1 // SPDX-License-Identifier: GPL-2.0-only
8 #include <linux/bitmap.h>
9 #include <linux/bitops.h>
10 #include <linux/device.h>
11 #include <linux/i2c.h>
12 #include <linux/input.h>
13 #include <linux/interrupt.h>
14 #include <linux/module.h>
15 #include <linux/pm.h>
16 #include <linux/regulator/consumer.h>
18 #define CYPRESS_SF_DEV_NAME "cypress-sf"
26 	u32 *keycodes;  member
38 	val = i2c_smbus_read_byte_data(touchkey->client,  in cypress_sf_irq_handler()
41 		dev_err(&touchkey->client->dev,  in cypress_sf_irq_handler()
47 	bitmap_xor(&changed, &keystates, &touchkey->keystates,  in cypress_sf_irq_handler()
48 		   touchkey->num_keys);  in cypress_sf_irq_handler()
50 	for_each_set_bit(key, &changed, touchkey->num_keys) {  in cypress_sf_irq_handler()
52 		dev_dbg(&touchkey->client->dev,  in cypress_sf_irq_handler()
54 		input_report_key(touchkey->input_dev,  in cypress_sf_irq_handler()
55 				 touchkey->keycodes[key], new_state);  in cypress_sf_irq_handler()
58 	input_sync(touchkey->input_dev);  in cypress_sf_irq_handler()
59 	touchkey->keystates = keystates;  in cypress_sf_irq_handler()
68 	regulator_bulk_disable(ARRAY_SIZE(touchkey->regulators),  in cypress_sf_disable_regulators()
69 			       touchkey->regulators);  in cypress_sf_disable_regulators()
77 	touchkey = devm_kzalloc(&client->dev, sizeof(*touchkey), GFP_KERNEL);  in cypress_sf_probe()
79 		return -ENOMEM;  in cypress_sf_probe()
81 	touchkey->client = client;  in cypress_sf_probe()
84 	touchkey->regulators[0].supply = "vdd";  in cypress_sf_probe()
85 	touchkey->regulators[1].supply = "avdd";  in cypress_sf_probe()
87 	error = devm_regulator_bulk_get(&client->dev,  in cypress_sf_probe()
88 					ARRAY_SIZE(touchkey->regulators),  in cypress_sf_probe()
89 					touchkey->regulators);  in cypress_sf_probe()
91 		dev_err(&client->dev, "Failed to get regulators: %d\n", error);  in cypress_sf_probe()
95 	touchkey->num_keys = device_property_read_u32_array(&client->dev,  in cypress_sf_probe()
96 							    "linux,keycodes",  in cypress_sf_probe()
98 	if (touchkey->num_keys < 0) {  in cypress_sf_probe()
100 		touchkey->num_keys = 2;  in cypress_sf_probe()
103 	touchkey->keycodes = devm_kcalloc(&client->dev,  in cypress_sf_probe()
104 					  touchkey->num_keys,  in cypress_sf_probe()
105 					  sizeof(*touchkey->keycodes),  in cypress_sf_probe()
107 	if (!touchkey->keycodes)  in cypress_sf_probe()
108 		return -ENOMEM;  in cypress_sf_probe()
110 	error = device_property_read_u32_array(&client->dev, "linux,keycodes",  in cypress_sf_probe()
111 					       touchkey->keycodes,  in cypress_sf_probe()
112 					       touchkey->num_keys);  in cypress_sf_probe()
115 		dev_warn(&client->dev,  in cypress_sf_probe()
116 			 "Failed to read keycodes: %d, using defaults\n",  in cypress_sf_probe()
119 		/* Default keycodes */  in cypress_sf_probe()
120 		touchkey->keycodes[0] = KEY_BACK;  in cypress_sf_probe()
121 		touchkey->keycodes[1] = KEY_MENU;  in cypress_sf_probe()
124 	error = regulator_bulk_enable(ARRAY_SIZE(touchkey->regulators),  in cypress_sf_probe()
125 				      touchkey->regulators);  in cypress_sf_probe()
127 		dev_err(&client->dev,  in cypress_sf_probe()
132 	error = devm_add_action_or_reset(&client->dev,  in cypress_sf_probe()
138 	touchkey->input_dev = devm_input_allocate_device(&client->dev);  in cypress_sf_probe()
139 	if (!touchkey->input_dev) {  in cypress_sf_probe()
140 		dev_err(&client->dev, "Failed to allocate input device\n");  in cypress_sf_probe()
141 		return -ENOMEM;  in cypress_sf_probe()
144 	touchkey->input_dev->name = CYPRESS_SF_DEV_NAME;  in cypress_sf_probe()
145 	touchkey->input_dev->id.bustype = BUS_I2C;  in cypress_sf_probe()
147 	for (key = 0; key < touchkey->num_keys; ++key)  in cypress_sf_probe()
148 		input_set_capability(touchkey->input_dev,  in cypress_sf_probe()
149 				     EV_KEY, touchkey->keycodes[key]);  in cypress_sf_probe()
151 	error = input_register_device(touchkey->input_dev);  in cypress_sf_probe()
153 		dev_err(&client->dev,  in cypress_sf_probe()
158 	error = devm_request_threaded_irq(&client->dev, client->irq,  in cypress_sf_probe()
163 		dev_err(&client->dev,  in cypress_sf_probe()
177 	disable_irq(client->irq);  in cypress_sf_suspend()
179 	error = regulator_bulk_disable(ARRAY_SIZE(touchkey->regulators),  in cypress_sf_suspend()
180 				       touchkey->regulators);  in cypress_sf_suspend()
183 		enable_irq(client->irq);  in cypress_sf_suspend()
196 	error = regulator_bulk_enable(ARRAY_SIZE(touchkey->regulators),  in cypress_sf_resume()
197 				      touchkey->regulators);  in cypress_sf_resume()
203 	enable_irq(client->irq);  in cypress_sf_resume()