path: root/packages/linux/linux-2.6.27/boc01/005-090112-isl12024.patch

Index: linux-2.6.27/drivers/i2c/chips/isl12024-eeprom.c
===================================================================
--- /dev/null
+++ linux-2.6.27/drivers/i2c/chips/isl12024-eeprom.c
@@ -0,0 +1,254 @@
+/*
+ * Intersil ISL12024 EEPROM class driver
+ *
+ *
+ * Copyright (C) 2007, CenoSYS (www.cenosys.com).
+ * Guillaume Ligneul
+ * Guillaume.ligneul@gmail.com
+ *
+ * Code is based on eeprom.c
+ *
+ * This software program is licensed subject to the GNU General Public License
+ * (GPL).Version 2,June 1991, available at http://www.fsf.org/copyleft/gpl.html
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+//#include <linux/slab.h>
+//#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/i2c/isl12024.h>
+
+/* Addresses to scan */
+static const unsigned short normal_i2c[] = { ISL12024_I2C_EEPROM_ADDR, I2C_CLIENT_END };
+
+/* Insmod parameters */
+I2C_CLIENT_INSMOD_1(eeprom);
+
+
+/* Size of EEPROM in bytes */
+#define EEPROM_SIZE		4096
+
+/* Each client has this additional data */
+struct eeprom_data {
+	struct i2c_client client;
+	struct mutex update_lock;
+};
+
+int
+isl12024_i2c_read(struct i2c_client *client, u8 reg, u8 buf[],
+		       unsigned len)
+{
+	int ret;
+	u8  dt_addr[2];
+
+	struct i2c_msg msgs[2] = {
+			{
+					.addr	= client->addr,
+					.flags	= 0,
+					.len	= 2,
+					.buf	= dt_addr,
+			},
+			{
+					.addr	= client->addr,
+					.flags	= I2C_M_RD,
+					.len	= len ,
+					.buf	= buf ,
+			},
+	};
+
+	dt_addr[0] = 0;
+	dt_addr[1] = reg;
+
+	ret = i2c_transfer(client->adapter, msgs, 2);
+	if ( ret < 0) {
+		dev_err(&client->dev, "read error\n");
+		return -EIO;
+	}
+	return ret;
+}
+
+
+int
+isl12024_i2c_write(struct i2c_client *client, u8 reg, u8 const buf[],
+		       unsigned len)
+{
+	int ret;
+	u8 i2c_buf[EEPROM_SIZE];
+
+	struct i2c_msg msgs[1] = {
+			{
+				.addr	= client->addr,
+				.flags	= 0,
+				.len	= len+2,
+				.buf	= i2c_buf,
+			 },
+		};
+
+	i2c_buf[0] = 0;
+	i2c_buf[1] = reg;
+
+
+	memcpy(&i2c_buf[2], &buf[0], len );
+
+
+	ret = i2c_transfer(client->adapter, msgs, 1);
+	printk(KERN_INFO "i2c_transfer %d\n",ret);
+	return ret;
+}
+static int eeprom_attach_adapter(struct i2c_adapter *adapter);
+static int eeprom_detect(struct i2c_adapter *adapter, int address, int kind);
+static int eeprom_detach_client(struct i2c_client *client);
+
+/* This is the driver that will be inserted */
+static struct i2c_driver eeprom_driver = {
+	.driver = {
+		.name	= "isl12024-eeprom",
+	},
+	.attach_adapter	= eeprom_attach_adapter,
+	.detach_client	= eeprom_detach_client,
+};
+
+static ssize_t eeprom_read(struct kobject *kobj, struct bin_attribute *bin_attr,
+			   char *buf, loff_t off, size_t count)
+{
+	struct i2c_client *client = to_i2c_client(container_of(kobj, struct device, kobj));
+	struct eeprom_data *data = i2c_get_clientdata(client);
+	int rc;
+
+	mutex_lock(&data->update_lock);
+
+	if (off >= EEPROM_SIZE)
+		return 0;
+
+	if (off + count > EEPROM_SIZE)
+		count = EEPROM_SIZE - off;
+
+	rc = isl12024_i2c_read(client,0,buf,EEPROM_SIZE);
+
+	if (rc < 0){
+		mutex_unlock(&data->update_lock);
+		return -EIO;
+	}
+
+	mutex_unlock(&data->update_lock);
+	return count;
+}
+
+static ssize_t eeprom_write(struct kobject *kobj, struct bin_attribute *attr,
+				   char *buf, loff_t off, size_t count)
+{
+	struct i2c_client *client = kobj_to_i2c_client(kobj);
+	struct eeprom_data *data = i2c_get_clientdata(client);
+
+	if (off >= 256)
+		return -ENOSPC;
+
+	if (off + count > 256)
+		count = 256 - off;
+
+	mutex_unlock(&data->update_lock);
+	if (isl12024_i2c_write(client, off, buf, count) < 0)
+	{
+		mutex_unlock(&data->update_lock);
+		return -EIO;
+	}
+
+	mutex_unlock(&data->update_lock);
+	return count;
+}
+
+static struct bin_attribute eeprom_attr = {
+	.attr = {
+		.name = "eeprom",
+		.mode = S_IRUGO,
+	},
+	.size = EEPROM_SIZE,
+	.read = eeprom_read,
+	.write= eeprom_write,
+};
+
+static int eeprom_attach_adapter(struct i2c_adapter *adapter)
+{
+	return i2c_probe(adapter, &addr_data, eeprom_detect);
+}
+
+/* This function is called by i2c_probe */
+static int eeprom_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+	struct i2c_client *new_client;
+	struct eeprom_data *data;
+	int err = 0;
+
+	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_BYTE_DATA
+					    | I2C_FUNC_SMBUS_BYTE))
+		goto exit;
+
+	if (!(data = kzalloc(sizeof(struct eeprom_data), GFP_KERNEL))) {
+		err = -ENOMEM;
+		goto exit;
+	}
+
+	new_client = &data->client;
+	i2c_set_clientdata(new_client, data);
+	new_client->addr = address;
+	new_client->adapter = adapter;
+	new_client->driver = &eeprom_driver;
+	new_client->flags = 0;
+
+	strlcpy(new_client->name, "isl12024-eeprom", I2C_NAME_SIZE);
+	mutex_init(&data->update_lock);
+
+	/* Tell the I2C layer a new client has arrived */
+	if ((err = i2c_attach_client(new_client)))
+		goto exit_kfree;
+
+	/* create the sysfs eeprom file */
+	err = sysfs_create_bin_file(&new_client->dev.kobj, &eeprom_attr);
+	if (err)
+		goto exit_detach;
+
+	return 0;
+
+exit_detach:
+	i2c_detach_client(new_client);
+exit_kfree:
+	kfree(data);
+exit:
+	return err;
+}
+
+static int eeprom_detach_client(struct i2c_client *client)
+{
+	int err;
+
+	sysfs_remove_bin_file(&client->dev.kobj, &eeprom_attr);
+
+	err = i2c_detach_client(client);
+	if (err)
+		return err;
+
+	kfree(i2c_get_clientdata(client));
+
+	return 0;
+}
+
+static int __init eeprom_init(void)
+{
+	return i2c_add_driver(&eeprom_driver);
+}
+
+static void __exit eeprom_exit(void)
+{
+	i2c_del_driver(&eeprom_driver);
+}
+
+
+MODULE_AUTHOR("Guillaume Ligneul <guillaume.ligneul@cenosys.com>");
+MODULE_DESCRIPTION("I2C Intersil12024 EEPROM driver");
+MODULE_LICENSE("GPL");
+
+module_init(eeprom_init);
+module_exit(eeprom_exit);
Index: linux-2.6.27/drivers/i2c/chips/Kconfig
===================================================================
--- linux-2.6.27.orig/drivers/i2c/chips/Kconfig
+++ linux-2.6.27/drivers/i2c/chips/Kconfig
@@ -40,6 +40,15 @@ config AT24
 	  This driver can also be built as a module.  If so, the module
 	  will be called at24.
 
+config ISL12024EEPROM
+	tristate "Intersil 12024 EEPROM"
+	depends on RTC_DRV_ISL12024
+	help
+	  If you say yes here you get support for Intersil12024 EEPROM.
+
+	  This driver can also be built as a module.  If so, the module
+	  will be called isl12024-eeprom.
+
 config SENSORS_EEPROM
 	tristate "EEPROM reader"
 	depends on EXPERIMENTAL
Index: linux-2.6.27/drivers/i2c/chips/Makefile
===================================================================
--- linux-2.6.27.orig/drivers/i2c/chips/Makefile
+++ linux-2.6.27/drivers/i2c/chips/Makefile
@@ -9,6 +9,8 @@
 # * I/O expander drivers go to drivers/gpio
 #
 
+
+obj-$(CONFIG_ISL12024EEPROM)		+= isl12024-eeprom.o
 obj-$(CONFIG_DS1682)		+= ds1682.o
 obj-$(CONFIG_AT24)		+= at24.o
 obj-$(CONFIG_SENSORS_EEPROM)	+= eeprom.o
Index: linux-2.6.27/drivers/rtc/Kconfig
===================================================================
--- linux-2.6.27.orig/drivers/rtc/Kconfig
+++ linux-2.6.27/drivers/rtc/Kconfig
@@ -124,6 +124,12 @@ comment "I2C RTC drivers"
 
 if I2C
 
+config RTC_DRV_ISL12024
+	tristate "Intersil 12024 RTC/ UniqueID"
+	help
+	  If you say yes ....
+	  This driver can also be built as a module.
+
 config RTC_DRV_DS1307
 	tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00"
 	help
Index: linux-2.6.27/drivers/rtc/Makefile
===================================================================
--- linux-2.6.27.orig/drivers/rtc/Makefile
+++ linux-2.6.27/drivers/rtc/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_RTC_DRV_DS1742)	+= rtc-ds17
 obj-$(CONFIG_RTC_DRV_EP93XX)	+= rtc-ep93xx.o
 obj-$(CONFIG_RTC_DRV_FM3130)	+= rtc-fm3130.o
 obj-$(CONFIG_RTC_DRV_ISL1208)	+= rtc-isl1208.o
+obj-$(CONFIG_RTC_DRV_ISL12024)	+= rtc-isl12024.o
 obj-$(CONFIG_RTC_DRV_M41T80)	+= rtc-m41t80.o
 obj-$(CONFIG_RTC_DRV_M41T94)	+= rtc-m41t94.o
 obj-$(CONFIG_RTC_DRV_M48T59)	+= rtc-m48t59.o
Index: linux-2.6.27/drivers/rtc/rtc-isl12024.c
===================================================================
--- /dev/null
+++ linux-2.6.27/drivers/rtc/rtc-isl12024.c
@@ -0,0 +1,516 @@
+/*
+ * Intersil ISL12024 class driver
+ *
+ *
+ * Copyright (C) 2007, CenoSYS (www.cenosys.com).
+ * Guillaume Ligneul
+ * Guillaume.ligneul@gmail.com
+ *
+ * This software program is licensed subject to the GNU General Public License
+ * (GPL).Version 2,June 1991, available at http://www.fsf.org/copyleft/gpl.html
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/bcd.h>
+#include <linux/rtc.h>
+#include <linux/proc_fs.h>
+#include <linux/i2c/isl12024.h>
+#include <linux/delay.h>
+
+
+#define DBG 1
+#undef DBG
+
+static u8 buf_id[ISL12024_RTC_SECTION_LEN] = { 0 ,};
+
+#define DRV_NAME "isl12024"
+#define DRV_VERSION "0.1"
+
+/* i2c configuration */
+
+static const unsigned short normal_i2c[] = {
+	ISL12024_I2C_ADDR >>1, I2C_CLIENT_END
+};
+I2C_CLIENT_INSMOD;
+
+/* Procfs management */
+static struct proc_dir_entry * root_proc = NULL;
+static struct proc_dir_entry * entry_proc = NULL;
+static int read_proc (char * page, char ** start, off_t off, int count, int * eof, void * data);
+
+static int isl12024_get_status(struct i2c_client *client, unsigned char *sr);
+static int isl12024_fix_osc(struct i2c_client *client);
+
+
+static int isl12024_attach_adapter(struct i2c_adapter *adapter);
+static int isl12024_detach_client(struct i2c_client *client);
+
+// To debug (may be add in includ/linux/i2c-id.h)
+#define I2C_DRIVERID_ISL12024   97
+
+static struct i2c_driver isl12024_driver = {
+	.driver		= {
+		.name	= DRV_NAME,
+	},
+	.id		= I2C_DRIVERID_ISL12024,
+	.attach_adapter = &isl12024_attach_adapter,
+	.detach_client	= &isl12024_detach_client,
+};
+
+int
+isl12024_i2c_read_regs(struct i2c_client *client, u8 reg, u8 buf[],
+		       unsigned len)
+{
+	int ret;
+	u8  dt_addr[2];
+
+	struct i2c_msg msgs[2] = {
+			{
+					.addr	= client->addr,
+					.flags	= 0,
+					.len	= 2,
+					.buf	= dt_addr,
+			},
+			{
+					.addr	= client->addr,
+					.flags	= I2C_M_RD,
+					.len	= len ,
+					.buf	= buf ,
+			},
+	};
+
+	dt_addr[0] = 0;
+	dt_addr[1] = reg;
+
+	ret = i2c_transfer(client->adapter, msgs, 2);
+	if ( ret < 0) {
+		dev_err(&client->dev, "read error\n");
+		return -EIO;
+	}
+	return ret;
+}
+
+EXPORT_SYMBOL(isl12024_i2c_read_regs);
+
+
+int
+isl12024_i2c_set_regs(struct i2c_client *client, u8 reg, u8 const buf[],
+		       unsigned len)
+{
+	int ret;
+	u8 i2c_buf[10];
+
+	struct i2c_msg msgs[1] = {
+			{
+				.addr	= client->addr,
+				.flags	= 0,
+				.len	= len+2,
+				.buf	= i2c_buf,
+			 },
+		};
+
+	i2c_buf[0] = 0;
+	i2c_buf[1] = reg;
+
+
+	memcpy(&i2c_buf[2], &buf[0], len );
+
+
+	ret = i2c_transfer(client->adapter, msgs, 1);
+	printk(KERN_INFO "i2c_transfer %d\n",ret);
+	return ret;
+}
+
+EXPORT_SYMBOL(isl12024_i2c_set_regs);
+
+static int isl12024_i2c_validate_client(struct i2c_client *client)
+{
+	u8 regs[ISL12024_RTC_SECTION_LEN] = { 0, };
+	u8 zero_mask[ISL12024_RTC_SECTION_LEN] = {
+		0x80, 0x80, 0x40, 0xc0, 0xe0, 0x00, 0xf8, 0xc6
+	};
+
+	int i;
+	int ret;
+
+	ret = isl12024_i2c_read_regs(client, ISL12024_REG_SC, regs, ISL12024_RTC_SECTION_LEN);
+
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; i < ISL12024_RTC_SECTION_LEN; ++i) {
+		if (regs[i] & zero_mask[i]) /* check if bits are cleared */
+			return -ENODEV;
+
+	}
+
+	return 0;
+}
+
+static int isl12024_read_time(struct i2c_client *client,
+				 struct rtc_time *tm)
+{
+	unsigned char sr;
+	int err;
+	u8 regs[ISL12024_RTC_SECTION_LEN] = { 0, };
+
+	printk(KERN_INFO "%s\n ",__FUNCTION__ );
+
+
+	if (isl12024_get_status(client, &sr) < 0) {
+		dev_err(&client->dev, "%s: reading SR failed\n", __func__);
+		return -EIO;
+	}
+
+	err = isl12024_i2c_read_regs(client, ISL12024_REG_SC, regs, ISL12024_RTC_SECTION_LEN);
+
+#ifdef DBG
+	int i;
+	for(i=0; i<ISL12024_RTC_SECTION_LEN; i++)
+		printk(KERN_INFO "0x%2X\n", regs[i]);
+#endif
+
+	if (err < 0) {
+		dev_err(&client->dev, "%s: reading RTC section failed\n",
+				__func__);
+		return sr;
+	}
+
+	tm->tm_sec = BCD2BIN(regs[0]);
+	tm->tm_min = BCD2BIN(regs[1]);
+
+	{ /* HR field has a more complex interpretation */
+		const u8 _hr = regs[2];
+		if (_hr & ISL12024_REG_HR_MIL) /* 24h format */
+			tm->tm_hour = BCD2BIN(_hr & 0x3f);
+		else { // 12h format
+			tm->tm_hour = BCD2BIN(_hr & 0x1f);
+			if (_hr & ISL12024_REG_HR_PM) /* PM flag set */
+				tm->tm_hour += 12;
+		}
+	}
+
+	tm->tm_mday = BCD2BIN(regs[3]);
+	tm->tm_mon  = BCD2BIN(regs[4]);
+	tm->tm_year = BCD2BIN(regs[5]) + 100;
+	tm->tm_wday = BCD2BIN(regs[6]);
+
+	return rtc_valid_tm(tm);
+}
+
+static int isl12024_get_status(struct i2c_client *client, unsigned char *sr)
+{
+	static unsigned char sr_addr[2] = { 0, ISL12024_REG_SR };
+
+	struct i2c_msg msgs[] = {
+		{ client->addr, 0, 2, sr_addr },	/* setup read ptr */
+		{ client->addr, I2C_M_RD, 1, sr },	/* read status */
+	};
+
+	/* read status register */
+	if (i2c_transfer(client->adapter, &msgs[0], 2) != 2) {
+		dev_err(&client->dev, "%s: read error\n", __func__);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int isl12024_set_datetime(struct i2c_client *client, struct rtc_time *tm,
+			int datetoo, u8 reg_base, unsigned char alm_enable)
+{
+	int i, xfer, nbytes;
+	unsigned char buf[8];
+	unsigned char rdata[10] = { 0, reg_base };
+
+	static const unsigned char wel[3] = { 0, ISL12024_REG_SR,
+						ISL12024_SR_WEL };
+
+	static const unsigned char rwel[3] = { 0, ISL12024_REG_SR,
+						ISL12024_SR_WEL | ISL12024_SR_RWEL };
+
+	static const unsigned char diswe[3] = { 0, ISL12024_REG_SR, 0 };
+
+	dev_dbg(&client->dev,
+		"%s: secs=%d, mins=%d, hours=%d\n",
+		__func__,
+		tm->tm_sec, tm->tm_min, tm->tm_hour);
+
+	buf[CCR_SEC] = BIN2BCD(tm->tm_sec);
+	buf[CCR_MIN] = BIN2BCD(tm->tm_min);
+
+	/* set hour and 24hr bit */
+	buf[CCR_HOUR] = BIN2BCD(tm->tm_hour) | ISL12024_HR_MIL;
+
+	/* should we also set the date? */
+	if (datetoo) {
+		dev_dbg(&client->dev,
+			"%s: mday=%d, mon=%d, year=%d, wday=%d\n",
+			__func__,
+			tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
+
+		buf[CCR_MDAY] = BIN2BCD(tm->tm_mday);
+
+		/* month, 1 - 12 */
+		buf[CCR_MONTH] = BIN2BCD(tm->tm_mon);
+
+		/* year, since the rtc epoch*/
+		buf[CCR_YEAR] = BIN2BCD(tm->tm_year % 100);
+		buf[CCR_WDAY] = tm->tm_wday & 0x07;
+		buf[CCR_Y2K] = BIN2BCD(tm->tm_year / 100);
+	}
+
+	/* If writing alarm registers, set compare bits on registers 0-4 */
+	if (reg_base < ISL12024_CCR_BASE)
+		for (i = 0; i <= 4; i++)
+			buf[i] |= 0x80;
+
+	/* this sequence is required to unlock the chip */
+	if ((xfer = i2c_master_send(client, wel, 3)) != 3) {
+		dev_err(&client->dev, "%s: wel - %d\n", __func__, xfer);
+		return -EIO;
+	}
+
+	if ((xfer = i2c_master_send(client, rwel, 3)) != 3) {
+		dev_err(&client->dev, "%s: rwel - %d\n", __func__, xfer);
+		return -EIO;
+	}
+
+
+	/* write register's data */
+	if (datetoo)
+		nbytes = 8;
+	else
+		nbytes = 3;
+	for (i = 0; i < nbytes; i++)
+		rdata[2+i] = buf[i];
+
+	xfer = i2c_master_send(client, rdata, nbytes+2);
+	if (xfer != nbytes+2) {
+		dev_err(&client->dev,
+			"%s: result=%d addr=%02x, data=%02x\n",
+			__func__,
+			 xfer, rdata[1], rdata[2]);
+		return -EIO;
+	}
+
+	/* If we wrote to the nonvolatile region, wait 10msec for write cycle*/
+	if (reg_base < ISL12024_CCR_BASE) {
+		unsigned char al0e[3] = { 0, ISL12024_REG_INT, 0 };
+
+		msleep(10);
+
+		/* ...and set or clear the AL0E bit in the INT register */
+
+		/* Need to set RWEL again as the write has cleared it */
+		xfer = i2c_master_send(client, rwel, 3);
+		if (xfer != 3) {
+			dev_err(&client->dev,
+				"%s: aloe rwel - %d\n",
+				__func__,
+				xfer);
+			return -EIO;
+		}
+
+		if (alm_enable)
+			al0e[2] = ISL12024_INT_AL0E;
+
+		xfer = i2c_master_send(client, al0e, 3);
+		if (xfer != 3) {
+			dev_err(&client->dev,
+				"%s: al0e - %d\n",
+				__func__,
+				xfer);
+			return -EIO;
+		}
+
+		/* and wait 10msec again for this write to complete */
+		msleep(10);
+	}
+
+	/* disable further writes */
+	if ((xfer = i2c_master_send(client, diswe, 3)) != 3) {
+		dev_err(&client->dev, "%s: diswe - %d\n", __func__, xfer);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int isl12024_fix_osc(struct i2c_client *client)
+{
+	int err;
+	struct rtc_time tm;
+
+	tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
+
+	err = isl12024_set_datetime(client, &tm, 0, ISL12024_CCR_BASE, 0);
+	if (err < 0)
+		printk(KERN_INFO "unable to restart the oscillator\n");
+
+	return err;
+}
+
+static int isl12024_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+	return isl12024_read_time(to_i2c_client(dev), tm);
+
+}
+
+static int isl12024_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+	return isl12024_set_datetime(to_i2c_client(dev),
+			tm, 1, ISL12024_CCR_BASE, 0);
+}
+
+static int
+isl12024_rtc_proc(struct device *dev, struct seq_file *seq)
+{
+
+	/* Nothing to do */
+
+	return 0;
+}
+
+static const struct rtc_class_ops isl12024_rtc_ops = {
+	.proc		= isl12024_rtc_proc,
+	.read_time	= isl12024_rtc_read_time,
+	.set_time	= isl12024_rtc_set_time,
+};
+
+static int read_proc (char * page, char ** start, off_t off, int count, int * eof, void * data)
+{
+	int i=0;
+
+		printk("id: 0x");
+			for(i=0;i<ISL12024_RTC_SECTION_LEN;i++)
+				printk("%02X",buf_id[i]);
+			printk("\n");
+	return 0;
+}
+
+static int
+isl12024_probe(struct i2c_adapter *adapter, int addr, int kind)
+{
+
+	int rc = 0;
+	int err = 0;
+	unsigned char sr;
+	struct i2c_client *new_client = NULL;
+	struct rtc_device *rtc = NULL;
+
+	if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
+		rc = -ENODEV;
+		goto failout;
+	}
+
+	new_client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
+	if (new_client == NULL) {
+		rc = -ENOMEM;
+		goto failout;
+	}
+
+	new_client->addr = addr;
+	new_client->adapter = adapter;
+	new_client->driver = &isl12024_driver;
+	new_client->flags = 0;
+	strcpy(new_client->name, DRV_NAME);
+
+	if (kind < 0) {
+		rc = isl12024_i2c_validate_client(new_client);
+		if (rc < 0)
+			goto failout;
+	}
+
+	rc = i2c_attach_client(new_client);
+	if (rc < 0)
+		goto failout;
+
+	rtc = rtc_device_register(isl12024_driver.driver.name,
+				  &new_client->dev,
+				  &isl12024_rtc_ops, THIS_MODULE);
+
+	if (IS_ERR(rtc)) {
+		printk("Error during rtc registration\n");
+		rc = PTR_ERR(rtc);
+		goto failout;
+	}
+
+	i2c_set_clientdata(new_client, rtc);
+
+	/* Check for power failures and eventualy enable the osc */
+		if ((err = isl12024_get_status(new_client, &sr)) == 0) {
+			if (sr & ISL12024_SR_RTCF) {
+				printk(KERN_INFO "power failure detected, "
+					"please set the clock\n");
+				udelay(50);
+				isl12024_fix_osc(new_client);
+			}
+		}
+		else
+			printk(KERN_INFO "couldn't read status\n");
+
+	root_proc = proc_mkdir( "isl12024", 0 );
+	entry_proc = create_proc_entry("id",  S_IFREG | S_IRUGO | S_IWUSR, root_proc);
+
+	if (entry_proc == NULL)
+			return -1;
+
+	entry_proc->owner = THIS_MODULE;
+	entry_proc->read_proc = read_proc;
+
+	/* read unique id from eeprom */
+	isl12024_i2c_read_regs(new_client, ISL12024_REG_ID, buf_id, sizeof(buf_id));
+
+
+	return 0;
+
+ failout:
+	kfree(new_client);
+	return rc;
+}
+
+static int
+isl12024_attach_adapter (struct i2c_adapter *adapter)
+{
+	return i2c_probe(adapter, &addr_data, isl12024_probe);
+}
+
+static int
+isl12024_detach_client(struct i2c_client *client)
+{
+	int rc;
+	struct rtc_device *const rtc = i2c_get_clientdata(client);
+
+	if (rtc)
+		rtc_device_unregister(rtc);
+
+	rc = i2c_detach_client(client);
+	if (rc)
+		return rc;
+
+	kfree(client);
+
+	return 0;
+}
+
+/* module init/exit */
+
+static int __init isl12024_init(void)
+{
+	return i2c_add_driver(&isl12024_driver);
+}
+
+static void __exit isl12024_exit(void)
+{
+	i2c_del_driver(&isl12024_driver);
+}
+
+MODULE_AUTHOR("Guillaume Ligneul <guillaume.ligneul@cenosys.com>");
+MODULE_DESCRIPTION("Intersil ISL12024 driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+
+module_init(isl12024_init);
+module_exit(isl12024_exit);
Index: linux-2.6.27/include/linux/i2c/isl12024.h
===================================================================
--- /dev/null
+++ linux-2.6.27/include/linux/i2c/isl12024.h
@@ -0,0 +1,103 @@
+/*
+ * Intersil ISL12024 chip registers definitions
+ *
+ *
+ * Copyright (C) 2008, CenoSYS (www.cenosys.com).
+ * Guillaume Ligneul
+ * Guillaume.ligneul@gmail.com
+ *
+ * This software program is licensed subject to the GNU General Public License
+ * (GPL).Version 2,June 1991, available at http://www.fsf.org/copyleft/gpl.html
+ */
+
+#ifndef ISL12024_H_
+#define ISL12024_H_
+
+#define ISL12024_REG_SR		0x3F	/* status register */
+#define ISL12024_REG_Y2K		0x37
+#define ISL12024_REG_DW		0x36
+#define ISL12024_REG_YR		0x35
+#define ISL12024_REG_MO		0x34
+#define ISL12024_REG_DT		0x33
+#define ISL12024_REG_HR		0x32
+#define ISL12024_REG_MN		0x31
+#define ISL12024_REG_SC		0x30
+#define ISL12024_REG_DTR		0x13
+#define ISL12024_REG_ATR		0x12
+#define ISL12024_REG_INT		0x11
+#define ISL12024_REG_0		0x10
+#define ISL12024_REG_Y2K1		0x0F
+#define ISL12024_REG_DWA1		0x0E
+#define ISL12024_REG_YRA1		0x0D
+#define ISL12024_REG_MOA1		0x0C
+#define ISL12024_REG_DTA1		0x0B
+#define ISL12024_REG_HRA1		0x0A
+#define ISL12024_REG_MNA1		0x09
+#define ISL12024_REG_SCA1		0x08
+#define ISL12024_REG_Y2K0		0x07
+#define ISL12024_REG_DWA0		0x06
+#define ISL12024_REG_YRA0		0x05
+#define ISL12024_REG_MOA0		0x04
+#define ISL12024_REG_DTA0		0x03
+#define ISL12024_REG_HRA0		0x02
+#define ISL12024_REG_MNA0		0x01
+#define ISL12024_REG_SCA0		0x00
+
+#define ISL12024_CCR_BASE		0x30	/* Base address of CCR */
+#define ISL12024_ALM0_BASE		0x00	/* Base address of ALARM0 */
+
+#define ISL12024_SR_RTCF		0x01	/* Clock failure */
+#define ISL12024_SR_WEL		0x02	/* Write Enable Latch */
+#define ISL12024_SR_RWEL		0x04	/* Register Write Enable */
+#define ISL12024_SR_AL0		0x20	/* Alarm 0 match */
+
+#define ISL12024_DTR_DTR0		0x01
+#define ISL12024_DTR_DTR1		0x02
+#define ISL12024_DTR_DTR2		0x04
+
+#define ISL12024_HR_MIL		0x80	/* Set in ccr.hour for 24 hr mode */
+
+#define ISL12024_INT_AL0E		0x20	/* Alarm 0 enable */
+/* I2C ADDRESS */
+#define ISL12024_I2C_ADDR 0xDE
+#define ISL12024_I2C_EEPROM_ADDR 0x57
+/* device id section */
+#define ISL12024_REG_ID 0x20
+/* Register map */
+/* rtc section */
+//#define ISL12024_REG_MSB 0x00
+//#define ISL12024_REG_SC  0x30 /* Seconds */
+//#define ISL12024_REG_MN  0x31 /* Minutes */
+//#define ISL12024_REG_HR  0x32 /* Hours */
+#define ISL12024_REG_HR_MIL     (1<<7) /* 24h/12h mode */
+#define ISL12024_REG_HR_PM      (1<<5) /* PM/AM bit in 12h mode */
+//#define ISL12024_REG_DT  0x33  /* Date */
+//#define ISL12024_REG_MO  0x34  /* Month */
+//#define ISL12024_REG_YR  0x35  /* Year */
+//#define ISL12024_REG_DW  0x36
+//#define ISL12024_REG_Y2K 0x37
+#define ISL12024_RTC_SECTION_LEN 8
+
+
+
+/* control/status section */
+//#define ISL12024_REG_SR  0x3F
+//#define ISL12024_REG_SR_BAT    (1<<7) /* battery */
+//#define ISL12024_REG_SR_AL1    (1<<6) /* alarm 0 */
+//#define ISL12024_REG_SR_AL0    (1<<5) /* alarm 1 */
+//#define ISL12024_REG_SR_OSCF   (1<<4) /* oscillator fail */
+//#define ISL12024_REG_SR_RWEL   (1<<2) /* register write enable latch */
+//#define ISL12024_REG_SR_WEL    (1<<1) /* write enable latch */
+//#define ISL12024_REG_SR_RTCF    (1<<0) /* rtc fail */
+//#define ISL12024_REG_INT 0x11
+
+#define CCR_SEC			0
+#define CCR_MIN			1
+#define CCR_HOUR		2
+#define CCR_MDAY		3
+#define CCR_MONTH		4
+#define CCR_YEAR		5
+#define CCR_WDAY		6
+#define CCR_Y2K			7
+
+#endif /*ISL12024_H_*/