drivers/rtc/rtc-imx-sm-bbm.c

Source file repositories/reference/linux-study-clean/drivers/rtc/rtc-imx-sm-bbm.c

File Facts

System
Linux kernel
Corpus path
drivers/rtc/rtc-imx-sm-bbm.c
Extension
.c
Size
4034 bytes
Lines
163
Domain
Driver Families
Bucket
drivers/rtc
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct scmi_imx_bbm {
	const struct scmi_imx_bbm_proto_ops *ops;
	struct rtc_device *rtc_dev;
	struct scmi_protocol_handle *ph;
	struct notifier_block nb;
};

static int scmi_imx_bbm_read_time(struct device *dev, struct rtc_time *tm)
{
	struct scmi_imx_bbm *bbnsm = dev_get_drvdata(dev);
	struct scmi_protocol_handle *ph = bbnsm->ph;
	u64 val;
	int ret;

	ret = bbnsm->ops->rtc_time_get(ph, 0, &val);
	if (ret)
		return ret;

	rtc_time64_to_tm(val, tm);

	return 0;
}

static int scmi_imx_bbm_set_time(struct device *dev, struct rtc_time *tm)
{
	struct scmi_imx_bbm *bbnsm = dev_get_drvdata(dev);
	struct scmi_protocol_handle *ph = bbnsm->ph;
	u64 val;

	val = rtc_tm_to_time64(tm);

	return bbnsm->ops->rtc_time_set(ph, 0, val);
}

static int scmi_imx_bbm_alarm_irq_enable(struct device *dev, unsigned int enable)
{
	struct scmi_imx_bbm *bbnsm = dev_get_drvdata(dev);
	struct scmi_protocol_handle *ph = bbnsm->ph;

	/* scmi_imx_bbm_set_alarm enables the irq, just handle disable here */
	if (!enable)
		return bbnsm->ops->rtc_alarm_set(ph, 0, false, 0);

	return 0;
}

static int scmi_imx_bbm_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	struct scmi_imx_bbm *bbnsm = dev_get_drvdata(dev);
	struct scmi_protocol_handle *ph = bbnsm->ph;
	struct rtc_time *alrm_tm = &alrm->time;
	u64 val;

	val = rtc_tm_to_time64(alrm_tm);

	return bbnsm->ops->rtc_alarm_set(ph, 0, true, val);
}

static const struct rtc_class_ops smci_imx_bbm_rtc_ops = {
	.read_time = scmi_imx_bbm_read_time,
	.set_time = scmi_imx_bbm_set_time,
	.set_alarm = scmi_imx_bbm_set_alarm,
	.alarm_irq_enable = scmi_imx_bbm_alarm_irq_enable,
};

static int scmi_imx_bbm_rtc_notifier(struct notifier_block *nb, unsigned long event, void *data)
{
	struct scmi_imx_bbm *bbnsm = container_of(nb, struct scmi_imx_bbm, nb);
	struct scmi_imx_bbm_notif_report *r = data;

	if (r->is_rtc)
		rtc_update_irq(bbnsm->rtc_dev, 1, RTC_AF | RTC_IRQF);
	else
		pr_err("Unexpected bbm event: %s\n", __func__);

	return 0;
}

static int scmi_imx_bbm_rtc_init(struct scmi_device *sdev)
{
	const struct scmi_handle *handle = sdev->handle;
	struct device *dev = &sdev->dev;
	struct scmi_imx_bbm *bbnsm = dev_get_drvdata(dev);
	int ret;

	bbnsm->rtc_dev = devm_rtc_allocate_device(dev);
	if (IS_ERR(bbnsm->rtc_dev))
		return PTR_ERR(bbnsm->rtc_dev);

	bbnsm->rtc_dev->ops = &smci_imx_bbm_rtc_ops;

Annotation

Implementation Notes