Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 1 | /* |
| 2 | * An i2c driver for the Xicor/Intersil X1205 RTC |
| 3 | * Copyright 2004 Karen Spearel |
| 4 | * Copyright 2005 Alessandro Zummo |
| 5 | * |
| 6 | * please send all reports to: |
Sachin Kamat | 66e3f10 | 2013-07-03 15:06:07 -0700 | [diff] [blame] | 7 | * Karen Spearel <kas111 at gmail dot com> |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 8 | * Alessandro Zummo <a.zummo@towertech.it> |
| 9 | * |
| 10 | * based on a lot of other RTC drivers. |
| 11 | * |
Jean Delvare | 890e037 | 2007-07-12 14:12:28 +0200 | [diff] [blame] | 12 | * Information and datasheet: |
| 13 | * http://www.intersil.com/cda/deviceinfo/0,1477,X1205,00.html |
| 14 | * |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 15 | * This program is free software; you can redistribute it and/or modify |
| 16 | * it under the terms of the GNU General Public License version 2 as |
| 17 | * published by the Free Software Foundation. |
| 18 | */ |
| 19 | |
| 20 | #include <linux/i2c.h> |
| 21 | #include <linux/bcd.h> |
| 22 | #include <linux/rtc.h> |
| 23 | #include <linux/delay.h> |
Paul Gortmaker | 2113852 | 2011-05-27 09:57:25 -0400 | [diff] [blame] | 24 | #include <linux/module.h> |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 25 | |
Alessandro Zummo | 4edac2b | 2008-04-28 02:11:54 -0700 | [diff] [blame] | 26 | #define DRV_VERSION "1.0.8" |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 27 | |
| 28 | /* offsets into CCR area */ |
| 29 | |
| 30 | #define CCR_SEC 0 |
| 31 | #define CCR_MIN 1 |
| 32 | #define CCR_HOUR 2 |
| 33 | #define CCR_MDAY 3 |
| 34 | #define CCR_MONTH 4 |
| 35 | #define CCR_YEAR 5 |
| 36 | #define CCR_WDAY 6 |
| 37 | #define CCR_Y2K 7 |
| 38 | |
| 39 | #define X1205_REG_SR 0x3F /* status register */ |
| 40 | #define X1205_REG_Y2K 0x37 |
| 41 | #define X1205_REG_DW 0x36 |
| 42 | #define X1205_REG_YR 0x35 |
| 43 | #define X1205_REG_MO 0x34 |
| 44 | #define X1205_REG_DT 0x33 |
| 45 | #define X1205_REG_HR 0x32 |
| 46 | #define X1205_REG_MN 0x31 |
| 47 | #define X1205_REG_SC 0x30 |
| 48 | #define X1205_REG_DTR 0x13 |
| 49 | #define X1205_REG_ATR 0x12 |
| 50 | #define X1205_REG_INT 0x11 |
| 51 | #define X1205_REG_0 0x10 |
| 52 | #define X1205_REG_Y2K1 0x0F |
| 53 | #define X1205_REG_DWA1 0x0E |
| 54 | #define X1205_REG_YRA1 0x0D |
| 55 | #define X1205_REG_MOA1 0x0C |
| 56 | #define X1205_REG_DTA1 0x0B |
| 57 | #define X1205_REG_HRA1 0x0A |
| 58 | #define X1205_REG_MNA1 0x09 |
| 59 | #define X1205_REG_SCA1 0x08 |
| 60 | #define X1205_REG_Y2K0 0x07 |
| 61 | #define X1205_REG_DWA0 0x06 |
| 62 | #define X1205_REG_YRA0 0x05 |
| 63 | #define X1205_REG_MOA0 0x04 |
| 64 | #define X1205_REG_DTA0 0x03 |
| 65 | #define X1205_REG_HRA0 0x02 |
| 66 | #define X1205_REG_MNA0 0x01 |
| 67 | #define X1205_REG_SCA0 0x00 |
| 68 | |
| 69 | #define X1205_CCR_BASE 0x30 /* Base address of CCR */ |
| 70 | #define X1205_ALM0_BASE 0x00 /* Base address of ALARM0 */ |
| 71 | |
| 72 | #define X1205_SR_RTCF 0x01 /* Clock failure */ |
| 73 | #define X1205_SR_WEL 0x02 /* Write Enable Latch */ |
| 74 | #define X1205_SR_RWEL 0x04 /* Register Write Enable */ |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 75 | #define X1205_SR_AL0 0x20 /* Alarm 0 match */ |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 76 | |
| 77 | #define X1205_DTR_DTR0 0x01 |
| 78 | #define X1205_DTR_DTR1 0x02 |
| 79 | #define X1205_DTR_DTR2 0x04 |
| 80 | |
| 81 | #define X1205_HR_MIL 0x80 /* Set in ccr.hour for 24 hr mode */ |
| 82 | |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 83 | #define X1205_INT_AL0E 0x20 /* Alarm 0 enable */ |
| 84 | |
Alessandro Zummo | 4edac2b | 2008-04-28 02:11:54 -0700 | [diff] [blame] | 85 | static struct i2c_driver x1205_driver; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 86 | |
| 87 | /* |
| 88 | * In the routines that deal directly with the x1205 hardware, we use |
| 89 | * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch |
| 90 | * Epoch is initialized as 2000. Time is set to UTC. |
| 91 | */ |
| 92 | static int x1205_get_datetime(struct i2c_client *client, struct rtc_time *tm, |
| 93 | unsigned char reg_base) |
| 94 | { |
| 95 | unsigned char dt_addr[2] = { 0, reg_base }; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 96 | unsigned char buf[8]; |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 97 | int i; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 98 | |
| 99 | struct i2c_msg msgs[] = { |
Shubhrajyoti D | c3fe92b | 2012-10-04 17:14:18 -0700 | [diff] [blame] | 100 | {/* setup read ptr */ |
| 101 | .addr = client->addr, |
| 102 | .len = 2, |
| 103 | .buf = dt_addr |
| 104 | }, |
| 105 | {/* read date */ |
| 106 | .addr = client->addr, |
| 107 | .flags = I2C_M_RD, |
| 108 | .len = 8, |
| 109 | .buf = buf |
| 110 | }, |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 111 | }; |
| 112 | |
| 113 | /* read date registers */ |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 114 | if (i2c_transfer(client->adapter, &msgs[0], 2) != 2) { |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 115 | dev_err(&client->dev, "%s: read error\n", __func__); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 116 | return -EIO; |
| 117 | } |
| 118 | |
| 119 | dev_dbg(&client->dev, |
| 120 | "%s: raw read data - sec=%02x, min=%02x, hr=%02x, " |
| 121 | "mday=%02x, mon=%02x, year=%02x, wday=%02x, y2k=%02x\n", |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 122 | __func__, |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 123 | buf[0], buf[1], buf[2], buf[3], |
| 124 | buf[4], buf[5], buf[6], buf[7]); |
| 125 | |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 126 | /* Mask out the enable bits if these are alarm registers */ |
| 127 | if (reg_base < X1205_CCR_BASE) |
| 128 | for (i = 0; i <= 4; i++) |
| 129 | buf[i] &= 0x7F; |
| 130 | |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 131 | tm->tm_sec = bcd2bin(buf[CCR_SEC]); |
| 132 | tm->tm_min = bcd2bin(buf[CCR_MIN]); |
| 133 | tm->tm_hour = bcd2bin(buf[CCR_HOUR] & 0x3F); /* hr is 0-23 */ |
| 134 | tm->tm_mday = bcd2bin(buf[CCR_MDAY]); |
| 135 | tm->tm_mon = bcd2bin(buf[CCR_MONTH]) - 1; /* mon is 0-11 */ |
| 136 | tm->tm_year = bcd2bin(buf[CCR_YEAR]) |
| 137 | + (bcd2bin(buf[CCR_Y2K]) * 100) - 1900; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 138 | tm->tm_wday = buf[CCR_WDAY]; |
| 139 | |
| 140 | dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, " |
| 141 | "mday=%d, mon=%d, year=%d, wday=%d\n", |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 142 | __func__, |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 143 | tm->tm_sec, tm->tm_min, tm->tm_hour, |
| 144 | tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); |
| 145 | |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | static int x1205_get_status(struct i2c_client *client, unsigned char *sr) |
| 150 | { |
| 151 | static unsigned char sr_addr[2] = { 0, X1205_REG_SR }; |
| 152 | |
| 153 | struct i2c_msg msgs[] = { |
Shubhrajyoti D | c3fe92b | 2012-10-04 17:14:18 -0700 | [diff] [blame] | 154 | { /* setup read ptr */ |
| 155 | .addr = client->addr, |
| 156 | .len = 2, |
| 157 | .buf = sr_addr |
| 158 | }, |
| 159 | { /* read status */ |
| 160 | .addr = client->addr, |
| 161 | .flags = I2C_M_RD, |
| 162 | .len = 1, |
| 163 | .buf = sr |
| 164 | }, |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 165 | }; |
| 166 | |
| 167 | /* read status register */ |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 168 | if (i2c_transfer(client->adapter, &msgs[0], 2) != 2) { |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 169 | dev_err(&client->dev, "%s: read error\n", __func__); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 170 | return -EIO; |
| 171 | } |
| 172 | |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | static int x1205_set_datetime(struct i2c_client *client, struct rtc_time *tm, |
Johannes Weiner | d973b63 | 2009-12-15 16:46:16 -0800 | [diff] [blame] | 177 | u8 reg_base, unsigned char alm_enable) |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 178 | { |
Johannes Weiner | d973b63 | 2009-12-15 16:46:16 -0800 | [diff] [blame] | 179 | int i, xfer; |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 180 | unsigned char rdata[10] = { 0, reg_base }; |
Johannes Weiner | d973b63 | 2009-12-15 16:46:16 -0800 | [diff] [blame] | 181 | unsigned char *buf = rdata + 2; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 182 | |
| 183 | static const unsigned char wel[3] = { 0, X1205_REG_SR, |
| 184 | X1205_SR_WEL }; |
| 185 | |
| 186 | static const unsigned char rwel[3] = { 0, X1205_REG_SR, |
| 187 | X1205_SR_WEL | X1205_SR_RWEL }; |
| 188 | |
| 189 | static const unsigned char diswe[3] = { 0, X1205_REG_SR, 0 }; |
| 190 | |
| 191 | dev_dbg(&client->dev, |
Johannes Weiner | d973b63 | 2009-12-15 16:46:16 -0800 | [diff] [blame] | 192 | "%s: sec=%d min=%d hour=%d mday=%d mon=%d year=%d wday=%d\n", |
| 193 | __func__, tm->tm_sec, tm->tm_min, tm->tm_hour, tm->tm_mday, |
| 194 | tm->tm_mon, tm->tm_year, tm->tm_wday); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 195 | |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 196 | buf[CCR_SEC] = bin2bcd(tm->tm_sec); |
| 197 | buf[CCR_MIN] = bin2bcd(tm->tm_min); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 198 | |
| 199 | /* set hour and 24hr bit */ |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 200 | buf[CCR_HOUR] = bin2bcd(tm->tm_hour) | X1205_HR_MIL; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 201 | |
Johannes Weiner | d973b63 | 2009-12-15 16:46:16 -0800 | [diff] [blame] | 202 | buf[CCR_MDAY] = bin2bcd(tm->tm_mday); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 203 | |
Johannes Weiner | d973b63 | 2009-12-15 16:46:16 -0800 | [diff] [blame] | 204 | /* month, 1 - 12 */ |
| 205 | buf[CCR_MONTH] = bin2bcd(tm->tm_mon + 1); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 206 | |
Johannes Weiner | d973b63 | 2009-12-15 16:46:16 -0800 | [diff] [blame] | 207 | /* year, since the rtc epoch*/ |
| 208 | buf[CCR_YEAR] = bin2bcd(tm->tm_year % 100); |
| 209 | buf[CCR_WDAY] = tm->tm_wday & 0x07; |
| 210 | buf[CCR_Y2K] = bin2bcd((tm->tm_year + 1900) / 100); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 211 | |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 212 | /* If writing alarm registers, set compare bits on registers 0-4 */ |
| 213 | if (reg_base < X1205_CCR_BASE) |
| 214 | for (i = 0; i <= 4; i++) |
| 215 | buf[i] |= 0x80; |
| 216 | |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 217 | /* this sequence is required to unlock the chip */ |
Sachin Kamat | 66e3f10 | 2013-07-03 15:06:07 -0700 | [diff] [blame] | 218 | xfer = i2c_master_send(client, wel, 3); |
| 219 | if (xfer != 3) { |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 220 | dev_err(&client->dev, "%s: wel - %d\n", __func__, xfer); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 221 | return -EIO; |
| 222 | } |
| 223 | |
Sachin Kamat | 66e3f10 | 2013-07-03 15:06:07 -0700 | [diff] [blame] | 224 | xfer = i2c_master_send(client, rwel, 3); |
| 225 | if (xfer != 3) { |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 226 | dev_err(&client->dev, "%s: rwel - %d\n", __func__, xfer); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 227 | return -EIO; |
| 228 | } |
| 229 | |
Johannes Weiner | d973b63 | 2009-12-15 16:46:16 -0800 | [diff] [blame] | 230 | xfer = i2c_master_send(client, rdata, sizeof(rdata)); |
| 231 | if (xfer != sizeof(rdata)) { |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 232 | dev_err(&client->dev, |
| 233 | "%s: result=%d addr=%02x, data=%02x\n", |
| 234 | __func__, |
| 235 | xfer, rdata[1], rdata[2]); |
| 236 | return -EIO; |
| 237 | } |
| 238 | |
| 239 | /* If we wrote to the nonvolatile region, wait 10msec for write cycle*/ |
| 240 | if (reg_base < X1205_CCR_BASE) { |
| 241 | unsigned char al0e[3] = { 0, X1205_REG_INT, 0 }; |
| 242 | |
| 243 | msleep(10); |
| 244 | |
| 245 | /* ...and set or clear the AL0E bit in the INT register */ |
| 246 | |
| 247 | /* Need to set RWEL again as the write has cleared it */ |
| 248 | xfer = i2c_master_send(client, rwel, 3); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 249 | if (xfer != 3) { |
| 250 | dev_err(&client->dev, |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 251 | "%s: aloe rwel - %d\n", |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 252 | __func__, |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 253 | xfer); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 254 | return -EIO; |
| 255 | } |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 256 | |
| 257 | if (alm_enable) |
| 258 | al0e[2] = X1205_INT_AL0E; |
| 259 | |
| 260 | xfer = i2c_master_send(client, al0e, 3); |
| 261 | if (xfer != 3) { |
| 262 | dev_err(&client->dev, |
| 263 | "%s: al0e - %d\n", |
| 264 | __func__, |
| 265 | xfer); |
| 266 | return -EIO; |
| 267 | } |
| 268 | |
| 269 | /* and wait 10msec again for this write to complete */ |
| 270 | msleep(10); |
| 271 | } |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 272 | |
| 273 | /* disable further writes */ |
Sachin Kamat | 66e3f10 | 2013-07-03 15:06:07 -0700 | [diff] [blame] | 274 | xfer = i2c_master_send(client, diswe, 3); |
| 275 | if (xfer != 3) { |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 276 | dev_err(&client->dev, "%s: diswe - %d\n", __func__, xfer); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 277 | return -EIO; |
| 278 | } |
| 279 | |
| 280 | return 0; |
| 281 | } |
| 282 | |
| 283 | static int x1205_fix_osc(struct i2c_client *client) |
| 284 | { |
| 285 | int err; |
| 286 | struct rtc_time tm; |
| 287 | |
Johannes Weiner | cb8799e | 2009-12-01 13:17:49 -0800 | [diff] [blame] | 288 | memset(&tm, 0, sizeof(tm)); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 289 | |
Johannes Weiner | d973b63 | 2009-12-15 16:46:16 -0800 | [diff] [blame] | 290 | err = x1205_set_datetime(client, &tm, X1205_CCR_BASE, 0); |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 291 | if (err < 0) |
| 292 | dev_err(&client->dev, "unable to restart the oscillator\n"); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 293 | |
| 294 | return err; |
| 295 | } |
| 296 | |
| 297 | static int x1205_get_dtrim(struct i2c_client *client, int *trim) |
| 298 | { |
| 299 | unsigned char dtr; |
| 300 | static unsigned char dtr_addr[2] = { 0, X1205_REG_DTR }; |
| 301 | |
| 302 | struct i2c_msg msgs[] = { |
Shubhrajyoti D | c3fe92b | 2012-10-04 17:14:18 -0700 | [diff] [blame] | 303 | { /* setup read ptr */ |
| 304 | .addr = client->addr, |
| 305 | .len = 2, |
| 306 | .buf = dtr_addr |
| 307 | }, |
| 308 | { /* read dtr */ |
| 309 | .addr = client->addr, |
| 310 | .flags = I2C_M_RD, |
| 311 | .len = 1, |
| 312 | .buf = &dtr |
| 313 | }, |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 314 | }; |
| 315 | |
| 316 | /* read dtr register */ |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 317 | if (i2c_transfer(client->adapter, &msgs[0], 2) != 2) { |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 318 | dev_err(&client->dev, "%s: read error\n", __func__); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 319 | return -EIO; |
| 320 | } |
| 321 | |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 322 | dev_dbg(&client->dev, "%s: raw dtr=%x\n", __func__, dtr); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 323 | |
| 324 | *trim = 0; |
| 325 | |
| 326 | if (dtr & X1205_DTR_DTR0) |
| 327 | *trim += 20; |
| 328 | |
| 329 | if (dtr & X1205_DTR_DTR1) |
| 330 | *trim += 10; |
| 331 | |
| 332 | if (dtr & X1205_DTR_DTR2) |
| 333 | *trim = -*trim; |
| 334 | |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | static int x1205_get_atrim(struct i2c_client *client, int *trim) |
| 339 | { |
| 340 | s8 atr; |
| 341 | static unsigned char atr_addr[2] = { 0, X1205_REG_ATR }; |
| 342 | |
| 343 | struct i2c_msg msgs[] = { |
Shubhrajyoti D | c3fe92b | 2012-10-04 17:14:18 -0700 | [diff] [blame] | 344 | {/* setup read ptr */ |
| 345 | .addr = client->addr, |
| 346 | .len = 2, |
| 347 | .buf = atr_addr |
| 348 | }, |
| 349 | {/* read atr */ |
| 350 | .addr = client->addr, |
| 351 | .flags = I2C_M_RD, |
| 352 | .len = 1, |
| 353 | .buf = &atr |
| 354 | }, |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 355 | }; |
| 356 | |
| 357 | /* read atr register */ |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 358 | if (i2c_transfer(client->adapter, &msgs[0], 2) != 2) { |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 359 | dev_err(&client->dev, "%s: read error\n", __func__); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 360 | return -EIO; |
| 361 | } |
| 362 | |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 363 | dev_dbg(&client->dev, "%s: raw atr=%x\n", __func__, atr); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 364 | |
| 365 | /* atr is a two's complement value on 6 bits, |
| 366 | * perform sign extension. The formula is |
| 367 | * Catr = (atr * 0.25pF) + 11.00pF. |
| 368 | */ |
| 369 | if (atr & 0x20) |
| 370 | atr |= 0xC0; |
| 371 | |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 372 | dev_dbg(&client->dev, "%s: raw atr=%x (%d)\n", __func__, atr, atr); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 373 | |
| 374 | *trim = (atr * 250) + 11000; |
| 375 | |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 376 | dev_dbg(&client->dev, "%s: real=%d\n", __func__, *trim); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 377 | |
| 378 | return 0; |
| 379 | } |
| 380 | |
Sachin Kamat | 66e3f10 | 2013-07-03 15:06:07 -0700 | [diff] [blame] | 381 | struct x1205_limit { |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 382 | unsigned char reg, mask, min, max; |
| 383 | }; |
| 384 | |
| 385 | static int x1205_validate_client(struct i2c_client *client) |
| 386 | { |
| 387 | int i, xfer; |
| 388 | |
| 389 | /* Probe array. We will read the register at the specified |
| 390 | * address and check if the given bits are zero. |
| 391 | */ |
| 392 | static const unsigned char probe_zero_pattern[] = { |
| 393 | /* register, mask */ |
| 394 | X1205_REG_SR, 0x18, |
| 395 | X1205_REG_DTR, 0xF8, |
| 396 | X1205_REG_ATR, 0xC0, |
| 397 | X1205_REG_INT, 0x18, |
| 398 | X1205_REG_0, 0xFF, |
| 399 | }; |
| 400 | |
| 401 | static const struct x1205_limit probe_limits_pattern[] = { |
| 402 | /* register, mask, min, max */ |
| 403 | { X1205_REG_Y2K, 0xFF, 19, 20 }, |
| 404 | { X1205_REG_DW, 0xFF, 0, 6 }, |
| 405 | { X1205_REG_YR, 0xFF, 0, 99 }, |
| 406 | { X1205_REG_MO, 0xFF, 0, 12 }, |
| 407 | { X1205_REG_DT, 0xFF, 0, 31 }, |
| 408 | { X1205_REG_HR, 0x7F, 0, 23 }, |
| 409 | { X1205_REG_MN, 0xFF, 0, 59 }, |
| 410 | { X1205_REG_SC, 0xFF, 0, 59 }, |
| 411 | { X1205_REG_Y2K1, 0xFF, 19, 20 }, |
| 412 | { X1205_REG_Y2K0, 0xFF, 19, 20 }, |
| 413 | }; |
| 414 | |
| 415 | /* check that registers have bits a 0 where expected */ |
| 416 | for (i = 0; i < ARRAY_SIZE(probe_zero_pattern); i += 2) { |
| 417 | unsigned char buf; |
| 418 | |
| 419 | unsigned char addr[2] = { 0, probe_zero_pattern[i] }; |
| 420 | |
| 421 | struct i2c_msg msgs[2] = { |
Shubhrajyoti D | c3fe92b | 2012-10-04 17:14:18 -0700 | [diff] [blame] | 422 | { |
| 423 | .addr = client->addr, |
| 424 | .len = 2, |
| 425 | .buf = addr |
| 426 | }, |
| 427 | { |
| 428 | .addr = client->addr, |
| 429 | .flags = I2C_M_RD, |
| 430 | .len = 1, |
| 431 | .buf = &buf |
| 432 | }, |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 433 | }; |
| 434 | |
Sachin Kamat | 66e3f10 | 2013-07-03 15:06:07 -0700 | [diff] [blame] | 435 | xfer = i2c_transfer(client->adapter, msgs, 2); |
| 436 | if (xfer != 2) { |
David Brownell | a14e189 | 2006-12-10 02:19:02 -0800 | [diff] [blame] | 437 | dev_err(&client->dev, |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 438 | "%s: could not read register %x\n", |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 439 | __func__, probe_zero_pattern[i]); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 440 | |
| 441 | return -EIO; |
| 442 | } |
| 443 | |
| 444 | if ((buf & probe_zero_pattern[i+1]) != 0) { |
David Brownell | a14e189 | 2006-12-10 02:19:02 -0800 | [diff] [blame] | 445 | dev_err(&client->dev, |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 446 | "%s: register=%02x, zero pattern=%d, value=%x\n", |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 447 | __func__, probe_zero_pattern[i], i, buf); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 448 | |
| 449 | return -ENODEV; |
| 450 | } |
| 451 | } |
| 452 | |
| 453 | /* check limits (only registers with bcd values) */ |
| 454 | for (i = 0; i < ARRAY_SIZE(probe_limits_pattern); i++) { |
| 455 | unsigned char reg, value; |
| 456 | |
| 457 | unsigned char addr[2] = { 0, probe_limits_pattern[i].reg }; |
| 458 | |
| 459 | struct i2c_msg msgs[2] = { |
Shubhrajyoti D | c3fe92b | 2012-10-04 17:14:18 -0700 | [diff] [blame] | 460 | { |
| 461 | .addr = client->addr, |
| 462 | .len = 2, |
| 463 | .buf = addr |
| 464 | }, |
| 465 | { |
| 466 | .addr = client->addr, |
| 467 | .flags = I2C_M_RD, |
| 468 | .len = 1, |
| 469 | .buf = ® |
| 470 | }, |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 471 | }; |
| 472 | |
Sachin Kamat | 66e3f10 | 2013-07-03 15:06:07 -0700 | [diff] [blame] | 473 | xfer = i2c_transfer(client->adapter, msgs, 2); |
| 474 | if (xfer != 2) { |
David Brownell | a14e189 | 2006-12-10 02:19:02 -0800 | [diff] [blame] | 475 | dev_err(&client->dev, |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 476 | "%s: could not read register %x\n", |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 477 | __func__, probe_limits_pattern[i].reg); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 478 | |
| 479 | return -EIO; |
| 480 | } |
| 481 | |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 482 | value = bcd2bin(reg & probe_limits_pattern[i].mask); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 483 | |
| 484 | if (value > probe_limits_pattern[i].max || |
| 485 | value < probe_limits_pattern[i].min) { |
David Brownell | a14e189 | 2006-12-10 02:19:02 -0800 | [diff] [blame] | 486 | dev_dbg(&client->dev, |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 487 | "%s: register=%x, lim pattern=%d, value=%d\n", |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 488 | __func__, probe_limits_pattern[i].reg, |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 489 | i, value); |
| 490 | |
| 491 | return -ENODEV; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | return 0; |
| 496 | } |
| 497 | |
| 498 | static int x1205_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) |
| 499 | { |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 500 | int err; |
| 501 | unsigned char intreg, status; |
| 502 | static unsigned char int_addr[2] = { 0, X1205_REG_INT }; |
| 503 | struct i2c_client *client = to_i2c_client(dev); |
| 504 | struct i2c_msg msgs[] = { |
Shubhrajyoti D | c3fe92b | 2012-10-04 17:14:18 -0700 | [diff] [blame] | 505 | { /* setup read ptr */ |
| 506 | .addr = client->addr, |
| 507 | .len = 2, |
| 508 | .buf = int_addr |
| 509 | }, |
| 510 | {/* read INT register */ |
| 511 | |
| 512 | .addr = client->addr, |
| 513 | .flags = I2C_M_RD, |
| 514 | .len = 1, |
| 515 | .buf = &intreg |
| 516 | }, |
Michael Hamel | 471d47e | 2008-07-04 09:59:30 -0700 | [diff] [blame] | 517 | }; |
| 518 | |
| 519 | /* read interrupt register and status register */ |
| 520 | if (i2c_transfer(client->adapter, &msgs[0], 2) != 2) { |
| 521 | dev_err(&client->dev, "%s: read error\n", __func__); |
| 522 | return -EIO; |
| 523 | } |
| 524 | err = x1205_get_status(client, &status); |
| 525 | if (err == 0) { |
| 526 | alrm->pending = (status & X1205_SR_AL0) ? 1 : 0; |
| 527 | alrm->enabled = (intreg & X1205_INT_AL0E) ? 1 : 0; |
| 528 | err = x1205_get_datetime(client, &alrm->time, X1205_ALM0_BASE); |
| 529 | } |
| 530 | return err; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 531 | } |
| 532 | |
| 533 | static int x1205_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) |
| 534 | { |
| 535 | return x1205_set_datetime(to_i2c_client(dev), |
Johannes Weiner | d973b63 | 2009-12-15 16:46:16 -0800 | [diff] [blame] | 536 | &alrm->time, X1205_ALM0_BASE, alrm->enabled); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | static int x1205_rtc_read_time(struct device *dev, struct rtc_time *tm) |
| 540 | { |
| 541 | return x1205_get_datetime(to_i2c_client(dev), |
| 542 | tm, X1205_CCR_BASE); |
| 543 | } |
| 544 | |
| 545 | static int x1205_rtc_set_time(struct device *dev, struct rtc_time *tm) |
| 546 | { |
| 547 | return x1205_set_datetime(to_i2c_client(dev), |
Johannes Weiner | d973b63 | 2009-12-15 16:46:16 -0800 | [diff] [blame] | 548 | tm, X1205_CCR_BASE, 0); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 549 | } |
| 550 | |
| 551 | static int x1205_rtc_proc(struct device *dev, struct seq_file *seq) |
| 552 | { |
| 553 | int err, dtrim, atrim; |
| 554 | |
Sachin Kamat | 66e3f10 | 2013-07-03 15:06:07 -0700 | [diff] [blame] | 555 | err = x1205_get_dtrim(to_i2c_client(dev), &dtrim); |
| 556 | if (!err) |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 557 | seq_printf(seq, "digital_trim\t: %d ppm\n", dtrim); |
| 558 | |
Sachin Kamat | 66e3f10 | 2013-07-03 15:06:07 -0700 | [diff] [blame] | 559 | err = x1205_get_atrim(to_i2c_client(dev), &atrim); |
| 560 | if (!err) |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 561 | seq_printf(seq, "analog_trim\t: %d.%02d pF\n", |
| 562 | atrim / 1000, atrim % 1000); |
| 563 | return 0; |
| 564 | } |
| 565 | |
David Brownell | ff8371a | 2006-09-30 23:28:17 -0700 | [diff] [blame] | 566 | static const struct rtc_class_ops x1205_rtc_ops = { |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 567 | .proc = x1205_rtc_proc, |
| 568 | .read_time = x1205_rtc_read_time, |
| 569 | .set_time = x1205_rtc_set_time, |
| 570 | .read_alarm = x1205_rtc_read_alarm, |
| 571 | .set_alarm = x1205_rtc_set_alarm, |
| 572 | }; |
| 573 | |
| 574 | static ssize_t x1205_sysfs_show_atrim(struct device *dev, |
| 575 | struct device_attribute *attr, char *buf) |
| 576 | { |
Alessandro Zummo | 015aefb | 2006-04-10 22:54:42 -0700 | [diff] [blame] | 577 | int err, atrim; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 578 | |
Alessandro Zummo | 015aefb | 2006-04-10 22:54:42 -0700 | [diff] [blame] | 579 | err = x1205_get_atrim(to_i2c_client(dev), &atrim); |
| 580 | if (err) |
| 581 | return err; |
| 582 | |
| 583 | return sprintf(buf, "%d.%02d pF\n", atrim / 1000, atrim % 1000); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 584 | } |
| 585 | static DEVICE_ATTR(atrim, S_IRUGO, x1205_sysfs_show_atrim, NULL); |
| 586 | |
| 587 | static ssize_t x1205_sysfs_show_dtrim(struct device *dev, |
| 588 | struct device_attribute *attr, char *buf) |
| 589 | { |
Alessandro Zummo | 015aefb | 2006-04-10 22:54:42 -0700 | [diff] [blame] | 590 | int err, dtrim; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 591 | |
Alessandro Zummo | 015aefb | 2006-04-10 22:54:42 -0700 | [diff] [blame] | 592 | err = x1205_get_dtrim(to_i2c_client(dev), &dtrim); |
| 593 | if (err) |
| 594 | return err; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 595 | |
Alessandro Zummo | 015aefb | 2006-04-10 22:54:42 -0700 | [diff] [blame] | 596 | return sprintf(buf, "%d ppm\n", dtrim); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 597 | } |
| 598 | static DEVICE_ATTR(dtrim, S_IRUGO, x1205_sysfs_show_dtrim, NULL); |
| 599 | |
Alessandro Zummo | 4edac2b | 2008-04-28 02:11:54 -0700 | [diff] [blame] | 600 | static int x1205_sysfs_register(struct device *dev) |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 601 | { |
Alessandro Zummo | 4edac2b | 2008-04-28 02:11:54 -0700 | [diff] [blame] | 602 | int err; |
| 603 | |
| 604 | err = device_create_file(dev, &dev_attr_atrim); |
| 605 | if (err) |
| 606 | return err; |
| 607 | |
| 608 | err = device_create_file(dev, &dev_attr_dtrim); |
| 609 | if (err) |
| 610 | device_remove_file(dev, &dev_attr_atrim); |
| 611 | |
| 612 | return err; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 613 | } |
| 614 | |
Alessandro Zummo | 4edac2b | 2008-04-28 02:11:54 -0700 | [diff] [blame] | 615 | static void x1205_sysfs_unregister(struct device *dev) |
| 616 | { |
| 617 | device_remove_file(dev, &dev_attr_atrim); |
| 618 | device_remove_file(dev, &dev_attr_dtrim); |
| 619 | } |
| 620 | |
| 621 | |
Jean Delvare | d2653e9 | 2008-04-29 23:11:39 +0200 | [diff] [blame] | 622 | static int x1205_probe(struct i2c_client *client, |
| 623 | const struct i2c_device_id *id) |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 624 | { |
| 625 | int err = 0; |
| 626 | unsigned char sr; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 627 | struct rtc_device *rtc; |
| 628 | |
Alessandro Zummo | 4edac2b | 2008-04-28 02:11:54 -0700 | [diff] [blame] | 629 | dev_dbg(&client->dev, "%s\n", __func__); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 630 | |
Alessandro Zummo | 4edac2b | 2008-04-28 02:11:54 -0700 | [diff] [blame] | 631 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) |
| 632 | return -ENODEV; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 633 | |
Alessandro Zummo | 4edac2b | 2008-04-28 02:11:54 -0700 | [diff] [blame] | 634 | if (x1205_validate_client(client) < 0) |
| 635 | return -ENODEV; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 636 | |
| 637 | dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); |
| 638 | |
Jingoo Han | 1758171 | 2013-04-29 16:19:55 -0700 | [diff] [blame] | 639 | rtc = devm_rtc_device_register(&client->dev, x1205_driver.driver.name, |
| 640 | &x1205_rtc_ops, THIS_MODULE); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 641 | |
Alessandro Zummo | 4edac2b | 2008-04-28 02:11:54 -0700 | [diff] [blame] | 642 | if (IS_ERR(rtc)) |
| 643 | return PTR_ERR(rtc); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 644 | |
| 645 | i2c_set_clientdata(client, rtc); |
| 646 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 647 | /* Check for power failures and eventually enable the osc */ |
Sachin Kamat | 66e3f10 | 2013-07-03 15:06:07 -0700 | [diff] [blame] | 648 | err = x1205_get_status(client, &sr); |
| 649 | if (!err) { |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 650 | if (sr & X1205_SR_RTCF) { |
| 651 | dev_err(&client->dev, |
| 652 | "power failure detected, " |
| 653 | "please set the clock\n"); |
| 654 | udelay(50); |
| 655 | x1205_fix_osc(client); |
| 656 | } |
Sachin Kamat | 66e3f10 | 2013-07-03 15:06:07 -0700 | [diff] [blame] | 657 | } else { |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 658 | dev_err(&client->dev, "couldn't read status\n"); |
Sachin Kamat | 66e3f10 | 2013-07-03 15:06:07 -0700 | [diff] [blame] | 659 | } |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 660 | |
Alessandro Zummo | 4edac2b | 2008-04-28 02:11:54 -0700 | [diff] [blame] | 661 | err = x1205_sysfs_register(&client->dev); |
| 662 | if (err) |
Jingoo Han | 1758171 | 2013-04-29 16:19:55 -0700 | [diff] [blame] | 663 | return err; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 664 | |
| 665 | return 0; |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 666 | } |
| 667 | |
Alessandro Zummo | 4edac2b | 2008-04-28 02:11:54 -0700 | [diff] [blame] | 668 | static int x1205_remove(struct i2c_client *client) |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 669 | { |
Alessandro Zummo | 4edac2b | 2008-04-28 02:11:54 -0700 | [diff] [blame] | 670 | x1205_sysfs_unregister(&client->dev); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 671 | return 0; |
| 672 | } |
| 673 | |
Jean Delvare | 3760f73 | 2008-04-29 23:11:40 +0200 | [diff] [blame] | 674 | static const struct i2c_device_id x1205_id[] = { |
| 675 | { "x1205", 0 }, |
| 676 | { } |
| 677 | }; |
| 678 | MODULE_DEVICE_TABLE(i2c, x1205_id); |
| 679 | |
Alessandro Zummo | 4edac2b | 2008-04-28 02:11:54 -0700 | [diff] [blame] | 680 | static struct i2c_driver x1205_driver = { |
| 681 | .driver = { |
| 682 | .name = "rtc-x1205", |
| 683 | }, |
| 684 | .probe = x1205_probe, |
| 685 | .remove = x1205_remove, |
Jean Delvare | 3760f73 | 2008-04-29 23:11:40 +0200 | [diff] [blame] | 686 | .id_table = x1205_id, |
Alessandro Zummo | 4edac2b | 2008-04-28 02:11:54 -0700 | [diff] [blame] | 687 | }; |
| 688 | |
Axel Lin | 0abc920 | 2012-03-23 15:02:31 -0700 | [diff] [blame] | 689 | module_i2c_driver(x1205_driver); |
Alessandro Zummo | 1fec7c6 | 2006-03-27 01:16:42 -0800 | [diff] [blame] | 690 | |
| 691 | MODULE_AUTHOR( |
| 692 | "Karen Spearel <kas111 at gmail dot com>, " |
| 693 | "Alessandro Zummo <a.zummo@towertech.it>"); |
| 694 | MODULE_DESCRIPTION("Xicor/Intersil X1205 RTC driver"); |
| 695 | MODULE_LICENSE("GPL"); |
| 696 | MODULE_VERSION(DRV_VERSION); |