2 * Pinctrl Driver for ADI GPIO2 controller
4 * Copyright 2007-2013 Analog Devices Inc.
6 * Licensed under the GPLv2 or later
9 #include <linux/bitops.h>
10 #include <linux/delay.h>
11 #include <linux/module.h>
12 #include <linux/err.h>
13 #include <linux/debugfs.h>
14 #include <linux/seq_file.h>
15 #include <linux/irq.h>
16 #include <linux/platform_data/pinctrl-adi2.h>
17 #include <linux/irqdomain.h>
18 #include <linux/irqchip/chained_irq.h>
19 #include <linux/pinctrl/pinctrl.h>
20 #include <linux/pinctrl/pinmux.h>
21 #include <linux/pinctrl/consumer.h>
22 #include <linux/pinctrl/machine.h>
23 #include <linux/syscore_ops.h>
24 #include <linux/gpio.h>
25 #include <asm/portmux.h>
26 #include "pinctrl-adi2.h"
30 According to the BF54x HRM, pint means "pin interrupt".
31 http://www.analog.com/static/imported-files/processor_manuals/ADSP-BF54x_hwr_rev1.2.pdf
33 ADSP-BF54x processor Blackfin processors have four SIC interrupt chan-
34 nels dedicated to pin interrupt purposes. These channels are managed by
35 four hardware blocks, called PINT0, PINT1, PINT2, and PINT3. Every PINTx
36 block can sense to up to 32 pins. While PINT0 and PINT1 can sense the
37 pins of port A and port B, PINT2 and PINT3 manage all the pins from port
38 C to port J as shown in Figure 9-2.
41 The ten GPIO ports are subdivided into 8-bit half ports, resulting in lower and
42 upper half 8-bit units. The PINTx_ASSIGN registers control the 8-bit multi-
43 plexers shown in Figure 9-3. Lower half units of eight pins can be
44 forwarded to either byte 0 or byte 2 of either associated PINTx block.
45 Upper half units can be forwarded to either byte 1 or byte 3 of the pin
46 interrupt blocks, without further restrictions.
48 All MMR registers in the pin interrupt module are 32 bits wide. To simply the
49 mapping logic, this driver only maps a 16-bit gpio port to the upper or lower
50 16 bits of a PINTx block. You can find the Figure 9-3 on page 583.
52 Each IRQ domain is binding to a GPIO bank device. 2 GPIO bank devices can map
53 to one PINT device. Two in "struct gpio_pint" are used to ease the PINT
56 The GPIO bank mapping to the lower 16 bits of the PINT device set its IRQ
57 domain pointer in domain[0]. The IRQ domain pointer of the other bank is set
58 to domain[1]. PINT interrupt handler adi_gpio_handle_pint_irq() finds out
59 the current domain pointer according to whether the interrupt request mask
60 is in lower 16 bits (domain[0]) or upper 16bits (domain[1]).
62 A PINT device is not part of a GPIO port device in Blackfin. Multiple GPIO
63 port devices can be mapped to the same PINT device.
67 static LIST_HEAD(adi_pint_list);
68 static LIST_HEAD(adi_gpio_port_list);
70 #define DRIVER_NAME "pinctrl-adi2"
72 #define PINT_HI_OFFSET 16
75 * struct gpio_port_saved - GPIO port registers that should be saved between
76 * power suspend and resume operations.
78 * @fer: PORTx_FER register
79 * @data: PORTx_DATA register
80 * @dir: PORTx_DIR register
81 * @inen: PORTx_INEN register
82 * @mux: PORTx_MUX register
84 struct gpio_port_saved {
93 * struct gpio_pint_saved - PINT registers saved in PM operations
95 * @assign: ASSIGN register
96 * @edge_set: EDGE_SET register
97 * @invert_set: INVERT_SET register
99 struct gpio_pint_saved {
106 * struct gpio_pint - Pin interrupt controller device. Multiple ADI GPIO
107 * banks can be mapped into one Pin interrupt controller.
109 * @node: All gpio_pint instances are added to a global list.
110 * @base: PINT device register base address
111 * @irq: IRQ of the PINT device, it is the parent IRQ of all
112 * GPIO IRQs mapping to this device.
113 * @domain: [0] irq domain of the gpio port, whose hardware interrupts are
114 * mapping to the low 16-bit of the pint registers.
115 * [1] irq domain of the gpio port, whose hardware interrupts are
116 * mapping to the high 16-bit of the pint registers.
117 * @regs: address pointer to the PINT device
118 * @map_count: No more than 2 GPIO banks can be mapped to this PINT device.
119 * @lock: This lock make sure the irq_chip operations to one PINT device
120 * for different GPIO interrrupts are atomic.
121 * @pint_map_port: Set up the mapping between one PINT device and
122 * multiple GPIO banks.
125 struct list_head node;
128 struct irq_domain *domain[2];
129 struct gpio_pint_regs *regs;
130 struct gpio_pint_saved saved_data;
134 int (*pint_map_port)(struct gpio_pint *pint, bool assign,
135 u8 map, struct irq_domain *domain);
141 * @dev: a pointer back to containing device
142 * @pctl: the pinctrl device
143 * @soc: SoC data for this specific chip
147 struct pinctrl_dev *pctl;
148 const struct adi_pinctrl_soc_data *soc;
152 * struct gpio_port - GPIO bank device. Multiple ADI GPIO banks can be mapped
153 * into one pin interrupt controller.
155 * @node: All gpio_port instances are added to a list.
156 * @base: GPIO bank device register base address
157 * @irq_base: base IRQ of the GPIO bank device
158 * @width: PIN number of the GPIO bank device
159 * @regs: address pointer to the GPIO bank device
160 * @saved_data: registers that should be saved between PM operations.
161 * @dev: device structure of this GPIO bank
162 * @pint: GPIO PINT device that this GPIO bank mapped to
163 * @pint_map: GIOP bank mapping code in PINT device
164 * @pint_assign: The 32-bit PINT registers can be divided into 2 parts. A
165 * GPIO bank can be mapped into either low 16 bits[0] or high 16
166 * bits[1] of each PINT register.
167 * @lock: This lock make sure the irq_chip operations to one PINT device
168 * for different GPIO interrrupts are atomic.
169 * @chip: abstract a GPIO controller
170 * @domain: The irq domain owned by the GPIO port.
171 * @rsvmap: Reservation map array for each pin in the GPIO bank
174 struct list_head node;
178 struct gpio_port_t *regs;
179 struct gpio_port_saved saved_data;
182 struct gpio_pint *pint;
187 struct gpio_chip chip;
188 struct irq_domain *domain;
191 static inline u8 pin_to_offset(struct pinctrl_gpio_range *range, unsigned pin)
193 return pin - range->pin_base;
196 static inline u32 hwirq_to_pintbit(struct gpio_port *port, int hwirq)
198 return port->pint_assign ? BIT(hwirq) << PINT_HI_OFFSET : BIT(hwirq);
201 static struct gpio_pint *find_gpio_pint(unsigned id)
203 struct gpio_pint *pint;
206 list_for_each_entry(pint, &adi_pint_list, node) {
215 static inline void port_setup(struct gpio_port *port, unsigned offset,
218 struct gpio_port_t *regs = port->regs;
221 writew(readw(®s->port_fer) & ~BIT(offset),
224 writew(readw(®s->port_fer) | BIT(offset), ®s->port_fer);
227 static inline void portmux_setup(struct gpio_port *port, unsigned offset,
228 unsigned short function)
230 struct gpio_port_t *regs = port->regs;
233 pmux = readl(®s->port_mux);
235 /* The function field of each pin has 2 consecutive bits in
238 pmux &= ~(0x3 << (2 * offset));
239 pmux |= (function & 0x3) << (2 * offset);
241 writel(pmux, ®s->port_mux);
244 static inline u16 get_portmux(struct gpio_port *port, unsigned offset)
246 struct gpio_port_t *regs = port->regs;
247 u32 pmux = readl(®s->port_mux);
249 /* The function field of each pin has 2 consecutive bits in
252 return pmux >> (2 * offset) & 0x3;
255 static void adi_gpio_ack_irq(struct irq_data *d)
258 struct gpio_port *port = irq_data_get_irq_chip_data(d);
259 struct gpio_pint_regs *regs = port->pint->regs;
260 unsigned pintbit = hwirq_to_pintbit(port, d->hwirq);
262 spin_lock_irqsave(&port->lock, flags);
263 spin_lock(&port->pint->lock);
265 if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) {
266 if (readl(®s->invert_set) & pintbit)
267 writel(pintbit, ®s->invert_clear);
269 writel(pintbit, ®s->invert_set);
272 writel(pintbit, ®s->request);
274 spin_unlock(&port->pint->lock);
275 spin_unlock_irqrestore(&port->lock, flags);
278 static void adi_gpio_mask_ack_irq(struct irq_data *d)
281 struct gpio_port *port = irq_data_get_irq_chip_data(d);
282 struct gpio_pint_regs *regs = port->pint->regs;
283 unsigned pintbit = hwirq_to_pintbit(port, d->hwirq);
285 spin_lock_irqsave(&port->lock, flags);
286 spin_lock(&port->pint->lock);
288 if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) {
289 if (readl(®s->invert_set) & pintbit)
290 writel(pintbit, ®s->invert_clear);
292 writel(pintbit, ®s->invert_set);
295 writel(pintbit, ®s->request);
296 writel(pintbit, ®s->mask_clear);
298 spin_unlock(&port->pint->lock);
299 spin_unlock_irqrestore(&port->lock, flags);
302 static void adi_gpio_mask_irq(struct irq_data *d)
305 struct gpio_port *port = irq_data_get_irq_chip_data(d);
306 struct gpio_pint_regs *regs = port->pint->regs;
308 spin_lock_irqsave(&port->lock, flags);
309 spin_lock(&port->pint->lock);
311 writel(hwirq_to_pintbit(port, d->hwirq), ®s->mask_clear);
313 spin_unlock(&port->pint->lock);
314 spin_unlock_irqrestore(&port->lock, flags);
317 static void adi_gpio_unmask_irq(struct irq_data *d)
320 struct gpio_port *port = irq_data_get_irq_chip_data(d);
321 struct gpio_pint_regs *regs = port->pint->regs;
323 spin_lock_irqsave(&port->lock, flags);
324 spin_lock(&port->pint->lock);
326 writel(hwirq_to_pintbit(port, d->hwirq), ®s->mask_set);
328 spin_unlock(&port->pint->lock);
329 spin_unlock_irqrestore(&port->lock, flags);
332 static unsigned int adi_gpio_irq_startup(struct irq_data *d)
335 struct gpio_port *port = irq_data_get_irq_chip_data(d);
336 struct gpio_pint_regs *regs;
339 pr_err("GPIO IRQ %d :Not exist\n", d->irq);
340 /* FIXME: negative return code will be ignored */
344 regs = port->pint->regs;
346 spin_lock_irqsave(&port->lock, flags);
347 spin_lock(&port->pint->lock);
349 port_setup(port, d->hwirq, true);
350 writew(BIT(d->hwirq), &port->regs->dir_clear);
351 writew(readw(&port->regs->inen) | BIT(d->hwirq), &port->regs->inen);
353 writel(hwirq_to_pintbit(port, d->hwirq), ®s->mask_set);
355 spin_unlock(&port->pint->lock);
356 spin_unlock_irqrestore(&port->lock, flags);
361 static void adi_gpio_irq_shutdown(struct irq_data *d)
364 struct gpio_port *port = irq_data_get_irq_chip_data(d);
365 struct gpio_pint_regs *regs = port->pint->regs;
367 spin_lock_irqsave(&port->lock, flags);
368 spin_lock(&port->pint->lock);
370 writel(hwirq_to_pintbit(port, d->hwirq), ®s->mask_clear);
372 spin_unlock(&port->pint->lock);
373 spin_unlock_irqrestore(&port->lock, flags);
376 static int adi_gpio_irq_type(struct irq_data *d, unsigned int type)
379 struct gpio_port *port = irq_data_get_irq_chip_data(d);
380 struct gpio_pint_regs *pint_regs;
382 unsigned int irq = d->irq;
387 pr_err("GPIO IRQ %d :Not exist\n", d->irq);
391 pint_regs = port->pint->regs;
393 pintmask = hwirq_to_pintbit(port, d->hwirq);
395 spin_lock_irqsave(&port->lock, flags);
396 spin_lock(&port->pint->lock);
398 /* In case of interrupt autodetect, set irq type to edge sensitive. */
399 if (type == IRQ_TYPE_PROBE)
400 type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
402 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
403 IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
404 snprintf(buf, 16, "gpio-irq%u", irq);
405 port_setup(port, d->hwirq, true);
409 /* The GPIO interrupt is triggered only when its input value
410 * transfer from 0 to 1. So, invert the input value if the
411 * irq type is low or falling
413 if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW)))
414 writel(pintmask, &pint_regs->invert_set);
416 writel(pintmask, &pint_regs->invert_clear);
418 /* In edge sensitive case, if the input value of the requested irq
419 * is already 1, invert it.
421 if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) {
422 if (gpio_get_value(port->chip.base + d->hwirq))
423 writel(pintmask, &pint_regs->invert_set);
425 writel(pintmask, &pint_regs->invert_clear);
428 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
429 writel(pintmask, &pint_regs->edge_set);
430 irq_set_handler_locked(d, handle_edge_irq);
432 writel(pintmask, &pint_regs->edge_clear);
433 irq_set_handler_locked(d, handle_level_irq);
437 spin_unlock(&port->pint->lock);
438 spin_unlock_irqrestore(&port->lock, flags);
444 static int adi_gpio_set_wake(struct irq_data *d, unsigned int state)
446 struct gpio_port *port = irq_data_get_irq_chip_data(d);
448 if (!port || !port->pint || port->pint->irq != d->irq)
452 adi_internal_set_wake(port->pint->irq, state);
458 static int adi_pint_suspend(void)
460 struct gpio_pint *pint;
462 list_for_each_entry(pint, &adi_pint_list, node) {
463 writel(0xffffffff, &pint->regs->mask_clear);
464 pint->saved_data.assign = readl(&pint->regs->assign);
465 pint->saved_data.edge_set = readl(&pint->regs->edge_set);
466 pint->saved_data.invert_set = readl(&pint->regs->invert_set);
472 static void adi_pint_resume(void)
474 struct gpio_pint *pint;
476 list_for_each_entry(pint, &adi_pint_list, node) {
477 writel(pint->saved_data.assign, &pint->regs->assign);
478 writel(pint->saved_data.edge_set, &pint->regs->edge_set);
479 writel(pint->saved_data.invert_set, &pint->regs->invert_set);
483 static int adi_gpio_suspend(void)
485 struct gpio_port *port;
487 list_for_each_entry(port, &adi_gpio_port_list, node) {
488 port->saved_data.fer = readw(&port->regs->port_fer);
489 port->saved_data.mux = readl(&port->regs->port_mux);
490 port->saved_data.data = readw(&port->regs->data);
491 port->saved_data.inen = readw(&port->regs->inen);
492 port->saved_data.dir = readw(&port->regs->dir_set);
495 return adi_pint_suspend();
498 static void adi_gpio_resume(void)
500 struct gpio_port *port;
504 list_for_each_entry(port, &adi_gpio_port_list, node) {
505 writel(port->saved_data.mux, &port->regs->port_mux);
506 writew(port->saved_data.fer, &port->regs->port_fer);
507 writew(port->saved_data.inen, &port->regs->inen);
508 writew(port->saved_data.data & port->saved_data.dir,
509 &port->regs->data_set);
510 writew(port->saved_data.dir, &port->regs->dir_set);
515 static struct syscore_ops gpio_pm_syscore_ops = {
516 .suspend = adi_gpio_suspend,
517 .resume = adi_gpio_resume,
519 #else /* CONFIG_PM */
520 #define adi_gpio_set_wake NULL
521 #endif /* CONFIG_PM */
523 #ifdef CONFIG_IRQ_PREFLOW_FASTEOI
524 static inline void preflow_handler(struct irq_desc *desc)
526 if (desc->preflow_handler)
527 desc->preflow_handler(&desc->irq_data);
530 static inline void preflow_handler(struct irq_desc *desc) { }
533 static void adi_gpio_handle_pint_irq(struct irq_desc *desc)
536 u32 level_mask, hwirq;
538 struct gpio_pint *pint = irq_desc_get_handler_data(desc);
539 struct irq_chip *chip = irq_desc_get_chip(desc);
540 struct gpio_pint_regs *regs = pint->regs;
541 struct irq_domain *domain;
543 preflow_handler(desc);
544 chained_irq_enter(chip, desc);
546 request = readl(®s->request);
547 level_mask = readl(®s->edge_set) & request;
550 domain = pint->domain[0];
552 /* domain pointer need to be changed only once at IRQ 16 when
553 * we go through IRQ requests from bit 0 to bit 31.
555 if (hwirq == PINT_HI_OFFSET)
556 domain = pint->domain[1];
559 if (level_mask & BIT(hwirq)) {
561 chained_irq_exit(chip, desc);
563 generic_handle_irq(irq_find_mapping(domain,
564 hwirq % PINT_HI_OFFSET));
572 chained_irq_exit(chip, desc);
575 static struct irq_chip adi_gpio_irqchip = {
577 .irq_ack = adi_gpio_ack_irq,
578 .irq_mask = adi_gpio_mask_irq,
579 .irq_mask_ack = adi_gpio_mask_ack_irq,
580 .irq_unmask = adi_gpio_unmask_irq,
581 .irq_disable = adi_gpio_mask_irq,
582 .irq_enable = adi_gpio_unmask_irq,
583 .irq_set_type = adi_gpio_irq_type,
584 .irq_startup = adi_gpio_irq_startup,
585 .irq_shutdown = adi_gpio_irq_shutdown,
586 .irq_set_wake = adi_gpio_set_wake,
589 static int adi_get_groups_count(struct pinctrl_dev *pctldev)
591 struct adi_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);
593 return pinctrl->soc->ngroups;
596 static const char *adi_get_group_name(struct pinctrl_dev *pctldev,
599 struct adi_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);
601 return pinctrl->soc->groups[selector].name;
604 static int adi_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
605 const unsigned **pins,
608 struct adi_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);
610 *pins = pinctrl->soc->groups[selector].pins;
611 *num_pins = pinctrl->soc->groups[selector].num;
615 static struct pinctrl_ops adi_pctrl_ops = {
616 .get_groups_count = adi_get_groups_count,
617 .get_group_name = adi_get_group_name,
618 .get_group_pins = adi_get_group_pins,
621 static int adi_pinmux_set(struct pinctrl_dev *pctldev, unsigned func_id,
624 struct adi_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);
625 struct gpio_port *port;
626 struct pinctrl_gpio_range *range;
628 unsigned short *mux, pin;
630 mux = (unsigned short *)pinctrl->soc->groups[group_id].mux;
635 range = pinctrl_find_gpio_range_from_pin(pctldev, pin);
636 if (range == NULL) /* should not happen */
639 port = gpiochip_get_data(range->gc);
641 spin_lock_irqsave(&port->lock, flags);
643 portmux_setup(port, pin_to_offset(range, pin),
645 port_setup(port, pin_to_offset(range, pin), false);
648 spin_unlock_irqrestore(&port->lock, flags);
654 static int adi_pinmux_get_funcs_count(struct pinctrl_dev *pctldev)
656 struct adi_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);
658 return pinctrl->soc->nfunctions;
661 static const char *adi_pinmux_get_func_name(struct pinctrl_dev *pctldev,
664 struct adi_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);
666 return pinctrl->soc->functions[selector].name;
669 static int adi_pinmux_get_groups(struct pinctrl_dev *pctldev, unsigned selector,
670 const char * const **groups,
671 unsigned * const num_groups)
673 struct adi_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);
675 *groups = pinctrl->soc->functions[selector].groups;
676 *num_groups = pinctrl->soc->functions[selector].num_groups;
680 static int adi_pinmux_request_gpio(struct pinctrl_dev *pctldev,
681 struct pinctrl_gpio_range *range, unsigned pin)
683 struct gpio_port *port;
687 port = gpiochip_get_data(range->gc);
688 offset = pin_to_offset(range, pin);
690 spin_lock_irqsave(&port->lock, flags);
692 port_setup(port, offset, true);
694 spin_unlock_irqrestore(&port->lock, flags);
699 static struct pinmux_ops adi_pinmux_ops = {
700 .set_mux = adi_pinmux_set,
701 .get_functions_count = adi_pinmux_get_funcs_count,
702 .get_function_name = adi_pinmux_get_func_name,
703 .get_function_groups = adi_pinmux_get_groups,
704 .gpio_request_enable = adi_pinmux_request_gpio,
709 static struct pinctrl_desc adi_pinmux_desc = {
711 .pctlops = &adi_pctrl_ops,
712 .pmxops = &adi_pinmux_ops,
713 .owner = THIS_MODULE,
716 static int adi_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
718 struct gpio_port *port;
721 port = gpiochip_get_data(chip);
723 spin_lock_irqsave(&port->lock, flags);
725 writew(BIT(offset), &port->regs->dir_clear);
726 writew(readw(&port->regs->inen) | BIT(offset), &port->regs->inen);
728 spin_unlock_irqrestore(&port->lock, flags);
733 static void adi_gpio_set_value(struct gpio_chip *chip, unsigned offset,
736 struct gpio_port *port = gpiochip_get_data(chip);
737 struct gpio_port_t *regs = port->regs;
740 spin_lock_irqsave(&port->lock, flags);
743 writew(BIT(offset), ®s->data_set);
745 writew(BIT(offset), ®s->data_clear);
747 spin_unlock_irqrestore(&port->lock, flags);
750 static int adi_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
753 struct gpio_port *port = gpiochip_get_data(chip);
754 struct gpio_port_t *regs = port->regs;
757 spin_lock_irqsave(&port->lock, flags);
759 writew(readw(®s->inen) & ~BIT(offset), ®s->inen);
761 writew(BIT(offset), ®s->data_set);
763 writew(BIT(offset), ®s->data_clear);
764 writew(BIT(offset), ®s->dir_set);
766 spin_unlock_irqrestore(&port->lock, flags);
771 static int adi_gpio_get_value(struct gpio_chip *chip, unsigned offset)
773 struct gpio_port *port = gpiochip_get_data(chip);
774 struct gpio_port_t *regs = port->regs;
778 spin_lock_irqsave(&port->lock, flags);
780 ret = !!(readw(®s->data) & BIT(offset));
782 spin_unlock_irqrestore(&port->lock, flags);
787 static int adi_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
789 struct gpio_port *port = gpiochip_get_data(chip);
791 if (port->irq_base >= 0)
792 return irq_find_mapping(port->domain, offset);
794 return irq_create_mapping(port->domain, offset);
797 static int adi_pint_map_port(struct gpio_pint *pint, bool assign, u8 map,
798 struct irq_domain *domain)
800 struct gpio_pint_regs *regs = pint->regs;
803 if (pint->map_count > 1)
808 /* The map_mask of each gpio port is a 16-bit duplicate
809 * of the 8-bit map. It can be set to either high 16 bits or low
810 * 16 bits of the pint assignment register.
812 map_mask = (map << 8) | map;
814 map_mask <<= PINT_HI_OFFSET;
815 writel((readl(®s->assign) & 0xFFFF) | map_mask,
818 writel((readl(®s->assign) & 0xFFFF0000) | map_mask,
821 pint->domain[assign] = domain;
826 static int adi_gpio_pint_probe(struct platform_device *pdev)
828 struct device *dev = &pdev->dev;
829 struct resource *res;
830 struct gpio_pint *pint;
832 pint = devm_kzalloc(dev, sizeof(struct gpio_pint), GFP_KERNEL);
834 dev_err(dev, "Memory alloc failed\n");
838 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
839 pint->base = devm_ioremap_resource(dev, res);
840 if (IS_ERR(pint->base))
841 return PTR_ERR(pint->base);
843 pint->regs = (struct gpio_pint_regs *)pint->base;
845 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
847 dev_err(dev, "Invalid IRQ resource\n");
851 spin_lock_init(&pint->lock);
853 pint->irq = res->start;
854 pint->pint_map_port = adi_pint_map_port;
855 platform_set_drvdata(pdev, pint);
857 irq_set_chained_handler_and_data(pint->irq, adi_gpio_handle_pint_irq,
860 list_add_tail(&pint->node, &adi_pint_list);
865 static int adi_gpio_pint_remove(struct platform_device *pdev)
867 struct gpio_pint *pint = platform_get_drvdata(pdev);
869 list_del(&pint->node);
870 irq_set_handler(pint->irq, handle_simple_irq);
875 static int adi_gpio_irq_map(struct irq_domain *d, unsigned int irq,
876 irq_hw_number_t hwirq)
878 struct gpio_port *port = d->host_data;
883 irq_set_chip_data(irq, port);
884 irq_set_chip_and_handler(irq, &adi_gpio_irqchip,
890 static const struct irq_domain_ops adi_gpio_irq_domain_ops = {
891 .map = adi_gpio_irq_map,
892 .xlate = irq_domain_xlate_onecell,
895 static int adi_gpio_init_int(struct gpio_port *port)
897 struct device_node *node = port->dev->of_node;
898 struct gpio_pint *pint = port->pint;
901 port->domain = irq_domain_add_linear(node, port->width,
902 &adi_gpio_irq_domain_ops, port);
904 dev_err(port->dev, "Failed to create irqdomain\n");
908 /* According to BF54x and BF60x HRM, pin interrupt devices are not
909 * part of the GPIO port device. in GPIO interrupt mode, the GPIO
910 * pins of multiple port devices can be routed into one pin interrupt
911 * device. The mapping can be configured by setting pint assignment
912 * register with the mapping value of different GPIO port. This is
913 * done via function pint_map_port().
915 ret = pint->pint_map_port(port->pint, port->pint_assign,
916 port->pint_map, port->domain);
920 if (port->irq_base >= 0) {
921 ret = irq_create_strict_mappings(port->domain, port->irq_base,
924 dev_err(port->dev, "Couldn't associate to domain\n");
932 #define DEVNAME_SIZE 16
934 static int adi_gpio_probe(struct platform_device *pdev)
936 struct device *dev = &pdev->dev;
937 const struct adi_pinctrl_gpio_platform_data *pdata;
938 struct resource *res;
939 struct gpio_port *port;
940 char pinctrl_devname[DEVNAME_SIZE];
944 pdata = dev->platform_data;
948 port = devm_kzalloc(dev, sizeof(struct gpio_port), GFP_KERNEL);
950 dev_err(dev, "Memory alloc failed\n");
954 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
955 port->base = devm_ioremap_resource(dev, res);
956 if (IS_ERR(port->base))
957 return PTR_ERR(port->base);
959 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
963 port->irq_base = res->start;
965 port->width = pdata->port_width;
967 port->regs = (struct gpio_port_t *)port->base;
968 port->pint_assign = pdata->pint_assign;
969 port->pint_map = pdata->pint_map;
971 port->pint = find_gpio_pint(pdata->pint_id);
973 ret = adi_gpio_init_int(port);
978 spin_lock_init(&port->lock);
980 platform_set_drvdata(pdev, port);
982 port->chip.label = "adi-gpio";
983 port->chip.direction_input = adi_gpio_direction_input;
984 port->chip.get = adi_gpio_get_value;
985 port->chip.direction_output = adi_gpio_direction_output;
986 port->chip.set = adi_gpio_set_value;
987 port->chip.request = gpiochip_generic_request,
988 port->chip.free = gpiochip_generic_free,
989 port->chip.to_irq = adi_gpio_to_irq;
990 if (pdata->port_gpio_base > 0)
991 port->chip.base = pdata->port_gpio_base;
993 port->chip.base = gpio;
994 port->chip.ngpio = port->width;
995 gpio = port->chip.base + port->width;
997 ret = gpiochip_add_data(&port->chip, port);
999 dev_err(&pdev->dev, "Fail to add GPIO chip.\n");
1000 goto out_remove_domain;
1003 /* Add gpio pin range */
1004 snprintf(pinctrl_devname, DEVNAME_SIZE, "pinctrl-adi2.%d",
1006 pinctrl_devname[DEVNAME_SIZE - 1] = 0;
1007 ret = gpiochip_add_pin_range(&port->chip, pinctrl_devname,
1008 0, pdata->port_pin_base, port->width);
1010 dev_err(&pdev->dev, "Fail to add pin range to %s.\n",
1012 goto out_remove_gpiochip;
1015 list_add_tail(&port->node, &adi_gpio_port_list);
1019 out_remove_gpiochip:
1020 gpiochip_remove(&port->chip);
1023 irq_domain_remove(port->domain);
1028 static int adi_gpio_remove(struct platform_device *pdev)
1030 struct gpio_port *port = platform_get_drvdata(pdev);
1033 list_del(&port->node);
1034 gpiochip_remove(&port->chip);
1036 for (offset = 0; offset < port->width; offset++)
1037 irq_dispose_mapping(irq_find_mapping(port->domain,
1039 irq_domain_remove(port->domain);
1045 static int adi_pinctrl_probe(struct platform_device *pdev)
1047 struct adi_pinctrl *pinctrl;
1049 pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL);
1053 pinctrl->dev = &pdev->dev;
1055 adi_pinctrl_soc_init(&pinctrl->soc);
1057 adi_pinmux_desc.pins = pinctrl->soc->pins;
1058 adi_pinmux_desc.npins = pinctrl->soc->npins;
1060 /* Now register the pin controller and all pins it handles */
1061 pinctrl->pctl = pinctrl_register(&adi_pinmux_desc, &pdev->dev, pinctrl);
1062 if (IS_ERR(pinctrl->pctl)) {
1063 dev_err(&pdev->dev, "could not register pinctrl ADI2 driver\n");
1064 return PTR_ERR(pinctrl->pctl);
1067 platform_set_drvdata(pdev, pinctrl);
1072 static int adi_pinctrl_remove(struct platform_device *pdev)
1074 struct adi_pinctrl *pinctrl = platform_get_drvdata(pdev);
1076 pinctrl_unregister(pinctrl->pctl);
1081 static struct platform_driver adi_pinctrl_driver = {
1082 .probe = adi_pinctrl_probe,
1083 .remove = adi_pinctrl_remove,
1085 .name = DRIVER_NAME,
1089 static struct platform_driver adi_gpio_pint_driver = {
1090 .probe = adi_gpio_pint_probe,
1091 .remove = adi_gpio_pint_remove,
1093 .name = "adi-gpio-pint",
1097 static struct platform_driver adi_gpio_driver = {
1098 .probe = adi_gpio_probe,
1099 .remove = adi_gpio_remove,
1105 static struct platform_driver * const drivers[] = {
1106 &adi_pinctrl_driver,
1107 &adi_gpio_pint_driver,
1111 static int __init adi_pinctrl_setup(void)
1115 ret = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1120 register_syscore_ops(&gpio_pm_syscore_ops);
1124 arch_initcall(adi_pinctrl_setup);
1126 MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
1127 MODULE_DESCRIPTION("ADI gpio2 pin control driver");
1128 MODULE_LICENSE("GPL");