Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 1 | /* |
Paul Mundt | 37fc5e2 | 2008-10-15 22:03:03 -0700 | [diff] [blame] | 2 | * An I2C driver for Ricoh RS5C372, R2025S/D and RV5C38[67] RTCs |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2005 Pavel Mironchik <pmironchik@optifacio.net> |
| 5 | * Copyright (C) 2006 Tower Technologies |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 6 | * Copyright (C) 2008 Paul Mundt |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/i2c.h> |
| 14 | #include <linux/rtc.h> |
| 15 | #include <linux/bcd.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 16 | #include <linux/slab.h> |
Paul Gortmaker | 2113852 | 2011-05-27 09:57:25 -0400 | [diff] [blame] | 17 | #include <linux/module.h> |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 18 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 19 | /* |
| 20 | * Ricoh has a family of I2C based RTCs, which differ only slightly from |
| 21 | * each other. Differences center on pinout (e.g. how many interrupts, |
| 22 | * output clock, etc) and how the control registers are used. The '372 |
| 23 | * is significant only because that's the one this driver first supported. |
| 24 | */ |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 25 | #define RS5C372_REG_SECS 0 |
| 26 | #define RS5C372_REG_MINS 1 |
| 27 | #define RS5C372_REG_HOURS 2 |
| 28 | #define RS5C372_REG_WDAY 3 |
| 29 | #define RS5C372_REG_DAY 4 |
| 30 | #define RS5C372_REG_MONTH 5 |
| 31 | #define RS5C372_REG_YEAR 6 |
| 32 | #define RS5C372_REG_TRIM 7 |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 33 | # define RS5C372_TRIM_XSL 0x80 |
| 34 | # define RS5C372_TRIM_MASK 0x7F |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 35 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 36 | #define RS5C_REG_ALARM_A_MIN 8 /* or ALARM_W */ |
| 37 | #define RS5C_REG_ALARM_A_HOURS 9 |
| 38 | #define RS5C_REG_ALARM_A_WDAY 10 |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 39 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 40 | #define RS5C_REG_ALARM_B_MIN 11 /* or ALARM_D */ |
| 41 | #define RS5C_REG_ALARM_B_HOURS 12 |
| 42 | #define RS5C_REG_ALARM_B_WDAY 13 /* (ALARM_B only) */ |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 43 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 44 | #define RS5C_REG_CTRL1 14 |
| 45 | # define RS5C_CTRL1_AALE (1 << 7) /* or WALE */ |
| 46 | # define RS5C_CTRL1_BALE (1 << 6) /* or DALE */ |
| 47 | # define RV5C387_CTRL1_24 (1 << 5) |
| 48 | # define RS5C372A_CTRL1_SL1 (1 << 5) |
| 49 | # define RS5C_CTRL1_CT_MASK (7 << 0) |
| 50 | # define RS5C_CTRL1_CT0 (0 << 0) /* no periodic irq */ |
| 51 | # define RS5C_CTRL1_CT4 (4 << 0) /* 1 Hz level irq */ |
| 52 | #define RS5C_REG_CTRL2 15 |
| 53 | # define RS5C372_CTRL2_24 (1 << 5) |
Paul Mundt | 37fc5e2 | 2008-10-15 22:03:03 -0700 | [diff] [blame] | 54 | # define R2025_CTRL2_XST (1 << 5) |
| 55 | # define RS5C_CTRL2_XSTP (1 << 4) /* only if !R2025S/D */ |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 56 | # define RS5C_CTRL2_CTFG (1 << 2) |
| 57 | # define RS5C_CTRL2_AAFG (1 << 1) /* or WAFG */ |
| 58 | # define RS5C_CTRL2_BAFG (1 << 0) /* or DAFG */ |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 59 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 60 | |
| 61 | /* to read (style 1) or write registers starting at R */ |
| 62 | #define RS5C_ADDR(R) (((R) << 4) | 0) |
| 63 | |
| 64 | |
| 65 | enum rtc_type { |
| 66 | rtc_undef = 0, |
Paul Mundt | 37fc5e2 | 2008-10-15 22:03:03 -0700 | [diff] [blame] | 67 | rtc_r2025sd, |
Lucas Stach | 550fcb8 | 2013-05-07 16:18:11 -0700 | [diff] [blame] | 68 | rtc_r2221tl, |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 69 | rtc_rs5c372a, |
| 70 | rtc_rs5c372b, |
| 71 | rtc_rv5c386, |
| 72 | rtc_rv5c387a, |
| 73 | }; |
| 74 | |
Jean Delvare | 3760f73 | 2008-04-29 23:11:40 +0200 | [diff] [blame] | 75 | static const struct i2c_device_id rs5c372_id[] = { |
Paul Mundt | 37fc5e2 | 2008-10-15 22:03:03 -0700 | [diff] [blame] | 76 | { "r2025sd", rtc_r2025sd }, |
Lucas Stach | 550fcb8 | 2013-05-07 16:18:11 -0700 | [diff] [blame] | 77 | { "r2221tl", rtc_r2221tl }, |
Jean Delvare | 3760f73 | 2008-04-29 23:11:40 +0200 | [diff] [blame] | 78 | { "rs5c372a", rtc_rs5c372a }, |
| 79 | { "rs5c372b", rtc_rs5c372b }, |
| 80 | { "rv5c386", rtc_rv5c386 }, |
| 81 | { "rv5c387a", rtc_rv5c387a }, |
| 82 | { } |
| 83 | }; |
| 84 | MODULE_DEVICE_TABLE(i2c, rs5c372_id); |
| 85 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 86 | /* REVISIT: this assumes that: |
| 87 | * - we're in the 21st century, so it's safe to ignore the century |
| 88 | * bit for rv5c38[67] (REG_MONTH bit 7); |
| 89 | * - we should use ALARM_A not ALARM_B (may be wrong on some boards) |
| 90 | */ |
Riku Voipio | c6f24f9 | 2006-12-06 20:39:13 -0800 | [diff] [blame] | 91 | struct rs5c372 { |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 92 | struct i2c_client *client; |
| 93 | struct rtc_device *rtc; |
| 94 | enum rtc_type type; |
| 95 | unsigned time24:1; |
| 96 | unsigned has_irq:1; |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 97 | unsigned smbus:1; |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 98 | char buf[17]; |
| 99 | char *regs; |
Riku Voipio | c6f24f9 | 2006-12-06 20:39:13 -0800 | [diff] [blame] | 100 | }; |
| 101 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 102 | static int rs5c_get_regs(struct rs5c372 *rs5c) |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 103 | { |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 104 | struct i2c_client *client = rs5c->client; |
| 105 | struct i2c_msg msgs[] = { |
Shubhrajyoti D | a606757 | 2012-10-04 17:14:22 -0700 | [diff] [blame] | 106 | { |
| 107 | .addr = client->addr, |
| 108 | .flags = I2C_M_RD, |
| 109 | .len = sizeof(rs5c->buf), |
| 110 | .buf = rs5c->buf |
| 111 | }, |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 112 | }; |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 113 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 114 | /* This implements the third reading method from the datasheet, using |
| 115 | * an internal address that's reset after each transaction (by STOP) |
| 116 | * to 0x0f ... so we read extra registers, and skip the first one. |
| 117 | * |
| 118 | * The first method doesn't work with the iop3xx adapter driver, on at |
| 119 | * least 80219 chips; this works around that bug. |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 120 | * |
| 121 | * The third method on the other hand doesn't work for the SMBus-only |
| 122 | * configurations, so we use the the first method there, stripping off |
| 123 | * the extra register in the process. |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 124 | */ |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 125 | if (rs5c->smbus) { |
| 126 | int addr = RS5C_ADDR(RS5C372_REG_SECS); |
| 127 | int size = sizeof(rs5c->buf) - 1; |
| 128 | |
| 129 | if (i2c_smbus_read_i2c_block_data(client, addr, size, |
| 130 | rs5c->buf + 1) != size) { |
| 131 | dev_warn(&client->dev, "can't read registers\n"); |
| 132 | return -EIO; |
| 133 | } |
| 134 | } else { |
| 135 | if ((i2c_transfer(client->adapter, msgs, 1)) != 1) { |
| 136 | dev_warn(&client->dev, "can't read registers\n"); |
| 137 | return -EIO; |
| 138 | } |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 139 | } |
| 140 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 141 | dev_dbg(&client->dev, |
Andy Shevchenko | b513e52 | 2014-10-13 15:53:12 -0700 | [diff] [blame] | 142 | "%3ph (%02x) %3ph (%02x), %3ph, %3ph; %02x %02x\n", |
| 143 | rs5c->regs + 0, rs5c->regs[3], |
| 144 | rs5c->regs + 4, rs5c->regs[7], |
| 145 | rs5c->regs + 8, rs5c->regs + 11, |
| 146 | rs5c->regs[14], rs5c->regs[15]); |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 147 | |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | static unsigned rs5c_reg2hr(struct rs5c372 *rs5c, unsigned reg) |
| 152 | { |
| 153 | unsigned hour; |
| 154 | |
| 155 | if (rs5c->time24) |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 156 | return bcd2bin(reg & 0x3f); |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 157 | |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 158 | hour = bcd2bin(reg & 0x1f); |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 159 | if (hour == 12) |
| 160 | hour = 0; |
| 161 | if (reg & 0x20) |
| 162 | hour += 12; |
| 163 | return hour; |
| 164 | } |
| 165 | |
| 166 | static unsigned rs5c_hr2reg(struct rs5c372 *rs5c, unsigned hour) |
| 167 | { |
| 168 | if (rs5c->time24) |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 169 | return bin2bcd(hour); |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 170 | |
| 171 | if (hour > 12) |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 172 | return 0x20 | bin2bcd(hour - 12); |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 173 | if (hour == 12) |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 174 | return 0x20 | bin2bcd(12); |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 175 | if (hour == 0) |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 176 | return bin2bcd(12); |
| 177 | return bin2bcd(hour); |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | static int rs5c372_get_datetime(struct i2c_client *client, struct rtc_time *tm) |
| 181 | { |
| 182 | struct rs5c372 *rs5c = i2c_get_clientdata(client); |
| 183 | int status = rs5c_get_regs(rs5c); |
| 184 | |
| 185 | if (status < 0) |
| 186 | return status; |
| 187 | |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 188 | tm->tm_sec = bcd2bin(rs5c->regs[RS5C372_REG_SECS] & 0x7f); |
| 189 | tm->tm_min = bcd2bin(rs5c->regs[RS5C372_REG_MINS] & 0x7f); |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 190 | tm->tm_hour = rs5c_reg2hr(rs5c, rs5c->regs[RS5C372_REG_HOURS]); |
| 191 | |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 192 | tm->tm_wday = bcd2bin(rs5c->regs[RS5C372_REG_WDAY] & 0x07); |
| 193 | tm->tm_mday = bcd2bin(rs5c->regs[RS5C372_REG_DAY] & 0x3f); |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 194 | |
| 195 | /* tm->tm_mon is zero-based */ |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 196 | tm->tm_mon = bcd2bin(rs5c->regs[RS5C372_REG_MONTH] & 0x1f) - 1; |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 197 | |
| 198 | /* year is 1900 + tm->tm_year */ |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 199 | tm->tm_year = bcd2bin(rs5c->regs[RS5C372_REG_YEAR]) + 100; |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 200 | |
| 201 | dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, " |
| 202 | "mday=%d, mon=%d, year=%d, wday=%d\n", |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 203 | __func__, |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 204 | tm->tm_sec, tm->tm_min, tm->tm_hour, |
| 205 | tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); |
| 206 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 207 | /* rtc might need initialization */ |
| 208 | return rtc_valid_tm(tm); |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | static int rs5c372_set_datetime(struct i2c_client *client, struct rtc_time *tm) |
| 212 | { |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 213 | struct rs5c372 *rs5c = i2c_get_clientdata(client); |
Wolfram Sang | 1183649 | 2010-12-21 17:24:24 -0800 | [diff] [blame] | 214 | unsigned char buf[7]; |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 215 | int addr; |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 216 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 217 | dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d " |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 218 | "mday=%d, mon=%d, year=%d, wday=%d\n", |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 219 | __func__, |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 220 | tm->tm_sec, tm->tm_min, tm->tm_hour, |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 221 | tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); |
| 222 | |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 223 | addr = RS5C_ADDR(RS5C372_REG_SECS); |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 224 | buf[0] = bin2bcd(tm->tm_sec); |
| 225 | buf[1] = bin2bcd(tm->tm_min); |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 226 | buf[2] = rs5c_hr2reg(rs5c, tm->tm_hour); |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 227 | buf[3] = bin2bcd(tm->tm_wday); |
| 228 | buf[4] = bin2bcd(tm->tm_mday); |
| 229 | buf[5] = bin2bcd(tm->tm_mon + 1); |
| 230 | buf[6] = bin2bcd(tm->tm_year - 100); |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 231 | |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 232 | if (i2c_smbus_write_i2c_block_data(client, addr, sizeof(buf), buf) < 0) { |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 233 | dev_err(&client->dev, "%s: write error\n", __func__); |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 234 | return -EIO; |
| 235 | } |
| 236 | |
| 237 | return 0; |
| 238 | } |
| 239 | |
Javier Martinez Canillas | 6fca3fc | 2016-04-26 18:17:35 -0400 | [diff] [blame] | 240 | #if IS_ENABLED(CONFIG_RTC_INTF_PROC) |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 241 | #define NEED_TRIM |
| 242 | #endif |
| 243 | |
Javier Martinez Canillas | 6fca3fc | 2016-04-26 18:17:35 -0400 | [diff] [blame] | 244 | #if IS_ENABLED(CONFIG_RTC_INTF_SYSFS) |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 245 | #define NEED_TRIM |
| 246 | #endif |
| 247 | |
| 248 | #ifdef NEED_TRIM |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 249 | static int rs5c372_get_trim(struct i2c_client *client, int *osc, int *trim) |
| 250 | { |
Riku Voipio | c6f24f9 | 2006-12-06 20:39:13 -0800 | [diff] [blame] | 251 | struct rs5c372 *rs5c372 = i2c_get_clientdata(client); |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 252 | u8 tmp = rs5c372->regs[RS5C372_REG_TRIM]; |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 253 | |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 254 | if (osc) |
Riku Voipio | c6f24f9 | 2006-12-06 20:39:13 -0800 | [diff] [blame] | 255 | *osc = (tmp & RS5C372_TRIM_XSL) ? 32000 : 32768; |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 256 | |
Adrian Bunk | 17ad78e | 2006-11-25 11:09:29 -0800 | [diff] [blame] | 257 | if (trim) { |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 258 | dev_dbg(&client->dev, "%s: raw trim=%x\n", __func__, tmp); |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 259 | tmp &= RS5C372_TRIM_MASK; |
| 260 | if (tmp & 0x3e) { |
| 261 | int t = tmp & 0x3f; |
| 262 | |
| 263 | if (tmp & 0x40) |
| 264 | t = (~t | (s8)0xc0) + 1; |
| 265 | else |
| 266 | t = t - 1; |
| 267 | |
| 268 | tmp = t * 2; |
| 269 | } else |
| 270 | tmp = 0; |
| 271 | *trim = tmp; |
Adrian Bunk | 17ad78e | 2006-11-25 11:09:29 -0800 | [diff] [blame] | 272 | } |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 273 | |
| 274 | return 0; |
| 275 | } |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 276 | #endif |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 277 | |
| 278 | static int rs5c372_rtc_read_time(struct device *dev, struct rtc_time *tm) |
| 279 | { |
| 280 | return rs5c372_get_datetime(to_i2c_client(dev), tm); |
| 281 | } |
| 282 | |
| 283 | static int rs5c372_rtc_set_time(struct device *dev, struct rtc_time *tm) |
| 284 | { |
| 285 | return rs5c372_set_datetime(to_i2c_client(dev), tm); |
| 286 | } |
| 287 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 288 | |
John Stultz | 16380c1 | 2011-02-02 17:02:41 -0800 | [diff] [blame] | 289 | static int rs5c_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) |
| 290 | { |
| 291 | struct i2c_client *client = to_i2c_client(dev); |
| 292 | struct rs5c372 *rs5c = i2c_get_clientdata(client); |
| 293 | unsigned char buf; |
| 294 | int status, addr; |
| 295 | |
| 296 | buf = rs5c->regs[RS5C_REG_CTRL1]; |
| 297 | |
| 298 | if (!rs5c->has_irq) |
| 299 | return -EINVAL; |
| 300 | |
| 301 | status = rs5c_get_regs(rs5c); |
| 302 | if (status < 0) |
| 303 | return status; |
| 304 | |
| 305 | addr = RS5C_ADDR(RS5C_REG_CTRL1); |
| 306 | if (enabled) |
| 307 | buf |= RS5C_CTRL1_AALE; |
| 308 | else |
| 309 | buf &= ~RS5C_CTRL1_AALE; |
| 310 | |
| 311 | if (i2c_smbus_write_byte_data(client, addr, buf) < 0) { |
Jingoo Han | 0c6516e | 2013-02-21 16:45:27 -0800 | [diff] [blame] | 312 | dev_warn(dev, "can't update alarm\n"); |
John Stultz | 16380c1 | 2011-02-02 17:02:41 -0800 | [diff] [blame] | 313 | status = -EIO; |
| 314 | } else |
| 315 | rs5c->regs[RS5C_REG_CTRL1] = buf; |
| 316 | |
| 317 | return status; |
| 318 | } |
| 319 | |
| 320 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 321 | /* NOTE: Since RTC_WKALM_{RD,SET} were originally defined for EFI, |
| 322 | * which only exposes a polled programming interface; and since |
| 323 | * these calls map directly to those EFI requests; we don't demand |
| 324 | * we have an IRQ for this chip when we go through this API. |
| 325 | * |
| 326 | * The older x86_pc derived RTC_ALM_{READ,SET} calls require irqs |
| 327 | * though, managed through RTC_AIE_{ON,OFF} requests. |
| 328 | */ |
| 329 | |
| 330 | static int rs5c_read_alarm(struct device *dev, struct rtc_wkalrm *t) |
| 331 | { |
| 332 | struct i2c_client *client = to_i2c_client(dev); |
| 333 | struct rs5c372 *rs5c = i2c_get_clientdata(client); |
| 334 | int status; |
| 335 | |
| 336 | status = rs5c_get_regs(rs5c); |
| 337 | if (status < 0) |
| 338 | return status; |
| 339 | |
| 340 | /* report alarm time */ |
| 341 | t->time.tm_sec = 0; |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 342 | t->time.tm_min = bcd2bin(rs5c->regs[RS5C_REG_ALARM_A_MIN] & 0x7f); |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 343 | t->time.tm_hour = rs5c_reg2hr(rs5c, rs5c->regs[RS5C_REG_ALARM_A_HOURS]); |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 344 | |
| 345 | /* ... and status */ |
| 346 | t->enabled = !!(rs5c->regs[RS5C_REG_CTRL1] & RS5C_CTRL1_AALE); |
| 347 | t->pending = !!(rs5c->regs[RS5C_REG_CTRL2] & RS5C_CTRL2_AAFG); |
| 348 | |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | static int rs5c_set_alarm(struct device *dev, struct rtc_wkalrm *t) |
| 353 | { |
| 354 | struct i2c_client *client = to_i2c_client(dev); |
| 355 | struct rs5c372 *rs5c = i2c_get_clientdata(client); |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 356 | int status, addr, i; |
| 357 | unsigned char buf[3]; |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 358 | |
| 359 | /* only handle up to 24 hours in the future, like RTC_ALM_SET */ |
| 360 | if (t->time.tm_mday != -1 |
| 361 | || t->time.tm_mon != -1 |
| 362 | || t->time.tm_year != -1) |
| 363 | return -EINVAL; |
| 364 | |
| 365 | /* REVISIT: round up tm_sec */ |
| 366 | |
| 367 | /* if needed, disable irq (clears pending status) */ |
| 368 | status = rs5c_get_regs(rs5c); |
| 369 | if (status < 0) |
| 370 | return status; |
| 371 | if (rs5c->regs[RS5C_REG_CTRL1] & RS5C_CTRL1_AALE) { |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 372 | addr = RS5C_ADDR(RS5C_REG_CTRL1); |
| 373 | buf[0] = rs5c->regs[RS5C_REG_CTRL1] & ~RS5C_CTRL1_AALE; |
| 374 | if (i2c_smbus_write_byte_data(client, addr, buf[0]) < 0) { |
Jingoo Han | 0c6516e | 2013-02-21 16:45:27 -0800 | [diff] [blame] | 375 | dev_dbg(dev, "can't disable alarm\n"); |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 376 | return -EIO; |
| 377 | } |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 378 | rs5c->regs[RS5C_REG_CTRL1] = buf[0]; |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 379 | } |
| 380 | |
| 381 | /* set alarm */ |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 382 | buf[0] = bin2bcd(t->time.tm_min); |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 383 | buf[1] = rs5c_hr2reg(rs5c, t->time.tm_hour); |
| 384 | buf[2] = 0x7f; /* any/all days */ |
| 385 | |
| 386 | for (i = 0; i < sizeof(buf); i++) { |
| 387 | addr = RS5C_ADDR(RS5C_REG_ALARM_A_MIN + i); |
| 388 | if (i2c_smbus_write_byte_data(client, addr, buf[i]) < 0) { |
Jingoo Han | 0c6516e | 2013-02-21 16:45:27 -0800 | [diff] [blame] | 389 | dev_dbg(dev, "can't set alarm time\n"); |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 390 | return -EIO; |
| 391 | } |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | /* ... and maybe enable its irq */ |
| 395 | if (t->enabled) { |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 396 | addr = RS5C_ADDR(RS5C_REG_CTRL1); |
| 397 | buf[0] = rs5c->regs[RS5C_REG_CTRL1] | RS5C_CTRL1_AALE; |
| 398 | if (i2c_smbus_write_byte_data(client, addr, buf[0]) < 0) |
Jingoo Han | 0c6516e | 2013-02-21 16:45:27 -0800 | [diff] [blame] | 399 | dev_warn(dev, "can't enable alarm\n"); |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 400 | rs5c->regs[RS5C_REG_CTRL1] = buf[0]; |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | return 0; |
| 404 | } |
| 405 | |
Javier Martinez Canillas | 6fca3fc | 2016-04-26 18:17:35 -0400 | [diff] [blame] | 406 | #if IS_ENABLED(CONFIG_RTC_INTF_PROC) |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 407 | |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 408 | static int rs5c372_rtc_proc(struct device *dev, struct seq_file *seq) |
| 409 | { |
| 410 | int err, osc, trim; |
| 411 | |
Alessandro Zummo | adfb434 | 2006-04-10 22:54:43 -0700 | [diff] [blame] | 412 | err = rs5c372_get_trim(to_i2c_client(dev), &osc, &trim); |
| 413 | if (err == 0) { |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 414 | seq_printf(seq, "crystal\t\t: %d.%03d KHz\n", |
| 415 | osc / 1000, osc % 1000); |
| 416 | seq_printf(seq, "trim\t\t: %d\n", trim); |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 417 | } |
| 418 | |
| 419 | return 0; |
| 420 | } |
| 421 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 422 | #else |
| 423 | #define rs5c372_rtc_proc NULL |
| 424 | #endif |
| 425 | |
David Brownell | ff8371a | 2006-09-30 23:28:17 -0700 | [diff] [blame] | 426 | static const struct rtc_class_ops rs5c372_rtc_ops = { |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 427 | .proc = rs5c372_rtc_proc, |
| 428 | .read_time = rs5c372_rtc_read_time, |
| 429 | .set_time = rs5c372_rtc_set_time, |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 430 | .read_alarm = rs5c_read_alarm, |
| 431 | .set_alarm = rs5c_set_alarm, |
John Stultz | 16380c1 | 2011-02-02 17:02:41 -0800 | [diff] [blame] | 432 | .alarm_irq_enable = rs5c_rtc_alarm_irq_enable, |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 433 | }; |
| 434 | |
Javier Martinez Canillas | 6fca3fc | 2016-04-26 18:17:35 -0400 | [diff] [blame] | 435 | #if IS_ENABLED(CONFIG_RTC_INTF_SYSFS) |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 436 | |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 437 | static ssize_t rs5c372_sysfs_show_trim(struct device *dev, |
| 438 | struct device_attribute *attr, char *buf) |
| 439 | { |
Alessandro Zummo | 8289607 | 2006-04-10 22:54:44 -0700 | [diff] [blame] | 440 | int err, trim; |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 441 | |
Alessandro Zummo | 8289607 | 2006-04-10 22:54:44 -0700 | [diff] [blame] | 442 | err = rs5c372_get_trim(to_i2c_client(dev), NULL, &trim); |
| 443 | if (err) |
| 444 | return err; |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 445 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 446 | return sprintf(buf, "%d\n", trim); |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 447 | } |
| 448 | static DEVICE_ATTR(trim, S_IRUGO, rs5c372_sysfs_show_trim, NULL); |
| 449 | |
| 450 | static ssize_t rs5c372_sysfs_show_osc(struct device *dev, |
| 451 | struct device_attribute *attr, char *buf) |
| 452 | { |
Alessandro Zummo | 8289607 | 2006-04-10 22:54:44 -0700 | [diff] [blame] | 453 | int err, osc; |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 454 | |
Alessandro Zummo | 8289607 | 2006-04-10 22:54:44 -0700 | [diff] [blame] | 455 | err = rs5c372_get_trim(to_i2c_client(dev), &osc, NULL); |
| 456 | if (err) |
| 457 | return err; |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 458 | |
Alessandro Zummo | 8289607 | 2006-04-10 22:54:44 -0700 | [diff] [blame] | 459 | return sprintf(buf, "%d.%03d KHz\n", osc / 1000, osc % 1000); |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 460 | } |
| 461 | static DEVICE_ATTR(osc, S_IRUGO, rs5c372_sysfs_show_osc, NULL); |
| 462 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 463 | static int rs5c_sysfs_register(struct device *dev) |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 464 | { |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 465 | int err; |
| 466 | |
| 467 | err = device_create_file(dev, &dev_attr_trim); |
| 468 | if (err) |
| 469 | return err; |
| 470 | err = device_create_file(dev, &dev_attr_osc); |
| 471 | if (err) |
| 472 | device_remove_file(dev, &dev_attr_trim); |
| 473 | |
| 474 | return err; |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 475 | } |
| 476 | |
David Brownell | d815461 | 2007-07-17 04:04:55 -0700 | [diff] [blame] | 477 | static void rs5c_sysfs_unregister(struct device *dev) |
| 478 | { |
| 479 | device_remove_file(dev, &dev_attr_trim); |
| 480 | device_remove_file(dev, &dev_attr_osc); |
| 481 | } |
| 482 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 483 | #else |
| 484 | static int rs5c_sysfs_register(struct device *dev) |
| 485 | { |
| 486 | return 0; |
| 487 | } |
David Brownell | d815461 | 2007-07-17 04:04:55 -0700 | [diff] [blame] | 488 | |
| 489 | static void rs5c_sysfs_unregister(struct device *dev) |
| 490 | { |
| 491 | /* nothing */ |
| 492 | } |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 493 | #endif /* SYSFS */ |
| 494 | |
| 495 | static struct i2c_driver rs5c372_driver; |
| 496 | |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 497 | static int rs5c_oscillator_setup(struct rs5c372 *rs5c372) |
| 498 | { |
| 499 | unsigned char buf[2]; |
| 500 | int addr, i, ret = 0; |
| 501 | |
Paul Mundt | 37fc5e2 | 2008-10-15 22:03:03 -0700 | [diff] [blame] | 502 | if (rs5c372->type == rtc_r2025sd) { |
Thomas Koeller | a9dbe55 | 2010-06-02 15:53:05 +0200 | [diff] [blame] | 503 | if (rs5c372->regs[RS5C_REG_CTRL2] & R2025_CTRL2_XST) |
Paul Mundt | 37fc5e2 | 2008-10-15 22:03:03 -0700 | [diff] [blame] | 504 | return ret; |
Thomas Koeller | a9dbe55 | 2010-06-02 15:53:05 +0200 | [diff] [blame] | 505 | rs5c372->regs[RS5C_REG_CTRL2] |= R2025_CTRL2_XST; |
Paul Mundt | 37fc5e2 | 2008-10-15 22:03:03 -0700 | [diff] [blame] | 506 | } else { |
| 507 | if (!(rs5c372->regs[RS5C_REG_CTRL2] & RS5C_CTRL2_XSTP)) |
| 508 | return ret; |
| 509 | rs5c372->regs[RS5C_REG_CTRL2] &= ~RS5C_CTRL2_XSTP; |
| 510 | } |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 511 | |
| 512 | addr = RS5C_ADDR(RS5C_REG_CTRL1); |
| 513 | buf[0] = rs5c372->regs[RS5C_REG_CTRL1]; |
| 514 | buf[1] = rs5c372->regs[RS5C_REG_CTRL2]; |
| 515 | |
| 516 | /* use 24hr mode */ |
| 517 | switch (rs5c372->type) { |
| 518 | case rtc_rs5c372a: |
| 519 | case rtc_rs5c372b: |
| 520 | buf[1] |= RS5C372_CTRL2_24; |
| 521 | rs5c372->time24 = 1; |
| 522 | break; |
Paul Mundt | 37fc5e2 | 2008-10-15 22:03:03 -0700 | [diff] [blame] | 523 | case rtc_r2025sd: |
Lucas Stach | 550fcb8 | 2013-05-07 16:18:11 -0700 | [diff] [blame] | 524 | case rtc_r2221tl: |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 525 | case rtc_rv5c386: |
| 526 | case rtc_rv5c387a: |
| 527 | buf[0] |= RV5C387_CTRL1_24; |
| 528 | rs5c372->time24 = 1; |
| 529 | break; |
| 530 | default: |
| 531 | /* impossible */ |
| 532 | break; |
| 533 | } |
| 534 | |
| 535 | for (i = 0; i < sizeof(buf); i++) { |
| 536 | addr = RS5C_ADDR(RS5C_REG_CTRL1 + i); |
| 537 | ret = i2c_smbus_write_byte_data(rs5c372->client, addr, buf[i]); |
| 538 | if (unlikely(ret < 0)) |
| 539 | return ret; |
| 540 | } |
| 541 | |
| 542 | rs5c372->regs[RS5C_REG_CTRL1] = buf[0]; |
| 543 | rs5c372->regs[RS5C_REG_CTRL2] = buf[1]; |
| 544 | |
| 545 | return 0; |
| 546 | } |
| 547 | |
Jean Delvare | d2653e9 | 2008-04-29 23:11:39 +0200 | [diff] [blame] | 548 | static int rs5c372_probe(struct i2c_client *client, |
| 549 | const struct i2c_device_id *id) |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 550 | { |
| 551 | int err = 0; |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 552 | int smbus_mode = 0; |
Riku Voipio | c6f24f9 | 2006-12-06 20:39:13 -0800 | [diff] [blame] | 553 | struct rs5c372 *rs5c372; |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 554 | struct rtc_time tm; |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 555 | |
Harvey Harrison | 2a4e2b8 | 2008-04-28 02:12:00 -0700 | [diff] [blame] | 556 | dev_dbg(&client->dev, "%s\n", __func__); |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 557 | |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 558 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C | |
| 559 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_I2C_BLOCK)) { |
| 560 | /* |
| 561 | * If we don't have any master mode adapter, try breaking |
| 562 | * it down in to the barest of capabilities. |
| 563 | */ |
| 564 | if (i2c_check_functionality(client->adapter, |
| 565 | I2C_FUNC_SMBUS_BYTE_DATA | |
| 566 | I2C_FUNC_SMBUS_I2C_BLOCK)) |
| 567 | smbus_mode = 1; |
| 568 | else { |
| 569 | /* Still no good, give up */ |
| 570 | err = -ENODEV; |
| 571 | goto exit; |
| 572 | } |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 573 | } |
| 574 | |
Jingoo Han | b8a4b4e | 2013-04-29 16:20:52 -0700 | [diff] [blame] | 575 | rs5c372 = devm_kzalloc(&client->dev, sizeof(struct rs5c372), |
| 576 | GFP_KERNEL); |
| 577 | if (!rs5c372) { |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 578 | err = -ENOMEM; |
| 579 | goto exit; |
| 580 | } |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 581 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 582 | rs5c372->client = client; |
Riku Voipio | c6f24f9 | 2006-12-06 20:39:13 -0800 | [diff] [blame] | 583 | i2c_set_clientdata(client, rs5c372); |
Jean Delvare | 3760f73 | 2008-04-29 23:11:40 +0200 | [diff] [blame] | 584 | rs5c372->type = id->driver_data; |
Riku Voipio | c6f24f9 | 2006-12-06 20:39:13 -0800 | [diff] [blame] | 585 | |
Paul Mundt | e2bfe34 | 2008-04-28 02:11:57 -0700 | [diff] [blame] | 586 | /* we read registers 0x0f then 0x00-0x0f; skip the first one */ |
| 587 | rs5c372->regs = &rs5c372->buf[1]; |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 588 | rs5c372->smbus = smbus_mode; |
Paul Mundt | e2bfe34 | 2008-04-28 02:11:57 -0700 | [diff] [blame] | 589 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 590 | err = rs5c_get_regs(rs5c372); |
| 591 | if (err < 0) |
Jingoo Han | b8a4b4e | 2013-04-29 16:20:52 -0700 | [diff] [blame] | 592 | goto exit; |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 593 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 594 | /* clock may be set for am/pm or 24 hr time */ |
| 595 | switch (rs5c372->type) { |
| 596 | case rtc_rs5c372a: |
| 597 | case rtc_rs5c372b: |
| 598 | /* alarm uses ALARM_A; and nINTRA on 372a, nINTR on 372b. |
| 599 | * so does periodic irq, except some 327a modes. |
| 600 | */ |
| 601 | if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C372_CTRL2_24) |
| 602 | rs5c372->time24 = 1; |
| 603 | break; |
Paul Mundt | 37fc5e2 | 2008-10-15 22:03:03 -0700 | [diff] [blame] | 604 | case rtc_r2025sd: |
Lucas Stach | 550fcb8 | 2013-05-07 16:18:11 -0700 | [diff] [blame] | 605 | case rtc_r2221tl: |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 606 | case rtc_rv5c386: |
| 607 | case rtc_rv5c387a: |
| 608 | if (rs5c372->regs[RS5C_REG_CTRL1] & RV5C387_CTRL1_24) |
| 609 | rs5c372->time24 = 1; |
| 610 | /* alarm uses ALARM_W; and nINTRB for alarm and periodic |
| 611 | * irq, on both 386 and 387 |
| 612 | */ |
| 613 | break; |
| 614 | default: |
| 615 | dev_err(&client->dev, "unknown RTC type\n"); |
Jingoo Han | b8a4b4e | 2013-04-29 16:20:52 -0700 | [diff] [blame] | 616 | goto exit; |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 617 | } |
| 618 | |
| 619 | /* if the oscillator lost power and no other software (like |
| 620 | * the bootloader) set it up, do it here. |
Paul Mundt | 37fc5e2 | 2008-10-15 22:03:03 -0700 | [diff] [blame] | 621 | * |
| 622 | * The R2025S/D does this a little differently than the other |
| 623 | * parts, so we special case that.. |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 624 | */ |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 625 | err = rs5c_oscillator_setup(rs5c372); |
| 626 | if (unlikely(err < 0)) { |
| 627 | dev_err(&client->dev, "setup error\n"); |
Jingoo Han | b8a4b4e | 2013-04-29 16:20:52 -0700 | [diff] [blame] | 628 | goto exit; |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | if (rs5c372_get_datetime(client, &tm) < 0) |
| 632 | dev_warn(&client->dev, "clock needs to be set\n"); |
| 633 | |
Alexandre Belloni | fa56911 | 2016-03-31 15:07:26 +0200 | [diff] [blame] | 634 | dev_info(&client->dev, "%s found, %s\n", |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 635 | ({ char *s; switch (rs5c372->type) { |
Paul Mundt | 37fc5e2 | 2008-10-15 22:03:03 -0700 | [diff] [blame] | 636 | case rtc_r2025sd: s = "r2025sd"; break; |
Lucas Stach | 550fcb8 | 2013-05-07 16:18:11 -0700 | [diff] [blame] | 637 | case rtc_r2221tl: s = "r2221tl"; break; |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 638 | case rtc_rs5c372a: s = "rs5c372a"; break; |
| 639 | case rtc_rs5c372b: s = "rs5c372b"; break; |
| 640 | case rtc_rv5c386: s = "rv5c386"; break; |
| 641 | case rtc_rv5c387a: s = "rv5c387a"; break; |
| 642 | default: s = "chip"; break; |
| 643 | }; s;}), |
| 644 | rs5c372->time24 ? "24hr" : "am/pm" |
| 645 | ); |
| 646 | |
David Brownell | d815461 | 2007-07-17 04:04:55 -0700 | [diff] [blame] | 647 | /* REVISIT use client->irq to register alarm irq ... */ |
Jingoo Han | b8a4b4e | 2013-04-29 16:20:52 -0700 | [diff] [blame] | 648 | rs5c372->rtc = devm_rtc_device_register(&client->dev, |
| 649 | rs5c372_driver.driver.name, |
| 650 | &rs5c372_rtc_ops, THIS_MODULE); |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 651 | |
Riku Voipio | c6f24f9 | 2006-12-06 20:39:13 -0800 | [diff] [blame] | 652 | if (IS_ERR(rs5c372->rtc)) { |
| 653 | err = PTR_ERR(rs5c372->rtc); |
Jingoo Han | b8a4b4e | 2013-04-29 16:20:52 -0700 | [diff] [blame] | 654 | goto exit; |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 655 | } |
| 656 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 657 | err = rs5c_sysfs_register(&client->dev); |
Riku Voipio | c6f24f9 | 2006-12-06 20:39:13 -0800 | [diff] [blame] | 658 | if (err) |
Jingoo Han | b8a4b4e | 2013-04-29 16:20:52 -0700 | [diff] [blame] | 659 | goto exit; |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 660 | |
| 661 | return 0; |
| 662 | |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 663 | exit: |
| 664 | return err; |
| 665 | } |
| 666 | |
David Brownell | d815461 | 2007-07-17 04:04:55 -0700 | [diff] [blame] | 667 | static int rs5c372_remove(struct i2c_client *client) |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 668 | { |
David Brownell | d815461 | 2007-07-17 04:04:55 -0700 | [diff] [blame] | 669 | rs5c_sysfs_unregister(&client->dev); |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 670 | return 0; |
| 671 | } |
| 672 | |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 673 | static struct i2c_driver rs5c372_driver = { |
| 674 | .driver = { |
| 675 | .name = "rtc-rs5c372", |
| 676 | }, |
David Brownell | d815461 | 2007-07-17 04:04:55 -0700 | [diff] [blame] | 677 | .probe = rs5c372_probe, |
| 678 | .remove = rs5c372_remove, |
Jean Delvare | 3760f73 | 2008-04-29 23:11:40 +0200 | [diff] [blame] | 679 | .id_table = rs5c372_id, |
David Brownell | cb26b57 | 2007-01-05 16:36:37 -0800 | [diff] [blame] | 680 | }; |
| 681 | |
Axel Lin | 0abc920 | 2012-03-23 15:02:31 -0700 | [diff] [blame] | 682 | module_i2c_driver(rs5c372_driver); |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 683 | |
| 684 | MODULE_AUTHOR( |
| 685 | "Pavel Mironchik <pmironchik@optifacio.net>, " |
Paul Mundt | 0053dc0 | 2008-10-15 22:03:01 -0700 | [diff] [blame] | 686 | "Alessandro Zummo <a.zummo@towertech.it>, " |
| 687 | "Paul Mundt <lethal@linux-sh.org>"); |
Alessandro Zummo | 7520b94 | 2006-03-27 01:16:45 -0800 | [diff] [blame] | 688 | MODULE_DESCRIPTION("Ricoh RS5C372 RTC driver"); |
| 689 | MODULE_LICENSE("GPL"); |