2 * Micro Crystal RV-3029 / RV-3049 rtc class driver
4 * Author: Gregory Hermant <gregory.hermant@calao-systems.com>
5 * Michael Buesch <m@bues.ch>
7 * based on previously existing rtc class drivers
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
15 #include <linux/module.h>
16 #include <linux/i2c.h>
17 #include <linux/spi/spi.h>
18 #include <linux/bcd.h>
19 #include <linux/rtc.h>
20 #include <linux/delay.h>
22 #include <linux/hwmon.h>
23 #include <linux/hwmon-sysfs.h>
24 #include <linux/regmap.h>
28 #define RV3029_ONOFF_CTRL 0x00
29 #define RV3029_ONOFF_CTRL_WE BIT(0)
30 #define RV3029_ONOFF_CTRL_TE BIT(1)
31 #define RV3029_ONOFF_CTRL_TAR BIT(2)
32 #define RV3029_ONOFF_CTRL_EERE BIT(3)
33 #define RV3029_ONOFF_CTRL_SRON BIT(4)
34 #define RV3029_ONOFF_CTRL_TD0 BIT(5)
35 #define RV3029_ONOFF_CTRL_TD1 BIT(6)
36 #define RV3029_ONOFF_CTRL_CLKINT BIT(7)
37 #define RV3029_IRQ_CTRL 0x01
38 #define RV3029_IRQ_CTRL_AIE BIT(0)
39 #define RV3029_IRQ_CTRL_TIE BIT(1)
40 #define RV3029_IRQ_CTRL_V1IE BIT(2)
41 #define RV3029_IRQ_CTRL_V2IE BIT(3)
42 #define RV3029_IRQ_CTRL_SRIE BIT(4)
43 #define RV3029_IRQ_FLAGS 0x02
44 #define RV3029_IRQ_FLAGS_AF BIT(0)
45 #define RV3029_IRQ_FLAGS_TF BIT(1)
46 #define RV3029_IRQ_FLAGS_V1IF BIT(2)
47 #define RV3029_IRQ_FLAGS_V2IF BIT(3)
48 #define RV3029_IRQ_FLAGS_SRF BIT(4)
49 #define RV3029_STATUS 0x03
50 #define RV3029_STATUS_VLOW1 BIT(2)
51 #define RV3029_STATUS_VLOW2 BIT(3)
52 #define RV3029_STATUS_SR BIT(4)
53 #define RV3029_STATUS_PON BIT(5)
54 #define RV3029_STATUS_EEBUSY BIT(7)
55 #define RV3029_RST_CTRL 0x04
56 #define RV3029_RST_CTRL_SYSR BIT(4)
57 #define RV3029_CONTROL_SECTION_LEN 0x05
60 #define RV3029_W_SEC 0x08
61 #define RV3029_W_MINUTES 0x09
62 #define RV3029_W_HOURS 0x0A
63 #define RV3029_REG_HR_12_24 BIT(6) /* 24h/12h mode */
64 #define RV3029_REG_HR_PM BIT(5) /* PM/AM bit in 12h mode */
65 #define RV3029_W_DATE 0x0B
66 #define RV3029_W_DAYS 0x0C
67 #define RV3029_W_MONTHS 0x0D
68 #define RV3029_W_YEARS 0x0E
69 #define RV3029_WATCH_SECTION_LEN 0x07
72 #define RV3029_A_SC 0x10
73 #define RV3029_A_MN 0x11
74 #define RV3029_A_HR 0x12
75 #define RV3029_A_DT 0x13
76 #define RV3029_A_DW 0x14
77 #define RV3029_A_MO 0x15
78 #define RV3029_A_YR 0x16
79 #define RV3029_A_AE_X BIT(7)
80 #define RV3029_ALARM_SECTION_LEN 0x07
83 #define RV3029_TIMER_LOW 0x18
84 #define RV3029_TIMER_HIGH 0x19
86 /* temperature section */
87 #define RV3029_TEMP_PAGE 0x20
89 /* eeprom data section */
90 #define RV3029_E2P_EEDATA1 0x28
91 #define RV3029_E2P_EEDATA2 0x29
92 #define RV3029_E2PDATA_SECTION_LEN 0x02
94 /* eeprom control section */
95 #define RV3029_CONTROL_E2P_EECTRL 0x30
96 #define RV3029_EECTRL_THP BIT(0) /* temp scan interval */
97 #define RV3029_EECTRL_THE BIT(1) /* thermometer enable */
98 #define RV3029_EECTRL_FD0 BIT(2) /* CLKOUT */
99 #define RV3029_EECTRL_FD1 BIT(3) /* CLKOUT */
100 #define RV3029_TRICKLE_1K BIT(4) /* 1.5K resistance */
101 #define RV3029_TRICKLE_5K BIT(5) /* 5K resistance */
102 #define RV3029_TRICKLE_20K BIT(6) /* 20K resistance */
103 #define RV3029_TRICKLE_80K BIT(7) /* 80K resistance */
104 #define RV3029_TRICKLE_MASK (RV3029_TRICKLE_1K |\
106 RV3029_TRICKLE_20K |\
108 #define RV3029_TRICKLE_SHIFT 4
109 #define RV3029_CONTROL_E2P_XOFFS 0x31 /* XTAL offset */
110 #define RV3029_CONTROL_E2P_XOFFS_SIGN BIT(7) /* Sign: 1->pos, 0->neg */
111 #define RV3029_CONTROL_E2P_QCOEF 0x32 /* XTAL temp drift coef */
112 #define RV3029_CONTROL_E2P_TURNOVER 0x33 /* XTAL turnover temp (in *C) */
113 #define RV3029_CONTROL_E2P_TOV_MASK 0x3F /* XTAL turnover temp mask */
115 /* user ram section */
116 #define RV3029_USR1_RAM_PAGE 0x38
117 #define RV3029_USR1_SECTION_LEN 0x04
118 #define RV3029_USR2_RAM_PAGE 0x3C
119 #define RV3029_USR2_SECTION_LEN 0x04
123 struct rtc_device
*rtc
;
124 struct regmap
*regmap
;
128 static int rv3029_read_regs(struct device
*dev
, u8 reg
, u8
*buf
,
131 struct rv3029_data
*rv3029
= dev_get_drvdata(dev
);
133 if ((reg
> RV3029_USR1_RAM_PAGE
+ 7) ||
134 (reg
+ len
> RV3029_USR1_RAM_PAGE
+ 8))
137 return regmap_bulk_read(rv3029
->regmap
, reg
, buf
, len
);
140 static int rv3029_write_regs(struct device
*dev
, u8 reg
, u8
const buf
[],
143 struct rv3029_data
*rv3029
= dev_get_drvdata(dev
);
145 if ((reg
> RV3029_USR1_RAM_PAGE
+ 7) ||
146 (reg
+ len
> RV3029_USR1_RAM_PAGE
+ 8))
149 return regmap_bulk_write(rv3029
->regmap
, reg
, buf
, len
);
152 static int rv3029_update_bits(struct device
*dev
, u8 reg
, u8 mask
, u8 set
)
157 ret
= rv3029_read_regs(dev
, reg
, &buf
, 1);
162 ret
= rv3029_write_regs(dev
, reg
, &buf
, 1);
169 static int rv3029_get_sr(struct device
*dev
, u8
*buf
)
171 int ret
= rv3029_read_regs(dev
, RV3029_STATUS
, buf
, 1);
175 dev_dbg(dev
, "status = 0x%.2x (%d)\n", buf
[0], buf
[0]);
179 static int rv3029_set_sr(struct device
*dev
, u8 val
)
185 sr
= rv3029_write_regs(dev
, RV3029_STATUS
, buf
, 1);
186 dev_dbg(dev
, "status = 0x%.2x (%d)\n", buf
[0], buf
[0]);
192 static int rv3029_eeprom_busywait(struct device
*dev
)
197 for (i
= 100; i
> 0; i
--) {
198 ret
= rv3029_get_sr(dev
, &sr
);
201 if (!(sr
& RV3029_STATUS_EEBUSY
))
203 usleep_range(1000, 10000);
206 dev_err(dev
, "EEPROM busy wait timeout.\n");
213 static int rv3029_eeprom_exit(struct device
*dev
)
215 /* Re-enable eeprom refresh */
216 return rv3029_update_bits(dev
, RV3029_ONOFF_CTRL
,
217 RV3029_ONOFF_CTRL_EERE
,
218 RV3029_ONOFF_CTRL_EERE
);
221 static int rv3029_eeprom_enter(struct device
*dev
)
226 /* Check whether we are in the allowed voltage range. */
227 ret
= rv3029_get_sr(dev
, &sr
);
230 if (sr
& (RV3029_STATUS_VLOW1
| RV3029_STATUS_VLOW2
)) {
231 /* We clear the bits and retry once just in case
232 * we had a brown out in early startup.
234 sr
&= ~RV3029_STATUS_VLOW1
;
235 sr
&= ~RV3029_STATUS_VLOW2
;
236 ret
= rv3029_set_sr(dev
, sr
);
239 usleep_range(1000, 10000);
240 ret
= rv3029_get_sr(dev
, &sr
);
243 if (sr
& (RV3029_STATUS_VLOW1
| RV3029_STATUS_VLOW2
)) {
245 "Supply voltage is too low to safely access the EEPROM.\n");
250 /* Disable eeprom refresh. */
251 ret
= rv3029_update_bits(dev
, RV3029_ONOFF_CTRL
, RV3029_ONOFF_CTRL_EERE
,
256 /* Wait for any previous eeprom accesses to finish. */
257 ret
= rv3029_eeprom_busywait(dev
);
259 rv3029_eeprom_exit(dev
);
264 static int rv3029_eeprom_read(struct device
*dev
, u8 reg
,
265 u8 buf
[], size_t len
)
269 err
= rv3029_eeprom_enter(dev
);
273 ret
= rv3029_read_regs(dev
, reg
, buf
, len
);
275 err
= rv3029_eeprom_exit(dev
);
282 static int rv3029_eeprom_write(struct device
*dev
, u8 reg
,
283 u8
const buf
[], size_t len
)
289 err
= rv3029_eeprom_enter(dev
);
293 for (i
= 0; i
< len
; i
++, reg
++) {
294 ret
= rv3029_read_regs(dev
, reg
, &tmp
, 1);
298 ret
= rv3029_write_regs(dev
, reg
, &buf
[i
], 1);
302 ret
= rv3029_eeprom_busywait(dev
);
307 err
= rv3029_eeprom_exit(dev
);
314 static int rv3029_eeprom_update_bits(struct device
*dev
,
315 u8 reg
, u8 mask
, u8 set
)
320 ret
= rv3029_eeprom_read(dev
, reg
, &buf
, 1);
325 ret
= rv3029_eeprom_write(dev
, reg
, &buf
, 1);
332 static int rv3029_read_time(struct device
*dev
, struct rtc_time
*tm
)
336 u8 regs
[RV3029_WATCH_SECTION_LEN
] = { 0, };
338 ret
= rv3029_get_sr(dev
, buf
);
340 dev_err(dev
, "%s: reading SR failed\n", __func__
);
344 ret
= rv3029_read_regs(dev
, RV3029_W_SEC
, regs
,
345 RV3029_WATCH_SECTION_LEN
);
347 dev_err(dev
, "%s: reading RTC section failed\n", __func__
);
351 tm
->tm_sec
= bcd2bin(regs
[RV3029_W_SEC
- RV3029_W_SEC
]);
352 tm
->tm_min
= bcd2bin(regs
[RV3029_W_MINUTES
- RV3029_W_SEC
]);
354 /* HR field has a more complex interpretation */
356 const u8 _hr
= regs
[RV3029_W_HOURS
- RV3029_W_SEC
];
358 if (_hr
& RV3029_REG_HR_12_24
) {
360 tm
->tm_hour
= bcd2bin(_hr
& 0x1f);
361 if (_hr
& RV3029_REG_HR_PM
) /* PM flag set */
363 } else /* 24h format */
364 tm
->tm_hour
= bcd2bin(_hr
& 0x3f);
367 tm
->tm_mday
= bcd2bin(regs
[RV3029_W_DATE
- RV3029_W_SEC
]);
368 tm
->tm_mon
= bcd2bin(regs
[RV3029_W_MONTHS
- RV3029_W_SEC
]) - 1;
369 tm
->tm_year
= bcd2bin(regs
[RV3029_W_YEARS
- RV3029_W_SEC
]) + 100;
370 tm
->tm_wday
= bcd2bin(regs
[RV3029_W_DAYS
- RV3029_W_SEC
]) - 1;
375 static int rv3029_read_alarm(struct device
*dev
, struct rtc_wkalrm
*alarm
)
377 struct rtc_time
*const tm
= &alarm
->time
;
381 ret
= rv3029_get_sr(dev
, regs
);
383 dev_err(dev
, "%s: reading SR failed\n", __func__
);
387 ret
= rv3029_read_regs(dev
, RV3029_A_SC
, regs
,
388 RV3029_ALARM_SECTION_LEN
);
391 dev_err(dev
, "%s: reading alarm section failed\n", __func__
);
395 tm
->tm_sec
= bcd2bin(regs
[RV3029_A_SC
- RV3029_A_SC
] & 0x7f);
396 tm
->tm_min
= bcd2bin(regs
[RV3029_A_MN
- RV3029_A_SC
] & 0x7f);
397 tm
->tm_hour
= bcd2bin(regs
[RV3029_A_HR
- RV3029_A_SC
] & 0x3f);
398 tm
->tm_mday
= bcd2bin(regs
[RV3029_A_DT
- RV3029_A_SC
] & 0x3f);
399 tm
->tm_mon
= bcd2bin(regs
[RV3029_A_MO
- RV3029_A_SC
] & 0x1f) - 1;
400 tm
->tm_year
= bcd2bin(regs
[RV3029_A_YR
- RV3029_A_SC
] & 0x7f) + 100;
401 tm
->tm_wday
= bcd2bin(regs
[RV3029_A_DW
- RV3029_A_SC
] & 0x07) - 1;
406 static int rv3029_rtc_alarm_set_irq(struct device
*dev
, int enable
)
410 /* enable/disable AIE irq */
411 ret
= rv3029_update_bits(dev
, RV3029_IRQ_CTRL
, RV3029_IRQ_CTRL_AIE
,
412 (enable
? RV3029_IRQ_CTRL_AIE
: 0));
414 dev_err(dev
, "can't update INT reg\n");
421 static int rv3029_set_alarm(struct device
*dev
, struct rtc_wkalrm
*alarm
)
423 struct rtc_time
*const tm
= &alarm
->time
;
428 * The clock has an 8 bit wide bcd-coded register (they never learn)
429 * for the year. tm_year is an offset from 1900 and we are interested
430 * in the 2000-2099 range, so any value less than 100 is invalid.
432 if (tm
->tm_year
< 100)
435 ret
= rv3029_get_sr(dev
, regs
);
437 dev_err(dev
, "%s: reading SR failed\n", __func__
);
441 /* Activate all the alarms with AE_x bit */
442 regs
[RV3029_A_SC
- RV3029_A_SC
] = bin2bcd(tm
->tm_sec
) | RV3029_A_AE_X
;
443 regs
[RV3029_A_MN
- RV3029_A_SC
] = bin2bcd(tm
->tm_min
) | RV3029_A_AE_X
;
444 regs
[RV3029_A_HR
- RV3029_A_SC
] = (bin2bcd(tm
->tm_hour
) & 0x3f)
446 regs
[RV3029_A_DT
- RV3029_A_SC
] = (bin2bcd(tm
->tm_mday
) & 0x3f)
448 regs
[RV3029_A_MO
- RV3029_A_SC
] = (bin2bcd(tm
->tm_mon
+ 1) & 0x1f)
450 regs
[RV3029_A_DW
- RV3029_A_SC
] = (bin2bcd(tm
->tm_wday
+ 1) & 0x7)
452 regs
[RV3029_A_YR
- RV3029_A_SC
] = (bin2bcd(tm
->tm_year
- 100))
455 /* Write the alarm */
456 ret
= rv3029_write_regs(dev
, RV3029_A_SC
, regs
,
457 RV3029_ALARM_SECTION_LEN
);
461 if (alarm
->enabled
) {
463 ret
= rv3029_update_bits(dev
, RV3029_IRQ_FLAGS
,
464 RV3029_IRQ_FLAGS_AF
, 0);
466 dev_err(dev
, "can't clear alarm flag\n");
470 ret
= rv3029_rtc_alarm_set_irq(dev
, 1);
474 dev_dbg(dev
, "alarm IRQ armed\n");
476 /* disable AIE irq */
477 ret
= rv3029_rtc_alarm_set_irq(dev
, 0);
481 dev_dbg(dev
, "alarm IRQ disabled\n");
487 static int rv3029_set_time(struct device
*dev
, struct rtc_time
*tm
)
493 * The clock has an 8 bit wide bcd-coded register (they never learn)
494 * for the year. tm_year is an offset from 1900 and we are interested
495 * in the 2000-2099 range, so any value less than 100 is invalid.
497 if (tm
->tm_year
< 100)
500 regs
[RV3029_W_SEC
- RV3029_W_SEC
] = bin2bcd(tm
->tm_sec
);
501 regs
[RV3029_W_MINUTES
- RV3029_W_SEC
] = bin2bcd(tm
->tm_min
);
502 regs
[RV3029_W_HOURS
- RV3029_W_SEC
] = bin2bcd(tm
->tm_hour
);
503 regs
[RV3029_W_DATE
- RV3029_W_SEC
] = bin2bcd(tm
->tm_mday
);
504 regs
[RV3029_W_MONTHS
- RV3029_W_SEC
] = bin2bcd(tm
->tm_mon
+ 1);
505 regs
[RV3029_W_DAYS
- RV3029_W_SEC
] = bin2bcd((tm
->tm_wday
& 7) + 1);
506 regs
[RV3029_W_YEARS
- RV3029_W_SEC
] = bin2bcd(tm
->tm_year
- 100);
508 ret
= rv3029_write_regs(dev
, RV3029_W_SEC
, regs
,
509 RV3029_WATCH_SECTION_LEN
);
513 ret
= rv3029_get_sr(dev
, regs
);
515 dev_err(dev
, "%s: reading SR failed\n", __func__
);
519 ret
= rv3029_set_sr(dev
, (regs
[0] & ~RV3029_STATUS_PON
));
521 dev_err(dev
, "%s: reading SR failed\n", __func__
);
528 static const struct rv3029_trickle_tab_elem
{
529 u32 r
; /* resistance in ohms */
530 u8 conf
; /* trickle config bits */
531 } rv3029_trickle_tab
[] = {
534 .conf
= RV3029_TRICKLE_1K
| RV3029_TRICKLE_5K
|
535 RV3029_TRICKLE_20K
| RV3029_TRICKLE_80K
,
538 .conf
= RV3029_TRICKLE_1K
| RV3029_TRICKLE_5K
|
542 .conf
= RV3029_TRICKLE_1K
| RV3029_TRICKLE_5K
|
546 .conf
= RV3029_TRICKLE_1K
| RV3029_TRICKLE_5K
,
549 .conf
= RV3029_TRICKLE_1K
| RV3029_TRICKLE_20K
|
553 .conf
= RV3029_TRICKLE_1K
| RV3029_TRICKLE_20K
,
556 .conf
= RV3029_TRICKLE_1K
| RV3029_TRICKLE_80K
,
559 .conf
= RV3029_TRICKLE_1K
,
562 .conf
= RV3029_TRICKLE_5K
| RV3029_TRICKLE_20K
|
566 .conf
= RV3029_TRICKLE_5K
| RV3029_TRICKLE_20K
,
569 .conf
= RV3029_TRICKLE_5K
| RV3029_TRICKLE_80K
,
572 .conf
= RV3029_TRICKLE_5K
,
575 .conf
= RV3029_TRICKLE_20K
| RV3029_TRICKLE_80K
,
578 .conf
= RV3029_TRICKLE_20K
,
581 .conf
= RV3029_TRICKLE_80K
,
585 static void rv3029_trickle_config(struct device
*dev
)
587 struct device_node
*of_node
= dev
->of_node
;
588 const struct rv3029_trickle_tab_elem
*elem
;
596 /* Configure the trickle charger. */
597 err
= of_property_read_u32(of_node
, "trickle-resistor-ohms", &ohms
);
599 /* Disable trickle charger. */
600 trickle_set_bits
= 0;
602 /* Enable trickle charger. */
603 for (i
= 0; i
< ARRAY_SIZE(rv3029_trickle_tab
); i
++) {
604 elem
= &rv3029_trickle_tab
[i
];
608 trickle_set_bits
= elem
->conf
;
610 "Trickle charger enabled at %d ohms resistance.\n",
613 err
= rv3029_eeprom_update_bits(dev
, RV3029_CONTROL_E2P_EECTRL
,
617 dev_err(dev
, "Failed to update trickle charger config\n");
620 #ifdef CONFIG_RTC_DRV_RV3029_HWMON
622 static int rv3029_read_temp(struct device
*dev
, int *temp_mC
)
627 ret
= rv3029_read_regs(dev
, RV3029_TEMP_PAGE
, &temp
, 1);
631 *temp_mC
= ((int)temp
- 60) * 1000;
636 static ssize_t
rv3029_hwmon_show_temp(struct device
*dev
,
637 struct device_attribute
*attr
,
642 ret
= rv3029_read_temp(dev
, &temp_mC
);
646 return sprintf(buf
, "%d\n", temp_mC
);
649 static ssize_t
rv3029_hwmon_set_update_interval(struct device
*dev
,
650 struct device_attribute
*attr
,
654 unsigned long interval_ms
;
658 ret
= kstrtoul(buf
, 10, &interval_ms
);
662 if (interval_ms
!= 0) {
663 th_set_bits
|= RV3029_EECTRL_THE
;
664 if (interval_ms
>= 16000)
665 th_set_bits
|= RV3029_EECTRL_THP
;
667 ret
= rv3029_eeprom_update_bits(dev
, RV3029_CONTROL_E2P_EECTRL
,
668 RV3029_EECTRL_THE
| RV3029_EECTRL_THP
,
676 static ssize_t
rv3029_hwmon_show_update_interval(struct device
*dev
,
677 struct device_attribute
*attr
,
680 int ret
, interval_ms
;
683 ret
= rv3029_eeprom_read(dev
, RV3029_CONTROL_E2P_EECTRL
,
688 if (eectrl
& RV3029_EECTRL_THE
) {
689 if (eectrl
& RV3029_EECTRL_THP
)
697 return sprintf(buf
, "%d\n", interval_ms
);
700 static SENSOR_DEVICE_ATTR(temp1_input
, S_IRUGO
, rv3029_hwmon_show_temp
,
702 static SENSOR_DEVICE_ATTR(update_interval
, S_IWUSR
| S_IRUGO
,
703 rv3029_hwmon_show_update_interval
,
704 rv3029_hwmon_set_update_interval
, 0);
706 static struct attribute
*rv3029_hwmon_attrs
[] = {
707 &sensor_dev_attr_temp1_input
.dev_attr
.attr
,
708 &sensor_dev_attr_update_interval
.dev_attr
.attr
,
711 ATTRIBUTE_GROUPS(rv3029_hwmon
);
713 static void rv3029_hwmon_register(struct device
*dev
, const char *name
)
715 struct rv3029_data
*rv3029
= dev_get_drvdata(dev
);
716 struct device
*hwmon_dev
;
718 hwmon_dev
= devm_hwmon_device_register_with_groups(dev
, name
, rv3029
,
719 rv3029_hwmon_groups
);
720 if (IS_ERR(hwmon_dev
)) {
721 dev_warn(dev
, "unable to register hwmon device %ld\n",
726 #else /* CONFIG_RTC_DRV_RV3029_HWMON */
728 static void rv3029_hwmon_register(struct device
*dev
, const char *name
)
732 #endif /* CONFIG_RTC_DRV_RV3029_HWMON */
734 static const struct rtc_class_ops rv3029_rtc_ops
= {
735 .read_time
= rv3029_read_time
,
736 .set_time
= rv3029_set_time
,
737 .read_alarm
= rv3029_read_alarm
,
738 .set_alarm
= rv3029_set_alarm
,
741 static struct i2c_device_id rv3029_id
[] = {
746 MODULE_DEVICE_TABLE(i2c
, rv3029_id
);
748 static int rv3029_probe(struct device
*dev
, struct regmap
*regmap
, int irq
,
751 struct rv3029_data
*rv3029
;
755 rv3029
= devm_kzalloc(dev
, sizeof(*rv3029
), GFP_KERNEL
);
759 rv3029
->regmap
= regmap
;
762 dev_set_drvdata(dev
, rv3029
);
764 rc
= rv3029_get_sr(dev
, buf
);
766 dev_err(dev
, "reading status failed\n");
770 rv3029_trickle_config(dev
);
771 rv3029_hwmon_register(dev
, name
);
773 rv3029
->rtc
= devm_rtc_device_register(dev
, name
, &rv3029_rtc_ops
,
776 return PTR_ERR_OR_ZERO(rv3029
->rtc
);
779 #if IS_ENABLED(CONFIG_I2C)
781 static int rv3029_i2c_probe(struct i2c_client
*client
,
782 const struct i2c_device_id
*id
)
784 struct regmap
*regmap
;
785 static const struct regmap_config config
= {
790 if (!i2c_check_functionality(client
->adapter
, I2C_FUNC_SMBUS_I2C_BLOCK
|
791 I2C_FUNC_SMBUS_BYTE
)) {
792 dev_err(&client
->dev
, "Adapter does not support SMBUS_I2C_BLOCK or SMBUS_I2C_BYTE\n");
796 regmap
= devm_regmap_init_i2c(client
, &config
);
797 if (IS_ERR(regmap
)) {
798 dev_err(&client
->dev
, "%s: regmap allocation failed: %ld\n",
799 __func__
, PTR_ERR(regmap
));
800 return PTR_ERR(regmap
);
803 return rv3029_probe(&client
->dev
, regmap
, client
->irq
, client
->name
);
806 static struct i2c_driver rv3029_driver
= {
808 .name
= "rtc-rv3029c2",
810 .probe
= rv3029_i2c_probe
,
811 .id_table
= rv3029_id
,
814 static int rv3029_register_driver(void)
816 return i2c_add_driver(&rv3029_driver
);
819 static void rv3029_unregister_driver(void)
821 i2c_del_driver(&rv3029_driver
);
826 static int rv3029_register_driver(void)
831 static void rv3029_unregister_driver(void)
837 #if IS_ENABLED(CONFIG_SPI_MASTER)
839 static int rv3049_probe(struct spi_device
*spi
)
841 static const struct regmap_config config
= {
845 struct regmap
*regmap
;
847 regmap
= devm_regmap_init_spi(spi
, &config
);
848 if (IS_ERR(regmap
)) {
849 dev_err(&spi
->dev
, "%s: regmap allocation failed: %ld\n",
850 __func__
, PTR_ERR(regmap
));
851 return PTR_ERR(regmap
);
854 return rv3029_probe(&spi
->dev
, regmap
, spi
->irq
, "rv3049");
857 static struct spi_driver rv3049_driver
= {
861 .probe
= rv3049_probe
,
864 static int rv3049_register_driver(void)
866 return spi_register_driver(&rv3049_driver
);
869 static void rv3049_unregister_driver(void)
871 spi_unregister_driver(&rv3049_driver
);
876 static int rv3049_register_driver(void)
881 static void rv3049_unregister_driver(void)
887 static int __init
rv30x9_init(void)
891 ret
= rv3029_register_driver();
893 pr_err("Failed to register rv3029 driver: %d\n", ret
);
897 ret
= rv3049_register_driver();
899 pr_err("Failed to register rv3049 driver: %d\n", ret
);
900 rv3029_unregister_driver();
905 module_init(rv30x9_init
)
907 static void __exit
rv30x9_exit(void)
909 rv3049_unregister_driver();
910 rv3029_unregister_driver();
912 module_exit(rv30x9_exit
)
914 MODULE_AUTHOR("Gregory Hermant <gregory.hermant@calao-systems.com>");
915 MODULE_AUTHOR("Michael Buesch <m@bues.ch>");
916 MODULE_DESCRIPTION("Micro Crystal RV3029/RV3049 RTC driver");
917 MODULE_LICENSE("GPL");
918 MODULE_ALIAS("spi:rv3049");