1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Description:  keypad driver for ADP5589, ADP5585
4  *		 I2C QWERTY Keypad and IO Expander
5  * Bugs: Enter bugs at http://blackfin.uclinux.org/
6  *
7  * Copyright (C) 2010-2011 Analog Devices Inc.
8  */
9 
10 #include <linux/bitops.h>
11 #include <linux/module.h>
12 #include <linux/interrupt.h>
13 #include <linux/irq.h>
14 #include <linux/workqueue.h>
15 #include <linux/errno.h>
16 #include <linux/pm.h>
17 #include <linux/pm_wakeirq.h>
18 #include <linux/platform_device.h>
19 #include <linux/input.h>
20 #include <linux/i2c.h>
21 #include <linux/gpio/driver.h>
22 #include <linux/slab.h>
23 
24 #include <linux/input/adp5589.h>
25 
26 /* ADP5589/ADP5585 Common Registers */
27 #define ADP5589_5_ID			0x00
28 #define ADP5589_5_INT_STATUS		0x01
29 #define ADP5589_5_STATUS		0x02
30 #define ADP5589_5_FIFO_1		0x03
31 #define ADP5589_5_FIFO_2		0x04
32 #define ADP5589_5_FIFO_3		0x05
33 #define ADP5589_5_FIFO_4		0x06
34 #define ADP5589_5_FIFO_5		0x07
35 #define ADP5589_5_FIFO_6		0x08
36 #define ADP5589_5_FIFO_7		0x09
37 #define ADP5589_5_FIFO_8		0x0A
38 #define ADP5589_5_FIFO_9		0x0B
39 #define ADP5589_5_FIFO_10		0x0C
40 #define ADP5589_5_FIFO_11		0x0D
41 #define ADP5589_5_FIFO_12		0x0E
42 #define ADP5589_5_FIFO_13		0x0F
43 #define ADP5589_5_FIFO_14		0x10
44 #define ADP5589_5_FIFO_15		0x11
45 #define ADP5589_5_FIFO_16		0x12
46 #define ADP5589_5_GPI_INT_STAT_A	0x13
47 #define ADP5589_5_GPI_INT_STAT_B	0x14
48 
49 /* ADP5589 Registers */
50 #define ADP5589_GPI_INT_STAT_C		0x15
51 #define ADP5589_GPI_STATUS_A		0x16
52 #define ADP5589_GPI_STATUS_B		0x17
53 #define ADP5589_GPI_STATUS_C		0x18
54 #define ADP5589_RPULL_CONFIG_A		0x19
55 #define ADP5589_RPULL_CONFIG_B		0x1A
56 #define ADP5589_RPULL_CONFIG_C		0x1B
57 #define ADP5589_RPULL_CONFIG_D		0x1C
58 #define ADP5589_RPULL_CONFIG_E		0x1D
59 #define ADP5589_GPI_INT_LEVEL_A		0x1E
60 #define ADP5589_GPI_INT_LEVEL_B		0x1F
61 #define ADP5589_GPI_INT_LEVEL_C		0x20
62 #define ADP5589_GPI_EVENT_EN_A		0x21
63 #define ADP5589_GPI_EVENT_EN_B		0x22
64 #define ADP5589_GPI_EVENT_EN_C		0x23
65 #define ADP5589_GPI_INTERRUPT_EN_A	0x24
66 #define ADP5589_GPI_INTERRUPT_EN_B	0x25
67 #define ADP5589_GPI_INTERRUPT_EN_C	0x26
68 #define ADP5589_DEBOUNCE_DIS_A		0x27
69 #define ADP5589_DEBOUNCE_DIS_B		0x28
70 #define ADP5589_DEBOUNCE_DIS_C		0x29
71 #define ADP5589_GPO_DATA_OUT_A		0x2A
72 #define ADP5589_GPO_DATA_OUT_B		0x2B
73 #define ADP5589_GPO_DATA_OUT_C		0x2C
74 #define ADP5589_GPO_OUT_MODE_A		0x2D
75 #define ADP5589_GPO_OUT_MODE_B		0x2E
76 #define ADP5589_GPO_OUT_MODE_C		0x2F
77 #define ADP5589_GPIO_DIRECTION_A	0x30
78 #define ADP5589_GPIO_DIRECTION_B	0x31
79 #define ADP5589_GPIO_DIRECTION_C	0x32
80 #define ADP5589_UNLOCK1			0x33
81 #define ADP5589_UNLOCK2			0x34
82 #define ADP5589_EXT_LOCK_EVENT		0x35
83 #define ADP5589_UNLOCK_TIMERS		0x36
84 #define ADP5589_LOCK_CFG		0x37
85 #define ADP5589_RESET1_EVENT_A		0x38
86 #define ADP5589_RESET1_EVENT_B		0x39
87 #define ADP5589_RESET1_EVENT_C		0x3A
88 #define ADP5589_RESET2_EVENT_A		0x3B
89 #define ADP5589_RESET2_EVENT_B		0x3C
90 #define ADP5589_RESET_CFG		0x3D
91 #define ADP5589_PWM_OFFT_LOW		0x3E
92 #define ADP5589_PWM_OFFT_HIGH		0x3F
93 #define ADP5589_PWM_ONT_LOW		0x40
94 #define ADP5589_PWM_ONT_HIGH		0x41
95 #define ADP5589_PWM_CFG			0x42
96 #define ADP5589_CLOCK_DIV_CFG		0x43
97 #define ADP5589_LOGIC_1_CFG		0x44
98 #define ADP5589_LOGIC_2_CFG		0x45
99 #define ADP5589_LOGIC_FF_CFG		0x46
100 #define ADP5589_LOGIC_INT_EVENT_EN	0x47
101 #define ADP5589_POLL_PTIME_CFG		0x48
102 #define ADP5589_PIN_CONFIG_A		0x49
103 #define ADP5589_PIN_CONFIG_B		0x4A
104 #define ADP5589_PIN_CONFIG_C		0x4B
105 #define ADP5589_PIN_CONFIG_D		0x4C
106 #define ADP5589_GENERAL_CFG		0x4D
107 #define ADP5589_INT_EN			0x4E
108 
109 /* ADP5585 Registers */
110 #define ADP5585_GPI_STATUS_A		0x15
111 #define ADP5585_GPI_STATUS_B		0x16
112 #define ADP5585_RPULL_CONFIG_A		0x17
113 #define ADP5585_RPULL_CONFIG_B		0x18
114 #define ADP5585_RPULL_CONFIG_C		0x19
115 #define ADP5585_RPULL_CONFIG_D		0x1A
116 #define ADP5585_GPI_INT_LEVEL_A		0x1B
117 #define ADP5585_GPI_INT_LEVEL_B		0x1C
118 #define ADP5585_GPI_EVENT_EN_A		0x1D
119 #define ADP5585_GPI_EVENT_EN_B		0x1E
120 #define ADP5585_GPI_INTERRUPT_EN_A	0x1F
121 #define ADP5585_GPI_INTERRUPT_EN_B	0x20
122 #define ADP5585_DEBOUNCE_DIS_A		0x21
123 #define ADP5585_DEBOUNCE_DIS_B		0x22
124 #define ADP5585_GPO_DATA_OUT_A		0x23
125 #define ADP5585_GPO_DATA_OUT_B		0x24
126 #define ADP5585_GPO_OUT_MODE_A		0x25
127 #define ADP5585_GPO_OUT_MODE_B		0x26
128 #define ADP5585_GPIO_DIRECTION_A	0x27
129 #define ADP5585_GPIO_DIRECTION_B	0x28
130 #define ADP5585_RESET1_EVENT_A		0x29
131 #define ADP5585_RESET1_EVENT_B		0x2A
132 #define ADP5585_RESET1_EVENT_C		0x2B
133 #define ADP5585_RESET2_EVENT_A		0x2C
134 #define ADP5585_RESET2_EVENT_B		0x2D
135 #define ADP5585_RESET_CFG		0x2E
136 #define ADP5585_PWM_OFFT_LOW		0x2F
137 #define ADP5585_PWM_OFFT_HIGH		0x30
138 #define ADP5585_PWM_ONT_LOW		0x31
139 #define ADP5585_PWM_ONT_HIGH		0x32
140 #define ADP5585_PWM_CFG			0x33
141 #define ADP5585_LOGIC_CFG		0x34
142 #define ADP5585_LOGIC_FF_CFG		0x35
143 #define ADP5585_LOGIC_INT_EVENT_EN	0x36
144 #define ADP5585_POLL_PTIME_CFG		0x37
145 #define ADP5585_PIN_CONFIG_A		0x38
146 #define ADP5585_PIN_CONFIG_B		0x39
147 #define ADP5585_PIN_CONFIG_D		0x3A
148 #define ADP5585_GENERAL_CFG		0x3B
149 #define ADP5585_INT_EN			0x3C
150 
151 /* ID Register */
152 #define ADP5589_5_DEVICE_ID_MASK	0xF
153 #define ADP5589_5_MAN_ID_MASK		0xF
154 #define ADP5589_5_MAN_ID_SHIFT		4
155 #define ADP5589_5_MAN_ID		0x02
156 
157 /* GENERAL_CFG Register */
158 #define OSC_EN		BIT(7)
159 #define CORE_CLK(x)	(((x) & 0x3) << 5)
160 #define LCK_TRK_LOGIC	BIT(4)		/* ADP5589 only */
161 #define LCK_TRK_GPI	BIT(3)		/* ADP5589 only */
162 #define INT_CFG		BIT(1)
163 #define RST_CFG		BIT(0)
164 
165 /* INT_EN Register */
166 #define LOGIC2_IEN	BIT(5)		/* ADP5589 only */
167 #define LOGIC1_IEN	BIT(4)
168 #define LOCK_IEN	BIT(3)		/* ADP5589 only */
169 #define OVRFLOW_IEN	BIT(2)
170 #define GPI_IEN		BIT(1)
171 #define EVENT_IEN	BIT(0)
172 
173 /* Interrupt Status Register */
174 #define LOGIC2_INT	BIT(5)		/* ADP5589 only */
175 #define LOGIC1_INT	BIT(4)
176 #define LOCK_INT	BIT(3)		/* ADP5589 only */
177 #define OVRFLOW_INT	BIT(2)
178 #define GPI_INT		BIT(1)
179 #define EVENT_INT	BIT(0)
180 
181 /* STATUS Register */
182 #define LOGIC2_STAT	BIT(7)		/* ADP5589 only */
183 #define LOGIC1_STAT	BIT(6)
184 #define LOCK_STAT	BIT(5)		/* ADP5589 only */
185 #define KEC		0x1F
186 
187 /* PIN_CONFIG_D Register */
188 #define C4_EXTEND_CFG	BIT(6)		/* RESET2 */
189 #define R4_EXTEND_CFG	BIT(5)		/* RESET1 */
190 
191 /* LOCK_CFG */
192 #define LOCK_EN		BIT(0)
193 
194 #define PTIME_MASK	0x3
195 #define LTIME_MASK	0x3		/* ADP5589 only */
196 
197 /* Key Event Register xy */
198 #define KEY_EV_PRESSED	BIT(7)
199 #define KEY_EV_MASK	0x7F
200 
201 #define KEYP_MAX_EVENT		16
202 #define ADP5589_MAXGPIO		19
203 #define ADP5585_MAXGPIO		11 /* 10 on the ADP5585-01, 11 on ADP5585-02 */
204 
205 enum {
206 	ADP5589,
207 	ADP5585_01,
208 	ADP5585_02
209 };
210 
211 struct adp_constants {
212 	u8 maxgpio;
213 	u8 keymapsize;
214 	u8 gpi_pin_row_base;
215 	u8 gpi_pin_row_end;
216 	u8 gpi_pin_col_base;
217 	u8 gpi_pin_base;
218 	u8 gpi_pin_end;
219 	u8 gpimapsize_max;
220 	u8 max_row_num;
221 	u8 max_col_num;
222 	u8 row_mask;
223 	u8 col_mask;
224 	u8 col_shift;
225 	u8 c4_extend_cfg;
226 	u8 (*bank) (u8 offset);
227 	u8 (*bit) (u8 offset);
228 	u8 (*reg) (u8 reg);
229 };
230 
231 struct adp5589_kpad {
232 	struct i2c_client *client;
233 	struct input_dev *input;
234 	const struct adp_constants *var;
235 	unsigned short keycode[ADP5589_KEYMAPSIZE];
236 	const struct adp5589_gpi_map *gpimap;
237 	unsigned short gpimapsize;
238 	unsigned extend_cfg;
239 	bool is_adp5585;
240 	bool support_row5;
241 #ifdef CONFIG_GPIOLIB
242 	unsigned char gpiomap[ADP5589_MAXGPIO];
243 	struct gpio_chip gc;
244 	struct mutex gpio_lock;	/* Protect cached dir, dat_out */
245 	u8 dat_out[3];
246 	u8 dir[3];
247 #endif
248 };
249 
250 /*
251  *  ADP5589 / ADP5585 derivative / variant handling
252  */
253 
254 
255 /* ADP5589 */
256 
257 static unsigned char adp5589_bank(unsigned char offset)
258 {
259 	return offset >> 3;
260 }
261 
262 static unsigned char adp5589_bit(unsigned char offset)
263 {
264 	return 1u << (offset & 0x7);
265 }
266 
267 static unsigned char adp5589_reg(unsigned char reg)
268 {
269 	return reg;
270 }
271 
272 static const struct adp_constants const_adp5589 = {
273 	.maxgpio		= ADP5589_MAXGPIO,
274 	.keymapsize		= ADP5589_KEYMAPSIZE,
275 	.gpi_pin_row_base	= ADP5589_GPI_PIN_ROW_BASE,
276 	.gpi_pin_row_end	= ADP5589_GPI_PIN_ROW_END,
277 	.gpi_pin_col_base	= ADP5589_GPI_PIN_COL_BASE,
278 	.gpi_pin_base		= ADP5589_GPI_PIN_BASE,
279 	.gpi_pin_end		= ADP5589_GPI_PIN_END,
280 	.gpimapsize_max		= ADP5589_GPIMAPSIZE_MAX,
281 	.c4_extend_cfg		= 12,
282 	.max_row_num		= ADP5589_MAX_ROW_NUM,
283 	.max_col_num		= ADP5589_MAX_COL_NUM,
284 	.row_mask		= ADP5589_ROW_MASK,
285 	.col_mask		= ADP5589_COL_MASK,
286 	.col_shift		= ADP5589_COL_SHIFT,
287 	.bank			= adp5589_bank,
288 	.bit			= adp5589_bit,
289 	.reg			= adp5589_reg,
290 };
291 
292 /* ADP5585 */
293 
294 static unsigned char adp5585_bank(unsigned char offset)
295 {
296 	return offset > ADP5585_MAX_ROW_NUM;
297 }
298 
299 static unsigned char adp5585_bit(unsigned char offset)
300 {
301 	return (offset > ADP5585_MAX_ROW_NUM) ?
302 		1u << (offset - ADP5585_COL_SHIFT) : 1u << offset;
303 }
304 
305 static const unsigned char adp5585_reg_lut[] = {
306 	[ADP5589_GPI_STATUS_A]		= ADP5585_GPI_STATUS_A,
307 	[ADP5589_GPI_STATUS_B]		= ADP5585_GPI_STATUS_B,
308 	[ADP5589_RPULL_CONFIG_A]	= ADP5585_RPULL_CONFIG_A,
309 	[ADP5589_RPULL_CONFIG_B]	= ADP5585_RPULL_CONFIG_B,
310 	[ADP5589_RPULL_CONFIG_C]	= ADP5585_RPULL_CONFIG_C,
311 	[ADP5589_RPULL_CONFIG_D]	= ADP5585_RPULL_CONFIG_D,
312 	[ADP5589_GPI_INT_LEVEL_A]	= ADP5585_GPI_INT_LEVEL_A,
313 	[ADP5589_GPI_INT_LEVEL_B]	= ADP5585_GPI_INT_LEVEL_B,
314 	[ADP5589_GPI_EVENT_EN_A]	= ADP5585_GPI_EVENT_EN_A,
315 	[ADP5589_GPI_EVENT_EN_B]	= ADP5585_GPI_EVENT_EN_B,
316 	[ADP5589_GPI_INTERRUPT_EN_A]	= ADP5585_GPI_INTERRUPT_EN_A,
317 	[ADP5589_GPI_INTERRUPT_EN_B]	= ADP5585_GPI_INTERRUPT_EN_B,
318 	[ADP5589_DEBOUNCE_DIS_A]	= ADP5585_DEBOUNCE_DIS_A,
319 	[ADP5589_DEBOUNCE_DIS_B]	= ADP5585_DEBOUNCE_DIS_B,
320 	[ADP5589_GPO_DATA_OUT_A]	= ADP5585_GPO_DATA_OUT_A,
321 	[ADP5589_GPO_DATA_OUT_B]	= ADP5585_GPO_DATA_OUT_B,
322 	[ADP5589_GPO_OUT_MODE_A]	= ADP5585_GPO_OUT_MODE_A,
323 	[ADP5589_GPO_OUT_MODE_B]	= ADP5585_GPO_OUT_MODE_B,
324 	[ADP5589_GPIO_DIRECTION_A]	= ADP5585_GPIO_DIRECTION_A,
325 	[ADP5589_GPIO_DIRECTION_B]	= ADP5585_GPIO_DIRECTION_B,
326 	[ADP5589_RESET1_EVENT_A]	= ADP5585_RESET1_EVENT_A,
327 	[ADP5589_RESET1_EVENT_B]	= ADP5585_RESET1_EVENT_B,
328 	[ADP5589_RESET1_EVENT_C]	= ADP5585_RESET1_EVENT_C,
329 	[ADP5589_RESET2_EVENT_A]	= ADP5585_RESET2_EVENT_A,
330 	[ADP5589_RESET2_EVENT_B]	= ADP5585_RESET2_EVENT_B,
331 	[ADP5589_RESET_CFG]		= ADP5585_RESET_CFG,
332 	[ADP5589_PWM_OFFT_LOW]		= ADP5585_PWM_OFFT_LOW,
333 	[ADP5589_PWM_OFFT_HIGH]		= ADP5585_PWM_OFFT_HIGH,
334 	[ADP5589_PWM_ONT_LOW]		= ADP5585_PWM_ONT_LOW,
335 	[ADP5589_PWM_ONT_HIGH]		= ADP5585_PWM_ONT_HIGH,
336 	[ADP5589_PWM_CFG]		= ADP5585_PWM_CFG,
337 	[ADP5589_LOGIC_1_CFG]		= ADP5585_LOGIC_CFG,
338 	[ADP5589_LOGIC_FF_CFG]		= ADP5585_LOGIC_FF_CFG,
339 	[ADP5589_LOGIC_INT_EVENT_EN]	= ADP5585_LOGIC_INT_EVENT_EN,
340 	[ADP5589_POLL_PTIME_CFG]	= ADP5585_POLL_PTIME_CFG,
341 	[ADP5589_PIN_CONFIG_A]		= ADP5585_PIN_CONFIG_A,
342 	[ADP5589_PIN_CONFIG_B]		= ADP5585_PIN_CONFIG_B,
343 	[ADP5589_PIN_CONFIG_D]		= ADP5585_PIN_CONFIG_D,
344 	[ADP5589_GENERAL_CFG]		= ADP5585_GENERAL_CFG,
345 	[ADP5589_INT_EN]		= ADP5585_INT_EN,
346 };
347 
348 static unsigned char adp5585_reg(unsigned char reg)
349 {
350 	return adp5585_reg_lut[reg];
351 }
352 
353 static const struct adp_constants const_adp5585 = {
354 	.maxgpio		= ADP5585_MAXGPIO,
355 	.keymapsize		= ADP5585_KEYMAPSIZE,
356 	.gpi_pin_row_base	= ADP5585_GPI_PIN_ROW_BASE,
357 	.gpi_pin_row_end	= ADP5585_GPI_PIN_ROW_END,
358 	.gpi_pin_col_base	= ADP5585_GPI_PIN_COL_BASE,
359 	.gpi_pin_base		= ADP5585_GPI_PIN_BASE,
360 	.gpi_pin_end		= ADP5585_GPI_PIN_END,
361 	.gpimapsize_max		= ADP5585_GPIMAPSIZE_MAX,
362 	.c4_extend_cfg		= 10,
363 	.max_row_num		= ADP5585_MAX_ROW_NUM,
364 	.max_col_num		= ADP5585_MAX_COL_NUM,
365 	.row_mask		= ADP5585_ROW_MASK,
366 	.col_mask		= ADP5585_COL_MASK,
367 	.col_shift		= ADP5585_COL_SHIFT,
368 	.bank			= adp5585_bank,
369 	.bit			= adp5585_bit,
370 	.reg			= adp5585_reg,
371 };
372 
373 static int adp5589_read(struct i2c_client *client, u8 reg)
374 {
375 	int ret = i2c_smbus_read_byte_data(client, reg);
376 
377 	if (ret < 0)
378 		dev_err(&client->dev, "Read Error\n");
379 
380 	return ret;
381 }
382 
383 static int adp5589_write(struct i2c_client *client, u8 reg, u8 val)
384 {
385 	return i2c_smbus_write_byte_data(client, reg, val);
386 }
387 
388 #ifdef CONFIG_GPIOLIB
389 static int adp5589_gpio_get_value(struct gpio_chip *chip, unsigned off)
390 {
391 	struct adp5589_kpad *kpad = gpiochip_get_data(chip);
392 	unsigned int bank = kpad->var->bank(kpad->gpiomap[off]);
393 	unsigned int bit = kpad->var->bit(kpad->gpiomap[off]);
394 
395 	return !!(adp5589_read(kpad->client,
396 			       kpad->var->reg(ADP5589_GPI_STATUS_A) + bank) &
397 			       bit);
398 }
399 
400 static void adp5589_gpio_set_value(struct gpio_chip *chip,
401 				   unsigned off, int val)
402 {
403 	struct adp5589_kpad *kpad = gpiochip_get_data(chip);
404 	unsigned int bank = kpad->var->bank(kpad->gpiomap[off]);
405 	unsigned int bit = kpad->var->bit(kpad->gpiomap[off]);
406 
407 	mutex_lock(&kpad->gpio_lock);
408 
409 	if (val)
410 		kpad->dat_out[bank] |= bit;
411 	else
412 		kpad->dat_out[bank] &= ~bit;
413 
414 	adp5589_write(kpad->client, kpad->var->reg(ADP5589_GPO_DATA_OUT_A) +
415 		      bank, kpad->dat_out[bank]);
416 
417 	mutex_unlock(&kpad->gpio_lock);
418 }
419 
420 static int adp5589_gpio_direction_input(struct gpio_chip *chip, unsigned off)
421 {
422 	struct adp5589_kpad *kpad = gpiochip_get_data(chip);
423 	unsigned int bank = kpad->var->bank(kpad->gpiomap[off]);
424 	unsigned int bit = kpad->var->bit(kpad->gpiomap[off]);
425 	int ret;
426 
427 	mutex_lock(&kpad->gpio_lock);
428 
429 	kpad->dir[bank] &= ~bit;
430 	ret = adp5589_write(kpad->client,
431 			    kpad->var->reg(ADP5589_GPIO_DIRECTION_A) + bank,
432 			    kpad->dir[bank]);
433 
434 	mutex_unlock(&kpad->gpio_lock);
435 
436 	return ret;
437 }
438 
439 static int adp5589_gpio_direction_output(struct gpio_chip *chip,
440 					 unsigned off, int val)
441 {
442 	struct adp5589_kpad *kpad = gpiochip_get_data(chip);
443 	unsigned int bank = kpad->var->bank(kpad->gpiomap[off]);
444 	unsigned int bit = kpad->var->bit(kpad->gpiomap[off]);
445 	int ret;
446 
447 	mutex_lock(&kpad->gpio_lock);
448 
449 	kpad->dir[bank] |= bit;
450 
451 	if (val)
452 		kpad->dat_out[bank] |= bit;
453 	else
454 		kpad->dat_out[bank] &= ~bit;
455 
456 	ret = adp5589_write(kpad->client, kpad->var->reg(ADP5589_GPO_DATA_OUT_A)
457 			    + bank, kpad->dat_out[bank]);
458 	ret |= adp5589_write(kpad->client,
459 			     kpad->var->reg(ADP5589_GPIO_DIRECTION_A) + bank,
460 			     kpad->dir[bank]);
461 
462 	mutex_unlock(&kpad->gpio_lock);
463 
464 	return ret;
465 }
466 
467 static int adp5589_build_gpiomap(struct adp5589_kpad *kpad,
468 				const struct adp5589_kpad_platform_data *pdata)
469 {
470 	bool pin_used[ADP5589_MAXGPIO];
471 	int n_unused = 0;
472 	int i;
473 
474 	memset(pin_used, false, sizeof(pin_used));
475 
476 	for (i = 0; i < kpad->var->maxgpio; i++)
477 		if (pdata->keypad_en_mask & BIT(i))
478 			pin_used[i] = true;
479 
480 	for (i = 0; i < kpad->gpimapsize; i++)
481 		pin_used[kpad->gpimap[i].pin - kpad->var->gpi_pin_base] = true;
482 
483 	if (kpad->extend_cfg & R4_EXTEND_CFG)
484 		pin_used[4] = true;
485 
486 	if (kpad->extend_cfg & C4_EXTEND_CFG)
487 		pin_used[kpad->var->c4_extend_cfg] = true;
488 
489 	if (!kpad->support_row5)
490 		pin_used[5] = true;
491 
492 	for (i = 0; i < kpad->var->maxgpio; i++)
493 		if (!pin_used[i])
494 			kpad->gpiomap[n_unused++] = i;
495 
496 	return n_unused;
497 }
498 
499 static int adp5589_gpio_add(struct adp5589_kpad *kpad)
500 {
501 	struct device *dev = &kpad->client->dev;
502 	const struct adp5589_kpad_platform_data *pdata = dev_get_platdata(dev);
503 	const struct adp5589_gpio_platform_data *gpio_data = pdata->gpio_data;
504 	int i, error;
505 
506 	if (!gpio_data)
507 		return 0;
508 
509 	kpad->gc.parent = dev;
510 	kpad->gc.ngpio = adp5589_build_gpiomap(kpad, pdata);
511 	if (kpad->gc.ngpio == 0) {
512 		dev_info(dev, "No unused gpios left to export\n");
513 		return 0;
514 	}
515 
516 	kpad->gc.direction_input = adp5589_gpio_direction_input;
517 	kpad->gc.direction_output = adp5589_gpio_direction_output;
518 	kpad->gc.get = adp5589_gpio_get_value;
519 	kpad->gc.set = adp5589_gpio_set_value;
520 	kpad->gc.can_sleep = 1;
521 
522 	kpad->gc.base = gpio_data->gpio_start;
523 	kpad->gc.label = kpad->client->name;
524 	kpad->gc.owner = THIS_MODULE;
525 
526 	mutex_init(&kpad->gpio_lock);
527 
528 	error = devm_gpiochip_add_data(dev, &kpad->gc, kpad);
529 	if (error)
530 		return error;
531 
532 	for (i = 0; i <= kpad->var->bank(kpad->var->maxgpio); i++) {
533 		kpad->dat_out[i] = adp5589_read(kpad->client, kpad->var->reg(
534 						ADP5589_GPO_DATA_OUT_A) + i);
535 		kpad->dir[i] = adp5589_read(kpad->client, kpad->var->reg(
536 					    ADP5589_GPIO_DIRECTION_A) + i);
537 	}
538 
539 	return 0;
540 }
541 #else
542 static inline int adp5589_gpio_add(struct adp5589_kpad *kpad)
543 {
544 	return 0;
545 }
546 #endif
547 
548 static void adp5589_report_switches(struct adp5589_kpad *kpad,
549 				    int key, int key_val)
550 {
551 	int i;
552 
553 	for (i = 0; i < kpad->gpimapsize; i++) {
554 		if (key_val == kpad->gpimap[i].pin) {
555 			input_report_switch(kpad->input,
556 					    kpad->gpimap[i].sw_evt,
557 					    key & KEY_EV_PRESSED);
558 			break;
559 		}
560 	}
561 }
562 
563 static void adp5589_report_events(struct adp5589_kpad *kpad, int ev_cnt)
564 {
565 	int i;
566 
567 	for (i = 0; i < ev_cnt; i++) {
568 		int key = adp5589_read(kpad->client, ADP5589_5_FIFO_1 + i);
569 		int key_val = key & KEY_EV_MASK;
570 
571 		if (key_val >= kpad->var->gpi_pin_base &&
572 		    key_val <= kpad->var->gpi_pin_end) {
573 			adp5589_report_switches(kpad, key, key_val);
574 		} else {
575 			input_report_key(kpad->input,
576 					 kpad->keycode[key_val - 1],
577 					 key & KEY_EV_PRESSED);
578 		}
579 	}
580 }
581 
582 static irqreturn_t adp5589_irq(int irq, void *handle)
583 {
584 	struct adp5589_kpad *kpad = handle;
585 	struct i2c_client *client = kpad->client;
586 	int status, ev_cnt;
587 
588 	status = adp5589_read(client, ADP5589_5_INT_STATUS);
589 
590 	if (status & OVRFLOW_INT)	/* Unlikely and should never happen */
591 		dev_err(&client->dev, "Event Overflow Error\n");
592 
593 	if (status & EVENT_INT) {
594 		ev_cnt = adp5589_read(client, ADP5589_5_STATUS) & KEC;
595 		if (ev_cnt) {
596 			adp5589_report_events(kpad, ev_cnt);
597 			input_sync(kpad->input);
598 		}
599 	}
600 
601 	adp5589_write(client, ADP5589_5_INT_STATUS, status); /* Status is W1C */
602 
603 	return IRQ_HANDLED;
604 }
605 
606 static int adp5589_get_evcode(struct adp5589_kpad *kpad, unsigned short key)
607 {
608 	int i;
609 
610 	for (i = 0; i < kpad->var->keymapsize; i++)
611 		if (key == kpad->keycode[i])
612 			return (i + 1) | KEY_EV_PRESSED;
613 
614 	dev_err(&kpad->client->dev, "RESET/UNLOCK key not in keycode map\n");
615 
616 	return -EINVAL;
617 }
618 
619 static int adp5589_setup(struct adp5589_kpad *kpad)
620 {
621 	struct i2c_client *client = kpad->client;
622 	const struct adp5589_kpad_platform_data *pdata =
623 		dev_get_platdata(&client->dev);
624 	u8 (*reg) (u8) = kpad->var->reg;
625 	unsigned char evt_mode1 = 0, evt_mode2 = 0, evt_mode3 = 0;
626 	unsigned char pull_mask = 0;
627 	int i, ret;
628 
629 	ret = adp5589_write(client, reg(ADP5589_PIN_CONFIG_A),
630 			    pdata->keypad_en_mask & kpad->var->row_mask);
631 	ret |= adp5589_write(client, reg(ADP5589_PIN_CONFIG_B),
632 			     (pdata->keypad_en_mask >> kpad->var->col_shift) &
633 			     kpad->var->col_mask);
634 
635 	if (!kpad->is_adp5585)
636 		ret |= adp5589_write(client, ADP5589_PIN_CONFIG_C,
637 				     (pdata->keypad_en_mask >> 16) & 0xFF);
638 
639 	if (!kpad->is_adp5585 && pdata->en_keylock) {
640 		ret |= adp5589_write(client, ADP5589_UNLOCK1,
641 				     pdata->unlock_key1);
642 		ret |= adp5589_write(client, ADP5589_UNLOCK2,
643 				     pdata->unlock_key2);
644 		ret |= adp5589_write(client, ADP5589_UNLOCK_TIMERS,
645 				     pdata->unlock_timer & LTIME_MASK);
646 		ret |= adp5589_write(client, ADP5589_LOCK_CFG, LOCK_EN);
647 	}
648 
649 	for (i = 0; i < KEYP_MAX_EVENT; i++)
650 		ret |= adp5589_read(client, ADP5589_5_FIFO_1 + i);
651 
652 	for (i = 0; i < pdata->gpimapsize; i++) {
653 		unsigned short pin = pdata->gpimap[i].pin;
654 
655 		if (pin <= kpad->var->gpi_pin_row_end) {
656 			evt_mode1 |= BIT(pin - kpad->var->gpi_pin_row_base);
657 		} else {
658 			evt_mode2 |=
659 			    BIT(pin - kpad->var->gpi_pin_col_base) & 0xFF;
660 			if (!kpad->is_adp5585)
661 				evt_mode3 |=
662 				    BIT(pin - kpad->var->gpi_pin_col_base) >> 8;
663 		}
664 	}
665 
666 	if (pdata->gpimapsize) {
667 		ret |= adp5589_write(client, reg(ADP5589_GPI_EVENT_EN_A),
668 				     evt_mode1);
669 		ret |= adp5589_write(client, reg(ADP5589_GPI_EVENT_EN_B),
670 				     evt_mode2);
671 		if (!kpad->is_adp5585)
672 			ret |= adp5589_write(client,
673 					     reg(ADP5589_GPI_EVENT_EN_C),
674 					     evt_mode3);
675 	}
676 
677 	if (pdata->pull_dis_mask & pdata->pullup_en_100k &
678 		pdata->pullup_en_300k & pdata->pulldown_en_300k)
679 		dev_warn(&client->dev, "Conflicting pull resistor config\n");
680 
681 	for (i = 0; i <= kpad->var->max_row_num; i++) {
682 		unsigned int val = 0, bit = BIT(i);
683 		if (pdata->pullup_en_300k & bit)
684 			val = 0;
685 		else if (pdata->pulldown_en_300k & bit)
686 			val = 1;
687 		else if (pdata->pullup_en_100k & bit)
688 			val = 2;
689 		else if (pdata->pull_dis_mask & bit)
690 			val = 3;
691 
692 		pull_mask |= val << (2 * (i & 0x3));
693 
694 		if (i % 4 == 3 || i == kpad->var->max_row_num) {
695 			ret |= adp5589_write(client, reg(ADP5585_RPULL_CONFIG_A)
696 					     + (i >> 2), pull_mask);
697 			pull_mask = 0;
698 		}
699 	}
700 
701 	for (i = 0; i <= kpad->var->max_col_num; i++) {
702 		unsigned int val = 0, bit = BIT(i + kpad->var->col_shift);
703 		if (pdata->pullup_en_300k & bit)
704 			val = 0;
705 		else if (pdata->pulldown_en_300k & bit)
706 			val = 1;
707 		else if (pdata->pullup_en_100k & bit)
708 			val = 2;
709 		else if (pdata->pull_dis_mask & bit)
710 			val = 3;
711 
712 		pull_mask |= val << (2 * (i & 0x3));
713 
714 		if (i % 4 == 3 || i == kpad->var->max_col_num) {
715 			ret |= adp5589_write(client,
716 					     reg(ADP5585_RPULL_CONFIG_C) +
717 					     (i >> 2), pull_mask);
718 			pull_mask = 0;
719 		}
720 	}
721 
722 	if (pdata->reset1_key_1 && pdata->reset1_key_2 && pdata->reset1_key_3) {
723 		ret |= adp5589_write(client, reg(ADP5589_RESET1_EVENT_A),
724 				     adp5589_get_evcode(kpad,
725 							pdata->reset1_key_1));
726 		ret |= adp5589_write(client, reg(ADP5589_RESET1_EVENT_B),
727 				     adp5589_get_evcode(kpad,
728 							pdata->reset1_key_2));
729 		ret |= adp5589_write(client, reg(ADP5589_RESET1_EVENT_C),
730 				     adp5589_get_evcode(kpad,
731 							pdata->reset1_key_3));
732 		kpad->extend_cfg |= R4_EXTEND_CFG;
733 	}
734 
735 	if (pdata->reset2_key_1 && pdata->reset2_key_2) {
736 		ret |= adp5589_write(client, reg(ADP5589_RESET2_EVENT_A),
737 				     adp5589_get_evcode(kpad,
738 							pdata->reset2_key_1));
739 		ret |= adp5589_write(client, reg(ADP5589_RESET2_EVENT_B),
740 				     adp5589_get_evcode(kpad,
741 							pdata->reset2_key_2));
742 		kpad->extend_cfg |= C4_EXTEND_CFG;
743 	}
744 
745 	if (kpad->extend_cfg) {
746 		ret |= adp5589_write(client, reg(ADP5589_RESET_CFG),
747 				     pdata->reset_cfg);
748 		ret |= adp5589_write(client, reg(ADP5589_PIN_CONFIG_D),
749 				     kpad->extend_cfg);
750 	}
751 
752 	ret |= adp5589_write(client, reg(ADP5589_DEBOUNCE_DIS_A),
753 			    pdata->debounce_dis_mask & kpad->var->row_mask);
754 
755 	ret |= adp5589_write(client, reg(ADP5589_DEBOUNCE_DIS_B),
756 			     (pdata->debounce_dis_mask >> kpad->var->col_shift)
757 			     & kpad->var->col_mask);
758 
759 	if (!kpad->is_adp5585)
760 		ret |= adp5589_write(client, reg(ADP5589_DEBOUNCE_DIS_C),
761 				     (pdata->debounce_dis_mask >> 16) & 0xFF);
762 
763 	ret |= adp5589_write(client, reg(ADP5589_POLL_PTIME_CFG),
764 			     pdata->scan_cycle_time & PTIME_MASK);
765 	ret |= adp5589_write(client, ADP5589_5_INT_STATUS,
766 			     (kpad->is_adp5585 ? 0 : LOGIC2_INT) |
767 			     LOGIC1_INT | OVRFLOW_INT |
768 			     (kpad->is_adp5585 ? 0 : LOCK_INT) |
769 			     GPI_INT | EVENT_INT);	/* Status is W1C */
770 
771 	ret |= adp5589_write(client, reg(ADP5589_GENERAL_CFG),
772 			     INT_CFG | OSC_EN | CORE_CLK(3));
773 	ret |= adp5589_write(client, reg(ADP5589_INT_EN),
774 			     OVRFLOW_IEN | GPI_IEN | EVENT_IEN);
775 
776 	if (ret < 0) {
777 		dev_err(&client->dev, "Write Error\n");
778 		return ret;
779 	}
780 
781 	return 0;
782 }
783 
784 static void adp5589_report_switch_state(struct adp5589_kpad *kpad)
785 {
786 	int gpi_stat_tmp, pin_loc;
787 	int i;
788 	int gpi_stat1 = adp5589_read(kpad->client,
789 				     kpad->var->reg(ADP5589_GPI_STATUS_A));
790 	int gpi_stat2 = adp5589_read(kpad->client,
791 				     kpad->var->reg(ADP5589_GPI_STATUS_B));
792 	int gpi_stat3 = !kpad->is_adp5585 ?
793 			adp5589_read(kpad->client, ADP5589_GPI_STATUS_C) : 0;
794 
795 	for (i = 0; i < kpad->gpimapsize; i++) {
796 		unsigned short pin = kpad->gpimap[i].pin;
797 
798 		if (pin <= kpad->var->gpi_pin_row_end) {
799 			gpi_stat_tmp = gpi_stat1;
800 			pin_loc = pin - kpad->var->gpi_pin_row_base;
801 		} else if ((pin - kpad->var->gpi_pin_col_base) < 8) {
802 			gpi_stat_tmp = gpi_stat2;
803 			pin_loc = pin - kpad->var->gpi_pin_col_base;
804 		} else {
805 			gpi_stat_tmp = gpi_stat3;
806 			pin_loc = pin - kpad->var->gpi_pin_col_base - 8;
807 		}
808 
809 		if (gpi_stat_tmp < 0) {
810 			dev_err(&kpad->client->dev,
811 				"Can't read GPIO_DAT_STAT switch %d, default to OFF\n",
812 				pin);
813 			gpi_stat_tmp = 0;
814 		}
815 
816 		input_report_switch(kpad->input,
817 				    kpad->gpimap[i].sw_evt,
818 				    !(gpi_stat_tmp & BIT(pin_loc)));
819 	}
820 
821 	input_sync(kpad->input);
822 }
823 
824 static int adp5589_keypad_add(struct adp5589_kpad *kpad, unsigned int revid)
825 {
826 	struct i2c_client *client = kpad->client;
827 	const struct adp5589_kpad_platform_data *pdata =
828 		dev_get_platdata(&client->dev);
829 	struct input_dev *input;
830 	unsigned int i;
831 	int error;
832 
833 	if (!((pdata->keypad_en_mask & kpad->var->row_mask) &&
834 			(pdata->keypad_en_mask >> kpad->var->col_shift)) ||
835 			!pdata->keymap) {
836 		dev_err(&client->dev, "no rows, cols or keymap from pdata\n");
837 		return -EINVAL;
838 	}
839 
840 	if (pdata->keymapsize != kpad->var->keymapsize) {
841 		dev_err(&client->dev, "invalid keymapsize\n");
842 		return -EINVAL;
843 	}
844 
845 	if (!pdata->gpimap && pdata->gpimapsize) {
846 		dev_err(&client->dev, "invalid gpimap from pdata\n");
847 		return -EINVAL;
848 	}
849 
850 	if (pdata->gpimapsize > kpad->var->gpimapsize_max) {
851 		dev_err(&client->dev, "invalid gpimapsize\n");
852 		return -EINVAL;
853 	}
854 
855 	for (i = 0; i < pdata->gpimapsize; i++) {
856 		unsigned short pin = pdata->gpimap[i].pin;
857 
858 		if (pin < kpad->var->gpi_pin_base ||
859 				pin > kpad->var->gpi_pin_end) {
860 			dev_err(&client->dev, "invalid gpi pin data\n");
861 			return -EINVAL;
862 		}
863 
864 		if (BIT(pin - kpad->var->gpi_pin_row_base) &
865 				pdata->keypad_en_mask) {
866 			dev_err(&client->dev, "invalid gpi row/col data\n");
867 			return -EINVAL;
868 		}
869 	}
870 
871 	if (!client->irq) {
872 		dev_err(&client->dev, "no IRQ?\n");
873 		return -EINVAL;
874 	}
875 
876 	input = devm_input_allocate_device(&client->dev);
877 	if (!input)
878 		return -ENOMEM;
879 
880 	kpad->input = input;
881 
882 	input->name = client->name;
883 	input->phys = "adp5589-keys/input0";
884 	input->dev.parent = &client->dev;
885 
886 	input_set_drvdata(input, kpad);
887 
888 	input->id.bustype = BUS_I2C;
889 	input->id.vendor = 0x0001;
890 	input->id.product = 0x0001;
891 	input->id.version = revid;
892 
893 	input->keycodesize = sizeof(kpad->keycode[0]);
894 	input->keycodemax = pdata->keymapsize;
895 	input->keycode = kpad->keycode;
896 
897 	memcpy(kpad->keycode, pdata->keymap,
898 	       pdata->keymapsize * input->keycodesize);
899 
900 	kpad->gpimap = pdata->gpimap;
901 	kpad->gpimapsize = pdata->gpimapsize;
902 
903 	/* setup input device */
904 	__set_bit(EV_KEY, input->evbit);
905 
906 	if (pdata->repeat)
907 		__set_bit(EV_REP, input->evbit);
908 
909 	for (i = 0; i < input->keycodemax; i++)
910 		if (kpad->keycode[i] <= KEY_MAX)
911 			__set_bit(kpad->keycode[i], input->keybit);
912 	__clear_bit(KEY_RESERVED, input->keybit);
913 
914 	if (kpad->gpimapsize)
915 		__set_bit(EV_SW, input->evbit);
916 	for (i = 0; i < kpad->gpimapsize; i++)
917 		__set_bit(kpad->gpimap[i].sw_evt, input->swbit);
918 
919 	error = input_register_device(input);
920 	if (error) {
921 		dev_err(&client->dev, "unable to register input device\n");
922 		return error;
923 	}
924 
925 	error = devm_request_threaded_irq(&client->dev, client->irq,
926 					  NULL, adp5589_irq,
927 					  IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
928 					  client->dev.driver->name, kpad);
929 	if (error) {
930 		dev_err(&client->dev, "unable to request irq %d\n", client->irq);
931 		return error;
932 	}
933 
934 	return 0;
935 }
936 
937 static void adp5589_clear_config(void *data)
938 {
939 	struct i2c_client *client = data;
940 	struct adp5589_kpad *kpad = i2c_get_clientdata(client);
941 
942 	adp5589_write(client, kpad->var->reg(ADP5589_GENERAL_CFG), 0);
943 }
944 
945 static int adp5589_probe(struct i2c_client *client)
946 {
947 	const struct i2c_device_id *id = i2c_client_get_device_id(client);
948 	struct adp5589_kpad *kpad;
949 	const struct adp5589_kpad_platform_data *pdata =
950 		dev_get_platdata(&client->dev);
951 	unsigned int revid;
952 	int error, ret;
953 
954 	if (!i2c_check_functionality(client->adapter,
955 				     I2C_FUNC_SMBUS_BYTE_DATA)) {
956 		dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
957 		return -EIO;
958 	}
959 
960 	if (!pdata) {
961 		dev_err(&client->dev, "no platform data?\n");
962 		return -EINVAL;
963 	}
964 
965 	kpad = devm_kzalloc(&client->dev, sizeof(*kpad), GFP_KERNEL);
966 	if (!kpad)
967 		return -ENOMEM;
968 
969 	kpad->client = client;
970 
971 	switch (id->driver_data) {
972 	case ADP5585_02:
973 		kpad->support_row5 = true;
974 		fallthrough;
975 	case ADP5585_01:
976 		kpad->is_adp5585 = true;
977 		kpad->var = &const_adp5585;
978 		break;
979 	case ADP5589:
980 		kpad->support_row5 = true;
981 		kpad->var = &const_adp5589;
982 		break;
983 	}
984 
985 	error = devm_add_action_or_reset(&client->dev, adp5589_clear_config,
986 					 client);
987 	if (error)
988 		return error;
989 
990 	ret = adp5589_read(client, ADP5589_5_ID);
991 	if (ret < 0)
992 		return ret;
993 
994 	revid = (u8) ret & ADP5589_5_DEVICE_ID_MASK;
995 
996 	if (pdata->keymapsize) {
997 		error = adp5589_keypad_add(kpad, revid);
998 		if (error)
999 			return error;
1000 	}
1001 
1002 	error = adp5589_setup(kpad);
1003 	if (error)
1004 		return error;
1005 
1006 	if (kpad->gpimapsize)
1007 		adp5589_report_switch_state(kpad);
1008 
1009 	error = adp5589_gpio_add(kpad);
1010 	if (error)
1011 		return error;
1012 
1013 	i2c_set_clientdata(client, kpad);
1014 
1015 	dev_info(&client->dev, "Rev.%d keypad, irq %d\n", revid, client->irq);
1016 	return 0;
1017 }
1018 
1019 static int adp5589_suspend(struct device *dev)
1020 {
1021 	struct i2c_client *client = to_i2c_client(dev);
1022 	struct adp5589_kpad *kpad = i2c_get_clientdata(client);
1023 
1024 	if (kpad->input)
1025 		disable_irq(client->irq);
1026 
1027 	return 0;
1028 }
1029 
1030 static int adp5589_resume(struct device *dev)
1031 {
1032 	struct i2c_client *client = to_i2c_client(dev);
1033 	struct adp5589_kpad *kpad = i2c_get_clientdata(client);
1034 
1035 	if (kpad->input)
1036 		enable_irq(client->irq);
1037 
1038 	return 0;
1039 }
1040 
1041 static DEFINE_SIMPLE_DEV_PM_OPS(adp5589_dev_pm_ops, adp5589_suspend, adp5589_resume);
1042 
1043 static const struct i2c_device_id adp5589_id[] = {
1044 	{"adp5589-keys", ADP5589},
1045 	{"adp5585-keys", ADP5585_01},
1046 	{"adp5585-02-keys", ADP5585_02}, /* Adds ROW5 to ADP5585 */
1047 	{}
1048 };
1049 
1050 MODULE_DEVICE_TABLE(i2c, adp5589_id);
1051 
1052 static struct i2c_driver adp5589_driver = {
1053 	.driver = {
1054 		.name = KBUILD_MODNAME,
1055 		.pm = pm_sleep_ptr(&adp5589_dev_pm_ops),
1056 	},
1057 	.probe_new = adp5589_probe,
1058 	.id_table = adp5589_id,
1059 };
1060 
1061 module_i2c_driver(adp5589_driver);
1062 
1063 MODULE_LICENSE("GPL");
1064 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
1065 MODULE_DESCRIPTION("ADP5589/ADP5585 Keypad driver");
1066