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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * OnKey device driver for DA9063, DA9062 and DA9061 PMICs
4 * Copyright (C) 2015 Dialog Semiconductor Ltd.
5 */
6
7#include <linux/devm-helpers.h>
8#include <linux/module.h>
9#include <linux/errno.h>
10#include <linux/input.h>
11#include <linux/interrupt.h>
12#include <linux/mod_devicetable.h>
13#include <linux/platform_device.h>
14#include <linux/pm_wakeirq.h>
15#include <linux/property.h>
16#include <linux/workqueue.h>
17#include <linux/regmap.h>
18#include <linux/mfd/da9063/core.h>
19#include <linux/mfd/da9063/registers.h>
20#include <linux/mfd/da9062/core.h>
21#include <linux/mfd/da9062/registers.h>
22
23struct da906x_chip_config {
24 /* REGS */
25 int onkey_status;
26 int onkey_pwr_signalling;
27 int onkey_fault_log;
28 int onkey_shutdown;
29 /* MASKS */
30 int onkey_nonkey_mask;
31 int onkey_nonkey_lock_mask;
32 int onkey_key_reset_mask;
33 int onkey_shutdown_mask;
34 /* NAMES */
35 const char *name;
36};
37
38struct da9063_onkey {
39 struct delayed_work work;
40 struct input_dev *input;
41 struct device *dev;
42 struct regmap *regmap;
43 const struct da906x_chip_config *config;
44 char phys[32];
45 bool key_power;
46};
47
48static const struct da906x_chip_config da9063_regs = {
49 /* REGS */
50 .onkey_status = DA9063_REG_STATUS_A,
51 .onkey_pwr_signalling = DA9063_REG_CONTROL_B,
52 .onkey_fault_log = DA9063_REG_FAULT_LOG,
53 .onkey_shutdown = DA9063_REG_CONTROL_F,
54 /* MASKS */
55 .onkey_nonkey_mask = DA9063_NONKEY,
56 .onkey_nonkey_lock_mask = DA9063_NONKEY_LOCK,
57 .onkey_key_reset_mask = DA9063_KEY_RESET,
58 .onkey_shutdown_mask = DA9063_SHUTDOWN,
59 /* NAMES */
60 .name = DA9063_DRVNAME_ONKEY,
61};
62
63static const struct da906x_chip_config da9062_regs = {
64 /* REGS */
65 .onkey_status = DA9062AA_STATUS_A,
66 .onkey_pwr_signalling = DA9062AA_CONTROL_B,
67 .onkey_fault_log = DA9062AA_FAULT_LOG,
68 .onkey_shutdown = DA9062AA_CONTROL_F,
69 /* MASKS */
70 .onkey_nonkey_mask = DA9062AA_NONKEY_MASK,
71 .onkey_nonkey_lock_mask = DA9062AA_NONKEY_LOCK_MASK,
72 .onkey_key_reset_mask = DA9062AA_KEY_RESET_MASK,
73 .onkey_shutdown_mask = DA9062AA_SHUTDOWN_MASK,
74 /* NAMES */
75 .name = "da9062-onkey",
76};
77
78static void da9063_poll_on(struct work_struct *work)
79{
80 struct da9063_onkey *onkey = container_of(work,
81 struct da9063_onkey,
82 work.work);
83 const struct da906x_chip_config *config = onkey->config;
84 unsigned int val;
85 int fault_log = 0;
86 bool poll = true;
87 int error;
88
89 /* Poll to see when the pin is released */
90 error = regmap_read(onkey->regmap,
91 config->onkey_status,
92 &val);
93 if (error) {
94 dev_err(onkey->dev,
95 "Failed to read ON status: %d\n", error);
96 goto err_poll;
97 }
98
99 if (!(val & config->onkey_nonkey_mask)) {
100 error = regmap_update_bits(onkey->regmap,
101 config->onkey_pwr_signalling,
102 config->onkey_nonkey_lock_mask,
103 0);
104 if (error) {
105 dev_err(onkey->dev,
106 "Failed to reset the Key Delay %d\n", error);
107 goto err_poll;
108 }
109
110 input_report_key(onkey->input, KEY_POWER, 0);
111 input_sync(onkey->input);
112
113 poll = false;
114 }
115
116 /*
117 * If the fault log KEY_RESET is detected, then clear it
118 * and shut down the system.
119 */
120 error = regmap_read(onkey->regmap,
121 config->onkey_fault_log,
122 &fault_log);
123 if (error) {
124 dev_warn(&onkey->input->dev,
125 "Cannot read FAULT_LOG: %d\n", error);
126 } else if (fault_log & config->onkey_key_reset_mask) {
127 error = regmap_write(onkey->regmap,
128 config->onkey_fault_log,
129 config->onkey_key_reset_mask);
130 if (error) {
131 dev_warn(&onkey->input->dev,
132 "Cannot reset KEY_RESET fault log: %d\n",
133 error);
134 } else {
135 /* at this point we do any S/W housekeeping
136 * and then send shutdown command
137 */
138 dev_dbg(&onkey->input->dev,
139 "Sending SHUTDOWN to PMIC ...\n");
140 error = regmap_write(onkey->regmap,
141 config->onkey_shutdown,
142 config->onkey_shutdown_mask);
143 if (error)
144 dev_err(&onkey->input->dev,
145 "Cannot SHUTDOWN PMIC: %d\n",
146 error);
147 }
148 }
149
150err_poll:
151 if (poll)
152 schedule_delayed_work(&onkey->work, msecs_to_jiffies(50));
153}
154
155static irqreturn_t da9063_onkey_irq_handler(int irq, void *data)
156{
157 struct da9063_onkey *onkey = data;
158 const struct da906x_chip_config *config = onkey->config;
159 unsigned int val;
160 int error;
161
162 error = regmap_read(onkey->regmap,
163 config->onkey_status,
164 &val);
165 if (onkey->key_power && !error && (val & config->onkey_nonkey_mask)) {
166 input_report_key(onkey->input, KEY_POWER, 1);
167 input_sync(onkey->input);
168 schedule_delayed_work(&onkey->work, 0);
169 dev_dbg(onkey->dev, "KEY_POWER long press.\n");
170 } else {
171 input_report_key(onkey->input, KEY_POWER, 1);
172 input_sync(onkey->input);
173 input_report_key(onkey->input, KEY_POWER, 0);
174 input_sync(onkey->input);
175 dev_dbg(onkey->dev, "KEY_POWER short press.\n");
176 }
177
178 return IRQ_HANDLED;
179}
180
181static int da9063_onkey_probe(struct platform_device *pdev)
182{
183 struct da9063_onkey *onkey;
184 int error;
185 int irq;
186
187 onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9063_onkey),
188 GFP_KERNEL);
189 if (!onkey)
190 return -ENOMEM;
191
192 onkey->config = device_get_match_data(&pdev->dev);
193 if (!onkey->config)
194 return -ENXIO;
195
196 onkey->dev = &pdev->dev;
197
198 onkey->regmap = dev_get_regmap(pdev->dev.parent, NULL);
199 if (!onkey->regmap)
200 return dev_err_probe(&pdev->dev, -ENXIO,
201 "Parent regmap unavailable.\n");
202
203 onkey->key_power = !device_property_read_bool(&pdev->dev,
204 "dlg,disable-key-power");
205
206 onkey->input = devm_input_allocate_device(&pdev->dev);
207 if (!onkey->input)
208 return -ENOMEM;
209
210 onkey->input->name = onkey->config->name;
211 snprintf(onkey->phys, sizeof(onkey->phys), "%s/input0",
212 onkey->config->name);
213 onkey->input->phys = onkey->phys;
214
215 input_set_capability(onkey->input, EV_KEY, KEY_POWER);
216
217 error = devm_delayed_work_autocancel(&pdev->dev, &onkey->work,
218 da9063_poll_on);
219 if (error)
220 return error;
221
222 irq = platform_get_irq_byname(pdev, "ONKEY");
223 if (irq < 0)
224 return irq;
225
226 error = devm_request_threaded_irq(&pdev->dev, irq,
227 NULL, da9063_onkey_irq_handler,
228 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
229 "ONKEY", onkey);
230 if (error)
231 return dev_err_probe(&pdev->dev, error,
232 "Failed to allocate onkey IRQ\n");
233
234 error = dev_pm_set_wake_irq(&pdev->dev, irq);
235 if (error)
236 dev_warn(&pdev->dev,
237 "Failed to set IRQ %d as a wake IRQ: %d\n",
238 irq, error);
239 else
240 device_init_wakeup(&pdev->dev, true);
241
242 error = input_register_device(onkey->input);
243 if (error)
244 return error;
245
246 return 0;
247}
248
249static const struct of_device_id da9063_compatible_reg_id_table[] = {
250 { .compatible = "dlg,da9063-onkey", .data = &da9063_regs },
251 { .compatible = "dlg,da9062-onkey", .data = &da9062_regs },
252 { }
253};
254MODULE_DEVICE_TABLE(of, da9063_compatible_reg_id_table);
255
256static struct platform_driver da9063_onkey_driver = {
257 .probe = da9063_onkey_probe,
258 .driver = {
259 .name = DA9063_DRVNAME_ONKEY,
260 .of_match_table = da9063_compatible_reg_id_table,
261 },
262};
263module_platform_driver(da9063_onkey_driver);
264
265MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");
266MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063, DA9062 and DA9061");
267MODULE_LICENSE("GPL");
268MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * OnKey device driver for DA9063, DA9062 and DA9061 PMICs
4 * Copyright (C) 2015 Dialog Semiconductor Ltd.
5 */
6
7#include <linux/devm-helpers.h>
8#include <linux/module.h>
9#include <linux/errno.h>
10#include <linux/input.h>
11#include <linux/interrupt.h>
12#include <linux/platform_device.h>
13#include <linux/workqueue.h>
14#include <linux/regmap.h>
15#include <linux/of.h>
16#include <linux/mfd/da9063/core.h>
17#include <linux/mfd/da9063/registers.h>
18#include <linux/mfd/da9062/core.h>
19#include <linux/mfd/da9062/registers.h>
20
21struct da906x_chip_config {
22 /* REGS */
23 int onkey_status;
24 int onkey_pwr_signalling;
25 int onkey_fault_log;
26 int onkey_shutdown;
27 /* MASKS */
28 int onkey_nonkey_mask;
29 int onkey_nonkey_lock_mask;
30 int onkey_key_reset_mask;
31 int onkey_shutdown_mask;
32 /* NAMES */
33 const char *name;
34};
35
36struct da9063_onkey {
37 struct delayed_work work;
38 struct input_dev *input;
39 struct device *dev;
40 struct regmap *regmap;
41 const struct da906x_chip_config *config;
42 char phys[32];
43 bool key_power;
44};
45
46static const struct da906x_chip_config da9063_regs = {
47 /* REGS */
48 .onkey_status = DA9063_REG_STATUS_A,
49 .onkey_pwr_signalling = DA9063_REG_CONTROL_B,
50 .onkey_fault_log = DA9063_REG_FAULT_LOG,
51 .onkey_shutdown = DA9063_REG_CONTROL_F,
52 /* MASKS */
53 .onkey_nonkey_mask = DA9063_NONKEY,
54 .onkey_nonkey_lock_mask = DA9063_NONKEY_LOCK,
55 .onkey_key_reset_mask = DA9063_KEY_RESET,
56 .onkey_shutdown_mask = DA9063_SHUTDOWN,
57 /* NAMES */
58 .name = DA9063_DRVNAME_ONKEY,
59};
60
61static const struct da906x_chip_config da9062_regs = {
62 /* REGS */
63 .onkey_status = DA9062AA_STATUS_A,
64 .onkey_pwr_signalling = DA9062AA_CONTROL_B,
65 .onkey_fault_log = DA9062AA_FAULT_LOG,
66 .onkey_shutdown = DA9062AA_CONTROL_F,
67 /* MASKS */
68 .onkey_nonkey_mask = DA9062AA_NONKEY_MASK,
69 .onkey_nonkey_lock_mask = DA9062AA_NONKEY_LOCK_MASK,
70 .onkey_key_reset_mask = DA9062AA_KEY_RESET_MASK,
71 .onkey_shutdown_mask = DA9062AA_SHUTDOWN_MASK,
72 /* NAMES */
73 .name = "da9062-onkey",
74};
75
76static const struct of_device_id da9063_compatible_reg_id_table[] = {
77 { .compatible = "dlg,da9063-onkey", .data = &da9063_regs },
78 { .compatible = "dlg,da9062-onkey", .data = &da9062_regs },
79 { },
80};
81MODULE_DEVICE_TABLE(of, da9063_compatible_reg_id_table);
82
83static void da9063_poll_on(struct work_struct *work)
84{
85 struct da9063_onkey *onkey = container_of(work,
86 struct da9063_onkey,
87 work.work);
88 const struct da906x_chip_config *config = onkey->config;
89 unsigned int val;
90 int fault_log = 0;
91 bool poll = true;
92 int error;
93
94 /* Poll to see when the pin is released */
95 error = regmap_read(onkey->regmap,
96 config->onkey_status,
97 &val);
98 if (error) {
99 dev_err(onkey->dev,
100 "Failed to read ON status: %d\n", error);
101 goto err_poll;
102 }
103
104 if (!(val & config->onkey_nonkey_mask)) {
105 error = regmap_update_bits(onkey->regmap,
106 config->onkey_pwr_signalling,
107 config->onkey_nonkey_lock_mask,
108 0);
109 if (error) {
110 dev_err(onkey->dev,
111 "Failed to reset the Key Delay %d\n", error);
112 goto err_poll;
113 }
114
115 input_report_key(onkey->input, KEY_POWER, 0);
116 input_sync(onkey->input);
117
118 poll = false;
119 }
120
121 /*
122 * If the fault log KEY_RESET is detected, then clear it
123 * and shut down the system.
124 */
125 error = regmap_read(onkey->regmap,
126 config->onkey_fault_log,
127 &fault_log);
128 if (error) {
129 dev_warn(&onkey->input->dev,
130 "Cannot read FAULT_LOG: %d\n", error);
131 } else if (fault_log & config->onkey_key_reset_mask) {
132 error = regmap_write(onkey->regmap,
133 config->onkey_fault_log,
134 config->onkey_key_reset_mask);
135 if (error) {
136 dev_warn(&onkey->input->dev,
137 "Cannot reset KEY_RESET fault log: %d\n",
138 error);
139 } else {
140 /* at this point we do any S/W housekeeping
141 * and then send shutdown command
142 */
143 dev_dbg(&onkey->input->dev,
144 "Sending SHUTDOWN to PMIC ...\n");
145 error = regmap_write(onkey->regmap,
146 config->onkey_shutdown,
147 config->onkey_shutdown_mask);
148 if (error)
149 dev_err(&onkey->input->dev,
150 "Cannot SHUTDOWN PMIC: %d\n",
151 error);
152 }
153 }
154
155err_poll:
156 if (poll)
157 schedule_delayed_work(&onkey->work, msecs_to_jiffies(50));
158}
159
160static irqreturn_t da9063_onkey_irq_handler(int irq, void *data)
161{
162 struct da9063_onkey *onkey = data;
163 const struct da906x_chip_config *config = onkey->config;
164 unsigned int val;
165 int error;
166
167 error = regmap_read(onkey->regmap,
168 config->onkey_status,
169 &val);
170 if (onkey->key_power && !error && (val & config->onkey_nonkey_mask)) {
171 input_report_key(onkey->input, KEY_POWER, 1);
172 input_sync(onkey->input);
173 schedule_delayed_work(&onkey->work, 0);
174 dev_dbg(onkey->dev, "KEY_POWER long press.\n");
175 } else {
176 input_report_key(onkey->input, KEY_POWER, 1);
177 input_sync(onkey->input);
178 input_report_key(onkey->input, KEY_POWER, 0);
179 input_sync(onkey->input);
180 dev_dbg(onkey->dev, "KEY_POWER short press.\n");
181 }
182
183 return IRQ_HANDLED;
184}
185
186static int da9063_onkey_probe(struct platform_device *pdev)
187{
188 struct da9063_onkey *onkey;
189 const struct of_device_id *match;
190 int irq;
191 int error;
192
193 match = of_match_node(da9063_compatible_reg_id_table,
194 pdev->dev.of_node);
195 if (!match)
196 return -ENXIO;
197
198 onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9063_onkey),
199 GFP_KERNEL);
200 if (!onkey) {
201 dev_err(&pdev->dev, "Failed to allocate memory.\n");
202 return -ENOMEM;
203 }
204
205 onkey->config = match->data;
206 onkey->dev = &pdev->dev;
207
208 onkey->regmap = dev_get_regmap(pdev->dev.parent, NULL);
209 if (!onkey->regmap) {
210 dev_err(&pdev->dev, "Parent regmap unavailable.\n");
211 return -ENXIO;
212 }
213
214 onkey->key_power = !of_property_read_bool(pdev->dev.of_node,
215 "dlg,disable-key-power");
216
217 onkey->input = devm_input_allocate_device(&pdev->dev);
218 if (!onkey->input) {
219 dev_err(&pdev->dev, "Failed to allocated input device.\n");
220 return -ENOMEM;
221 }
222
223 onkey->input->name = onkey->config->name;
224 snprintf(onkey->phys, sizeof(onkey->phys), "%s/input0",
225 onkey->config->name);
226 onkey->input->phys = onkey->phys;
227 onkey->input->dev.parent = &pdev->dev;
228
229 input_set_capability(onkey->input, EV_KEY, KEY_POWER);
230
231 error = devm_delayed_work_autocancel(&pdev->dev, &onkey->work,
232 da9063_poll_on);
233 if (error) {
234 dev_err(&pdev->dev,
235 "Failed to add cancel poll action: %d\n",
236 error);
237 return error;
238 }
239
240 irq = platform_get_irq_byname(pdev, "ONKEY");
241 if (irq < 0)
242 return irq;
243
244 error = devm_request_threaded_irq(&pdev->dev, irq,
245 NULL, da9063_onkey_irq_handler,
246 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
247 "ONKEY", onkey);
248 if (error) {
249 dev_err(&pdev->dev,
250 "Failed to request IRQ %d: %d\n", irq, error);
251 return error;
252 }
253
254 error = input_register_device(onkey->input);
255 if (error) {
256 dev_err(&pdev->dev,
257 "Failed to register input device: %d\n", error);
258 return error;
259 }
260
261 return 0;
262}
263
264static struct platform_driver da9063_onkey_driver = {
265 .probe = da9063_onkey_probe,
266 .driver = {
267 .name = DA9063_DRVNAME_ONKEY,
268 .of_match_table = da9063_compatible_reg_id_table,
269 },
270};
271module_platform_driver(da9063_onkey_driver);
272
273MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");
274MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063, DA9062 and DA9061");
275MODULE_LICENSE("GPL");
276MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY);