^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * drivers/rtc/rtc-spear.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2010 ST Microelectronics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Rajeev Kumar<rajeev-dlh.kumar@st.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * This file is licensed under the terms of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * License version 2. This program is licensed "as is" without any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * warranty of any kind, whether express or implied.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/bcd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/rtc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* RTC registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define TIME_REG 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define DATE_REG 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define ALARM_TIME_REG 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define ALARM_DATE_REG 0x0C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define CTRL_REG 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define STATUS_REG 0x14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /* TIME_REG & ALARM_TIME_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define SECONDS_UNITS (0xf<<0) /* seconds units position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define SECONDS_TENS (0x7<<4) /* seconds tens position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define MINUTES_UNITS (0xf<<8) /* minutes units position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define MINUTES_TENS (0x7<<12) /* minutes tens position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define HOURS_UNITS (0xf<<16) /* hours units position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define HOURS_TENS (0x3<<20) /* hours tens position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /* DATE_REG & ALARM_DATE_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define DAYS_UNITS (0xf<<0) /* days units position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define DAYS_TENS (0x3<<4) /* days tens position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define MONTHS_UNITS (0xf<<8) /* months units position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define MONTHS_TENS (0x1<<12) /* months tens position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define YEARS_UNITS (0xf<<16) /* years units position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define YEARS_TENS (0xf<<20) /* years tens position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define YEARS_HUNDREDS (0xf<<24) /* years hundereds position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define YEARS_MILLENIUMS (0xf<<28) /* years millenium position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /* MASK SHIFT TIME_REG & ALARM_TIME_REG*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define SECOND_SHIFT 0x00 /* seconds units */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define MINUTE_SHIFT 0x08 /* minutes units position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define HOUR_SHIFT 0x10 /* hours units position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define MDAY_SHIFT 0x00 /* Month day shift */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define MONTH_SHIFT 0x08 /* Month shift */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define YEAR_SHIFT 0x10 /* Year shift */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define SECOND_MASK 0x7F
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define MIN_MASK 0x7F
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define HOUR_MASK 0x3F
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define DAY_MASK 0x3F
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define MONTH_MASK 0x7F
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define YEAR_MASK 0xFFFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /* date reg equal to time reg, for debug only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define TIME_BYP (1<<9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define INT_ENABLE (1<<31) /* interrupt enable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* STATUS_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #define CLK_UNCONNECTED (1<<0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #define PEND_WR_TIME (1<<2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #define PEND_WR_DATE (1<<3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #define LOST_WR_TIME (1<<4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #define LOST_WR_DATE (1<<5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #define RTC_INT_MASK (1<<31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #define STATUS_BUSY (PEND_WR_TIME | PEND_WR_DATE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #define STATUS_FAIL (LOST_WR_TIME | LOST_WR_DATE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct spear_rtc_config {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct rtc_device *rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct clk *clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) void __iomem *ioaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) unsigned int irq_wake;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static inline void spear_rtc_clear_interrupt(struct spear_rtc_config *config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) unsigned int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) spin_lock_irqsave(&config->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) val = readl(config->ioaddr + STATUS_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) val |= RTC_INT_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) writel(val, config->ioaddr + STATUS_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) spin_unlock_irqrestore(&config->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static inline void spear_rtc_enable_interrupt(struct spear_rtc_config *config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) unsigned int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) val = readl(config->ioaddr + CTRL_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (!(val & INT_ENABLE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) spear_rtc_clear_interrupt(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) val |= INT_ENABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) writel(val, config->ioaddr + CTRL_REG);
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static inline void spear_rtc_disable_interrupt(struct spear_rtc_config *config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) unsigned int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) val = readl(config->ioaddr + CTRL_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (val & INT_ENABLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) val &= ~INT_ENABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) writel(val, config->ioaddr + CTRL_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static inline int is_write_complete(struct spear_rtc_config *config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) spin_lock_irqsave(&config->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if ((readl(config->ioaddr + STATUS_REG)) & STATUS_FAIL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) spin_unlock_irqrestore(&config->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static void rtc_wait_not_busy(struct spear_rtc_config *config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) int status, count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /* Assuming BUSY may stay active for 80 msec) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) for (count = 0; count < 80; count++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) spin_lock_irqsave(&config->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) status = readl(config->ioaddr + STATUS_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) spin_unlock_irqrestore(&config->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if ((status & STATUS_BUSY) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) /* check status busy, after each msec */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) msleep(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) static irqreturn_t spear_rtc_irq(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) struct spear_rtc_config *config = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) unsigned long flags, events = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) unsigned int irq_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) spin_lock_irqsave(&config->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) irq_data = readl(config->ioaddr + STATUS_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) spin_unlock_irqrestore(&config->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if ((irq_data & RTC_INT_MASK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) spear_rtc_clear_interrupt(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) events = RTC_IRQF | RTC_AF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) rtc_update_irq(config->rtc, 1, events);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) static void tm2bcd(struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) tm->tm_sec = bin2bcd(tm->tm_sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) tm->tm_min = bin2bcd(tm->tm_min);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) tm->tm_hour = bin2bcd(tm->tm_hour);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) tm->tm_mday = bin2bcd(tm->tm_mday);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) tm->tm_mon = bin2bcd(tm->tm_mon + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) tm->tm_year = bin2bcd(tm->tm_year);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) static void bcd2tm(struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) tm->tm_sec = bcd2bin(tm->tm_sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) tm->tm_min = bcd2bin(tm->tm_min);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) tm->tm_hour = bcd2bin(tm->tm_hour);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) tm->tm_mday = bcd2bin(tm->tm_mday);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) tm->tm_mon = bcd2bin(tm->tm_mon) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) /* epoch == 1900 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) tm->tm_year = bcd2bin(tm->tm_year);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * spear_rtc_read_time - set the time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * @dev: rtc device in use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * @tm: holds date and time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) * This function read time and date. On success it will return 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) * otherwise -ve error is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) static int spear_rtc_read_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) struct spear_rtc_config *config = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) unsigned int time, date;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) /* we don't report wday/yday/isdst ... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) rtc_wait_not_busy(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) time = readl(config->ioaddr + TIME_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) date = readl(config->ioaddr + DATE_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) tm->tm_sec = (time >> SECOND_SHIFT) & SECOND_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) tm->tm_min = (time >> MINUTE_SHIFT) & MIN_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) tm->tm_hour = (time >> HOUR_SHIFT) & HOUR_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) tm->tm_mday = (date >> MDAY_SHIFT) & DAY_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) tm->tm_mon = (date >> MONTH_SHIFT) & MONTH_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) tm->tm_year = (date >> YEAR_SHIFT) & YEAR_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) bcd2tm(tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^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) * spear_rtc_set_time - set the time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) * @dev: rtc device in use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * @tm: holds date and time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * This function set time and date. On success it will return 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * otherwise -ve error is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static int spear_rtc_set_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) struct spear_rtc_config *config = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) unsigned int time, date;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) tm2bcd(tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) rtc_wait_not_busy(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) time = (tm->tm_sec << SECOND_SHIFT) | (tm->tm_min << MINUTE_SHIFT) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) (tm->tm_hour << HOUR_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) date = (tm->tm_mday << MDAY_SHIFT) | (tm->tm_mon << MONTH_SHIFT) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) (tm->tm_year << YEAR_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) writel(time, config->ioaddr + TIME_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) writel(date, config->ioaddr + DATE_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) return is_write_complete(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) * spear_rtc_read_alarm - read the alarm time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) * @dev: rtc device in use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) * @alm: holds alarm date and time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) * This function read alarm time and date. On success it will return 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) * otherwise -ve error is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) static int spear_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) struct spear_rtc_config *config = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) unsigned int time, date;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) rtc_wait_not_busy(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) time = readl(config->ioaddr + ALARM_TIME_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) date = readl(config->ioaddr + ALARM_DATE_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) alm->time.tm_sec = (time >> SECOND_SHIFT) & SECOND_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) alm->time.tm_min = (time >> MINUTE_SHIFT) & MIN_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) alm->time.tm_hour = (time >> HOUR_SHIFT) & HOUR_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) alm->time.tm_mday = (date >> MDAY_SHIFT) & DAY_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) alm->time.tm_mon = (date >> MONTH_SHIFT) & MONTH_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) alm->time.tm_year = (date >> YEAR_SHIFT) & YEAR_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) bcd2tm(&alm->time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) alm->enabled = readl(config->ioaddr + CTRL_REG) & INT_ENABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) * spear_rtc_set_alarm - set the alarm time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * @dev: rtc device in use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) * @alm: holds alarm date and time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) * This function set alarm time and date. On success it will return 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) * otherwise -ve error is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) static int spear_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) struct spear_rtc_config *config = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) unsigned int time, date;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) tm2bcd(&alm->time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) rtc_wait_not_busy(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) time = (alm->time.tm_sec << SECOND_SHIFT) | (alm->time.tm_min <<
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) MINUTE_SHIFT) | (alm->time.tm_hour << HOUR_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) date = (alm->time.tm_mday << MDAY_SHIFT) | (alm->time.tm_mon <<
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) MONTH_SHIFT) | (alm->time.tm_year << YEAR_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) writel(time, config->ioaddr + ALARM_TIME_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) writel(date, config->ioaddr + ALARM_DATE_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) err = is_write_complete(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) if (alm->enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) spear_rtc_enable_interrupt(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) spear_rtc_disable_interrupt(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) static int spear_alarm_irq_enable(struct device *dev, unsigned int enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) struct spear_rtc_config *config = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) spear_rtc_clear_interrupt(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) switch (enabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) /* alarm off */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) spear_rtc_disable_interrupt(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) case 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) /* alarm on */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) spear_rtc_enable_interrupt(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) static const struct rtc_class_ops spear_rtc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) .read_time = spear_rtc_read_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) .set_time = spear_rtc_set_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) .read_alarm = spear_rtc_read_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) .set_alarm = spear_rtc_set_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) .alarm_irq_enable = spear_alarm_irq_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) static int spear_rtc_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) struct spear_rtc_config *config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) int status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) if (!config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) /* alarm irqs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) if (irq < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) return irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) status = devm_request_irq(&pdev->dev, irq, spear_rtc_irq, 0, pdev->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) if (status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) dev_err(&pdev->dev, "Alarm interrupt IRQ%d already claimed\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) config->ioaddr = devm_platform_ioremap_resource(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if (IS_ERR(config->ioaddr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) return PTR_ERR(config->ioaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) config->clk = devm_clk_get(&pdev->dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) if (IS_ERR(config->clk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) return PTR_ERR(config->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) status = clk_prepare_enable(config->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) spin_lock_init(&config->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) platform_set_drvdata(pdev, config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) config->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) &spear_rtc_ops, THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (IS_ERR(config->rtc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) dev_err(&pdev->dev, "can't register RTC device, err %ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) PTR_ERR(config->rtc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) status = PTR_ERR(config->rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) goto err_disable_clock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) config->rtc->uie_unsupported = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) if (!device_can_wakeup(&pdev->dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) device_init_wakeup(&pdev->dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) err_disable_clock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) clk_disable_unprepare(config->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) static int spear_rtc_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) struct spear_rtc_config *config = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) spear_rtc_disable_interrupt(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) clk_disable_unprepare(config->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) device_init_wakeup(&pdev->dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) static int spear_rtc_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) struct platform_device *pdev = to_platform_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) struct spear_rtc_config *config = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (device_may_wakeup(&pdev->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if (!enable_irq_wake(irq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) config->irq_wake = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) spear_rtc_disable_interrupt(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) clk_disable(config->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) static int spear_rtc_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) struct platform_device *pdev = to_platform_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) struct spear_rtc_config *config = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (device_may_wakeup(&pdev->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) if (config->irq_wake) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) disable_irq_wake(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) config->irq_wake = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) clk_enable(config->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) spear_rtc_enable_interrupt(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) static SIMPLE_DEV_PM_OPS(spear_rtc_pm_ops, spear_rtc_suspend, spear_rtc_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) static void spear_rtc_shutdown(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) struct spear_rtc_config *config = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) spear_rtc_disable_interrupt(config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) clk_disable(config->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) static const struct of_device_id spear_rtc_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) { .compatible = "st,spear600-rtc" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) MODULE_DEVICE_TABLE(of, spear_rtc_id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) static struct platform_driver spear_rtc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) .probe = spear_rtc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) .remove = spear_rtc_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) .shutdown = spear_rtc_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) .name = "rtc-spear",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) .pm = &spear_rtc_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) .of_match_table = of_match_ptr(spear_rtc_id_table),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) module_platform_driver(spear_rtc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) MODULE_ALIAS("platform:rtc-spear");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) MODULE_AUTHOR("Rajeev Kumar <rajeev-dlh.kumar@st.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) MODULE_DESCRIPTION("ST SPEAr Realtime Clock Driver (RTC)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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