diff options
Diffstat (limited to 'drivers/rtc/rtc-rv3029c2.c')
| -rw-r--r-- | drivers/rtc/rtc-rv3029c2.c | 114 |
1 files changed, 93 insertions, 21 deletions
diff --git a/drivers/rtc/rtc-rv3029c2.c b/drivers/rtc/rtc-rv3029c2.c index 916bbc2f57de..c2ef64fb4757 100644 --- a/drivers/rtc/rtc-rv3029c2.c +++ b/drivers/rtc/rtc-rv3029c2.c @@ -329,6 +329,47 @@ static int rv3029_eeprom_update_bits(struct device *dev, return 0; } +static irqreturn_t rv3029_handle_irq(int irq, void *dev_id) +{ + struct device *dev = dev_id; + struct rv3029_data *rv3029 = dev_get_drvdata(dev); + struct mutex *lock = &rv3029->rtc->ops_lock; + unsigned long events = 0; + u8 flags, controls; + int ret; + + mutex_lock(lock); + + ret = rv3029_read_regs(dev, RV3029_IRQ_CTRL, &controls, 1); + if (ret) { + dev_warn(dev, "Read IRQ Control Register error %d\n", ret); + mutex_unlock(lock); + return IRQ_NONE; + } + + ret = rv3029_read_regs(dev, RV3029_IRQ_FLAGS, &flags, 1); + if (ret) { + dev_warn(dev, "Read IRQ Flags Register error %d\n", ret); + mutex_unlock(lock); + return IRQ_NONE; + } + + if (flags & RV3029_IRQ_FLAGS_AF) { + flags &= ~RV3029_IRQ_FLAGS_AF; + controls &= ~RV3029_IRQ_CTRL_AIE; + events |= RTC_AF; + } + + if (events) { + rtc_update_irq(rv3029->rtc, 1, events); + rv3029_write_regs(dev, RV3029_IRQ_FLAGS, &flags, 1); + rv3029_write_regs(dev, RV3029_IRQ_CTRL, &controls, 1); + } + mutex_unlock(lock); + + return IRQ_HANDLED; +} + static int rv3029_read_time(struct device *dev, struct rtc_time *tm) { u8 buf[1]; @@ -376,7 +417,7 @@ static int rv3029_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) { struct rtc_time *const tm = &alarm->time; int ret; - u8 regs[8]; + u8 regs[8], controls, flags; ret = rv3029_get_sr(dev, regs); if (ret < 0) { @@ -392,6 +433,17 @@ static int rv3029_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) return ret; } + ret = rv3029_read_regs(dev, RV3029_IRQ_CTRL, &controls, 1); + if (ret) { + dev_err(dev, "Read IRQ Control Register error %d\n", ret); + return ret; + } + ret = rv3029_read_regs(dev, RV3029_IRQ_FLAGS, &flags, 1); + if (ret < 0) { + dev_err(dev, "Read IRQ Flags Register error %d\n", ret); + return ret; + } + tm->tm_sec = bcd2bin(regs[RV3029_A_SC - RV3029_A_SC] & 0x7f); tm->tm_min = bcd2bin(regs[RV3029_A_MN - RV3029_A_SC] & 0x7f); tm->tm_hour = bcd2bin(regs[RV3029_A_HR - RV3029_A_SC] & 0x3f); @@ -400,16 +452,30 @@ static int rv3029_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) tm->tm_year = bcd2bin(regs[RV3029_A_YR - RV3029_A_SC] & 0x7f) + 100; tm->tm_wday = bcd2bin(regs[RV3029_A_DW - RV3029_A_SC] & 0x07) - 1; + alarm->enabled = !!(controls & RV3029_IRQ_CTRL_AIE); + alarm->pending = (flags & RV3029_IRQ_FLAGS_AF) && alarm->enabled; + return 0; } -static int rv3029_rtc_alarm_set_irq(struct device *dev, int enable) +static int rv3029_alarm_irq_enable(struct device *dev, unsigned int enable) { int ret; + u8 controls; + + ret = rv3029_read_regs(dev, RV3029_IRQ_CTRL, &controls, 1); + if (ret < 0) { + dev_warn(dev, "Read IRQ Control Register error %d\n", ret); + return ret; + } /* enable/disable AIE irq */ - ret = rv3029_update_bits(dev, RV3029_IRQ_CTRL, RV3029_IRQ_CTRL_AIE, - (enable ? RV3029_IRQ_CTRL_AIE : 0)); + if (enable) + controls |= RV3029_IRQ_CTRL_AIE; + else + controls &= ~RV3029_IRQ_CTRL_AIE; + + ret = rv3029_write_regs(dev, RV3029_IRQ_CTRL, &controls, 1); if (ret < 0) { dev_err(dev, "can't update INT reg\n"); return ret; @@ -459,26 +525,15 @@ static int rv3029_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) return ret; if (alarm->enabled) { - /* clear AF flag */ - ret = rv3029_update_bits(dev, RV3029_IRQ_FLAGS, - RV3029_IRQ_FLAGS_AF, 0); - if (ret < 0) { - dev_err(dev, "can't clear alarm flag\n"); - return ret; - } /* enable AIE irq */ - ret = rv3029_rtc_alarm_set_irq(dev, 1); + ret = rv3029_alarm_irq_enable(dev, 1); if (ret) return ret; - - dev_dbg(dev, "alarm IRQ armed\n"); } else { /* disable AIE irq */ - ret = rv3029_rtc_alarm_set_irq(dev, 0); + ret = rv3029_alarm_irq_enable(dev, 0); if (ret) return ret; - - dev_dbg(dev, "alarm IRQ disabled\n"); } return 0; @@ -731,11 +786,9 @@ static void rv3029_hwmon_register(struct device *dev, const char *name) #endif /* CONFIG_RTC_DRV_RV3029_HWMON */ -static const struct rtc_class_ops rv3029_rtc_ops = { +static struct rtc_class_ops rv3029_rtc_ops = { .read_time = rv3029_read_time, .set_time = rv3029_set_time, - .read_alarm = rv3029_read_alarm, - .set_alarm = rv3029_set_alarm, }; static struct i2c_device_id rv3029_id[] = { @@ -772,8 +825,27 @@ static int rv3029_probe(struct device *dev, struct regmap *regmap, int irq, rv3029->rtc = devm_rtc_device_register(dev, name, &rv3029_rtc_ops, THIS_MODULE); + if (IS_ERR(rv3029->rtc)) { + dev_err(dev, "unable to register the class device\n"); + return PTR_ERR(rv3029->rtc); + } - return PTR_ERR_OR_ZERO(rv3029->rtc); + if (rv3029->irq > 0) { + rc = devm_request_threaded_irq(dev, rv3029->irq, + NULL, rv3029_handle_irq, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + "rv3029", dev); + if (rc) { + dev_warn(dev, "unable to request IRQ, alarms disabled\n"); + rv3029->irq = 0; + } else { + rv3029_rtc_ops.read_alarm = rv3029_read_alarm; + rv3029_rtc_ops.set_alarm = rv3029_set_alarm; + rv3029_rtc_ops.alarm_irq_enable = rv3029_alarm_irq_enable; + } + } + + return 0; } #if IS_ENABLED(CONFIG_I2C) |