^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* NXP PCF50633 RTC Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * (C) 2006-2008 by Openmoko, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Author: Balaji Rao <balajirrao@openmoko.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Broken down from monstrous PCF50633 driver mainly by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Harald Welte, Andy Green and Werner Almesberger
^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/kernel.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/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/device.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) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/rtc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/bcd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/mfd/pcf50633/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define PCF50633_REG_RTCSC 0x59 /* Second */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define PCF50633_REG_RTCMN 0x5a /* Minute */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define PCF50633_REG_RTCHR 0x5b /* Hour */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define PCF50633_REG_RTCWD 0x5c /* Weekday */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define PCF50633_REG_RTCDT 0x5d /* Day */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define PCF50633_REG_RTCMT 0x5e /* Month */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define PCF50633_REG_RTCYR 0x5f /* Year */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define PCF50633_REG_RTCSCA 0x60 /* Alarm Second */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define PCF50633_REG_RTCMNA 0x61 /* Alarm Minute */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define PCF50633_REG_RTCHRA 0x62 /* Alarm Hour */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define PCF50633_REG_RTCWDA 0x63 /* Alarm Weekday */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define PCF50633_REG_RTCDTA 0x64 /* Alarm Day */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define PCF50633_REG_RTCMTA 0x65 /* Alarm Month */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define PCF50633_REG_RTCYRA 0x66 /* Alarm Year */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) enum pcf50633_time_indexes {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) PCF50633_TI_SEC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) PCF50633_TI_MIN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) PCF50633_TI_HOUR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) PCF50633_TI_WKDAY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) PCF50633_TI_DAY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) PCF50633_TI_MONTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) PCF50633_TI_YEAR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) PCF50633_TI_EXTENT /* always last */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct pcf50633_time {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) u_int8_t time[PCF50633_TI_EXTENT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct pcf50633_rtc {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) int alarm_enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) int alarm_pending;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct pcf50633 *pcf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct rtc_device *rtc_dev;
^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 void pcf2rtc_time(struct rtc_time *rtc, struct pcf50633_time *pcf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) rtc->tm_sec = bcd2bin(pcf->time[PCF50633_TI_SEC]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) rtc->tm_min = bcd2bin(pcf->time[PCF50633_TI_MIN]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) rtc->tm_hour = bcd2bin(pcf->time[PCF50633_TI_HOUR]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) rtc->tm_wday = bcd2bin(pcf->time[PCF50633_TI_WKDAY]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) rtc->tm_mday = bcd2bin(pcf->time[PCF50633_TI_DAY]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) rtc->tm_mon = bcd2bin(pcf->time[PCF50633_TI_MONTH]) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) rtc->tm_year = bcd2bin(pcf->time[PCF50633_TI_YEAR]) + 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static void rtc2pcf_time(struct pcf50633_time *pcf, struct rtc_time *rtc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) pcf->time[PCF50633_TI_SEC] = bin2bcd(rtc->tm_sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) pcf->time[PCF50633_TI_MIN] = bin2bcd(rtc->tm_min);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) pcf->time[PCF50633_TI_HOUR] = bin2bcd(rtc->tm_hour);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) pcf->time[PCF50633_TI_WKDAY] = bin2bcd(rtc->tm_wday);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) pcf->time[PCF50633_TI_DAY] = bin2bcd(rtc->tm_mday);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) pcf->time[PCF50633_TI_MONTH] = bin2bcd(rtc->tm_mon + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) pcf->time[PCF50633_TI_YEAR] = bin2bcd(rtc->tm_year % 100);
^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) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) pcf50633_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct pcf50633_rtc *rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) err = pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) err = pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) rtc->alarm_enabled = enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return 0;
^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 pcf50633_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 pcf50633_rtc *rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct pcf50633_time pcf_tm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) ret = pcf50633_read_block(rtc->pcf, PCF50633_REG_RTCSC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) PCF50633_TI_EXTENT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) &pcf_tm.time[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (ret != PCF50633_TI_EXTENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) dev_err(dev, "Failed to read time\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) dev_dbg(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) pcf_tm.time[PCF50633_TI_DAY],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) pcf_tm.time[PCF50633_TI_MONTH],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) pcf_tm.time[PCF50633_TI_YEAR],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) pcf_tm.time[PCF50633_TI_HOUR],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) pcf_tm.time[PCF50633_TI_MIN],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) pcf_tm.time[PCF50633_TI_SEC]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) pcf2rtc_time(tm, &pcf_tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) dev_dbg(dev, "RTC_TIME: %ptRr\n", tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static int pcf50633_rtc_set_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) struct pcf50633_rtc *rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct pcf50633_time pcf_tm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) int alarm_masked, ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) dev_dbg(dev, "RTC_TIME: %ptRr\n", tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) rtc2pcf_time(&pcf_tm, tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) dev_dbg(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) pcf_tm.time[PCF50633_TI_DAY],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) pcf_tm.time[PCF50633_TI_MONTH],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) pcf_tm.time[PCF50633_TI_YEAR],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) pcf_tm.time[PCF50633_TI_HOUR],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) pcf_tm.time[PCF50633_TI_MIN],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) pcf_tm.time[PCF50633_TI_SEC]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) alarm_masked = pcf50633_irq_mask_get(rtc->pcf, PCF50633_IRQ_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (!alarm_masked)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) /* Returns 0 on success */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) ret = pcf50633_write_block(rtc->pcf, PCF50633_REG_RTCSC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) PCF50633_TI_EXTENT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) &pcf_tm.time[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) if (!alarm_masked)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static int pcf50633_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) struct pcf50633_rtc *rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) struct pcf50633_time pcf_tm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) alrm->enabled = rtc->alarm_enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) alrm->pending = rtc->alarm_pending;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) ret = pcf50633_read_block(rtc->pcf, PCF50633_REG_RTCSCA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) PCF50633_TI_EXTENT, &pcf_tm.time[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (ret != PCF50633_TI_EXTENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) dev_err(dev, "Failed to read time\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) pcf2rtc_time(&alrm->time, &pcf_tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return rtc_valid_tm(&alrm->time);
^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) static int pcf50633_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) struct pcf50633_rtc *rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) struct pcf50633_time pcf_tm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) int alarm_masked, ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) rtc = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) rtc2pcf_time(&pcf_tm, &alrm->time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) /* do like mktime does and ignore tm_wday */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) pcf_tm.time[PCF50633_TI_WKDAY] = 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) alarm_masked = pcf50633_irq_mask_get(rtc->pcf, PCF50633_IRQ_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) /* disable alarm interrupt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (!alarm_masked)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /* Returns 0 on success */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) ret = pcf50633_write_block(rtc->pcf, PCF50633_REG_RTCSCA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) PCF50633_TI_EXTENT, &pcf_tm.time[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) if (!alrm->enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) rtc->alarm_pending = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (!alarm_masked || alrm->enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) rtc->alarm_enabled = alrm->enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) return ret;
^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) static const struct rtc_class_ops pcf50633_rtc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) .read_time = pcf50633_rtc_read_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) .set_time = pcf50633_rtc_set_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) .read_alarm = pcf50633_rtc_read_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) .set_alarm = pcf50633_rtc_set_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) .alarm_irq_enable = pcf50633_rtc_alarm_irq_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static void pcf50633_rtc_irq(int irq, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) struct pcf50633_rtc *rtc = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) rtc->alarm_pending = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) static int pcf50633_rtc_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) struct pcf50633_rtc *rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (!rtc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) rtc->pcf = dev_to_pcf50633(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) platform_set_drvdata(pdev, rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, "pcf50633-rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) &pcf50633_rtc_ops, THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (IS_ERR(rtc->rtc_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return PTR_ERR(rtc->rtc_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) pcf50633_register_irq(rtc->pcf, PCF50633_IRQ_ALARM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) pcf50633_rtc_irq, rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) static int pcf50633_rtc_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) struct pcf50633_rtc *rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) rtc = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) pcf50633_free_irq(rtc->pcf, PCF50633_IRQ_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) return 0;
^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 struct platform_driver pcf50633_rtc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) .name = "pcf50633-rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) .probe = pcf50633_rtc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) .remove = pcf50633_rtc_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) module_platform_driver(pcf50633_rtc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) MODULE_DESCRIPTION("PCF50633 RTC driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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