diff --git a/drivers/rtc/rtc-pcf85063.c b/drivers/rtc/rtc-pcf85063.c index cba60e7031c3..2131c55316f6 100644 --- a/drivers/rtc/rtc-pcf85063.c +++ b/drivers/rtc/rtc-pcf85063.c @@ -11,6 +11,7 @@ #include #include #include +#include #include /* @@ -27,11 +28,19 @@ #define PCF85063_REG_CTRL1_CAP_SEL BIT(0) #define PCF85063_REG_CTRL1_STOP BIT(5) +#define PCF85063_REG_CTRL2 0x01 +#define PCF85063_CTRL2_AF BIT(6) +#define PCF85063_CTRL2_AIE BIT(7) + #define PCF85063_REG_SC 0x04 /* datetime */ #define PCF85063_REG_SC_OS 0x80 +#define PCF85063_REG_ALM_S 0x0b +#define PCF85063_AEN BIT(7) + struct pcf85063_config { struct regmap_config regmap; + unsigned has_alarms:1; }; struct pcf85063 { @@ -123,11 +132,103 @@ static int pcf85063_rtc_set_time(struct device *dev, struct rtc_time *tm) PCF85063_REG_CTRL1_STOP, 0); } +static int pcf85063_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct pcf85063 *pcf85063 = dev_get_drvdata(dev); + u8 buf[4]; + unsigned int val; + int ret; + + ret = regmap_bulk_read(pcf85063->regmap, PCF85063_REG_ALM_S, + buf, sizeof(buf)); + if (ret) + return ret; + + alrm->time.tm_sec = bcd2bin(buf[0]); + alrm->time.tm_min = bcd2bin(buf[1]); + alrm->time.tm_hour = bcd2bin(buf[2]); + alrm->time.tm_mday = bcd2bin(buf[3]); + + ret = regmap_read(pcf85063->regmap, PCF85063_REG_CTRL2, &val); + if (ret) + return ret; + + alrm->enabled = !!(val & PCF85063_CTRL2_AIE); + + return 0; +} + +static int pcf85063_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct pcf85063 *pcf85063 = dev_get_drvdata(dev); + u8 buf[5]; + int ret; + + buf[0] = bin2bcd(alrm->time.tm_sec); + buf[1] = bin2bcd(alrm->time.tm_min); + buf[2] = bin2bcd(alrm->time.tm_hour); + buf[3] = bin2bcd(alrm->time.tm_mday); + buf[4] = PCF85063_AEN; /* Do not match on week day */ + + ret = regmap_update_bits(pcf85063->regmap, PCF85063_REG_CTRL2, + PCF85063_CTRL2_AIE | PCF85063_CTRL2_AF, 0); + if (ret) + return ret; + + ret = regmap_bulk_write(pcf85063->regmap, PCF85063_REG_ALM_S, + buf, sizeof(buf)); + if (ret) + return ret; + + return regmap_update_bits(pcf85063->regmap, PCF85063_REG_CTRL2, + PCF85063_CTRL2_AIE | PCF85063_CTRL2_AF, + alrm->enabled ? PCF85063_CTRL2_AIE | PCF85063_CTRL2_AF : PCF85063_CTRL2_AF); +} + +static int pcf85063_rtc_alarm_irq_enable(struct device *dev, + unsigned int enabled) +{ + struct pcf85063 *pcf85063 = dev_get_drvdata(dev); + + return regmap_update_bits(pcf85063->regmap, PCF85063_REG_CTRL2, + PCF85063_CTRL2_AIE, + enabled ? PCF85063_CTRL2_AIE : 0); +} + +static irqreturn_t pcf85063_rtc_handle_irq(int irq, void *dev_id) +{ + struct pcf85063 *pcf85063 = dev_id; + unsigned int val; + int err; + + err = regmap_read(pcf85063->regmap, PCF85063_REG_CTRL2, &val); + if (err) + return IRQ_NONE; + + if (val & PCF85063_CTRL2_AF) { + rtc_update_irq(pcf85063->rtc, 1, RTC_IRQF | RTC_AF); + regmap_update_bits(pcf85063->regmap, PCF85063_REG_CTRL2, + PCF85063_CTRL2_AIE | PCF85063_CTRL2_AF, + 0); + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + static const struct rtc_class_ops pcf85063_rtc_ops = { .read_time = pcf85063_rtc_read_time, .set_time = pcf85063_rtc_set_time }; +static const struct rtc_class_ops pcf85063_rtc_ops_alarm = { + .read_time = pcf85063_rtc_read_time, + .set_time = pcf85063_rtc_set_time, + .read_alarm = pcf85063_rtc_read_alarm, + .set_alarm = pcf85063_rtc_set_alarm, + .alarm_irq_enable = pcf85063_rtc_alarm_irq_enable, +}; + static int pcf85063_load_capacitance(struct pcf85063 *pcf85063, const struct device_node *np) { @@ -157,6 +258,7 @@ static const struct pcf85063_config pcf85063a_config = { .val_bits = 8, .max_register = 0x11, }, + .has_alarms = 1, }; static const struct pcf85063_config pcf85063tp_config = { @@ -209,6 +311,25 @@ static int pcf85063_probe(struct i2c_client *client) pcf85063->rtc->ops = &pcf85063_rtc_ops; pcf85063->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000; pcf85063->rtc->range_max = RTC_TIMESTAMP_END_2099; + pcf85063->rtc->uie_unsupported = 1; + + if (config->has_alarms && client->irq > 0) { + err = devm_request_threaded_irq(&client->dev, client->irq, + NULL, pcf85063_rtc_handle_irq, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + "pcf85063", pcf85063); + if (err) { + dev_warn(&pcf85063->rtc->dev, + "unable to request IRQ, alarms disabled\n"); + } else { + pcf85063->rtc->ops = &pcf85063_rtc_ops_alarm; + device_init_wakeup(&client->dev, true); + err = dev_pm_set_wake_irq(&client->dev, client->irq); + if (err) + dev_err(&pcf85063->rtc->dev, + "failed to enable irq wake\n"); + } + } return rtc_register_device(pcf85063->rtc); }