, &pcf8591_attr_group);
+ if (err)
+ goto exit_detach;
/* Register input2 if not in "two differential inputs" mode */
- if (input_mode != 3 )
- device_create_file(&new_client->dev, &dev_attr_in2_input);
-
+ if (input_mode != 3) {
+ if ((err = device_create_file(&new_client->dev,
+ &dev_attr_in2_input)))
+ goto exit_sysfs_remove;
+ }
+
/* Register input3 only in "four single ended inputs" mode */
- if (input_mode == 0)
- device_create_file(&new_client->dev, &dev_attr_in3_input);
-
+ if (input_mode == 0) {
+ if ((err = device_create_file(&new_client->dev,
+ &dev_attr_in3_input)))
+ goto exit_sysfs_remove;
+ }
+
return 0;
-
- /* OK, this is not exactly good programming practice, usually. But it is
- very code-efficient in this case. */
+exit_sysfs_remove:
+ sysfs_remove_group(&new_client->dev.kobj, &pcf8591_attr_group_opt);
+ sysfs_remove_group(&new_client->dev.kobj, &pcf8591_attr_group);
+exit_detach:
+ i2c_detach_client(new_client);
exit_kfree:
kfree(data);
exit:
{
int err;
- if ((err = i2c_detach_client(client))) {
- dev_err(&client->dev,
- "Client deregistration failed, client not detached.\n");
+ sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group_opt);
+ sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group);
+
+ if ((err = i2c_detach_client(client)))
return err;
- }
kfree(i2c_get_clientdata(client));
return 0;
struct i2c_client *client = to_i2c_client(dev);
struct pcf8591_data *data = i2c_get_clientdata(client);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
if ((data->control & PCF8591_CONTROL_AICH_MASK) != channel) {
data->control = (data->control & ~PCF8591_CONTROL_AICH_MASK)
}
value = i2c_smbus_read_byte(client);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
if ((channel == 2 && input_mode == 2) ||
(channel != 3 && (input_mode == 1 || input_mode == 3)))
git://git.onelab.eu / linux-2.6.git / blobdiff