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openwrt-owl/target/linux/ixp4xx/patches-2.6.25/010-rtc_isl1208_new_style.p...

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---
drivers/rtc/rtc-isl1208.c | 357 +++++++++++++++++++++-------------------------
1 file changed, 170 insertions(+), 187 deletions(-)
Index: linux-2.6.25-rc6-armeb/drivers/rtc/rtc-isl1208.c
===================================================================
--- linux-2.6.25-rc6-armeb.orig/drivers/rtc/rtc-isl1208.c 2008-03-20 10:26:41.000000000 +1030
+++ linux-2.6.25-rc6-armeb/drivers/rtc/rtc-isl1208.c 2008-03-20 10:26:53.000000000 +1030
@@ -15,16 +15,15 @@
#include <linux/bcd.h>
#include <linux/rtc.h>
-#define DRV_NAME "isl1208"
-#define DRV_VERSION "0.2"
+#define DRV_VERSION "0.3"
/* Register map */
/* rtc section */
#define ISL1208_REG_SC 0x00
#define ISL1208_REG_MN 0x01
#define ISL1208_REG_HR 0x02
-#define ISL1208_REG_HR_MIL (1<<7) /* 24h/12h mode */
-#define ISL1208_REG_HR_PM (1<<5) /* PM/AM bit in 12h mode */
+#define ISL1208_REG_HR_MIL (1<<7) /* 24h/12h mode */
+#define ISL1208_REG_HR_PM (1<<5) /* PM/AM bit in 12h mode */
#define ISL1208_REG_DT 0x03
#define ISL1208_REG_MO 0x04
#define ISL1208_REG_YR 0x05
@@ -33,14 +32,14 @@
/* control/status section */
#define ISL1208_REG_SR 0x07
-#define ISL1208_REG_SR_ARST (1<<7) /* auto reset */
-#define ISL1208_REG_SR_XTOSCB (1<<6) /* crystal oscillator */
-#define ISL1208_REG_SR_WRTC (1<<4) /* write rtc */
-#define ISL1208_REG_SR_ALM (1<<2) /* alarm */
-#define ISL1208_REG_SR_BAT (1<<1) /* battery */
-#define ISL1208_REG_SR_RTCF (1<<0) /* rtc fail */
+#define ISL1208_REG_SR_ARST (1<<7) /* auto reset */
+#define ISL1208_REG_SR_XTOSCB (1<<6) /* crystal oscillator */
+#define ISL1208_REG_SR_WRTC (1<<4) /* write rtc */
+#define ISL1208_REG_SR_ALM (1<<2) /* alarm */
+#define ISL1208_REG_SR_BAT (1<<1) /* battery */
+#define ISL1208_REG_SR_RTCF (1<<0) /* rtc fail */
#define ISL1208_REG_INT 0x08
-#define ISL1208_REG_09 0x09 /* reserved */
+#define ISL1208_REG_09 0x09 /* reserved */
#define ISL1208_REG_ATR 0x0a
#define ISL1208_REG_DTR 0x0b
@@ -58,39 +57,21 @@
#define ISL1208_REG_USR2 0x13
#define ISL1208_USR_SECTION_LEN 2
-/* i2c configuration */
-#define ISL1208_I2C_ADDR 0xde
-
-static const unsigned short normal_i2c[] = {
- ISL1208_I2C_ADDR>>1, I2C_CLIENT_END
-};
-I2C_CLIENT_INSMOD; /* defines addr_data */
-
-static int isl1208_attach_adapter(struct i2c_adapter *adapter);
-static int isl1208_detach_client(struct i2c_client *client);
-
-static struct i2c_driver isl1208_driver = {
- .driver = {
- .name = DRV_NAME,
- },
- .id = I2C_DRIVERID_ISL1208,
- .attach_adapter = &isl1208_attach_adapter,
- .detach_client = &isl1208_detach_client,
-};
+static struct i2c_driver isl1208_driver;
/* block read */
static int
isl1208_i2c_read_regs(struct i2c_client *client, u8 reg, u8 buf[],
- unsigned len)
+ unsigned len)
{
u8 reg_addr[1] = { reg };
struct i2c_msg msgs[2] = {
- { client->addr, client->flags, sizeof(reg_addr), reg_addr },
- { client->addr, client->flags | I2C_M_RD, len, buf }
+ {client->addr, client->flags, sizeof(reg_addr), reg_addr}
+ ,
+ {client->addr, client->flags | I2C_M_RD, len, buf}
};
int ret;
- BUG_ON(len == 0);
BUG_ON(reg > ISL1208_REG_USR2);
BUG_ON(reg + len > ISL1208_REG_USR2 + 1);
@@ -103,15 +84,14 @@
/* block write */
static int
isl1208_i2c_set_regs(struct i2c_client *client, u8 reg, u8 const buf[],
- unsigned len)
+ unsigned len)
{
u8 i2c_buf[ISL1208_REG_USR2 + 2];
struct i2c_msg msgs[1] = {
- { client->addr, client->flags, len + 1, i2c_buf }
+ {client->addr, client->flags, len + 1, i2c_buf}
};
int ret;
- BUG_ON(len == 0);
BUG_ON(reg > ISL1208_REG_USR2);
BUG_ON(reg + len > ISL1208_REG_USR2 + 1);
@@ -125,7 +105,8 @@
}
/* simple check to see wether we have a isl1208 */
-static int isl1208_i2c_validate_client(struct i2c_client *client)
+static int
+isl1208_i2c_validate_client(struct i2c_client *client)
{
u8 regs[ISL1208_RTC_SECTION_LEN] = { 0, };
u8 zero_mask[ISL1208_RTC_SECTION_LEN] = {
@@ -139,24 +120,29 @@
return ret;
for (i = 0; i < ISL1208_RTC_SECTION_LEN; ++i) {
- if (regs[i] & zero_mask[i]) /* check if bits are cleared */
+ if (regs[i] & zero_mask[i]) /* check if bits are cleared */
return -ENODEV;
}
return 0;
}
-static int isl1208_i2c_get_sr(struct i2c_client *client)
+static int
+isl1208_i2c_get_sr(struct i2c_client *client)
{
- return i2c_smbus_read_byte_data(client, ISL1208_REG_SR) == -1 ? -EIO:0;
+ int sr = i2c_smbus_read_byte_data(client, ISL1208_REG_SR);
+ if (sr < 0)
+ return -EIO;
+
+ return sr;
}
-static int isl1208_i2c_get_atr(struct i2c_client *client)
+static int
+isl1208_i2c_get_atr(struct i2c_client *client)
{
int atr = i2c_smbus_read_byte_data(client, ISL1208_REG_ATR);
-
if (atr < 0)
- return -EIO;
+ return atr;
/* The 6bit value in the ATR register controls the load
* capacitance C_load * in steps of 0.25pF
@@ -169,51 +155,54 @@
*
*/
- atr &= 0x3f; /* mask out lsb */
- atr ^= 1<<5; /* invert 6th bit */
- atr += 2*9; /* add offset of 4.5pF; unit[atr] = 0.25pF */
+ atr &= 0x3f; /* mask out lsb */
+ atr ^= 1 << 5; /* invert 6th bit */
+ atr += 2 * 9; /* add offset of 4.5pF; unit[atr] = 0.25pF */
return atr;
}
-static int isl1208_i2c_get_dtr(struct i2c_client *client)
+static int
+isl1208_i2c_get_dtr(struct i2c_client *client)
{
int dtr = i2c_smbus_read_byte_data(client, ISL1208_REG_DTR);
-
if (dtr < 0)
return -EIO;
/* dtr encodes adjustments of {-60,-40,-20,0,20,40,60} ppm */
- dtr = ((dtr & 0x3) * 20) * (dtr & (1<<2) ? -1 : 1);
+ dtr = ((dtr & 0x3) * 20) * (dtr & (1 << 2) ? -1 : 1);
return dtr;
}
-static int isl1208_i2c_get_usr(struct i2c_client *client)
+static int
+isl1208_i2c_get_usr(struct i2c_client *client)
{
u8 buf[ISL1208_USR_SECTION_LEN] = { 0, };
int ret;
- ret = isl1208_i2c_read_regs (client, ISL1208_REG_USR1, buf,
- ISL1208_USR_SECTION_LEN);
+ ret = isl1208_i2c_read_regs(client, ISL1208_REG_USR1, buf,
+ ISL1208_USR_SECTION_LEN);
if (ret < 0)
return ret;
return (buf[1] << 8) | buf[0];
}
-static int isl1208_i2c_set_usr(struct i2c_client *client, u16 usr)
+static int
+isl1208_i2c_set_usr(struct i2c_client *client, u16 usr)
{
u8 buf[ISL1208_USR_SECTION_LEN];
buf[0] = usr & 0xff;
buf[1] = (usr >> 8) & 0xff;
- return isl1208_i2c_set_regs (client, ISL1208_REG_USR1, buf,
- ISL1208_USR_SECTION_LEN);
+ return isl1208_i2c_set_regs(client, ISL1208_REG_USR1, buf,
+ ISL1208_USR_SECTION_LEN);
}
-static int isl1208_rtc_proc(struct device *dev, struct seq_file *seq)
+static int
+isl1208_rtc_proc(struct device *dev, struct seq_file *seq)
{
struct i2c_client *const client = to_i2c_client(dev);
int sr, dtr, atr, usr;
@@ -230,20 +219,19 @@
(sr & ISL1208_REG_SR_ALM) ? " ALM" : "",
(sr & ISL1208_REG_SR_WRTC) ? " WRTC" : "",
(sr & ISL1208_REG_SR_XTOSCB) ? " XTOSCB" : "",
- (sr & ISL1208_REG_SR_ARST) ? " ARST" : "",
- sr);
+ (sr & ISL1208_REG_SR_ARST) ? " ARST" : "", sr);
seq_printf(seq, "batt_status\t: %s\n",
(sr & ISL1208_REG_SR_RTCF) ? "bad" : "okay");
dtr = isl1208_i2c_get_dtr(client);
- if (dtr >= 0 -1)
+ if (dtr >= 0 - 1)
seq_printf(seq, "digital_trim\t: %d ppm\n", dtr);
atr = isl1208_i2c_get_atr(client);
if (atr >= 0)
seq_printf(seq, "analog_trim\t: %d.%.2d pF\n",
- atr>>2, (atr&0x3)*25);
+ atr >> 2, (atr & 0x3) * 25);
usr = isl1208_i2c_get_usr(client);
if (usr >= 0)
@@ -252,9 +240,8 @@
return 0;
}
-
-static int isl1208_i2c_read_time(struct i2c_client *client,
- struct rtc_time *tm)
+static int
+isl1208_i2c_read_time(struct i2c_client *client, struct rtc_time *tm)
{
int sr;
u8 regs[ISL1208_RTC_SECTION_LEN] = { 0, };
@@ -274,27 +261,30 @@
tm->tm_sec = BCD2BIN(regs[ISL1208_REG_SC]);
tm->tm_min = BCD2BIN(regs[ISL1208_REG_MN]);
- { /* HR field has a more complex interpretation */
+
+ /* HR field has a more complex interpretation */
+ {
const u8 _hr = regs[ISL1208_REG_HR];
- if (_hr & ISL1208_REG_HR_MIL) /* 24h format */
+ if (_hr & ISL1208_REG_HR_MIL) /* 24h format */
tm->tm_hour = BCD2BIN(_hr & 0x3f);
- else { // 12h format
+ else {
+ /* 12h format */
tm->tm_hour = BCD2BIN(_hr & 0x1f);
- if (_hr & ISL1208_REG_HR_PM) /* PM flag set */
+ if (_hr & ISL1208_REG_HR_PM) /* PM flag set */
tm->tm_hour += 12;
}
}
tm->tm_mday = BCD2BIN(regs[ISL1208_REG_DT]);
- tm->tm_mon = BCD2BIN(regs[ISL1208_REG_MO]) - 1; /* rtc starts at 1 */
+ tm->tm_mon = BCD2BIN(regs[ISL1208_REG_MO]) - 1; /* rtc starts at 1 */
tm->tm_year = BCD2BIN(regs[ISL1208_REG_YR]) + 100;
tm->tm_wday = BCD2BIN(regs[ISL1208_REG_DW]);
return 0;
}
-static int isl1208_i2c_read_alarm(struct i2c_client *client,
- struct rtc_wkalrm *alarm)
+static int
+isl1208_i2c_read_alarm(struct i2c_client *client, struct rtc_wkalrm *alarm)
{
struct rtc_time *const tm = &alarm->time;
u8 regs[ISL1208_ALARM_SECTION_LEN] = { 0, };
@@ -307,7 +297,7 @@
}
sr = isl1208_i2c_read_regs(client, ISL1208_REG_SCA, regs,
- ISL1208_ALARM_SECTION_LEN);
+ ISL1208_ALARM_SECTION_LEN);
if (sr < 0) {
dev_err(&client->dev, "%s: reading alarm section failed\n",
__func__);
@@ -315,23 +305,25 @@
}
/* MSB of each alarm register is an enable bit */
- tm->tm_sec = BCD2BIN(regs[ISL1208_REG_SCA-ISL1208_REG_SCA] & 0x7f);
- tm->tm_min = BCD2BIN(regs[ISL1208_REG_MNA-ISL1208_REG_SCA] & 0x7f);
- tm->tm_hour = BCD2BIN(regs[ISL1208_REG_HRA-ISL1208_REG_SCA] & 0x3f);
- tm->tm_mday = BCD2BIN(regs[ISL1208_REG_DTA-ISL1208_REG_SCA] & 0x3f);
- tm->tm_mon = BCD2BIN(regs[ISL1208_REG_MOA-ISL1208_REG_SCA] & 0x1f)-1;
- tm->tm_wday = BCD2BIN(regs[ISL1208_REG_DWA-ISL1208_REG_SCA] & 0x03);
+ tm->tm_sec = BCD2BIN(regs[ISL1208_REG_SCA - ISL1208_REG_SCA] & 0x7f);
+ tm->tm_min = BCD2BIN(regs[ISL1208_REG_MNA - ISL1208_REG_SCA] & 0x7f);
+ tm->tm_hour = BCD2BIN(regs[ISL1208_REG_HRA - ISL1208_REG_SCA] & 0x3f);
+ tm->tm_mday = BCD2BIN(regs[ISL1208_REG_DTA - ISL1208_REG_SCA] & 0x3f);
+ tm->tm_mon =
+ BCD2BIN(regs[ISL1208_REG_MOA - ISL1208_REG_SCA] & 0x1f) - 1;
+ tm->tm_wday = BCD2BIN(regs[ISL1208_REG_DWA - ISL1208_REG_SCA] & 0x03);
return 0;
}
-static int isl1208_rtc_read_time(struct device *dev, struct rtc_time *tm)
+static int
+isl1208_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
return isl1208_i2c_read_time(to_i2c_client(dev), tm);
}
-static int isl1208_i2c_set_time(struct i2c_client *client,
- struct rtc_time const *tm)
+static int
+isl1208_i2c_set_time(struct i2c_client *client, struct rtc_time const *tm)
{
int sr;
u8 regs[ISL1208_RTC_SECTION_LEN] = { 0, };
@@ -353,7 +345,7 @@
}
/* set WRTC */
- sr = i2c_smbus_write_byte_data (client, ISL1208_REG_SR,
+ sr = i2c_smbus_write_byte_data(client, ISL1208_REG_SR,
sr | ISL1208_REG_SR_WRTC);
if (sr < 0) {
dev_err(&client->dev, "%s: writing SR failed\n", __func__);
@@ -369,7 +361,7 @@
}
/* clear WRTC again */
- sr = i2c_smbus_write_byte_data (client, ISL1208_REG_SR,
+ sr = i2c_smbus_write_byte_data(client, ISL1208_REG_SR,
sr & ~ISL1208_REG_SR_WRTC);
if (sr < 0) {
dev_err(&client->dev, "%s: writing SR failed\n", __func__);
@@ -380,70 +372,69 @@
}
-static int isl1208_rtc_set_time(struct device *dev, struct rtc_time *tm)
+static int
+isl1208_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
return isl1208_i2c_set_time(to_i2c_client(dev), tm);
}
-static int isl1208_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
+static int
+isl1208_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
{
return isl1208_i2c_read_alarm(to_i2c_client(dev), alarm);
}
static const struct rtc_class_ops isl1208_rtc_ops = {
- .proc = isl1208_rtc_proc,
- .read_time = isl1208_rtc_read_time,
- .set_time = isl1208_rtc_set_time,
- .read_alarm = isl1208_rtc_read_alarm,
- //.set_alarm = isl1208_rtc_set_alarm,
+ .proc = isl1208_rtc_proc,
+ .read_time = isl1208_rtc_read_time,
+ .set_time = isl1208_rtc_set_time,
+ .read_alarm = isl1208_rtc_read_alarm,
+ /*.set_alarm = isl1208_rtc_set_alarm, */
};
/* sysfs interface */
-static ssize_t isl1208_sysfs_show_atrim(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t
+isl1208_sysfs_show_atrim(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- int atr;
-
- atr = isl1208_i2c_get_atr(to_i2c_client(dev));
+ int atr = isl1208_i2c_get_atr(to_i2c_client(dev));
if (atr < 0)
return atr;
- return sprintf(buf, "%d.%.2d pF\n", atr>>2, (atr&0x3)*25);
+ return sprintf(buf, "%d.%.2d pF\n", atr >> 2, (atr & 0x3) * 25);
}
+
static DEVICE_ATTR(atrim, S_IRUGO, isl1208_sysfs_show_atrim, NULL);
-static ssize_t isl1208_sysfs_show_dtrim(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t
+isl1208_sysfs_show_dtrim(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- int dtr;
-
- dtr = isl1208_i2c_get_dtr(to_i2c_client(dev));
+ int dtr = isl1208_i2c_get_dtr(to_i2c_client(dev));
if (dtr < 0)
return dtr;
return sprintf(buf, "%d ppm\n", dtr);
}
+
static DEVICE_ATTR(dtrim, S_IRUGO, isl1208_sysfs_show_dtrim, NULL);
-static ssize_t isl1208_sysfs_show_usr(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t
+isl1208_sysfs_show_usr(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- int usr;
-
- usr = isl1208_i2c_get_usr(to_i2c_client(dev));
+ int usr = isl1208_i2c_get_usr(to_i2c_client(dev));
if (usr < 0)
return usr;
return sprintf(buf, "0x%.4x\n", usr);
}
-static ssize_t isl1208_sysfs_store_usr(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
+static ssize_t
+isl1208_sysfs_store_usr(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
int usr = -1;
@@ -460,124 +451,116 @@
return isl1208_i2c_set_usr(to_i2c_client(dev), usr) ? -EIO : count;
}
+
static DEVICE_ATTR(usr, S_IRUGO | S_IWUSR, isl1208_sysfs_show_usr,
isl1208_sysfs_store_usr);
static int
-isl1208_probe(struct i2c_adapter *adapter, int addr, int kind)
+isl1208_sysfs_register(struct device *dev)
{
- int rc = 0;
- struct i2c_client *new_client = NULL;
- struct rtc_device *rtc = NULL;
+ int err;
+
+ err = device_create_file(dev, &dev_attr_atrim);
+ if (err)
+ return err;
- if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
- rc = -ENODEV;
- goto failout;
+ err = device_create_file(dev, &dev_attr_dtrim);
+ if (err) {
+ device_remove_file(dev, &dev_attr_atrim);
+ return err;
}
- new_client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
- if (new_client == NULL) {
- rc = -ENOMEM;
- goto failout;
+ err = device_create_file(dev, &dev_attr_usr);
+ if (err) {
+ device_remove_file(dev, &dev_attr_atrim);
+ device_remove_file(dev, &dev_attr_dtrim);
}
- new_client->addr = addr;
- new_client->adapter = adapter;
- new_client->driver = &isl1208_driver;
- new_client->flags = 0;
- strcpy(new_client->name, DRV_NAME);
+ return 0;
+}
- if (kind < 0) {
- rc = isl1208_i2c_validate_client(new_client);
- if (rc < 0)
- goto failout;
- }
+static int
+isl1208_sysfs_unregister(struct device *dev)
+{
+ device_remove_file(dev, &dev_attr_atrim);
+ device_remove_file(dev, &dev_attr_atrim);
+ device_remove_file(dev, &dev_attr_usr);
+
+ return 0;
+}
+
+static int
+isl1208_probe(struct i2c_client *client)
+{
+ int rc = 0;
+ struct rtc_device *rtc;
- rc = i2c_attach_client(new_client);
- if (rc < 0)
- goto failout;
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+ return -ENODEV;
- dev_info(&new_client->dev,
+ if (isl1208_i2c_validate_client(client) < 0)
+ return -ENODEV;
+
+ dev_info(&client->dev,
"chip found, driver version " DRV_VERSION "\n");
rtc = rtc_device_register(isl1208_driver.driver.name,
- &new_client->dev,
- &isl1208_rtc_ops, THIS_MODULE);
-
- if (IS_ERR(rtc)) {
- rc = PTR_ERR(rtc);
- goto failout_detach;
- }
+ &client->dev, &isl1208_rtc_ops,
+ THIS_MODULE);
+ if (IS_ERR(rtc))
+ return PTR_ERR(rtc);
- i2c_set_clientdata(new_client, rtc);
+ i2c_set_clientdata(client, rtc);
- rc = isl1208_i2c_get_sr(new_client);
+ rc = isl1208_i2c_get_sr(client);
if (rc < 0) {
- dev_err(&new_client->dev, "reading status failed\n");
- goto failout_unregister;
+ dev_err(&client->dev, "reading status failed\n");
+ goto exit_unregister;
}
if (rc & ISL1208_REG_SR_RTCF)
- dev_warn(&new_client->dev, "rtc power failure detected, "
+ dev_warn(&client->dev, "rtc power failure detected, "
"please set clock.\n");
- rc = device_create_file(&new_client->dev, &dev_attr_atrim);
- if (rc < 0)
- goto failout_unregister;
- rc = device_create_file(&new_client->dev, &dev_attr_dtrim);
- if (rc < 0)
- goto failout_atrim;
- rc = device_create_file(&new_client->dev, &dev_attr_usr);
- if (rc < 0)
- goto failout_dtrim;
+ rc = isl1208_sysfs_register(&client->dev);
+ if (rc)
+ goto exit_unregister;
return 0;
- failout_dtrim:
- device_remove_file(&new_client->dev, &dev_attr_dtrim);
- failout_atrim:
- device_remove_file(&new_client->dev, &dev_attr_atrim);
- failout_unregister:
+ exit_unregister:
rtc_device_unregister(rtc);
- failout_detach:
- i2c_detach_client(new_client);
- failout:
- kfree(new_client);
- return rc;
-}
-static int
-isl1208_attach_adapter (struct i2c_adapter *adapter)
-{
- return i2c_probe(adapter, &addr_data, isl1208_probe);
+ return rc;
}
static int
-isl1208_detach_client(struct i2c_client *client)
+isl1208_remove(struct i2c_client *client)
{
- int rc;
- struct rtc_device *const rtc = i2c_get_clientdata(client);
-
- if (rtc)
- rtc_device_unregister(rtc); /* do we need to kfree? */
-
- rc = i2c_detach_client(client);
- if (rc)
- return rc;
+ struct rtc_device *rtc = i2c_get_clientdata(client);
- kfree(client);
+ isl1208_sysfs_unregister(&client->dev);
+ rtc_device_unregister(rtc);
return 0;
}
-/* module management */
+static struct i2c_driver isl1208_driver = {
+ .driver = {
+ .name = "rtc-isl1208",
+ },
+ .probe = isl1208_probe,
+ .remove = isl1208_remove,
+};
-static int __init isl1208_init(void)
+static int __init
+isl1208_init(void)
{
return i2c_add_driver(&isl1208_driver);
}
-static void __exit isl1208_exit(void)
+static void __exit
+isl1208_exit(void)
{
i2c_del_driver(&isl1208_driver);
}
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