[PATCH] RTC subsystem: I2C cleanup

This patch, completely optional, removes from drivers/i2c/chips all the
drivers that are implemented in the new RTC subsystem.

It should be noted that none of the current driver is actually integrated,
i.e.  usable without further patches.

Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 0 insertions, 385 deletions

diff --git a/drivers/i2c/chips/rtc8564.c b/drivers/i2c/chips/rtc8564.c
deleted file mode 100644
index 0d8699b3f488c..0000000000000
--- a/drivers/i2c/chips/rtc8564.c
+++ /dev/null
@@ -1,385 +0,0 @@
-/*
- *  linux/drivers/i2c/chips/rtc8564.c
- *
- *  Copyright (C) 2002-2004 Stefan Eletzhofer
- *
- *	based on linux/drivers/acron/char/pcf8583.c
- *  Copyright (C) 2000 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Driver for system3's EPSON RTC 8564 chip
- */
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/bcd.h>
-#include <linux/i2c.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/rtc.h>		/* get the user-level API */
-#include <linux/init.h>
-
-#include "rtc8564.h"
-
-#ifdef DEBUG
-# define _DBG(x, fmt, args...) do{ if (debug>=x) printk(KERN_DEBUG"%s: " fmt "\n", __FUNCTION__, ##args); } while(0);
-#else
-# define _DBG(x, fmt, args...) do { } while(0);
-#endif
-
-#define _DBGRTCTM(x, rtctm) if (debug>=x) printk("%s: secs=%d, mins=%d, hours=%d, mday=%d, " \
-			"mon=%d, year=%d, wday=%d VL=%d\n", __FUNCTION__, \
-			(rtctm).secs, (rtctm).mins, (rtctm).hours, (rtctm).mday, \
-			(rtctm).mon, (rtctm).year, (rtctm).wday, (rtctm).vl);
-
-struct rtc8564_data {
-	struct i2c_client client;
-	u16 ctrl;
-};
-
-static inline u8 _rtc8564_ctrl1(struct i2c_client *client)
-{
-	struct rtc8564_data *data = i2c_get_clientdata(client);
-	return data->ctrl & 0xff;
-}
-static inline u8 _rtc8564_ctrl2(struct i2c_client *client)
-{
-	struct rtc8564_data *data = i2c_get_clientdata(client);
-	return (data->ctrl & 0xff00) >> 8;
-}
-
-#define CTRL1(c) _rtc8564_ctrl1(c)
-#define CTRL2(c) _rtc8564_ctrl2(c)
-
-static int debug;
-module_param(debug, int, S_IRUGO | S_IWUSR);
-
-static struct i2c_driver rtc8564_driver;
-
-static unsigned short ignore[] = { I2C_CLIENT_END };
-static unsigned short normal_addr[] = { 0x51, I2C_CLIENT_END };
-
-static struct i2c_client_address_data addr_data = {
-	.normal_i2c		= normal_addr,
-	.probe			= ignore,
-	.ignore			= ignore,
-};
-
-static int rtc8564_read_mem(struct i2c_client *client, struct mem *mem);
-static int rtc8564_write_mem(struct i2c_client *client, struct mem *mem);
-
-static int rtc8564_read(struct i2c_client *client, unsigned char adr,
-			unsigned char *buf, unsigned char len)
-{
-	int ret = -EIO;
-	unsigned char addr[1] = { adr };
-	struct i2c_msg msgs[2] = {
-		{client->addr, 0, 1, addr},
-		{client->addr, I2C_M_RD, len, buf}
-	};
-
-	_DBG(1, "client=%p, adr=%d, buf=%p, len=%d", client, adr, buf, len);
-
-	if (!buf) {
-		ret = -EINVAL;
-		goto done;
-	}
-
-	ret = i2c_transfer(client->adapter, msgs, 2);
-	if (ret == 2) {
-		ret = 0;
-	}
-
-done:
-	return ret;
-}
-
-static int rtc8564_write(struct i2c_client *client, unsigned char adr,
-			 unsigned char *data, unsigned char len)
-{
-	int ret = 0;
-	unsigned char _data[16];
-	struct i2c_msg wr;
-	int i;
-
-	if (!data || len > 15) {
-		ret = -EINVAL;
-		goto done;
-	}
-
-	_DBG(1, "client=%p, adr=%d, buf=%p, len=%d", client, adr, data, len);
-
-	_data[0] = adr;
-	for (i = 0; i < len; i++) {
-		_data[i + 1] = data[i];
-		_DBG(5, "data[%d] = 0x%02x (%d)", i, data[i], data[i]);
-	}
-
-	wr.addr = client->addr;
-	wr.flags = 0;
-	wr.len = len + 1;
-	wr.buf = _data;
-
-	ret = i2c_transfer(client->adapter, &wr, 1);
-	if (ret == 1) {
-		ret = 0;
-	}
-
-done:
-	return ret;
-}
-
-static int rtc8564_attach(struct i2c_adapter *adap, int addr, int kind)
-{
-	int ret;
-	struct i2c_client *new_client;
-	struct rtc8564_data *d;
-	unsigned char data[10];
-	unsigned char ad[1] = { 0 };
-	struct i2c_msg ctrl_wr[1] = {
-		{addr, 0, 2, data}
-	};
-	struct i2c_msg ctrl_rd[2] = {
-		{addr, 0, 1, ad},
-		{addr, I2C_M_RD, 2, data}
-	};
-
-	d = kzalloc(sizeof(struct rtc8564_data), GFP_KERNEL);
-	if (!d) {
-		ret = -ENOMEM;
-		goto done;
-	}
-	new_client = &d->client;
-
-	strlcpy(new_client->name, "RTC8564", I2C_NAME_SIZE);
-	i2c_set_clientdata(new_client, d);
-	new_client->addr = addr;
-	new_client->adapter = adap;
-	new_client->driver = &rtc8564_driver;
-
-	_DBG(1, "client=%p", new_client);
-
-	/* init ctrl1 reg */
-	data[0] = 0;
-	data[1] = 0;
-	ret = i2c_transfer(new_client->adapter, ctrl_wr, 1);
-	if (ret != 1) {
-		printk(KERN_INFO "rtc8564: cant init ctrl1\n");
-		ret = -ENODEV;
-		goto done;
-	}
-
-	/* read back ctrl1 and ctrl2 */
-	ret = i2c_transfer(new_client->adapter, ctrl_rd, 2);
-	if (ret != 2) {
-		printk(KERN_INFO "rtc8564: cant read ctrl\n");
-		ret = -ENODEV;
-		goto done;
-	}
-
-	d->ctrl = data[0] | (data[1] << 8);
-
-	_DBG(1, "RTC8564_REG_CTRL1=%02x, RTC8564_REG_CTRL2=%02x",
-	     data[0], data[1]);
-
-	ret = i2c_attach_client(new_client);
-done:
-	if (ret) {
-		kfree(d);
-	}
-	return ret;
-}
-
-static int rtc8564_probe(struct i2c_adapter *adap)
-{
-	return i2c_probe(adap, &addr_data, rtc8564_attach);
-}
-
-static int rtc8564_detach(struct i2c_client *client)
-{
-	i2c_detach_client(client);
-	kfree(i2c_get_clientdata(client));
-	return 0;
-}
-
-static int rtc8564_get_datetime(struct i2c_client *client, struct rtc_tm *dt)
-{
-	int ret = -EIO;
-	unsigned char buf[15];
-
-	_DBG(1, "client=%p, dt=%p", client, dt);
-
-	if (!dt)
-		return -EINVAL;
-
-	memset(buf, 0, sizeof(buf));
-
-	ret = rtc8564_read(client, 0, buf, 15);
-	if (ret)
-		return ret;
-
-	/* century stored in minute alarm reg */
-	dt->year = BCD2BIN(buf[RTC8564_REG_YEAR]);
-	dt->year += 100 * BCD2BIN(buf[RTC8564_REG_AL_MIN] & 0x3f);
-	dt->mday = BCD2BIN(buf[RTC8564_REG_DAY] & 0x3f);
-	dt->wday = BCD2BIN(buf[RTC8564_REG_WDAY] & 7);
-	dt->mon = BCD2BIN(buf[RTC8564_REG_MON_CENT] & 0x1f);
-
-	dt->secs = BCD2BIN(buf[RTC8564_REG_SEC] & 0x7f);
-	dt->vl = (buf[RTC8564_REG_SEC] & 0x80) == 0x80;
-	dt->mins = BCD2BIN(buf[RTC8564_REG_MIN] & 0x7f);
-	dt->hours = BCD2BIN(buf[RTC8564_REG_HR] & 0x3f);
-
-	_DBGRTCTM(2, *dt);
-
-	return 0;
-}
-
-static int
-rtc8564_set_datetime(struct i2c_client *client, struct rtc_tm *dt, int datetoo)
-{
-	int ret, len = 5;
-	unsigned char buf[15];
-
-	_DBG(1, "client=%p, dt=%p", client, dt);
-
-	if (!dt)
-		return -EINVAL;
-
-	_DBGRTCTM(2, *dt);
-
-	buf[RTC8564_REG_CTRL1] = CTRL1(client) | RTC8564_CTRL1_STOP;
-	buf[RTC8564_REG_CTRL2] = CTRL2(client);
-	buf[RTC8564_REG_SEC] = BIN2BCD(dt->secs);
-	buf[RTC8564_REG_MIN] = BIN2BCD(dt->mins);
-	buf[RTC8564_REG_HR] = BIN2BCD(dt->hours);
-
-	if (datetoo) {
-		len += 5;
-		buf[RTC8564_REG_DAY] = BIN2BCD(dt->mday);
-		buf[RTC8564_REG_WDAY] = BIN2BCD(dt->wday);
-		buf[RTC8564_REG_MON_CENT] = BIN2BCD(dt->mon) & 0x1f;
-		/* century stored in minute alarm reg */
-		buf[RTC8564_REG_YEAR] = BIN2BCD(dt->year % 100);
-		buf[RTC8564_REG_AL_MIN] = BIN2BCD(dt->year / 100);
-	}
-
-	ret = rtc8564_write(client, 0, buf, len);
-	if (ret) {
-		_DBG(1, "error writing data! %d", ret);
-	}
-
-	buf[RTC8564_REG_CTRL1] = CTRL1(client);
-	ret = rtc8564_write(client, 0, buf, 1);
-	if (ret) {
-		_DBG(1, "error writing data! %d", ret);
-	}
-
-	return ret;
-}
-
-static int rtc8564_get_ctrl(struct i2c_client *client, unsigned int *ctrl)
-{
-	struct rtc8564_data *data = i2c_get_clientdata(client);
-
-	if (!ctrl)
-		return -1;
-
-	*ctrl = data->ctrl;
-	return 0;
-}
-
-static int rtc8564_set_ctrl(struct i2c_client *client, unsigned int *ctrl)
-{
-	struct rtc8564_data *data = i2c_get_clientdata(client);
-	unsigned char buf[2];
-
-	if (!ctrl)
-		return -1;
-
-	buf[0] = *ctrl & 0xff;
-	buf[1] = (*ctrl & 0xff00) >> 8;
-	data->ctrl = *ctrl;
-
-	return rtc8564_write(client, 0, buf, 2);
-}
-
-static int rtc8564_read_mem(struct i2c_client *client, struct mem *mem)
-{
-
-	if (!mem)
-		return -EINVAL;
-
-	return rtc8564_read(client, mem->loc, mem->data, mem->nr);
-}
-
-static int rtc8564_write_mem(struct i2c_client *client, struct mem *mem)
-{
-
-	if (!mem)
-		return -EINVAL;
-
-	return rtc8564_write(client, mem->loc, mem->data, mem->nr);
-}
-
-static int
-rtc8564_command(struct i2c_client *client, unsigned int cmd, void *arg)
-{
-
-	_DBG(1, "cmd=%d", cmd);
-
-	switch (cmd) {
-	case RTC_GETDATETIME:
-		return rtc8564_get_datetime(client, arg);
-
-	case RTC_SETTIME:
-		return rtc8564_set_datetime(client, arg, 0);
-
-	case RTC_SETDATETIME:
-		return rtc8564_set_datetime(client, arg, 1);
-
-	case RTC_GETCTRL:
-		return rtc8564_get_ctrl(client, arg);
-
-	case RTC_SETCTRL:
-		return rtc8564_set_ctrl(client, arg);
-
-	case MEM_READ:
-		return rtc8564_read_mem(client, arg);
-
-	case MEM_WRITE:
-		return rtc8564_write_mem(client, arg);
-
-	default:
-		return -EINVAL;
-	}
-}
-
-static struct i2c_driver rtc8564_driver = {
-	.driver = {
-		.name	= "RTC8564",
-	},
-	.id		= I2C_DRIVERID_RTC8564,
-	.attach_adapter = rtc8564_probe,
-	.detach_client	= rtc8564_detach,
-	.command	= rtc8564_command
-};
-
-static __init int rtc8564_init(void)
-{
-	return i2c_add_driver(&rtc8564_driver);
-}
-
-static __exit void rtc8564_exit(void)
-{
-	i2c_del_driver(&rtc8564_driver);
-}
-
-MODULE_AUTHOR("Stefan Eletzhofer <Stefan.Eletzhofer@eletztrick.de>");
-MODULE_DESCRIPTION("EPSON RTC8564 Driver");
-MODULE_LICENSE("GPL");
-
-module_init(rtc8564_init);
-module_exit(rtc8564_exit);