4 * Copyright (c) 2014,2015 AMD Corporation.
5 * Authors: Ken Xue <Ken.Xue@amd.com>
6 * Wu, Jeff <Jeff.Wu@amd.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms and conditions of the GNU General Public License,
10 * version 2, as published by the Free Software Foundation.
12 * Contact Information: Nehal Shah <Nehal-bakulchandra.Shah@amd.com>
13 * Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
17 #include <linux/err.h>
18 #include <linux/bug.h>
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/spinlock.h>
22 #include <linux/compiler.h>
23 #include <linux/types.h>
24 #include <linux/errno.h>
25 #include <linux/log2.h>
27 #include <linux/gpio.h>
28 #include <linux/slab.h>
29 #include <linux/platform_device.h>
30 #include <linux/mutex.h>
31 #include <linux/acpi.h>
32 #include <linux/seq_file.h>
33 #include <linux/interrupt.h>
34 #include <linux/list.h>
35 #include <linux/bitops.h>
36 #include <linux/pinctrl/pinconf.h>
37 #include <linux/pinctrl/pinconf-generic.h>
40 #include "pinctrl-utils.h"
41 #include "pinctrl-amd.h"
43 static int amd_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
47 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
49 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
50 pin_reg = readl(gpio_dev->base + offset * 4);
51 pin_reg &= ~BIT(OUTPUT_ENABLE_OFF);
52 writel(pin_reg, gpio_dev->base + offset * 4);
53 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
58 static int amd_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
63 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
65 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
66 pin_reg = readl(gpio_dev->base + offset * 4);
67 pin_reg |= BIT(OUTPUT_ENABLE_OFF);
69 pin_reg |= BIT(OUTPUT_VALUE_OFF);
71 pin_reg &= ~BIT(OUTPUT_VALUE_OFF);
72 writel(pin_reg, gpio_dev->base + offset * 4);
73 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
78 static int amd_gpio_get_value(struct gpio_chip *gc, unsigned offset)
82 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
84 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
85 pin_reg = readl(gpio_dev->base + offset * 4);
86 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
88 return !!(pin_reg & BIT(PIN_STS_OFF));
91 static void amd_gpio_set_value(struct gpio_chip *gc, unsigned offset, int value)
95 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
97 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
98 pin_reg = readl(gpio_dev->base + offset * 4);
100 pin_reg |= BIT(OUTPUT_VALUE_OFF);
102 pin_reg &= ~BIT(OUTPUT_VALUE_OFF);
103 writel(pin_reg, gpio_dev->base + offset * 4);
104 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
107 static int amd_gpio_set_debounce(struct gpio_chip *gc, unsigned offset,
114 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
116 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
117 pin_reg = readl(gpio_dev->base + offset * 4);
120 pin_reg |= DB_TYPE_REMOVE_GLITCH << DB_CNTRL_OFF;
121 pin_reg &= ~DB_TMR_OUT_MASK;
123 Debounce Debounce Timer Max
124 TmrLarge TmrOutUnit Unit Debounce
126 0 0 61 usec (2 RtcClk) 976 usec
127 0 1 244 usec (8 RtcClk) 3.9 msec
128 1 0 15.6 msec (512 RtcClk) 250 msec
129 1 1 62.5 msec (2048 RtcClk) 1 sec
134 pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
135 pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
136 } else if (debounce < 976) {
137 time = debounce / 61;
138 pin_reg |= time & DB_TMR_OUT_MASK;
139 pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
140 pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
141 } else if (debounce < 3900) {
142 time = debounce / 244;
143 pin_reg |= time & DB_TMR_OUT_MASK;
144 pin_reg |= BIT(DB_TMR_OUT_UNIT_OFF);
145 pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
146 } else if (debounce < 250000) {
147 time = debounce / 15625;
148 pin_reg |= time & DB_TMR_OUT_MASK;
149 pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
150 pin_reg |= BIT(DB_TMR_LARGE_OFF);
151 } else if (debounce < 1000000) {
152 time = debounce / 62500;
153 pin_reg |= time & DB_TMR_OUT_MASK;
154 pin_reg |= BIT(DB_TMR_OUT_UNIT_OFF);
155 pin_reg |= BIT(DB_TMR_LARGE_OFF);
157 pin_reg &= ~(DB_CNTRl_MASK << DB_CNTRL_OFF);
161 pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
162 pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
163 pin_reg &= ~DB_TMR_OUT_MASK;
164 pin_reg &= ~(DB_CNTRl_MASK << DB_CNTRL_OFF);
166 writel(pin_reg, gpio_dev->base + offset * 4);
167 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
172 static int amd_gpio_set_config(struct gpio_chip *gc, unsigned offset,
173 unsigned long config)
177 if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
180 debounce = pinconf_to_config_argument(config);
181 return amd_gpio_set_debounce(gc, offset, debounce);
184 #ifdef CONFIG_DEBUG_FS
185 static void amd_gpio_dbg_show(struct seq_file *s, struct gpio_chip *gc)
189 unsigned int bank, i, pin_num;
190 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
194 char *interrupt_enable;
195 char *interrupt_mask;
201 char *pull_up_enable;
202 char *pull_down_enable;
206 for (bank = 0; bank < gpio_dev->hwbank_num; bank++) {
207 seq_printf(s, "GPIO bank%d\t", bank);
212 pin_num = AMD_GPIO_PINS_BANK0;
216 pin_num = AMD_GPIO_PINS_BANK1 + i;
220 pin_num = AMD_GPIO_PINS_BANK2 + i;
224 pin_num = AMD_GPIO_PINS_BANK3 + i;
227 /* Illegal bank number, ignore */
230 for (; i < pin_num; i++) {
231 seq_printf(s, "pin%d\t", i);
232 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
233 pin_reg = readl(gpio_dev->base + i * 4);
234 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
236 if (pin_reg & BIT(INTERRUPT_ENABLE_OFF)) {
237 interrupt_enable = "interrupt is enabled|";
239 if (!(pin_reg & BIT(ACTIVE_LEVEL_OFF)) &&
240 !(pin_reg & BIT(ACTIVE_LEVEL_OFF + 1)))
241 active_level = "Active low|";
242 else if (pin_reg & BIT(ACTIVE_LEVEL_OFF) &&
243 !(pin_reg & BIT(ACTIVE_LEVEL_OFF + 1)))
244 active_level = "Active high|";
245 else if (!(pin_reg & BIT(ACTIVE_LEVEL_OFF)) &&
246 pin_reg & BIT(ACTIVE_LEVEL_OFF + 1))
247 active_level = "Active on both|";
249 active_level = "Unknown Active level|";
251 if (pin_reg & BIT(LEVEL_TRIG_OFF))
252 level_trig = "Level trigger|";
254 level_trig = "Edge trigger|";
258 "interrupt is disabled|";
263 if (pin_reg & BIT(INTERRUPT_MASK_OFF))
265 "interrupt is unmasked|";
268 "interrupt is masked|";
270 if (pin_reg & BIT(WAKE_CNTRL_OFF_S0I3))
271 wake_cntrl0 = "enable wakeup in S0i3 state|";
273 wake_cntrl0 = "disable wakeup in S0i3 state|";
275 if (pin_reg & BIT(WAKE_CNTRL_OFF_S3))
276 wake_cntrl1 = "enable wakeup in S3 state|";
278 wake_cntrl1 = "disable wakeup in S3 state|";
280 if (pin_reg & BIT(WAKE_CNTRL_OFF_S4))
281 wake_cntrl2 = "enable wakeup in S4/S5 state|";
283 wake_cntrl2 = "disable wakeup in S4/S5 state|";
285 if (pin_reg & BIT(PULL_UP_ENABLE_OFF)) {
286 pull_up_enable = "pull-up is enabled|";
287 if (pin_reg & BIT(PULL_UP_SEL_OFF))
288 pull_up_sel = "8k pull-up|";
290 pull_up_sel = "4k pull-up|";
292 pull_up_enable = "pull-up is disabled|";
296 if (pin_reg & BIT(PULL_DOWN_ENABLE_OFF))
297 pull_down_enable = "pull-down is enabled|";
299 pull_down_enable = "Pull-down is disabled|";
301 if (pin_reg & BIT(OUTPUT_ENABLE_OFF)) {
303 output_enable = "output is enabled|";
304 if (pin_reg & BIT(OUTPUT_VALUE_OFF))
305 output_value = "output is high|";
307 output_value = "output is low|";
309 output_enable = "output is disabled|";
312 if (pin_reg & BIT(PIN_STS_OFF))
313 pin_sts = "input is high|";
315 pin_sts = "input is low|";
318 seq_printf(s, "%s %s %s %s %s %s\n"
319 " %s %s %s %s %s %s %s 0x%x\n",
320 level_trig, active_level, interrupt_enable,
321 interrupt_mask, wake_cntrl0, wake_cntrl1,
322 wake_cntrl2, pin_sts, pull_up_sel,
323 pull_up_enable, pull_down_enable,
324 output_value, output_enable, pin_reg);
329 #define amd_gpio_dbg_show NULL
332 static void amd_gpio_irq_enable(struct irq_data *d)
336 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
337 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
339 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
340 pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
341 pin_reg |= BIT(INTERRUPT_ENABLE_OFF);
342 pin_reg |= BIT(INTERRUPT_MASK_OFF);
343 writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
344 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
347 static void amd_gpio_irq_disable(struct irq_data *d)
351 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
352 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
354 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
355 pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
356 pin_reg &= ~BIT(INTERRUPT_ENABLE_OFF);
357 pin_reg &= ~BIT(INTERRUPT_MASK_OFF);
358 writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
359 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
362 static void amd_gpio_irq_mask(struct irq_data *d)
366 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
367 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
369 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
370 pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
371 pin_reg &= ~BIT(INTERRUPT_MASK_OFF);
372 writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
373 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
376 static void amd_gpio_irq_unmask(struct irq_data *d)
380 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
381 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
383 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
384 pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
385 pin_reg |= BIT(INTERRUPT_MASK_OFF);
386 writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
387 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
390 static void amd_gpio_irq_eoi(struct irq_data *d)
394 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
395 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
397 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
398 reg = readl(gpio_dev->base + WAKE_INT_MASTER_REG);
400 writel(reg, gpio_dev->base + WAKE_INT_MASTER_REG);
401 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
404 static int amd_gpio_irq_set_type(struct irq_data *d, unsigned int type)
408 unsigned long flags, irq_flags;
409 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
410 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
412 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
413 pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
415 /* Ignore the settings coming from the client and
416 * read the values from the ACPI tables
417 * while setting the trigger type
420 irq_flags = irq_get_trigger_type(d->irq);
421 if (irq_flags != IRQ_TYPE_NONE)
424 switch (type & IRQ_TYPE_SENSE_MASK) {
425 case IRQ_TYPE_EDGE_RISING:
426 pin_reg &= ~BIT(LEVEL_TRIG_OFF);
427 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
428 pin_reg |= ACTIVE_HIGH << ACTIVE_LEVEL_OFF;
429 irq_set_handler_locked(d, handle_edge_irq);
432 case IRQ_TYPE_EDGE_FALLING:
433 pin_reg &= ~BIT(LEVEL_TRIG_OFF);
434 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
435 pin_reg |= ACTIVE_LOW << ACTIVE_LEVEL_OFF;
436 irq_set_handler_locked(d, handle_edge_irq);
439 case IRQ_TYPE_EDGE_BOTH:
440 pin_reg &= ~BIT(LEVEL_TRIG_OFF);
441 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
442 pin_reg |= BOTH_EADGE << ACTIVE_LEVEL_OFF;
443 irq_set_handler_locked(d, handle_edge_irq);
446 case IRQ_TYPE_LEVEL_HIGH:
447 pin_reg |= LEVEL_TRIGGER << LEVEL_TRIG_OFF;
448 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
449 pin_reg |= ACTIVE_HIGH << ACTIVE_LEVEL_OFF;
450 irq_set_handler_locked(d, handle_level_irq);
453 case IRQ_TYPE_LEVEL_LOW:
454 pin_reg |= LEVEL_TRIGGER << LEVEL_TRIG_OFF;
455 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
456 pin_reg |= ACTIVE_LOW << ACTIVE_LEVEL_OFF;
457 irq_set_handler_locked(d, handle_level_irq);
464 dev_err(&gpio_dev->pdev->dev, "Invalid type value\n");
468 pin_reg |= CLR_INTR_STAT << INTERRUPT_STS_OFF;
469 writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
470 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
475 static void amd_irq_ack(struct irq_data *d)
478 * based on HW design,there is no need to ack HW
479 * before handle current irq. But this routine is
480 * necessary for handle_edge_irq
484 static struct irq_chip amd_gpio_irqchip = {
486 .irq_ack = amd_irq_ack,
487 .irq_enable = amd_gpio_irq_enable,
488 .irq_disable = amd_gpio_irq_disable,
489 .irq_mask = amd_gpio_irq_mask,
490 .irq_unmask = amd_gpio_irq_unmask,
491 .irq_eoi = amd_gpio_irq_eoi,
492 .irq_set_type = amd_gpio_irq_set_type,
493 .flags = IRQCHIP_SKIP_SET_WAKE,
496 #define PIN_IRQ_PENDING (BIT(INTERRUPT_STS_OFF) | BIT(WAKE_STS_OFF))
498 static irqreturn_t amd_gpio_irq_handler(int irq, void *dev_id)
500 struct amd_gpio *gpio_dev = dev_id;
501 struct gpio_chip *gc = &gpio_dev->gc;
502 irqreturn_t ret = IRQ_NONE;
503 unsigned int i, irqnr;
509 /* Read the wake status */
510 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
511 status = readl(gpio_dev->base + WAKE_INT_STATUS_REG1);
513 status |= readl(gpio_dev->base + WAKE_INT_STATUS_REG0);
514 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
516 /* Bit 0-45 contain the relevant status bits */
517 status &= (1ULL << 46) - 1;
518 regs = gpio_dev->base;
519 for (mask = 1, irqnr = 0; status; mask <<= 1, regs += 4, irqnr += 4) {
520 if (!(status & mask))
524 /* Each status bit covers four pins */
525 for (i = 0; i < 4; i++) {
526 regval = readl(regs + i);
527 if (!(regval & PIN_IRQ_PENDING) ||
528 !(regval & BIT(INTERRUPT_MASK_OFF)))
530 irq = irq_find_mapping(gc->irqdomain, irqnr + i);
531 generic_handle_irq(irq);
534 * We must read the pin register again, in case the
535 * value was changed while executing
536 * generic_handle_irq() above.
538 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
539 regval = readl(regs + i);
540 writel(regval, regs + i);
541 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
546 /* Signal EOI to the GPIO unit */
547 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
548 regval = readl(gpio_dev->base + WAKE_INT_MASTER_REG);
550 writel(regval, gpio_dev->base + WAKE_INT_MASTER_REG);
551 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
556 static int amd_get_groups_count(struct pinctrl_dev *pctldev)
558 struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
560 return gpio_dev->ngroups;
563 static const char *amd_get_group_name(struct pinctrl_dev *pctldev,
566 struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
568 return gpio_dev->groups[group].name;
571 static int amd_get_group_pins(struct pinctrl_dev *pctldev,
573 const unsigned **pins,
576 struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
578 *pins = gpio_dev->groups[group].pins;
579 *num_pins = gpio_dev->groups[group].npins;
583 static const struct pinctrl_ops amd_pinctrl_ops = {
584 .get_groups_count = amd_get_groups_count,
585 .get_group_name = amd_get_group_name,
586 .get_group_pins = amd_get_group_pins,
588 .dt_node_to_map = pinconf_generic_dt_node_to_map_group,
589 .dt_free_map = pinctrl_utils_free_map,
593 static int amd_pinconf_get(struct pinctrl_dev *pctldev,
595 unsigned long *config)
600 struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
601 enum pin_config_param param = pinconf_to_config_param(*config);
603 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
604 pin_reg = readl(gpio_dev->base + pin*4);
605 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
607 case PIN_CONFIG_INPUT_DEBOUNCE:
608 arg = pin_reg & DB_TMR_OUT_MASK;
611 case PIN_CONFIG_BIAS_PULL_DOWN:
612 arg = (pin_reg >> PULL_DOWN_ENABLE_OFF) & BIT(0);
615 case PIN_CONFIG_BIAS_PULL_UP:
616 arg = (pin_reg >> PULL_UP_SEL_OFF) & (BIT(0) | BIT(1));
619 case PIN_CONFIG_DRIVE_STRENGTH:
620 arg = (pin_reg >> DRV_STRENGTH_SEL_OFF) & DRV_STRENGTH_SEL_MASK;
624 dev_err(&gpio_dev->pdev->dev, "Invalid config param %04x\n",
629 *config = pinconf_to_config_packed(param, arg);
634 static int amd_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
635 unsigned long *configs, unsigned num_configs)
642 enum pin_config_param param;
643 struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
645 raw_spin_lock_irqsave(&gpio_dev->lock, flags);
646 for (i = 0; i < num_configs; i++) {
647 param = pinconf_to_config_param(configs[i]);
648 arg = pinconf_to_config_argument(configs[i]);
649 pin_reg = readl(gpio_dev->base + pin*4);
652 case PIN_CONFIG_INPUT_DEBOUNCE:
653 pin_reg &= ~DB_TMR_OUT_MASK;
654 pin_reg |= arg & DB_TMR_OUT_MASK;
657 case PIN_CONFIG_BIAS_PULL_DOWN:
658 pin_reg &= ~BIT(PULL_DOWN_ENABLE_OFF);
659 pin_reg |= (arg & BIT(0)) << PULL_DOWN_ENABLE_OFF;
662 case PIN_CONFIG_BIAS_PULL_UP:
663 pin_reg &= ~BIT(PULL_UP_SEL_OFF);
664 pin_reg |= (arg & BIT(0)) << PULL_UP_SEL_OFF;
665 pin_reg &= ~BIT(PULL_UP_ENABLE_OFF);
666 pin_reg |= ((arg>>1) & BIT(0)) << PULL_UP_ENABLE_OFF;
669 case PIN_CONFIG_DRIVE_STRENGTH:
670 pin_reg &= ~(DRV_STRENGTH_SEL_MASK
671 << DRV_STRENGTH_SEL_OFF);
672 pin_reg |= (arg & DRV_STRENGTH_SEL_MASK)
673 << DRV_STRENGTH_SEL_OFF;
677 dev_err(&gpio_dev->pdev->dev,
678 "Invalid config param %04x\n", param);
682 writel(pin_reg, gpio_dev->base + pin*4);
684 raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
689 static int amd_pinconf_group_get(struct pinctrl_dev *pctldev,
691 unsigned long *config)
693 const unsigned *pins;
697 ret = amd_get_group_pins(pctldev, group, &pins, &npins);
701 if (amd_pinconf_get(pctldev, pins[0], config))
707 static int amd_pinconf_group_set(struct pinctrl_dev *pctldev,
708 unsigned group, unsigned long *configs,
709 unsigned num_configs)
711 const unsigned *pins;
715 ret = amd_get_group_pins(pctldev, group, &pins, &npins);
718 for (i = 0; i < npins; i++) {
719 if (amd_pinconf_set(pctldev, pins[i], configs, num_configs))
725 static const struct pinconf_ops amd_pinconf_ops = {
726 .pin_config_get = amd_pinconf_get,
727 .pin_config_set = amd_pinconf_set,
728 .pin_config_group_get = amd_pinconf_group_get,
729 .pin_config_group_set = amd_pinconf_group_set,
732 #ifdef CONFIG_PM_SLEEP
733 static bool amd_gpio_should_save(struct amd_gpio *gpio_dev, unsigned int pin)
735 const struct pin_desc *pd = pin_desc_get(gpio_dev->pctrl, pin);
741 * Only restore the pin if it is actually in use by the kernel (or
744 if (pd->mux_owner || pd->gpio_owner ||
745 gpiochip_line_is_irq(&gpio_dev->gc, pin))
751 int amd_gpio_suspend(struct device *dev)
753 struct platform_device *pdev = to_platform_device(dev);
754 struct amd_gpio *gpio_dev = platform_get_drvdata(pdev);
755 struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
758 for (i = 0; i < desc->npins; i++) {
759 int pin = desc->pins[i].number;
761 if (!amd_gpio_should_save(gpio_dev, pin))
764 gpio_dev->saved_regs[i] = readl(gpio_dev->base + pin*4);
770 int amd_gpio_resume(struct device *dev)
772 struct platform_device *pdev = to_platform_device(dev);
773 struct amd_gpio *gpio_dev = platform_get_drvdata(pdev);
774 struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
777 for (i = 0; i < desc->npins; i++) {
778 int pin = desc->pins[i].number;
780 if (!amd_gpio_should_save(gpio_dev, pin))
783 writel(gpio_dev->saved_regs[i], gpio_dev->base + pin*4);
789 static const struct dev_pm_ops amd_gpio_pm_ops = {
790 SET_LATE_SYSTEM_SLEEP_PM_OPS(amd_gpio_suspend,
795 static struct pinctrl_desc amd_pinctrl_desc = {
797 .npins = ARRAY_SIZE(kerncz_pins),
798 .pctlops = &amd_pinctrl_ops,
799 .confops = &amd_pinconf_ops,
800 .owner = THIS_MODULE,
803 static int amd_gpio_probe(struct platform_device *pdev)
807 struct resource *res;
808 struct amd_gpio *gpio_dev;
810 gpio_dev = devm_kzalloc(&pdev->dev,
811 sizeof(struct amd_gpio), GFP_KERNEL);
815 raw_spin_lock_init(&gpio_dev->lock);
817 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
819 dev_err(&pdev->dev, "Failed to get gpio io resource.\n");
823 gpio_dev->base = devm_ioremap_nocache(&pdev->dev, res->start,
828 irq_base = platform_get_irq(pdev, 0);
830 dev_err(&pdev->dev, "Failed to get gpio IRQ: %d\n", irq_base);
834 #ifdef CONFIG_PM_SLEEP
835 gpio_dev->saved_regs = devm_kcalloc(&pdev->dev, amd_pinctrl_desc.npins,
836 sizeof(*gpio_dev->saved_regs),
838 if (!gpio_dev->saved_regs)
842 gpio_dev->pdev = pdev;
843 gpio_dev->gc.direction_input = amd_gpio_direction_input;
844 gpio_dev->gc.direction_output = amd_gpio_direction_output;
845 gpio_dev->gc.get = amd_gpio_get_value;
846 gpio_dev->gc.set = amd_gpio_set_value;
847 gpio_dev->gc.set_config = amd_gpio_set_config;
848 gpio_dev->gc.dbg_show = amd_gpio_dbg_show;
850 gpio_dev->gc.base = -1;
851 gpio_dev->gc.label = pdev->name;
852 gpio_dev->gc.owner = THIS_MODULE;
853 gpio_dev->gc.parent = &pdev->dev;
854 gpio_dev->gc.ngpio = resource_size(res) / 4;
855 #if defined(CONFIG_OF_GPIO)
856 gpio_dev->gc.of_node = pdev->dev.of_node;
859 gpio_dev->hwbank_num = gpio_dev->gc.ngpio / 64;
860 gpio_dev->groups = kerncz_groups;
861 gpio_dev->ngroups = ARRAY_SIZE(kerncz_groups);
863 amd_pinctrl_desc.name = dev_name(&pdev->dev);
864 gpio_dev->pctrl = devm_pinctrl_register(&pdev->dev, &amd_pinctrl_desc,
866 if (IS_ERR(gpio_dev->pctrl)) {
867 dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
868 return PTR_ERR(gpio_dev->pctrl);
871 ret = gpiochip_add_data(&gpio_dev->gc, gpio_dev);
875 ret = gpiochip_add_pin_range(&gpio_dev->gc, dev_name(&pdev->dev),
876 0, 0, gpio_dev->gc.ngpio);
878 dev_err(&pdev->dev, "Failed to add pin range\n");
882 ret = gpiochip_irqchip_add(&gpio_dev->gc,
888 dev_err(&pdev->dev, "could not add irqchip\n");
893 ret = devm_request_irq(&pdev->dev, irq_base, amd_gpio_irq_handler, 0,
894 KBUILD_MODNAME, gpio_dev);
898 platform_set_drvdata(pdev, gpio_dev);
900 dev_dbg(&pdev->dev, "amd gpio driver loaded\n");
904 gpiochip_remove(&gpio_dev->gc);
909 static int amd_gpio_remove(struct platform_device *pdev)
911 struct amd_gpio *gpio_dev;
913 gpio_dev = platform_get_drvdata(pdev);
915 gpiochip_remove(&gpio_dev->gc);
920 static const struct acpi_device_id amd_gpio_acpi_match[] = {
926 MODULE_DEVICE_TABLE(acpi, amd_gpio_acpi_match);
928 static struct platform_driver amd_gpio_driver = {
931 .acpi_match_table = ACPI_PTR(amd_gpio_acpi_match),
932 #ifdef CONFIG_PM_SLEEP
933 .pm = &amd_gpio_pm_ops,
936 .probe = amd_gpio_probe,
937 .remove = amd_gpio_remove,
940 module_platform_driver(amd_gpio_driver);
942 MODULE_LICENSE("GPL v2");
943 MODULE_AUTHOR("Ken Xue <Ken.Xue@amd.com>, Jeff Wu <Jeff.Wu@amd.com>");
944 MODULE_DESCRIPTION("AMD GPIO pinctrl driver");