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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2024 NXP.
*/
#include <linux/jiffies.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/rtc.h>
#include <linux/scmi_protocol.h>
#include <linux/scmi_imx_protocol.h>
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;
bbnsm->rtc_dev->range_max = U32_MAX;
bbnsm->nb.notifier_call = &scmi_imx_bbm_rtc_notifier;
ret = handle->notify_ops->devm_event_notifier_register(sdev, SCMI_PROTOCOL_IMX_BBM,
SCMI_EVENT_IMX_BBM_RTC,
NULL, &bbnsm->nb);
if (ret)
return ret;
return devm_rtc_register_device(bbnsm->rtc_dev);
}
static int scmi_imx_bbm_rtc_probe(struct scmi_device *sdev)
{
const struct scmi_handle *handle = sdev->handle;
struct device *dev = &sdev->dev;
struct scmi_protocol_handle *ph;
struct scmi_imx_bbm *bbnsm;
int ret;
if (!handle)
return -ENODEV;
bbnsm = devm_kzalloc(dev, sizeof(*bbnsm), GFP_KERNEL);
if (!bbnsm)
return -ENOMEM;
bbnsm->ops = handle->devm_protocol_get(sdev, SCMI_PROTOCOL_IMX_BBM, &ph);
if (IS_ERR(bbnsm->ops))
return PTR_ERR(bbnsm->ops);
bbnsm->ph = ph;
device_init_wakeup(dev, true);
dev_set_drvdata(dev, bbnsm);
ret = scmi_imx_bbm_rtc_init(sdev);
if (ret)
device_init_wakeup(dev, false);
return ret;
}
static const struct scmi_device_id scmi_id_table[] = {
{ SCMI_PROTOCOL_IMX_BBM, "imx-bbm-rtc" },
{ },
};
MODULE_DEVICE_TABLE(scmi, scmi_id_table);
static struct scmi_driver scmi_imx_bbm_rtc_driver = {
.name = "scmi-imx-bbm-rtc",
.probe = scmi_imx_bbm_rtc_probe,
.id_table = scmi_id_table,
};
module_scmi_driver(scmi_imx_bbm_rtc_driver);
MODULE_AUTHOR("Peng Fan <peng.fan@nxp.com>");
MODULE_DESCRIPTION("IMX SM BBM RTC driver");
MODULE_LICENSE("GPL");
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