1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2012-2014, 2016-2021 The Linux Foundation. All rights reserved.
4  * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
5  */
6 
7 #include <linux/gpio/driver.h>
8 #include <linux/interrupt.h>
9 #include <linux/module.h>
10 #include <linux/of.h>
11 #include <linux/of_irq.h>
12 #include <linux/platform_device.h>
13 #include <linux/regmap.h>
14 #include <linux/seq_file.h>
15 #include <linux/slab.h>
16 #include <linux/spmi.h>
17 #include <linux/types.h>
18 
19 #include <linux/pinctrl/pinconf-generic.h>
20 #include <linux/pinctrl/pinconf.h>
21 #include <linux/pinctrl/pinmux.h>
22 
23 #include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
24 
25 #include "../core.h"
26 #include "../pinctrl-utils.h"
27 
28 #define PMIC_GPIO_ADDRESS_RANGE			0x100
29 
30 /* type and subtype registers base address offsets */
31 #define PMIC_GPIO_REG_TYPE			0x4
32 #define PMIC_GPIO_REG_SUBTYPE			0x5
33 
34 /* GPIO peripheral type and subtype out_values */
35 #define PMIC_GPIO_TYPE				0x10
36 #define PMIC_GPIO_SUBTYPE_GPIO_4CH		0x1
37 #define PMIC_GPIO_SUBTYPE_GPIOC_4CH		0x5
38 #define PMIC_GPIO_SUBTYPE_GPIO_8CH		0x9
39 #define PMIC_GPIO_SUBTYPE_GPIOC_8CH		0xd
40 #define PMIC_GPIO_SUBTYPE_GPIO_LV		0x10
41 #define PMIC_GPIO_SUBTYPE_GPIO_MV		0x11
42 #define PMIC_GPIO_SUBTYPE_GPIO_LV_VIN2		0x12
43 #define PMIC_GPIO_SUBTYPE_GPIO_MV_VIN3		0x13
44 
45 #define PMIC_MPP_REG_RT_STS			0x10
46 #define PMIC_MPP_REG_RT_STS_VAL_MASK		0x1
47 
48 /* control register base address offsets */
49 #define PMIC_GPIO_REG_MODE_CTL			0x40
50 #define PMIC_GPIO_REG_DIG_VIN_CTL		0x41
51 #define PMIC_GPIO_REG_DIG_PULL_CTL		0x42
52 #define PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL	0x44
53 #define PMIC_GPIO_REG_DIG_IN_CTL		0x43
54 #define PMIC_GPIO_REG_DIG_OUT_CTL		0x45
55 #define PMIC_GPIO_REG_EN_CTL			0x46
56 #define PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL	0x4A
57 
58 /* PMIC_GPIO_REG_MODE_CTL */
59 #define PMIC_GPIO_REG_MODE_VALUE_SHIFT		0x1
60 #define PMIC_GPIO_REG_MODE_FUNCTION_SHIFT	1
61 #define PMIC_GPIO_REG_MODE_FUNCTION_MASK	0x7
62 #define PMIC_GPIO_REG_MODE_DIR_SHIFT		4
63 #define PMIC_GPIO_REG_MODE_DIR_MASK		0x7
64 
65 #define PMIC_GPIO_MODE_DIGITAL_INPUT		0
66 #define PMIC_GPIO_MODE_DIGITAL_OUTPUT		1
67 #define PMIC_GPIO_MODE_DIGITAL_INPUT_OUTPUT	2
68 #define PMIC_GPIO_MODE_ANALOG_PASS_THRU		3
69 #define PMIC_GPIO_REG_LV_MV_MODE_DIR_MASK	0x3
70 
71 /* PMIC_GPIO_REG_DIG_VIN_CTL */
72 #define PMIC_GPIO_REG_VIN_SHIFT			0
73 #define PMIC_GPIO_REG_VIN_MASK			0x7
74 
75 /* PMIC_GPIO_REG_DIG_PULL_CTL */
76 #define PMIC_GPIO_REG_PULL_SHIFT		0
77 #define PMIC_GPIO_REG_PULL_MASK			0x7
78 
79 #define PMIC_GPIO_PULL_DOWN			4
80 #define PMIC_GPIO_PULL_DISABLE			5
81 
82 /* PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL for LV/MV */
83 #define PMIC_GPIO_LV_MV_OUTPUT_INVERT		0x80
84 #define PMIC_GPIO_LV_MV_OUTPUT_INVERT_SHIFT	7
85 #define PMIC_GPIO_LV_MV_OUTPUT_SOURCE_SEL_MASK	0xF
86 
87 /* PMIC_GPIO_REG_DIG_IN_CTL */
88 #define PMIC_GPIO_LV_MV_DIG_IN_DTEST_EN		0x80
89 #define PMIC_GPIO_LV_MV_DIG_IN_DTEST_SEL_MASK	0x7
90 #define PMIC_GPIO_DIG_IN_DTEST_SEL_MASK		0xf
91 
92 /* PMIC_GPIO_REG_DIG_OUT_CTL */
93 #define PMIC_GPIO_REG_OUT_STRENGTH_SHIFT	0
94 #define PMIC_GPIO_REG_OUT_STRENGTH_MASK		0x3
95 #define PMIC_GPIO_REG_OUT_TYPE_SHIFT		4
96 #define PMIC_GPIO_REG_OUT_TYPE_MASK		0x3
97 
98 /*
99  * Output type - indicates pin should be configured as push-pull,
100  * open drain or open source.
101  */
102 #define PMIC_GPIO_OUT_BUF_CMOS			0
103 #define PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS	1
104 #define PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS	2
105 
106 #define PMIC_GPIO_OUT_STRENGTH_LOW		1
107 #define PMIC_GPIO_OUT_STRENGTH_HIGH		3
108 
109 /* PMIC_GPIO_REG_EN_CTL */
110 #define PMIC_GPIO_REG_MASTER_EN_SHIFT		7
111 
112 #define PMIC_GPIO_PHYSICAL_OFFSET		1
113 
114 /* PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL */
115 #define PMIC_GPIO_LV_MV_ANA_MUX_SEL_MASK		0x3
116 
117 /* Qualcomm specific pin configurations */
118 #define PMIC_GPIO_CONF_PULL_UP			(PIN_CONFIG_END + 1)
119 #define PMIC_GPIO_CONF_STRENGTH			(PIN_CONFIG_END + 2)
120 #define PMIC_GPIO_CONF_ATEST			(PIN_CONFIG_END + 3)
121 #define PMIC_GPIO_CONF_ANALOG_PASS		(PIN_CONFIG_END + 4)
122 #define PMIC_GPIO_CONF_DTEST_BUFFER		(PIN_CONFIG_END + 5)
123 
124 /* The index of each function in pmic_gpio_functions[] array */
125 enum pmic_gpio_func_index {
126 	PMIC_GPIO_FUNC_INDEX_NORMAL,
127 	PMIC_GPIO_FUNC_INDEX_PAIRED,
128 	PMIC_GPIO_FUNC_INDEX_FUNC1,
129 	PMIC_GPIO_FUNC_INDEX_FUNC2,
130 	PMIC_GPIO_FUNC_INDEX_FUNC3,
131 	PMIC_GPIO_FUNC_INDEX_FUNC4,
132 	PMIC_GPIO_FUNC_INDEX_DTEST1,
133 	PMIC_GPIO_FUNC_INDEX_DTEST2,
134 	PMIC_GPIO_FUNC_INDEX_DTEST3,
135 	PMIC_GPIO_FUNC_INDEX_DTEST4,
136 };
137 
138 /**
139  * struct pmic_gpio_pad - keep current GPIO settings
140  * @base: Address base in SPMI device.
141  * @is_enabled: Set to false when GPIO should be put in high Z state.
142  * @out_value: Cached pin output value
143  * @have_buffer: Set to true if GPIO output could be configured in push-pull,
144  *	open-drain or open-source mode.
145  * @output_enabled: Set to true if GPIO output logic is enabled.
146  * @input_enabled: Set to true if GPIO input buffer logic is enabled.
147  * @analog_pass: Set to true if GPIO is in analog-pass-through mode.
148  * @lv_mv_type: Set to true if GPIO subtype is GPIO_LV(0x10) or GPIO_MV(0x11).
149  * @num_sources: Number of power-sources supported by this GPIO.
150  * @power_source: Current power-source used.
151  * @buffer_type: Push-pull, open-drain or open-source.
152  * @pullup: Constant current which flow trough GPIO output buffer.
153  * @strength: No, Low, Medium, High
154  * @function: See pmic_gpio_functions[]
155  * @atest: the ATEST selection for GPIO analog-pass-through mode
156  * @dtest_buffer: the DTEST buffer selection for digital input mode.
157  */
158 struct pmic_gpio_pad {
159 	u16		base;
160 	bool		is_enabled;
161 	bool		out_value;
162 	bool		have_buffer;
163 	bool		output_enabled;
164 	bool		input_enabled;
165 	bool		analog_pass;
166 	bool		lv_mv_type;
167 	unsigned int	num_sources;
168 	unsigned int	power_source;
169 	unsigned int	buffer_type;
170 	unsigned int	pullup;
171 	unsigned int	strength;
172 	unsigned int	function;
173 	unsigned int	atest;
174 	unsigned int	dtest_buffer;
175 };
176 
177 struct pmic_gpio_state {
178 	struct device	*dev;
179 	struct regmap	*map;
180 	struct pinctrl_dev *ctrl;
181 	struct gpio_chip chip;
182 	u8 usid;
183 	u8 pid_base;
184 };
185 
186 static const struct pinconf_generic_params pmic_gpio_bindings[] = {
187 	{"qcom,pull-up-strength",	PMIC_GPIO_CONF_PULL_UP,		0},
188 	{"qcom,drive-strength",		PMIC_GPIO_CONF_STRENGTH,	0},
189 	{"qcom,atest",			PMIC_GPIO_CONF_ATEST,		0},
190 	{"qcom,analog-pass",		PMIC_GPIO_CONF_ANALOG_PASS,	0},
191 	{"qcom,dtest-buffer",           PMIC_GPIO_CONF_DTEST_BUFFER,    0},
192 };
193 
194 #ifdef CONFIG_DEBUG_FS
195 static const struct pin_config_item pmic_conf_items[ARRAY_SIZE(pmic_gpio_bindings)] = {
196 	PCONFDUMP(PMIC_GPIO_CONF_PULL_UP,  "pull up strength", NULL, true),
197 	PCONFDUMP(PMIC_GPIO_CONF_STRENGTH, "drive-strength", NULL, true),
198 	PCONFDUMP(PMIC_GPIO_CONF_ATEST, "atest", NULL, true),
199 	PCONFDUMP(PMIC_GPIO_CONF_ANALOG_PASS, "analog-pass", NULL, true),
200 	PCONFDUMP(PMIC_GPIO_CONF_DTEST_BUFFER, "dtest-buffer", NULL, true),
201 };
202 #endif
203 
204 static const char *const pmic_gpio_groups[] = {
205 	"gpio1", "gpio2", "gpio3", "gpio4", "gpio5", "gpio6", "gpio7", "gpio8",
206 	"gpio9", "gpio10", "gpio11", "gpio12", "gpio13", "gpio14", "gpio15",
207 	"gpio16", "gpio17", "gpio18", "gpio19", "gpio20", "gpio21", "gpio22",
208 	"gpio23", "gpio24", "gpio25", "gpio26", "gpio27", "gpio28", "gpio29",
209 	"gpio30", "gpio31", "gpio32", "gpio33", "gpio34", "gpio35", "gpio36",
210 };
211 
212 static const char *const pmic_gpio_functions[] = {
213 	[PMIC_GPIO_FUNC_INDEX_NORMAL]	= PMIC_GPIO_FUNC_NORMAL,
214 	[PMIC_GPIO_FUNC_INDEX_PAIRED]	= PMIC_GPIO_FUNC_PAIRED,
215 	[PMIC_GPIO_FUNC_INDEX_FUNC1]	= PMIC_GPIO_FUNC_FUNC1,
216 	[PMIC_GPIO_FUNC_INDEX_FUNC2]	= PMIC_GPIO_FUNC_FUNC2,
217 	[PMIC_GPIO_FUNC_INDEX_FUNC3]	= PMIC_GPIO_FUNC_FUNC3,
218 	[PMIC_GPIO_FUNC_INDEX_FUNC4]	= PMIC_GPIO_FUNC_FUNC4,
219 	[PMIC_GPIO_FUNC_INDEX_DTEST1]	= PMIC_GPIO_FUNC_DTEST1,
220 	[PMIC_GPIO_FUNC_INDEX_DTEST2]	= PMIC_GPIO_FUNC_DTEST2,
221 	[PMIC_GPIO_FUNC_INDEX_DTEST3]	= PMIC_GPIO_FUNC_DTEST3,
222 	[PMIC_GPIO_FUNC_INDEX_DTEST4]	= PMIC_GPIO_FUNC_DTEST4,
223 };
224 
225 static int pmic_gpio_read(struct pmic_gpio_state *state,
226 			  struct pmic_gpio_pad *pad, unsigned int addr)
227 {
228 	unsigned int val;
229 	int ret;
230 
231 	ret = regmap_read(state->map, pad->base + addr, &val);
232 	if (ret < 0)
233 		dev_err(state->dev, "read 0x%x failed\n", addr);
234 	else
235 		ret = val;
236 
237 	return ret;
238 }
239 
240 static int pmic_gpio_write(struct pmic_gpio_state *state,
241 			   struct pmic_gpio_pad *pad, unsigned int addr,
242 			   unsigned int val)
243 {
244 	int ret;
245 
246 	ret = regmap_write(state->map, pad->base + addr, val);
247 	if (ret < 0)
248 		dev_err(state->dev, "write 0x%x failed\n", addr);
249 
250 	return ret;
251 }
252 
253 static int pmic_gpio_get_groups_count(struct pinctrl_dev *pctldev)
254 {
255 	/* Every PIN is a group */
256 	return pctldev->desc->npins;
257 }
258 
259 static const char *pmic_gpio_get_group_name(struct pinctrl_dev *pctldev,
260 					    unsigned pin)
261 {
262 	return pctldev->desc->pins[pin].name;
263 }
264 
265 static int pmic_gpio_get_group_pins(struct pinctrl_dev *pctldev, unsigned pin,
266 				    const unsigned **pins, unsigned *num_pins)
267 {
268 	*pins = &pctldev->desc->pins[pin].number;
269 	*num_pins = 1;
270 	return 0;
271 }
272 
273 static const struct pinctrl_ops pmic_gpio_pinctrl_ops = {
274 	.get_groups_count	= pmic_gpio_get_groups_count,
275 	.get_group_name		= pmic_gpio_get_group_name,
276 	.get_group_pins		= pmic_gpio_get_group_pins,
277 	.dt_node_to_map		= pinconf_generic_dt_node_to_map_group,
278 	.dt_free_map		= pinctrl_utils_free_map,
279 };
280 
281 static int pmic_gpio_get_functions_count(struct pinctrl_dev *pctldev)
282 {
283 	return ARRAY_SIZE(pmic_gpio_functions);
284 }
285 
286 static const char *pmic_gpio_get_function_name(struct pinctrl_dev *pctldev,
287 					       unsigned function)
288 {
289 	return pmic_gpio_functions[function];
290 }
291 
292 static int pmic_gpio_get_function_groups(struct pinctrl_dev *pctldev,
293 					 unsigned function,
294 					 const char *const **groups,
295 					 unsigned *const num_qgroups)
296 {
297 	*groups = pmic_gpio_groups;
298 	*num_qgroups = pctldev->desc->npins;
299 	return 0;
300 }
301 
302 static int pmic_gpio_set_mux(struct pinctrl_dev *pctldev, unsigned function,
303 				unsigned pin)
304 {
305 	struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev);
306 	struct pmic_gpio_pad *pad;
307 	unsigned int val;
308 	int ret;
309 
310 	if (function > PMIC_GPIO_FUNC_INDEX_DTEST4) {
311 		pr_err("function: %d is not defined\n", function);
312 		return -EINVAL;
313 	}
314 
315 	pad = pctldev->desc->pins[pin].drv_data;
316 	/*
317 	 * Non-LV/MV subtypes only support 2 special functions,
318 	 * offsetting the dtestx function values by 2
319 	 */
320 	if (!pad->lv_mv_type) {
321 		if (function == PMIC_GPIO_FUNC_INDEX_FUNC3 ||
322 				function == PMIC_GPIO_FUNC_INDEX_FUNC4) {
323 			pr_err("LV/MV subtype doesn't have func3/func4\n");
324 			return -EINVAL;
325 		}
326 		if (function >= PMIC_GPIO_FUNC_INDEX_DTEST1)
327 			function -= (PMIC_GPIO_FUNC_INDEX_DTEST1 -
328 					PMIC_GPIO_FUNC_INDEX_FUNC3);
329 	}
330 
331 	pad->function = function;
332 
333 	if (pad->analog_pass)
334 		val = PMIC_GPIO_MODE_ANALOG_PASS_THRU;
335 	else if (pad->output_enabled && pad->input_enabled)
336 		val = PMIC_GPIO_MODE_DIGITAL_INPUT_OUTPUT;
337 	else if (pad->output_enabled)
338 		val = PMIC_GPIO_MODE_DIGITAL_OUTPUT;
339 	else
340 		val = PMIC_GPIO_MODE_DIGITAL_INPUT;
341 
342 	if (pad->lv_mv_type) {
343 		ret = pmic_gpio_write(state, pad,
344 				PMIC_GPIO_REG_MODE_CTL, val);
345 		if (ret < 0)
346 			return ret;
347 
348 		val = pad->atest - 1;
349 		ret = pmic_gpio_write(state, pad,
350 				PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL, val);
351 		if (ret < 0)
352 			return ret;
353 
354 		val = pad->out_value
355 			<< PMIC_GPIO_LV_MV_OUTPUT_INVERT_SHIFT;
356 		val |= pad->function
357 			& PMIC_GPIO_LV_MV_OUTPUT_SOURCE_SEL_MASK;
358 		ret = pmic_gpio_write(state, pad,
359 			PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL, val);
360 		if (ret < 0)
361 			return ret;
362 	} else {
363 		val = val << PMIC_GPIO_REG_MODE_DIR_SHIFT;
364 		val |= pad->function << PMIC_GPIO_REG_MODE_FUNCTION_SHIFT;
365 		val |= pad->out_value & PMIC_GPIO_REG_MODE_VALUE_SHIFT;
366 
367 		ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_MODE_CTL, val);
368 		if (ret < 0)
369 			return ret;
370 	}
371 
372 	val = pad->is_enabled << PMIC_GPIO_REG_MASTER_EN_SHIFT;
373 
374 	return pmic_gpio_write(state, pad, PMIC_GPIO_REG_EN_CTL, val);
375 }
376 
377 static const struct pinmux_ops pmic_gpio_pinmux_ops = {
378 	.get_functions_count	= pmic_gpio_get_functions_count,
379 	.get_function_name	= pmic_gpio_get_function_name,
380 	.get_function_groups	= pmic_gpio_get_function_groups,
381 	.set_mux		= pmic_gpio_set_mux,
382 };
383 
384 static int pmic_gpio_config_get(struct pinctrl_dev *pctldev,
385 				unsigned int pin, unsigned long *config)
386 {
387 	unsigned param = pinconf_to_config_param(*config);
388 	struct pmic_gpio_pad *pad;
389 	unsigned arg;
390 
391 	pad = pctldev->desc->pins[pin].drv_data;
392 
393 	switch (param) {
394 	case PIN_CONFIG_DRIVE_PUSH_PULL:
395 		if (pad->buffer_type != PMIC_GPIO_OUT_BUF_CMOS)
396 			return -EINVAL;
397 		arg = 1;
398 		break;
399 	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
400 		if (pad->buffer_type != PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS)
401 			return -EINVAL;
402 		arg = 1;
403 		break;
404 	case PIN_CONFIG_DRIVE_OPEN_SOURCE:
405 		if (pad->buffer_type != PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS)
406 			return -EINVAL;
407 		arg = 1;
408 		break;
409 	case PIN_CONFIG_BIAS_PULL_DOWN:
410 		if (pad->pullup != PMIC_GPIO_PULL_DOWN)
411 			return -EINVAL;
412 		arg = 1;
413 		break;
414 	case PIN_CONFIG_BIAS_DISABLE:
415 		if (pad->pullup != PMIC_GPIO_PULL_DISABLE)
416 			return -EINVAL;
417 		arg = 1;
418 		break;
419 	case PIN_CONFIG_BIAS_PULL_UP:
420 		if (pad->pullup != PMIC_GPIO_PULL_UP_30)
421 			return -EINVAL;
422 		arg = 1;
423 		break;
424 	case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
425 		if (pad->is_enabled)
426 			return -EINVAL;
427 		arg = 1;
428 		break;
429 	case PIN_CONFIG_POWER_SOURCE:
430 		arg = pad->power_source;
431 		break;
432 	case PIN_CONFIG_INPUT_ENABLE:
433 		if (!pad->input_enabled)
434 			return -EINVAL;
435 		arg = 1;
436 		break;
437 	case PIN_CONFIG_OUTPUT_ENABLE:
438 		arg = pad->output_enabled;
439 		break;
440 	case PIN_CONFIG_OUTPUT:
441 		arg = pad->out_value;
442 		break;
443 	case PMIC_GPIO_CONF_PULL_UP:
444 		arg = pad->pullup;
445 		break;
446 	case PMIC_GPIO_CONF_STRENGTH:
447 		switch (pad->strength) {
448 		case PMIC_GPIO_OUT_STRENGTH_HIGH:
449 			arg = PMIC_GPIO_STRENGTH_HIGH;
450 			break;
451 		case PMIC_GPIO_OUT_STRENGTH_LOW:
452 			arg = PMIC_GPIO_STRENGTH_LOW;
453 			break;
454 		default:
455 			arg = pad->strength;
456 			break;
457 		}
458 		break;
459 	case PMIC_GPIO_CONF_ATEST:
460 		arg = pad->atest;
461 		break;
462 	case PMIC_GPIO_CONF_ANALOG_PASS:
463 		arg = pad->analog_pass;
464 		break;
465 	case PMIC_GPIO_CONF_DTEST_BUFFER:
466 		arg = pad->dtest_buffer;
467 		break;
468 	default:
469 		return -EINVAL;
470 	}
471 
472 	*config = pinconf_to_config_packed(param, arg);
473 	return 0;
474 }
475 
476 static int pmic_gpio_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
477 				unsigned long *configs, unsigned nconfs)
478 {
479 	struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev);
480 	struct pmic_gpio_pad *pad;
481 	unsigned param, arg;
482 	unsigned int val;
483 	int i, ret;
484 
485 	pad = pctldev->desc->pins[pin].drv_data;
486 
487 	pad->is_enabled = true;
488 	for (i = 0; i < nconfs; i++) {
489 		param = pinconf_to_config_param(configs[i]);
490 		arg = pinconf_to_config_argument(configs[i]);
491 
492 		switch (param) {
493 		case PIN_CONFIG_DRIVE_PUSH_PULL:
494 			pad->buffer_type = PMIC_GPIO_OUT_BUF_CMOS;
495 			break;
496 		case PIN_CONFIG_DRIVE_OPEN_DRAIN:
497 			if (!pad->have_buffer)
498 				return -EINVAL;
499 			pad->buffer_type = PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS;
500 			break;
501 		case PIN_CONFIG_DRIVE_OPEN_SOURCE:
502 			if (!pad->have_buffer)
503 				return -EINVAL;
504 			pad->buffer_type = PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS;
505 			break;
506 		case PIN_CONFIG_BIAS_DISABLE:
507 			pad->pullup = PMIC_GPIO_PULL_DISABLE;
508 			break;
509 		case PIN_CONFIG_BIAS_PULL_UP:
510 			pad->pullup = PMIC_GPIO_PULL_UP_30;
511 			break;
512 		case PIN_CONFIG_BIAS_PULL_DOWN:
513 			if (arg)
514 				pad->pullup = PMIC_GPIO_PULL_DOWN;
515 			else
516 				pad->pullup = PMIC_GPIO_PULL_DISABLE;
517 			break;
518 		case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
519 			pad->is_enabled = false;
520 			break;
521 		case PIN_CONFIG_POWER_SOURCE:
522 			if (arg >= pad->num_sources)
523 				return -EINVAL;
524 			pad->power_source = arg;
525 			break;
526 		case PIN_CONFIG_INPUT_ENABLE:
527 			pad->input_enabled = arg ? true : false;
528 			break;
529 		case PIN_CONFIG_OUTPUT_ENABLE:
530 			pad->output_enabled = arg ? true : false;
531 			break;
532 		case PIN_CONFIG_OUTPUT:
533 			pad->output_enabled = true;
534 			pad->out_value = arg;
535 			break;
536 		case PMIC_GPIO_CONF_PULL_UP:
537 			if (arg > PMIC_GPIO_PULL_UP_1P5_30)
538 				return -EINVAL;
539 			pad->pullup = arg;
540 			break;
541 		case PMIC_GPIO_CONF_STRENGTH:
542 			if (arg > PMIC_GPIO_STRENGTH_LOW)
543 				return -EINVAL;
544 			switch (arg) {
545 			case PMIC_GPIO_STRENGTH_HIGH:
546 				pad->strength = PMIC_GPIO_OUT_STRENGTH_HIGH;
547 				break;
548 			case PMIC_GPIO_STRENGTH_LOW:
549 				pad->strength = PMIC_GPIO_OUT_STRENGTH_LOW;
550 				break;
551 			default:
552 				pad->strength = arg;
553 				break;
554 			}
555 			break;
556 		case PMIC_GPIO_CONF_ATEST:
557 			if (!pad->lv_mv_type || arg > 4)
558 				return -EINVAL;
559 			pad->atest = arg;
560 			break;
561 		case PMIC_GPIO_CONF_ANALOG_PASS:
562 			if (!pad->lv_mv_type)
563 				return -EINVAL;
564 			pad->analog_pass = true;
565 			break;
566 		case PMIC_GPIO_CONF_DTEST_BUFFER:
567 			if (arg > 4)
568 				return -EINVAL;
569 			pad->dtest_buffer = arg;
570 			break;
571 		default:
572 			return -EINVAL;
573 		}
574 	}
575 
576 	val = pad->power_source << PMIC_GPIO_REG_VIN_SHIFT;
577 
578 	ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_VIN_CTL, val);
579 	if (ret < 0)
580 		return ret;
581 
582 	val = pad->pullup << PMIC_GPIO_REG_PULL_SHIFT;
583 
584 	ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_PULL_CTL, val);
585 	if (ret < 0)
586 		return ret;
587 
588 	val = pad->buffer_type << PMIC_GPIO_REG_OUT_TYPE_SHIFT;
589 	val |= pad->strength << PMIC_GPIO_REG_OUT_STRENGTH_SHIFT;
590 
591 	ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_OUT_CTL, val);
592 	if (ret < 0)
593 		return ret;
594 
595 	if (pad->dtest_buffer == 0) {
596 		val = 0;
597 	} else {
598 		if (pad->lv_mv_type) {
599 			val = pad->dtest_buffer - 1;
600 			val |= PMIC_GPIO_LV_MV_DIG_IN_DTEST_EN;
601 		} else {
602 			val = BIT(pad->dtest_buffer - 1);
603 		}
604 	}
605 	ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_IN_CTL, val);
606 	if (ret < 0)
607 		return ret;
608 
609 	if (pad->analog_pass)
610 		val = PMIC_GPIO_MODE_ANALOG_PASS_THRU;
611 	else if (pad->output_enabled && pad->input_enabled)
612 		val = PMIC_GPIO_MODE_DIGITAL_INPUT_OUTPUT;
613 	else if (pad->output_enabled)
614 		val = PMIC_GPIO_MODE_DIGITAL_OUTPUT;
615 	else
616 		val = PMIC_GPIO_MODE_DIGITAL_INPUT;
617 
618 	if (pad->lv_mv_type) {
619 		ret = pmic_gpio_write(state, pad,
620 				PMIC_GPIO_REG_MODE_CTL, val);
621 		if (ret < 0)
622 			return ret;
623 
624 		val = pad->atest - 1;
625 		ret = pmic_gpio_write(state, pad,
626 				PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL, val);
627 		if (ret < 0)
628 			return ret;
629 
630 		val = pad->out_value
631 			<< PMIC_GPIO_LV_MV_OUTPUT_INVERT_SHIFT;
632 		val |= pad->function
633 			& PMIC_GPIO_LV_MV_OUTPUT_SOURCE_SEL_MASK;
634 		ret = pmic_gpio_write(state, pad,
635 			PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL, val);
636 		if (ret < 0)
637 			return ret;
638 	} else {
639 		val = val << PMIC_GPIO_REG_MODE_DIR_SHIFT;
640 		val |= pad->function << PMIC_GPIO_REG_MODE_FUNCTION_SHIFT;
641 		val |= pad->out_value & PMIC_GPIO_REG_MODE_VALUE_SHIFT;
642 
643 		ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_MODE_CTL, val);
644 		if (ret < 0)
645 			return ret;
646 	}
647 
648 	val = pad->is_enabled << PMIC_GPIO_REG_MASTER_EN_SHIFT;
649 
650 	ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_EN_CTL, val);
651 
652 	return ret;
653 }
654 
655 static void pmic_gpio_config_dbg_show(struct pinctrl_dev *pctldev,
656 				      struct seq_file *s, unsigned pin)
657 {
658 	struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev);
659 	struct pmic_gpio_pad *pad;
660 	int ret, val, function;
661 
662 	static const char *const biases[] = {
663 		"pull-up 30uA", "pull-up 1.5uA", "pull-up 31.5uA",
664 		"pull-up 1.5uA + 30uA boost", "pull-down 10uA", "no pull"
665 	};
666 	static const char *const buffer_types[] = {
667 		"push-pull", "open-drain", "open-source"
668 	};
669 	static const char *const strengths[] = {
670 		"no", "high", "medium", "low"
671 	};
672 
673 	pad = pctldev->desc->pins[pin].drv_data;
674 
675 	seq_printf(s, " gpio%-2d:", pin + PMIC_GPIO_PHYSICAL_OFFSET);
676 
677 	val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_EN_CTL);
678 
679 	if (val < 0 || !(val >> PMIC_GPIO_REG_MASTER_EN_SHIFT)) {
680 		seq_puts(s, " ---");
681 	} else {
682 		if (pad->input_enabled) {
683 			ret = pmic_gpio_read(state, pad, PMIC_MPP_REG_RT_STS);
684 			if (ret < 0)
685 				return;
686 
687 			ret &= PMIC_MPP_REG_RT_STS_VAL_MASK;
688 			pad->out_value = ret;
689 		}
690 		/*
691 		 * For the non-LV/MV subtypes only 2 special functions are
692 		 * available, offsetting the dtest function values by 2.
693 		 */
694 		function = pad->function;
695 		if (!pad->lv_mv_type &&
696 				pad->function >= PMIC_GPIO_FUNC_INDEX_FUNC3)
697 			function += PMIC_GPIO_FUNC_INDEX_DTEST1 -
698 				PMIC_GPIO_FUNC_INDEX_FUNC3;
699 
700 		if (pad->analog_pass)
701 			seq_puts(s, " analog-pass");
702 		else
703 			seq_printf(s, " %-4s",
704 					pad->output_enabled ? "out" : "in");
705 		seq_printf(s, " %-4s", pad->out_value ? "high" : "low");
706 		seq_printf(s, " %-7s", pmic_gpio_functions[function]);
707 		seq_printf(s, " vin-%d", pad->power_source);
708 		seq_printf(s, " %-27s", biases[pad->pullup]);
709 		seq_printf(s, " %-10s", buffer_types[pad->buffer_type]);
710 		seq_printf(s, " %-7s", strengths[pad->strength]);
711 		seq_printf(s, " atest-%d", pad->atest);
712 		seq_printf(s, " dtest-%d", pad->dtest_buffer);
713 	}
714 }
715 
716 static const struct pinconf_ops pmic_gpio_pinconf_ops = {
717 	.is_generic			= true,
718 	.pin_config_group_get		= pmic_gpio_config_get,
719 	.pin_config_group_set		= pmic_gpio_config_set,
720 	.pin_config_group_dbg_show	= pmic_gpio_config_dbg_show,
721 };
722 
723 static int pmic_gpio_direction_input(struct gpio_chip *chip, unsigned pin)
724 {
725 	struct pmic_gpio_state *state = gpiochip_get_data(chip);
726 	unsigned long config;
727 
728 	config = pinconf_to_config_packed(PIN_CONFIG_INPUT_ENABLE, 1);
729 
730 	return pmic_gpio_config_set(state->ctrl, pin, &config, 1);
731 }
732 
733 static int pmic_gpio_direction_output(struct gpio_chip *chip,
734 				      unsigned pin, int val)
735 {
736 	struct pmic_gpio_state *state = gpiochip_get_data(chip);
737 	unsigned long config;
738 
739 	config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, val);
740 
741 	return pmic_gpio_config_set(state->ctrl, pin, &config, 1);
742 }
743 
744 static int pmic_gpio_get(struct gpio_chip *chip, unsigned pin)
745 {
746 	struct pmic_gpio_state *state = gpiochip_get_data(chip);
747 	struct pmic_gpio_pad *pad;
748 	int ret;
749 
750 	pad = state->ctrl->desc->pins[pin].drv_data;
751 
752 	if (!pad->is_enabled)
753 		return -EINVAL;
754 
755 	if (pad->input_enabled) {
756 		ret = pmic_gpio_read(state, pad, PMIC_MPP_REG_RT_STS);
757 		if (ret < 0)
758 			return ret;
759 
760 		pad->out_value = ret & PMIC_MPP_REG_RT_STS_VAL_MASK;
761 	}
762 
763 	return !!pad->out_value;
764 }
765 
766 static void pmic_gpio_set(struct gpio_chip *chip, unsigned pin, int value)
767 {
768 	struct pmic_gpio_state *state = gpiochip_get_data(chip);
769 	unsigned long config;
770 
771 	config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, value);
772 
773 	pmic_gpio_config_set(state->ctrl, pin, &config, 1);
774 }
775 
776 static int pmic_gpio_of_xlate(struct gpio_chip *chip,
777 			      const struct of_phandle_args *gpio_desc,
778 			      u32 *flags)
779 {
780 	if (chip->of_gpio_n_cells < 2)
781 		return -EINVAL;
782 
783 	if (flags)
784 		*flags = gpio_desc->args[1];
785 
786 	return gpio_desc->args[0] - PMIC_GPIO_PHYSICAL_OFFSET;
787 }
788 
789 static void pmic_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
790 {
791 	struct pmic_gpio_state *state = gpiochip_get_data(chip);
792 	unsigned i;
793 
794 	for (i = 0; i < chip->ngpio; i++) {
795 		pmic_gpio_config_dbg_show(state->ctrl, s, i);
796 		seq_puts(s, "\n");
797 	}
798 }
799 
800 static const struct gpio_chip pmic_gpio_gpio_template = {
801 	.direction_input	= pmic_gpio_direction_input,
802 	.direction_output	= pmic_gpio_direction_output,
803 	.get			= pmic_gpio_get,
804 	.set			= pmic_gpio_set,
805 	.request		= gpiochip_generic_request,
806 	.free			= gpiochip_generic_free,
807 	.of_xlate		= pmic_gpio_of_xlate,
808 	.dbg_show		= pmic_gpio_dbg_show,
809 };
810 
811 static int pmic_gpio_populate(struct pmic_gpio_state *state,
812 			      struct pmic_gpio_pad *pad)
813 {
814 	int type, subtype, val, dir;
815 
816 	type = pmic_gpio_read(state, pad, PMIC_GPIO_REG_TYPE);
817 	if (type < 0)
818 		return type;
819 
820 	if (type != PMIC_GPIO_TYPE) {
821 		dev_err(state->dev, "incorrect block type 0x%x at 0x%x\n",
822 			type, pad->base);
823 		return -ENODEV;
824 	}
825 
826 	subtype = pmic_gpio_read(state, pad, PMIC_GPIO_REG_SUBTYPE);
827 	if (subtype < 0)
828 		return subtype;
829 
830 	switch (subtype) {
831 	case PMIC_GPIO_SUBTYPE_GPIO_4CH:
832 		pad->have_buffer = true;
833 		fallthrough;
834 	case PMIC_GPIO_SUBTYPE_GPIOC_4CH:
835 		pad->num_sources = 4;
836 		break;
837 	case PMIC_GPIO_SUBTYPE_GPIO_8CH:
838 		pad->have_buffer = true;
839 		fallthrough;
840 	case PMIC_GPIO_SUBTYPE_GPIOC_8CH:
841 		pad->num_sources = 8;
842 		break;
843 	case PMIC_GPIO_SUBTYPE_GPIO_LV:
844 		pad->num_sources = 1;
845 		pad->have_buffer = true;
846 		pad->lv_mv_type = true;
847 		break;
848 	case PMIC_GPIO_SUBTYPE_GPIO_MV:
849 		pad->num_sources = 2;
850 		pad->have_buffer = true;
851 		pad->lv_mv_type = true;
852 		break;
853 	case PMIC_GPIO_SUBTYPE_GPIO_LV_VIN2:
854 		pad->num_sources = 2;
855 		pad->have_buffer = true;
856 		pad->lv_mv_type = true;
857 		break;
858 	case PMIC_GPIO_SUBTYPE_GPIO_MV_VIN3:
859 		pad->num_sources = 3;
860 		pad->have_buffer = true;
861 		pad->lv_mv_type = true;
862 		break;
863 	default:
864 		dev_err(state->dev, "unknown GPIO type 0x%x\n", subtype);
865 		return -ENODEV;
866 	}
867 
868 	if (pad->lv_mv_type) {
869 		val = pmic_gpio_read(state, pad,
870 				PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL);
871 		if (val < 0)
872 			return val;
873 
874 		pad->out_value = !!(val & PMIC_GPIO_LV_MV_OUTPUT_INVERT);
875 		pad->function = val & PMIC_GPIO_LV_MV_OUTPUT_SOURCE_SEL_MASK;
876 
877 		val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_MODE_CTL);
878 		if (val < 0)
879 			return val;
880 
881 		dir = val & PMIC_GPIO_REG_LV_MV_MODE_DIR_MASK;
882 	} else {
883 		val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_MODE_CTL);
884 		if (val < 0)
885 			return val;
886 
887 		pad->out_value = val & PMIC_GPIO_REG_MODE_VALUE_SHIFT;
888 
889 		dir = val >> PMIC_GPIO_REG_MODE_DIR_SHIFT;
890 		dir &= PMIC_GPIO_REG_MODE_DIR_MASK;
891 		pad->function = val >> PMIC_GPIO_REG_MODE_FUNCTION_SHIFT;
892 		pad->function &= PMIC_GPIO_REG_MODE_FUNCTION_MASK;
893 	}
894 
895 	switch (dir) {
896 	case PMIC_GPIO_MODE_DIGITAL_INPUT:
897 		pad->input_enabled = true;
898 		pad->output_enabled = false;
899 		break;
900 	case PMIC_GPIO_MODE_DIGITAL_OUTPUT:
901 		pad->input_enabled = false;
902 		pad->output_enabled = true;
903 		break;
904 	case PMIC_GPIO_MODE_DIGITAL_INPUT_OUTPUT:
905 		pad->input_enabled = true;
906 		pad->output_enabled = true;
907 		break;
908 	case PMIC_GPIO_MODE_ANALOG_PASS_THRU:
909 		if (!pad->lv_mv_type)
910 			return -ENODEV;
911 		pad->analog_pass = true;
912 		break;
913 	default:
914 		dev_err(state->dev, "unknown GPIO direction\n");
915 		return -ENODEV;
916 	}
917 
918 	val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_VIN_CTL);
919 	if (val < 0)
920 		return val;
921 
922 	pad->power_source = val >> PMIC_GPIO_REG_VIN_SHIFT;
923 	pad->power_source &= PMIC_GPIO_REG_VIN_MASK;
924 
925 	val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_PULL_CTL);
926 	if (val < 0)
927 		return val;
928 
929 	pad->pullup = val >> PMIC_GPIO_REG_PULL_SHIFT;
930 	pad->pullup &= PMIC_GPIO_REG_PULL_MASK;
931 
932 	val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_IN_CTL);
933 	if (val < 0)
934 		return val;
935 
936 	if (pad->lv_mv_type && (val & PMIC_GPIO_LV_MV_DIG_IN_DTEST_EN))
937 		pad->dtest_buffer =
938 			(val & PMIC_GPIO_LV_MV_DIG_IN_DTEST_SEL_MASK) + 1;
939 	else if (!pad->lv_mv_type)
940 		pad->dtest_buffer = ffs(val);
941 	else
942 		pad->dtest_buffer = 0;
943 
944 	val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_OUT_CTL);
945 	if (val < 0)
946 		return val;
947 
948 	pad->strength = val >> PMIC_GPIO_REG_OUT_STRENGTH_SHIFT;
949 	pad->strength &= PMIC_GPIO_REG_OUT_STRENGTH_MASK;
950 
951 	pad->buffer_type = val >> PMIC_GPIO_REG_OUT_TYPE_SHIFT;
952 	pad->buffer_type &= PMIC_GPIO_REG_OUT_TYPE_MASK;
953 
954 	if (pad->lv_mv_type) {
955 		val = pmic_gpio_read(state, pad,
956 				PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL);
957 		if (val < 0)
958 			return val;
959 		pad->atest = (val & PMIC_GPIO_LV_MV_ANA_MUX_SEL_MASK) + 1;
960 	}
961 
962 	/* Pin could be disabled with PIN_CONFIG_BIAS_HIGH_IMPEDANCE */
963 	pad->is_enabled = true;
964 	return 0;
965 }
966 
967 static int pmic_gpio_domain_translate(struct irq_domain *domain,
968 				      struct irq_fwspec *fwspec,
969 				      unsigned long *hwirq,
970 				      unsigned int *type)
971 {
972 	struct pmic_gpio_state *state = container_of(domain->host_data,
973 						     struct pmic_gpio_state,
974 						     chip);
975 
976 	if (fwspec->param_count != 2 ||
977 	    fwspec->param[0] < 1 || fwspec->param[0] > state->chip.ngpio)
978 		return -EINVAL;
979 
980 	*hwirq = fwspec->param[0] - PMIC_GPIO_PHYSICAL_OFFSET;
981 	*type = fwspec->param[1];
982 
983 	return 0;
984 }
985 
986 static unsigned int pmic_gpio_child_offset_to_irq(struct gpio_chip *chip,
987 						  unsigned int offset)
988 {
989 	return offset + PMIC_GPIO_PHYSICAL_OFFSET;
990 }
991 
992 static int pmic_gpio_child_to_parent_hwirq(struct gpio_chip *chip,
993 					   unsigned int child_hwirq,
994 					   unsigned int child_type,
995 					   unsigned int *parent_hwirq,
996 					   unsigned int *parent_type)
997 {
998 	struct pmic_gpio_state *state = gpiochip_get_data(chip);
999 
1000 	*parent_hwirq = child_hwirq + state->pid_base;
1001 	*parent_type = child_type;
1002 
1003 	return 0;
1004 }
1005 
1006 static int pmic_gpio_populate_parent_fwspec(struct gpio_chip *chip,
1007 					    union gpio_irq_fwspec *gfwspec,
1008 					    unsigned int parent_hwirq,
1009 					    unsigned int parent_type)
1010 {
1011 	struct pmic_gpio_state *state = gpiochip_get_data(chip);
1012 	struct irq_fwspec *fwspec = &gfwspec->fwspec;
1013 
1014 	fwspec->fwnode = chip->irq.parent_domain->fwnode;
1015 
1016 	fwspec->param_count = 4;
1017 	fwspec->param[0] = state->usid;
1018 	fwspec->param[1] = parent_hwirq;
1019 	/* param[2] must be left as 0 */
1020 	fwspec->param[3] = parent_type;
1021 
1022 	return 0;
1023 }
1024 
1025 static void pmic_gpio_irq_mask(struct irq_data *data)
1026 {
1027 	struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
1028 
1029 	irq_chip_mask_parent(data);
1030 	gpiochip_disable_irq(gc, data->hwirq);
1031 }
1032 
1033 static void pmic_gpio_irq_unmask(struct irq_data *data)
1034 {
1035 	struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
1036 
1037 	gpiochip_enable_irq(gc, data->hwirq);
1038 	irq_chip_unmask_parent(data);
1039 }
1040 
1041 static const struct irq_chip spmi_gpio_irq_chip = {
1042 	.name		= "spmi-gpio",
1043 	.irq_ack	= irq_chip_ack_parent,
1044 	.irq_mask	= pmic_gpio_irq_mask,
1045 	.irq_unmask	= pmic_gpio_irq_unmask,
1046 	.irq_set_type	= irq_chip_set_type_parent,
1047 	.irq_set_wake	= irq_chip_set_wake_parent,
1048 	.flags		= IRQCHIP_IMMUTABLE | IRQCHIP_MASK_ON_SUSPEND,
1049 	GPIOCHIP_IRQ_RESOURCE_HELPERS,
1050 };
1051 
1052 static int pmic_gpio_probe(struct platform_device *pdev)
1053 {
1054 	struct irq_domain *parent_domain;
1055 	struct device_node *parent_node;
1056 	struct device *dev = &pdev->dev;
1057 	struct pinctrl_pin_desc *pindesc;
1058 	struct pinctrl_desc *pctrldesc;
1059 	struct pmic_gpio_pad *pad, *pads;
1060 	struct pmic_gpio_state *state;
1061 	struct gpio_irq_chip *girq;
1062 	const struct spmi_device *parent_spmi_dev;
1063 	int ret, npins, i;
1064 	u32 reg;
1065 
1066 	ret = of_property_read_u32(dev->of_node, "reg", &reg);
1067 	if (ret < 0) {
1068 		dev_err(dev, "missing base address");
1069 		return ret;
1070 	}
1071 
1072 	npins = (uintptr_t) device_get_match_data(&pdev->dev);
1073 
1074 	state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
1075 	if (!state)
1076 		return -ENOMEM;
1077 
1078 	platform_set_drvdata(pdev, state);
1079 
1080 	state->dev = &pdev->dev;
1081 	state->map = dev_get_regmap(dev->parent, NULL);
1082 	parent_spmi_dev = to_spmi_device(dev->parent);
1083 	state->usid = parent_spmi_dev->usid;
1084 	state->pid_base = reg >> 8;
1085 
1086 	pindesc = devm_kcalloc(dev, npins, sizeof(*pindesc), GFP_KERNEL);
1087 	if (!pindesc)
1088 		return -ENOMEM;
1089 
1090 	pads = devm_kcalloc(dev, npins, sizeof(*pads), GFP_KERNEL);
1091 	if (!pads)
1092 		return -ENOMEM;
1093 
1094 	pctrldesc = devm_kzalloc(dev, sizeof(*pctrldesc), GFP_KERNEL);
1095 	if (!pctrldesc)
1096 		return -ENOMEM;
1097 
1098 	pctrldesc->pctlops = &pmic_gpio_pinctrl_ops;
1099 	pctrldesc->pmxops = &pmic_gpio_pinmux_ops;
1100 	pctrldesc->confops = &pmic_gpio_pinconf_ops;
1101 	pctrldesc->owner = THIS_MODULE;
1102 	pctrldesc->name = dev_name(dev);
1103 	pctrldesc->pins = pindesc;
1104 	pctrldesc->npins = npins;
1105 	pctrldesc->num_custom_params = ARRAY_SIZE(pmic_gpio_bindings);
1106 	pctrldesc->custom_params = pmic_gpio_bindings;
1107 #ifdef CONFIG_DEBUG_FS
1108 	pctrldesc->custom_conf_items = pmic_conf_items;
1109 #endif
1110 
1111 	for (i = 0; i < npins; i++, pindesc++) {
1112 		pad = &pads[i];
1113 		pindesc->drv_data = pad;
1114 		pindesc->number = i;
1115 		pindesc->name = pmic_gpio_groups[i];
1116 
1117 		pad->base = reg + i * PMIC_GPIO_ADDRESS_RANGE;
1118 
1119 		ret = pmic_gpio_populate(state, pad);
1120 		if (ret < 0)
1121 			return ret;
1122 	}
1123 
1124 	state->chip = pmic_gpio_gpio_template;
1125 	state->chip.parent = dev;
1126 	state->chip.base = -1;
1127 	state->chip.ngpio = npins;
1128 	state->chip.label = dev_name(dev);
1129 	state->chip.of_gpio_n_cells = 2;
1130 	state->chip.can_sleep = false;
1131 
1132 	state->ctrl = devm_pinctrl_register(dev, pctrldesc, state);
1133 	if (IS_ERR(state->ctrl))
1134 		return PTR_ERR(state->ctrl);
1135 
1136 	parent_node = of_irq_find_parent(state->dev->of_node);
1137 	if (!parent_node)
1138 		return -ENXIO;
1139 
1140 	parent_domain = irq_find_host(parent_node);
1141 	of_node_put(parent_node);
1142 	if (!parent_domain)
1143 		return -ENXIO;
1144 
1145 	girq = &state->chip.irq;
1146 	gpio_irq_chip_set_chip(girq, &spmi_gpio_irq_chip);
1147 	girq->default_type = IRQ_TYPE_NONE;
1148 	girq->handler = handle_level_irq;
1149 	girq->fwnode = of_node_to_fwnode(state->dev->of_node);
1150 	girq->parent_domain = parent_domain;
1151 	girq->child_to_parent_hwirq = pmic_gpio_child_to_parent_hwirq;
1152 	girq->populate_parent_alloc_arg = pmic_gpio_populate_parent_fwspec;
1153 	girq->child_offset_to_irq = pmic_gpio_child_offset_to_irq;
1154 	girq->child_irq_domain_ops.translate = pmic_gpio_domain_translate;
1155 
1156 	ret = gpiochip_add_data(&state->chip, state);
1157 	if (ret) {
1158 		dev_err(state->dev, "can't add gpio chip\n");
1159 		return ret;
1160 	}
1161 
1162 	/*
1163 	 * For DeviceTree-supported systems, the gpio core checks the
1164 	 * pinctrl's device node for the "gpio-ranges" property.
1165 	 * If it is present, it takes care of adding the pin ranges
1166 	 * for the driver. In this case the driver can skip ahead.
1167 	 *
1168 	 * In order to remain compatible with older, existing DeviceTree
1169 	 * files which don't set the "gpio-ranges" property or systems that
1170 	 * utilize ACPI the driver has to call gpiochip_add_pin_range().
1171 	 */
1172 	if (!of_property_read_bool(dev->of_node, "gpio-ranges")) {
1173 		ret = gpiochip_add_pin_range(&state->chip, dev_name(dev), 0, 0,
1174 					     npins);
1175 		if (ret) {
1176 			dev_err(dev, "failed to add pin range\n");
1177 			goto err_range;
1178 		}
1179 	}
1180 
1181 	return 0;
1182 
1183 err_range:
1184 	gpiochip_remove(&state->chip);
1185 	return ret;
1186 }
1187 
1188 static int pmic_gpio_remove(struct platform_device *pdev)
1189 {
1190 	struct pmic_gpio_state *state = platform_get_drvdata(pdev);
1191 
1192 	gpiochip_remove(&state->chip);
1193 	return 0;
1194 }
1195 
1196 static const struct of_device_id pmic_gpio_of_match[] = {
1197 	{ .compatible = "qcom,pm2250-gpio", .data = (void *) 10 },
1198 	/* pm660 has 13 GPIOs with holes on 1, 5, 6, 7, 8 and 10 */
1199 	{ .compatible = "qcom,pm660-gpio", .data = (void *) 13 },
1200 	/* pm660l has 12 GPIOs with holes on 1, 2, 10, 11 and 12 */
1201 	{ .compatible = "qcom,pm660l-gpio", .data = (void *) 12 },
1202 	{ .compatible = "qcom,pm6125-gpio", .data = (void *) 9 },
1203 	{ .compatible = "qcom,pm6150-gpio", .data = (void *) 10 },
1204 	{ .compatible = "qcom,pm6150l-gpio", .data = (void *) 12 },
1205 	{ .compatible = "qcom,pm6350-gpio", .data = (void *) 9 },
1206 	{ .compatible = "qcom,pm7250b-gpio", .data = (void *) 12 },
1207 	{ .compatible = "qcom,pm7325-gpio", .data = (void *) 10 },
1208 	{ .compatible = "qcom,pm8005-gpio", .data = (void *) 4 },
1209 	{ .compatible = "qcom,pm8008-gpio", .data = (void *) 2 },
1210 	{ .compatible = "qcom,pm8019-gpio", .data = (void *) 6 },
1211 	/* pm8150 has 10 GPIOs with holes on 2, 5, 7 and 8 */
1212 	{ .compatible = "qcom,pm8150-gpio", .data = (void *) 10 },
1213 	{ .compatible = "qcom,pmc8180-gpio", .data = (void *) 10 },
1214 	/* pm8150b has 12 GPIOs with holes on 3, r and 7 */
1215 	{ .compatible = "qcom,pm8150b-gpio", .data = (void *) 12 },
1216 	/* pm8150l has 12 GPIOs with holes on 7 */
1217 	{ .compatible = "qcom,pm8150l-gpio", .data = (void *) 12 },
1218 	{ .compatible = "qcom,pmc8180c-gpio", .data = (void *) 12 },
1219 	{ .compatible = "qcom,pm8226-gpio", .data = (void *) 8 },
1220 	{ .compatible = "qcom,pm8350-gpio", .data = (void *) 10 },
1221 	{ .compatible = "qcom,pm8350b-gpio", .data = (void *) 8 },
1222 	{ .compatible = "qcom,pm8350c-gpio", .data = (void *) 9 },
1223 	{ .compatible = "qcom,pm8450-gpio", .data = (void *) 4 },
1224 	{ .compatible = "qcom,pm8916-gpio", .data = (void *) 4 },
1225 	{ .compatible = "qcom,pm8941-gpio", .data = (void *) 36 },
1226 	/* pm8950 has 8 GPIOs with holes on 3 */
1227 	{ .compatible = "qcom,pm8950-gpio", .data = (void *) 8 },
1228 	{ .compatible = "qcom,pm8994-gpio", .data = (void *) 22 },
1229 	{ .compatible = "qcom,pm8998-gpio", .data = (void *) 26 },
1230 	{ .compatible = "qcom,pma8084-gpio", .data = (void *) 22 },
1231 	{ .compatible = "qcom,pmi8950-gpio", .data = (void *) 2 },
1232 	{ .compatible = "qcom,pmi8994-gpio", .data = (void *) 10 },
1233 	{ .compatible = "qcom,pmi8998-gpio", .data = (void *) 14 },
1234 	{ .compatible = "qcom,pmk8350-gpio", .data = (void *) 4 },
1235 	{ .compatible = "qcom,pmm8155au-gpio", .data = (void *) 10 },
1236 	/* pmp8074 has 12 GPIOs with holes on 1 and 12 */
1237 	{ .compatible = "qcom,pmp8074-gpio", .data = (void *) 12 },
1238 	{ .compatible = "qcom,pmr735a-gpio", .data = (void *) 4 },
1239 	{ .compatible = "qcom,pmr735b-gpio", .data = (void *) 4 },
1240 	/* pms405 has 12 GPIOs with holes on 1, 9, and 10 */
1241 	{ .compatible = "qcom,pms405-gpio", .data = (void *) 12 },
1242 	/* pmx55 has 11 GPIOs with holes on 3, 7, 10, 11 */
1243 	{ .compatible = "qcom,pmx55-gpio", .data = (void *) 11 },
1244 	{ .compatible = "qcom,pmx65-gpio", .data = (void *) 16 },
1245 	{ },
1246 };
1247 
1248 MODULE_DEVICE_TABLE(of, pmic_gpio_of_match);
1249 
1250 static struct platform_driver pmic_gpio_driver = {
1251 	.driver = {
1252 		   .name = "qcom-spmi-gpio",
1253 		   .of_match_table = pmic_gpio_of_match,
1254 	},
1255 	.probe	= pmic_gpio_probe,
1256 	.remove = pmic_gpio_remove,
1257 };
1258 
1259 module_platform_driver(pmic_gpio_driver);
1260 
1261 MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");
1262 MODULE_DESCRIPTION("Qualcomm SPMI PMIC GPIO pin control driver");
1263 MODULE_ALIAS("platform:qcom-spmi-gpio");
1264 MODULE_LICENSE("GPL v2");
1265