^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) * Real-time clock driver for MPC5121
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2007, Domen Puncer <domen.puncer@telargo.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright 2008, Freescale Semiconductor, Inc. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright 2011, Dmitry Eremin-Solenikov
^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/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.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/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/of_address.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/of_irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct mpc5121_rtc_regs {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) u8 set_time; /* RTC + 0x00 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) u8 hour_set; /* RTC + 0x01 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) u8 minute_set; /* RTC + 0x02 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) u8 second_set; /* RTC + 0x03 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) u8 set_date; /* RTC + 0x04 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) u8 month_set; /* RTC + 0x05 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) u8 weekday_set; /* RTC + 0x06 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) u8 date_set; /* RTC + 0x07 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) u8 write_sw; /* RTC + 0x08 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) u8 sw_set; /* RTC + 0x09 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) u16 year_set; /* RTC + 0x0a */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) u8 alm_enable; /* RTC + 0x0c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) u8 alm_hour_set; /* RTC + 0x0d */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) u8 alm_min_set; /* RTC + 0x0e */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) u8 int_enable; /* RTC + 0x0f */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) u8 reserved1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) u8 hour; /* RTC + 0x11 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) u8 minute; /* RTC + 0x12 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) u8 second; /* RTC + 0x13 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) u8 month; /* RTC + 0x14 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) u8 wday_mday; /* RTC + 0x15 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) u16 year; /* RTC + 0x16 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) u8 int_alm; /* RTC + 0x18 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) u8 int_sw; /* RTC + 0x19 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) u8 alm_status; /* RTC + 0x1a */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) u8 sw_minute; /* RTC + 0x1b */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) u8 bus_error_1; /* RTC + 0x1c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) u8 int_day; /* RTC + 0x1d */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) u8 int_min; /* RTC + 0x1e */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) u8 int_sec; /* RTC + 0x1f */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * target_time:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * intended to be used for hibernation but hibernation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * does not work on silicon rev 1.5 so use it for non-volatile
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * storage of offset between the actual_time register and linux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) u32 target_time; /* RTC + 0x20 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * actual_time:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * readonly time since VBAT_RTC was last connected
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) u32 actual_time; /* RTC + 0x24 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) u32 keep_alive; /* RTC + 0x28 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct mpc5121_rtc_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) unsigned irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) unsigned irq_periodic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct mpc5121_rtc_regs __iomem *regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct rtc_device *rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct rtc_wkalrm wkalarm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * Update second/minute/hour registers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * This is just so alarm will work.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static void mpc5121_rtc_update_smh(struct mpc5121_rtc_regs __iomem *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) out_8(®s->second_set, tm->tm_sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) out_8(®s->minute_set, tm->tm_min);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) out_8(®s->hour_set, tm->tm_hour);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /* set time sequence */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) out_8(®s->set_time, 0x1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) out_8(®s->set_time, 0x3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) out_8(®s->set_time, 0x1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) out_8(®s->set_time, 0x0);
^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 int mpc5121_rtc_read_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) unsigned long now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * linux time is actual_time plus the offset saved in target_time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) now = in_be32(®s->actual_time) + in_be32(®s->target_time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) rtc_time64_to_tm(now, tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * update second minute hour registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * so alarms will work
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) mpc5121_rtc_update_smh(regs, tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static int mpc5121_rtc_set_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) unsigned long now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * The actual_time register is read only so we write the offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * between it and linux time to the target_time register.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) now = rtc_tm_to_time64(tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) out_be32(®s->target_time, now - in_be32(®s->actual_time));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * update second minute hour registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * so alarms will work
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) mpc5121_rtc_update_smh(regs, tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static int mpc5200_rtc_read_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) int tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) tm->tm_sec = in_8(®s->second);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) tm->tm_min = in_8(®s->minute);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) /* 12 hour format? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (in_8(®s->hour) & 0x20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) tm->tm_hour = (in_8(®s->hour) >> 1) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) (in_8(®s->hour) & 1 ? 12 : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) tm->tm_hour = in_8(®s->hour);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) tmp = in_8(®s->wday_mday);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) tm->tm_mday = tmp & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) tm->tm_mon = in_8(®s->month) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) tm->tm_year = in_be16(®s->year) - 1900;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) tm->tm_wday = (tmp >> 5) % 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) tm->tm_isdst = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) static int mpc5200_rtc_set_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) mpc5121_rtc_update_smh(regs, tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) /* date */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) out_8(®s->month_set, tm->tm_mon + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) out_8(®s->weekday_set, tm->tm_wday ? tm->tm_wday : 7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) out_8(®s->date_set, tm->tm_mday);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) out_be16(®s->year_set, tm->tm_year + 1900);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) /* set date sequence */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) out_8(®s->set_date, 0x1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) out_8(®s->set_date, 0x3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) out_8(®s->set_date, 0x1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) out_8(®s->set_date, 0x0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) static int mpc5121_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) *alarm = rtc->wkalarm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) alarm->pending = in_8(®s->alm_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) static int mpc5121_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * the alarm has no seconds so deal with it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) if (alarm->time.tm_sec) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) alarm->time.tm_sec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) alarm->time.tm_min++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (alarm->time.tm_min >= 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) alarm->time.tm_min = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) alarm->time.tm_hour++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (alarm->time.tm_hour >= 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) alarm->time.tm_hour = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) alarm->time.tm_mday = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) alarm->time.tm_mon = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) alarm->time.tm_year = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) out_8(®s->alm_min_set, alarm->time.tm_min);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) out_8(®s->alm_hour_set, alarm->time.tm_hour);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) out_8(®s->alm_enable, alarm->enabled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) rtc->wkalarm = *alarm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) static irqreturn_t mpc5121_rtc_handler(int irq, void *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct mpc5121_rtc_data *rtc = dev_get_drvdata((struct device *)dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) if (in_8(®s->int_alm)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) /* acknowledge and clear status */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) out_8(®s->int_alm, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) out_8(®s->alm_status, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) static irqreturn_t mpc5121_rtc_handler_upd(int irq, void *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) struct mpc5121_rtc_data *rtc = dev_get_drvdata((struct device *)dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) if (in_8(®s->int_sec) && (in_8(®s->int_enable) & 0x1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) /* acknowledge */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) out_8(®s->int_sec, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_UF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) static int mpc5121_rtc_alarm_irq_enable(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) unsigned int enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) val = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) out_8(®s->alm_enable, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) rtc->wkalarm.enabled = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) static const struct rtc_class_ops mpc5121_rtc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) .read_time = mpc5121_rtc_read_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) .set_time = mpc5121_rtc_set_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) .read_alarm = mpc5121_rtc_read_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) .set_alarm = mpc5121_rtc_set_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) .alarm_irq_enable = mpc5121_rtc_alarm_irq_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static const struct rtc_class_ops mpc5200_rtc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) .read_time = mpc5200_rtc_read_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) .set_time = mpc5200_rtc_set_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) .read_alarm = mpc5121_rtc_read_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) .set_alarm = mpc5121_rtc_set_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) .alarm_irq_enable = mpc5121_rtc_alarm_irq_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) static int mpc5121_rtc_probe(struct platform_device *op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) struct mpc5121_rtc_data *rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) rtc = devm_kzalloc(&op->dev, sizeof(*rtc), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (!rtc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) rtc->regs = devm_platform_ioremap_resource(op, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (IS_ERR(rtc->regs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) dev_err(&op->dev, "%s: couldn't map io space\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return PTR_ERR(rtc->regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) device_init_wakeup(&op->dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) platform_set_drvdata(op, rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) rtc->irq = irq_of_parse_and_map(op->dev.of_node, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) err = devm_request_irq(&op->dev, rtc->irq, mpc5121_rtc_handler, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) "mpc5121-rtc", &op->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) dev_err(&op->dev, "%s: could not request irq: %i\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) __func__, rtc->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) goto out_dispose;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) rtc->irq_periodic = irq_of_parse_and_map(op->dev.of_node, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) err = devm_request_irq(&op->dev, rtc->irq_periodic,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) mpc5121_rtc_handler_upd, 0, "mpc5121-rtc_upd",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) &op->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) dev_err(&op->dev, "%s: could not request irq: %i\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) __func__, rtc->irq_periodic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) goto out_dispose2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) rtc->rtc = devm_rtc_allocate_device(&op->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) if (IS_ERR(rtc->rtc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) err = PTR_ERR(rtc->rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) goto out_dispose2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) rtc->rtc->ops = &mpc5200_rtc_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) rtc->rtc->uie_unsupported = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) rtc->rtc->range_min = RTC_TIMESTAMP_BEGIN_0000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) rtc->rtc->range_max = 65733206399ULL; /* 4052-12-31 23:59:59 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) if (of_device_is_compatible(op->dev.of_node, "fsl,mpc5121-rtc")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) u32 ka;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) ka = in_be32(&rtc->regs->keep_alive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) if (ka & 0x02) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) dev_warn(&op->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) "mpc5121-rtc: Battery or oscillator failure!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) out_be32(&rtc->regs->keep_alive, ka);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) rtc->rtc->ops = &mpc5121_rtc_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) * This is a limitation of the driver that abuses the target
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) * time register, the actual maximum year for the mpc5121 is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) * also 4052.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) rtc->rtc->range_min = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) rtc->rtc->range_max = U32_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) err = rtc_register_device(rtc->rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) goto out_dispose2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) out_dispose2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) irq_dispose_mapping(rtc->irq_periodic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) out_dispose:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) irq_dispose_mapping(rtc->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) static int mpc5121_rtc_remove(struct platform_device *op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) struct mpc5121_rtc_data *rtc = platform_get_drvdata(op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) struct mpc5121_rtc_regs __iomem *regs = rtc->regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) /* disable interrupt, so there are no nasty surprises */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) out_8(®s->alm_enable, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) out_8(®s->int_enable, in_8(®s->int_enable) & ~0x1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) irq_dispose_mapping(rtc->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) irq_dispose_mapping(rtc->irq_periodic);
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) static const struct of_device_id mpc5121_rtc_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) { .compatible = "fsl,mpc5121-rtc", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) { .compatible = "fsl,mpc5200-rtc", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) MODULE_DEVICE_TABLE(of, mpc5121_rtc_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) static struct platform_driver mpc5121_rtc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) .name = "mpc5121-rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) .of_match_table = of_match_ptr(mpc5121_rtc_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) .probe = mpc5121_rtc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) .remove = mpc5121_rtc_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) module_platform_driver(mpc5121_rtc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) MODULE_AUTHOR("John Rigby <jcrigby@gmail.com>");