^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^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 Freescale MC13XXX PMIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * (C) 2009 Sascha Hauer, Pengutronix
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * (C) 2009 Uwe Kleine-Koenig, Pengutronix
^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/mfd/mc13xxx.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mod_devicetable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/rtc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define DRIVER_NAME "mc13xxx-rtc"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define MC13XXX_RTCTOD 20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define MC13XXX_RTCTODA 21
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define MC13XXX_RTCDAY 22
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define MC13XXX_RTCDAYA 23
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define SEC_PER_DAY (24 * 60 * 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct mc13xxx_rtc {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct rtc_device *rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct mc13xxx *mc13xxx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) int valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static int mc13xxx_rtc_irq_enable_unlocked(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) unsigned int enabled, int irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) int (*func)(struct mc13xxx *mc13xxx, int irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) if (!priv->valid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) return -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) func = enabled ? mc13xxx_irq_unmask : mc13xxx_irq_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return func(priv->mc13xxx, irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static int mc13xxx_rtc_alarm_irq_enable(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) unsigned int enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) mc13xxx_lock(priv->mc13xxx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) ret = mc13xxx_rtc_irq_enable_unlocked(dev, enabled, MC13XXX_IRQ_TODA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) mc13xxx_unlock(priv->mc13xxx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int mc13xxx_rtc_read_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) unsigned int seconds, days1, days2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (!priv->valid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTOD, &seconds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) } while (days1 != days2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) rtc_time64_to_tm((time64_t)days1 * SEC_PER_DAY + seconds, tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static int mc13xxx_rtc_set_time(struct device *dev, struct rtc_time *tm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) unsigned int seconds, days;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) unsigned int alarmseconds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) days = div_s64_rem(rtc_tm_to_time64(tm), SEC_PER_DAY, &seconds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) mc13xxx_lock(priv->mc13xxx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * temporarily invalidate alarm to prevent triggering it when the day is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * already updated while the time isn't yet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &alarmseconds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (alarmseconds < SEC_PER_DAY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) ret = mc13xxx_reg_write(priv->mc13xxx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) MC13XXX_RTCTODA, 0x1ffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * write seconds=0 to prevent a day switch between writing days
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * and seconds below
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAY, days);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, seconds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /* restore alarm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (alarmseconds < SEC_PER_DAY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) ret = mc13xxx_reg_write(priv->mc13xxx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) MC13XXX_RTCTODA, alarmseconds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) goto out;
^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) if (!priv->valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) ret = mc13xxx_irq_unmask(priv->mc13xxx, MC13XXX_IRQ_RTCRST);
^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) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) priv->valid = !ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) mc13xxx_unlock(priv->mc13xxx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return ret;
^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) static int mc13xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) unsigned int seconds, days;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) time64_t s1970;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) int enabled, pending;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) mc13xxx_lock(priv->mc13xxx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTODA, &seconds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (seconds >= SEC_PER_DAY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) ret = -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) goto out;
^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) ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCDAY, &days);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) ret = mc13xxx_irq_status(priv->mc13xxx, MC13XXX_IRQ_TODA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) &enabled, &pending);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) mc13xxx_unlock(priv->mc13xxx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) alarm->enabled = enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) alarm->pending = pending;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) s1970 = (time64_t)days * SEC_PER_DAY + seconds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) rtc_time64_to_tm(s1970, &alarm->time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) dev_dbg(dev, "%s: %lld\n", __func__, (long long)s1970);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static int mc13xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) time64_t s1970;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) u32 seconds, days;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) mc13xxx_lock(priv->mc13xxx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) /* disable alarm to prevent false triggering */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, 0x1ffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) ret = mc13xxx_irq_ack(priv->mc13xxx, MC13XXX_IRQ_TODA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) s1970 = rtc_tm_to_time64(&alarm->time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) dev_dbg(dev, "%s: %s %lld\n", __func__, alarm->enabled ? "on" : "off",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) (long long)s1970);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) ret = mc13xxx_rtc_irq_enable_unlocked(dev, alarm->enabled,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) MC13XXX_IRQ_TODA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) days = div_s64_rem(s1970, SEC_PER_DAY, &seconds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCDAYA, days);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTODA, seconds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) mc13xxx_unlock(priv->mc13xxx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static irqreturn_t mc13xxx_rtc_alarm_handler(int irq, void *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) struct mc13xxx_rtc *priv = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct mc13xxx *mc13xxx = priv->mc13xxx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) rtc_update_irq(priv->rtc, 1, RTC_IRQF | RTC_AF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) mc13xxx_irq_ack(mc13xxx, irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) static const struct rtc_class_ops mc13xxx_rtc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) .read_time = mc13xxx_rtc_read_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) .set_time = mc13xxx_rtc_set_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) .read_alarm = mc13xxx_rtc_read_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) .set_alarm = mc13xxx_rtc_set_alarm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) .alarm_irq_enable = mc13xxx_rtc_alarm_irq_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) static irqreturn_t mc13xxx_rtc_reset_handler(int irq, void *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) struct mc13xxx_rtc *priv = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) struct mc13xxx *mc13xxx = priv->mc13xxx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) priv->valid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) mc13xxx_irq_mask(mc13xxx, irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) static int __init mc13xxx_rtc_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) struct mc13xxx_rtc *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) struct mc13xxx *mc13xxx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) mc13xxx = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) priv->mc13xxx = mc13xxx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) priv->valid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) priv->rtc = devm_rtc_allocate_device(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if (IS_ERR(priv->rtc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) return PTR_ERR(priv->rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) platform_set_drvdata(pdev, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) priv->rtc->ops = &mc13xxx_rtc_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) /* 15bit days + hours, minutes, seconds */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) priv->rtc->range_max = (timeu64_t)(1 << 15) * SEC_PER_DAY - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) mc13xxx_lock(mc13xxx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) mc13xxx_irq_ack(mc13xxx, MC13XXX_IRQ_RTCRST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) ret = mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_RTCRST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) mc13xxx_rtc_reset_handler, DRIVER_NAME, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) goto err_irq_request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) ret = mc13xxx_irq_request_nounmask(mc13xxx, MC13XXX_IRQ_TODA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) mc13xxx_rtc_alarm_handler, DRIVER_NAME, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) goto err_irq_request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) mc13xxx_unlock(mc13xxx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) ret = rtc_register_device(priv->rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) mc13xxx_lock(mc13xxx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) goto err_irq_request;
^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) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) err_irq_request:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_TODA, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_RTCRST, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) mc13xxx_unlock(mc13xxx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) static int mc13xxx_rtc_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) struct mc13xxx_rtc *priv = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) mc13xxx_lock(priv->mc13xxx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TODA, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_RTCRST, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) mc13xxx_unlock(priv->mc13xxx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static const struct platform_device_id mc13xxx_rtc_idtable[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) .name = "mc13783-rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) .name = "mc13892-rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) .name = "mc34708-rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) { /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) MODULE_DEVICE_TABLE(platform, mc13xxx_rtc_idtable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) static struct platform_driver mc13xxx_rtc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) .id_table = mc13xxx_rtc_idtable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) .remove = mc13xxx_rtc_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) .name = DRIVER_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) module_platform_driver_probe(mc13xxx_rtc_driver, &mc13xxx_rtc_probe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) MODULE_DESCRIPTION("RTC driver for Freescale MC13XXX PMIC");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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