1 // SPDX-License-Identifier: GPL-2.0
8 #include <linux/firmware/imx/sci.h>
50 		schedule_delayed_work(&priv->check_work,  in imx_sc_key_notify()
52 		pm_wakeup_event(priv->input->dev.parent, 0);  in imx_sc_key_notify()
64 	struct input_dev *input = priv->input;  in imx_sc_check_for_events()
70 	hdr->ver = IMX_SC_RPC_VERSION;  in imx_sc_check_for_events()
71 	hdr->svc = IMX_SC_RPC_SVC_MISC;  in imx_sc_check_for_events()
72 	hdr->func = IMX_SC_MISC_FUNC_GET_BUTTON_STATUS;  in imx_sc_check_for_events()
73 	hdr->size = 1;  in imx_sc_check_for_events()
75 	error = imx_scu_call_rpc(priv->key_ipc_handle, &msg, true);  in imx_sc_check_for_events()
77 		dev_err(&input->dev, "read imx sc key failed, error %d\n", error);  in imx_sc_check_for_events()
83 	 * but ONLY the first byte is the key state, other  in imx_sc_check_for_events()
85 	 * ONLY take the first byte as key state.  in imx_sc_check_for_events()
89 	if (state ^ priv->keystate) {  in imx_sc_check_for_events()
90 		priv->keystate = state;  in imx_sc_check_for_events()
91 		input_event(input, EV_KEY, priv->keycode, state);  in imx_sc_check_for_events()
93 		if (!priv->keystate)  in imx_sc_check_for_events()
94 			pm_relax(priv->input->dev.parent);  in imx_sc_check_for_events()
98 		schedule_delayed_work(&priv->check_work,  in imx_sc_check_for_events()
107 	imx_scu_irq_unregister_notifier(&priv->key_notifier);  in imx_sc_key_action()
108 	cancel_delayed_work_sync(&priv->check_work);  in imx_sc_key_action()
117 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);  in imx_sc_key_probe()
119 		return -ENOMEM;  in imx_sc_key_probe()
121 	error = imx_scu_get_handle(&priv->key_ipc_handle);  in imx_sc_key_probe()
125 	if (device_property_read_u32(&pdev->dev, "linux,keycodes",  in imx_sc_key_probe()
126 				     &priv->keycode)) {  in imx_sc_key_probe()
127 		dev_err(&pdev->dev, "missing linux,keycodes property\n");  in imx_sc_key_probe()
128 		return -EINVAL;  in imx_sc_key_probe()
131 	INIT_DELAYED_WORK(&priv->check_work, imx_sc_check_for_events);  in imx_sc_key_probe()
133 	input = devm_input_allocate_device(&pdev->dev);  in imx_sc_key_probe()
135 		dev_err(&pdev->dev, "failed to allocate the input device\n");  in imx_sc_key_probe()
136 		return -ENOMEM;  in imx_sc_key_probe()
139 	input->name = pdev->name;  in imx_sc_key_probe()
140 	input->phys = "imx-sc-key/input0";  in imx_sc_key_probe()
141 	input->id.bustype = BUS_HOST;  in imx_sc_key_probe()
143 	input_set_capability(input, EV_KEY, priv->keycode);  in imx_sc_key_probe()
147 		dev_err(&pdev->dev, "failed to register input device\n");  in imx_sc_key_probe()
151 	priv->input = input;  in imx_sc_key_probe()
157 		dev_err(&pdev->dev, "failed to enable scu group irq\n");  in imx_sc_key_probe()
161 	error = devm_add_action_or_reset(&pdev->dev, imx_sc_key_action, &priv);  in imx_sc_key_probe()
165 	priv->key_notifier.notifier_call = imx_sc_key_notify;  in imx_sc_key_probe()
166 	error = imx_scu_irq_register_notifier(&priv->key_notifier);  in imx_sc_key_probe()
168 		dev_err(&pdev->dev, "failed to register scu notifier\n");  in imx_sc_key_probe()
174 	{ .compatible = "fsl,imx-sc-key" },
181 		.name = "imx-sc-key",
189 MODULE_DESCRIPTION("i.MX System Controller Key Driver");