rtc-ds1672.c (c1f3ee120bb61045b1c0a3ead620d1d65af47130) rtc-ds1672.c (2a4e2b8780c6df42b19c053243dada7fa4d311ee)
1/*
2 * An rtc/i2c driver for the Dallas DS1672
3 * Copyright 2005-06 Tower Technologies
4 *
5 * Author: Alessandro Zummo <a.zummo@towertech.it>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as

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45
46 struct i2c_msg msgs[] = {
47 { client->addr, 0, 1, &addr }, /* setup read ptr */
48 { client->addr, I2C_M_RD, 4, buf }, /* read date */
49 };
50
51 /* read date registers */
52 if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
1/*
2 * An rtc/i2c driver for the Dallas DS1672
3 * Copyright 2005-06 Tower Technologies
4 *
5 * Author: Alessandro Zummo <a.zummo@towertech.it>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as

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45
46 struct i2c_msg msgs[] = {
47 { client->addr, 0, 1, &addr }, /* setup read ptr */
48 { client->addr, I2C_M_RD, 4, buf }, /* read date */
49 };
50
51 /* read date registers */
52 if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
53 dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
53 dev_err(&client->dev, "%s: read error\n", __func__);
54 return -EIO;
55 }
56
57 dev_dbg(&client->dev,
58 "%s: raw read data - counters=%02x,%02x,%02x,%02x\n",
54 return -EIO;
55 }
56
57 dev_dbg(&client->dev,
58 "%s: raw read data - counters=%02x,%02x,%02x,%02x\n",
59 __FUNCTION__, buf[0], buf[1], buf[2], buf[3]);
59 __func__, buf[0], buf[1], buf[2], buf[3]);
60
61 time = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
62
63 rtc_time_to_tm(time, tm);
64
65 dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
66 "mday=%d, mon=%d, year=%d, wday=%d\n",
60
61 time = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
62
63 rtc_time_to_tm(time, tm);
64
65 dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
66 "mday=%d, mon=%d, year=%d, wday=%d\n",
67 __FUNCTION__, tm->tm_sec, tm->tm_min, tm->tm_hour,
67 __func__, tm->tm_sec, tm->tm_min, tm->tm_hour,
68 tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
69
70 return 0;
71}
72
73static int ds1672_set_mmss(struct i2c_client *client, unsigned long secs)
74{
75 int xfer;
76 unsigned char buf[6];
77
78 buf[0] = DS1672_REG_CNT_BASE;
79 buf[1] = secs & 0x000000FF;
80 buf[2] = (secs & 0x0000FF00) >> 8;
81 buf[3] = (secs & 0x00FF0000) >> 16;
82 buf[4] = (secs & 0xFF000000) >> 24;
83 buf[5] = 0; /* set control reg to enable counting */
84
85 xfer = i2c_master_send(client, buf, 6);
86 if (xfer != 6) {
68 tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
69
70 return 0;
71}
72
73static int ds1672_set_mmss(struct i2c_client *client, unsigned long secs)
74{
75 int xfer;
76 unsigned char buf[6];
77
78 buf[0] = DS1672_REG_CNT_BASE;
79 buf[1] = secs & 0x000000FF;
80 buf[2] = (secs & 0x0000FF00) >> 8;
81 buf[3] = (secs & 0x00FF0000) >> 16;
82 buf[4] = (secs & 0xFF000000) >> 24;
83 buf[5] = 0; /* set control reg to enable counting */
84
85 xfer = i2c_master_send(client, buf, 6);
86 if (xfer != 6) {
87 dev_err(&client->dev, "%s: send: %d\n", __FUNCTION__, xfer);
87 dev_err(&client->dev, "%s: send: %d\n", __func__, xfer);
88 return -EIO;
89 }
90
91 return 0;
92}
93
94static int ds1672_set_datetime(struct i2c_client *client, struct rtc_time *tm)
95{
96 unsigned long secs;
97
98 dev_dbg(&client->dev,
99 "%s: secs=%d, mins=%d, hours=%d, "
100 "mday=%d, mon=%d, year=%d, wday=%d\n",
88 return -EIO;
89 }
90
91 return 0;
92}
93
94static int ds1672_set_datetime(struct i2c_client *client, struct rtc_time *tm)
95{
96 unsigned long secs;
97
98 dev_dbg(&client->dev,
99 "%s: secs=%d, mins=%d, hours=%d, "
100 "mday=%d, mon=%d, year=%d, wday=%d\n",
101 __FUNCTION__,
101 __func__,
102 tm->tm_sec, tm->tm_min, tm->tm_hour,
103 tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
104
105 rtc_tm_to_time(tm, &secs);
106
107 return ds1672_set_mmss(client, secs);
108}
109

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128
129 struct i2c_msg msgs[] = {
130 { client->addr, 0, 1, &addr }, /* setup read ptr */
131 { client->addr, I2C_M_RD, 1, status }, /* read control */
132 };
133
134 /* read control register */
135 if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
102 tm->tm_sec, tm->tm_min, tm->tm_hour,
103 tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
104
105 rtc_tm_to_time(tm, &secs);
106
107 return ds1672_set_mmss(client, secs);
108}
109

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128
129 struct i2c_msg msgs[] = {
130 { client->addr, 0, 1, &addr }, /* setup read ptr */
131 { client->addr, I2C_M_RD, 1, status }, /* read control */
132 };
133
134 /* read control register */
135 if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
136 dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
136 dev_err(&client->dev, "%s: read error\n", __func__);
137 return -EIO;
138 }
139
140 return 0;
141}
142
143/* following are the sysfs callback functions */
144static ssize_t show_control(struct device *dev, struct device_attribute *attr, char *buf)

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194
195static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind)
196{
197 int err = 0;
198 u8 control;
199 struct i2c_client *client;
200 struct rtc_device *rtc;
201
137 return -EIO;
138 }
139
140 return 0;
141}
142
143/* following are the sysfs callback functions */
144static ssize_t show_control(struct device *dev, struct device_attribute *attr, char *buf)

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194
195static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind)
196{
197 int err = 0;
198 u8 control;
199 struct i2c_client *client;
200 struct rtc_device *rtc;
201
202 dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
202 dev_dbg(&adapter->dev, "%s\n", __func__);
203
204 if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
205 err = -ENODEV;
206 goto exit;
207 }
208
209 if (!(client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) {
210 err = -ENOMEM;

--- 72 unchanged lines hidden --- 		203
204 if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
205 err = -ENODEV;
206 goto exit;
207 }
208
209 if (!(client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) {
210 err = -ENOMEM;

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