@@ -1827,6 +1827,14 @@ config RTC_DRV_BBNSM
This driver can also be built as a module, if so, the module
will be called "rtc-bbnsm".
+config RTC_DRV_IMX_BBM_SCMI
+ depends on IMX_SCMI_BBM_EXT || COMPILE_TEST
+ default y if ARCH_MXC
+ tristate "NXP i.MX BBM SCMI RTC support"
+ help
+ If you say yes here you get support for the NXP i.MX BBSM SCMI
+ RTC module.
+
config RTC_DRV_IMX_SC
depends on IMX_SCU
depends on HAVE_ARM_SMCCC
@@ -74,6 +74,7 @@ obj-$(CONFIG_RTC_DRV_HID_SENSOR_TIME) += rtc-hid-sensor-time.o
obj-$(CONFIG_RTC_DRV_HYM8563) += rtc-hym8563.o
obj-$(CONFIG_RTC_DRV_IMXDI) += rtc-imxdi.o
obj-$(CONFIG_RTC_DRV_IMX_SC) += rtc-imx-sc.o
+obj-$(CONFIG_RTC_DRV_IMX_BBM_SCMI) += rtc-imx-sm-bbm.o
obj-$(CONFIG_RTC_DRV_ISL12022) += rtc-isl12022.o
obj-$(CONFIG_RTC_DRV_ISL12026) += rtc-isl12026.o
obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o
new file mode 100644
@@ -0,0 +1,168 @@
+// 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) {
+ dev_err(dev, "%s: %d\n", __func__, 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;
+ int ret;
+
+ val = rtc_tm_to_time64(tm);
+
+ ret = bbnsm->ops->rtc_time_set(ph, 0, val);
+ if (ret)
+ dev_err(dev, "%s: %d\n", __func__, ret);
+
+ return ret;
+}
+
+static int scmi_imx_bbm_alarm_irq_enable(struct device *dev, unsigned int enable)
+{
+ 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;
+ int ret;
+
+ val = rtc_tm_to_time64(alrm_tm);
+
+ ret = bbnsm->ops->rtc_alarm_set(ph, 0, val);
+ if (ret)
+ dev_err(dev, "%s: %d\n", __func__, ret);
+
+ return ret;
+}
+
+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_min = 0;
+ bbnsm->rtc_dev->range_max = U32_MAX;
+
+ ret = devm_rtc_register_device(bbnsm->rtc_dev);
+ if (ret)
+ return ret;
+
+ bbnsm->nb.notifier_call = &scmi_imx_bbm_rtc_notifier;
+ return handle->notify_ops->devm_event_notifier_register(sdev, SCMI_PROTOCOL_IMX_BBM,
+ SCMI_EVENT_IMX_BBM_RTC,
+ NULL, &bbnsm->nb);
+}
+
+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");