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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2017 MediaTek, Inc.
4 *
5 * Author: Chen Zhong <chen.zhong@mediatek.com>
6 */
7
8#include <linux/input.h>
9#include <linux/interrupt.h>
10#include <linux/kernel.h>
11#include <linux/mfd/mt6323/registers.h>
12#include <linux/mfd/mt6331/registers.h>
13#include <linux/mfd/mt6358/registers.h>
14#include <linux/mfd/mt6397/core.h>
15#include <linux/mfd/mt6397/registers.h>
16#include <linux/module.h>
17#include <linux/of_device.h>
18#include <linux/of.h>
19#include <linux/platform_device.h>
20#include <linux/regmap.h>
21
22#define MTK_PMIC_RST_DU_MASK GENMASK(9, 8)
23#define MTK_PMIC_PWRKEY_RST BIT(6)
24#define MTK_PMIC_HOMEKEY_RST BIT(5)
25
26#define MTK_PMIC_MT6331_RST_DU_MASK GENMASK(13, 12)
27#define MTK_PMIC_MT6331_PWRKEY_RST BIT(9)
28#define MTK_PMIC_MT6331_HOMEKEY_RST BIT(8)
29
30#define MTK_PMIC_PWRKEY_INDEX 0
31#define MTK_PMIC_HOMEKEY_INDEX 1
32#define MTK_PMIC_MAX_KEY_COUNT 2
33
34struct mtk_pmic_keys_regs {
35 u32 deb_reg;
36 u32 deb_mask;
37 u32 intsel_reg;
38 u32 intsel_mask;
39 u32 rst_en_mask;
40};
41
42#define MTK_PMIC_KEYS_REGS(_deb_reg, _deb_mask, \
43 _intsel_reg, _intsel_mask, _rst_mask) \
44{ \
45 .deb_reg = _deb_reg, \
46 .deb_mask = _deb_mask, \
47 .intsel_reg = _intsel_reg, \
48 .intsel_mask = _intsel_mask, \
49 .rst_en_mask = _rst_mask, \
50}
51
52struct mtk_pmic_regs {
53 const struct mtk_pmic_keys_regs keys_regs[MTK_PMIC_MAX_KEY_COUNT];
54 u32 pmic_rst_reg;
55 u32 rst_lprst_mask; /* Long-press reset timeout bitmask */
56};
57
58static const struct mtk_pmic_regs mt6397_regs = {
59 .keys_regs[MTK_PMIC_PWRKEY_INDEX] =
60 MTK_PMIC_KEYS_REGS(MT6397_CHRSTATUS,
61 0x8, MT6397_INT_RSV, 0x10, MTK_PMIC_PWRKEY_RST),
62 .keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
63 MTK_PMIC_KEYS_REGS(MT6397_OCSTATUS2,
64 0x10, MT6397_INT_RSV, 0x8, MTK_PMIC_HOMEKEY_RST),
65 .pmic_rst_reg = MT6397_TOP_RST_MISC,
66 .rst_lprst_mask = MTK_PMIC_RST_DU_MASK,
67};
68
69static const struct mtk_pmic_regs mt6323_regs = {
70 .keys_regs[MTK_PMIC_PWRKEY_INDEX] =
71 MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS,
72 0x2, MT6323_INT_MISC_CON, 0x10, MTK_PMIC_PWRKEY_RST),
73 .keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
74 MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS,
75 0x4, MT6323_INT_MISC_CON, 0x8, MTK_PMIC_HOMEKEY_RST),
76 .pmic_rst_reg = MT6323_TOP_RST_MISC,
77 .rst_lprst_mask = MTK_PMIC_RST_DU_MASK,
78};
79
80static const struct mtk_pmic_regs mt6331_regs = {
81 .keys_regs[MTK_PMIC_PWRKEY_INDEX] =
82 MTK_PMIC_KEYS_REGS(MT6331_TOPSTATUS, 0x2,
83 MT6331_INT_MISC_CON, 0x4,
84 MTK_PMIC_MT6331_PWRKEY_RST),
85 .keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
86 MTK_PMIC_KEYS_REGS(MT6331_TOPSTATUS, 0x4,
87 MT6331_INT_MISC_CON, 0x2,
88 MTK_PMIC_MT6331_HOMEKEY_RST),
89 .pmic_rst_reg = MT6331_TOP_RST_MISC,
90 .rst_lprst_mask = MTK_PMIC_MT6331_RST_DU_MASK,
91};
92
93static const struct mtk_pmic_regs mt6358_regs = {
94 .keys_regs[MTK_PMIC_PWRKEY_INDEX] =
95 MTK_PMIC_KEYS_REGS(MT6358_TOPSTATUS,
96 0x2, MT6358_PSC_TOP_INT_CON0, 0x5,
97 MTK_PMIC_PWRKEY_RST),
98 .keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
99 MTK_PMIC_KEYS_REGS(MT6358_TOPSTATUS,
100 0x8, MT6358_PSC_TOP_INT_CON0, 0xa,
101 MTK_PMIC_HOMEKEY_RST),
102 .pmic_rst_reg = MT6358_TOP_RST_MISC,
103 .rst_lprst_mask = MTK_PMIC_RST_DU_MASK,
104};
105
106struct mtk_pmic_keys_info {
107 struct mtk_pmic_keys *keys;
108 const struct mtk_pmic_keys_regs *regs;
109 unsigned int keycode;
110 int irq;
111 int irq_r; /* optional: release irq if different */
112 bool wakeup:1;
113};
114
115struct mtk_pmic_keys {
116 struct input_dev *input_dev;
117 struct device *dev;
118 struct regmap *regmap;
119 struct mtk_pmic_keys_info keys[MTK_PMIC_MAX_KEY_COUNT];
120};
121
122enum mtk_pmic_keys_lp_mode {
123 LP_DISABLE,
124 LP_ONEKEY,
125 LP_TWOKEY,
126};
127
128static void mtk_pmic_keys_lp_reset_setup(struct mtk_pmic_keys *keys,
129 const struct mtk_pmic_regs *regs)
130{
131 const struct mtk_pmic_keys_regs *kregs_home, *kregs_pwr;
132 u32 long_press_mode, long_press_debounce;
133 u32 value, mask;
134 int error;
135
136 kregs_home = keys->keys[MTK_PMIC_HOMEKEY_INDEX].regs;
137 kregs_pwr = keys->keys[MTK_PMIC_PWRKEY_INDEX].regs;
138
139 error = of_property_read_u32(keys->dev->of_node, "power-off-time-sec",
140 &long_press_debounce);
141 if (error)
142 long_press_debounce = 0;
143
144 mask = regs->rst_lprst_mask;
145 value = long_press_debounce << (ffs(regs->rst_lprst_mask) - 1);
146
147 error = of_property_read_u32(keys->dev->of_node,
148 "mediatek,long-press-mode",
149 &long_press_mode);
150 if (error)
151 long_press_mode = LP_DISABLE;
152
153 switch (long_press_mode) {
154 case LP_TWOKEY:
155 value |= kregs_home->rst_en_mask;
156 fallthrough;
157
158 case LP_ONEKEY:
159 value |= kregs_pwr->rst_en_mask;
160 fallthrough;
161
162 case LP_DISABLE:
163 mask |= kregs_home->rst_en_mask;
164 mask |= kregs_pwr->rst_en_mask;
165 break;
166
167 default:
168 break;
169 }
170
171 regmap_update_bits(keys->regmap, regs->pmic_rst_reg, mask, value);
172}
173
174static irqreturn_t mtk_pmic_keys_irq_handler_thread(int irq, void *data)
175{
176 struct mtk_pmic_keys_info *info = data;
177 u32 key_deb, pressed;
178
179 regmap_read(info->keys->regmap, info->regs->deb_reg, &key_deb);
180
181 key_deb &= info->regs->deb_mask;
182
183 pressed = !key_deb;
184
185 input_report_key(info->keys->input_dev, info->keycode, pressed);
186 input_sync(info->keys->input_dev);
187
188 dev_dbg(info->keys->dev, "(%s) key =%d using PMIC\n",
189 pressed ? "pressed" : "released", info->keycode);
190
191 return IRQ_HANDLED;
192}
193
194static int mtk_pmic_key_setup(struct mtk_pmic_keys *keys,
195 struct mtk_pmic_keys_info *info)
196{
197 int ret;
198
199 info->keys = keys;
200
201 ret = regmap_update_bits(keys->regmap, info->regs->intsel_reg,
202 info->regs->intsel_mask,
203 info->regs->intsel_mask);
204 if (ret < 0)
205 return ret;
206
207 ret = devm_request_threaded_irq(keys->dev, info->irq, NULL,
208 mtk_pmic_keys_irq_handler_thread,
209 IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
210 "mtk-pmic-keys", info);
211 if (ret) {
212 dev_err(keys->dev, "Failed to request IRQ: %d: %d\n",
213 info->irq, ret);
214 return ret;
215 }
216
217 if (info->irq_r > 0) {
218 ret = devm_request_threaded_irq(keys->dev, info->irq_r, NULL,
219 mtk_pmic_keys_irq_handler_thread,
220 IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
221 "mtk-pmic-keys", info);
222 if (ret) {
223 dev_err(keys->dev, "Failed to request IRQ_r: %d: %d\n",
224 info->irq, ret);
225 return ret;
226 }
227 }
228
229 input_set_capability(keys->input_dev, EV_KEY, info->keycode);
230
231 return 0;
232}
233
234static int mtk_pmic_keys_suspend(struct device *dev)
235{
236 struct mtk_pmic_keys *keys = dev_get_drvdata(dev);
237 int index;
238
239 for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
240 if (keys->keys[index].wakeup) {
241 enable_irq_wake(keys->keys[index].irq);
242 if (keys->keys[index].irq_r > 0)
243 enable_irq_wake(keys->keys[index].irq_r);
244 }
245 }
246
247 return 0;
248}
249
250static int mtk_pmic_keys_resume(struct device *dev)
251{
252 struct mtk_pmic_keys *keys = dev_get_drvdata(dev);
253 int index;
254
255 for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
256 if (keys->keys[index].wakeup) {
257 disable_irq_wake(keys->keys[index].irq);
258 if (keys->keys[index].irq_r > 0)
259 disable_irq_wake(keys->keys[index].irq_r);
260 }
261 }
262
263 return 0;
264}
265
266static DEFINE_SIMPLE_DEV_PM_OPS(mtk_pmic_keys_pm_ops, mtk_pmic_keys_suspend,
267 mtk_pmic_keys_resume);
268
269static const struct of_device_id of_mtk_pmic_keys_match_tbl[] = {
270 {
271 .compatible = "mediatek,mt6397-keys",
272 .data = &mt6397_regs,
273 }, {
274 .compatible = "mediatek,mt6323-keys",
275 .data = &mt6323_regs,
276 }, {
277 .compatible = "mediatek,mt6331-keys",
278 .data = &mt6331_regs,
279 }, {
280 .compatible = "mediatek,mt6358-keys",
281 .data = &mt6358_regs,
282 }, {
283 /* sentinel */
284 }
285};
286MODULE_DEVICE_TABLE(of, of_mtk_pmic_keys_match_tbl);
287
288static int mtk_pmic_keys_probe(struct platform_device *pdev)
289{
290 int error, index = 0;
291 unsigned int keycount;
292 struct mt6397_chip *pmic_chip = dev_get_drvdata(pdev->dev.parent);
293 struct device_node *node = pdev->dev.of_node, *child;
294 static const char *const irqnames[] = { "powerkey", "homekey" };
295 static const char *const irqnames_r[] = { "powerkey_r", "homekey_r" };
296 struct mtk_pmic_keys *keys;
297 const struct mtk_pmic_regs *mtk_pmic_regs;
298 struct input_dev *input_dev;
299 const struct of_device_id *of_id =
300 of_match_device(of_mtk_pmic_keys_match_tbl, &pdev->dev);
301
302 keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL);
303 if (!keys)
304 return -ENOMEM;
305
306 keys->dev = &pdev->dev;
307 keys->regmap = pmic_chip->regmap;
308 mtk_pmic_regs = of_id->data;
309
310 keys->input_dev = input_dev = devm_input_allocate_device(keys->dev);
311 if (!input_dev) {
312 dev_err(keys->dev, "input allocate device fail.\n");
313 return -ENOMEM;
314 }
315
316 input_dev->name = "mtk-pmic-keys";
317 input_dev->id.bustype = BUS_HOST;
318 input_dev->id.vendor = 0x0001;
319 input_dev->id.product = 0x0001;
320 input_dev->id.version = 0x0001;
321
322 keycount = of_get_available_child_count(node);
323 if (keycount > MTK_PMIC_MAX_KEY_COUNT ||
324 keycount > ARRAY_SIZE(irqnames)) {
325 dev_err(keys->dev, "too many keys defined (%d)\n", keycount);
326 return -EINVAL;
327 }
328
329 for_each_child_of_node(node, child) {
330 keys->keys[index].regs = &mtk_pmic_regs->keys_regs[index];
331
332 keys->keys[index].irq =
333 platform_get_irq_byname(pdev, irqnames[index]);
334 if (keys->keys[index].irq < 0) {
335 of_node_put(child);
336 return keys->keys[index].irq;
337 }
338
339 if (of_device_is_compatible(node, "mediatek,mt6358-keys")) {
340 keys->keys[index].irq_r = platform_get_irq_byname(pdev,
341 irqnames_r[index]);
342
343 if (keys->keys[index].irq_r < 0) {
344 of_node_put(child);
345 return keys->keys[index].irq_r;
346 }
347 }
348
349 error = of_property_read_u32(child,
350 "linux,keycodes", &keys->keys[index].keycode);
351 if (error) {
352 dev_err(keys->dev,
353 "failed to read key:%d linux,keycode property: %d\n",
354 index, error);
355 of_node_put(child);
356 return error;
357 }
358
359 if (of_property_read_bool(child, "wakeup-source"))
360 keys->keys[index].wakeup = true;
361
362 error = mtk_pmic_key_setup(keys, &keys->keys[index]);
363 if (error) {
364 of_node_put(child);
365 return error;
366 }
367
368 index++;
369 }
370
371 error = input_register_device(input_dev);
372 if (error) {
373 dev_err(&pdev->dev,
374 "register input device failed (%d)\n", error);
375 return error;
376 }
377
378 mtk_pmic_keys_lp_reset_setup(keys, mtk_pmic_regs);
379
380 platform_set_drvdata(pdev, keys);
381
382 return 0;
383}
384
385static struct platform_driver pmic_keys_pdrv = {
386 .probe = mtk_pmic_keys_probe,
387 .driver = {
388 .name = "mtk-pmic-keys",
389 .of_match_table = of_mtk_pmic_keys_match_tbl,
390 .pm = pm_sleep_ptr(&mtk_pmic_keys_pm_ops),
391 },
392};
393
394module_platform_driver(pmic_keys_pdrv);
395
396MODULE_LICENSE("GPL v2");
397MODULE_AUTHOR("Chen Zhong <chen.zhong@mediatek.com>");
398MODULE_DESCRIPTION("MTK pmic-keys driver v0.1");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2017 MediaTek, Inc.
4 *
5 * Author: Chen Zhong <chen.zhong@mediatek.com>
6 */
7
8#include <linux/input.h>
9#include <linux/interrupt.h>
10#include <linux/kernel.h>
11#include <linux/mfd/mt6323/registers.h>
12#include <linux/mfd/mt6397/core.h>
13#include <linux/mfd/mt6397/registers.h>
14#include <linux/module.h>
15#include <linux/of_device.h>
16#include <linux/of.h>
17#include <linux/platform_device.h>
18#include <linux/regmap.h>
19
20#define MTK_PMIC_PWRKEY_RST_EN_MASK 0x1
21#define MTK_PMIC_PWRKEY_RST_EN_SHIFT 6
22#define MTK_PMIC_HOMEKEY_RST_EN_MASK 0x1
23#define MTK_PMIC_HOMEKEY_RST_EN_SHIFT 5
24#define MTK_PMIC_RST_DU_MASK 0x3
25#define MTK_PMIC_RST_DU_SHIFT 8
26
27#define MTK_PMIC_PWRKEY_RST \
28 (MTK_PMIC_PWRKEY_RST_EN_MASK << MTK_PMIC_PWRKEY_RST_EN_SHIFT)
29#define MTK_PMIC_HOMEKEY_RST \
30 (MTK_PMIC_HOMEKEY_RST_EN_MASK << MTK_PMIC_HOMEKEY_RST_EN_SHIFT)
31
32#define MTK_PMIC_PWRKEY_INDEX 0
33#define MTK_PMIC_HOMEKEY_INDEX 1
34#define MTK_PMIC_MAX_KEY_COUNT 2
35
36struct mtk_pmic_keys_regs {
37 u32 deb_reg;
38 u32 deb_mask;
39 u32 intsel_reg;
40 u32 intsel_mask;
41};
42
43#define MTK_PMIC_KEYS_REGS(_deb_reg, _deb_mask, \
44 _intsel_reg, _intsel_mask) \
45{ \
46 .deb_reg = _deb_reg, \
47 .deb_mask = _deb_mask, \
48 .intsel_reg = _intsel_reg, \
49 .intsel_mask = _intsel_mask, \
50}
51
52struct mtk_pmic_regs {
53 const struct mtk_pmic_keys_regs keys_regs[MTK_PMIC_MAX_KEY_COUNT];
54 u32 pmic_rst_reg;
55};
56
57static const struct mtk_pmic_regs mt6397_regs = {
58 .keys_regs[MTK_PMIC_PWRKEY_INDEX] =
59 MTK_PMIC_KEYS_REGS(MT6397_CHRSTATUS,
60 0x8, MT6397_INT_RSV, 0x10),
61 .keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
62 MTK_PMIC_KEYS_REGS(MT6397_OCSTATUS2,
63 0x10, MT6397_INT_RSV, 0x8),
64 .pmic_rst_reg = MT6397_TOP_RST_MISC,
65};
66
67static const struct mtk_pmic_regs mt6323_regs = {
68 .keys_regs[MTK_PMIC_PWRKEY_INDEX] =
69 MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS,
70 0x2, MT6323_INT_MISC_CON, 0x10),
71 .keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
72 MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS,
73 0x4, MT6323_INT_MISC_CON, 0x8),
74 .pmic_rst_reg = MT6323_TOP_RST_MISC,
75};
76
77struct mtk_pmic_keys_info {
78 struct mtk_pmic_keys *keys;
79 const struct mtk_pmic_keys_regs *regs;
80 unsigned int keycode;
81 int irq;
82 bool wakeup:1;
83};
84
85struct mtk_pmic_keys {
86 struct input_dev *input_dev;
87 struct device *dev;
88 struct regmap *regmap;
89 struct mtk_pmic_keys_info keys[MTK_PMIC_MAX_KEY_COUNT];
90};
91
92enum mtk_pmic_keys_lp_mode {
93 LP_DISABLE,
94 LP_ONEKEY,
95 LP_TWOKEY,
96};
97
98static void mtk_pmic_keys_lp_reset_setup(struct mtk_pmic_keys *keys,
99 u32 pmic_rst_reg)
100{
101 int ret;
102 u32 long_press_mode, long_press_debounce;
103
104 ret = of_property_read_u32(keys->dev->of_node,
105 "power-off-time-sec", &long_press_debounce);
106 if (ret)
107 long_press_debounce = 0;
108
109 regmap_update_bits(keys->regmap, pmic_rst_reg,
110 MTK_PMIC_RST_DU_MASK << MTK_PMIC_RST_DU_SHIFT,
111 long_press_debounce << MTK_PMIC_RST_DU_SHIFT);
112
113 ret = of_property_read_u32(keys->dev->of_node,
114 "mediatek,long-press-mode", &long_press_mode);
115 if (ret)
116 long_press_mode = LP_DISABLE;
117
118 switch (long_press_mode) {
119 case LP_ONEKEY:
120 regmap_update_bits(keys->regmap, pmic_rst_reg,
121 MTK_PMIC_PWRKEY_RST,
122 MTK_PMIC_PWRKEY_RST);
123 regmap_update_bits(keys->regmap, pmic_rst_reg,
124 MTK_PMIC_HOMEKEY_RST,
125 0);
126 break;
127 case LP_TWOKEY:
128 regmap_update_bits(keys->regmap, pmic_rst_reg,
129 MTK_PMIC_PWRKEY_RST,
130 MTK_PMIC_PWRKEY_RST);
131 regmap_update_bits(keys->regmap, pmic_rst_reg,
132 MTK_PMIC_HOMEKEY_RST,
133 MTK_PMIC_HOMEKEY_RST);
134 break;
135 case LP_DISABLE:
136 regmap_update_bits(keys->regmap, pmic_rst_reg,
137 MTK_PMIC_PWRKEY_RST,
138 0);
139 regmap_update_bits(keys->regmap, pmic_rst_reg,
140 MTK_PMIC_HOMEKEY_RST,
141 0);
142 break;
143 default:
144 break;
145 }
146}
147
148static irqreturn_t mtk_pmic_keys_irq_handler_thread(int irq, void *data)
149{
150 struct mtk_pmic_keys_info *info = data;
151 u32 key_deb, pressed;
152
153 regmap_read(info->keys->regmap, info->regs->deb_reg, &key_deb);
154
155 key_deb &= info->regs->deb_mask;
156
157 pressed = !key_deb;
158
159 input_report_key(info->keys->input_dev, info->keycode, pressed);
160 input_sync(info->keys->input_dev);
161
162 dev_dbg(info->keys->dev, "(%s) key =%d using PMIC\n",
163 pressed ? "pressed" : "released", info->keycode);
164
165 return IRQ_HANDLED;
166}
167
168static int mtk_pmic_key_setup(struct mtk_pmic_keys *keys,
169 struct mtk_pmic_keys_info *info)
170{
171 int ret;
172
173 info->keys = keys;
174
175 ret = regmap_update_bits(keys->regmap, info->regs->intsel_reg,
176 info->regs->intsel_mask,
177 info->regs->intsel_mask);
178 if (ret < 0)
179 return ret;
180
181 ret = devm_request_threaded_irq(keys->dev, info->irq, NULL,
182 mtk_pmic_keys_irq_handler_thread,
183 IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
184 "mtk-pmic-keys", info);
185 if (ret) {
186 dev_err(keys->dev, "Failed to request IRQ: %d: %d\n",
187 info->irq, ret);
188 return ret;
189 }
190
191 input_set_capability(keys->input_dev, EV_KEY, info->keycode);
192
193 return 0;
194}
195
196static int __maybe_unused mtk_pmic_keys_suspend(struct device *dev)
197{
198 struct mtk_pmic_keys *keys = dev_get_drvdata(dev);
199 int index;
200
201 for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
202 if (keys->keys[index].wakeup)
203 enable_irq_wake(keys->keys[index].irq);
204 }
205
206 return 0;
207}
208
209static int __maybe_unused mtk_pmic_keys_resume(struct device *dev)
210{
211 struct mtk_pmic_keys *keys = dev_get_drvdata(dev);
212 int index;
213
214 for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
215 if (keys->keys[index].wakeup)
216 disable_irq_wake(keys->keys[index].irq);
217 }
218
219 return 0;
220}
221
222static SIMPLE_DEV_PM_OPS(mtk_pmic_keys_pm_ops, mtk_pmic_keys_suspend,
223 mtk_pmic_keys_resume);
224
225static const struct of_device_id of_mtk_pmic_keys_match_tbl[] = {
226 {
227 .compatible = "mediatek,mt6397-keys",
228 .data = &mt6397_regs,
229 }, {
230 .compatible = "mediatek,mt6323-keys",
231 .data = &mt6323_regs,
232 }, {
233 /* sentinel */
234 }
235};
236MODULE_DEVICE_TABLE(of, of_mtk_pmic_keys_match_tbl);
237
238static int mtk_pmic_keys_probe(struct platform_device *pdev)
239{
240 int error, index = 0;
241 unsigned int keycount;
242 struct mt6397_chip *pmic_chip = dev_get_drvdata(pdev->dev.parent);
243 struct device_node *node = pdev->dev.of_node, *child;
244 struct mtk_pmic_keys *keys;
245 const struct mtk_pmic_regs *mtk_pmic_regs;
246 struct input_dev *input_dev;
247 const struct of_device_id *of_id =
248 of_match_device(of_mtk_pmic_keys_match_tbl, &pdev->dev);
249
250 keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL);
251 if (!keys)
252 return -ENOMEM;
253
254 keys->dev = &pdev->dev;
255 keys->regmap = pmic_chip->regmap;
256 mtk_pmic_regs = of_id->data;
257
258 keys->input_dev = input_dev = devm_input_allocate_device(keys->dev);
259 if (!input_dev) {
260 dev_err(keys->dev, "input allocate device fail.\n");
261 return -ENOMEM;
262 }
263
264 input_dev->name = "mtk-pmic-keys";
265 input_dev->id.bustype = BUS_HOST;
266 input_dev->id.vendor = 0x0001;
267 input_dev->id.product = 0x0001;
268 input_dev->id.version = 0x0001;
269
270 keycount = of_get_available_child_count(node);
271 if (keycount > MTK_PMIC_MAX_KEY_COUNT) {
272 dev_err(keys->dev, "too many keys defined (%d)\n", keycount);
273 return -EINVAL;
274 }
275
276 for_each_child_of_node(node, child) {
277 keys->keys[index].regs = &mtk_pmic_regs->keys_regs[index];
278
279 keys->keys[index].irq = platform_get_irq(pdev, index);
280 if (keys->keys[index].irq < 0) {
281 of_node_put(child);
282 return keys->keys[index].irq;
283 }
284
285 error = of_property_read_u32(child,
286 "linux,keycodes", &keys->keys[index].keycode);
287 if (error) {
288 dev_err(keys->dev,
289 "failed to read key:%d linux,keycode property: %d\n",
290 index, error);
291 of_node_put(child);
292 return error;
293 }
294
295 if (of_property_read_bool(child, "wakeup-source"))
296 keys->keys[index].wakeup = true;
297
298 error = mtk_pmic_key_setup(keys, &keys->keys[index]);
299 if (error) {
300 of_node_put(child);
301 return error;
302 }
303
304 index++;
305 }
306
307 error = input_register_device(input_dev);
308 if (error) {
309 dev_err(&pdev->dev,
310 "register input device failed (%d)\n", error);
311 return error;
312 }
313
314 mtk_pmic_keys_lp_reset_setup(keys, mtk_pmic_regs->pmic_rst_reg);
315
316 platform_set_drvdata(pdev, keys);
317
318 return 0;
319}
320
321static struct platform_driver pmic_keys_pdrv = {
322 .probe = mtk_pmic_keys_probe,
323 .driver = {
324 .name = "mtk-pmic-keys",
325 .of_match_table = of_mtk_pmic_keys_match_tbl,
326 .pm = &mtk_pmic_keys_pm_ops,
327 },
328};
329
330module_platform_driver(pmic_keys_pdrv);
331
332MODULE_LICENSE("GPL v2");
333MODULE_AUTHOR("Chen Zhong <chen.zhong@mediatek.com>");
334MODULE_DESCRIPTION("MTK pmic-keys driver v0.1");