Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * TI LP8788 MFD - rtc driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright 2012 Texas Instruments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/irqdomain.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/mfd/lp8788.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/rtc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) /* register address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #define LP8788_INTEN_3			0x05
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #define LP8788_RTC_UNLOCK		0x64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define LP8788_RTC_SEC			0x70
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define LP8788_ALM1_SEC			0x77
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define LP8788_ALM1_EN			0x7D
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define LP8788_ALM2_SEC			0x7E
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define LP8788_ALM2_EN			0x84
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) /* mask/shift bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define LP8788_INT_RTC_ALM1_M		BIT(1)	/* Addr 05h */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define LP8788_INT_RTC_ALM1_S		1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define LP8788_INT_RTC_ALM2_M		BIT(2)	/* Addr 05h */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define LP8788_INT_RTC_ALM2_S		2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define LP8788_ALM_EN_M			BIT(7)	/* Addr 7Dh or 84h */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define LP8788_ALM_EN_S			7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define DEFAULT_ALARM_SEL		LP8788_ALARM_1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define LP8788_MONTH_OFFSET		1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define LP8788_BASE_YEAR		2000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define MAX_WDAY_BITS			7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #define LP8788_WDAY_SET			1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #define RTC_UNLOCK			0x1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define RTC_LATCH			0x2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define ALARM_IRQ_FLAG			(RTC_IRQF | RTC_AF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) enum lp8788_time {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	LPTIME_SEC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	LPTIME_MIN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	LPTIME_HOUR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	LPTIME_MDAY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	LPTIME_MON,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	LPTIME_YEAR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	LPTIME_WDAY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	LPTIME_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) struct lp8788_rtc {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	struct lp8788 *lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	struct rtc_device *rdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	enum lp8788_alarm_sel alarm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) static const u8 addr_alarm_sec[LP8788_ALARM_MAX] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	LP8788_ALM1_SEC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	LP8788_ALM2_SEC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) static const u8 addr_alarm_en[LP8788_ALARM_MAX] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	LP8788_ALM1_EN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	LP8788_ALM2_EN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) static const u8 mask_alarm_en[LP8788_ALARM_MAX] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	LP8788_INT_RTC_ALM1_M,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	LP8788_INT_RTC_ALM2_M,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) static const u8 shift_alarm_en[LP8788_ALARM_MAX] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	LP8788_INT_RTC_ALM1_S,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	LP8788_INT_RTC_ALM2_S,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) static int _to_tm_wday(u8 lp8788_wday)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	if (lp8788_wday == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	/* lookup defined weekday from read register value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	for (i = 0; i < MAX_WDAY_BITS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		if ((lp8788_wday >> i) == LP8788_WDAY_SET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	return i + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) static inline int _to_lp8788_wday(int tm_wday)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	return LP8788_WDAY_SET << (tm_wday - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static void lp8788_rtc_unlock(struct lp8788 *lp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	lp8788_write_byte(lp, LP8788_RTC_UNLOCK, RTC_UNLOCK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	lp8788_write_byte(lp, LP8788_RTC_UNLOCK, RTC_LATCH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static int lp8788_rtc_read_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	struct lp8788_rtc *rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	struct lp8788 *lp = rtc->lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	u8 data[LPTIME_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	lp8788_rtc_unlock(lp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	ret = lp8788_read_multi_bytes(lp, LP8788_RTC_SEC, data,	LPTIME_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	tm->tm_sec  = data[LPTIME_SEC];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	tm->tm_min  = data[LPTIME_MIN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	tm->tm_hour = data[LPTIME_HOUR];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	tm->tm_mday = data[LPTIME_MDAY];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	tm->tm_mon  = data[LPTIME_MON] - LP8788_MONTH_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	tm->tm_year = data[LPTIME_YEAR] + LP8788_BASE_YEAR - 1900;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	tm->tm_wday = _to_tm_wday(data[LPTIME_WDAY]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static int lp8788_rtc_set_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	struct lp8788_rtc *rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	struct lp8788 *lp = rtc->lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	u8 data[LPTIME_MAX - 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	int ret, i, year;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	year = tm->tm_year + 1900 - LP8788_BASE_YEAR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	if (year < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		dev_err(lp->dev, "invalid year: %d\n", year);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	/* because rtc weekday is a readonly register, do not update */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	data[LPTIME_SEC]  = tm->tm_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	data[LPTIME_MIN]  = tm->tm_min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	data[LPTIME_HOUR] = tm->tm_hour;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	data[LPTIME_MDAY] = tm->tm_mday;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	data[LPTIME_MON]  = tm->tm_mon + LP8788_MONTH_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	data[LPTIME_YEAR] = year;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	for (i = 0; i < ARRAY_SIZE(data); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		ret = lp8788_write_byte(lp, LP8788_RTC_SEC + i, data[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static int lp8788_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	struct lp8788_rtc *rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	struct lp8788 *lp = rtc->lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	struct rtc_time *tm = &alarm->time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	u8 addr, data[LPTIME_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	addr = addr_alarm_sec[rtc->alarm];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	ret = lp8788_read_multi_bytes(lp, addr, data, LPTIME_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	tm->tm_sec  = data[LPTIME_SEC];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	tm->tm_min  = data[LPTIME_MIN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	tm->tm_hour = data[LPTIME_HOUR];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	tm->tm_mday = data[LPTIME_MDAY];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	tm->tm_mon  = data[LPTIME_MON] - LP8788_MONTH_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	tm->tm_year = data[LPTIME_YEAR] + LP8788_BASE_YEAR - 1900;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	tm->tm_wday = _to_tm_wday(data[LPTIME_WDAY]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	alarm->enabled = data[LPTIME_WDAY] & LP8788_ALM_EN_M;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) static int lp8788_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	struct lp8788_rtc *rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	struct lp8788 *lp = rtc->lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	struct rtc_time *tm = &alarm->time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	u8 addr, data[LPTIME_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	int ret, i, year;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	year = tm->tm_year + 1900 - LP8788_BASE_YEAR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	if (year < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		dev_err(lp->dev, "invalid year: %d\n", year);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	data[LPTIME_SEC]  = tm->tm_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	data[LPTIME_MIN]  = tm->tm_min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	data[LPTIME_HOUR] = tm->tm_hour;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	data[LPTIME_MDAY] = tm->tm_mday;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	data[LPTIME_MON]  = tm->tm_mon + LP8788_MONTH_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	data[LPTIME_YEAR] = year;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	data[LPTIME_WDAY] = _to_lp8788_wday(tm->tm_wday);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	for (i = 0; i < ARRAY_SIZE(data); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		addr = addr_alarm_sec[rtc->alarm] + i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		ret = lp8788_write_byte(lp, addr, data[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	alarm->enabled = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	addr = addr_alarm_en[rtc->alarm];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	return lp8788_update_bits(lp, addr, LP8788_ALM_EN_M,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 				alarm->enabled << LP8788_ALM_EN_S);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static int lp8788_alarm_irq_enable(struct device *dev, unsigned int enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	struct lp8788_rtc *rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	struct lp8788 *lp = rtc->lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	u8 mask, shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	if (!rtc->irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	mask = mask_alarm_en[rtc->alarm];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	shift = shift_alarm_en[rtc->alarm];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	return lp8788_update_bits(lp, LP8788_INTEN_3, mask, enable << shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static const struct rtc_class_ops lp8788_rtc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	.read_time = lp8788_rtc_read_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	.set_time = lp8788_rtc_set_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	.read_alarm = lp8788_read_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	.set_alarm = lp8788_set_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	.alarm_irq_enable = lp8788_alarm_irq_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static irqreturn_t lp8788_alarm_irq_handler(int irq, void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	struct lp8788_rtc *rtc = ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	rtc_update_irq(rtc->rdev, 1, ALARM_IRQ_FLAG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static int lp8788_alarm_irq_register(struct platform_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 				struct lp8788_rtc *rtc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	struct resource *r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	struct lp8788 *lp = rtc->lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	struct irq_domain *irqdm = lp->irqdm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	rtc->irq = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	/* even the alarm IRQ number is not specified, rtc time should work */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, LP8788_ALM_IRQ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	if (!r)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	if (rtc->alarm == LP8788_ALARM_1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		irq = r->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		irq = r->end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	rtc->irq = irq_create_mapping(irqdm, irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	return devm_request_threaded_irq(&pdev->dev, rtc->irq, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 				lp8788_alarm_irq_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 				0, LP8788_ALM_IRQ, rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) static int lp8788_rtc_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	struct lp8788_rtc *rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	rtc = devm_kzalloc(dev, sizeof(struct lp8788_rtc), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	if (!rtc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	rtc->lp = lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	rtc->alarm = lp->pdata ? lp->pdata->alarm_sel : DEFAULT_ALARM_SEL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	platform_set_drvdata(pdev, rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	device_init_wakeup(dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	rtc->rdev = devm_rtc_device_register(dev, "lp8788_rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 					&lp8788_rtc_ops, THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	if (IS_ERR(rtc->rdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		dev_err(dev, "can not register rtc device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		return PTR_ERR(rtc->rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	if (lp8788_alarm_irq_register(pdev, rtc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		dev_warn(lp->dev, "no rtc irq handler\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) static struct platform_driver lp8788_rtc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	.probe = lp8788_rtc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 		.name = LP8788_DEV_RTC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) module_platform_driver(lp8788_rtc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) MODULE_DESCRIPTION("Texas Instruments LP8788 RTC Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) MODULE_AUTHOR("Milo Kim");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) MODULE_ALIAS("platform:lp8788-rtc");