@@ -466,6 +466,17 @@ config KEYBOARD_IMX
To compile this driver as a module, choose M here: the
module will be called imx_keypad.
+config KEYBOARD_IMX_BBM_SCMI
+ tristate "IMX BBM SCMI Key Driver"
+ depends on IMX_SCMI_BBM_EXT || COMPILE_TEST
+ default y if ARCH_MXC
+ help
+ This is the BBM key driver for NXP i.MX SoCs managed through
+ SCMI protocol.
+
+ To compile this driver as a module, choose M here: the
+ module will be called scmi-imx-bbm-key.
+
config KEYBOARD_IMX_SC_KEY
tristate "IMX SCU Key Driver"
depends on IMX_SCU
@@ -31,6 +31,7 @@ obj-$(CONFIG_KEYBOARD_IPAQ_MICRO) += ipaq-micro-keys.o
obj-$(CONFIG_KEYBOARD_IQS62X) += iqs62x-keys.o
obj-$(CONFIG_KEYBOARD_IMX) += imx_keypad.o
obj-$(CONFIG_KEYBOARD_IMX_SC_KEY) += imx_sc_key.o
+obj-$(CONFIG_KEYBOARD_IMX_BBM_SCMI) += imx-sm-bbm-key.o
obj-$(CONFIG_KEYBOARD_HP6XX) += jornada680_kbd.o
obj-$(CONFIG_KEYBOARD_HP7XX) += jornada720_kbd.o
obj-$(CONFIG_KEYBOARD_LKKBD) += lkkbd.o
new file mode 100644
@@ -0,0 +1,225 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2024 NXP.
+ */
+
+#include <linux/input.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+#include <linux/scmi_protocol.h>
+#include <linux/scmi_imx_protocol.h>
+#include <linux/suspend.h>
+
+#define DEBOUNCE_TIME 30
+#define REPEAT_INTERVAL 60
+
+struct scmi_imx_bbm {
+ struct scmi_protocol_handle *ph;
+ const struct scmi_imx_bbm_proto_ops *ops;
+ struct notifier_block nb;
+ int keycode;
+ int keystate; /* 1:pressed */
+ bool suspended;
+ struct delayed_work check_work;
+ struct input_dev *input;
+};
+
+static void scmi_imx_bbm_pwrkey_check_for_events(struct work_struct *work)
+{
+ struct scmi_imx_bbm *bbnsm = container_of(to_delayed_work(work),
+ struct scmi_imx_bbm, check_work);
+ struct scmi_protocol_handle *ph = bbnsm->ph;
+ struct input_dev *input = bbnsm->input;
+ u32 state = 0;
+ int ret;
+
+ ret = bbnsm->ops->button_get(ph, &state);
+ if (ret) {
+ pr_err("%s: %d\n", __func__, ret);
+ return;
+ }
+
+ pr_debug("%s: state: %d, keystate %d\n", __func__, state, bbnsm->keystate);
+
+ /* only report new event if status changed */
+ if (state ^ bbnsm->keystate) {
+ bbnsm->keystate = state;
+ input_event(input, EV_KEY, bbnsm->keycode, state);
+ input_sync(input);
+ pm_relax(bbnsm->input->dev.parent);
+ pr_debug("EV_KEY: %x\n", bbnsm->keycode);
+ }
+
+ /* repeat check if pressed long */
+ if (state)
+ schedule_delayed_work(&bbnsm->check_work, msecs_to_jiffies(REPEAT_INTERVAL));
+}
+
+static int scmi_imx_bbm_pwrkey_event(struct scmi_imx_bbm *bbnsm)
+{
+ struct input_dev *input = bbnsm->input;
+
+ pm_wakeup_event(input->dev.parent, 0);
+
+ schedule_delayed_work(&bbnsm->check_work, msecs_to_jiffies(DEBOUNCE_TIME));
+
+ /*
+ * Directly report key event after resume to make no key press
+ * event is missed.
+ */
+ if (READ_ONCE(bbnsm->suspended)) {
+ bbnsm->keystate = 1;
+ input_event(input, EV_KEY, bbnsm->keycode, 1);
+ input_sync(input);
+ WRITE_ONCE(bbnsm->suspended, false);
+ }
+
+ return 0;
+}
+
+static void scmi_imx_bbm_pwrkey_act(void *pdata)
+{
+ struct scmi_imx_bbm *bbnsm = pdata;
+
+ cancel_delayed_work_sync(&bbnsm->check_work);
+}
+
+static int scmi_imx_bbm_key_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_button) {
+ pr_debug("BBM Button Power key pressed\n");
+ scmi_imx_bbm_pwrkey_event(bbnsm);
+ } else {
+ /* Should never reach here */
+ pr_err("Unexpected BBM event: %s\n", __func__);
+ }
+
+ return 0;
+}
+
+static int scmi_imx_bbm_pwrkey_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);
+ struct input_dev *input;
+ int ret;
+
+ if (device_property_read_u32(dev, "linux,code", &bbnsm->keycode)) {
+ bbnsm->keycode = KEY_POWER;
+ dev_warn(dev, "key code is not specified, using default KEY_POWER\n");
+ }
+
+ INIT_DELAYED_WORK(&bbnsm->check_work, scmi_imx_bbm_pwrkey_check_for_events);
+
+ input = devm_input_allocate_device(dev);
+ if (!input) {
+ dev_err(dev, "failed to allocate the input device for SCMI IMX BBM\n");
+ return -ENOMEM;
+ }
+
+ input->name = dev_name(dev);
+ input->phys = "bbnsm-pwrkey/input0";
+ input->id.bustype = BUS_HOST;
+
+ input_set_capability(input, EV_KEY, bbnsm->keycode);
+
+ ret = devm_add_action_or_reset(dev, scmi_imx_bbm_pwrkey_act, bbnsm);
+ if (ret) {
+ dev_err(dev, "failed to register remove action\n");
+ return ret;
+ }
+
+ bbnsm->input = input;
+
+ bbnsm->nb.notifier_call = &scmi_imx_bbm_key_notifier;
+ ret = handle->notify_ops->devm_event_notifier_register(sdev, SCMI_PROTOCOL_IMX_BBM,
+ SCMI_EVENT_IMX_BBM_BUTTON,
+ NULL, &bbnsm->nb);
+
+ if (ret)
+ dev_err(dev, "Failed to register BBM Button Events %d:", ret);
+
+ ret = input_register_device(input);
+ if (ret) {
+ dev_err(dev, "failed to register input device\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int scmi_imx_bbm_key_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_pwrkey_init(sdev);
+ if (ret)
+ device_init_wakeup(dev, false);
+
+ return ret;
+}
+
+static int __maybe_unused scmi_imx_bbm_key_suspend(struct device *dev)
+{
+ struct scmi_imx_bbm *bbnsm = dev_get_drvdata(dev);
+
+ WRITE_ONCE(bbnsm->suspended, true);
+
+ return 0;
+}
+
+static int __maybe_unused scmi_imx_bbm_key_resume(struct device *dev)
+{
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(scmi_imx_bbm_pm_key_ops, scmi_imx_bbm_key_suspend,
+ scmi_imx_bbm_key_resume);
+
+static const struct scmi_device_id scmi_id_table[] = {
+ { SCMI_PROTOCOL_IMX_BBM, "imx-bbm-key" },
+ { },
+};
+MODULE_DEVICE_TABLE(scmi, scmi_id_table);
+
+static struct scmi_driver scmi_imx_bbm_key_driver = {
+ .driver = {
+ .pm = &scmi_imx_bbm_pm_key_ops,
+ },
+ .name = "scmi-imx-bbm-key",
+ .probe = scmi_imx_bbm_key_probe,
+ .id_table = scmi_id_table,
+};
+module_scmi_driver(scmi_imx_bbm_key_driver);
+
+MODULE_AUTHOR("Peng Fan <peng.fan@nxp.com>");
+MODULE_DESCRIPTION("IMX SM BBM Key driver");
+MODULE_LICENSE("GPL");