1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * ams AS3722 pin control and GPIO driver.
4 *
5 * Copyright (c) 2013, NVIDIA Corporation.
6 *
7 * Author: Laxman Dewangan <ldewangan@nvidia.com>
8 */
9
10 #include <linux/delay.h>
11 #include <linux/gpio/driver.h>
12 #include <linux/kernel.h>
13 #include <linux/mod_devicetable.h>
14 #include <linux/module.h>
15 #include <linux/mfd/as3722.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm.h>
18 #include <linux/property.h>
19 #include <linux/slab.h>
20
21 #include <linux/pinctrl/consumer.h>
22 #include <linux/pinctrl/machine.h>
23 #include <linux/pinctrl/pinctrl.h>
24 #include <linux/pinctrl/pinconf-generic.h>
25 #include <linux/pinctrl/pinconf.h>
26 #include <linux/pinctrl/pinmux.h>
27
28 #include "core.h"
29 #include "pinconf.h"
30 #include "pinctrl-utils.h"
31
32 #define AS3722_PIN_GPIO0 0
33 #define AS3722_PIN_GPIO1 1
34 #define AS3722_PIN_GPIO2 2
35 #define AS3722_PIN_GPIO3 3
36 #define AS3722_PIN_GPIO4 4
37 #define AS3722_PIN_GPIO5 5
38 #define AS3722_PIN_GPIO6 6
39 #define AS3722_PIN_GPIO7 7
40 #define AS3722_PIN_NUM (AS3722_PIN_GPIO7 + 1)
41
42 #define AS3722_GPIO_MODE_PULL_UP BIT(PIN_CONFIG_BIAS_PULL_UP)
43 #define AS3722_GPIO_MODE_PULL_DOWN BIT(PIN_CONFIG_BIAS_PULL_DOWN)
44 #define AS3722_GPIO_MODE_HIGH_IMPED BIT(PIN_CONFIG_BIAS_HIGH_IMPEDANCE)
45 #define AS3722_GPIO_MODE_OPEN_DRAIN BIT(PIN_CONFIG_DRIVE_OPEN_DRAIN)
46
47 struct as3722_pin_function {
48 const char *name;
49 const char * const *groups;
50 unsigned ngroups;
51 int mux_option;
52 };
53
54 struct as3722_gpio_pin_control {
55 unsigned mode_prop;
56 int io_function;
57 };
58
59 struct as3722_pingroup {
60 const char *name;
61 const unsigned pins[1];
62 unsigned npins;
63 };
64
65 struct as3722_pctrl_info {
66 struct device *dev;
67 struct pinctrl_dev *pctl;
68 struct as3722 *as3722;
69 struct gpio_chip gpio_chip;
70 int pins_current_opt[AS3722_PIN_NUM];
71 const struct as3722_pin_function *functions;
72 unsigned num_functions;
73 const struct as3722_pingroup *pin_groups;
74 int num_pin_groups;
75 const struct pinctrl_pin_desc *pins;
76 unsigned num_pins;
77 struct as3722_gpio_pin_control gpio_control[AS3722_PIN_NUM];
78 };
79
80 static const struct pinctrl_pin_desc as3722_pins_desc[] = {
81 PINCTRL_PIN(AS3722_PIN_GPIO0, "gpio0"),
82 PINCTRL_PIN(AS3722_PIN_GPIO1, "gpio1"),
83 PINCTRL_PIN(AS3722_PIN_GPIO2, "gpio2"),
84 PINCTRL_PIN(AS3722_PIN_GPIO3, "gpio3"),
85 PINCTRL_PIN(AS3722_PIN_GPIO4, "gpio4"),
86 PINCTRL_PIN(AS3722_PIN_GPIO5, "gpio5"),
87 PINCTRL_PIN(AS3722_PIN_GPIO6, "gpio6"),
88 PINCTRL_PIN(AS3722_PIN_GPIO7, "gpio7"),
89 };
90
91 static const char * const gpio_groups[] = {
92 "gpio0",
93 "gpio1",
94 "gpio2",
95 "gpio3",
96 "gpio4",
97 "gpio5",
98 "gpio6",
99 "gpio7",
100 };
101
102 enum as3722_pinmux_option {
103 AS3722_PINMUX_GPIO = 0,
104 AS3722_PINMUX_INTERRUPT_OUT = 1,
105 AS3722_PINMUX_VSUB_VBAT_UNDEB_LOW_OUT = 2,
106 AS3722_PINMUX_GPIO_INTERRUPT = 3,
107 AS3722_PINMUX_PWM_INPUT = 4,
108 AS3722_PINMUX_VOLTAGE_IN_STBY = 5,
109 AS3722_PINMUX_OC_PG_SD0 = 6,
110 AS3722_PINMUX_PG_OUT = 7,
111 AS3722_PINMUX_CLK32K_OUT = 8,
112 AS3722_PINMUX_WATCHDOG_INPUT = 9,
113 AS3722_PINMUX_SOFT_RESET_IN = 11,
114 AS3722_PINMUX_PWM_OUTPUT = 12,
115 AS3722_PINMUX_VSUB_VBAT_LOW_DEB_OUT = 13,
116 AS3722_PINMUX_OC_PG_SD6 = 14,
117 };
118
119 #define FUNCTION_GROUP(fname, mux) \
120 { \
121 .name = #fname, \
122 .groups = gpio_groups, \
123 .ngroups = ARRAY_SIZE(gpio_groups), \
124 .mux_option = AS3722_PINMUX_##mux, \
125 }
126
127 static const struct as3722_pin_function as3722_pin_function[] = {
128 FUNCTION_GROUP(gpio, GPIO),
129 FUNCTION_GROUP(interrupt-out, INTERRUPT_OUT),
130 FUNCTION_GROUP(gpio-in-interrupt, GPIO_INTERRUPT),
131 FUNCTION_GROUP(vsup-vbat-low-undebounce-out, VSUB_VBAT_UNDEB_LOW_OUT),
132 FUNCTION_GROUP(vsup-vbat-low-debounce-out, VSUB_VBAT_LOW_DEB_OUT),
133 FUNCTION_GROUP(voltage-in-standby, VOLTAGE_IN_STBY),
134 FUNCTION_GROUP(oc-pg-sd0, OC_PG_SD0),
135 FUNCTION_GROUP(oc-pg-sd6, OC_PG_SD6),
136 FUNCTION_GROUP(powergood-out, PG_OUT),
137 FUNCTION_GROUP(pwm-in, PWM_INPUT),
138 FUNCTION_GROUP(pwm-out, PWM_OUTPUT),
139 FUNCTION_GROUP(clk32k-out, CLK32K_OUT),
140 FUNCTION_GROUP(watchdog-in, WATCHDOG_INPUT),
141 FUNCTION_GROUP(soft-reset-in, SOFT_RESET_IN),
142 };
143
144 #define AS3722_PINGROUP(pg_name, pin_id) \
145 { \
146 .name = #pg_name, \
147 .pins = {AS3722_PIN_##pin_id}, \
148 .npins = 1, \
149 }
150
151 static const struct as3722_pingroup as3722_pingroups[] = {
152 AS3722_PINGROUP(gpio0, GPIO0),
153 AS3722_PINGROUP(gpio1, GPIO1),
154 AS3722_PINGROUP(gpio2, GPIO2),
155 AS3722_PINGROUP(gpio3, GPIO3),
156 AS3722_PINGROUP(gpio4, GPIO4),
157 AS3722_PINGROUP(gpio5, GPIO5),
158 AS3722_PINGROUP(gpio6, GPIO6),
159 AS3722_PINGROUP(gpio7, GPIO7),
160 };
161
as3722_pinctrl_get_groups_count(struct pinctrl_dev * pctldev)162 static int as3722_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
163 {
164 struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
165
166 return as_pci->num_pin_groups;
167 }
168
as3722_pinctrl_get_group_name(struct pinctrl_dev * pctldev,unsigned group)169 static const char *as3722_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
170 unsigned group)
171 {
172 struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
173
174 return as_pci->pin_groups[group].name;
175 }
176
as3722_pinctrl_get_group_pins(struct pinctrl_dev * pctldev,unsigned group,const unsigned ** pins,unsigned * num_pins)177 static int as3722_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
178 unsigned group, const unsigned **pins, unsigned *num_pins)
179 {
180 struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
181
182 *pins = as_pci->pin_groups[group].pins;
183 *num_pins = as_pci->pin_groups[group].npins;
184 return 0;
185 }
186
187 static const struct pinctrl_ops as3722_pinctrl_ops = {
188 .get_groups_count = as3722_pinctrl_get_groups_count,
189 .get_group_name = as3722_pinctrl_get_group_name,
190 .get_group_pins = as3722_pinctrl_get_group_pins,
191 .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
192 .dt_free_map = pinctrl_utils_free_map,
193 };
194
as3722_pinctrl_get_funcs_count(struct pinctrl_dev * pctldev)195 static int as3722_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev)
196 {
197 struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
198
199 return as_pci->num_functions;
200 }
201
as3722_pinctrl_get_func_name(struct pinctrl_dev * pctldev,unsigned function)202 static const char *as3722_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
203 unsigned function)
204 {
205 struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
206
207 return as_pci->functions[function].name;
208 }
209
as3722_pinctrl_get_func_groups(struct pinctrl_dev * pctldev,unsigned function,const char * const ** groups,unsigned * const num_groups)210 static int as3722_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
211 unsigned function, const char * const **groups,
212 unsigned * const num_groups)
213 {
214 struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
215
216 *groups = as_pci->functions[function].groups;
217 *num_groups = as_pci->functions[function].ngroups;
218 return 0;
219 }
220
as3722_pinctrl_set(struct pinctrl_dev * pctldev,unsigned function,unsigned group)221 static int as3722_pinctrl_set(struct pinctrl_dev *pctldev, unsigned function,
222 unsigned group)
223 {
224 struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
225 int gpio_cntr_reg = AS3722_GPIOn_CONTROL_REG(group);
226 u8 val = AS3722_GPIO_IOSF_VAL(as_pci->functions[function].mux_option);
227 int ret;
228
229 dev_dbg(as_pci->dev, "%s(): GPIO %u pin to function %u and val %u\n",
230 __func__, group, function, val);
231
232 ret = as3722_update_bits(as_pci->as3722, gpio_cntr_reg,
233 AS3722_GPIO_IOSF_MASK, val);
234 if (ret < 0) {
235 dev_err(as_pci->dev, "GPIO%d_CTRL_REG update failed %d\n",
236 group, ret);
237 return ret;
238 }
239 as_pci->gpio_control[group].io_function = function;
240
241 switch (val) {
242 case AS3722_GPIO_IOSF_SD0_OUT:
243 case AS3722_GPIO_IOSF_PWR_GOOD_OUT:
244 case AS3722_GPIO_IOSF_Q32K_OUT:
245 case AS3722_GPIO_IOSF_PWM_OUT:
246 case AS3722_GPIO_IOSF_SD6_LOW_VOLT_LOW:
247 ret = as3722_update_bits(as_pci->as3722, gpio_cntr_reg,
248 AS3722_GPIO_MODE_MASK, AS3722_GPIO_MODE_OUTPUT_VDDH);
249 if (ret < 0) {
250 dev_err(as_pci->dev, "GPIO%d_CTRL update failed %d\n",
251 group, ret);
252 return ret;
253 }
254 as_pci->gpio_control[group].mode_prop =
255 AS3722_GPIO_MODE_OUTPUT_VDDH;
256 break;
257 default:
258 break;
259 }
260 return ret;
261 }
262
as3722_pinctrl_gpio_get_mode(unsigned gpio_mode_prop,bool input)263 static int as3722_pinctrl_gpio_get_mode(unsigned gpio_mode_prop, bool input)
264 {
265 if (gpio_mode_prop & AS3722_GPIO_MODE_HIGH_IMPED)
266 return -EINVAL;
267
268 if (gpio_mode_prop & AS3722_GPIO_MODE_OPEN_DRAIN) {
269 if (gpio_mode_prop & AS3722_GPIO_MODE_PULL_UP)
270 return AS3722_GPIO_MODE_IO_OPEN_DRAIN_PULL_UP;
271 return AS3722_GPIO_MODE_IO_OPEN_DRAIN;
272 }
273 if (input) {
274 if (gpio_mode_prop & AS3722_GPIO_MODE_PULL_UP)
275 return AS3722_GPIO_MODE_INPUT_PULL_UP;
276 else if (gpio_mode_prop & AS3722_GPIO_MODE_PULL_DOWN)
277 return AS3722_GPIO_MODE_INPUT_PULL_DOWN;
278 return AS3722_GPIO_MODE_INPUT;
279 }
280 if (gpio_mode_prop & AS3722_GPIO_MODE_PULL_DOWN)
281 return AS3722_GPIO_MODE_OUTPUT_VDDL;
282 return AS3722_GPIO_MODE_OUTPUT_VDDH;
283 }
284
as3722_pinctrl_gpio_request_enable(struct pinctrl_dev * pctldev,struct pinctrl_gpio_range * range,unsigned offset)285 static int as3722_pinctrl_gpio_request_enable(struct pinctrl_dev *pctldev,
286 struct pinctrl_gpio_range *range, unsigned offset)
287 {
288 struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
289
290 if (as_pci->gpio_control[offset].io_function)
291 return -EBUSY;
292 return 0;
293 }
294
as3722_pinctrl_gpio_set_direction(struct pinctrl_dev * pctldev,struct pinctrl_gpio_range * range,unsigned offset,bool input)295 static int as3722_pinctrl_gpio_set_direction(struct pinctrl_dev *pctldev,
296 struct pinctrl_gpio_range *range, unsigned offset, bool input)
297 {
298 struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
299 struct as3722 *as3722 = as_pci->as3722;
300 int mode;
301
302 mode = as3722_pinctrl_gpio_get_mode(
303 as_pci->gpio_control[offset].mode_prop, input);
304 if (mode < 0) {
305 dev_err(as_pci->dev, "%s direction for GPIO %d not supported\n",
306 (input) ? "Input" : "Output", offset);
307 return mode;
308 }
309
310 return as3722_update_bits(as3722, AS3722_GPIOn_CONTROL_REG(offset),
311 AS3722_GPIO_MODE_MASK, mode);
312 }
313
314 static const struct pinmux_ops as3722_pinmux_ops = {
315 .get_functions_count = as3722_pinctrl_get_funcs_count,
316 .get_function_name = as3722_pinctrl_get_func_name,
317 .get_function_groups = as3722_pinctrl_get_func_groups,
318 .set_mux = as3722_pinctrl_set,
319 .gpio_request_enable = as3722_pinctrl_gpio_request_enable,
320 .gpio_set_direction = as3722_pinctrl_gpio_set_direction,
321 };
322
as3722_pinconf_get(struct pinctrl_dev * pctldev,unsigned pin,unsigned long * config)323 static int as3722_pinconf_get(struct pinctrl_dev *pctldev,
324 unsigned pin, unsigned long *config)
325 {
326 struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
327 enum pin_config_param param = pinconf_to_config_param(*config);
328 int arg = 0;
329 u16 prop;
330
331 switch (param) {
332 case PIN_CONFIG_BIAS_DISABLE:
333 prop = AS3722_GPIO_MODE_PULL_UP |
334 AS3722_GPIO_MODE_PULL_DOWN;
335 if (!(as_pci->gpio_control[pin].mode_prop & prop))
336 arg = 1;
337 prop = 0;
338 break;
339
340 case PIN_CONFIG_BIAS_PULL_UP:
341 prop = AS3722_GPIO_MODE_PULL_UP;
342 break;
343
344 case PIN_CONFIG_BIAS_PULL_DOWN:
345 prop = AS3722_GPIO_MODE_PULL_DOWN;
346 break;
347
348 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
349 prop = AS3722_GPIO_MODE_OPEN_DRAIN;
350 break;
351
352 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
353 prop = AS3722_GPIO_MODE_HIGH_IMPED;
354 break;
355
356 default:
357 dev_err(as_pci->dev, "Properties not supported\n");
358 return -ENOTSUPP;
359 }
360
361 if (as_pci->gpio_control[pin].mode_prop & prop)
362 arg = 1;
363
364 *config = pinconf_to_config_packed(param, (u16)arg);
365 return 0;
366 }
367
as3722_pinconf_set(struct pinctrl_dev * pctldev,unsigned pin,unsigned long * configs,unsigned num_configs)368 static int as3722_pinconf_set(struct pinctrl_dev *pctldev,
369 unsigned pin, unsigned long *configs,
370 unsigned num_configs)
371 {
372 struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
373 enum pin_config_param param;
374 int mode_prop;
375 int i;
376
377 for (i = 0; i < num_configs; i++) {
378 param = pinconf_to_config_param(configs[i]);
379 mode_prop = as_pci->gpio_control[pin].mode_prop;
380
381 switch (param) {
382 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
383 break;
384
385 case PIN_CONFIG_BIAS_DISABLE:
386 mode_prop &= ~(AS3722_GPIO_MODE_PULL_UP |
387 AS3722_GPIO_MODE_PULL_DOWN);
388 break;
389 case PIN_CONFIG_BIAS_PULL_UP:
390 mode_prop |= AS3722_GPIO_MODE_PULL_UP;
391 break;
392
393 case PIN_CONFIG_BIAS_PULL_DOWN:
394 mode_prop |= AS3722_GPIO_MODE_PULL_DOWN;
395 break;
396
397 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
398 mode_prop |= AS3722_GPIO_MODE_HIGH_IMPED;
399 break;
400
401 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
402 mode_prop |= AS3722_GPIO_MODE_OPEN_DRAIN;
403 break;
404
405 default:
406 dev_err(as_pci->dev, "Properties not supported\n");
407 return -ENOTSUPP;
408 }
409
410 as_pci->gpio_control[pin].mode_prop = mode_prop;
411 }
412 return 0;
413 }
414
415 static const struct pinconf_ops as3722_pinconf_ops = {
416 .pin_config_get = as3722_pinconf_get,
417 .pin_config_set = as3722_pinconf_set,
418 };
419
420 static struct pinctrl_desc as3722_pinctrl_desc = {
421 .pctlops = &as3722_pinctrl_ops,
422 .pmxops = &as3722_pinmux_ops,
423 .confops = &as3722_pinconf_ops,
424 .owner = THIS_MODULE,
425 };
426
as3722_gpio_get(struct gpio_chip * chip,unsigned offset)427 static int as3722_gpio_get(struct gpio_chip *chip, unsigned offset)
428 {
429 struct as3722_pctrl_info *as_pci = gpiochip_get_data(chip);
430 struct as3722 *as3722 = as_pci->as3722;
431 int ret;
432 u32 reg;
433 u32 control;
434 u32 val;
435 int mode;
436 int invert_enable;
437
438 ret = as3722_read(as3722, AS3722_GPIOn_CONTROL_REG(offset), &control);
439 if (ret < 0) {
440 dev_err(as_pci->dev,
441 "GPIO_CONTROL%d_REG read failed: %d\n", offset, ret);
442 return ret;
443 }
444
445 invert_enable = !!(control & AS3722_GPIO_INV);
446 mode = control & AS3722_GPIO_MODE_MASK;
447 switch (mode) {
448 case AS3722_GPIO_MODE_INPUT:
449 case AS3722_GPIO_MODE_INPUT_PULL_UP:
450 case AS3722_GPIO_MODE_INPUT_PULL_DOWN:
451 case AS3722_GPIO_MODE_IO_OPEN_DRAIN:
452 case AS3722_GPIO_MODE_IO_OPEN_DRAIN_PULL_UP:
453 reg = AS3722_GPIO_SIGNAL_IN_REG;
454 break;
455 case AS3722_GPIO_MODE_OUTPUT_VDDH:
456 case AS3722_GPIO_MODE_OUTPUT_VDDL:
457 reg = AS3722_GPIO_SIGNAL_OUT_REG;
458 break;
459 default:
460 return -EINVAL;
461 }
462
463 ret = as3722_read(as3722, reg, &val);
464 if (ret < 0) {
465 dev_err(as_pci->dev,
466 "GPIO_SIGNAL_IN_REG read failed: %d\n", ret);
467 return ret;
468 }
469
470 val = !!(val & AS3722_GPIOn_SIGNAL(offset));
471 return (invert_enable) ? !val : val;
472 }
473
as3722_gpio_set(struct gpio_chip * chip,unsigned offset,int value)474 static void as3722_gpio_set(struct gpio_chip *chip, unsigned offset,
475 int value)
476 {
477 struct as3722_pctrl_info *as_pci = gpiochip_get_data(chip);
478 struct as3722 *as3722 = as_pci->as3722;
479 int en_invert;
480 u32 val;
481 int ret;
482
483 ret = as3722_read(as3722, AS3722_GPIOn_CONTROL_REG(offset), &val);
484 if (ret < 0) {
485 dev_err(as_pci->dev,
486 "GPIO_CONTROL%d_REG read failed: %d\n", offset, ret);
487 return;
488 }
489 en_invert = !!(val & AS3722_GPIO_INV);
490
491 if (value)
492 val = (en_invert) ? 0 : AS3722_GPIOn_SIGNAL(offset);
493 else
494 val = (en_invert) ? AS3722_GPIOn_SIGNAL(offset) : 0;
495
496 ret = as3722_update_bits(as3722, AS3722_GPIO_SIGNAL_OUT_REG,
497 AS3722_GPIOn_SIGNAL(offset), val);
498 if (ret < 0)
499 dev_err(as_pci->dev,
500 "GPIO_SIGNAL_OUT_REG update failed: %d\n", ret);
501 }
502
as3722_gpio_direction_input(struct gpio_chip * chip,unsigned offset)503 static int as3722_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
504 {
505 return pinctrl_gpio_direction_input(chip->base + offset);
506 }
507
as3722_gpio_direction_output(struct gpio_chip * chip,unsigned offset,int value)508 static int as3722_gpio_direction_output(struct gpio_chip *chip,
509 unsigned offset, int value)
510 {
511 as3722_gpio_set(chip, offset, value);
512 return pinctrl_gpio_direction_output(chip->base + offset);
513 }
514
as3722_gpio_to_irq(struct gpio_chip * chip,unsigned offset)515 static int as3722_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
516 {
517 struct as3722_pctrl_info *as_pci = gpiochip_get_data(chip);
518
519 return as3722_irq_get_virq(as_pci->as3722, offset);
520 }
521
522 static const struct gpio_chip as3722_gpio_chip = {
523 .label = "as3722-gpio",
524 .owner = THIS_MODULE,
525 .request = gpiochip_generic_request,
526 .free = gpiochip_generic_free,
527 .get = as3722_gpio_get,
528 .set = as3722_gpio_set,
529 .direction_input = as3722_gpio_direction_input,
530 .direction_output = as3722_gpio_direction_output,
531 .to_irq = as3722_gpio_to_irq,
532 .can_sleep = true,
533 .ngpio = AS3722_PIN_NUM,
534 .base = -1,
535 };
536
as3722_pinctrl_probe(struct platform_device * pdev)537 static int as3722_pinctrl_probe(struct platform_device *pdev)
538 {
539 struct as3722_pctrl_info *as_pci;
540 int ret;
541
542 device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));
543
544 as_pci = devm_kzalloc(&pdev->dev, sizeof(*as_pci), GFP_KERNEL);
545 if (!as_pci)
546 return -ENOMEM;
547
548 as_pci->dev = &pdev->dev;
549 as_pci->as3722 = dev_get_drvdata(pdev->dev.parent);
550 platform_set_drvdata(pdev, as_pci);
551
552 as_pci->pins = as3722_pins_desc;
553 as_pci->num_pins = ARRAY_SIZE(as3722_pins_desc);
554 as_pci->functions = as3722_pin_function;
555 as_pci->num_functions = ARRAY_SIZE(as3722_pin_function);
556 as_pci->pin_groups = as3722_pingroups;
557 as_pci->num_pin_groups = ARRAY_SIZE(as3722_pingroups);
558 as3722_pinctrl_desc.name = dev_name(&pdev->dev);
559 as3722_pinctrl_desc.pins = as3722_pins_desc;
560 as3722_pinctrl_desc.npins = ARRAY_SIZE(as3722_pins_desc);
561 as_pci->pctl = devm_pinctrl_register(&pdev->dev, &as3722_pinctrl_desc,
562 as_pci);
563 if (IS_ERR(as_pci->pctl)) {
564 dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
565 return PTR_ERR(as_pci->pctl);
566 }
567
568 as_pci->gpio_chip = as3722_gpio_chip;
569 as_pci->gpio_chip.parent = &pdev->dev;
570 ret = gpiochip_add_data(&as_pci->gpio_chip, as_pci);
571 if (ret < 0) {
572 dev_err(&pdev->dev, "Couldn't register gpiochip, %d\n", ret);
573 return ret;
574 }
575
576 ret = gpiochip_add_pin_range(&as_pci->gpio_chip, dev_name(&pdev->dev),
577 0, 0, AS3722_PIN_NUM);
578 if (ret < 0) {
579 dev_err(&pdev->dev, "Couldn't add pin range, %d\n", ret);
580 goto fail_range_add;
581 }
582
583 return 0;
584
585 fail_range_add:
586 gpiochip_remove(&as_pci->gpio_chip);
587 return ret;
588 }
589
as3722_pinctrl_remove(struct platform_device * pdev)590 static int as3722_pinctrl_remove(struct platform_device *pdev)
591 {
592 struct as3722_pctrl_info *as_pci = platform_get_drvdata(pdev);
593
594 gpiochip_remove(&as_pci->gpio_chip);
595 return 0;
596 }
597
598 static const struct of_device_id as3722_pinctrl_of_match[] = {
599 { .compatible = "ams,as3722-pinctrl", },
600 { },
601 };
602 MODULE_DEVICE_TABLE(of, as3722_pinctrl_of_match);
603
604 static struct platform_driver as3722_pinctrl_driver = {
605 .driver = {
606 .name = "as3722-pinctrl",
607 .of_match_table = as3722_pinctrl_of_match,
608 },
609 .probe = as3722_pinctrl_probe,
610 .remove = as3722_pinctrl_remove,
611 };
612 module_platform_driver(as3722_pinctrl_driver);
613
614 MODULE_ALIAS("platform:as3722-pinctrl");
615 MODULE_DESCRIPTION("AS3722 pin control and GPIO driver");
616 MODULE_AUTHOR("Laxman Dewangan<ldewangan@nvidia.com>");
617 MODULE_LICENSE("GPL v2");
618