2 * GPIO driver for Marvell SoCs
4 * Copyright (C) 2012 Marvell
6 * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
7 * Andrew Lunn <andrew@lunn.ch>
8 * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
10 * This file is licensed under the terms of the GNU General Public
11 * License version 2. This program is licensed "as is" without any
12 * warranty of any kind, whether express or implied.
14 * This driver is a fairly straightforward GPIO driver for the
15 * complete family of Marvell EBU SoC platforms (Orion, Dove,
16 * Kirkwood, Discovery, Armada 370/XP). The only complexity of this
17 * driver is the different register layout that exists between the
18 * non-SMP platforms (Orion, Dove, Kirkwood, Armada 370) and the SMP
19 * platforms (MV78200 from the Discovery family and the Armada
20 * XP). Therefore, this driver handles three variants of the GPIO
22 * - the basic variant, called "orion-gpio", with the simplest
23 * register set. Used on Orion, Dove, Kirkwoord, Armada 370 and
24 * non-SMP Discovery systems
25 * - the mv78200 variant for MV78200 Discovery systems. This variant
26 * turns the edge mask and level mask registers into CPU0 edge
27 * mask/level mask registers, and adds CPU1 edge mask/level mask
29 * - the armadaxp variant for Armada XP systems. This variant keeps
30 * the normal cause/edge mask/level mask registers when the global
31 * interrupts are used, but adds per-CPU cause/edge mask/level mask
32 * registers n a separate memory area for the per-CPU GPIO
36 #include <linux/err.h>
37 #include <linux/init.h>
38 #include <linux/gpio.h>
39 #include <linux/irq.h>
40 #include <linux/slab.h>
41 #include <linux/irqdomain.h>
43 #include <linux/of_irq.h>
44 #include <linux/of_device.h>
45 #include <linux/clk.h>
46 #include <linux/pinctrl/consumer.h>
47 #include <linux/irqchip/chained_irq.h>
50 * GPIO unit register offsets.
52 #define GPIO_OUT_OFF 0x0000
53 #define GPIO_IO_CONF_OFF 0x0004
54 #define GPIO_BLINK_EN_OFF 0x0008
55 #define GPIO_IN_POL_OFF 0x000c
56 #define GPIO_DATA_IN_OFF 0x0010
57 #define GPIO_EDGE_CAUSE_OFF 0x0014
58 #define GPIO_EDGE_MASK_OFF 0x0018
59 #define GPIO_LEVEL_MASK_OFF 0x001c
61 /* The MV78200 has per-CPU registers for edge mask and level mask */
62 #define GPIO_EDGE_MASK_MV78200_OFF(cpu) ((cpu) ? 0x30 : 0x18)
63 #define GPIO_LEVEL_MASK_MV78200_OFF(cpu) ((cpu) ? 0x34 : 0x1C)
66 * The Armada XP has per-CPU registers for interrupt cause, interrupt
67 * mask and interrupt level mask. Those are relative to the
70 #define GPIO_EDGE_CAUSE_ARMADAXP_OFF(cpu) ((cpu) * 0x4)
71 #define GPIO_EDGE_MASK_ARMADAXP_OFF(cpu) (0x10 + (cpu) * 0x4)
72 #define GPIO_LEVEL_MASK_ARMADAXP_OFF(cpu) (0x20 + (cpu) * 0x4)
74 #define MVEBU_GPIO_SOC_VARIANT_ORION 0x1
75 #define MVEBU_GPIO_SOC_VARIANT_MV78200 0x2
76 #define MVEBU_GPIO_SOC_VARIANT_ARMADAXP 0x3
78 #define MVEBU_MAX_GPIO_PER_BANK 32
80 struct mvebu_gpio_chip {
81 struct gpio_chip chip;
83 void __iomem *membase;
84 void __iomem *percpu_membase;
86 struct irq_domain *domain;
89 /* Used to preserve GPIO registers across suspend/resume */
94 u32 edge_mask_regs[4];
95 u32 level_mask_regs[4];
99 * Functions returning addresses of individual registers for a given
102 static inline void __iomem *mvebu_gpioreg_out(struct mvebu_gpio_chip *mvchip)
104 return mvchip->membase + GPIO_OUT_OFF;
107 static inline void __iomem *mvebu_gpioreg_blink(struct mvebu_gpio_chip *mvchip)
109 return mvchip->membase + GPIO_BLINK_EN_OFF;
112 static inline void __iomem *
113 mvebu_gpioreg_io_conf(struct mvebu_gpio_chip *mvchip)
115 return mvchip->membase + GPIO_IO_CONF_OFF;
118 static inline void __iomem *mvebu_gpioreg_in_pol(struct mvebu_gpio_chip *mvchip)
120 return mvchip->membase + GPIO_IN_POL_OFF;
123 static inline void __iomem *
124 mvebu_gpioreg_data_in(struct mvebu_gpio_chip *mvchip)
126 return mvchip->membase + GPIO_DATA_IN_OFF;
129 static inline void __iomem *
130 mvebu_gpioreg_edge_cause(struct mvebu_gpio_chip *mvchip)
134 switch (mvchip->soc_variant) {
135 case MVEBU_GPIO_SOC_VARIANT_ORION:
136 case MVEBU_GPIO_SOC_VARIANT_MV78200:
137 return mvchip->membase + GPIO_EDGE_CAUSE_OFF;
138 case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
139 cpu = smp_processor_id();
140 return mvchip->percpu_membase +
141 GPIO_EDGE_CAUSE_ARMADAXP_OFF(cpu);
147 static inline void __iomem *
148 mvebu_gpioreg_edge_mask(struct mvebu_gpio_chip *mvchip)
152 switch (mvchip->soc_variant) {
153 case MVEBU_GPIO_SOC_VARIANT_ORION:
154 return mvchip->membase + GPIO_EDGE_MASK_OFF;
155 case MVEBU_GPIO_SOC_VARIANT_MV78200:
156 cpu = smp_processor_id();
157 return mvchip->membase + GPIO_EDGE_MASK_MV78200_OFF(cpu);
158 case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
159 cpu = smp_processor_id();
160 return mvchip->percpu_membase +
161 GPIO_EDGE_MASK_ARMADAXP_OFF(cpu);
167 static void __iomem *mvebu_gpioreg_level_mask(struct mvebu_gpio_chip *mvchip)
171 switch (mvchip->soc_variant) {
172 case MVEBU_GPIO_SOC_VARIANT_ORION:
173 return mvchip->membase + GPIO_LEVEL_MASK_OFF;
174 case MVEBU_GPIO_SOC_VARIANT_MV78200:
175 cpu = smp_processor_id();
176 return mvchip->membase + GPIO_LEVEL_MASK_MV78200_OFF(cpu);
177 case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
178 cpu = smp_processor_id();
179 return mvchip->percpu_membase +
180 GPIO_LEVEL_MASK_ARMADAXP_OFF(cpu);
187 * Functions implementing the gpio_chip methods
190 static void mvebu_gpio_set(struct gpio_chip *chip, unsigned pin, int value)
192 struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
196 spin_lock_irqsave(&mvchip->lock, flags);
197 u = readl_relaxed(mvebu_gpioreg_out(mvchip));
202 writel_relaxed(u, mvebu_gpioreg_out(mvchip));
203 spin_unlock_irqrestore(&mvchip->lock, flags);
206 static int mvebu_gpio_get(struct gpio_chip *chip, unsigned pin)
208 struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
211 if (readl_relaxed(mvebu_gpioreg_io_conf(mvchip)) & (1 << pin)) {
212 u = readl_relaxed(mvebu_gpioreg_data_in(mvchip)) ^
213 readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
215 u = readl_relaxed(mvebu_gpioreg_out(mvchip));
218 return (u >> pin) & 1;
221 static void mvebu_gpio_blink(struct gpio_chip *chip, unsigned pin, int value)
223 struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
227 spin_lock_irqsave(&mvchip->lock, flags);
228 u = readl_relaxed(mvebu_gpioreg_blink(mvchip));
233 writel_relaxed(u, mvebu_gpioreg_blink(mvchip));
234 spin_unlock_irqrestore(&mvchip->lock, flags);
237 static int mvebu_gpio_direction_input(struct gpio_chip *chip, unsigned pin)
239 struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
245 * Check with the pinctrl driver whether this pin is usable as
248 ret = pinctrl_gpio_direction_input(chip->base + pin);
252 spin_lock_irqsave(&mvchip->lock, flags);
253 u = readl_relaxed(mvebu_gpioreg_io_conf(mvchip));
255 writel_relaxed(u, mvebu_gpioreg_io_conf(mvchip));
256 spin_unlock_irqrestore(&mvchip->lock, flags);
261 static int mvebu_gpio_direction_output(struct gpio_chip *chip, unsigned pin,
264 struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
270 * Check with the pinctrl driver whether this pin is usable as
273 ret = pinctrl_gpio_direction_output(chip->base + pin);
277 mvebu_gpio_blink(chip, pin, 0);
278 mvebu_gpio_set(chip, pin, value);
280 spin_lock_irqsave(&mvchip->lock, flags);
281 u = readl_relaxed(mvebu_gpioreg_io_conf(mvchip));
283 writel_relaxed(u, mvebu_gpioreg_io_conf(mvchip));
284 spin_unlock_irqrestore(&mvchip->lock, flags);
289 static int mvebu_gpio_to_irq(struct gpio_chip *chip, unsigned pin)
291 struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
292 return irq_create_mapping(mvchip->domain, pin);
296 * Functions implementing the irq_chip methods
298 static void mvebu_gpio_irq_ack(struct irq_data *d)
300 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
301 struct mvebu_gpio_chip *mvchip = gc->private;
305 writel_relaxed(~mask, mvebu_gpioreg_edge_cause(mvchip));
309 static void mvebu_gpio_edge_irq_mask(struct irq_data *d)
311 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
312 struct mvebu_gpio_chip *mvchip = gc->private;
313 struct irq_chip_type *ct = irq_data_get_chip_type(d);
317 ct->mask_cache_priv &= ~mask;
319 writel_relaxed(ct->mask_cache_priv, mvebu_gpioreg_edge_mask(mvchip));
323 static void mvebu_gpio_edge_irq_unmask(struct irq_data *d)
325 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
326 struct mvebu_gpio_chip *mvchip = gc->private;
327 struct irq_chip_type *ct = irq_data_get_chip_type(d);
331 ct->mask_cache_priv |= mask;
332 writel_relaxed(ct->mask_cache_priv, mvebu_gpioreg_edge_mask(mvchip));
336 static void mvebu_gpio_level_irq_mask(struct irq_data *d)
338 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
339 struct mvebu_gpio_chip *mvchip = gc->private;
340 struct irq_chip_type *ct = irq_data_get_chip_type(d);
344 ct->mask_cache_priv &= ~mask;
345 writel_relaxed(ct->mask_cache_priv, mvebu_gpioreg_level_mask(mvchip));
349 static void mvebu_gpio_level_irq_unmask(struct irq_data *d)
351 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
352 struct mvebu_gpio_chip *mvchip = gc->private;
353 struct irq_chip_type *ct = irq_data_get_chip_type(d);
357 ct->mask_cache_priv |= mask;
358 writel_relaxed(ct->mask_cache_priv, mvebu_gpioreg_level_mask(mvchip));
362 /*****************************************************************************
365 * GPIO_IN_POL register controls whether GPIO_DATA_IN will hold the same
366 * value of the line or the opposite value.
368 * Level IRQ handlers: DATA_IN is used directly as cause register.
369 * Interrupt are masked by LEVEL_MASK registers.
370 * Edge IRQ handlers: Change in DATA_IN are latched in EDGE_CAUSE.
371 * Interrupt are masked by EDGE_MASK registers.
372 * Both-edge handlers: Similar to regular Edge handlers, but also swaps
373 * the polarity to catch the next line transaction.
374 * This is a race condition that might not perfectly
375 * work on some use cases.
377 * Every eight GPIO lines are grouped (OR'ed) before going up to main
381 * data-in /--------| |-----| |----\
382 * -----| |----- ---- to main cause reg
383 * X \----------------| |----/
384 * polarity LEVEL mask
386 ****************************************************************************/
388 static int mvebu_gpio_irq_set_type(struct irq_data *d, unsigned int type)
390 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
391 struct irq_chip_type *ct = irq_data_get_chip_type(d);
392 struct mvebu_gpio_chip *mvchip = gc->private;
398 u = readl_relaxed(mvebu_gpioreg_io_conf(mvchip)) & (1 << pin);
402 type &= IRQ_TYPE_SENSE_MASK;
403 if (type == IRQ_TYPE_NONE)
406 /* Check if we need to change chip and handler */
407 if (!(ct->type & type))
408 if (irq_setup_alt_chip(d, type))
412 * Configure interrupt polarity.
415 case IRQ_TYPE_EDGE_RISING:
416 case IRQ_TYPE_LEVEL_HIGH:
417 u = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
419 writel_relaxed(u, mvebu_gpioreg_in_pol(mvchip));
421 case IRQ_TYPE_EDGE_FALLING:
422 case IRQ_TYPE_LEVEL_LOW:
423 u = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
425 writel_relaxed(u, mvebu_gpioreg_in_pol(mvchip));
427 case IRQ_TYPE_EDGE_BOTH: {
430 v = readl_relaxed(mvebu_gpioreg_in_pol(mvchip)) ^
431 readl_relaxed(mvebu_gpioreg_data_in(mvchip));
434 * set initial polarity based on current input level
436 u = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
438 u |= 1 << pin; /* falling */
440 u &= ~(1 << pin); /* rising */
441 writel_relaxed(u, mvebu_gpioreg_in_pol(mvchip));
448 static void mvebu_gpio_irq_handler(struct irq_desc *desc)
450 struct mvebu_gpio_chip *mvchip = irq_desc_get_handler_data(desc);
451 struct irq_chip *chip = irq_desc_get_chip(desc);
458 chained_irq_enter(chip, desc);
460 cause = readl_relaxed(mvebu_gpioreg_data_in(mvchip)) &
461 readl_relaxed(mvebu_gpioreg_level_mask(mvchip));
462 cause |= readl_relaxed(mvebu_gpioreg_edge_cause(mvchip)) &
463 readl_relaxed(mvebu_gpioreg_edge_mask(mvchip));
465 for (i = 0; i < mvchip->chip.ngpio; i++) {
468 irq = irq_find_mapping(mvchip->domain, i);
470 if (!(cause & (1 << i)))
473 type = irq_get_trigger_type(irq);
474 if ((type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) {
475 /* Swap polarity (race with GPIO line) */
478 polarity = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
480 writel_relaxed(polarity, mvebu_gpioreg_in_pol(mvchip));
483 generic_handle_irq(irq);
486 chained_irq_exit(chip, desc);
489 #ifdef CONFIG_DEBUG_FS
490 #include <linux/seq_file.h>
492 static void mvebu_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
494 struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
495 u32 out, io_conf, blink, in_pol, data_in, cause, edg_msk, lvl_msk;
498 out = readl_relaxed(mvebu_gpioreg_out(mvchip));
499 io_conf = readl_relaxed(mvebu_gpioreg_io_conf(mvchip));
500 blink = readl_relaxed(mvebu_gpioreg_blink(mvchip));
501 in_pol = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
502 data_in = readl_relaxed(mvebu_gpioreg_data_in(mvchip));
503 cause = readl_relaxed(mvebu_gpioreg_edge_cause(mvchip));
504 edg_msk = readl_relaxed(mvebu_gpioreg_edge_mask(mvchip));
505 lvl_msk = readl_relaxed(mvebu_gpioreg_level_mask(mvchip));
507 for (i = 0; i < chip->ngpio; i++) {
512 label = gpiochip_is_requested(chip, i);
517 is_out = !(io_conf & msk);
519 seq_printf(s, " gpio-%-3d (%-20.20s)", chip->base + i, label);
522 seq_printf(s, " out %s %s\n",
523 out & msk ? "hi" : "lo",
524 blink & msk ? "(blink )" : "");
528 seq_printf(s, " in %s (act %s) - IRQ",
529 (data_in ^ in_pol) & msk ? "hi" : "lo",
530 in_pol & msk ? "lo" : "hi");
531 if (!((edg_msk | lvl_msk) & msk)) {
532 seq_puts(s, " disabled\n");
536 seq_puts(s, " edge ");
538 seq_puts(s, " level");
539 seq_printf(s, " (%s)\n", cause & msk ? "pending" : "clear ");
543 #define mvebu_gpio_dbg_show NULL
546 static const struct of_device_id mvebu_gpio_of_match[] = {
548 .compatible = "marvell,orion-gpio",
549 .data = (void *) MVEBU_GPIO_SOC_VARIANT_ORION,
552 .compatible = "marvell,mv78200-gpio",
553 .data = (void *) MVEBU_GPIO_SOC_VARIANT_MV78200,
556 .compatible = "marvell,armadaxp-gpio",
557 .data = (void *) MVEBU_GPIO_SOC_VARIANT_ARMADAXP,
564 static int mvebu_gpio_suspend(struct platform_device *pdev, pm_message_t state)
566 struct mvebu_gpio_chip *mvchip = platform_get_drvdata(pdev);
569 mvchip->out_reg = readl(mvebu_gpioreg_out(mvchip));
570 mvchip->io_conf_reg = readl(mvebu_gpioreg_io_conf(mvchip));
571 mvchip->blink_en_reg = readl(mvebu_gpioreg_blink(mvchip));
572 mvchip->in_pol_reg = readl(mvebu_gpioreg_in_pol(mvchip));
574 switch (mvchip->soc_variant) {
575 case MVEBU_GPIO_SOC_VARIANT_ORION:
576 mvchip->edge_mask_regs[0] =
577 readl(mvchip->membase + GPIO_EDGE_MASK_OFF);
578 mvchip->level_mask_regs[0] =
579 readl(mvchip->membase + GPIO_LEVEL_MASK_OFF);
581 case MVEBU_GPIO_SOC_VARIANT_MV78200:
582 for (i = 0; i < 2; i++) {
583 mvchip->edge_mask_regs[i] =
584 readl(mvchip->membase +
585 GPIO_EDGE_MASK_MV78200_OFF(i));
586 mvchip->level_mask_regs[i] =
587 readl(mvchip->membase +
588 GPIO_LEVEL_MASK_MV78200_OFF(i));
591 case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
592 for (i = 0; i < 4; i++) {
593 mvchip->edge_mask_regs[i] =
594 readl(mvchip->membase +
595 GPIO_EDGE_MASK_ARMADAXP_OFF(i));
596 mvchip->level_mask_regs[i] =
597 readl(mvchip->membase +
598 GPIO_LEVEL_MASK_ARMADAXP_OFF(i));
608 static int mvebu_gpio_resume(struct platform_device *pdev)
610 struct mvebu_gpio_chip *mvchip = platform_get_drvdata(pdev);
613 writel(mvchip->out_reg, mvebu_gpioreg_out(mvchip));
614 writel(mvchip->io_conf_reg, mvebu_gpioreg_io_conf(mvchip));
615 writel(mvchip->blink_en_reg, mvebu_gpioreg_blink(mvchip));
616 writel(mvchip->in_pol_reg, mvebu_gpioreg_in_pol(mvchip));
618 switch (mvchip->soc_variant) {
619 case MVEBU_GPIO_SOC_VARIANT_ORION:
620 writel(mvchip->edge_mask_regs[0],
621 mvchip->membase + GPIO_EDGE_MASK_OFF);
622 writel(mvchip->level_mask_regs[0],
623 mvchip->membase + GPIO_LEVEL_MASK_OFF);
625 case MVEBU_GPIO_SOC_VARIANT_MV78200:
626 for (i = 0; i < 2; i++) {
627 writel(mvchip->edge_mask_regs[i],
628 mvchip->membase + GPIO_EDGE_MASK_MV78200_OFF(i));
629 writel(mvchip->level_mask_regs[i],
631 GPIO_LEVEL_MASK_MV78200_OFF(i));
634 case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
635 for (i = 0; i < 4; i++) {
636 writel(mvchip->edge_mask_regs[i],
638 GPIO_EDGE_MASK_ARMADAXP_OFF(i));
639 writel(mvchip->level_mask_regs[i],
641 GPIO_LEVEL_MASK_ARMADAXP_OFF(i));
651 static int mvebu_gpio_probe(struct platform_device *pdev)
653 struct mvebu_gpio_chip *mvchip;
654 const struct of_device_id *match;
655 struct device_node *np = pdev->dev.of_node;
656 struct resource *res;
657 struct irq_chip_generic *gc;
658 struct irq_chip_type *ct;
666 match = of_match_device(mvebu_gpio_of_match, &pdev->dev);
668 soc_variant = (unsigned long) match->data;
670 soc_variant = MVEBU_GPIO_SOC_VARIANT_ORION;
672 /* Some gpio controllers do not provide irq support */
673 have_irqs = of_irq_count(np) != 0;
675 mvchip = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_gpio_chip),
680 platform_set_drvdata(pdev, mvchip);
682 if (of_property_read_u32(pdev->dev.of_node, "ngpios", &ngpios)) {
683 dev_err(&pdev->dev, "Missing ngpios OF property\n");
687 id = of_alias_get_id(pdev->dev.of_node, "gpio");
689 dev_err(&pdev->dev, "Couldn't get OF id\n");
693 clk = devm_clk_get(&pdev->dev, NULL);
694 /* Not all SoCs require a clock.*/
696 clk_prepare_enable(clk);
698 mvchip->soc_variant = soc_variant;
699 mvchip->chip.label = dev_name(&pdev->dev);
700 mvchip->chip.parent = &pdev->dev;
701 mvchip->chip.request = gpiochip_generic_request;
702 mvchip->chip.free = gpiochip_generic_free;
703 mvchip->chip.direction_input = mvebu_gpio_direction_input;
704 mvchip->chip.get = mvebu_gpio_get;
705 mvchip->chip.direction_output = mvebu_gpio_direction_output;
706 mvchip->chip.set = mvebu_gpio_set;
708 mvchip->chip.to_irq = mvebu_gpio_to_irq;
709 mvchip->chip.base = id * MVEBU_MAX_GPIO_PER_BANK;
710 mvchip->chip.ngpio = ngpios;
711 mvchip->chip.can_sleep = false;
712 mvchip->chip.of_node = np;
713 mvchip->chip.dbg_show = mvebu_gpio_dbg_show;
715 spin_lock_init(&mvchip->lock);
716 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
717 mvchip->membase = devm_ioremap_resource(&pdev->dev, res);
718 if (IS_ERR(mvchip->membase))
719 return PTR_ERR(mvchip->membase);
722 * The Armada XP has a second range of registers for the
725 if (soc_variant == MVEBU_GPIO_SOC_VARIANT_ARMADAXP) {
726 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
727 mvchip->percpu_membase = devm_ioremap_resource(&pdev->dev,
729 if (IS_ERR(mvchip->percpu_membase))
730 return PTR_ERR(mvchip->percpu_membase);
734 * Mask and clear GPIO interrupts.
736 switch (soc_variant) {
737 case MVEBU_GPIO_SOC_VARIANT_ORION:
738 writel_relaxed(0, mvchip->membase + GPIO_EDGE_CAUSE_OFF);
739 writel_relaxed(0, mvchip->membase + GPIO_EDGE_MASK_OFF);
740 writel_relaxed(0, mvchip->membase + GPIO_LEVEL_MASK_OFF);
742 case MVEBU_GPIO_SOC_VARIANT_MV78200:
743 writel_relaxed(0, mvchip->membase + GPIO_EDGE_CAUSE_OFF);
744 for (cpu = 0; cpu < 2; cpu++) {
745 writel_relaxed(0, mvchip->membase +
746 GPIO_EDGE_MASK_MV78200_OFF(cpu));
747 writel_relaxed(0, mvchip->membase +
748 GPIO_LEVEL_MASK_MV78200_OFF(cpu));
751 case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
752 writel_relaxed(0, mvchip->membase + GPIO_EDGE_CAUSE_OFF);
753 writel_relaxed(0, mvchip->membase + GPIO_EDGE_MASK_OFF);
754 writel_relaxed(0, mvchip->membase + GPIO_LEVEL_MASK_OFF);
755 for (cpu = 0; cpu < 4; cpu++) {
756 writel_relaxed(0, mvchip->percpu_membase +
757 GPIO_EDGE_CAUSE_ARMADAXP_OFF(cpu));
758 writel_relaxed(0, mvchip->percpu_membase +
759 GPIO_EDGE_MASK_ARMADAXP_OFF(cpu));
760 writel_relaxed(0, mvchip->percpu_membase +
761 GPIO_LEVEL_MASK_ARMADAXP_OFF(cpu));
768 devm_gpiochip_add_data(&pdev->dev, &mvchip->chip, mvchip);
770 /* Some gpio controllers do not provide irq support */
775 irq_domain_add_linear(np, ngpios, &irq_generic_chip_ops, NULL);
776 if (!mvchip->domain) {
777 dev_err(&pdev->dev, "couldn't allocate irq domain %s (DT).\n",
782 err = irq_alloc_domain_generic_chips(
783 mvchip->domain, ngpios, 2, np->name, handle_level_irq,
784 IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_LEVEL, 0, 0);
786 dev_err(&pdev->dev, "couldn't allocate irq chips %s (DT).\n",
791 /* NOTE: The common accessors cannot be used because of the percpu
792 * access to the mask registers
794 gc = irq_get_domain_generic_chip(mvchip->domain, 0);
795 gc->private = mvchip;
796 ct = &gc->chip_types[0];
797 ct->type = IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW;
798 ct->chip.irq_mask = mvebu_gpio_level_irq_mask;
799 ct->chip.irq_unmask = mvebu_gpio_level_irq_unmask;
800 ct->chip.irq_set_type = mvebu_gpio_irq_set_type;
801 ct->chip.name = mvchip->chip.label;
803 ct = &gc->chip_types[1];
804 ct->type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
805 ct->chip.irq_ack = mvebu_gpio_irq_ack;
806 ct->chip.irq_mask = mvebu_gpio_edge_irq_mask;
807 ct->chip.irq_unmask = mvebu_gpio_edge_irq_unmask;
808 ct->chip.irq_set_type = mvebu_gpio_irq_set_type;
809 ct->handler = handle_edge_irq;
810 ct->chip.name = mvchip->chip.label;
812 /* Setup the interrupt handlers. Each chip can have up to 4
813 * interrupt handlers, with each handler dealing with 8 GPIO
816 for (i = 0; i < 4; i++) {
817 int irq = platform_get_irq(pdev, i);
821 irq_set_chained_handler_and_data(irq, mvebu_gpio_irq_handler,
828 irq_domain_remove(mvchip->domain);
833 static struct platform_driver mvebu_gpio_driver = {
835 .name = "mvebu-gpio",
836 .of_match_table = mvebu_gpio_of_match,
838 .probe = mvebu_gpio_probe,
839 .suspend = mvebu_gpio_suspend,
840 .resume = mvebu_gpio_resume,
842 builtin_platform_driver(mvebu_gpio_driver);