1 // SPDX-License-Identifier: GPL-2.0+
3 // Driver for the IMX SNVS ON/OFF Power Key
51 	struct input_dev *input = pdata->input;  in imx_imx_snvs_check_for_events()
54 	regmap_read(pdata->snvs, SNVS_HPSR_REG, &state);  in imx_imx_snvs_check_for_events()
58 	if (state ^ pdata->keystate) {  in imx_imx_snvs_check_for_events()
59 		pdata->keystate = state;  in imx_imx_snvs_check_for_events()
60 		input_event(input, EV_KEY, pdata->keycode, state);  in imx_imx_snvs_check_for_events()
62 		pm_relax(pdata->input->dev.parent);  in imx_imx_snvs_check_for_events()
67 		mod_timer(&pdata->check_timer,  in imx_imx_snvs_check_for_events()
76 	struct input_dev *input = pdata->input;  in imx_snvs_pwrkey_interrupt()
79 	pm_wakeup_event(input->dev.parent, 0);  in imx_snvs_pwrkey_interrupt()
81 	regmap_read(pdata->snvs, SNVS_LPSR_REG, &lp_status);  in imx_snvs_pwrkey_interrupt()
83 		if (pdata->minor_rev == 0) {  in imx_snvs_pwrkey_interrupt()
86 			 * interrupt on button release. To mimic power-key  in imx_snvs_pwrkey_interrupt()
89 			input_report_key(input, pdata->keycode, 1);  in imx_snvs_pwrkey_interrupt()
91 			input_report_key(input, pdata->keycode, 0);  in imx_snvs_pwrkey_interrupt()
93 			pm_relax(input->dev.parent);  in imx_snvs_pwrkey_interrupt()
95 			mod_timer(&pdata->check_timer,  in imx_snvs_pwrkey_interrupt()
101 	regmap_write(pdata->snvs, SNVS_LPSR_REG, SNVS_LPSR_SPO);  in imx_snvs_pwrkey_interrupt()
110 	timer_delete_sync(&pd->check_timer);  in imx_snvs_pwrkey_act()
125 	np = pdev->dev.of_node;  in imx_snvs_pwrkey_probe()
127 		return -ENODEV;  in imx_snvs_pwrkey_probe()
129 	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);  in imx_snvs_pwrkey_probe()
131 		return -ENOMEM;  in imx_snvs_pwrkey_probe()
133 	pdata->snvs = syscon_regmap_lookup_by_phandle(np, "regmap");  in imx_snvs_pwrkey_probe()
134 	if (IS_ERR(pdata->snvs)) {  in imx_snvs_pwrkey_probe()
135 		dev_err(&pdev->dev, "Can't get snvs syscon\n");  in imx_snvs_pwrkey_probe()
136 		return PTR_ERR(pdata->snvs);  in imx_snvs_pwrkey_probe()
139 	if (of_property_read_u32(np, "linux,keycode", &pdata->keycode)) {  in imx_snvs_pwrkey_probe()
140 		pdata->keycode = KEY_POWER;  in imx_snvs_pwrkey_probe()
141 		dev_warn(&pdev->dev, "KEY_POWER without setting in dts\n");  in imx_snvs_pwrkey_probe()
144 	clk = devm_clk_get_optional_enabled(&pdev->dev, NULL);  in imx_snvs_pwrkey_probe()
146 		dev_err(&pdev->dev, "Failed to get snvs clock (%pe)\n", clk);  in imx_snvs_pwrkey_probe()
150 	pdata->wakeup = of_property_read_bool(np, "wakeup-source");  in imx_snvs_pwrkey_probe()
152 	pdata->irq = platform_get_irq(pdev, 0);  in imx_snvs_pwrkey_probe()
153 	if (pdata->irq < 0)  in imx_snvs_pwrkey_probe()
154 		return -EINVAL;  in imx_snvs_pwrkey_probe()
156 	error = of_property_read_u32(np, "power-off-time-sec", &val);  in imx_snvs_pwrkey_probe()
165 			bpt = (val / 5) - 1;  in imx_snvs_pwrkey_probe()
168 			dev_err(&pdev->dev,  in imx_snvs_pwrkey_probe()
169 				"power-off-time-sec %d out of range\n", val);  in imx_snvs_pwrkey_probe()
170 			return -EINVAL;  in imx_snvs_pwrkey_probe()
173 		regmap_update_bits(pdata->snvs, SNVS_LPCR_REG, SNVS_LPCR_BPT_MASK,  in imx_snvs_pwrkey_probe()
177 	regmap_read(pdata->snvs, SNVS_HPVIDR1_REG, &vid);  in imx_snvs_pwrkey_probe()
178 	pdata->minor_rev = vid & 0xff;  in imx_snvs_pwrkey_probe()
180 	regmap_update_bits(pdata->snvs, SNVS_LPCR_REG, SNVS_LPCR_DEP_EN, SNVS_LPCR_DEP_EN);  in imx_snvs_pwrkey_probe()
183 	regmap_write(pdata->snvs, SNVS_LPSR_REG, SNVS_LPSR_SPO);  in imx_snvs_pwrkey_probe()
185 	timer_setup(&pdata->check_timer, imx_imx_snvs_check_for_events, 0);  in imx_snvs_pwrkey_probe()
187 	input = devm_input_allocate_device(&pdev->dev);  in imx_snvs_pwrkey_probe()
189 		dev_err(&pdev->dev, "failed to allocate the input device\n");  in imx_snvs_pwrkey_probe()
190 		return -ENOMEM;  in imx_snvs_pwrkey_probe()
193 	input->name = pdev->name;  in imx_snvs_pwrkey_probe()
194 	input->phys = "snvs-pwrkey/input0";  in imx_snvs_pwrkey_probe()
195 	input->id.bustype = BUS_HOST;  in imx_snvs_pwrkey_probe()
197 	input_set_capability(input, EV_KEY, pdata->keycode);  in imx_snvs_pwrkey_probe()
200 	error = devm_add_action(&pdev->dev, imx_snvs_pwrkey_act, pdata);  in imx_snvs_pwrkey_probe()
202 		dev_err(&pdev->dev, "failed to register remove action\n");  in imx_snvs_pwrkey_probe()
206 	pdata->input = input;  in imx_snvs_pwrkey_probe()
209 	error = devm_request_irq(&pdev->dev, pdata->irq,  in imx_snvs_pwrkey_probe()
211 			       0, pdev->name, pdev);  in imx_snvs_pwrkey_probe()
213 		dev_err(&pdev->dev, "interrupt not available.\n");  in imx_snvs_pwrkey_probe()
219 		dev_err(&pdev->dev, "failed to register input device\n");  in imx_snvs_pwrkey_probe()
223 	device_init_wakeup(&pdev->dev, pdata->wakeup);  in imx_snvs_pwrkey_probe()
224 	error = dev_pm_set_wake_irq(&pdev->dev, pdata->irq);  in imx_snvs_pwrkey_probe()
226 		dev_err(&pdev->dev, "irq wake enable failed.\n");  in imx_snvs_pwrkey_probe()
232 	{ .compatible = "fsl,sec-v4.0-pwrkey" },
247 MODULE_DESCRIPTION("i.MX snvs power key Driver");