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)  * RTC driver for Maxim MAX8925
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2009-2010 Marvell International Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *	Haojian Zhuang <haojian.zhuang@marvell.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/rtc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/mfd/max8925.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	RTC_SEC = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	RTC_MIN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	RTC_HOUR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	RTC_WEEKDAY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	RTC_DATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	RTC_MONTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	RTC_YEAR1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	RTC_YEAR2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define MAX8925_RTC_SEC			0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define MAX8925_RTC_MIN			0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define MAX8925_RTC_HOUR		0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define MAX8925_RTC_WEEKDAY		0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define MAX8925_RTC_DATE		0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define MAX8925_RTC_MONTH		0x05
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define MAX8925_RTC_YEAR1		0x06
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define MAX8925_RTC_YEAR2		0x07
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define MAX8925_ALARM0_SEC		0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define MAX8925_ALARM0_MIN		0x09
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define MAX8925_ALARM0_HOUR		0x0a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define MAX8925_ALARM0_WEEKDAY		0x0b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #define MAX8925_ALARM0_DATE		0x0c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #define MAX8925_ALARM0_MON		0x0d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define MAX8925_ALARM0_YEAR1		0x0e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define MAX8925_ALARM0_YEAR2		0x0f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #define MAX8925_ALARM1_SEC		0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #define MAX8925_ALARM1_MIN		0x11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) #define MAX8925_ALARM1_HOUR		0x12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) #define MAX8925_ALARM1_WEEKDAY		0x13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) #define MAX8925_ALARM1_DATE		0x14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) #define MAX8925_ALARM1_MON		0x15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) #define MAX8925_ALARM1_YEAR1		0x16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) #define MAX8925_ALARM1_YEAR2		0x17
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) #define MAX8925_RTC_CNTL		0x1b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) #define MAX8925_RTC_STATUS		0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) #define TIME_NUM			8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) #define ALARM_1SEC			(1 << 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) #define HOUR_12				(1 << 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) #define HOUR_AM_PM			(1 << 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) #define ALARM0_IRQ			(1 << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) #define ALARM1_IRQ			(1 << 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) #define ALARM0_STATUS			(1 << 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) #define ALARM1_STATUS			(1 << 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) struct max8925_rtc_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	struct rtc_device	*rtc_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	struct max8925_chip	*chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	struct i2c_client	*rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	struct device		*dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	int			irq;
^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 irqreturn_t rtc_update_handler(int irq, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	struct max8925_rtc_info *info = (struct max8925_rtc_info *)data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	/* disable ALARM0 except for 1SEC alarm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	max8925_set_bits(info->rtc, MAX8925_ALARM0_CNTL, 0x7f, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	return IRQ_HANDLED;
^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 tm_calc(struct rtc_time *tm, unsigned char *buf, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	if (len < TIME_NUM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	tm->tm_year = (buf[RTC_YEAR2] >> 4) * 1000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 			+ (buf[RTC_YEAR2] & 0xf) * 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 			+ (buf[RTC_YEAR1] >> 4) * 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 			+ (buf[RTC_YEAR1] & 0xf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	tm->tm_year -= 1900;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	tm->tm_mon = ((buf[RTC_MONTH] >> 4) & 0x01) * 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 			+ (buf[RTC_MONTH] & 0x0f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	tm->tm_mday = ((buf[RTC_DATE] >> 4) & 0x03) * 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 			+ (buf[RTC_DATE] & 0x0f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	tm->tm_wday = buf[RTC_WEEKDAY] & 0x07;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	if (buf[RTC_HOUR] & HOUR_12) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		tm->tm_hour = ((buf[RTC_HOUR] >> 4) & 0x1) * 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 				+ (buf[RTC_HOUR] & 0x0f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		if (buf[RTC_HOUR] & HOUR_AM_PM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 			tm->tm_hour += 12;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		tm->tm_hour = ((buf[RTC_HOUR] >> 4) & 0x03) * 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 				+ (buf[RTC_HOUR] & 0x0f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	tm->tm_min = ((buf[RTC_MIN] >> 4) & 0x7) * 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 			+ (buf[RTC_MIN] & 0x0f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	tm->tm_sec = ((buf[RTC_SEC] >> 4) & 0x7) * 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 			+ (buf[RTC_SEC] & 0x0f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static int data_calc(unsigned char *buf, struct rtc_time *tm, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	unsigned char high, low;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	if (len < TIME_NUM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	high = (tm->tm_year + 1900) / 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	low = (tm->tm_year + 1900) / 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	low = low - high * 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	buf[RTC_YEAR2] = (high << 4) + low;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	high = (tm->tm_year + 1900) / 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	low = tm->tm_year + 1900;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	low = low - high * 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	high = high - (high / 10) * 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	buf[RTC_YEAR1] = (high << 4) + low;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	high = tm->tm_mon / 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	low = tm->tm_mon;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	low = low - high * 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	buf[RTC_MONTH] = (high << 4) + low;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	high = tm->tm_mday / 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	low = tm->tm_mday;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	low = low - high * 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	buf[RTC_DATE] = (high << 4) + low;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	buf[RTC_WEEKDAY] = tm->tm_wday;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	high = tm->tm_hour / 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	low = tm->tm_hour;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	low = low - high * 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	buf[RTC_HOUR] = (high << 4) + low;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	high = tm->tm_min / 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	low = tm->tm_min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	low = low - high * 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	buf[RTC_MIN] = (high << 4) + low;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	high = tm->tm_sec / 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	low = tm->tm_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	low = low - high * 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	buf[RTC_SEC] = (high << 4) + low;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static int max8925_rtc_read_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	struct max8925_rtc_info *info = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	unsigned char buf[TIME_NUM];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	ret = max8925_bulk_read(info->rtc, MAX8925_RTC_SEC, TIME_NUM, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	ret = tm_calc(tm, buf, TIME_NUM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static int max8925_rtc_set_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	struct max8925_rtc_info *info = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	unsigned char buf[TIME_NUM];
^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) 	ret = data_calc(buf, tm, TIME_NUM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	ret = max8925_bulk_write(info->rtc, MAX8925_RTC_SEC, TIME_NUM, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) static int max8925_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	struct max8925_rtc_info *info = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	unsigned char buf[TIME_NUM];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	ret = max8925_bulk_read(info->rtc, MAX8925_ALARM0_SEC, TIME_NUM, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	ret = tm_calc(&alrm->time, buf, TIME_NUM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	ret = max8925_reg_read(info->rtc, MAX8925_RTC_IRQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	if (ret & ALARM0_IRQ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		alrm->enabled = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		ret = max8925_reg_read(info->rtc, MAX8925_ALARM0_CNTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 			alrm->enabled = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 			alrm->enabled = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	ret = max8925_reg_read(info->rtc, MAX8925_RTC_STATUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	if (ret & ALARM0_STATUS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		alrm->pending = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		alrm->pending = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) out:
^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) static int max8925_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	struct max8925_rtc_info *info = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	unsigned char buf[TIME_NUM];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	ret = data_calc(buf, &alrm->time, TIME_NUM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	ret = max8925_bulk_write(info->rtc, MAX8925_ALARM0_SEC, TIME_NUM, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	if (alrm->enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		/* only enable alarm on year/month/day/hour/min/sec */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		ret = max8925_reg_write(info->rtc, MAX8925_ALARM0_CNTL, 0x77);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		ret = max8925_reg_write(info->rtc, MAX8925_ALARM0_CNTL, 0x0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static const struct rtc_class_ops max8925_rtc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	.read_time	= max8925_rtc_read_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	.set_time	= max8925_rtc_set_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	.read_alarm	= max8925_rtc_read_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	.set_alarm	= max8925_rtc_set_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) static int max8925_rtc_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	struct max8925_rtc_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	info = devm_kzalloc(&pdev->dev, sizeof(struct max8925_rtc_info),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 			    GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	info->chip = chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	info->rtc = chip->rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	info->dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	info->irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 					rtc_update_handler, IRQF_ONESHOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 					"rtc-alarm0", info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 			info->irq, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	dev_set_drvdata(&pdev->dev, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	/* XXX - isn't this redundant? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	platform_set_drvdata(pdev, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	device_init_wakeup(&pdev->dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max8925-rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 					&max8925_rtc_ops, THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	ret = PTR_ERR(info->rtc_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	if (IS_ERR(info->rtc_dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) static int max8925_rtc_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	struct platform_device *pdev = to_platform_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	if (device_may_wakeup(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		chip->wakeup_flag |= 1 << MAX8925_IRQ_RTC_ALARM0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static int max8925_rtc_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	struct platform_device *pdev = to_platform_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	if (device_may_wakeup(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		chip->wakeup_flag &= ~(1 << MAX8925_IRQ_RTC_ALARM0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) static SIMPLE_DEV_PM_OPS(max8925_rtc_pm_ops, max8925_rtc_suspend, max8925_rtc_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) static struct platform_driver max8925_rtc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	.driver		= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 		.name	= "max8925-rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 		.pm     = &max8925_rtc_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	.probe		= max8925_rtc_probe,
^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(max8925_rtc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) MODULE_DESCRIPTION("Maxim MAX8925 RTC driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)