i2c: the scheduled I2C RTC driver removal

This patch contains the scheduled removal of legacy I2C RTC drivers with 
replacement drivers.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

1 files changed, 0 insertions, 267 deletions

diff --git a/drivers/i2c/chips/ds1374.c b/drivers/i2c/chips/ds1374.c
deleted file mode 100644
index 8a2ff0c114d9..000000000000
--- a/drivers/i2c/chips/ds1374.c
+++ /dev/null
@@ -1,267 +0,0 @@
-/*
- * drivers/i2c/chips/ds1374.c
- *
- * I2C client/driver for the Maxim/Dallas DS1374 Real-Time Clock
- *
- * Author: Randy Vinson <rvinson@mvista.com>
- *
- * Based on the m41t00.c by Mark Greer <mgreer@mvista.com>
- *
- * 2005 (c) MontaVista Software, Inc. This file is licensed under
- * the terms of the GNU General Public License version 2. This program
- * is licensed "as is" without any warranty of any kind, whether express
- * or implied.
- */
-/*
- * This i2c client/driver wedges between the drivers/char/genrtc.c RTC
- * interface and the SMBus interface of the i2c subsystem.
- * It would be more efficient to use i2c msgs/i2c_transfer directly but, as
- * recommened in .../Documentation/i2c/writing-clients section
- * "Sending and receiving", using SMBus level communication is preferred.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/i2c.h>
-#include <linux/rtc.h>
-#include <linux/bcd.h>
-#include <linux/mutex.h>
-#include <linux/workqueue.h>
-
-#define DS1374_REG_TOD0         0x00
-#define DS1374_REG_TOD1         0x01
-#define DS1374_REG_TOD2         0x02
-#define DS1374_REG_TOD3         0x03
-#define DS1374_REG_WDALM0       0x04
-#define DS1374_REG_WDALM1       0x05
-#define DS1374_REG_WDALM2       0x06
-#define DS1374_REG_CR           0x07
-#define DS1374_REG_SR           0x08
-#define DS1374_REG_SR_OSF       0x80
-#define DS1374_REG_TCR          0x09
-
-#define DS1374_DRV_NAME         "ds1374"
-
-static DEFINE_MUTEX(ds1374_mutex);
-
-static struct i2c_driver ds1374_driver;
-static struct i2c_client *save_client;
-
-static unsigned short ignore[] = { I2C_CLIENT_END };
-static unsigned short normal_addr[] = { 0x68, I2C_CLIENT_END };
-
-static struct i2c_client_address_data addr_data = {
-        .normal_i2c = normal_addr,
-        .probe = ignore,
-        .ignore = ignore,
-};
-
-static ulong ds1374_read_rtc(void)
-{
-        ulong time = 0;
-        int reg = DS1374_REG_WDALM0;
-
-        while (reg--) {
-                s32 tmp;
-                if ((tmp = i2c_smbus_read_byte_data(save_client, reg)) < 0) {
-                        dev_warn(&save_client->dev,
-                                 "can't read from rtc chip\n");
-                        return 0;
-                }
-                time = (time << 8) | (tmp & 0xff);
-        }
-        return time;
-}
-
-static void ds1374_write_rtc(ulong time)
-{
-        int reg;
-
-        for (reg = DS1374_REG_TOD0; reg < DS1374_REG_WDALM0; reg++) {
-                if (i2c_smbus_write_byte_data(save_client, reg, time & 0xff)
-                    < 0) {
-                        dev_warn(&save_client->dev,
-                                 "can't write to rtc chip\n");
-                        break;
-                }
-                time = time >> 8;
-        }
-}
-
-static void ds1374_check_rtc_status(void)
-{
-        s32 tmp;
-
-        tmp = i2c_smbus_read_byte_data(save_client, DS1374_REG_SR);
-        if (tmp < 0) {
-                dev_warn(&save_client->dev,
-                         "can't read status from rtc chip\n");
-                return;
-        }
-        if (tmp & DS1374_REG_SR_OSF) {
-                dev_warn(&save_client->dev,
-                         "oscillator discontinuity flagged, time unreliable\n");
-                tmp &= ~DS1374_REG_SR_OSF;
-                tmp = i2c_smbus_write_byte_data(save_client, DS1374_REG_SR,
-                                                tmp & 0xff);
-                if (tmp < 0)
-                        dev_warn(&save_client->dev,
-                                 "can't clear discontinuity notification\n");
-        }
-}
-
-ulong ds1374_get_rtc_time(void)
-{
-        ulong t1, t2;
-        int limit = 10;         /* arbitrary retry limit */
-
-        mutex_lock(&ds1374_mutex);
-
-        /*
-         * Since the reads are being performed one byte at a time using
-         * the SMBus vs a 4-byte i2c transfer, there is a chance that a
-         * carry will occur during the read. To detect this, 2 reads are
-         * performed and compared.
-         */
-        do {
-                t1 = ds1374_read_rtc();
-                t2 = ds1374_read_rtc();
-        } while (t1 != t2 && limit--);
-
-        mutex_unlock(&ds1374_mutex);
-
-        if (t1 != t2) {
-                dev_warn(&save_client->dev,
-                         "can't get consistent time from rtc chip\n");
-                t1 = 0;
-        }
-
-        return t1;
-}
-
-static ulong new_time;
-
-static void ds1374_set_work(struct work_struct *work)
-{
-        ulong t1, t2;
-        int limit = 10;         /* arbitrary retry limit */
-
-        t1 = new_time;
-
-        mutex_lock(&ds1374_mutex);
-
-        /*
-         * Since the writes are being performed one byte at a time using
-         * the SMBus vs a 4-byte i2c transfer, there is a chance that a
-         * carry will occur during the write. To detect this, the write
-         * value is read back and compared.
-         */
-        do {
-                ds1374_write_rtc(t1);
-                t2 = ds1374_read_rtc();
-        } while (t1 != t2 && limit--);
-
-        mutex_unlock(&ds1374_mutex);
-
-        if (t1 != t2)
-                dev_warn(&save_client->dev,
-                         "can't confirm time set from rtc chip\n");
-}
-
-static struct workqueue_struct *ds1374_workqueue;
-
-static DECLARE_WORK(ds1374_work, ds1374_set_work);
-
-int ds1374_set_rtc_time(ulong nowtime)
-{
-        new_time = nowtime;
-
-        if (in_interrupt())
-                queue_work(ds1374_workqueue, &ds1374_work);
-        else
-                ds1374_set_work(NULL);
-
-        return 0;
-}
-
-/*
- *****************************************************************************
- *
- *      Driver Interface
- *
- *****************************************************************************
- */
-static int ds1374_probe(struct i2c_adapter *adap, int addr, int kind)
-{
-        struct i2c_client *client;
-        int rc;
-
-        client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
-        if (!client)
-                return -ENOMEM;
-
-        strncpy(client->name, DS1374_DRV_NAME, I2C_NAME_SIZE);
-        client->addr = addr;
-        client->adapter = adap;
-        client->driver = &ds1374_driver;
-
-        ds1374_workqueue = create_singlethread_workqueue("ds1374");
-        if (!ds1374_workqueue) {
-                kfree(client);
-                return -ENOMEM; /* most expected reason */
-        }
-
-        if ((rc = i2c_attach_client(client)) != 0) {
-                kfree(client);
-                return rc;
-        }
-
-        save_client = client;
-
-        ds1374_check_rtc_status();
-
-        return 0;
-}
-
-static int ds1374_attach(struct i2c_adapter *adap)
-{
-        return i2c_probe(adap, &addr_data, ds1374_probe);
-}
-
-static int ds1374_detach(struct i2c_client *client)
-{
-        int rc;
-
-        if ((rc = i2c_detach_client(client)) == 0) {
-                kfree(i2c_get_clientdata(client));
-                destroy_workqueue(ds1374_workqueue);
-        }
-        return rc;
-}
-
-static struct i2c_driver ds1374_driver = {
-        .driver = {
-                .name   = DS1374_DRV_NAME,
-        },
-        .id = I2C_DRIVERID_DS1374,
-        .attach_adapter = ds1374_attach,
-        .detach_client = ds1374_detach,
-};
-
-static int __init ds1374_init(void)
-{
-        return i2c_add_driver(&ds1374_driver);
-}
-
-static void __exit ds1374_exit(void)
-{
-        i2c_del_driver(&ds1374_driver);
-}
-
-module_init(ds1374_init);
-module_exit(ds1374_exit);
-
-MODULE_AUTHOR("Randy Vinson <rvinson@mvista.com>");
-MODULE_DESCRIPTION("Maxim/Dallas DS1374 RTC I2C Client Driver");
-MODULE_LICENSE("GPL");