2 * Support functions for OMAP GPIO
4 * Copyright (C) 2003-2005 Nokia Corporation
5 * Written by Juha Yrjölä <juha.yrjola@nokia.com>
7 * Copyright (C) 2009 Texas Instruments
8 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/interrupt.h>
18 #include <linux/syscore_ops.h>
19 #include <linux/err.h>
20 #include <linux/clk.h>
22 #include <linux/device.h>
23 #include <linux/pm_runtime.h>
26 #include <linux/of_device.h>
27 #include <linux/gpio.h>
28 #include <linux/bitops.h>
29 #include <linux/platform_data/gpio-omap.h>
33 static LIST_HEAD(omap_gpio_list);
51 struct list_head node;
55 u32 enabled_non_wakeup_gpios;
56 struct gpio_regs context;
61 struct gpio_chip chip;
74 int context_loss_count;
76 bool workaround_enabled;
78 void (*set_dataout)(struct gpio_bank *bank, unsigned gpio, int enable);
79 int (*get_context_loss_count)(struct device *dev);
81 struct omap_gpio_reg_offs *regs;
84 #define GPIO_MOD_CTRL_BIT BIT(0)
86 #define BANK_USED(bank) (bank->mod_usage || bank->irq_usage)
87 #define LINE_USED(line, offset) (line & (BIT(offset)))
89 static void omap_gpio_unmask_irq(struct irq_data *d);
91 static inline struct gpio_bank *omap_irq_data_get_bank(struct irq_data *d)
93 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
94 return container_of(chip, struct gpio_bank, chip);
97 static void omap_set_gpio_direction(struct gpio_bank *bank, int gpio,
100 void __iomem *reg = bank->base;
103 reg += bank->regs->direction;
104 l = readl_relaxed(reg);
109 writel_relaxed(l, reg);
110 bank->context.oe = l;
114 /* set data out value using dedicate set/clear register */
115 static void omap_set_gpio_dataout_reg(struct gpio_bank *bank, unsigned offset,
118 void __iomem *reg = bank->base;
122 reg += bank->regs->set_dataout;
123 bank->context.dataout |= l;
125 reg += bank->regs->clr_dataout;
126 bank->context.dataout &= ~l;
129 writel_relaxed(l, reg);
132 /* set data out value using mask register */
133 static void omap_set_gpio_dataout_mask(struct gpio_bank *bank, unsigned offset,
136 void __iomem *reg = bank->base + bank->regs->dataout;
137 u32 gpio_bit = BIT(offset);
140 l = readl_relaxed(reg);
145 writel_relaxed(l, reg);
146 bank->context.dataout = l;
149 static int omap_get_gpio_datain(struct gpio_bank *bank, int offset)
151 void __iomem *reg = bank->base + bank->regs->datain;
153 return (readl_relaxed(reg) & (BIT(offset))) != 0;
156 static int omap_get_gpio_dataout(struct gpio_bank *bank, int offset)
158 void __iomem *reg = bank->base + bank->regs->dataout;
160 return (readl_relaxed(reg) & (BIT(offset))) != 0;
163 static inline void omap_gpio_rmw(void __iomem *base, u32 reg, u32 mask, bool set)
165 int l = readl_relaxed(base + reg);
172 writel_relaxed(l, base + reg);
175 static inline void omap_gpio_dbck_enable(struct gpio_bank *bank)
177 if (bank->dbck_enable_mask && !bank->dbck_enabled) {
178 clk_prepare_enable(bank->dbck);
179 bank->dbck_enabled = true;
181 writel_relaxed(bank->dbck_enable_mask,
182 bank->base + bank->regs->debounce_en);
186 static inline void omap_gpio_dbck_disable(struct gpio_bank *bank)
188 if (bank->dbck_enable_mask && bank->dbck_enabled) {
190 * Disable debounce before cutting it's clock. If debounce is
191 * enabled but the clock is not, GPIO module seems to be unable
192 * to detect events and generate interrupts at least on OMAP3.
194 writel_relaxed(0, bank->base + bank->regs->debounce_en);
196 clk_disable_unprepare(bank->dbck);
197 bank->dbck_enabled = false;
202 * omap2_set_gpio_debounce - low level gpio debounce time
203 * @bank: the gpio bank we're acting upon
204 * @offset: the gpio number on this @bank
205 * @debounce: debounce time to use
207 * OMAP's debounce time is in 31us steps so we need
208 * to convert and round up to the closest unit.
210 static void omap2_set_gpio_debounce(struct gpio_bank *bank, unsigned offset,
217 if (!bank->dbck_flag)
222 else if (debounce > 7936)
225 debounce = (debounce / 0x1f) - 1;
229 clk_prepare_enable(bank->dbck);
230 reg = bank->base + bank->regs->debounce;
231 writel_relaxed(debounce, reg);
233 reg = bank->base + bank->regs->debounce_en;
234 val = readl_relaxed(reg);
240 bank->dbck_enable_mask = val;
242 writel_relaxed(val, reg);
243 clk_disable_unprepare(bank->dbck);
245 * Enable debounce clock per module.
246 * This call is mandatory because in omap_gpio_request() when
247 * *_runtime_get_sync() is called, _gpio_dbck_enable() within
248 * runtime callbck fails to turn on dbck because dbck_enable_mask
249 * used within _gpio_dbck_enable() is still not initialized at
250 * that point. Therefore we have to enable dbck here.
252 omap_gpio_dbck_enable(bank);
253 if (bank->dbck_enable_mask) {
254 bank->context.debounce = debounce;
255 bank->context.debounce_en = val;
260 * omap_clear_gpio_debounce - clear debounce settings for a gpio
261 * @bank: the gpio bank we're acting upon
262 * @offset: the gpio number on this @bank
264 * If a gpio is using debounce, then clear the debounce enable bit and if
265 * this is the only gpio in this bank using debounce, then clear the debounce
266 * time too. The debounce clock will also be disabled when calling this function
267 * if this is the only gpio in the bank using debounce.
269 static void omap_clear_gpio_debounce(struct gpio_bank *bank, unsigned offset)
271 u32 gpio_bit = BIT(offset);
273 if (!bank->dbck_flag)
276 if (!(bank->dbck_enable_mask & gpio_bit))
279 bank->dbck_enable_mask &= ~gpio_bit;
280 bank->context.debounce_en &= ~gpio_bit;
281 writel_relaxed(bank->context.debounce_en,
282 bank->base + bank->regs->debounce_en);
284 if (!bank->dbck_enable_mask) {
285 bank->context.debounce = 0;
286 writel_relaxed(bank->context.debounce, bank->base +
287 bank->regs->debounce);
288 clk_disable_unprepare(bank->dbck);
289 bank->dbck_enabled = false;
293 static inline void omap_set_gpio_trigger(struct gpio_bank *bank, int gpio,
296 void __iomem *base = bank->base;
297 u32 gpio_bit = BIT(gpio);
299 omap_gpio_rmw(base, bank->regs->leveldetect0, gpio_bit,
300 trigger & IRQ_TYPE_LEVEL_LOW);
301 omap_gpio_rmw(base, bank->regs->leveldetect1, gpio_bit,
302 trigger & IRQ_TYPE_LEVEL_HIGH);
303 omap_gpio_rmw(base, bank->regs->risingdetect, gpio_bit,
304 trigger & IRQ_TYPE_EDGE_RISING);
305 omap_gpio_rmw(base, bank->regs->fallingdetect, gpio_bit,
306 trigger & IRQ_TYPE_EDGE_FALLING);
308 bank->context.leveldetect0 =
309 readl_relaxed(bank->base + bank->regs->leveldetect0);
310 bank->context.leveldetect1 =
311 readl_relaxed(bank->base + bank->regs->leveldetect1);
312 bank->context.risingdetect =
313 readl_relaxed(bank->base + bank->regs->risingdetect);
314 bank->context.fallingdetect =
315 readl_relaxed(bank->base + bank->regs->fallingdetect);
317 if (likely(!(bank->non_wakeup_gpios & gpio_bit))) {
318 omap_gpio_rmw(base, bank->regs->wkup_en, gpio_bit, trigger != 0);
319 bank->context.wake_en =
320 readl_relaxed(bank->base + bank->regs->wkup_en);
323 /* This part needs to be executed always for OMAP{34xx, 44xx} */
324 if (!bank->regs->irqctrl) {
325 /* On omap24xx proceed only when valid GPIO bit is set */
326 if (bank->non_wakeup_gpios) {
327 if (!(bank->non_wakeup_gpios & gpio_bit))
332 * Log the edge gpio and manually trigger the IRQ
333 * after resume if the input level changes
334 * to avoid irq lost during PER RET/OFF mode
335 * Applies for omap2 non-wakeup gpio and all omap3 gpios
337 if (trigger & IRQ_TYPE_EDGE_BOTH)
338 bank->enabled_non_wakeup_gpios |= gpio_bit;
340 bank->enabled_non_wakeup_gpios &= ~gpio_bit;
345 readl_relaxed(bank->base + bank->regs->leveldetect0) |
346 readl_relaxed(bank->base + bank->regs->leveldetect1);
349 #ifdef CONFIG_ARCH_OMAP1
351 * This only applies to chips that can't do both rising and falling edge
352 * detection at once. For all other chips, this function is a noop.
354 static void omap_toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio)
356 void __iomem *reg = bank->base;
359 if (!bank->regs->irqctrl)
362 reg += bank->regs->irqctrl;
364 l = readl_relaxed(reg);
370 writel_relaxed(l, reg);
373 static void omap_toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio) {}
376 static int omap_set_gpio_triggering(struct gpio_bank *bank, int gpio,
379 void __iomem *reg = bank->base;
380 void __iomem *base = bank->base;
383 if (bank->regs->leveldetect0 && bank->regs->wkup_en) {
384 omap_set_gpio_trigger(bank, gpio, trigger);
385 } else if (bank->regs->irqctrl) {
386 reg += bank->regs->irqctrl;
388 l = readl_relaxed(reg);
389 if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
390 bank->toggle_mask |= BIT(gpio);
391 if (trigger & IRQ_TYPE_EDGE_RISING)
393 else if (trigger & IRQ_TYPE_EDGE_FALLING)
398 writel_relaxed(l, reg);
399 } else if (bank->regs->edgectrl1) {
401 reg += bank->regs->edgectrl2;
403 reg += bank->regs->edgectrl1;
406 l = readl_relaxed(reg);
407 l &= ~(3 << (gpio << 1));
408 if (trigger & IRQ_TYPE_EDGE_RISING)
409 l |= 2 << (gpio << 1);
410 if (trigger & IRQ_TYPE_EDGE_FALLING)
413 /* Enable wake-up during idle for dynamic tick */
414 omap_gpio_rmw(base, bank->regs->wkup_en, BIT(gpio), trigger);
415 bank->context.wake_en =
416 readl_relaxed(bank->base + bank->regs->wkup_en);
417 writel_relaxed(l, reg);
422 static void omap_enable_gpio_module(struct gpio_bank *bank, unsigned offset)
424 if (bank->regs->pinctrl) {
425 void __iomem *reg = bank->base + bank->regs->pinctrl;
427 /* Claim the pin for MPU */
428 writel_relaxed(readl_relaxed(reg) | (BIT(offset)), reg);
431 if (bank->regs->ctrl && !BANK_USED(bank)) {
432 void __iomem *reg = bank->base + bank->regs->ctrl;
435 ctrl = readl_relaxed(reg);
436 /* Module is enabled, clocks are not gated */
437 ctrl &= ~GPIO_MOD_CTRL_BIT;
438 writel_relaxed(ctrl, reg);
439 bank->context.ctrl = ctrl;
443 static void omap_disable_gpio_module(struct gpio_bank *bank, unsigned offset)
445 void __iomem *base = bank->base;
447 if (bank->regs->wkup_en &&
448 !LINE_USED(bank->mod_usage, offset) &&
449 !LINE_USED(bank->irq_usage, offset)) {
450 /* Disable wake-up during idle for dynamic tick */
451 omap_gpio_rmw(base, bank->regs->wkup_en, BIT(offset), 0);
452 bank->context.wake_en =
453 readl_relaxed(bank->base + bank->regs->wkup_en);
456 if (bank->regs->ctrl && !BANK_USED(bank)) {
457 void __iomem *reg = bank->base + bank->regs->ctrl;
460 ctrl = readl_relaxed(reg);
461 /* Module is disabled, clocks are gated */
462 ctrl |= GPIO_MOD_CTRL_BIT;
463 writel_relaxed(ctrl, reg);
464 bank->context.ctrl = ctrl;
468 static int omap_gpio_is_input(struct gpio_bank *bank, unsigned offset)
470 void __iomem *reg = bank->base + bank->regs->direction;
472 return readl_relaxed(reg) & BIT(offset);
475 static void omap_gpio_init_irq(struct gpio_bank *bank, unsigned offset)
477 if (!LINE_USED(bank->mod_usage, offset)) {
478 omap_enable_gpio_module(bank, offset);
479 omap_set_gpio_direction(bank, offset, 1);
481 bank->irq_usage |= BIT(offset);
484 static int omap_gpio_irq_type(struct irq_data *d, unsigned type)
486 struct gpio_bank *bank = omap_irq_data_get_bank(d);
489 unsigned offset = d->hwirq;
491 if (type & ~IRQ_TYPE_SENSE_MASK)
494 if (!bank->regs->leveldetect0 &&
495 (type & (IRQ_TYPE_LEVEL_LOW|IRQ_TYPE_LEVEL_HIGH)))
498 if (!BANK_USED(bank))
499 pm_runtime_get_sync(bank->dev);
501 spin_lock_irqsave(&bank->lock, flags);
502 retval = omap_set_gpio_triggering(bank, offset, type);
504 spin_unlock_irqrestore(&bank->lock, flags);
507 omap_gpio_init_irq(bank, offset);
508 if (!omap_gpio_is_input(bank, offset)) {
509 spin_unlock_irqrestore(&bank->lock, flags);
513 spin_unlock_irqrestore(&bank->lock, flags);
515 if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
516 __irq_set_handler_locked(d->irq, handle_level_irq);
517 else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
518 __irq_set_handler_locked(d->irq, handle_edge_irq);
523 if (!BANK_USED(bank))
524 pm_runtime_put(bank->dev);
528 static void omap_clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
530 void __iomem *reg = bank->base;
532 reg += bank->regs->irqstatus;
533 writel_relaxed(gpio_mask, reg);
535 /* Workaround for clearing DSP GPIO interrupts to allow retention */
536 if (bank->regs->irqstatus2) {
537 reg = bank->base + bank->regs->irqstatus2;
538 writel_relaxed(gpio_mask, reg);
541 /* Flush posted write for the irq status to avoid spurious interrupts */
545 static inline void omap_clear_gpio_irqstatus(struct gpio_bank *bank,
548 omap_clear_gpio_irqbank(bank, BIT(offset));
551 static u32 omap_get_gpio_irqbank_mask(struct gpio_bank *bank)
553 void __iomem *reg = bank->base;
555 u32 mask = (BIT(bank->width)) - 1;
557 reg += bank->regs->irqenable;
558 l = readl_relaxed(reg);
559 if (bank->regs->irqenable_inv)
565 static void omap_enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
567 void __iomem *reg = bank->base;
570 if (bank->regs->set_irqenable) {
571 reg += bank->regs->set_irqenable;
573 bank->context.irqenable1 |= gpio_mask;
575 reg += bank->regs->irqenable;
576 l = readl_relaxed(reg);
577 if (bank->regs->irqenable_inv)
581 bank->context.irqenable1 = l;
584 writel_relaxed(l, reg);
587 static void omap_disable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
589 void __iomem *reg = bank->base;
592 if (bank->regs->clr_irqenable) {
593 reg += bank->regs->clr_irqenable;
595 bank->context.irqenable1 &= ~gpio_mask;
597 reg += bank->regs->irqenable;
598 l = readl_relaxed(reg);
599 if (bank->regs->irqenable_inv)
603 bank->context.irqenable1 = l;
606 writel_relaxed(l, reg);
609 static inline void omap_set_gpio_irqenable(struct gpio_bank *bank,
610 unsigned offset, int enable)
613 omap_enable_gpio_irqbank(bank, BIT(offset));
615 omap_disable_gpio_irqbank(bank, BIT(offset));
619 * Note that ENAWAKEUP needs to be enabled in GPIO_SYSCONFIG register.
620 * 1510 does not seem to have a wake-up register. If JTAG is connected
621 * to the target, system will wake up always on GPIO events. While
622 * system is running all registered GPIO interrupts need to have wake-up
623 * enabled. When system is suspended, only selected GPIO interrupts need
624 * to have wake-up enabled.
626 static int omap_set_gpio_wakeup(struct gpio_bank *bank, unsigned offset,
629 u32 gpio_bit = BIT(offset);
632 if (bank->non_wakeup_gpios & gpio_bit) {
634 "Unable to modify wakeup on non-wakeup GPIO%d\n",
639 spin_lock_irqsave(&bank->lock, flags);
641 bank->context.wake_en |= gpio_bit;
643 bank->context.wake_en &= ~gpio_bit;
645 writel_relaxed(bank->context.wake_en, bank->base + bank->regs->wkup_en);
646 spin_unlock_irqrestore(&bank->lock, flags);
651 /* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
652 static int omap_gpio_wake_enable(struct irq_data *d, unsigned int enable)
654 struct gpio_bank *bank = omap_irq_data_get_bank(d);
655 unsigned offset = d->hwirq;
657 return omap_set_gpio_wakeup(bank, offset, enable);
660 static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
662 struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip);
666 * If this is the first gpio_request for the bank,
667 * enable the bank module.
669 if (!BANK_USED(bank))
670 pm_runtime_get_sync(bank->dev);
672 spin_lock_irqsave(&bank->lock, flags);
673 omap_enable_gpio_module(bank, offset);
674 bank->mod_usage |= BIT(offset);
675 spin_unlock_irqrestore(&bank->lock, flags);
680 static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
682 struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip);
685 spin_lock_irqsave(&bank->lock, flags);
686 bank->mod_usage &= ~(BIT(offset));
687 if (!LINE_USED(bank->irq_usage, offset)) {
688 omap_set_gpio_direction(bank, offset, 1);
689 omap_clear_gpio_debounce(bank, offset);
691 omap_disable_gpio_module(bank, offset);
692 spin_unlock_irqrestore(&bank->lock, flags);
695 * If this is the last gpio to be freed in the bank,
696 * disable the bank module.
698 if (!BANK_USED(bank))
699 pm_runtime_put(bank->dev);
703 * We need to unmask the GPIO bank interrupt as soon as possible to
704 * avoid missing GPIO interrupts for other lines in the bank.
705 * Then we need to mask-read-clear-unmask the triggered GPIO lines
706 * in the bank to avoid missing nested interrupts for a GPIO line.
707 * If we wait to unmask individual GPIO lines in the bank after the
708 * line's interrupt handler has been run, we may miss some nested
711 static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
713 void __iomem *isr_reg = NULL;
716 struct gpio_bank *bank;
718 struct irq_chip *irqchip = irq_desc_get_chip(desc);
719 struct gpio_chip *chip = irq_get_handler_data(irq);
721 chained_irq_enter(irqchip, desc);
723 bank = container_of(chip, struct gpio_bank, chip);
724 isr_reg = bank->base + bank->regs->irqstatus;
725 pm_runtime_get_sync(bank->dev);
727 if (WARN_ON(!isr_reg))
731 u32 isr_saved, level_mask = 0;
734 enabled = omap_get_gpio_irqbank_mask(bank);
735 isr_saved = isr = readl_relaxed(isr_reg) & enabled;
737 if (bank->level_mask)
738 level_mask = bank->level_mask & enabled;
740 /* clear edge sensitive interrupts before handler(s) are
741 called so that we don't miss any interrupt occurred while
743 omap_disable_gpio_irqbank(bank, isr_saved & ~level_mask);
744 omap_clear_gpio_irqbank(bank, isr_saved & ~level_mask);
745 omap_enable_gpio_irqbank(bank, isr_saved & ~level_mask);
747 /* if there is only edge sensitive GPIO pin interrupts
748 configured, we could unmask GPIO bank interrupt immediately */
749 if (!level_mask && !unmasked) {
751 chained_irq_exit(irqchip, desc);
762 * Some chips can't respond to both rising and falling
763 * at the same time. If this irq was requested with
764 * both flags, we need to flip the ICR data for the IRQ
765 * to respond to the IRQ for the opposite direction.
766 * This will be indicated in the bank toggle_mask.
768 if (bank->toggle_mask & (BIT(bit)))
769 omap_toggle_gpio_edge_triggering(bank, bit);
771 generic_handle_irq(irq_find_mapping(bank->chip.irqdomain,
775 /* if bank has any level sensitive GPIO pin interrupt
776 configured, we must unmask the bank interrupt only after
777 handler(s) are executed in order to avoid spurious bank
781 chained_irq_exit(irqchip, desc);
782 pm_runtime_put(bank->dev);
785 static unsigned int omap_gpio_irq_startup(struct irq_data *d)
787 struct gpio_bank *bank = omap_irq_data_get_bank(d);
789 unsigned offset = d->hwirq;
791 if (!BANK_USED(bank))
792 pm_runtime_get_sync(bank->dev);
794 spin_lock_irqsave(&bank->lock, flags);
796 if (!LINE_USED(bank->mod_usage, offset))
797 omap_set_gpio_direction(bank, offset, 1);
798 else if (!omap_gpio_is_input(bank, offset))
800 omap_enable_gpio_module(bank, offset);
801 bank->irq_usage |= BIT(offset);
803 spin_unlock_irqrestore(&bank->lock, flags);
804 omap_gpio_unmask_irq(d);
808 spin_unlock_irqrestore(&bank->lock, flags);
809 if (!BANK_USED(bank))
810 pm_runtime_put(bank->dev);
814 static void omap_gpio_irq_shutdown(struct irq_data *d)
816 struct gpio_bank *bank = omap_irq_data_get_bank(d);
818 unsigned offset = d->hwirq;
820 spin_lock_irqsave(&bank->lock, flags);
821 bank->irq_usage &= ~(BIT(offset));
822 omap_set_gpio_irqenable(bank, offset, 0);
823 omap_clear_gpio_irqstatus(bank, offset);
824 omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
825 if (!LINE_USED(bank->mod_usage, offset))
826 omap_clear_gpio_debounce(bank, offset);
827 omap_disable_gpio_module(bank, offset);
828 spin_unlock_irqrestore(&bank->lock, flags);
831 * If this is the last IRQ to be freed in the bank,
832 * disable the bank module.
834 if (!BANK_USED(bank))
835 pm_runtime_put(bank->dev);
838 static void omap_gpio_ack_irq(struct irq_data *d)
840 struct gpio_bank *bank = omap_irq_data_get_bank(d);
841 unsigned offset = d->hwirq;
843 omap_clear_gpio_irqstatus(bank, offset);
846 static void omap_gpio_mask_irq(struct irq_data *d)
848 struct gpio_bank *bank = omap_irq_data_get_bank(d);
849 unsigned offset = d->hwirq;
852 spin_lock_irqsave(&bank->lock, flags);
853 omap_set_gpio_irqenable(bank, offset, 0);
854 omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
855 spin_unlock_irqrestore(&bank->lock, flags);
858 static void omap_gpio_unmask_irq(struct irq_data *d)
860 struct gpio_bank *bank = omap_irq_data_get_bank(d);
861 unsigned offset = d->hwirq;
862 u32 trigger = irqd_get_trigger_type(d);
865 spin_lock_irqsave(&bank->lock, flags);
867 omap_set_gpio_triggering(bank, offset, trigger);
869 /* For level-triggered GPIOs, the clearing must be done after
870 * the HW source is cleared, thus after the handler has run */
871 if (bank->level_mask & BIT(offset)) {
872 omap_set_gpio_irqenable(bank, offset, 0);
873 omap_clear_gpio_irqstatus(bank, offset);
876 omap_set_gpio_irqenable(bank, offset, 1);
877 spin_unlock_irqrestore(&bank->lock, flags);
880 /*---------------------------------------------------------------------*/
882 static int omap_mpuio_suspend_noirq(struct device *dev)
884 struct platform_device *pdev = to_platform_device(dev);
885 struct gpio_bank *bank = platform_get_drvdata(pdev);
886 void __iomem *mask_reg = bank->base +
887 OMAP_MPUIO_GPIO_MASKIT / bank->stride;
890 spin_lock_irqsave(&bank->lock, flags);
891 writel_relaxed(0xffff & ~bank->context.wake_en, mask_reg);
892 spin_unlock_irqrestore(&bank->lock, flags);
897 static int omap_mpuio_resume_noirq(struct device *dev)
899 struct platform_device *pdev = to_platform_device(dev);
900 struct gpio_bank *bank = platform_get_drvdata(pdev);
901 void __iomem *mask_reg = bank->base +
902 OMAP_MPUIO_GPIO_MASKIT / bank->stride;
905 spin_lock_irqsave(&bank->lock, flags);
906 writel_relaxed(bank->context.wake_en, mask_reg);
907 spin_unlock_irqrestore(&bank->lock, flags);
912 static const struct dev_pm_ops omap_mpuio_dev_pm_ops = {
913 .suspend_noirq = omap_mpuio_suspend_noirq,
914 .resume_noirq = omap_mpuio_resume_noirq,
917 /* use platform_driver for this. */
918 static struct platform_driver omap_mpuio_driver = {
921 .pm = &omap_mpuio_dev_pm_ops,
925 static struct platform_device omap_mpuio_device = {
929 .driver = &omap_mpuio_driver.driver,
931 /* could list the /proc/iomem resources */
934 static inline void omap_mpuio_init(struct gpio_bank *bank)
936 platform_set_drvdata(&omap_mpuio_device, bank);
938 if (platform_driver_register(&omap_mpuio_driver) == 0)
939 (void) platform_device_register(&omap_mpuio_device);
942 /*---------------------------------------------------------------------*/
944 static int omap_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
946 struct gpio_bank *bank;
951 bank = container_of(chip, struct gpio_bank, chip);
952 reg = bank->base + bank->regs->direction;
953 spin_lock_irqsave(&bank->lock, flags);
954 dir = !!(readl_relaxed(reg) & BIT(offset));
955 spin_unlock_irqrestore(&bank->lock, flags);
959 static int omap_gpio_input(struct gpio_chip *chip, unsigned offset)
961 struct gpio_bank *bank;
964 bank = container_of(chip, struct gpio_bank, chip);
965 spin_lock_irqsave(&bank->lock, flags);
966 omap_set_gpio_direction(bank, offset, 1);
967 spin_unlock_irqrestore(&bank->lock, flags);
971 static int omap_gpio_get(struct gpio_chip *chip, unsigned offset)
973 struct gpio_bank *bank;
975 bank = container_of(chip, struct gpio_bank, chip);
977 if (omap_gpio_is_input(bank, offset))
978 return omap_get_gpio_datain(bank, offset);
980 return omap_get_gpio_dataout(bank, offset);
983 static int omap_gpio_output(struct gpio_chip *chip, unsigned offset, int value)
985 struct gpio_bank *bank;
988 bank = container_of(chip, struct gpio_bank, chip);
989 spin_lock_irqsave(&bank->lock, flags);
990 bank->set_dataout(bank, offset, value);
991 omap_set_gpio_direction(bank, offset, 0);
992 spin_unlock_irqrestore(&bank->lock, flags);
996 static int omap_gpio_debounce(struct gpio_chip *chip, unsigned offset,
999 struct gpio_bank *bank;
1000 unsigned long flags;
1002 bank = container_of(chip, struct gpio_bank, chip);
1004 spin_lock_irqsave(&bank->lock, flags);
1005 omap2_set_gpio_debounce(bank, offset, debounce);
1006 spin_unlock_irqrestore(&bank->lock, flags);
1011 static void omap_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
1013 struct gpio_bank *bank;
1014 unsigned long flags;
1016 bank = container_of(chip, struct gpio_bank, chip);
1017 spin_lock_irqsave(&bank->lock, flags);
1018 bank->set_dataout(bank, offset, value);
1019 spin_unlock_irqrestore(&bank->lock, flags);
1022 /*---------------------------------------------------------------------*/
1024 static void __init omap_gpio_show_rev(struct gpio_bank *bank)
1029 if (called || bank->regs->revision == USHRT_MAX)
1032 rev = readw_relaxed(bank->base + bank->regs->revision);
1033 pr_info("OMAP GPIO hardware version %d.%d\n",
1034 (rev >> 4) & 0x0f, rev & 0x0f);
1039 static void omap_gpio_mod_init(struct gpio_bank *bank)
1041 void __iomem *base = bank->base;
1044 if (bank->width == 16)
1047 if (bank->is_mpuio) {
1048 writel_relaxed(l, bank->base + bank->regs->irqenable);
1052 omap_gpio_rmw(base, bank->regs->irqenable, l,
1053 bank->regs->irqenable_inv);
1054 omap_gpio_rmw(base, bank->regs->irqstatus, l,
1055 !bank->regs->irqenable_inv);
1056 if (bank->regs->debounce_en)
1057 writel_relaxed(0, base + bank->regs->debounce_en);
1059 /* Save OE default value (0xffffffff) in the context */
1060 bank->context.oe = readl_relaxed(bank->base + bank->regs->direction);
1061 /* Initialize interface clk ungated, module enabled */
1062 if (bank->regs->ctrl)
1063 writel_relaxed(0, base + bank->regs->ctrl);
1065 bank->dbck = clk_get(bank->dev, "dbclk");
1066 if (IS_ERR(bank->dbck))
1067 dev_err(bank->dev, "Could not get gpio dbck\n");
1070 static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
1077 * REVISIT eventually switch from OMAP-specific gpio structs
1078 * over to the generic ones
1080 bank->chip.request = omap_gpio_request;
1081 bank->chip.free = omap_gpio_free;
1082 bank->chip.get_direction = omap_gpio_get_direction;
1083 bank->chip.direction_input = omap_gpio_input;
1084 bank->chip.get = omap_gpio_get;
1085 bank->chip.direction_output = omap_gpio_output;
1086 bank->chip.set_debounce = omap_gpio_debounce;
1087 bank->chip.set = omap_gpio_set;
1088 if (bank->is_mpuio) {
1089 bank->chip.label = "mpuio";
1090 if (bank->regs->wkup_en)
1091 bank->chip.dev = &omap_mpuio_device.dev;
1092 bank->chip.base = OMAP_MPUIO(0);
1094 bank->chip.label = "gpio";
1095 bank->chip.base = gpio;
1096 gpio += bank->width;
1098 bank->chip.ngpio = bank->width;
1100 ret = gpiochip_add(&bank->chip);
1102 dev_err(bank->dev, "Could not register gpio chip %d\n", ret);
1106 #ifdef CONFIG_ARCH_OMAP1
1108 * REVISIT: Once we have OMAP1 supporting SPARSE_IRQ, we can drop
1109 * irq_alloc_descs() since a base IRQ offset will no longer be needed.
1111 irq_base = irq_alloc_descs(-1, 0, bank->width, 0);
1113 dev_err(bank->dev, "Couldn't allocate IRQ numbers\n");
1118 /* MPUIO is a bit different, reading IRQ status clears it */
1119 if (bank->is_mpuio) {
1120 irqc->irq_ack = dummy_irq_chip.irq_ack;
1121 irqc->irq_mask = irq_gc_mask_set_bit;
1122 irqc->irq_unmask = irq_gc_mask_clr_bit;
1123 if (!bank->regs->wkup_en)
1124 irqc->irq_set_wake = NULL;
1127 ret = gpiochip_irqchip_add(&bank->chip, irqc,
1128 irq_base, omap_gpio_irq_handler,
1132 dev_err(bank->dev, "Couldn't add irqchip to gpiochip %d\n", ret);
1133 gpiochip_remove(&bank->chip);
1137 gpiochip_set_chained_irqchip(&bank->chip, irqc,
1138 bank->irq, omap_gpio_irq_handler);
1143 static const struct of_device_id omap_gpio_match[];
1145 static int omap_gpio_probe(struct platform_device *pdev)
1147 struct device *dev = &pdev->dev;
1148 struct device_node *node = dev->of_node;
1149 const struct of_device_id *match;
1150 const struct omap_gpio_platform_data *pdata;
1151 struct resource *res;
1152 struct gpio_bank *bank;
1153 struct irq_chip *irqc;
1156 match = of_match_device(of_match_ptr(omap_gpio_match), dev);
1158 pdata = match ? match->data : dev_get_platdata(dev);
1162 bank = devm_kzalloc(dev, sizeof(struct gpio_bank), GFP_KERNEL);
1164 dev_err(dev, "Memory alloc failed\n");
1168 irqc = devm_kzalloc(dev, sizeof(*irqc), GFP_KERNEL);
1172 irqc->irq_startup = omap_gpio_irq_startup,
1173 irqc->irq_shutdown = omap_gpio_irq_shutdown,
1174 irqc->irq_ack = omap_gpio_ack_irq,
1175 irqc->irq_mask = omap_gpio_mask_irq,
1176 irqc->irq_unmask = omap_gpio_unmask_irq,
1177 irqc->irq_set_type = omap_gpio_irq_type,
1178 irqc->irq_set_wake = omap_gpio_wake_enable,
1179 irqc->name = dev_name(&pdev->dev);
1181 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1182 if (unlikely(!res)) {
1183 dev_err(dev, "Invalid IRQ resource\n");
1187 bank->irq = res->start;
1189 bank->chip.dev = dev;
1190 bank->chip.owner = THIS_MODULE;
1191 bank->dbck_flag = pdata->dbck_flag;
1192 bank->stride = pdata->bank_stride;
1193 bank->width = pdata->bank_width;
1194 bank->is_mpuio = pdata->is_mpuio;
1195 bank->non_wakeup_gpios = pdata->non_wakeup_gpios;
1196 bank->regs = pdata->regs;
1197 #ifdef CONFIG_OF_GPIO
1198 bank->chip.of_node = of_node_get(node);
1201 if (!of_property_read_bool(node, "ti,gpio-always-on"))
1202 bank->loses_context = true;
1204 bank->loses_context = pdata->loses_context;
1206 if (bank->loses_context)
1207 bank->get_context_loss_count =
1208 pdata->get_context_loss_count;
1211 if (bank->regs->set_dataout && bank->regs->clr_dataout)
1212 bank->set_dataout = omap_set_gpio_dataout_reg;
1214 bank->set_dataout = omap_set_gpio_dataout_mask;
1216 spin_lock_init(&bank->lock);
1218 /* Static mapping, never released */
1219 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1220 bank->base = devm_ioremap_resource(dev, res);
1221 if (IS_ERR(bank->base)) {
1222 irq_domain_remove(bank->chip.irqdomain);
1223 return PTR_ERR(bank->base);
1226 platform_set_drvdata(pdev, bank);
1228 pm_runtime_enable(bank->dev);
1229 pm_runtime_irq_safe(bank->dev);
1230 pm_runtime_get_sync(bank->dev);
1233 omap_mpuio_init(bank);
1235 omap_gpio_mod_init(bank);
1237 ret = omap_gpio_chip_init(bank, irqc);
1241 omap_gpio_show_rev(bank);
1243 pm_runtime_put(bank->dev);
1245 list_add_tail(&bank->node, &omap_gpio_list);
1250 static int omap_gpio_remove(struct platform_device *pdev)
1252 struct gpio_bank *bank = platform_get_drvdata(pdev);
1254 list_del(&bank->node);
1255 gpiochip_remove(&bank->chip);
1256 pm_runtime_disable(bank->dev);
1261 #ifdef CONFIG_ARCH_OMAP2PLUS
1263 #if defined(CONFIG_PM)
1264 static void omap_gpio_restore_context(struct gpio_bank *bank);
1266 static int omap_gpio_runtime_suspend(struct device *dev)
1268 struct platform_device *pdev = to_platform_device(dev);
1269 struct gpio_bank *bank = platform_get_drvdata(pdev);
1271 unsigned long flags;
1272 u32 wake_low, wake_hi;
1274 spin_lock_irqsave(&bank->lock, flags);
1277 * Only edges can generate a wakeup event to the PRCM.
1279 * Therefore, ensure any wake-up capable GPIOs have
1280 * edge-detection enabled before going idle to ensure a wakeup
1281 * to the PRCM is generated on a GPIO transition. (c.f. 34xx
1284 * The normal values will be restored upon ->runtime_resume()
1285 * by writing back the values saved in bank->context.
1287 wake_low = bank->context.leveldetect0 & bank->context.wake_en;
1289 writel_relaxed(wake_low | bank->context.fallingdetect,
1290 bank->base + bank->regs->fallingdetect);
1291 wake_hi = bank->context.leveldetect1 & bank->context.wake_en;
1293 writel_relaxed(wake_hi | bank->context.risingdetect,
1294 bank->base + bank->regs->risingdetect);
1296 if (!bank->enabled_non_wakeup_gpios)
1297 goto update_gpio_context_count;
1299 if (bank->power_mode != OFF_MODE) {
1300 bank->power_mode = 0;
1301 goto update_gpio_context_count;
1304 * If going to OFF, remove triggering for all
1305 * non-wakeup GPIOs. Otherwise spurious IRQs will be
1306 * generated. See OMAP2420 Errata item 1.101.
1308 bank->saved_datain = readl_relaxed(bank->base +
1309 bank->regs->datain);
1310 l1 = bank->context.fallingdetect;
1311 l2 = bank->context.risingdetect;
1313 l1 &= ~bank->enabled_non_wakeup_gpios;
1314 l2 &= ~bank->enabled_non_wakeup_gpios;
1316 writel_relaxed(l1, bank->base + bank->regs->fallingdetect);
1317 writel_relaxed(l2, bank->base + bank->regs->risingdetect);
1319 bank->workaround_enabled = true;
1321 update_gpio_context_count:
1322 if (bank->get_context_loss_count)
1323 bank->context_loss_count =
1324 bank->get_context_loss_count(bank->dev);
1326 omap_gpio_dbck_disable(bank);
1327 spin_unlock_irqrestore(&bank->lock, flags);
1332 static void omap_gpio_init_context(struct gpio_bank *p);
1334 static int omap_gpio_runtime_resume(struct device *dev)
1336 struct platform_device *pdev = to_platform_device(dev);
1337 struct gpio_bank *bank = platform_get_drvdata(pdev);
1338 u32 l = 0, gen, gen0, gen1;
1339 unsigned long flags;
1342 spin_lock_irqsave(&bank->lock, flags);
1345 * On the first resume during the probe, the context has not
1346 * been initialised and so initialise it now. Also initialise
1347 * the context loss count.
1349 if (bank->loses_context && !bank->context_valid) {
1350 omap_gpio_init_context(bank);
1352 if (bank->get_context_loss_count)
1353 bank->context_loss_count =
1354 bank->get_context_loss_count(bank->dev);
1357 omap_gpio_dbck_enable(bank);
1360 * In ->runtime_suspend(), level-triggered, wakeup-enabled
1361 * GPIOs were set to edge trigger also in order to be able to
1362 * generate a PRCM wakeup. Here we restore the
1363 * pre-runtime_suspend() values for edge triggering.
1365 writel_relaxed(bank->context.fallingdetect,
1366 bank->base + bank->regs->fallingdetect);
1367 writel_relaxed(bank->context.risingdetect,
1368 bank->base + bank->regs->risingdetect);
1370 if (bank->loses_context) {
1371 if (!bank->get_context_loss_count) {
1372 omap_gpio_restore_context(bank);
1374 c = bank->get_context_loss_count(bank->dev);
1375 if (c != bank->context_loss_count) {
1376 omap_gpio_restore_context(bank);
1378 spin_unlock_irqrestore(&bank->lock, flags);
1384 if (!bank->workaround_enabled) {
1385 spin_unlock_irqrestore(&bank->lock, flags);
1389 l = readl_relaxed(bank->base + bank->regs->datain);
1392 * Check if any of the non-wakeup interrupt GPIOs have changed
1393 * state. If so, generate an IRQ by software. This is
1394 * horribly racy, but it's the best we can do to work around
1397 l ^= bank->saved_datain;
1398 l &= bank->enabled_non_wakeup_gpios;
1401 * No need to generate IRQs for the rising edge for gpio IRQs
1402 * configured with falling edge only; and vice versa.
1404 gen0 = l & bank->context.fallingdetect;
1405 gen0 &= bank->saved_datain;
1407 gen1 = l & bank->context.risingdetect;
1408 gen1 &= ~(bank->saved_datain);
1410 /* FIXME: Consider GPIO IRQs with level detections properly! */
1411 gen = l & (~(bank->context.fallingdetect) &
1412 ~(bank->context.risingdetect));
1413 /* Consider all GPIO IRQs needed to be updated */
1419 old0 = readl_relaxed(bank->base + bank->regs->leveldetect0);
1420 old1 = readl_relaxed(bank->base + bank->regs->leveldetect1);
1422 if (!bank->regs->irqstatus_raw0) {
1423 writel_relaxed(old0 | gen, bank->base +
1424 bank->regs->leveldetect0);
1425 writel_relaxed(old1 | gen, bank->base +
1426 bank->regs->leveldetect1);
1429 if (bank->regs->irqstatus_raw0) {
1430 writel_relaxed(old0 | l, bank->base +
1431 bank->regs->leveldetect0);
1432 writel_relaxed(old1 | l, bank->base +
1433 bank->regs->leveldetect1);
1435 writel_relaxed(old0, bank->base + bank->regs->leveldetect0);
1436 writel_relaxed(old1, bank->base + bank->regs->leveldetect1);
1439 bank->workaround_enabled = false;
1440 spin_unlock_irqrestore(&bank->lock, flags);
1444 #endif /* CONFIG_PM */
1446 #if IS_BUILTIN(CONFIG_GPIO_OMAP)
1447 void omap2_gpio_prepare_for_idle(int pwr_mode)
1449 struct gpio_bank *bank;
1451 list_for_each_entry(bank, &omap_gpio_list, node) {
1452 if (!BANK_USED(bank) || !bank->loses_context)
1455 bank->power_mode = pwr_mode;
1457 pm_runtime_put_sync_suspend(bank->dev);
1461 void omap2_gpio_resume_after_idle(void)
1463 struct gpio_bank *bank;
1465 list_for_each_entry(bank, &omap_gpio_list, node) {
1466 if (!BANK_USED(bank) || !bank->loses_context)
1469 pm_runtime_get_sync(bank->dev);
1474 #if defined(CONFIG_PM)
1475 static void omap_gpio_init_context(struct gpio_bank *p)
1477 struct omap_gpio_reg_offs *regs = p->regs;
1478 void __iomem *base = p->base;
1480 p->context.ctrl = readl_relaxed(base + regs->ctrl);
1481 p->context.oe = readl_relaxed(base + regs->direction);
1482 p->context.wake_en = readl_relaxed(base + regs->wkup_en);
1483 p->context.leveldetect0 = readl_relaxed(base + regs->leveldetect0);
1484 p->context.leveldetect1 = readl_relaxed(base + regs->leveldetect1);
1485 p->context.risingdetect = readl_relaxed(base + regs->risingdetect);
1486 p->context.fallingdetect = readl_relaxed(base + regs->fallingdetect);
1487 p->context.irqenable1 = readl_relaxed(base + regs->irqenable);
1488 p->context.irqenable2 = readl_relaxed(base + regs->irqenable2);
1490 if (regs->set_dataout && p->regs->clr_dataout)
1491 p->context.dataout = readl_relaxed(base + regs->set_dataout);
1493 p->context.dataout = readl_relaxed(base + regs->dataout);
1495 p->context_valid = true;
1498 static void omap_gpio_restore_context(struct gpio_bank *bank)
1500 writel_relaxed(bank->context.wake_en,
1501 bank->base + bank->regs->wkup_en);
1502 writel_relaxed(bank->context.ctrl, bank->base + bank->regs->ctrl);
1503 writel_relaxed(bank->context.leveldetect0,
1504 bank->base + bank->regs->leveldetect0);
1505 writel_relaxed(bank->context.leveldetect1,
1506 bank->base + bank->regs->leveldetect1);
1507 writel_relaxed(bank->context.risingdetect,
1508 bank->base + bank->regs->risingdetect);
1509 writel_relaxed(bank->context.fallingdetect,
1510 bank->base + bank->regs->fallingdetect);
1511 if (bank->regs->set_dataout && bank->regs->clr_dataout)
1512 writel_relaxed(bank->context.dataout,
1513 bank->base + bank->regs->set_dataout);
1515 writel_relaxed(bank->context.dataout,
1516 bank->base + bank->regs->dataout);
1517 writel_relaxed(bank->context.oe, bank->base + bank->regs->direction);
1519 if (bank->dbck_enable_mask) {
1520 writel_relaxed(bank->context.debounce, bank->base +
1521 bank->regs->debounce);
1522 writel_relaxed(bank->context.debounce_en,
1523 bank->base + bank->regs->debounce_en);
1526 writel_relaxed(bank->context.irqenable1,
1527 bank->base + bank->regs->irqenable);
1528 writel_relaxed(bank->context.irqenable2,
1529 bank->base + bank->regs->irqenable2);
1531 #endif /* CONFIG_PM */
1533 #define omap_gpio_runtime_suspend NULL
1534 #define omap_gpio_runtime_resume NULL
1535 static inline void omap_gpio_init_context(struct gpio_bank *p) {}
1538 static const struct dev_pm_ops gpio_pm_ops = {
1539 SET_RUNTIME_PM_OPS(omap_gpio_runtime_suspend, omap_gpio_runtime_resume,
1543 #if defined(CONFIG_OF)
1544 static struct omap_gpio_reg_offs omap2_gpio_regs = {
1545 .revision = OMAP24XX_GPIO_REVISION,
1546 .direction = OMAP24XX_GPIO_OE,
1547 .datain = OMAP24XX_GPIO_DATAIN,
1548 .dataout = OMAP24XX_GPIO_DATAOUT,
1549 .set_dataout = OMAP24XX_GPIO_SETDATAOUT,
1550 .clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT,
1551 .irqstatus = OMAP24XX_GPIO_IRQSTATUS1,
1552 .irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2,
1553 .irqenable = OMAP24XX_GPIO_IRQENABLE1,
1554 .irqenable2 = OMAP24XX_GPIO_IRQENABLE2,
1555 .set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1,
1556 .clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1,
1557 .debounce = OMAP24XX_GPIO_DEBOUNCE_VAL,
1558 .debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN,
1559 .ctrl = OMAP24XX_GPIO_CTRL,
1560 .wkup_en = OMAP24XX_GPIO_WAKE_EN,
1561 .leveldetect0 = OMAP24XX_GPIO_LEVELDETECT0,
1562 .leveldetect1 = OMAP24XX_GPIO_LEVELDETECT1,
1563 .risingdetect = OMAP24XX_GPIO_RISINGDETECT,
1564 .fallingdetect = OMAP24XX_GPIO_FALLINGDETECT,
1567 static struct omap_gpio_reg_offs omap4_gpio_regs = {
1568 .revision = OMAP4_GPIO_REVISION,
1569 .direction = OMAP4_GPIO_OE,
1570 .datain = OMAP4_GPIO_DATAIN,
1571 .dataout = OMAP4_GPIO_DATAOUT,
1572 .set_dataout = OMAP4_GPIO_SETDATAOUT,
1573 .clr_dataout = OMAP4_GPIO_CLEARDATAOUT,
1574 .irqstatus = OMAP4_GPIO_IRQSTATUS0,
1575 .irqstatus2 = OMAP4_GPIO_IRQSTATUS1,
1576 .irqenable = OMAP4_GPIO_IRQSTATUSSET0,
1577 .irqenable2 = OMAP4_GPIO_IRQSTATUSSET1,
1578 .set_irqenable = OMAP4_GPIO_IRQSTATUSSET0,
1579 .clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0,
1580 .debounce = OMAP4_GPIO_DEBOUNCINGTIME,
1581 .debounce_en = OMAP4_GPIO_DEBOUNCENABLE,
1582 .ctrl = OMAP4_GPIO_CTRL,
1583 .wkup_en = OMAP4_GPIO_IRQWAKEN0,
1584 .leveldetect0 = OMAP4_GPIO_LEVELDETECT0,
1585 .leveldetect1 = OMAP4_GPIO_LEVELDETECT1,
1586 .risingdetect = OMAP4_GPIO_RISINGDETECT,
1587 .fallingdetect = OMAP4_GPIO_FALLINGDETECT,
1590 static const struct omap_gpio_platform_data omap2_pdata = {
1591 .regs = &omap2_gpio_regs,
1596 static const struct omap_gpio_platform_data omap3_pdata = {
1597 .regs = &omap2_gpio_regs,
1602 static const struct omap_gpio_platform_data omap4_pdata = {
1603 .regs = &omap4_gpio_regs,
1608 static const struct of_device_id omap_gpio_match[] = {
1610 .compatible = "ti,omap4-gpio",
1611 .data = &omap4_pdata,
1614 .compatible = "ti,omap3-gpio",
1615 .data = &omap3_pdata,
1618 .compatible = "ti,omap2-gpio",
1619 .data = &omap2_pdata,
1623 MODULE_DEVICE_TABLE(of, omap_gpio_match);
1626 static struct platform_driver omap_gpio_driver = {
1627 .probe = omap_gpio_probe,
1628 .remove = omap_gpio_remove,
1630 .name = "omap_gpio",
1632 .of_match_table = of_match_ptr(omap_gpio_match),
1637 * gpio driver register needs to be done before
1638 * machine_init functions access gpio APIs.
1639 * Hence omap_gpio_drv_reg() is a postcore_initcall.
1641 static int __init omap_gpio_drv_reg(void)
1643 return platform_driver_register(&omap_gpio_driver);
1645 postcore_initcall(omap_gpio_drv_reg);
1647 static void __exit omap_gpio_exit(void)
1649 platform_driver_unregister(&omap_gpio_driver);
1651 module_exit(omap_gpio_exit);
1653 MODULE_DESCRIPTION("omap gpio driver");
1654 MODULE_ALIAS("platform:gpio-omap");
1655 MODULE_LICENSE("GPL v2");