nas100d-kernel: i2c version 0.0.4 plus pcf8563 driver

1 files changed, 610 insertions, 46 deletions

diff --git a/packages/linux/nas100d-kernel/2.6.14/60-nas100d-i2c.patch b/packages/linux/nas100d-kernel/2.6.14/60-nas100d-i2c.patch
index b4c5e3c63b..69d0c47282 100644
--- a/packages/linux/nas100d-kernel/2.6.14/60-nas100d-i2c.patch
+++ b/packages/linux/nas100d-kernel/2.6.14/60-nas100d-i2c.patch
@@ -1,9 +1,12 @@
- drivers/i2c/algos/i2c-algo-bit.c |    9 +++++++--
- drivers/i2c/busses/i2c-ixp4xx.c  |    9 ++++++---
- 2 files changed, 13 insertions(+), 5 deletions(-)
+ drivers/i2c/busses/i2c-ixp4xx.c |    9 
+ drivers/i2c/chips/Kconfig       |    9 
+ drivers/i2c/chips/Makefile      |    1 
+ drivers/i2c/chips/pcf8563.c     |  547 ++++++++++++++++++++++++++++++++++++++++
+ include/linux/pcf8563.h         |   24 +
+ 5 files changed, 587 insertions(+), 3 deletions(-)
 
 --- linux-nas100d.orig/drivers/i2c/busses/i2c-ixp4xx.c	2005-11-11 22:22:43.000000000 +0100
-+++ linux-nas100d/drivers/i2c/busses/i2c-ixp4xx.c	2005-11-15 11:51:51.000000000 +0100
++++ linux-nas100d/drivers/i2c/busses/i2c-ixp4xx.c	2005-11-15 22:06:23.000000000 +0100
 @@ -65,7 +65,6 @@ static int ixp4xx_bit_getscl(void *data)
  
  	gpio_line_config(ixp4xx_scl_pin(data), IXP4XX_GPIO_IN );
@@ -26,8 +29,8 @@
  	drv_data->algo_data.timeout = 100;
 -
 +#ifdef CONFIG_MACH_NAS100D
-+	drv_data->algo_data.udelay = 200;
-+	drv_data->algo_data.mdelay = 200;
++	drv_data->algo_data.udelay = 100;
++	drv_data->algo_data.mdelay = 100;
 +#endif
  	drv_data->adapter.id = I2C_HW_B_IXP4XX;
  	drv_data->adapter.algo_data = &drv_data->algo_data;
@@ -36,50 +39,611 @@
  		return err;
  	}
  
-+	printk(KERN_INFO "i2c: ixp4xx 0.0.3\n");
++	printk(KERN_INFO "i2c: ixp4xx 0.0.4\n");
 +
  	dev_set_drvdata(&plat_dev->dev, drv_data);
  
  	return 0;
---- linux-nas100d.orig/drivers/i2c/algos/i2c-algo-bit.c	2005-11-15 11:01:31.000000000 +0100
-+++ linux-nas100d/drivers/i2c/algos/i2c-algo-bit.c	2005-11-15 11:47:33.000000000 +0100
-@@ -44,8 +44,8 @@
- 
- /* module parameters:
-  */
--static int i2c_debug;
--static int bit_test;	/* see if the line-setting functions work	*/
-+static int i2c_debug=2;
-+static int bit_test=1;	/* see if the line-setting functions work	*/
- 
- /* --- setting states on the bus with the right timing: ---------------	*/
- 
-@@ -203,6 +203,7 @@ static int i2c_inb(struct i2c_adapter *i
- 			return -ETIMEDOUT;
- 		};
- 		indata *= 2;
-+		udelay(adap->udelay);
- 		if ( getsda(adap) ) 
- 			indata |= 0x01;
- 		scllo(adap);
-@@ -544,6 +545,8 @@ int i2c_bit_add_bus(struct i2c_adapter *
- 	adap->timeout = 100;	/* default values, should	*/
- 	adap->retries = 3;	/* be replaced by defines	*/
- 
-+	printk(KERN_INFO "i2c: algo-bit 0.0.3\n");
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ linux-nas100d/drivers/i2c/chips/pcf8563.c	2005-11-16 01:18:21.000000000 +0100
+@@ -0,0 +1,547 @@
++/*
++ *  pcf8563.c - An i2c driver for the Philips PCF8563 RTC
++ *  Copyright 2005 Alessandro Zummo
++ *
++ *  please send all reports to:
++ *      a dot zummo at towertech dot it
++ *
++ *  based on the other drivers in this same directory.
++ *
++ *  http://www.semiconductors.philips.com/acrobat/datasheets/PCF8563-04.pdf
++ *
++ *  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.
++ */
++
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/slab.h>
++#include <linux/i2c.h>
++#include <linux/string.h>
++#include <linux/bcd.h>
++#include <linux/rtc.h>
++#include <linux/list.h>
++
++#include <linux/pcf8563.h>
++
++#define DRV_VERSION "0.2"
++
++/* Addresses to scan */
++static unsigned short normal_i2c[] = { 0x51, I2C_CLIENT_END };
++
++/* Module parameters */
++I2C_CLIENT_INSMOD;
++I2C_CLIENT_MODULE_PARM(hctosys,
++	"Set the system time from the hardware clock upon initialization");
++
++#define PCF8563_REG_ST1		0x00 /* status */
++#define PCF8563_REG_ST2		0x01
++
++#define PCF8563_REG_SC		0x02 /* datetime */
++#define PCF8563_REG_MN		0x03
++#define PCF8563_REG_HR		0x04
++#define PCF8563_REG_DM		0x05
++#define PCF8563_REG_DW		0x06
++#define PCF8563_REG_MO		0x07
++#define PCF8563_REG_YR		0x08
++
++#define PCF8563_REG_AMN		0x09 /* alarm */
++#define PCF8563_REG_AHR		0x0A
++#define PCF8563_REG_ADM		0x0B
++#define PCF8563_REG_ADW		0x0C
++
++#define PCF8563_REG_CLKO	0x0D /* clock out */
++#define PCF8563_REG_TMRC	0x0E /* timer control */
++#define PCF8563_REG_TMR		0x0F /* timer */
++
++#define PCF8563_SC_LV		0x80 /* low voltage */
++
++/* Prototypes */
++static int pcf8563_attach(struct i2c_adapter *adapter);
++static int pcf8563_detach(struct i2c_client *client);
++static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind);
++static int pcf8563_command(struct i2c_client *client, unsigned int cmd,
++	void *arg);
++
++static struct i2c_driver pcf8563_driver = {
++	.owner		= THIS_MODULE,
++	.name		= "pcf8563",
++	.flags		= I2C_DF_NOTIFY,
++	.attach_adapter = &pcf8563_attach,
++	.detach_client	= &pcf8563_detach,
++};
++
++struct pcf8563_data {
++	struct i2c_client client;
++	struct list_head list;
++};
++
++static const unsigned char days_in_mo[] =
++	{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
++
++static LIST_HEAD(pcf8563_clients);
++
++/* Workaround until the I2C subsytem will allow to send
++ * commands to a specific client. This function will send the command
++ * to the first client.
++ */
++int pcf8563_do_command(unsigned int cmd, void *arg)
++{
++	struct list_head *walk;
++	struct list_head *tmp;
++	struct pcf8563_data *data;
++
++	list_for_each_safe(walk, tmp, &pcf8563_clients) {
++		data = list_entry(walk, struct pcf8563_data, list);
++		return pcf8563_command(&data->client, cmd, arg);
++	}
++
++	return -ENODEV;
++}
++
++#define is_leap(year) \
++	((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
++
++/* make sure the rtc_time values are in bounds */
++
++static int pcf8563_validate_tm(struct rtc_time *tm)
++{
++	int year = tm->tm_year + 1900;
++
++	if ((tm->tm_year < 70) || (tm->tm_year > 255))
++		return -EINVAL;
++
++	if ((tm->tm_mon > 11) || (tm->tm_mday == 0))
++		return -EINVAL;
++
++	if (tm->tm_mday > days_in_mo[tm->tm_mon]
++		+ ((tm->tm_mon == 1) && is_leap(year)))
++		return -EINVAL;
++
++	if ((tm->tm_hour >= 24) || (tm->tm_min >= 60) || (tm->tm_sec >= 60))
++		return -EINVAL;
++
++	return 0;
++}
 +
- 	i2c_add_adapter(adap);
- 	return 0;
- }
-@@ -561,9 +564,11 @@ MODULE_AUTHOR("Simon G. Vogl <simon@tk.u
- MODULE_DESCRIPTION("I2C-Bus bit-banging algorithm");
- MODULE_LICENSE("GPL");
- 
 +/*
- module_param(bit_test, bool, 0);
- module_param(i2c_debug, int, S_IRUGO | S_IWUSR);
- 
- MODULE_PARM_DESC(bit_test, "Test the lines of the bus to see if it is stuck");
- MODULE_PARM_DESC(i2c_debug,
- 		 "debug level - 0 off; 1 normal; 2,3 more verbose; 9 bit-protocol");
++ * In the routines that deal directly with the pcf8563 hardware, we use
++ * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
++ */
++static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm)
++{
++	unsigned char buf[13];
++	unsigned char addr = PCF8563_REG_ST1;
++
++	struct i2c_msg msgs[] = {
++		{ client->addr, 0, 1, &addr },	/* setup read ptr */
++		{ client->addr, I2C_M_RD, 13, buf },	/* read status + date */
++	};
++
++	/* read registers */
++	if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
++		dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
++		return -EIO;
++	}
++
++        if (buf[PCF8563_REG_SC] & PCF8563_SC_LV)
++                dev_info(&client->dev,
++			"low voltage detected, date/time is not reliable.\n");
++
++	dev_dbg(&client->dev,
++		"%s: raw read data - st1=%02x, st2=%02x, sec=%02x, min=%02x, hr=%02x, "
++		"mday=%02x, wday=%02x, mon=%02x, year=%02x\n",
++		__FUNCTION__,
++		buf[0], buf[1], buf[2], buf[3],
++		buf[4], buf[5], buf[6], buf[7],
++		buf[8]);
++
++
++	tm->tm_sec = BCD2BIN(buf[PCF8563_REG_SC] & 0x7F);
++	tm->tm_min = BCD2BIN(buf[PCF8563_REG_MN] & 0x7F);
++	tm->tm_hour = BCD2BIN(buf[PCF8563_REG_HR] & 0x3F); /* rtc hr 0-23 */
++	tm->tm_mday = BCD2BIN(buf[PCF8563_REG_DM] & 0x3F);
++	tm->tm_wday = buf[PCF8563_REG_DW] & 0x07;
++	tm->tm_mon = BCD2BIN(buf[PCF8563_REG_MN] & 0x1F) - 1; /* rtc mn 1-12 */
++	tm->tm_year = BCD2BIN(buf[PCF8563_REG_YR])
++		+ (buf[PCF8563_REG_MN] & 0x80 ? 100 : 0);
++
++	dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
++		"mday=%d, mon=%d, year=%d, wday=%d\n",
++		__FUNCTION__,
++		tm->tm_sec, tm->tm_min, tm->tm_hour,
++		tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
++
++	if (!pcf8563_validate_tm(tm)) {
++		dev_err(&client->dev, "retrieved date/time is not valid.\n");
++		return -EINVAL;
++	}
++
++	return 0;
++}
++
++#if 0
++static int pcf8563_set_datetime(struct i2c_client *client, struct rtc_time *tm,
++				int datetoo, u8 reg_base)
++{
++	int i, err, xfer;
++
++	unsigned char buf[8];
++
++	static const unsigned char wel[3] = { 0, PCF8563_REG_SR,
++						PCF8563_SR_WEL };
++
++	static const unsigned char rwel[3] = { 0, PCF8563_REG_SR,
++						PCF8563_SR_WEL | PCF8563_SR_RWEL };
++
++	static const unsigned char diswe[3] = { 0, PCF8563_REG_SR, 0 };
++
++	struct pcf8563_data *data = i2c_get_clientdata(client);
++
++	/* check if all values in the tm struct are correct */
++	if ((err = pcf8563_validate_tm(tm)) < 0)
++		return err;
++
++	dev_dbg(&client->dev, "%s: secs=%d, mins=%d, hours=%d, "
++		"mday=%d, mon=%d, year=%d, wday=%d\n",
++		__FUNCTION__,
++		tm->tm_sec, tm->tm_min, tm->tm_hour,
++		tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
++
++	buf[PCF8563_REG_SEC] = BIN2BCD(tm->tm_sec);
++	buf[PCF8563_REG_MIN] = BIN2BCD(tm->tm_min);
++
++	/* set hour and 24hr bit */
++	buf[PCF8563_REG_HOUR] = BIN2BCD(tm->tm_hour) | PCF8563_HR_MIL;
++
++	/* should we also set the date? */
++	if (datetoo) {
++		buf[PCF8563_REG_MDAY] = BIN2BCD(tm->tm_mday);
++
++		/* month, 0 - 11 */
++		buf[PCF8563_REG_MONTH] = BIN2BCD(tm->tm_mon);
++
++		/* year, since 1900 */
++		buf[PCF8563_REG_YEAR] = BIN2BCD(tm->tm_year + 1900 - data->epoch);
++		buf[PCF8563_REG_WDAY] = tm->tm_wday & 0x07;
++		buf[PCF8563_REG_Y2K] = BIN2BCD(data->epoch / 100);
++	}
++
++	/* this sequence is required to unlock the chip */
++	xfer = i2c_master_send(client, wel, 3);
++	if (xfer != 3) {
++		dev_err(&client->dev, "%s: wel - %d\n", __FUNCTION__, xfer);
++		return -EIO;
++	}
++
++	xfer = i2c_master_send(client, rwel, 3);
++	if (xfer != 3) {
++		dev_err(&client->dev, "%s: rwel - %d\n", __FUNCTION__, xfer);
++		return -EIO;
++	}
++
++	/* write register's data */
++	for (i = 0; i < (datetoo ? 8 : 3); i++) {
++		unsigned char rdata[3] = { 0, reg_base + i, buf[i] };
++
++		xfer = i2c_master_send(client, rdata, 3);
++		if (xfer != 3) {
++			dev_err(&client->dev,
++				"%s: xfer=%d addr=%02x, data=%02x\n",
++				__FUNCTION__,
++				 xfer, rdata[1], rdata[2]);
++			return -EIO;
++		}
++	};
++
++	/* disable further writes */
++	xfer = i2c_master_send(client, diswe, 3);
++	if (xfer != 3) {
++		dev_err(&client->dev, "%s: diswe - %d\n", __FUNCTION__, xfer);
++		return -EIO;
++	}
++
++	return 0;
++}
++#endif
++
++static int pcf8563_hctosys(struct i2c_client *client)
++{
++	int err;
++
++	struct rtc_time tm;
++	struct timespec tv;
++
++	err = pcf8563_command(client, PCF8563_CMD_GETDATETIME, &tm);
++
++	if (err) {
++		dev_err(&client->dev,
++			"Unable to set the system clock\n");
++		return err;
++	}
++
++	/* IMPORTANT: the RTC only stores whole seconds. It is arbitrary
++	 * whether it stores the most close value or the value with partial
++	 * seconds truncated. However, it is important that we use it to store
++	 * the truncated value. This is because otherwise it is necessary,
++	 * in an rtc sync function, to read both xtime.tv_sec and
++	 * xtime.tv_nsec. On some processors (i.e. ARM), an atomic read
++	 * of >32bits is not possible. So storing the most close value would
++	 * slow down the sync API. So here we have the truncated value and
++	 * the best guess is to add 0.5s.
++	 */
++
++	tv.tv_nsec = NSEC_PER_SEC >> 1;
++
++	/* WARNING: this is not the C library 'mktime' call, it is a built in
++	 * inline function from include/linux/time.h.  It expects (requires)
++	 * the month to be in the range 1-12
++	 */
++
++	tv.tv_sec  = mktime(tm.tm_year + 1900, tm.tm_mon + 1,
++				tm.tm_mday, tm.tm_hour,
++				tm.tm_min, tm.tm_sec);
++
++	do_settimeofday(&tv);
++
++	dev_info(&client->dev,
++		"setting the system clock to %d-%d-%d %d:%d:%d\n",
++		tm.tm_year + 1900, tm.tm_mon + 1,
++		tm.tm_mday, tm.tm_hour, tm.tm_min,
++		tm.tm_sec);
++
++	return 0;
++}
++#if 0
++struct pcf8563_limit
++{
++	unsigned char reg;
++	unsigned char mask;
++	unsigned char min;
++	unsigned char max;
++};
++
++static int pcf8563_validate_client(struct i2c_client *client)
++{
++	int i, xfer;
++
++	/* Probe array. We will read the register at the specified
++	 * address and check if the given bits are zero.
++	 */
++	static const unsigned char probe_zero_pattern[] = {
++		/* register, mask */
++		PCF8563_REG_SR,	0x18,
++		PCF8563_REG_DTR,	0xF8,
++		PCF8563_REG_ATR,	0xC0,
++		PCF8563_REG_INT,	0x18,
++		PCF8563_REG_0,	0xFF,
++	};
++
++	static const struct pcf8563_limit probe_limits_pattern[] = {
++		/* register, mask, min, max */
++		{ PCF8563_REG_Y2K,	0xFF,	19,	20	},
++		{ PCF8563_REG_DW,		0xFF,	0,	6	},
++		{ PCF8563_REG_YR,		0xFF,	0,	99	},
++		{ PCF8563_REG_MO,		0xFF,	0,	12	},
++		{ PCF8563_REG_DT,		0xFF,	0,	31	},
++		{ PCF8563_REG_HR,		0x7F,	0,	23	},
++		{ PCF8563_REG_MN,		0xFF,	0,	59	},
++		{ PCF8563_REG_SC,		0xFF,	0,	59	},
++		{ PCF8563_REG_Y2K1,	0xFF,	19,	20	},
++		{ PCF8563_REG_Y2K0,	0xFF,	19,	20	},
++	};
++
++	/* check that registers have bits at 0 where expected */
++	for (i = 0; i < ARRAY_SIZE(probe_zero_pattern); i += 2) {
++		unsigned char buf;
++
++		struct i2c_msg msgs[2] = {
++			{ client->addr, 0, 1, &probe_zero_pattern[i] },
++			{ client->addr, I2C_M_RD, 1, &buf },
++		};
++
++		xfer = i2c_transfer(client->adapter, msgs, 2);
++		if (xfer != 2) {
++			dev_err(&client->adapter->dev,
++				"%s: could not read register %x\n",
++				__FUNCTION__, probe_zero_pattern[i]);
++
++			return -EIO;
++		}
++
++		if ((buf & probe_zero_pattern[i+1]) != 0) {
++			dev_err(&client->adapter->dev,
++				"%s: register=%02x, zero pattern=%d, value=%x\n",
++				__FUNCTION__, probe_zero_pattern[i], i, buf);
++
++			return -ENODEV;
++		}
++	}
++
++	/* check limits (only registers with bcd values) */
++	for (i = 0; i < ARRAY_SIZE(probe_limits_pattern); i++) {
++		unsigned char reg, value;
++
++		struct i2c_msg msgs[2] = {
++			{ client->addr, 0, 2, &probe_limits_pattern[i].reg},
++			{ client->addr, I2C_M_RD, 1, &reg },
++		};
++
++		xfer = i2c_transfer(client->adapter, msgs, 2);
++
++		if (xfer != 2) {
++			dev_err(&client->adapter->dev,
++				"%s: could not read register %x\n",
++				__FUNCTION__, probe_limits_pattern[i].reg);
++
++			return -EIO;
++		}
++
++		value = BCD2BIN(reg & probe_limits_pattern[i].mask);
++
++		if (value > probe_limits_pattern[i].max ||
++			value < probe_limits_pattern[i].min) {
++			dev_dbg(&client->adapter->dev,
++				"%s: register=%x, lim pattern=%d, value=%d\n",
++				__FUNCTION__, probe_limits_pattern[i].reg, i, value);
++
++			return -ENODEV;
++		}
++	}
++
++	return 0;
++}
++#endif
++static int pcf8563_attach(struct i2c_adapter *adapter)
++{
++	return i2c_probe(adapter, &addr_data, pcf8563_probe);
++}
++
++static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind)
++{
++	struct i2c_client *client;
++	struct pcf8563_data *data;
++
++	int err = 0;
++
++	dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
++
++	if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
++		err = -ENODEV;
++		goto exit;
++	}
++
++	if (!(data = kzalloc(sizeof(struct pcf8563_data), GFP_KERNEL))) {
++		err = -ENOMEM;
++		goto exit;
++	}
++
++	client = &data->client;
++	client->addr = address;
++	client->driver = &pcf8563_driver;
++	client->adapter	= adapter;
++
++	strlcpy(client->name, "pcf8563", I2C_NAME_SIZE);
++
++	i2c_set_clientdata(client, data);
++
++	/* Verify the chip is really an PCF8563 */
++	if (kind < 0) {
++/*		if (pcf8563_validate_client(client) < 0) {
++			err = -ENODEV;
++			goto exit_kfree;
++		}
++*/	}
++
++	/* Inform the i2c layer */
++	if ((err = i2c_attach_client(client)))
++		goto exit_kfree;
++
++	list_add(&data->list, &pcf8563_clients);
++
++	dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
++
++	/* If requested, set the system time */
++	if (hctosys)
++		pcf8563_hctosys(client);
++
++	return 0;
++
++exit_kfree:
++	kfree(data);
++
++exit:
++	return err;
++}
++
++static int pcf8563_detach(struct i2c_client *client)
++{
++	int err;
++	struct pcf8563_data *data = i2c_get_clientdata(client);
++
++	if ((err = i2c_detach_client(client)))
++		return err;
++
++	list_del(&data->list);
++
++	kfree(data);
++
++	return 0;
++}
++
++static int pcf8563_command(struct i2c_client *client, unsigned int cmd,
++	void *param)
++{
++	if (param == NULL)
++		return -EINVAL;
++
++	if (!capable(CAP_SYS_TIME))
++		return -EACCES;
++
++	dev_dbg(&client->dev, "%s: cmd=%d\n", __FUNCTION__, cmd);
++
++	switch (cmd) {
++	case PCF8563_CMD_GETDATETIME:
++		return pcf8563_get_datetime(client, param);
++/*
++	case PCF8563_CMD_SETTIME:
++		return pcf8563_set_datetime(client, param, 0,
++				PCF8563_CCR_BASE);
++
++	case PCF8563_CMD_SETDATETIME:
++		return pcf8563_set_datetime(client, param, 1,
++				PCF8563_CCR_BASE);
++
++	case PCF8563_CMD_GETALARM:
++		return pcf8563_get_datetime(client, param, PCF8563_ALM0_BASE);
++
++	case PCF8563_CMD_SETALARM:
++		return pcf8563_set_datetime(client, param, 1,
++				PCF8563_ALM0_BASE);
 +*/
++	default:
++		return -EINVAL;
++	}
++}
++
++static int __init pcf8563_init(void)
++{
++	return i2c_add_driver(&pcf8563_driver);
++}
++
++static void __exit pcf8563_exit(void)
++{
++	i2c_del_driver(&pcf8563_driver);
++}
++
++MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
++MODULE_DESCRIPTION("Philips PCF8563 RTC driver");
++MODULE_LICENSE("GPL");
++MODULE_VERSION(DRV_VERSION);
++
++EXPORT_SYMBOL_GPL(pcf8563_do_command);
++
++module_init(pcf8563_init);
++module_exit(pcf8563_exit);
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ linux-nas100d/include/linux/pcf8563.h	2005-11-15 20:55:54.000000000 +0100
+@@ -0,0 +1,24 @@
++/*
++ *  pcf8563.h - defines for drivers/i2c/chips/pcf8563.c
++ *  Copyright 2005 Alessandro Zummo
++ *
++ *  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.
++ */
++
++#ifndef __LINUX_PCF8563_H__
++#define __LINUX_PCF8563_H__
++
++/* commands */
++
++#define PCF8563_CMD_GETDATETIME	0
++#define PCF8563_CMD_SETTIME	1
++#define PCF8563_CMD_SETDATETIME	2
++#define PCF8563_CMD_GETALARM	3
++#define PCF8563_CMD_SETALARM	4
++
++extern int pcf8563_do_command(unsigned int cmd, void *arg);
++
++#endif /* __LINUX_PCF8563_H__ */
+--- linux-nas100d.orig/drivers/i2c/chips/Kconfig	2005-11-11 22:22:43.000000000 +0100
++++ linux-nas100d/drivers/i2c/chips/Kconfig	2005-11-15 22:37:25.000000000 +0100
+@@ -126,4 +126,13 @@ config SENSORS_MAX6875
+ 	  This driver can also be built as a module.  If so, the module
+ 	  will be called max6875.
+ 
++config RTC_PCF8563_I2C
++	tristate "Philips PCF8563 RTC"
++	depends on I2C && EXPERIMENTAL
++	help
++	  If you say yes here you get support for the Philips PCF8563
++	  Real Time Clock chip. This chip is used by the Iomega NAS100D.
++
++	  This driver can also be built as a module. If so, the module
++	  will be called pcf8563.
+ endmenu
+--- linux-nas100d.orig/drivers/i2c/chips/Makefile	2005-11-11 22:22:43.000000000 +0100
++++ linux-nas100d/drivers/i2c/chips/Makefile	2005-11-15 21:11:26.000000000 +0100
+@@ -13,6 +13,7 @@ obj-$(CONFIG_SENSORS_PCF8591)	+= pcf8591
+ obj-$(CONFIG_SENSORS_RTC8564)	+= rtc8564.o
+ obj-$(CONFIG_ISP1301_OMAP)	+= isp1301_omap.o
+ obj-$(CONFIG_TPS65010)		+= tps65010.o
++obj-$(CONFIG_RTC_PCF8563_I2C)	+= pcf8563.o
+ 
+ ifeq ($(CONFIG_I2C_DEBUG_CHIP),y)
+ EXTRA_CFLAGS += -DDEBUG