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-rw-r--r--drivers/rtc/Kconfig19
-rw-r--r--drivers/rtc/Makefile3
-rw-r--r--drivers/rtc/rtc-ab8500.c103
-rw-r--r--drivers/rtc/rtc-max8998.c300
-rw-r--r--drivers/rtc/rtc-mc13783.c428
-rw-r--r--drivers/rtc/rtc-mc13xxx.c437
6 files changed, 807 insertions, 483 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 6a77437d4f5a..2883428d5ac8 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -196,6 +196,16 @@ config RTC_DRV_MAX8925
196 This driver can also be built as a module. If so, the module 196 This driver can also be built as a module. If so, the module
197 will be called rtc-max8925. 197 will be called rtc-max8925.
198 198
199config RTC_DRV_MAX8998
200 tristate "Maxim MAX8998"
201 depends on MFD_MAX8998
202 help
203 If you say yes here you will get support for the
204 RTC of Maxim MAX8998 PMIC.
205
206 This driver can also be built as a module. If so, the module
207 will be called rtc-max8998.
208
199config RTC_DRV_RS5C372 209config RTC_DRV_RS5C372
200 tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A" 210 tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
201 help 211 help
@@ -926,11 +936,12 @@ config RTC_DRV_PCAP
926 If you say Y here you will get support for the RTC found on 936 If you say Y here you will get support for the RTC found on
927 the PCAP2 ASIC used on some Motorola phones. 937 the PCAP2 ASIC used on some Motorola phones.
928 938
929config RTC_DRV_MC13783 939config RTC_DRV_MC13XXX
930 depends on MFD_MC13783 940 depends on MFD_MC13XXX
931 tristate "Freescale MC13783 RTC" 941 tristate "Freescale MC13xxx RTC"
932 help 942 help
933 This enables support for the Freescale MC13783 PMIC RTC 943 This enables support for the RTCs found on Freescale's PMICs
944 MC13783 and MC13892.
934 945
935config RTC_DRV_MPC5121 946config RTC_DRV_MPC5121
936 tristate "Freescale MPC5121 built-in RTC" 947 tristate "Freescale MPC5121 built-in RTC"
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 7a7cb3228a1d..4c2832df4697 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -60,8 +60,9 @@ obj-$(CONFIG_RTC_DRV_M48T86) += rtc-m48t86.o
60obj-$(CONFIG_RTC_MXC) += rtc-mxc.o 60obj-$(CONFIG_RTC_MXC) += rtc-mxc.o
61obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o 61obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o
62obj-$(CONFIG_RTC_DRV_MAX8925) += rtc-max8925.o 62obj-$(CONFIG_RTC_DRV_MAX8925) += rtc-max8925.o
63obj-$(CONFIG_RTC_DRV_MAX8998) += rtc-max8998.o
63obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o 64obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o
64obj-$(CONFIG_RTC_DRV_MC13783) += rtc-mc13783.o 65obj-$(CONFIG_RTC_DRV_MC13XXX) += rtc-mc13xxx.o
65obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o 66obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o
66obj-$(CONFIG_RTC_DRV_MPC5121) += rtc-mpc5121.o 67obj-$(CONFIG_RTC_DRV_MPC5121) += rtc-mpc5121.o
67obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o 68obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o
diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c
index 2fda03125e55..e346705aae92 100644
--- a/drivers/rtc/rtc-ab8500.c
+++ b/drivers/rtc/rtc-ab8500.c
@@ -14,26 +14,26 @@
14#include <linux/init.h> 14#include <linux/init.h>
15#include <linux/platform_device.h> 15#include <linux/platform_device.h>
16#include <linux/rtc.h> 16#include <linux/rtc.h>
17#include <linux/mfd/abx500.h>
17#include <linux/mfd/ab8500.h> 18#include <linux/mfd/ab8500.h>
18#include <linux/delay.h> 19#include <linux/delay.h>
19 20
20#define AB8500_RTC_SOFF_STAT_REG 0x0F00 21#define AB8500_RTC_SOFF_STAT_REG 0x00
21#define AB8500_RTC_CC_CONF_REG 0x0F01 22#define AB8500_RTC_CC_CONF_REG 0x01
22#define AB8500_RTC_READ_REQ_REG 0x0F02 23#define AB8500_RTC_READ_REQ_REG 0x02
23#define AB8500_RTC_WATCH_TSECMID_REG 0x0F03 24#define AB8500_RTC_WATCH_TSECMID_REG 0x03
24#define AB8500_RTC_WATCH_TSECHI_REG 0x0F04 25#define AB8500_RTC_WATCH_TSECHI_REG 0x04
25#define AB8500_RTC_WATCH_TMIN_LOW_REG 0x0F05 26#define AB8500_RTC_WATCH_TMIN_LOW_REG 0x05
26#define AB8500_RTC_WATCH_TMIN_MID_REG 0x0F06 27#define AB8500_RTC_WATCH_TMIN_MID_REG 0x06
27#define AB8500_RTC_WATCH_TMIN_HI_REG 0x0F07 28#define AB8500_RTC_WATCH_TMIN_HI_REG 0x07
28#define AB8500_RTC_ALRM_MIN_LOW_REG 0x0F08 29#define AB8500_RTC_ALRM_MIN_LOW_REG 0x08
29#define AB8500_RTC_ALRM_MIN_MID_REG 0x0F09 30#define AB8500_RTC_ALRM_MIN_MID_REG 0x09
30#define AB8500_RTC_ALRM_MIN_HI_REG 0x0F0A 31#define AB8500_RTC_ALRM_MIN_HI_REG 0x0A
31#define AB8500_RTC_STAT_REG 0x0F0B 32#define AB8500_RTC_STAT_REG 0x0B
32#define AB8500_RTC_BKUP_CHG_REG 0x0F0C 33#define AB8500_RTC_BKUP_CHG_REG 0x0C
33#define AB8500_RTC_FORCE_BKUP_REG 0x0F0D 34#define AB8500_RTC_FORCE_BKUP_REG 0x0D
34#define AB8500_RTC_CALIB_REG 0x0F0E 35#define AB8500_RTC_CALIB_REG 0x0E
35#define AB8500_RTC_SWITCH_STAT_REG 0x0F0F 36#define AB8500_RTC_SWITCH_STAT_REG 0x0F
36#define AB8500_REV_REG 0x1080
37 37
38/* RtcReadRequest bits */ 38/* RtcReadRequest bits */
39#define RTC_READ_REQUEST 0x01 39#define RTC_READ_REQUEST 0x01
@@ -46,13 +46,13 @@
46#define COUNTS_PER_SEC (0xF000 / 60) 46#define COUNTS_PER_SEC (0xF000 / 60)
47#define AB8500_RTC_EPOCH 2000 47#define AB8500_RTC_EPOCH 2000
48 48
49static const unsigned long ab8500_rtc_time_regs[] = { 49static const u8 ab8500_rtc_time_regs[] = {
50 AB8500_RTC_WATCH_TMIN_HI_REG, AB8500_RTC_WATCH_TMIN_MID_REG, 50 AB8500_RTC_WATCH_TMIN_HI_REG, AB8500_RTC_WATCH_TMIN_MID_REG,
51 AB8500_RTC_WATCH_TMIN_LOW_REG, AB8500_RTC_WATCH_TSECHI_REG, 51 AB8500_RTC_WATCH_TMIN_LOW_REG, AB8500_RTC_WATCH_TSECHI_REG,
52 AB8500_RTC_WATCH_TSECMID_REG 52 AB8500_RTC_WATCH_TSECMID_REG
53}; 53};
54 54
55static const unsigned long ab8500_rtc_alarm_regs[] = { 55static const u8 ab8500_rtc_alarm_regs[] = {
56 AB8500_RTC_ALRM_MIN_HI_REG, AB8500_RTC_ALRM_MIN_MID_REG, 56 AB8500_RTC_ALRM_MIN_HI_REG, AB8500_RTC_ALRM_MIN_MID_REG,
57 AB8500_RTC_ALRM_MIN_LOW_REG 57 AB8500_RTC_ALRM_MIN_LOW_REG
58}; 58};
@@ -76,29 +76,30 @@ static unsigned long get_elapsed_seconds(int year)
76 76
77static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm) 77static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm)
78{ 78{
79 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
80 unsigned long timeout = jiffies + HZ; 79 unsigned long timeout = jiffies + HZ;
81 int retval, i; 80 int retval, i;
82 unsigned long mins, secs; 81 unsigned long mins, secs;
83 unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)]; 82 unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)];
83 u8 value;
84 84
85 /* Request a data read */ 85 /* Request a data read */
86 retval = ab8500_write(ab8500, AB8500_RTC_READ_REQ_REG, 86 retval = abx500_set_register_interruptible(dev,
87 RTC_READ_REQUEST); 87 AB8500_RTC, AB8500_RTC_READ_REQ_REG, RTC_READ_REQUEST);
88 if (retval < 0) 88 if (retval < 0)
89 return retval; 89 return retval;
90 90
91 /* Early AB8500 chips will not clear the rtc read request bit */ 91 /* Early AB8500 chips will not clear the rtc read request bit */
92 if (ab8500->revision == 0) { 92 if (abx500_get_chip_id(dev) == 0) {
93 msleep(1); 93 msleep(1);
94 } else { 94 } else {
95 /* Wait for some cycles after enabling the rtc read in ab8500 */ 95 /* Wait for some cycles after enabling the rtc read in ab8500 */
96 while (time_before(jiffies, timeout)) { 96 while (time_before(jiffies, timeout)) {
97 retval = ab8500_read(ab8500, AB8500_RTC_READ_REQ_REG); 97 retval = abx500_get_register_interruptible(dev,
98 AB8500_RTC, AB8500_RTC_READ_REQ_REG, &value);
98 if (retval < 0) 99 if (retval < 0)
99 return retval; 100 return retval;
100 101
101 if (!(retval & RTC_READ_REQUEST)) 102 if (!(value & RTC_READ_REQUEST))
102 break; 103 break;
103 104
104 msleep(1); 105 msleep(1);
@@ -107,10 +108,11 @@ static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm)
107 108
108 /* Read the Watchtime registers */ 109 /* Read the Watchtime registers */
109 for (i = 0; i < ARRAY_SIZE(ab8500_rtc_time_regs); i++) { 110 for (i = 0; i < ARRAY_SIZE(ab8500_rtc_time_regs); i++) {
110 retval = ab8500_read(ab8500, ab8500_rtc_time_regs[i]); 111 retval = abx500_get_register_interruptible(dev,
112 AB8500_RTC, ab8500_rtc_time_regs[i], &value);
111 if (retval < 0) 113 if (retval < 0)
112 return retval; 114 return retval;
113 buf[i] = retval; 115 buf[i] = value;
114 } 116 }
115 117
116 mins = (buf[0] << 16) | (buf[1] << 8) | buf[2]; 118 mins = (buf[0] << 16) | (buf[1] << 8) | buf[2];
@@ -128,7 +130,6 @@ static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm)
128 130
129static int ab8500_rtc_set_time(struct device *dev, struct rtc_time *tm) 131static int ab8500_rtc_set_time(struct device *dev, struct rtc_time *tm)
130{ 132{
131 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
132 int retval, i; 133 int retval, i;
133 unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)]; 134 unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)];
134 unsigned long no_secs, no_mins, secs = 0; 135 unsigned long no_secs, no_mins, secs = 0;
@@ -162,27 +163,29 @@ static int ab8500_rtc_set_time(struct device *dev, struct rtc_time *tm)
162 buf[0] = (no_mins >> 16) & 0xFF; 163 buf[0] = (no_mins >> 16) & 0xFF;
163 164
164 for (i = 0; i < ARRAY_SIZE(ab8500_rtc_time_regs); i++) { 165 for (i = 0; i < ARRAY_SIZE(ab8500_rtc_time_regs); i++) {
165 retval = ab8500_write(ab8500, ab8500_rtc_time_regs[i], buf[i]); 166 retval = abx500_set_register_interruptible(dev, AB8500_RTC,
167 ab8500_rtc_time_regs[i], buf[i]);
166 if (retval < 0) 168 if (retval < 0)
167 return retval; 169 return retval;
168 } 170 }
169 171
170 /* Request a data write */ 172 /* Request a data write */
171 return ab8500_write(ab8500, AB8500_RTC_READ_REQ_REG, RTC_WRITE_REQUEST); 173 return abx500_set_register_interruptible(dev, AB8500_RTC,
174 AB8500_RTC_READ_REQ_REG, RTC_WRITE_REQUEST);
172} 175}
173 176
174static int ab8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) 177static int ab8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
175{ 178{
176 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
177 int retval, i; 179 int retval, i;
178 int rtc_ctrl; 180 u8 rtc_ctrl, value;
179 unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)]; 181 unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)];
180 unsigned long secs, mins; 182 unsigned long secs, mins;
181 183
182 /* Check if the alarm is enabled or not */ 184 /* Check if the alarm is enabled or not */
183 rtc_ctrl = ab8500_read(ab8500, AB8500_RTC_STAT_REG); 185 retval = abx500_get_register_interruptible(dev, AB8500_RTC,
184 if (rtc_ctrl < 0) 186 AB8500_RTC_STAT_REG, &rtc_ctrl);
185 return rtc_ctrl; 187 if (retval < 0)
188 return retval;
186 189
187 if (rtc_ctrl & RTC_ALARM_ENA) 190 if (rtc_ctrl & RTC_ALARM_ENA)
188 alarm->enabled = 1; 191 alarm->enabled = 1;
@@ -192,10 +195,11 @@ static int ab8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
192 alarm->pending = 0; 195 alarm->pending = 0;
193 196
194 for (i = 0; i < ARRAY_SIZE(ab8500_rtc_alarm_regs); i++) { 197 for (i = 0; i < ARRAY_SIZE(ab8500_rtc_alarm_regs); i++) {
195 retval = ab8500_read(ab8500, ab8500_rtc_alarm_regs[i]); 198 retval = abx500_get_register_interruptible(dev, AB8500_RTC,
199 ab8500_rtc_alarm_regs[i], &value);
196 if (retval < 0) 200 if (retval < 0)
197 return retval; 201 return retval;
198 buf[i] = retval; 202 buf[i] = value;
199 } 203 }
200 204
201 mins = (buf[0] << 16) | (buf[1] << 8) | (buf[2]); 205 mins = (buf[0] << 16) | (buf[1] << 8) | (buf[2]);
@@ -211,15 +215,13 @@ static int ab8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
211 215
212static int ab8500_rtc_irq_enable(struct device *dev, unsigned int enabled) 216static int ab8500_rtc_irq_enable(struct device *dev, unsigned int enabled)
213{ 217{
214 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent); 218 return abx500_mask_and_set_register_interruptible(dev, AB8500_RTC,
215 219 AB8500_RTC_STAT_REG, RTC_ALARM_ENA,
216 return ab8500_set_bits(ab8500, AB8500_RTC_STAT_REG, RTC_ALARM_ENA, 220 enabled ? RTC_ALARM_ENA : 0);
217 enabled ? RTC_ALARM_ENA : 0);
218} 221}
219 222
220static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) 223static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
221{ 224{
222 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
223 int retval, i; 225 int retval, i;
224 unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)]; 226 unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)];
225 unsigned long mins, secs = 0; 227 unsigned long mins, secs = 0;
@@ -247,7 +249,8 @@ static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
247 249
248 /* Set the alarm time */ 250 /* Set the alarm time */
249 for (i = 0; i < ARRAY_SIZE(ab8500_rtc_alarm_regs); i++) { 251 for (i = 0; i < ARRAY_SIZE(ab8500_rtc_alarm_regs); i++) {
250 retval = ab8500_write(ab8500, ab8500_rtc_alarm_regs[i], buf[i]); 252 retval = abx500_set_register_interruptible(dev, AB8500_RTC,
253 ab8500_rtc_alarm_regs[i], buf[i]);
251 if (retval < 0) 254 if (retval < 0)
252 return retval; 255 return retval;
253 } 256 }
@@ -276,10 +279,9 @@ static const struct rtc_class_ops ab8500_rtc_ops = {
276 279
277static int __devinit ab8500_rtc_probe(struct platform_device *pdev) 280static int __devinit ab8500_rtc_probe(struct platform_device *pdev)
278{ 281{
279 struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
280 int err; 282 int err;
281 struct rtc_device *rtc; 283 struct rtc_device *rtc;
282 int rtc_ctrl; 284 u8 rtc_ctrl;
283 int irq; 285 int irq;
284 286
285 irq = platform_get_irq_byname(pdev, "ALARM"); 287 irq = platform_get_irq_byname(pdev, "ALARM");
@@ -287,17 +289,18 @@ static int __devinit ab8500_rtc_probe(struct platform_device *pdev)
287 return irq; 289 return irq;
288 290
289 /* For RTC supply test */ 291 /* For RTC supply test */
290 err = ab8500_set_bits(ab8500, AB8500_RTC_STAT_REG, RTC_STATUS_DATA, 292 err = abx500_mask_and_set_register_interruptible(&pdev->dev, AB8500_RTC,
291 RTC_STATUS_DATA); 293 AB8500_RTC_STAT_REG, RTC_STATUS_DATA, RTC_STATUS_DATA);
292 if (err < 0) 294 if (err < 0)
293 return err; 295 return err;
294 296
295 /* Wait for reset by the PorRtc */ 297 /* Wait for reset by the PorRtc */
296 msleep(1); 298 msleep(1);
297 299
298 rtc_ctrl = ab8500_read(ab8500, AB8500_RTC_STAT_REG); 300 err = abx500_get_register_interruptible(&pdev->dev, AB8500_RTC,
299 if (rtc_ctrl < 0) 301 AB8500_RTC_STAT_REG, &rtc_ctrl);
300 return rtc_ctrl; 302 if (err < 0)
303 return err;
301 304
302 /* Check if the RTC Supply fails */ 305 /* Check if the RTC Supply fails */
303 if (!(rtc_ctrl & RTC_STATUS_DATA)) { 306 if (!(rtc_ctrl & RTC_STATUS_DATA)) {
diff --git a/drivers/rtc/rtc-max8998.c b/drivers/rtc/rtc-max8998.c
new file mode 100644
index 000000000000..f22dee35f330
--- /dev/null
+++ b/drivers/rtc/rtc-max8998.c
@@ -0,0 +1,300 @@
1/*
2 * RTC driver for Maxim MAX8998
3 *
4 * Copyright (C) 2010 Samsung Electronics Co.Ltd
5 * Author: Minkyu Kang <mk7.kang@samsung.com>
6 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
15#include <linux/module.h>
16#include <linux/i2c.h>
17#include <linux/slab.h>
18#include <linux/bcd.h>
19#include <linux/rtc.h>
20#include <linux/platform_device.h>
21#include <linux/mfd/max8998.h>
22#include <linux/mfd/max8998-private.h>
23
24#define MAX8998_RTC_SEC 0x00
25#define MAX8998_RTC_MIN 0x01
26#define MAX8998_RTC_HOUR 0x02
27#define MAX8998_RTC_WEEKDAY 0x03
28#define MAX8998_RTC_DATE 0x04
29#define MAX8998_RTC_MONTH 0x05
30#define MAX8998_RTC_YEAR1 0x06
31#define MAX8998_RTC_YEAR2 0x07
32#define MAX8998_ALARM0_SEC 0x08
33#define MAX8998_ALARM0_MIN 0x09
34#define MAX8998_ALARM0_HOUR 0x0a
35#define MAX8998_ALARM0_WEEKDAY 0x0b
36#define MAX8998_ALARM0_DATE 0x0c
37#define MAX8998_ALARM0_MONTH 0x0d
38#define MAX8998_ALARM0_YEAR1 0x0e
39#define MAX8998_ALARM0_YEAR2 0x0f
40#define MAX8998_ALARM1_SEC 0x10
41#define MAX8998_ALARM1_MIN 0x11
42#define MAX8998_ALARM1_HOUR 0x12
43#define MAX8998_ALARM1_WEEKDAY 0x13
44#define MAX8998_ALARM1_DATE 0x14
45#define MAX8998_ALARM1_MONTH 0x15
46#define MAX8998_ALARM1_YEAR1 0x16
47#define MAX8998_ALARM1_YEAR2 0x17
48#define MAX8998_ALARM0_CONF 0x18
49#define MAX8998_ALARM1_CONF 0x19
50#define MAX8998_RTC_STATUS 0x1a
51#define MAX8998_WTSR_SMPL_CNTL 0x1b
52#define MAX8998_TEST 0x1f
53
54#define HOUR_12 (1 << 7)
55#define HOUR_PM (1 << 5)
56#define ALARM0_STATUS (1 << 1)
57#define ALARM1_STATUS (1 << 2)
58
59enum {
60 RTC_SEC = 0,
61 RTC_MIN,
62 RTC_HOUR,
63 RTC_WEEKDAY,
64 RTC_DATE,
65 RTC_MONTH,
66 RTC_YEAR1,
67 RTC_YEAR2,
68};
69
70struct max8998_rtc_info {
71 struct device *dev;
72 struct max8998_dev *max8998;
73 struct i2c_client *rtc;
74 struct rtc_device *rtc_dev;
75 int irq;
76};
77
78static void max8998_data_to_tm(u8 *data, struct rtc_time *tm)
79{
80 tm->tm_sec = bcd2bin(data[RTC_SEC]);
81 tm->tm_min = bcd2bin(data[RTC_MIN]);
82 if (data[RTC_HOUR] & HOUR_12) {
83 tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x1f);
84 if (data[RTC_HOUR] & HOUR_PM)
85 tm->tm_hour += 12;
86 } else
87 tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x3f);
88
89 tm->tm_wday = data[RTC_WEEKDAY] & 0x07;
90 tm->tm_mday = bcd2bin(data[RTC_DATE]);
91 tm->tm_mon = bcd2bin(data[RTC_MONTH]);
92 tm->tm_year = bcd2bin(data[RTC_YEAR1]) + bcd2bin(data[RTC_YEAR2]) * 100;
93 tm->tm_year -= 1900;
94}
95
96static void max8998_tm_to_data(struct rtc_time *tm, u8 *data)
97{
98 data[RTC_SEC] = bin2bcd(tm->tm_sec);
99 data[RTC_MIN] = bin2bcd(tm->tm_min);
100 data[RTC_HOUR] = bin2bcd(tm->tm_hour);
101 data[RTC_WEEKDAY] = tm->tm_wday;
102 data[RTC_DATE] = bin2bcd(tm->tm_mday);
103 data[RTC_MONTH] = bin2bcd(tm->tm_mon);
104 data[RTC_YEAR1] = bin2bcd(tm->tm_year % 100);
105 data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100);
106}
107
108static int max8998_rtc_read_time(struct device *dev, struct rtc_time *tm)
109{
110 struct max8998_rtc_info *info = dev_get_drvdata(dev);
111 u8 data[8];
112 int ret;
113
114 ret = max8998_bulk_read(info->rtc, MAX8998_RTC_SEC, 8, data);
115 if (ret < 0)
116 return ret;
117
118 max8998_data_to_tm(data, tm);
119
120 return rtc_valid_tm(tm);
121}
122
123static int max8998_rtc_set_time(struct device *dev, struct rtc_time *tm)
124{
125 struct max8998_rtc_info *info = dev_get_drvdata(dev);
126 u8 data[8];
127
128 max8998_tm_to_data(tm, data);
129
130 return max8998_bulk_write(info->rtc, MAX8998_RTC_SEC, 8, data);
131}
132
133static int max8998_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
134{
135 struct max8998_rtc_info *info = dev_get_drvdata(dev);
136 u8 data[8];
137 u8 val;
138 int ret;
139
140 ret = max8998_bulk_read(info->rtc, MAX8998_ALARM0_SEC, 8, data);
141 if (ret < 0)
142 return ret;
143
144 max8998_data_to_tm(data, &alrm->time);
145
146 ret = max8998_read_reg(info->rtc, MAX8998_ALARM0_CONF, &val);
147 if (ret < 0)
148 return ret;
149
150 alrm->enabled = !!val;
151
152 ret = max8998_read_reg(info->rtc, MAX8998_RTC_STATUS, &val);
153 if (ret < 0)
154 return ret;
155
156 if (val & ALARM0_STATUS)
157 alrm->pending = 1;
158 else
159 alrm->pending = 0;
160
161 return 0;
162}
163
164static int max8998_rtc_stop_alarm(struct max8998_rtc_info *info)
165{
166 return max8998_write_reg(info->rtc, MAX8998_ALARM0_CONF, 0);
167}
168
169static int max8998_rtc_start_alarm(struct max8998_rtc_info *info)
170{
171 return max8998_write_reg(info->rtc, MAX8998_ALARM0_CONF, 0x77);
172}
173
174static int max8998_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
175{
176 struct max8998_rtc_info *info = dev_get_drvdata(dev);
177 u8 data[8];
178 int ret;
179
180 max8998_tm_to_data(&alrm->time, data);
181
182 ret = max8998_rtc_stop_alarm(info);
183 if (ret < 0)
184 return ret;
185
186 ret = max8998_bulk_write(info->rtc, MAX8998_ALARM0_SEC, 8, data);
187 if (ret < 0)
188 return ret;
189
190 if (alrm->enabled)
191 return max8998_rtc_start_alarm(info);
192
193 return 0;
194}
195
196static int max8998_rtc_alarm_irq_enable(struct device *dev,
197 unsigned int enabled)
198{
199 struct max8998_rtc_info *info = dev_get_drvdata(dev);
200
201 if (enabled)
202 return max8998_rtc_start_alarm(info);
203 else
204 return max8998_rtc_stop_alarm(info);
205}
206
207static irqreturn_t max8998_rtc_alarm_irq(int irq, void *data)
208{
209 struct max8998_rtc_info *info = data;
210
211 rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
212
213 return IRQ_HANDLED;
214}
215
216static const struct rtc_class_ops max8998_rtc_ops = {
217 .read_time = max8998_rtc_read_time,
218 .set_time = max8998_rtc_set_time,
219 .read_alarm = max8998_rtc_read_alarm,
220 .set_alarm = max8998_rtc_set_alarm,
221 .alarm_irq_enable = max8998_rtc_alarm_irq_enable,
222};
223
224static int __devinit max8998_rtc_probe(struct platform_device *pdev)
225{
226 struct max8998_dev *max8998 = dev_get_drvdata(pdev->dev.parent);
227 struct max8998_rtc_info *info;
228 int ret;
229
230 info = kzalloc(sizeof(struct max8998_rtc_info), GFP_KERNEL);
231 if (!info)
232 return -ENOMEM;
233
234 info->dev = &pdev->dev;
235 info->max8998 = max8998;
236 info->rtc = max8998->rtc;
237 info->irq = max8998->irq_base + MAX8998_IRQ_ALARM0;
238
239 info->rtc_dev = rtc_device_register("max8998-rtc", &pdev->dev,
240 &max8998_rtc_ops, THIS_MODULE);
241
242 if (IS_ERR(info->rtc_dev)) {
243 ret = PTR_ERR(info->rtc_dev);
244 dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
245 goto out_rtc;
246 }
247
248 platform_set_drvdata(pdev, info);
249
250 ret = request_threaded_irq(info->irq, NULL, max8998_rtc_alarm_irq, 0,
251 "rtc-alarm0", info);
252 if (ret < 0)
253 dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
254 info->irq, ret);
255
256 return 0;
257
258out_rtc:
259 kfree(info);
260 return ret;
261}
262
263static int __devexit max8998_rtc_remove(struct platform_device *pdev)
264{
265 struct max8998_rtc_info *info = platform_get_drvdata(pdev);
266
267 if (info) {
268 free_irq(info->irq, info);
269 rtc_device_unregister(info->rtc_dev);
270 kfree(info);
271 }
272
273 return 0;
274}
275
276static struct platform_driver max8998_rtc_driver = {
277 .driver = {
278 .name = "max8998-rtc",
279 .owner = THIS_MODULE,
280 },
281 .probe = max8998_rtc_probe,
282 .remove = __devexit_p(max8998_rtc_remove),
283};
284
285static int __init max8998_rtc_init(void)
286{
287 return platform_driver_register(&max8998_rtc_driver);
288}
289module_init(max8998_rtc_init);
290
291static void __exit max8998_rtc_exit(void)
292{
293 platform_driver_unregister(&max8998_rtc_driver);
294}
295module_exit(max8998_rtc_exit);
296
297MODULE_AUTHOR("Minkyu Kang <mk7.kang@samsung.com>");
298MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
299MODULE_DESCRIPTION("Maxim MAX8998 RTC driver");
300MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-mc13783.c b/drivers/rtc/rtc-mc13783.c
deleted file mode 100644
index 675bfb515367..000000000000
--- a/drivers/rtc/rtc-mc13783.c
+++ /dev/null
@@ -1,428 +0,0 @@
1/*
2 * Real Time Clock driver for Freescale MC13783 PMIC
3 *
4 * (C) 2009 Sascha Hauer, Pengutronix
5 * (C) 2009 Uwe Kleine-Koenig, Pengutronix
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
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/mfd/mc13783.h>
13#include <linux/platform_device.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/slab.h>
17#include <linux/rtc.h>
18
19#define DRIVER_NAME "mc13783-rtc"
20
21#define MC13783_RTCTOD 20
22#define MC13783_RTCTODA 21
23#define MC13783_RTCDAY 22
24#define MC13783_RTCDAYA 23
25
26struct mc13783_rtc {
27 struct rtc_device *rtc;
28 struct mc13783 *mc13783;
29 int valid;
30};
31
32static int mc13783_rtc_irq_enable_unlocked(struct device *dev,
33 unsigned int enabled, int irq)
34{
35 struct mc13783_rtc *priv = dev_get_drvdata(dev);
36 int (*func)(struct mc13783 *mc13783, int irq);
37
38 if (!priv->valid)
39 return -ENODATA;
40
41 func = enabled ? mc13783_irq_unmask : mc13783_irq_mask;
42 return func(priv->mc13783, irq);
43}
44
45static int mc13783_rtc_irq_enable(struct device *dev,
46 unsigned int enabled, int irq)
47{
48 struct mc13783_rtc *priv = dev_get_drvdata(dev);
49 int ret;
50
51 mc13783_lock(priv->mc13783);
52
53 ret = mc13783_rtc_irq_enable_unlocked(dev, enabled, irq);
54
55 mc13783_unlock(priv->mc13783);
56
57 return ret;
58}
59
60static int mc13783_rtc_read_time(struct device *dev, struct rtc_time *tm)
61{
62 struct mc13783_rtc *priv = dev_get_drvdata(dev);
63 unsigned int seconds, days1, days2;
64 unsigned long s1970;
65 int ret;
66
67 mc13783_lock(priv->mc13783);
68
69 if (!priv->valid) {
70 ret = -ENODATA;
71 goto out;
72 }
73
74 ret = mc13783_reg_read(priv->mc13783, MC13783_RTCDAY, &days1);
75 if (unlikely(ret))
76 goto out;
77
78 ret = mc13783_reg_read(priv->mc13783, MC13783_RTCTOD, &seconds);
79 if (unlikely(ret))
80 goto out;
81
82 ret = mc13783_reg_read(priv->mc13783, MC13783_RTCDAY, &days2);
83out:
84 mc13783_unlock(priv->mc13783);
85
86 if (ret)
87 return ret;
88
89 if (days2 == days1 + 1) {
90 if (seconds >= 86400 / 2)
91 days2 = days1;
92 else
93 days1 = days2;
94 }
95
96 if (days1 != days2)
97 return -EIO;
98
99 s1970 = days1 * 86400 + seconds;
100
101 rtc_time_to_tm(s1970, tm);
102
103 return rtc_valid_tm(tm);
104}
105
106static int mc13783_rtc_set_mmss(struct device *dev, unsigned long secs)
107{
108 struct mc13783_rtc *priv = dev_get_drvdata(dev);
109 unsigned int seconds, days;
110 unsigned int alarmseconds;
111 int ret;
112
113 seconds = secs % 86400;
114 days = secs / 86400;
115
116 mc13783_lock(priv->mc13783);
117
118 /*
119 * temporarily invalidate alarm to prevent triggering it when the day is
120 * already updated while the time isn't yet.
121 */
122 ret = mc13783_reg_read(priv->mc13783, MC13783_RTCTODA, &alarmseconds);
123 if (unlikely(ret))
124 goto out;
125
126 if (alarmseconds < 86400) {
127 ret = mc13783_reg_write(priv->mc13783,
128 MC13783_RTCTODA, 0x1ffff);
129 if (unlikely(ret))
130 goto out;
131 }
132
133 /*
134 * write seconds=0 to prevent a day switch between writing days
135 * and seconds below
136 */
137 ret = mc13783_reg_write(priv->mc13783, MC13783_RTCTOD, 0);
138 if (unlikely(ret))
139 goto out;
140
141 ret = mc13783_reg_write(priv->mc13783, MC13783_RTCDAY, days);
142 if (unlikely(ret))
143 goto out;
144
145 ret = mc13783_reg_write(priv->mc13783, MC13783_RTCTOD, seconds);
146 if (unlikely(ret))
147 goto out;
148
149 /* restore alarm */
150 if (alarmseconds < 86400) {
151 ret = mc13783_reg_write(priv->mc13783,
152 MC13783_RTCTODA, alarmseconds);
153 if (unlikely(ret))
154 goto out;
155 }
156
157 ret = mc13783_irq_ack(priv->mc13783, MC13783_IRQ_RTCRST);
158 if (unlikely(ret))
159 goto out;
160
161 ret = mc13783_irq_unmask(priv->mc13783, MC13783_IRQ_RTCRST);
162out:
163 priv->valid = !ret;
164
165 mc13783_unlock(priv->mc13783);
166
167 return ret;
168}
169
170static int mc13783_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
171{
172 struct mc13783_rtc *priv = dev_get_drvdata(dev);
173 unsigned seconds, days;
174 unsigned long s1970;
175 int enabled, pending;
176 int ret;
177
178 mc13783_lock(priv->mc13783);
179
180 ret = mc13783_reg_read(priv->mc13783, MC13783_RTCTODA, &seconds);
181 if (unlikely(ret))
182 goto out;
183 if (seconds >= 86400) {
184 ret = -ENODATA;
185 goto out;
186 }
187
188 ret = mc13783_reg_read(priv->mc13783, MC13783_RTCDAY, &days);
189 if (unlikely(ret))
190 goto out;
191
192 ret = mc13783_irq_status(priv->mc13783, MC13783_IRQ_TODA,
193 &enabled, &pending);
194
195out:
196 mc13783_unlock(priv->mc13783);
197
198 if (ret)
199 return ret;
200
201 alarm->enabled = enabled;
202 alarm->pending = pending;
203
204 s1970 = days * 86400 + seconds;
205
206 rtc_time_to_tm(s1970, &alarm->time);
207 dev_dbg(dev, "%s: %lu\n", __func__, s1970);
208
209 return 0;
210}
211
212static int mc13783_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
213{
214 struct mc13783_rtc *priv = dev_get_drvdata(dev);
215 unsigned long s1970;
216 unsigned seconds, days;
217 int ret;
218
219 mc13783_lock(priv->mc13783);
220
221 /* disable alarm to prevent false triggering */
222 ret = mc13783_reg_write(priv->mc13783, MC13783_RTCTODA, 0x1ffff);
223 if (unlikely(ret))
224 goto out;
225
226 ret = mc13783_irq_ack(priv->mc13783, MC13783_IRQ_TODA);
227 if (unlikely(ret))
228 goto out;
229
230 ret = rtc_tm_to_time(&alarm->time, &s1970);
231 if (unlikely(ret))
232 goto out;
233
234 dev_dbg(dev, "%s: o%2.s %lu\n", __func__, alarm->enabled ? "n" : "ff",
235 s1970);
236
237 ret = mc13783_rtc_irq_enable_unlocked(dev, alarm->enabled,
238 MC13783_IRQ_TODA);
239 if (unlikely(ret))
240 goto out;
241
242 seconds = s1970 % 86400;
243 days = s1970 / 86400;
244
245 ret = mc13783_reg_write(priv->mc13783, MC13783_RTCDAYA, days);
246 if (unlikely(ret))
247 goto out;
248
249 ret = mc13783_reg_write(priv->mc13783, MC13783_RTCTODA, seconds);
250
251out:
252 mc13783_unlock(priv->mc13783);
253
254 return ret;
255}
256
257static irqreturn_t mc13783_rtc_alarm_handler(int irq, void *dev)
258{
259 struct mc13783_rtc *priv = dev;
260 struct mc13783 *mc13783 = priv->mc13783;
261
262 dev_dbg(&priv->rtc->dev, "Alarm\n");
263
264 rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_AF);
265
266 mc13783_irq_ack(mc13783, irq);
267
268 return IRQ_HANDLED;
269}
270
271static irqreturn_t mc13783_rtc_update_handler(int irq, void *dev)
272{
273 struct mc13783_rtc *priv = dev;
274 struct mc13783 *mc13783 = priv->mc13783;
275
276 dev_dbg(&priv->rtc->dev, "1HZ\n");
277
278 rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_UF);
279
280 mc13783_irq_ack(mc13783, irq);
281
282 return IRQ_HANDLED;
283}
284
285static int mc13783_rtc_update_irq_enable(struct device *dev,
286 unsigned int enabled)
287{
288 return mc13783_rtc_irq_enable(dev, enabled, MC13783_IRQ_1HZ);
289}
290
291static int mc13783_rtc_alarm_irq_enable(struct device *dev,
292 unsigned int enabled)
293{
294 return mc13783_rtc_irq_enable(dev, enabled, MC13783_IRQ_TODA);
295}
296
297static const struct rtc_class_ops mc13783_rtc_ops = {
298 .read_time = mc13783_rtc_read_time,
299 .set_mmss = mc13783_rtc_set_mmss,
300 .read_alarm = mc13783_rtc_read_alarm,
301 .set_alarm = mc13783_rtc_set_alarm,
302 .alarm_irq_enable = mc13783_rtc_alarm_irq_enable,
303 .update_irq_enable = mc13783_rtc_update_irq_enable,
304};
305
306static irqreturn_t mc13783_rtc_reset_handler(int irq, void *dev)
307{
308 struct mc13783_rtc *priv = dev;
309 struct mc13783 *mc13783 = priv->mc13783;
310
311 dev_dbg(&priv->rtc->dev, "RTCRST\n");
312 priv->valid = 0;
313
314 mc13783_irq_mask(mc13783, irq);
315
316 return IRQ_HANDLED;
317}
318
319static int __devinit mc13783_rtc_probe(struct platform_device *pdev)
320{
321 int ret;
322 struct mc13783_rtc *priv;
323 struct mc13783 *mc13783;
324 int rtcrst_pending;
325
326 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
327 if (!priv)
328 return -ENOMEM;
329
330 mc13783 = dev_get_drvdata(pdev->dev.parent);
331 priv->mc13783 = mc13783;
332
333 platform_set_drvdata(pdev, priv);
334
335 mc13783_lock(mc13783);
336
337 ret = mc13783_irq_request(mc13783, MC13783_IRQ_RTCRST,
338 mc13783_rtc_reset_handler, DRIVER_NAME, priv);
339 if (ret)
340 goto err_reset_irq_request;
341
342 ret = mc13783_irq_status(mc13783, MC13783_IRQ_RTCRST,
343 NULL, &rtcrst_pending);
344 if (ret)
345 goto err_reset_irq_status;
346
347 priv->valid = !rtcrst_pending;
348
349 ret = mc13783_irq_request_nounmask(mc13783, MC13783_IRQ_1HZ,
350 mc13783_rtc_update_handler, DRIVER_NAME, priv);
351 if (ret)
352 goto err_update_irq_request;
353
354 ret = mc13783_irq_request_nounmask(mc13783, MC13783_IRQ_TODA,
355 mc13783_rtc_alarm_handler, DRIVER_NAME, priv);
356 if (ret)
357 goto err_alarm_irq_request;
358
359 priv->rtc = rtc_device_register(pdev->name,
360 &pdev->dev, &mc13783_rtc_ops, THIS_MODULE);
361 if (IS_ERR(priv->rtc)) {
362 ret = PTR_ERR(priv->rtc);
363
364 mc13783_irq_free(mc13783, MC13783_IRQ_TODA, priv);
365err_alarm_irq_request:
366
367 mc13783_irq_free(mc13783, MC13783_IRQ_1HZ, priv);
368err_update_irq_request:
369
370err_reset_irq_status:
371
372 mc13783_irq_free(mc13783, MC13783_IRQ_RTCRST, priv);
373err_reset_irq_request:
374
375 platform_set_drvdata(pdev, NULL);
376 kfree(priv);
377 }
378
379 mc13783_unlock(mc13783);
380
381 return ret;
382}
383
384static int __devexit mc13783_rtc_remove(struct platform_device *pdev)
385{
386 struct mc13783_rtc *priv = platform_get_drvdata(pdev);
387
388 mc13783_lock(priv->mc13783);
389
390 rtc_device_unregister(priv->rtc);
391
392 mc13783_irq_free(priv->mc13783, MC13783_IRQ_TODA, priv);
393 mc13783_irq_free(priv->mc13783, MC13783_IRQ_1HZ, priv);
394 mc13783_irq_free(priv->mc13783, MC13783_IRQ_RTCRST, priv);
395
396 mc13783_unlock(priv->mc13783);
397
398 platform_set_drvdata(pdev, NULL);
399
400 kfree(priv);
401
402 return 0;
403}
404
405static struct platform_driver mc13783_rtc_driver = {
406 .remove = __devexit_p(mc13783_rtc_remove),
407 .driver = {
408 .name = DRIVER_NAME,
409 .owner = THIS_MODULE,
410 },
411};
412
413static int __init mc13783_rtc_init(void)
414{
415 return platform_driver_probe(&mc13783_rtc_driver, &mc13783_rtc_probe);
416}
417module_init(mc13783_rtc_init);
418
419static void __exit mc13783_rtc_exit(void)
420{
421 platform_driver_unregister(&mc13783_rtc_driver);
422}
423module_exit(mc13783_rtc_exit);
424
425MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
426MODULE_DESCRIPTION("RTC driver for Freescale MC13783 PMIC");
427MODULE_LICENSE("GPL v2");
428MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/rtc/rtc-mc13xxx.c b/drivers/rtc/rtc-mc13xxx.c
new file mode 100644
index 000000000000..5314b153bfba
--- /dev/null
+++ b/drivers/rtc/rtc-mc13xxx.c
@@ -0,0 +1,437 @@
1/*
2 * Real Time Clock driver for Freescale MC13XXX PMIC
3 *
4 * (C) 2009 Sascha Hauer, Pengutronix
5 * (C) 2009 Uwe Kleine-Koenig, Pengutronix
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
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/mfd/mc13xxx.h>
13#include <linux/platform_device.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/slab.h>
17#include <linux/rtc.h>
18
19#define DRIVER_NAME "mc13xxx-rtc"
20
21#define MC13XXX_RTCTOD 20
22#define MC13XXX_RTCTODA 21
23#define MC13XXX_RTCDAY 22
24#define MC13XXX_RTCDAYA 23
25
26struct mc13xxx_rtc {
27 struct rtc_device *rtc;
28 struct mc13xxx *mc13xxx;
29 int valid;
30};
31
32static int mc13xxx_rtc_irq_enable_unlocked(struct device *dev,
33 unsigned int enabled, int irq)
34{
35 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
36 int (*func)(struct mc13xxx *mc13xxx, int irq);
37
38 if (!priv->valid)
39 return -ENODATA;
40
41 func = enabled ? mc13xxx_irq_unmask : mc13xxx_irq_mask;
42 return func(priv->mc13xxx, irq);
43}
44
45static int mc13xxx_rtc_irq_enable(struct device *dev,
46 unsigned int enabled, int irq)
47{
48 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
49 int ret;
50
51 mc13xxx_lock(priv->mc13xxx);
52
53 ret = mc13xxx_rtc_irq_enable_unlocked(dev, enabled, irq);
54
55 mc13xxx_unlock(priv->mc13xxx);
56
57 return ret;
58}
59
60static int mc13xxx_rtc_read_time(struct device *dev, struct rtc_time *tm)
61{
62 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
63 unsigned int seconds, days1, days2;
64 unsigned long s1970;
65 int ret;
66
67 mc13xxx_lock(priv->mc13xxx);
68
69 if (!priv->valid) {
70 ret = -ENODATA;
71 goto out;
72 }
73
74 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days1);
75 if (unlikely(ret))
76 goto out;
77
78 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTOD, &seconds);
79 if (unlikely(ret))
80 goto out;
81
82 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days2);
83out:
84 mc13xxx_unlock(priv->mc13xxx);
85
86 if (ret)
87 return ret;
88
89 if (days2 == days1 + 1) {
90 if (seconds >= 86400 / 2)
91 days2 = days1;
92 else
93 days1 = days2;
94 }
95
96 if (days1 != days2)
97 return -EIO;
98
99 s1970 = days1 * 86400 + seconds;
100
101 rtc_time_to_tm(s1970, tm);
102
103 return rtc_valid_tm(tm);
104}
105
106static int mc13xxx_rtc_set_mmss(struct device *dev, unsigned long secs)
107{
108 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
109 unsigned int seconds, days;
110 unsigned int alarmseconds;
111 int ret;
112
113 seconds = secs % 86400;
114 days = secs / 86400;
115
116 mc13xxx_lock(priv->mc13xxx);
117
118 /*
119 * temporarily invalidate alarm to prevent triggering it when the day is
120 * already updated while the time isn't yet.
121 */
122 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &alarmseconds);
123 if (unlikely(ret))
124 goto out;
125
126 if (alarmseconds < 86400) {
127 ret = mc13xxx_reg_write(priv->mc13xxx,
128 MC13XXX_RTCTODA, 0x1ffff);
129 if (unlikely(ret))
130 goto out;
131 }
132
133 /*
134 * write seconds=0 to prevent a day switch between writing days
135 * and seconds below
136 */
137 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, 0);
138 if (unlikely(ret))
139 goto out;
140
141 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAY, days);
142 if (unlikely(ret))
143 goto out;
144
145 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, seconds);
146 if (unlikely(ret))
147 goto out;
148
149 /* restore alarm */
150 if (alarmseconds < 86400) {
151 ret = mc13xxx_reg_write(priv->mc13xxx,
152 MC13XXX_RTCTODA, alarmseconds);
153 if (unlikely(ret))
154 goto out;
155 }
156
157 ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
158 if (unlikely(ret))
159 goto out;
160
161 ret = mc13xxx_irq_unmask(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
162out:
163 priv->valid = !ret;
164
165 mc13xxx_unlock(priv->mc13xxx);
166
167 return ret;
168}
169
170static int mc13xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
171{
172 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
173 unsigned seconds, days;
174 unsigned long s1970;
175 int enabled, pending;
176 int ret;
177
178 mc13xxx_lock(priv->mc13xxx);
179
180 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &seconds);
181 if (unlikely(ret))
182 goto out;
183 if (seconds >= 86400) {
184 ret = -ENODATA;
185 goto out;
186 }
187
188 ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days);
189 if (unlikely(ret))
190 goto out;
191
192 ret = mc13xxx_irq_status(priv->mc13xxx, MC13XXX_IRQ_TODA,
193 &enabled, &pending);
194
195out:
196 mc13xxx_unlock(priv->mc13xxx);
197
198 if (ret)
199 return ret;
200
201 alarm->enabled = enabled;
202 alarm->pending = pending;
203
204 s1970 = days * 86400 + seconds;
205
206 rtc_time_to_tm(s1970, &alarm->time);
207 dev_dbg(dev, "%s: %lu\n", __func__, s1970);
208
209 return 0;
210}
211
212static int mc13xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
213{
214 struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
215 unsigned long s1970;
216 unsigned seconds, days;
217 int ret;
218
219 mc13xxx_lock(priv->mc13xxx);
220
221 /* disable alarm to prevent false triggering */
222 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, 0x1ffff);
223 if (unlikely(ret))
224 goto out;
225
226 ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_TODA);
227 if (unlikely(ret))
228 goto out;
229
230 ret = rtc_tm_to_time(&alarm->time, &s1970);
231 if (unlikely(ret))
232 goto out;
233
234 dev_dbg(dev, "%s: o%2.s %lu\n", __func__, alarm->enabled ? "n" : "ff",
235 s1970);
236
237 ret = mc13xxx_rtc_irq_enable_unlocked(dev, alarm->enabled,
238 MC13XXX_IRQ_TODA);
239 if (unlikely(ret))
240 goto out;
241
242 seconds = s1970 % 86400;
243 days = s1970 / 86400;
244
245 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAYA, days);
246 if (unlikely(ret))
247 goto out;
248
249 ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, seconds);
250
251out:
252 mc13xxx_unlock(priv->mc13xxx);
253
254 return ret;
255}
256
257static irqreturn_t mc13xxx_rtc_alarm_handler(int irq, void *dev)
258{
259 struct mc13xxx_rtc *priv = dev;
260 struct mc13xxx *mc13xxx = priv->mc13xxx;
261
262 dev_dbg(&priv->rtc->dev, "Alarm\n");
263
264 rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_AF);
265
266 mc13xxx_irq_ack(mc13xxx, irq);
267
268 return IRQ_HANDLED;
269}
270
271static irqreturn_t mc13xxx_rtc_update_handler(int irq, void *dev)
272{
273 struct mc13xxx_rtc *priv = dev;
274 struct mc13xxx *mc13xxx = priv->mc13xxx;
275
276 dev_dbg(&priv->rtc->dev, "1HZ\n");
277
278 rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_UF);
279
280 mc13xxx_irq_ack(mc13xxx, irq);
281
282 return IRQ_HANDLED;
283}
284
285static int mc13xxx_rtc_update_irq_enable(struct device *dev,
286 unsigned int enabled)
287{
288 return mc13xxx_rtc_irq_enable(dev, enabled, MC13XXX_IRQ_1HZ);
289}
290
291static int mc13xxx_rtc_alarm_irq_enable(struct device *dev,
292 unsigned int enabled)
293{
294 return mc13xxx_rtc_irq_enable(dev, enabled, MC13XXX_IRQ_TODA);
295}
296
297static const struct rtc_class_ops mc13xxx_rtc_ops = {
298 .read_time = mc13xxx_rtc_read_time,
299 .set_mmss = mc13xxx_rtc_set_mmss,
300 .read_alarm = mc13xxx_rtc_read_alarm,
301 .set_alarm = mc13xxx_rtc_set_alarm,
302 .alarm_irq_enable = mc13xxx_rtc_alarm_irq_enable,
303 .update_irq_enable = mc13xxx_rtc_update_irq_enable,
304};
305
306static irqreturn_t mc13xxx_rtc_reset_handler(int irq, void *dev)
307{
308 struct mc13xxx_rtc *priv = dev;
309 struct mc13xxx *mc13xxx = priv->mc13xxx;
310
311 dev_dbg(&priv->rtc->dev, "RTCRST\n");
312 priv->valid = 0;
313
314 mc13xxx_irq_mask(mc13xxx, irq);
315
316 return IRQ_HANDLED;
317}
318
319static int __devinit mc13xxx_rtc_probe(struct platform_device *pdev)
320{
321 int ret;
322 struct mc13xxx_rtc *priv;
323 struct mc13xxx *mc13xxx;
324 int rtcrst_pending;
325
326 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
327 if (!priv)
328 return -ENOMEM;
329
330 mc13xxx = dev_get_drvdata(pdev->dev.parent);
331 priv->mc13xxx = mc13xxx;
332
333 platform_set_drvdata(pdev, priv);
334
335 mc13xxx_lock(mc13xxx);
336
337 ret = mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_RTCRST,
338 mc13xxx_rtc_reset_handler, DRIVER_NAME, priv);
339 if (ret)
340 goto err_reset_irq_request;
341
342 ret = mc13xxx_irq_status(mc13xxx, MC13XXX_IRQ_RTCRST,
343 NULL, &rtcrst_pending);
344 if (ret)
345 goto err_reset_irq_status;
346
347 priv->valid = !rtcrst_pending;
348
349 ret = mc13xxx_irq_request_nounmask(mc13xxx, MC13XXX_IRQ_1HZ,
350 mc13xxx_rtc_update_handler, DRIVER_NAME, priv);
351 if (ret)
352 goto err_update_irq_request;
353
354 ret = mc13xxx_irq_request_nounmask(mc13xxx, MC13XXX_IRQ_TODA,
355 mc13xxx_rtc_alarm_handler, DRIVER_NAME, priv);
356 if (ret)
357 goto err_alarm_irq_request;
358
359 priv->rtc = rtc_device_register(pdev->name,
360 &pdev->dev, &mc13xxx_rtc_ops, THIS_MODULE);
361 if (IS_ERR(priv->rtc)) {
362 ret = PTR_ERR(priv->rtc);
363
364 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_TODA, priv);
365err_alarm_irq_request:
366
367 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_1HZ, priv);
368err_update_irq_request:
369
370err_reset_irq_status:
371
372 mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_RTCRST, priv);
373err_reset_irq_request:
374
375 platform_set_drvdata(pdev, NULL);
376 kfree(priv);
377 }
378
379 mc13xxx_unlock(mc13xxx);
380
381 return ret;
382}
383
384static int __devexit mc13xxx_rtc_remove(struct platform_device *pdev)
385{
386 struct mc13xxx_rtc *priv = platform_get_drvdata(pdev);
387
388 mc13xxx_lock(priv->mc13xxx);
389
390 rtc_device_unregister(priv->rtc);
391
392 mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TODA, priv);
393 mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_1HZ, priv);
394 mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_RTCRST, priv);
395
396 mc13xxx_unlock(priv->mc13xxx);
397
398 platform_set_drvdata(pdev, NULL);
399
400 kfree(priv);
401
402 return 0;
403}
404
405const struct platform_device_id mc13xxx_rtc_idtable[] = {
406 {
407 .name = "mc13783-rtc",
408 }, {
409 .name = "mc13892-rtc",
410 },
411};
412
413static struct platform_driver mc13xxx_rtc_driver = {
414 .id_table = mc13xxx_rtc_idtable,
415 .remove = __devexit_p(mc13xxx_rtc_remove),
416 .driver = {
417 .name = DRIVER_NAME,
418 .owner = THIS_MODULE,
419 },
420};
421
422static int __init mc13xxx_rtc_init(void)
423{
424 return platform_driver_probe(&mc13xxx_rtc_driver, &mc13xxx_rtc_probe);
425}
426module_init(mc13xxx_rtc_init);
427
428static void __exit mc13xxx_rtc_exit(void)
429{
430 platform_driver_unregister(&mc13xxx_rtc_driver);
431}
432module_exit(mc13xxx_rtc_exit);
433
434MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
435MODULE_DESCRIPTION("RTC driver for Freescale MC13XXX PMIC");
436MODULE_LICENSE("GPL v2");
437MODULE_ALIAS("platform:" DRIVER_NAME);
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-10 07:25:08 -0500