2 * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
14 #include <linux/gpio.h>
15 #include <linux/module.h>
17 #include <linux/pinctrl/pinconf-generic.h>
18 #include <linux/pinctrl/pinconf.h>
19 #include <linux/pinctrl/pinmux.h>
20 #include <linux/platform_device.h>
21 #include <linux/regmap.h>
22 #include <linux/slab.h>
23 #include <linux/types.h>
25 #include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
28 #include "../pinctrl-utils.h"
30 #define PMIC_GPIO_ADDRESS_RANGE 0x100
32 /* type and subtype registers base address offsets */
33 #define PMIC_GPIO_REG_TYPE 0x4
34 #define PMIC_GPIO_REG_SUBTYPE 0x5
36 /* GPIO peripheral type and subtype out_values */
37 #define PMIC_GPIO_TYPE 0x10
38 #define PMIC_GPIO_SUBTYPE_GPIO_4CH 0x1
39 #define PMIC_GPIO_SUBTYPE_GPIOC_4CH 0x5
40 #define PMIC_GPIO_SUBTYPE_GPIO_8CH 0x9
41 #define PMIC_GPIO_SUBTYPE_GPIOC_8CH 0xd
43 #define PMIC_MPP_REG_RT_STS 0x10
44 #define PMIC_MPP_REG_RT_STS_VAL_MASK 0x1
46 /* control register base address offsets */
47 #define PMIC_GPIO_REG_MODE_CTL 0x40
48 #define PMIC_GPIO_REG_DIG_VIN_CTL 0x41
49 #define PMIC_GPIO_REG_DIG_PULL_CTL 0x42
50 #define PMIC_GPIO_REG_DIG_OUT_CTL 0x45
51 #define PMIC_GPIO_REG_EN_CTL 0x46
53 /* PMIC_GPIO_REG_MODE_CTL */
54 #define PMIC_GPIO_REG_MODE_VALUE_SHIFT 0x1
55 #define PMIC_GPIO_REG_MODE_FUNCTION_SHIFT 1
56 #define PMIC_GPIO_REG_MODE_FUNCTION_MASK 0x7
57 #define PMIC_GPIO_REG_MODE_DIR_SHIFT 4
58 #define PMIC_GPIO_REG_MODE_DIR_MASK 0x7
60 /* PMIC_GPIO_REG_DIG_VIN_CTL */
61 #define PMIC_GPIO_REG_VIN_SHIFT 0
62 #define PMIC_GPIO_REG_VIN_MASK 0x7
64 /* PMIC_GPIO_REG_DIG_PULL_CTL */
65 #define PMIC_GPIO_REG_PULL_SHIFT 0
66 #define PMIC_GPIO_REG_PULL_MASK 0x7
68 #define PMIC_GPIO_PULL_DOWN 4
69 #define PMIC_GPIO_PULL_DISABLE 5
71 /* PMIC_GPIO_REG_DIG_OUT_CTL */
72 #define PMIC_GPIO_REG_OUT_STRENGTH_SHIFT 0
73 #define PMIC_GPIO_REG_OUT_STRENGTH_MASK 0x3
74 #define PMIC_GPIO_REG_OUT_TYPE_SHIFT 4
75 #define PMIC_GPIO_REG_OUT_TYPE_MASK 0x3
78 * Output type - indicates pin should be configured as push-pull,
79 * open drain or open source.
81 #define PMIC_GPIO_OUT_BUF_CMOS 0
82 #define PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS 1
83 #define PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS 2
85 /* PMIC_GPIO_REG_EN_CTL */
86 #define PMIC_GPIO_REG_MASTER_EN_SHIFT 7
88 #define PMIC_GPIO_PHYSICAL_OFFSET 1
90 /* Qualcomm specific pin configurations */
91 #define PMIC_GPIO_CONF_PULL_UP (PIN_CONFIG_END + 1)
92 #define PMIC_GPIO_CONF_STRENGTH (PIN_CONFIG_END + 2)
95 * struct pmic_gpio_pad - keep current GPIO settings
96 * @base: Address base in SPMI device.
97 * @irq: IRQ number which this GPIO generate.
98 * @is_enabled: Set to false when GPIO should be put in high Z state.
99 * @out_value: Cached pin output value
100 * @have_buffer: Set to true if GPIO output could be configured in push-pull,
101 * open-drain or open-source mode.
102 * @output_enabled: Set to true if GPIO output logic is enabled.
103 * @input_enabled: Set to true if GPIO input buffer logic is enabled.
104 * @num_sources: Number of power-sources supported by this GPIO.
105 * @power_source: Current power-source used.
106 * @buffer_type: Push-pull, open-drain or open-source.
107 * @pullup: Constant current which flow trough GPIO output buffer.
108 * @strength: No, Low, Medium, High
109 * @function: See pmic_gpio_functions[]
111 struct pmic_gpio_pad
{
119 unsigned int num_sources
;
120 unsigned int power_source
;
121 unsigned int buffer_type
;
123 unsigned int strength
;
124 unsigned int function
;
127 struct pmic_gpio_state
{
130 struct pinctrl_dev
*ctrl
;
131 struct gpio_chip chip
;
134 static const struct pinconf_generic_params pmic_gpio_bindings
[] = {
135 {"qcom,pull-up-strength", PMIC_GPIO_CONF_PULL_UP
, 0},
136 {"qcom,drive-strength", PMIC_GPIO_CONF_STRENGTH
, 0},
139 #ifdef CONFIG_DEBUG_FS
140 static const struct pin_config_item pmic_conf_items
[ARRAY_SIZE(pmic_gpio_bindings
)] = {
141 PCONFDUMP(PMIC_GPIO_CONF_PULL_UP
, "pull up strength", NULL
, true),
142 PCONFDUMP(PMIC_GPIO_CONF_STRENGTH
, "drive-strength", NULL
, true),
146 static const char *const pmic_gpio_groups
[] = {
147 "gpio1", "gpio2", "gpio3", "gpio4", "gpio5", "gpio6", "gpio7", "gpio8",
148 "gpio9", "gpio10", "gpio11", "gpio12", "gpio13", "gpio14", "gpio15",
149 "gpio16", "gpio17", "gpio18", "gpio19", "gpio20", "gpio21", "gpio22",
150 "gpio23", "gpio24", "gpio25", "gpio26", "gpio27", "gpio28", "gpio29",
151 "gpio30", "gpio31", "gpio32", "gpio33", "gpio34", "gpio35", "gpio36",
154 static const char *const pmic_gpio_functions
[] = {
155 PMIC_GPIO_FUNC_NORMAL
, PMIC_GPIO_FUNC_PAIRED
,
156 PMIC_GPIO_FUNC_FUNC1
, PMIC_GPIO_FUNC_FUNC2
,
157 PMIC_GPIO_FUNC_DTEST1
, PMIC_GPIO_FUNC_DTEST2
,
158 PMIC_GPIO_FUNC_DTEST3
, PMIC_GPIO_FUNC_DTEST4
,
161 static inline struct pmic_gpio_state
*to_gpio_state(struct gpio_chip
*chip
)
163 return container_of(chip
, struct pmic_gpio_state
, chip
);
166 static int pmic_gpio_read(struct pmic_gpio_state
*state
,
167 struct pmic_gpio_pad
*pad
, unsigned int addr
)
172 ret
= regmap_read(state
->map
, pad
->base
+ addr
, &val
);
174 dev_err(state
->dev
, "read 0x%x failed\n", addr
);
181 static int pmic_gpio_write(struct pmic_gpio_state
*state
,
182 struct pmic_gpio_pad
*pad
, unsigned int addr
,
187 ret
= regmap_write(state
->map
, pad
->base
+ addr
, val
);
189 dev_err(state
->dev
, "write 0x%x failed\n", addr
);
194 static int pmic_gpio_get_groups_count(struct pinctrl_dev
*pctldev
)
196 /* Every PIN is a group */
197 return pctldev
->desc
->npins
;
200 static const char *pmic_gpio_get_group_name(struct pinctrl_dev
*pctldev
,
203 return pctldev
->desc
->pins
[pin
].name
;
206 static int pmic_gpio_get_group_pins(struct pinctrl_dev
*pctldev
, unsigned pin
,
207 const unsigned **pins
, unsigned *num_pins
)
209 *pins
= &pctldev
->desc
->pins
[pin
].number
;
214 static const struct pinctrl_ops pmic_gpio_pinctrl_ops
= {
215 .get_groups_count
= pmic_gpio_get_groups_count
,
216 .get_group_name
= pmic_gpio_get_group_name
,
217 .get_group_pins
= pmic_gpio_get_group_pins
,
218 .dt_node_to_map
= pinconf_generic_dt_node_to_map_group
,
219 .dt_free_map
= pinctrl_utils_dt_free_map
,
222 static int pmic_gpio_get_functions_count(struct pinctrl_dev
*pctldev
)
224 return ARRAY_SIZE(pmic_gpio_functions
);
227 static const char *pmic_gpio_get_function_name(struct pinctrl_dev
*pctldev
,
230 return pmic_gpio_functions
[function
];
233 static int pmic_gpio_get_function_groups(struct pinctrl_dev
*pctldev
,
235 const char *const **groups
,
236 unsigned *const num_qgroups
)
238 *groups
= pmic_gpio_groups
;
239 *num_qgroups
= pctldev
->desc
->npins
;
243 static int pmic_gpio_set_mux(struct pinctrl_dev
*pctldev
, unsigned function
,
246 struct pmic_gpio_state
*state
= pinctrl_dev_get_drvdata(pctldev
);
247 struct pmic_gpio_pad
*pad
;
251 pad
= pctldev
->desc
->pins
[pin
].drv_data
;
253 pad
->function
= function
;
256 if (pad
->output_enabled
) {
257 if (pad
->input_enabled
)
263 val
= val
<< PMIC_GPIO_REG_MODE_DIR_SHIFT
;
264 val
|= pad
->function
<< PMIC_GPIO_REG_MODE_FUNCTION_SHIFT
;
265 val
|= pad
->out_value
& PMIC_GPIO_REG_MODE_VALUE_SHIFT
;
267 ret
= pmic_gpio_write(state
, pad
, PMIC_GPIO_REG_MODE_CTL
, val
);
271 val
= pad
->is_enabled
<< PMIC_GPIO_REG_MASTER_EN_SHIFT
;
273 return pmic_gpio_write(state
, pad
, PMIC_GPIO_REG_EN_CTL
, val
);
276 static const struct pinmux_ops pmic_gpio_pinmux_ops
= {
277 .get_functions_count
= pmic_gpio_get_functions_count
,
278 .get_function_name
= pmic_gpio_get_function_name
,
279 .get_function_groups
= pmic_gpio_get_function_groups
,
280 .set_mux
= pmic_gpio_set_mux
,
283 static int pmic_gpio_config_get(struct pinctrl_dev
*pctldev
,
284 unsigned int pin
, unsigned long *config
)
286 unsigned param
= pinconf_to_config_param(*config
);
287 struct pmic_gpio_pad
*pad
;
290 pad
= pctldev
->desc
->pins
[pin
].drv_data
;
293 case PIN_CONFIG_DRIVE_PUSH_PULL
:
294 arg
= pad
->buffer_type
== PMIC_GPIO_OUT_BUF_CMOS
;
296 case PIN_CONFIG_DRIVE_OPEN_DRAIN
:
297 arg
= pad
->buffer_type
== PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS
;
299 case PIN_CONFIG_DRIVE_OPEN_SOURCE
:
300 arg
= pad
->buffer_type
== PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS
;
302 case PIN_CONFIG_BIAS_PULL_DOWN
:
303 arg
= pad
->pullup
== PMIC_GPIO_PULL_DOWN
;
305 case PIN_CONFIG_BIAS_DISABLE
:
306 arg
= pad
->pullup
= PMIC_GPIO_PULL_DISABLE
;
308 case PIN_CONFIG_BIAS_PULL_UP
:
309 arg
= pad
->pullup
== PMIC_GPIO_PULL_UP_30
;
311 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE
:
312 arg
= !pad
->is_enabled
;
314 case PIN_CONFIG_POWER_SOURCE
:
315 arg
= pad
->power_source
;
317 case PIN_CONFIG_INPUT_ENABLE
:
318 arg
= pad
->input_enabled
;
320 case PIN_CONFIG_OUTPUT
:
321 arg
= pad
->out_value
;
323 case PMIC_GPIO_CONF_PULL_UP
:
326 case PMIC_GPIO_CONF_STRENGTH
:
333 *config
= pinconf_to_config_packed(param
, arg
);
337 static int pmic_gpio_config_set(struct pinctrl_dev
*pctldev
, unsigned int pin
,
338 unsigned long *configs
, unsigned nconfs
)
340 struct pmic_gpio_state
*state
= pinctrl_dev_get_drvdata(pctldev
);
341 struct pmic_gpio_pad
*pad
;
346 pad
= pctldev
->desc
->pins
[pin
].drv_data
;
348 for (i
= 0; i
< nconfs
; i
++) {
349 param
= pinconf_to_config_param(configs
[i
]);
350 arg
= pinconf_to_config_argument(configs
[i
]);
353 case PIN_CONFIG_DRIVE_PUSH_PULL
:
354 pad
->buffer_type
= PMIC_GPIO_OUT_BUF_CMOS
;
356 case PIN_CONFIG_DRIVE_OPEN_DRAIN
:
357 if (!pad
->have_buffer
)
359 pad
->buffer_type
= PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS
;
361 case PIN_CONFIG_DRIVE_OPEN_SOURCE
:
362 if (!pad
->have_buffer
)
364 pad
->buffer_type
= PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS
;
366 case PIN_CONFIG_BIAS_DISABLE
:
367 pad
->pullup
= PMIC_GPIO_PULL_DISABLE
;
369 case PIN_CONFIG_BIAS_PULL_UP
:
370 pad
->pullup
= PMIC_GPIO_PULL_UP_30
;
372 case PIN_CONFIG_BIAS_PULL_DOWN
:
374 pad
->pullup
= PMIC_GPIO_PULL_DOWN
;
376 pad
->pullup
= PMIC_GPIO_PULL_DISABLE
;
378 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE
:
379 pad
->is_enabled
= false;
381 case PIN_CONFIG_POWER_SOURCE
:
382 if (arg
> pad
->num_sources
)
384 pad
->power_source
= arg
;
386 case PIN_CONFIG_INPUT_ENABLE
:
387 pad
->input_enabled
= arg
? true : false;
389 case PIN_CONFIG_OUTPUT
:
390 pad
->output_enabled
= true;
391 pad
->out_value
= arg
;
393 case PMIC_GPIO_CONF_PULL_UP
:
394 if (arg
> PMIC_GPIO_PULL_UP_1P5_30
)
398 case PMIC_GPIO_CONF_STRENGTH
:
399 if (arg
> PMIC_GPIO_STRENGTH_LOW
)
408 val
= pad
->power_source
<< PMIC_GPIO_REG_VIN_SHIFT
;
410 ret
= pmic_gpio_write(state
, pad
, PMIC_GPIO_REG_DIG_VIN_CTL
, val
);
414 val
= pad
->pullup
<< PMIC_GPIO_REG_PULL_SHIFT
;
416 ret
= pmic_gpio_write(state
, pad
, PMIC_GPIO_REG_DIG_PULL_CTL
, val
);
420 val
= pad
->buffer_type
<< PMIC_GPIO_REG_OUT_TYPE_SHIFT
;
421 val
|= pad
->strength
<< PMIC_GPIO_REG_OUT_STRENGTH_SHIFT
;
423 ret
= pmic_gpio_write(state
, pad
, PMIC_GPIO_REG_DIG_OUT_CTL
, val
);
428 if (pad
->output_enabled
) {
429 if (pad
->input_enabled
)
435 val
= val
<< PMIC_GPIO_REG_MODE_DIR_SHIFT
;
436 val
|= pad
->function
<< PMIC_GPIO_REG_MODE_FUNCTION_SHIFT
;
437 val
|= pad
->out_value
& PMIC_GPIO_REG_MODE_VALUE_SHIFT
;
439 return pmic_gpio_write(state
, pad
, PMIC_GPIO_REG_MODE_CTL
, val
);
442 static void pmic_gpio_config_dbg_show(struct pinctrl_dev
*pctldev
,
443 struct seq_file
*s
, unsigned pin
)
445 struct pmic_gpio_state
*state
= pinctrl_dev_get_drvdata(pctldev
);
446 struct pmic_gpio_pad
*pad
;
449 static const char *const biases
[] = {
450 "pull-up 30uA", "pull-up 1.5uA", "pull-up 31.5uA",
451 "pull-up 1.5uA + 30uA boost", "pull-down 10uA", "no pull"
453 static const char *const buffer_types
[] = {
454 "push-pull", "open-drain", "open-source"
456 static const char *const strengths
[] = {
457 "no", "high", "medium", "low"
460 pad
= pctldev
->desc
->pins
[pin
].drv_data
;
462 seq_printf(s
, " gpio%-2d:", pin
+ PMIC_GPIO_PHYSICAL_OFFSET
);
464 val
= pmic_gpio_read(state
, pad
, PMIC_GPIO_REG_EN_CTL
);
466 if (val
< 0 || !(val
>> PMIC_GPIO_REG_MASTER_EN_SHIFT
)) {
470 if (pad
->input_enabled
) {
471 ret
= pmic_gpio_read(state
, pad
, PMIC_MPP_REG_RT_STS
);
475 ret
&= PMIC_MPP_REG_RT_STS_VAL_MASK
;
476 pad
->out_value
= ret
;
479 seq_printf(s
, " %-4s", pad
->output_enabled
? "out" : "in");
480 seq_printf(s
, " %-7s", pmic_gpio_functions
[pad
->function
]);
481 seq_printf(s
, " vin-%d", pad
->power_source
);
482 seq_printf(s
, " %-27s", biases
[pad
->pullup
]);
483 seq_printf(s
, " %-10s", buffer_types
[pad
->buffer_type
]);
484 seq_printf(s
, " %-4s", pad
->out_value
? "high" : "low");
485 seq_printf(s
, " %-7s", strengths
[pad
->strength
]);
489 static const struct pinconf_ops pmic_gpio_pinconf_ops
= {
491 .pin_config_group_get
= pmic_gpio_config_get
,
492 .pin_config_group_set
= pmic_gpio_config_set
,
493 .pin_config_group_dbg_show
= pmic_gpio_config_dbg_show
,
496 static int pmic_gpio_direction_input(struct gpio_chip
*chip
, unsigned pin
)
498 struct pmic_gpio_state
*state
= to_gpio_state(chip
);
499 unsigned long config
;
501 config
= pinconf_to_config_packed(PIN_CONFIG_INPUT_ENABLE
, 1);
503 return pmic_gpio_config_set(state
->ctrl
, pin
, &config
, 1);
506 static int pmic_gpio_direction_output(struct gpio_chip
*chip
,
507 unsigned pin
, int val
)
509 struct pmic_gpio_state
*state
= to_gpio_state(chip
);
510 unsigned long config
;
512 config
= pinconf_to_config_packed(PIN_CONFIG_OUTPUT
, val
);
514 return pmic_gpio_config_set(state
->ctrl
, pin
, &config
, 1);
517 static int pmic_gpio_get(struct gpio_chip
*chip
, unsigned pin
)
519 struct pmic_gpio_state
*state
= to_gpio_state(chip
);
520 struct pmic_gpio_pad
*pad
;
523 pad
= state
->ctrl
->desc
->pins
[pin
].drv_data
;
525 if (!pad
->is_enabled
)
528 if (pad
->input_enabled
) {
529 ret
= pmic_gpio_read(state
, pad
, PMIC_MPP_REG_RT_STS
);
533 pad
->out_value
= ret
& PMIC_MPP_REG_RT_STS_VAL_MASK
;
536 return pad
->out_value
;
539 static void pmic_gpio_set(struct gpio_chip
*chip
, unsigned pin
, int value
)
541 struct pmic_gpio_state
*state
= to_gpio_state(chip
);
542 unsigned long config
;
544 config
= pinconf_to_config_packed(PIN_CONFIG_OUTPUT
, value
);
546 pmic_gpio_config_set(state
->ctrl
, pin
, &config
, 1);
549 static int pmic_gpio_request(struct gpio_chip
*chip
, unsigned base
)
551 return pinctrl_request_gpio(chip
->base
+ base
);
554 static void pmic_gpio_free(struct gpio_chip
*chip
, unsigned base
)
556 pinctrl_free_gpio(chip
->base
+ base
);
559 static int pmic_gpio_of_xlate(struct gpio_chip
*chip
,
560 const struct of_phandle_args
*gpio_desc
,
563 if (chip
->of_gpio_n_cells
< 2)
567 *flags
= gpio_desc
->args
[1];
569 return gpio_desc
->args
[0] - PMIC_GPIO_PHYSICAL_OFFSET
;
572 static int pmic_gpio_to_irq(struct gpio_chip
*chip
, unsigned pin
)
574 struct pmic_gpio_state
*state
= to_gpio_state(chip
);
575 struct pmic_gpio_pad
*pad
;
577 pad
= state
->ctrl
->desc
->pins
[pin
].drv_data
;
582 static void pmic_gpio_dbg_show(struct seq_file
*s
, struct gpio_chip
*chip
)
584 struct pmic_gpio_state
*state
= to_gpio_state(chip
);
587 for (i
= 0; i
< chip
->ngpio
; i
++) {
588 pmic_gpio_config_dbg_show(state
->ctrl
, s
, i
);
593 static const struct gpio_chip pmic_gpio_gpio_template
= {
594 .direction_input
= pmic_gpio_direction_input
,
595 .direction_output
= pmic_gpio_direction_output
,
596 .get
= pmic_gpio_get
,
597 .set
= pmic_gpio_set
,
598 .request
= pmic_gpio_request
,
599 .free
= pmic_gpio_free
,
600 .of_xlate
= pmic_gpio_of_xlate
,
601 .to_irq
= pmic_gpio_to_irq
,
602 .dbg_show
= pmic_gpio_dbg_show
,
605 static int pmic_gpio_populate(struct pmic_gpio_state
*state
,
606 struct pmic_gpio_pad
*pad
)
608 int type
, subtype
, val
, dir
;
610 type
= pmic_gpio_read(state
, pad
, PMIC_GPIO_REG_TYPE
);
614 if (type
!= PMIC_GPIO_TYPE
) {
615 dev_err(state
->dev
, "incorrect block type 0x%x at 0x%x\n",
620 subtype
= pmic_gpio_read(state
, pad
, PMIC_GPIO_REG_SUBTYPE
);
625 case PMIC_GPIO_SUBTYPE_GPIO_4CH
:
626 pad
->have_buffer
= true;
627 case PMIC_GPIO_SUBTYPE_GPIOC_4CH
:
628 pad
->num_sources
= 4;
630 case PMIC_GPIO_SUBTYPE_GPIO_8CH
:
631 pad
->have_buffer
= true;
632 case PMIC_GPIO_SUBTYPE_GPIOC_8CH
:
633 pad
->num_sources
= 8;
636 dev_err(state
->dev
, "unknown GPIO type 0x%x\n", subtype
);
640 val
= pmic_gpio_read(state
, pad
, PMIC_GPIO_REG_MODE_CTL
);
644 pad
->out_value
= val
& PMIC_GPIO_REG_MODE_VALUE_SHIFT
;
646 dir
= val
>> PMIC_GPIO_REG_MODE_DIR_SHIFT
;
647 dir
&= PMIC_GPIO_REG_MODE_DIR_MASK
;
650 pad
->input_enabled
= true;
651 pad
->output_enabled
= false;
654 pad
->input_enabled
= false;
655 pad
->output_enabled
= true;
658 pad
->input_enabled
= true;
659 pad
->output_enabled
= true;
662 dev_err(state
->dev
, "unknown GPIO direction\n");
666 pad
->function
= val
>> PMIC_GPIO_REG_MODE_FUNCTION_SHIFT
;
667 pad
->function
&= PMIC_GPIO_REG_MODE_FUNCTION_MASK
;
669 val
= pmic_gpio_read(state
, pad
, PMIC_GPIO_REG_DIG_VIN_CTL
);
673 pad
->power_source
= val
>> PMIC_GPIO_REG_VIN_SHIFT
;
674 pad
->power_source
&= PMIC_GPIO_REG_VIN_MASK
;
676 val
= pmic_gpio_read(state
, pad
, PMIC_GPIO_REG_DIG_PULL_CTL
);
680 pad
->pullup
= val
>> PMIC_GPIO_REG_PULL_SHIFT
;
681 pad
->pullup
&= PMIC_GPIO_REG_PULL_MASK
;
683 val
= pmic_gpio_read(state
, pad
, PMIC_GPIO_REG_DIG_OUT_CTL
);
687 pad
->strength
= val
>> PMIC_GPIO_REG_OUT_STRENGTH_SHIFT
;
688 pad
->strength
&= PMIC_GPIO_REG_OUT_STRENGTH_MASK
;
690 pad
->buffer_type
= val
>> PMIC_GPIO_REG_OUT_TYPE_SHIFT
;
691 pad
->buffer_type
&= PMIC_GPIO_REG_OUT_TYPE_MASK
;
693 /* Pin could be disabled with PIN_CONFIG_BIAS_HIGH_IMPEDANCE */
694 pad
->is_enabled
= true;
698 static int pmic_gpio_probe(struct platform_device
*pdev
)
700 struct device
*dev
= &pdev
->dev
;
701 struct pinctrl_pin_desc
*pindesc
;
702 struct pinctrl_desc
*pctrldesc
;
703 struct pmic_gpio_pad
*pad
, *pads
;
704 struct pmic_gpio_state
*state
;
708 ret
= of_property_read_u32_array(dev
->of_node
, "reg", res
, 2);
710 dev_err(dev
, "missing base address and/or range");
714 npins
= res
[1] / PMIC_GPIO_ADDRESS_RANGE
;
719 BUG_ON(npins
> ARRAY_SIZE(pmic_gpio_groups
));
721 state
= devm_kzalloc(dev
, sizeof(*state
), GFP_KERNEL
);
725 platform_set_drvdata(pdev
, state
);
727 state
->dev
= &pdev
->dev
;
728 state
->map
= dev_get_regmap(dev
->parent
, NULL
);
730 pindesc
= devm_kcalloc(dev
, npins
, sizeof(*pindesc
), GFP_KERNEL
);
734 pads
= devm_kcalloc(dev
, npins
, sizeof(*pads
), GFP_KERNEL
);
738 pctrldesc
= devm_kzalloc(dev
, sizeof(*pctrldesc
), GFP_KERNEL
);
742 pctrldesc
->pctlops
= &pmic_gpio_pinctrl_ops
;
743 pctrldesc
->pmxops
= &pmic_gpio_pinmux_ops
;
744 pctrldesc
->confops
= &pmic_gpio_pinconf_ops
;
745 pctrldesc
->owner
= THIS_MODULE
;
746 pctrldesc
->name
= dev_name(dev
);
747 pctrldesc
->pins
= pindesc
;
748 pctrldesc
->npins
= npins
;
749 pctrldesc
->num_custom_params
= ARRAY_SIZE(pmic_gpio_bindings
);
750 pctrldesc
->custom_params
= pmic_gpio_bindings
;
751 #ifdef CONFIG_DEBUG_FS
752 pctrldesc
->custom_conf_items
= pmic_conf_items
;
755 for (i
= 0; i
< npins
; i
++, pindesc
++) {
757 pindesc
->drv_data
= pad
;
759 pindesc
->name
= pmic_gpio_groups
[i
];
761 pad
->irq
= platform_get_irq(pdev
, i
);
765 pad
->base
= res
[0] + i
* PMIC_GPIO_ADDRESS_RANGE
;
767 ret
= pmic_gpio_populate(state
, pad
);
772 state
->chip
= pmic_gpio_gpio_template
;
773 state
->chip
.dev
= dev
;
774 state
->chip
.base
= -1;
775 state
->chip
.ngpio
= npins
;
776 state
->chip
.label
= dev_name(dev
);
777 state
->chip
.of_gpio_n_cells
= 2;
778 state
->chip
.can_sleep
= false;
780 state
->ctrl
= pinctrl_register(pctrldesc
, dev
, state
);
784 ret
= gpiochip_add(&state
->chip
);
786 dev_err(state
->dev
, "can't add gpio chip\n");
790 ret
= gpiochip_add_pin_range(&state
->chip
, dev_name(dev
), 0, 0, npins
);
792 dev_err(dev
, "failed to add pin range\n");
799 gpiochip_remove(&state
->chip
);
801 pinctrl_unregister(state
->ctrl
);
805 static int pmic_gpio_remove(struct platform_device
*pdev
)
807 struct pmic_gpio_state
*state
= platform_get_drvdata(pdev
);
809 gpiochip_remove(&state
->chip
);
810 pinctrl_unregister(state
->ctrl
);
814 static const struct of_device_id pmic_gpio_of_match
[] = {
815 { .compatible
= "qcom,pm8916-gpio" }, /* 4 GPIO's */
816 { .compatible
= "qcom,pm8941-gpio" }, /* 36 GPIO's */
817 { .compatible
= "qcom,pma8084-gpio" }, /* 22 GPIO's */
821 MODULE_DEVICE_TABLE(of
, pmic_gpio_of_match
);
823 static struct platform_driver pmic_gpio_driver
= {
825 .name
= "qcom-spmi-gpio",
826 .of_match_table
= pmic_gpio_of_match
,
828 .probe
= pmic_gpio_probe
,
829 .remove
= pmic_gpio_remove
,
832 module_platform_driver(pmic_gpio_driver
);
834 MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");
835 MODULE_DESCRIPTION("Qualcomm SPMI PMIC GPIO pin control driver");
836 MODULE_ALIAS("platform:qcom-spmi-gpio");
837 MODULE_LICENSE("GPL v2");