rtc: pcf85363: add alarm support
Handle alarms, currently only on INTA Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni
parent
c57849dde0
commit
e5aac267a1
@ -73,6 +73,39 @@
|
||||
#define CTRL_RESETS 0x2f
|
||||
#define CTRL_RAM 0x40
|
||||
|
||||
#define ALRM_SEC_A1E BIT(0)
|
||||
#define ALRM_MIN_A1E BIT(1)
|
||||
#define ALRM_HR_A1E BIT(2)
|
||||
#define ALRM_DAY_A1E BIT(3)
|
||||
#define ALRM_MON_A1E BIT(4)
|
||||
#define ALRM_MIN_A2E BIT(5)
|
||||
#define ALRM_HR_A2E BIT(6)
|
||||
#define ALRM_DAY_A2E BIT(7)
|
||||
|
||||
#define INT_WDIE BIT(0)
|
||||
#define INT_BSIE BIT(1)
|
||||
#define INT_TSRIE BIT(2)
|
||||
#define INT_A2IE BIT(3)
|
||||
#define INT_A1IE BIT(4)
|
||||
#define INT_OIE BIT(5)
|
||||
#define INT_PIE BIT(6)
|
||||
#define INT_ILP BIT(7)
|
||||
|
||||
#define FLAGS_TSR1F BIT(0)
|
||||
#define FLAGS_TSR2F BIT(1)
|
||||
#define FLAGS_TSR3F BIT(2)
|
||||
#define FLAGS_BSF BIT(3)
|
||||
#define FLAGS_WDF BIT(4)
|
||||
#define FLAGS_A1F BIT(5)
|
||||
#define FLAGS_A2F BIT(6)
|
||||
#define FLAGS_PIF BIT(7)
|
||||
|
||||
#define PIN_IO_INTAPM GENMASK(1, 0)
|
||||
#define PIN_IO_INTA_CLK 0
|
||||
#define PIN_IO_INTA_BAT 1
|
||||
#define PIN_IO_INTA_OUT 2
|
||||
#define PIN_IO_INTA_HIZ 3
|
||||
|
||||
#define NVRAM_SIZE 0x40
|
||||
|
||||
static struct i2c_driver pcf85363_driver;
|
||||
@ -131,11 +164,123 @@ static int pcf85363_rtc_set_time(struct device *dev, struct rtc_time *tm)
|
||||
buf, len);
|
||||
}
|
||||
|
||||
static int pcf85363_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
|
||||
{
|
||||
struct pcf85363 *pcf85363 = dev_get_drvdata(dev);
|
||||
unsigned char buf[DT_MONTH_ALM1 - DT_SECOND_ALM1 + 1];
|
||||
unsigned int val;
|
||||
int ret;
|
||||
|
||||
ret = regmap_bulk_read(pcf85363->regmap, DT_SECOND_ALM1, 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]);
|
||||
alrm->time.tm_mon = bcd2bin(buf[4]) - 1;
|
||||
|
||||
ret = regmap_read(pcf85363->regmap, CTRL_INTA_EN, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
alrm->enabled = !!(val & INT_A1IE);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int _pcf85363_rtc_alarm_irq_enable(struct pcf85363 *pcf85363, unsigned
|
||||
int enabled)
|
||||
{
|
||||
unsigned int alarm_flags = ALRM_SEC_A1E | ALRM_MIN_A1E | ALRM_HR_A1E |
|
||||
ALRM_DAY_A1E | ALRM_MON_A1E;
|
||||
int ret;
|
||||
|
||||
ret = regmap_update_bits(pcf85363->regmap, DT_ALARM_EN, alarm_flags,
|
||||
enabled ? alarm_flags : 0);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = regmap_update_bits(pcf85363->regmap, CTRL_INTA_EN,
|
||||
INT_A1IE, enabled ? INT_A1IE : 0);
|
||||
|
||||
if (ret || enabled)
|
||||
return ret;
|
||||
|
||||
/* clear current flags */
|
||||
return regmap_update_bits(pcf85363->regmap, CTRL_FLAGS, FLAGS_A1F, 0);
|
||||
}
|
||||
|
||||
static int pcf85363_rtc_alarm_irq_enable(struct device *dev,
|
||||
unsigned int enabled)
|
||||
{
|
||||
struct pcf85363 *pcf85363 = dev_get_drvdata(dev);
|
||||
|
||||
return _pcf85363_rtc_alarm_irq_enable(pcf85363, enabled);
|
||||
}
|
||||
|
||||
static int pcf85363_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
|
||||
{
|
||||
struct pcf85363 *pcf85363 = dev_get_drvdata(dev);
|
||||
unsigned char buf[DT_MONTH_ALM1 - DT_SECOND_ALM1 + 1];
|
||||
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] = bin2bcd(alrm->time.tm_mon + 1);
|
||||
|
||||
/*
|
||||
* Disable the alarm interrupt before changing the value to avoid
|
||||
* spurious interrupts
|
||||
*/
|
||||
ret = _pcf85363_rtc_alarm_irq_enable(pcf85363, 0);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = regmap_bulk_write(pcf85363->regmap, DT_SECOND_ALM1, buf,
|
||||
sizeof(buf));
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
return _pcf85363_rtc_alarm_irq_enable(pcf85363, alrm->enabled);
|
||||
}
|
||||
|
||||
static irqreturn_t pcf85363_rtc_handle_irq(int irq, void *dev_id)
|
||||
{
|
||||
struct pcf85363 *pcf85363 = i2c_get_clientdata(dev_id);
|
||||
unsigned int flags;
|
||||
int err;
|
||||
|
||||
err = regmap_read(pcf85363->regmap, CTRL_FLAGS, &flags);
|
||||
if (err)
|
||||
return IRQ_NONE;
|
||||
|
||||
if (flags & FLAGS_A1F) {
|
||||
rtc_update_irq(pcf85363->rtc, 1, RTC_IRQF | RTC_AF);
|
||||
regmap_update_bits(pcf85363->regmap, CTRL_FLAGS, FLAGS_A1F, 0);
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
return IRQ_NONE;
|
||||
}
|
||||
|
||||
static const struct rtc_class_ops rtc_ops = {
|
||||
.read_time = pcf85363_rtc_read_time,
|
||||
.set_time = pcf85363_rtc_set_time,
|
||||
};
|
||||
|
||||
static const struct rtc_class_ops rtc_ops_alarm = {
|
||||
.read_time = pcf85363_rtc_read_time,
|
||||
.set_time = pcf85363_rtc_set_time,
|
||||
.read_alarm = pcf85363_rtc_read_alarm,
|
||||
.set_alarm = pcf85363_rtc_set_alarm,
|
||||
.alarm_irq_enable = pcf85363_rtc_alarm_irq_enable,
|
||||
};
|
||||
|
||||
static int pcf85363_nvram_read(void *priv, unsigned int offset, void *val,
|
||||
size_t bytes)
|
||||
{
|
||||
@ -197,6 +342,20 @@ static int pcf85363_probe(struct i2c_client *client,
|
||||
|
||||
pcf85363->rtc->ops = &rtc_ops;
|
||||
|
||||
if (client->irq > 0) {
|
||||
regmap_write(pcf85363->regmap, CTRL_FLAGS, 0);
|
||||
regmap_update_bits(pcf85363->regmap, CTRL_PIN_IO,
|
||||
PIN_IO_INTA_OUT, PIN_IO_INTAPM);
|
||||
ret = devm_request_threaded_irq(pcf85363->dev, client->irq,
|
||||
NULL, pcf85363_rtc_handle_irq,
|
||||
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
|
||||
"pcf85363", client);
|
||||
if (ret)
|
||||
dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n");
|
||||
else
|
||||
pcf85363->rtc->ops = &rtc_ops_alarm;
|
||||
}
|
||||
|
||||
ret = rtc_register_device(pcf85363->rtc);
|
||||
|
||||
nvmem_cfg.priv = pcf85363;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user