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/irqdomain.h>
28 #include <linux/irqchip/chained_irq.h>
29 #include <linux/gpio.h>
30 #include <linux/platform_data/gpio-omap.h>
34 static LIST_HEAD(omap_gpio_list
);
52 struct list_head node
;
55 struct irq_domain
*domain
;
57 u32 enabled_non_wakeup_gpios
;
58 struct gpio_regs context
;
63 struct gpio_chip chip
;
74 int context_loss_count
;
76 bool workaround_enabled
;
78 void (*set_dataout
)(struct gpio_bank
*bank
, int gpio
, int enable
);
79 int (*get_context_loss_count
)(struct device
*dev
);
81 struct omap_gpio_reg_offs
*regs
;
84 #define GPIO_INDEX(bank, gpio) (gpio % bank->width)
85 #define GPIO_BIT(bank, gpio) (1 << GPIO_INDEX(bank, gpio))
86 #define GPIO_MOD_CTRL_BIT BIT(0)
88 static int irq_to_gpio(struct gpio_bank
*bank
, unsigned int gpio_irq
)
90 return bank
->chip
.base
+ gpio_irq
;
93 static int omap_gpio_to_irq(struct gpio_chip
*chip
, unsigned offset
)
95 struct gpio_bank
*bank
= container_of(chip
, struct gpio_bank
, chip
);
97 return irq_find_mapping(bank
->domain
, offset
);
100 static void _set_gpio_direction(struct gpio_bank
*bank
, int gpio
, int is_input
)
102 void __iomem
*reg
= bank
->base
;
105 reg
+= bank
->regs
->direction
;
106 l
= __raw_readl(reg
);
111 __raw_writel(l
, reg
);
112 bank
->context
.oe
= l
;
116 /* set data out value using dedicate set/clear register */
117 static void _set_gpio_dataout_reg(struct gpio_bank
*bank
, int gpio
, int enable
)
119 void __iomem
*reg
= bank
->base
;
120 u32 l
= GPIO_BIT(bank
, gpio
);
123 reg
+= bank
->regs
->set_dataout
;
124 bank
->context
.dataout
|= l
;
126 reg
+= bank
->regs
->clr_dataout
;
127 bank
->context
.dataout
&= ~l
;
130 __raw_writel(l
, reg
);
133 /* set data out value using mask register */
134 static void _set_gpio_dataout_mask(struct gpio_bank
*bank
, int gpio
, int enable
)
136 void __iomem
*reg
= bank
->base
+ bank
->regs
->dataout
;
137 u32 gpio_bit
= GPIO_BIT(bank
, gpio
);
140 l
= __raw_readl(reg
);
145 __raw_writel(l
, reg
);
146 bank
->context
.dataout
= l
;
149 static int _get_gpio_datain(struct gpio_bank
*bank
, int offset
)
151 void __iomem
*reg
= bank
->base
+ bank
->regs
->datain
;
153 return (__raw_readl(reg
) & (1 << offset
)) != 0;
156 static int _get_gpio_dataout(struct gpio_bank
*bank
, int offset
)
158 void __iomem
*reg
= bank
->base
+ bank
->regs
->dataout
;
160 return (__raw_readl(reg
) & (1 << offset
)) != 0;
163 static inline void _gpio_rmw(void __iomem
*base
, u32 reg
, u32 mask
, bool set
)
165 int l
= __raw_readl(base
+ reg
);
172 __raw_writel(l
, base
+ reg
);
175 static inline void _gpio_dbck_enable(struct gpio_bank
*bank
)
177 if (bank
->dbck_enable_mask
&& !bank
->dbck_enabled
) {
178 clk_enable(bank
->dbck
);
179 bank
->dbck_enabled
= true;
181 __raw_writel(bank
->dbck_enable_mask
,
182 bank
->base
+ bank
->regs
->debounce_en
);
186 static inline void _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 __raw_writel(0, bank
->base
+ bank
->regs
->debounce_en
);
196 clk_disable(bank
->dbck
);
197 bank
->dbck_enabled
= false;
202 * _set_gpio_debounce - low level gpio debounce time
203 * @bank: the gpio bank we're acting upon
204 * @gpio: the gpio number on this @gpio
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 _set_gpio_debounce(struct gpio_bank
*bank
, unsigned gpio
,
217 if (!bank
->dbck_flag
)
222 else if (debounce
> 7936)
225 debounce
= (debounce
/ 0x1f) - 1;
227 l
= GPIO_BIT(bank
, gpio
);
229 clk_enable(bank
->dbck
);
230 reg
= bank
->base
+ bank
->regs
->debounce
;
231 __raw_writel(debounce
, reg
);
233 reg
= bank
->base
+ bank
->regs
->debounce_en
;
234 val
= __raw_readl(reg
);
240 bank
->dbck_enable_mask
= val
;
242 __raw_writel(val
, reg
);
243 clk_disable(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 _gpio_dbck_enable(bank
);
253 if (bank
->dbck_enable_mask
) {
254 bank
->context
.debounce
= debounce
;
255 bank
->context
.debounce_en
= val
;
260 * _clear_gpio_debounce - clear debounce settings for a gpio
261 * @bank: the gpio bank we're acting upon
262 * @gpio: the gpio number on this @gpio
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 _clear_gpio_debounce(struct gpio_bank
*bank
, unsigned gpio
)
271 u32 gpio_bit
= GPIO_BIT(bank
, gpio
);
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 __raw_writel(bank
->context
.debounce_en
,
282 bank
->base
+ bank
->regs
->debounce_en
);
284 if (!bank
->dbck_enable_mask
) {
285 bank
->context
.debounce
= 0;
286 __raw_writel(bank
->context
.debounce
, bank
->base
+
287 bank
->regs
->debounce
);
288 clk_disable(bank
->dbck
);
289 bank
->dbck_enabled
= false;
293 static inline void set_gpio_trigger(struct gpio_bank
*bank
, int gpio
,
296 void __iomem
*base
= bank
->base
;
297 u32 gpio_bit
= 1 << gpio
;
299 _gpio_rmw(base
, bank
->regs
->leveldetect0
, gpio_bit
,
300 trigger
& IRQ_TYPE_LEVEL_LOW
);
301 _gpio_rmw(base
, bank
->regs
->leveldetect1
, gpio_bit
,
302 trigger
& IRQ_TYPE_LEVEL_HIGH
);
303 _gpio_rmw(base
, bank
->regs
->risingdetect
, gpio_bit
,
304 trigger
& IRQ_TYPE_EDGE_RISING
);
305 _gpio_rmw(base
, bank
->regs
->fallingdetect
, gpio_bit
,
306 trigger
& IRQ_TYPE_EDGE_FALLING
);
308 bank
->context
.leveldetect0
=
309 __raw_readl(bank
->base
+ bank
->regs
->leveldetect0
);
310 bank
->context
.leveldetect1
=
311 __raw_readl(bank
->base
+ bank
->regs
->leveldetect1
);
312 bank
->context
.risingdetect
=
313 __raw_readl(bank
->base
+ bank
->regs
->risingdetect
);
314 bank
->context
.fallingdetect
=
315 __raw_readl(bank
->base
+ bank
->regs
->fallingdetect
);
317 if (likely(!(bank
->non_wakeup_gpios
& gpio_bit
))) {
318 _gpio_rmw(base
, bank
->regs
->wkup_en
, gpio_bit
, trigger
!= 0);
319 bank
->context
.wake_en
=
320 __raw_readl(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 __raw_readl(bank
->base
+ bank
->regs
->leveldetect0
) |
346 __raw_readl(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 _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
= __raw_readl(reg
);
370 __raw_writel(l
, reg
);
373 static void _toggle_gpio_edge_triggering(struct gpio_bank
*bank
, int gpio
) {}
376 static int _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 set_gpio_trigger(bank
, gpio
, trigger
);
385 } else if (bank
->regs
->irqctrl
) {
386 reg
+= bank
->regs
->irqctrl
;
388 l
= __raw_readl(reg
);
389 if ((trigger
& IRQ_TYPE_SENSE_MASK
) == IRQ_TYPE_EDGE_BOTH
)
390 bank
->toggle_mask
|= 1 << gpio
;
391 if (trigger
& IRQ_TYPE_EDGE_RISING
)
393 else if (trigger
& IRQ_TYPE_EDGE_FALLING
)
398 __raw_writel(l
, reg
);
399 } else if (bank
->regs
->edgectrl1
) {
401 reg
+= bank
->regs
->edgectrl2
;
403 reg
+= bank
->regs
->edgectrl1
;
406 l
= __raw_readl(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
)
411 l
|= 1 << (gpio
<< 1);
413 /* Enable wake-up during idle for dynamic tick */
414 _gpio_rmw(base
, bank
->regs
->wkup_en
, 1 << gpio
, trigger
);
415 bank
->context
.wake_en
=
416 __raw_readl(bank
->base
+ bank
->regs
->wkup_en
);
417 __raw_writel(l
, reg
);
422 static int gpio_irq_type(struct irq_data
*d
, unsigned type
)
424 struct gpio_bank
*bank
= irq_data_get_irq_chip_data(d
);
429 if (WARN_ON(!bank
->mod_usage
))
432 #ifdef CONFIG_ARCH_OMAP1
433 if (d
->irq
> IH_MPUIO_BASE
)
434 gpio
= OMAP_MPUIO(d
->irq
- IH_MPUIO_BASE
);
438 gpio
= irq_to_gpio(bank
, d
->hwirq
);
440 if (type
& ~IRQ_TYPE_SENSE_MASK
)
443 if (!bank
->regs
->leveldetect0
&&
444 (type
& (IRQ_TYPE_LEVEL_LOW
|IRQ_TYPE_LEVEL_HIGH
)))
447 spin_lock_irqsave(&bank
->lock
, flags
);
448 retval
= _set_gpio_triggering(bank
, GPIO_INDEX(bank
, gpio
), type
);
449 spin_unlock_irqrestore(&bank
->lock
, flags
);
451 if (type
& (IRQ_TYPE_LEVEL_LOW
| IRQ_TYPE_LEVEL_HIGH
))
452 __irq_set_handler_locked(d
->irq
, handle_level_irq
);
453 else if (type
& (IRQ_TYPE_EDGE_FALLING
| IRQ_TYPE_EDGE_RISING
))
454 __irq_set_handler_locked(d
->irq
, handle_edge_irq
);
459 static void _clear_gpio_irqbank(struct gpio_bank
*bank
, int gpio_mask
)
461 void __iomem
*reg
= bank
->base
;
463 reg
+= bank
->regs
->irqstatus
;
464 __raw_writel(gpio_mask
, reg
);
466 /* Workaround for clearing DSP GPIO interrupts to allow retention */
467 if (bank
->regs
->irqstatus2
) {
468 reg
= bank
->base
+ bank
->regs
->irqstatus2
;
469 __raw_writel(gpio_mask
, reg
);
472 /* Flush posted write for the irq status to avoid spurious interrupts */
476 static inline void _clear_gpio_irqstatus(struct gpio_bank
*bank
, int gpio
)
478 _clear_gpio_irqbank(bank
, GPIO_BIT(bank
, gpio
));
481 static u32
_get_gpio_irqbank_mask(struct gpio_bank
*bank
)
483 void __iomem
*reg
= bank
->base
;
485 u32 mask
= (1 << bank
->width
) - 1;
487 reg
+= bank
->regs
->irqenable
;
488 l
= __raw_readl(reg
);
489 if (bank
->regs
->irqenable_inv
)
495 static void _enable_gpio_irqbank(struct gpio_bank
*bank
, int gpio_mask
)
497 void __iomem
*reg
= bank
->base
;
500 if (bank
->regs
->set_irqenable
) {
501 reg
+= bank
->regs
->set_irqenable
;
503 bank
->context
.irqenable1
|= gpio_mask
;
505 reg
+= bank
->regs
->irqenable
;
506 l
= __raw_readl(reg
);
507 if (bank
->regs
->irqenable_inv
)
511 bank
->context
.irqenable1
= l
;
514 __raw_writel(l
, reg
);
517 static void _disable_gpio_irqbank(struct gpio_bank
*bank
, int gpio_mask
)
519 void __iomem
*reg
= bank
->base
;
522 if (bank
->regs
->clr_irqenable
) {
523 reg
+= bank
->regs
->clr_irqenable
;
525 bank
->context
.irqenable1
&= ~gpio_mask
;
527 reg
+= bank
->regs
->irqenable
;
528 l
= __raw_readl(reg
);
529 if (bank
->regs
->irqenable_inv
)
533 bank
->context
.irqenable1
= l
;
536 __raw_writel(l
, reg
);
539 static inline void _set_gpio_irqenable(struct gpio_bank
*bank
, int gpio
, int enable
)
542 _enable_gpio_irqbank(bank
, GPIO_BIT(bank
, gpio
));
544 _disable_gpio_irqbank(bank
, GPIO_BIT(bank
, gpio
));
548 * Note that ENAWAKEUP needs to be enabled in GPIO_SYSCONFIG register.
549 * 1510 does not seem to have a wake-up register. If JTAG is connected
550 * to the target, system will wake up always on GPIO events. While
551 * system is running all registered GPIO interrupts need to have wake-up
552 * enabled. When system is suspended, only selected GPIO interrupts need
553 * to have wake-up enabled.
555 static int _set_gpio_wakeup(struct gpio_bank
*bank
, int gpio
, int enable
)
557 u32 gpio_bit
= GPIO_BIT(bank
, gpio
);
560 if (bank
->non_wakeup_gpios
& gpio_bit
) {
562 "Unable to modify wakeup on non-wakeup GPIO%d\n", gpio
);
566 spin_lock_irqsave(&bank
->lock
, flags
);
568 bank
->context
.wake_en
|= gpio_bit
;
570 bank
->context
.wake_en
&= ~gpio_bit
;
572 __raw_writel(bank
->context
.wake_en
, bank
->base
+ bank
->regs
->wkup_en
);
573 spin_unlock_irqrestore(&bank
->lock
, flags
);
578 static void _reset_gpio(struct gpio_bank
*bank
, int gpio
)
580 _set_gpio_direction(bank
, GPIO_INDEX(bank
, gpio
), 1);
581 _set_gpio_irqenable(bank
, gpio
, 0);
582 _clear_gpio_irqstatus(bank
, gpio
);
583 _set_gpio_triggering(bank
, GPIO_INDEX(bank
, gpio
), IRQ_TYPE_NONE
);
584 _clear_gpio_debounce(bank
, gpio
);
587 /* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
588 static int gpio_wake_enable(struct irq_data
*d
, unsigned int enable
)
590 struct gpio_bank
*bank
= irq_data_get_irq_chip_data(d
);
591 unsigned int gpio
= irq_to_gpio(bank
, d
->hwirq
);
593 return _set_gpio_wakeup(bank
, gpio
, enable
);
596 static int omap_gpio_request(struct gpio_chip
*chip
, unsigned offset
)
598 struct gpio_bank
*bank
= container_of(chip
, struct gpio_bank
, chip
);
602 * If this is the first gpio_request for the bank,
603 * enable the bank module.
605 if (!bank
->mod_usage
)
606 pm_runtime_get_sync(bank
->dev
);
608 spin_lock_irqsave(&bank
->lock
, flags
);
609 /* Set trigger to none. You need to enable the desired trigger with
610 * request_irq() or set_irq_type().
612 _set_gpio_triggering(bank
, offset
, IRQ_TYPE_NONE
);
614 if (bank
->regs
->pinctrl
) {
615 void __iomem
*reg
= bank
->base
+ bank
->regs
->pinctrl
;
617 /* Claim the pin for MPU */
618 __raw_writel(__raw_readl(reg
) | (1 << offset
), reg
);
621 if (bank
->regs
->ctrl
&& !bank
->mod_usage
) {
622 void __iomem
*reg
= bank
->base
+ bank
->regs
->ctrl
;
625 ctrl
= __raw_readl(reg
);
626 /* Module is enabled, clocks are not gated */
627 ctrl
&= ~GPIO_MOD_CTRL_BIT
;
628 __raw_writel(ctrl
, reg
);
629 bank
->context
.ctrl
= ctrl
;
632 bank
->mod_usage
|= 1 << offset
;
634 spin_unlock_irqrestore(&bank
->lock
, flags
);
639 static void omap_gpio_free(struct gpio_chip
*chip
, unsigned offset
)
641 struct gpio_bank
*bank
= container_of(chip
, struct gpio_bank
, chip
);
642 void __iomem
*base
= bank
->base
;
645 spin_lock_irqsave(&bank
->lock
, flags
);
647 if (bank
->regs
->wkup_en
) {
648 /* Disable wake-up during idle for dynamic tick */
649 _gpio_rmw(base
, bank
->regs
->wkup_en
, 1 << offset
, 0);
650 bank
->context
.wake_en
=
651 __raw_readl(bank
->base
+ bank
->regs
->wkup_en
);
654 bank
->mod_usage
&= ~(1 << offset
);
656 if (bank
->regs
->ctrl
&& !bank
->mod_usage
) {
657 void __iomem
*reg
= bank
->base
+ bank
->regs
->ctrl
;
660 ctrl
= __raw_readl(reg
);
661 /* Module is disabled, clocks are gated */
662 ctrl
|= GPIO_MOD_CTRL_BIT
;
663 __raw_writel(ctrl
, reg
);
664 bank
->context
.ctrl
= ctrl
;
667 _reset_gpio(bank
, bank
->chip
.base
+ offset
);
668 spin_unlock_irqrestore(&bank
->lock
, flags
);
671 * If this is the last gpio to be freed in the bank,
672 * disable the bank module.
674 if (!bank
->mod_usage
)
675 pm_runtime_put(bank
->dev
);
679 * We need to unmask the GPIO bank interrupt as soon as possible to
680 * avoid missing GPIO interrupts for other lines in the bank.
681 * Then we need to mask-read-clear-unmask the triggered GPIO lines
682 * in the bank to avoid missing nested interrupts for a GPIO line.
683 * If we wait to unmask individual GPIO lines in the bank after the
684 * line's interrupt handler has been run, we may miss some nested
687 static void gpio_irq_handler(unsigned int irq
, struct irq_desc
*desc
)
689 void __iomem
*isr_reg
= NULL
;
692 struct gpio_bank
*bank
;
694 struct irq_chip
*chip
= irq_desc_get_chip(desc
);
696 chained_irq_enter(chip
, desc
);
698 bank
= irq_get_handler_data(irq
);
699 isr_reg
= bank
->base
+ bank
->regs
->irqstatus
;
700 pm_runtime_get_sync(bank
->dev
);
702 if (WARN_ON(!isr_reg
))
706 u32 isr_saved
, level_mask
= 0;
709 enabled
= _get_gpio_irqbank_mask(bank
);
710 isr_saved
= isr
= __raw_readl(isr_reg
) & enabled
;
712 if (bank
->level_mask
)
713 level_mask
= bank
->level_mask
& enabled
;
715 /* clear edge sensitive interrupts before handler(s) are
716 called so that we don't miss any interrupt occurred while
718 _disable_gpio_irqbank(bank
, isr_saved
& ~level_mask
);
719 _clear_gpio_irqbank(bank
, isr_saved
& ~level_mask
);
720 _enable_gpio_irqbank(bank
, isr_saved
& ~level_mask
);
722 /* if there is only edge sensitive GPIO pin interrupts
723 configured, we could unmask GPIO bank interrupt immediately */
724 if (!level_mask
&& !unmasked
) {
726 chained_irq_exit(chip
, desc
);
737 * Some chips can't respond to both rising and falling
738 * at the same time. If this irq was requested with
739 * both flags, we need to flip the ICR data for the IRQ
740 * to respond to the IRQ for the opposite direction.
741 * This will be indicated in the bank toggle_mask.
743 if (bank
->toggle_mask
& (1 << bit
))
744 _toggle_gpio_edge_triggering(bank
, bit
);
746 generic_handle_irq(irq_find_mapping(bank
->domain
, bit
));
749 /* if bank has any level sensitive GPIO pin interrupt
750 configured, we must unmask the bank interrupt only after
751 handler(s) are executed in order to avoid spurious bank
755 chained_irq_exit(chip
, desc
);
756 pm_runtime_put(bank
->dev
);
759 static void gpio_irq_shutdown(struct irq_data
*d
)
761 struct gpio_bank
*bank
= irq_data_get_irq_chip_data(d
);
762 unsigned int gpio
= irq_to_gpio(bank
, d
->hwirq
);
765 spin_lock_irqsave(&bank
->lock
, flags
);
766 _reset_gpio(bank
, gpio
);
767 spin_unlock_irqrestore(&bank
->lock
, flags
);
770 static void gpio_ack_irq(struct irq_data
*d
)
772 struct gpio_bank
*bank
= irq_data_get_irq_chip_data(d
);
773 unsigned int gpio
= irq_to_gpio(bank
, d
->hwirq
);
775 _clear_gpio_irqstatus(bank
, gpio
);
778 static void gpio_mask_irq(struct irq_data
*d
)
780 struct gpio_bank
*bank
= irq_data_get_irq_chip_data(d
);
781 unsigned int gpio
= irq_to_gpio(bank
, d
->hwirq
);
784 spin_lock_irqsave(&bank
->lock
, flags
);
785 _set_gpio_irqenable(bank
, gpio
, 0);
786 _set_gpio_triggering(bank
, GPIO_INDEX(bank
, gpio
), IRQ_TYPE_NONE
);
787 spin_unlock_irqrestore(&bank
->lock
, flags
);
790 static void gpio_unmask_irq(struct irq_data
*d
)
792 struct gpio_bank
*bank
= irq_data_get_irq_chip_data(d
);
793 unsigned int gpio
= irq_to_gpio(bank
, d
->hwirq
);
794 unsigned int irq_mask
= GPIO_BIT(bank
, gpio
);
795 u32 trigger
= irqd_get_trigger_type(d
);
798 spin_lock_irqsave(&bank
->lock
, flags
);
800 _set_gpio_triggering(bank
, GPIO_INDEX(bank
, gpio
), trigger
);
802 /* For level-triggered GPIOs, the clearing must be done after
803 * the HW source is cleared, thus after the handler has run */
804 if (bank
->level_mask
& irq_mask
) {
805 _set_gpio_irqenable(bank
, gpio
, 0);
806 _clear_gpio_irqstatus(bank
, gpio
);
809 _set_gpio_irqenable(bank
, gpio
, 1);
810 spin_unlock_irqrestore(&bank
->lock
, flags
);
813 static struct irq_chip gpio_irq_chip
= {
815 .irq_shutdown
= gpio_irq_shutdown
,
816 .irq_ack
= gpio_ack_irq
,
817 .irq_mask
= gpio_mask_irq
,
818 .irq_unmask
= gpio_unmask_irq
,
819 .irq_set_type
= gpio_irq_type
,
820 .irq_set_wake
= gpio_wake_enable
,
823 /*---------------------------------------------------------------------*/
825 static int omap_mpuio_suspend_noirq(struct device
*dev
)
827 struct platform_device
*pdev
= to_platform_device(dev
);
828 struct gpio_bank
*bank
= platform_get_drvdata(pdev
);
829 void __iomem
*mask_reg
= bank
->base
+
830 OMAP_MPUIO_GPIO_MASKIT
/ bank
->stride
;
833 spin_lock_irqsave(&bank
->lock
, flags
);
834 __raw_writel(0xffff & ~bank
->context
.wake_en
, mask_reg
);
835 spin_unlock_irqrestore(&bank
->lock
, flags
);
840 static int omap_mpuio_resume_noirq(struct device
*dev
)
842 struct platform_device
*pdev
= to_platform_device(dev
);
843 struct gpio_bank
*bank
= platform_get_drvdata(pdev
);
844 void __iomem
*mask_reg
= bank
->base
+
845 OMAP_MPUIO_GPIO_MASKIT
/ bank
->stride
;
848 spin_lock_irqsave(&bank
->lock
, flags
);
849 __raw_writel(bank
->context
.wake_en
, mask_reg
);
850 spin_unlock_irqrestore(&bank
->lock
, flags
);
855 static const struct dev_pm_ops omap_mpuio_dev_pm_ops
= {
856 .suspend_noirq
= omap_mpuio_suspend_noirq
,
857 .resume_noirq
= omap_mpuio_resume_noirq
,
860 /* use platform_driver for this. */
861 static struct platform_driver omap_mpuio_driver
= {
864 .pm
= &omap_mpuio_dev_pm_ops
,
868 static struct platform_device omap_mpuio_device
= {
872 .driver
= &omap_mpuio_driver
.driver
,
874 /* could list the /proc/iomem resources */
877 static inline void mpuio_init(struct gpio_bank
*bank
)
879 platform_set_drvdata(&omap_mpuio_device
, bank
);
881 if (platform_driver_register(&omap_mpuio_driver
) == 0)
882 (void) platform_device_register(&omap_mpuio_device
);
885 /*---------------------------------------------------------------------*/
887 static int gpio_input(struct gpio_chip
*chip
, unsigned offset
)
889 struct gpio_bank
*bank
;
892 bank
= container_of(chip
, struct gpio_bank
, chip
);
893 spin_lock_irqsave(&bank
->lock
, flags
);
894 _set_gpio_direction(bank
, offset
, 1);
895 spin_unlock_irqrestore(&bank
->lock
, flags
);
899 static int gpio_is_input(struct gpio_bank
*bank
, int mask
)
901 void __iomem
*reg
= bank
->base
+ bank
->regs
->direction
;
903 return __raw_readl(reg
) & mask
;
906 static int gpio_get(struct gpio_chip
*chip
, unsigned offset
)
908 struct gpio_bank
*bank
;
911 bank
= container_of(chip
, struct gpio_bank
, chip
);
912 mask
= (1 << offset
);
914 if (gpio_is_input(bank
, mask
))
915 return _get_gpio_datain(bank
, offset
);
917 return _get_gpio_dataout(bank
, offset
);
920 static int gpio_output(struct gpio_chip
*chip
, unsigned offset
, int value
)
922 struct gpio_bank
*bank
;
925 bank
= container_of(chip
, struct gpio_bank
, chip
);
926 spin_lock_irqsave(&bank
->lock
, flags
);
927 bank
->set_dataout(bank
, offset
, value
);
928 _set_gpio_direction(bank
, offset
, 0);
929 spin_unlock_irqrestore(&bank
->lock
, flags
);
933 static int gpio_debounce(struct gpio_chip
*chip
, unsigned offset
,
936 struct gpio_bank
*bank
;
939 bank
= container_of(chip
, struct gpio_bank
, chip
);
941 spin_lock_irqsave(&bank
->lock
, flags
);
942 _set_gpio_debounce(bank
, offset
, debounce
);
943 spin_unlock_irqrestore(&bank
->lock
, flags
);
948 static void gpio_set(struct gpio_chip
*chip
, unsigned offset
, int value
)
950 struct gpio_bank
*bank
;
953 bank
= container_of(chip
, struct gpio_bank
, chip
);
954 spin_lock_irqsave(&bank
->lock
, flags
);
955 bank
->set_dataout(bank
, offset
, value
);
956 spin_unlock_irqrestore(&bank
->lock
, flags
);
959 /*---------------------------------------------------------------------*/
961 static void __init
omap_gpio_show_rev(struct gpio_bank
*bank
)
966 if (called
|| bank
->regs
->revision
== USHRT_MAX
)
969 rev
= __raw_readw(bank
->base
+ bank
->regs
->revision
);
970 pr_info("OMAP GPIO hardware version %d.%d\n",
971 (rev
>> 4) & 0x0f, rev
& 0x0f);
976 /* This lock class tells lockdep that GPIO irqs are in a different
977 * category than their parents, so it won't report false recursion.
979 static struct lock_class_key gpio_lock_class
;
981 static void omap_gpio_mod_init(struct gpio_bank
*bank
)
983 void __iomem
*base
= bank
->base
;
986 if (bank
->width
== 16)
989 if (bank
->is_mpuio
) {
990 __raw_writel(l
, bank
->base
+ bank
->regs
->irqenable
);
994 _gpio_rmw(base
, bank
->regs
->irqenable
, l
, bank
->regs
->irqenable_inv
);
995 _gpio_rmw(base
, bank
->regs
->irqstatus
, l
, !bank
->regs
->irqenable_inv
);
996 if (bank
->regs
->debounce_en
)
997 __raw_writel(0, base
+ bank
->regs
->debounce_en
);
999 /* Save OE default value (0xffffffff) in the context */
1000 bank
->context
.oe
= __raw_readl(bank
->base
+ bank
->regs
->direction
);
1001 /* Initialize interface clk ungated, module enabled */
1002 if (bank
->regs
->ctrl
)
1003 __raw_writel(0, base
+ bank
->regs
->ctrl
);
1005 bank
->dbck
= clk_get(bank
->dev
, "dbclk");
1006 if (IS_ERR(bank
->dbck
))
1007 dev_err(bank
->dev
, "Could not get gpio dbck\n");
1011 omap_mpuio_alloc_gc(struct gpio_bank
*bank
, unsigned int irq_start
,
1014 struct irq_chip_generic
*gc
;
1015 struct irq_chip_type
*ct
;
1017 gc
= irq_alloc_generic_chip("MPUIO", 1, irq_start
, bank
->base
,
1020 dev_err(bank
->dev
, "Memory alloc failed for gc\n");
1024 ct
= gc
->chip_types
;
1026 /* NOTE: No ack required, reading IRQ status clears it. */
1027 ct
->chip
.irq_mask
= irq_gc_mask_set_bit
;
1028 ct
->chip
.irq_unmask
= irq_gc_mask_clr_bit
;
1029 ct
->chip
.irq_set_type
= gpio_irq_type
;
1031 if (bank
->regs
->wkup_en
)
1032 ct
->chip
.irq_set_wake
= gpio_wake_enable
,
1034 ct
->regs
.mask
= OMAP_MPUIO_GPIO_INT
/ bank
->stride
;
1035 irq_setup_generic_chip(gc
, IRQ_MSK(num
), IRQ_GC_INIT_MASK_CACHE
,
1036 IRQ_NOREQUEST
| IRQ_NOPROBE
, 0);
1039 static void omap_gpio_chip_init(struct gpio_bank
*bank
)
1045 * REVISIT eventually switch from OMAP-specific gpio structs
1046 * over to the generic ones
1048 bank
->chip
.request
= omap_gpio_request
;
1049 bank
->chip
.free
= omap_gpio_free
;
1050 bank
->chip
.direction_input
= gpio_input
;
1051 bank
->chip
.get
= gpio_get
;
1052 bank
->chip
.direction_output
= gpio_output
;
1053 bank
->chip
.set_debounce
= gpio_debounce
;
1054 bank
->chip
.set
= gpio_set
;
1055 bank
->chip
.to_irq
= omap_gpio_to_irq
;
1056 if (bank
->is_mpuio
) {
1057 bank
->chip
.label
= "mpuio";
1058 if (bank
->regs
->wkup_en
)
1059 bank
->chip
.dev
= &omap_mpuio_device
.dev
;
1060 bank
->chip
.base
= OMAP_MPUIO(0);
1062 bank
->chip
.label
= "gpio";
1063 bank
->chip
.base
= gpio
;
1064 gpio
+= bank
->width
;
1066 bank
->chip
.ngpio
= bank
->width
;
1068 gpiochip_add(&bank
->chip
);
1070 for (j
= 0; j
< bank
->width
; j
++) {
1071 int irq
= irq_create_mapping(bank
->domain
, j
);
1072 irq_set_lockdep_class(irq
, &gpio_lock_class
);
1073 irq_set_chip_data(irq
, bank
);
1074 if (bank
->is_mpuio
) {
1075 omap_mpuio_alloc_gc(bank
, irq
, bank
->width
);
1077 irq_set_chip_and_handler(irq
, &gpio_irq_chip
,
1079 set_irq_flags(irq
, IRQF_VALID
);
1082 irq_set_chained_handler(bank
->irq
, gpio_irq_handler
);
1083 irq_set_handler_data(bank
->irq
, bank
);
1086 static const struct of_device_id omap_gpio_match
[];
1088 static int omap_gpio_probe(struct platform_device
*pdev
)
1090 struct device
*dev
= &pdev
->dev
;
1091 struct device_node
*node
= dev
->of_node
;
1092 const struct of_device_id
*match
;
1093 const struct omap_gpio_platform_data
*pdata
;
1094 struct resource
*res
;
1095 struct gpio_bank
*bank
;
1097 match
= of_match_device(of_match_ptr(omap_gpio_match
), dev
);
1099 pdata
= match
? match
->data
: dev
->platform_data
;
1103 bank
= devm_kzalloc(dev
, sizeof(struct gpio_bank
), GFP_KERNEL
);
1105 dev_err(dev
, "Memory alloc failed\n");
1109 res
= platform_get_resource(pdev
, IORESOURCE_IRQ
, 0);
1110 if (unlikely(!res
)) {
1111 dev_err(dev
, "Invalid IRQ resource\n");
1115 bank
->irq
= res
->start
;
1117 bank
->dbck_flag
= pdata
->dbck_flag
;
1118 bank
->stride
= pdata
->bank_stride
;
1119 bank
->width
= pdata
->bank_width
;
1120 bank
->is_mpuio
= pdata
->is_mpuio
;
1121 bank
->non_wakeup_gpios
= pdata
->non_wakeup_gpios
;
1122 bank
->regs
= pdata
->regs
;
1123 #ifdef CONFIG_OF_GPIO
1124 bank
->chip
.of_node
= of_node_get(node
);
1127 if (!of_property_read_bool(node
, "ti,gpio-always-on"))
1128 bank
->loses_context
= true;
1130 bank
->loses_context
= pdata
->loses_context
;
1134 bank
->domain
= irq_domain_add_linear(node
, bank
->width
,
1135 &irq_domain_simple_ops
, NULL
);
1139 if (bank
->regs
->set_dataout
&& bank
->regs
->clr_dataout
)
1140 bank
->set_dataout
= _set_gpio_dataout_reg
;
1142 bank
->set_dataout
= _set_gpio_dataout_mask
;
1144 spin_lock_init(&bank
->lock
);
1146 /* Static mapping, never released */
1147 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1148 if (unlikely(!res
)) {
1149 dev_err(dev
, "Invalid mem resource\n");
1150 irq_domain_remove(bank
->domain
);
1154 if (!devm_request_mem_region(dev
, res
->start
, resource_size(res
),
1156 dev_err(dev
, "Region already claimed\n");
1157 irq_domain_remove(bank
->domain
);
1161 bank
->base
= devm_ioremap(dev
, res
->start
, resource_size(res
));
1163 dev_err(dev
, "Could not ioremap\n");
1164 irq_domain_remove(bank
->domain
);
1168 platform_set_drvdata(pdev
, bank
);
1170 pm_runtime_enable(bank
->dev
);
1171 pm_runtime_irq_safe(bank
->dev
);
1172 pm_runtime_get_sync(bank
->dev
);
1177 omap_gpio_mod_init(bank
);
1178 omap_gpio_chip_init(bank
);
1179 omap_gpio_show_rev(bank
);
1181 if (bank
->loses_context
)
1182 bank
->get_context_loss_count
= pdata
->get_context_loss_count
;
1184 pm_runtime_put(bank
->dev
);
1186 list_add_tail(&bank
->node
, &omap_gpio_list
);
1191 #ifdef CONFIG_ARCH_OMAP2PLUS
1193 #if defined(CONFIG_PM_RUNTIME)
1194 static void omap_gpio_restore_context(struct gpio_bank
*bank
);
1196 static int omap_gpio_runtime_suspend(struct device
*dev
)
1198 struct platform_device
*pdev
= to_platform_device(dev
);
1199 struct gpio_bank
*bank
= platform_get_drvdata(pdev
);
1201 unsigned long flags
;
1202 u32 wake_low
, wake_hi
;
1204 spin_lock_irqsave(&bank
->lock
, flags
);
1207 * Only edges can generate a wakeup event to the PRCM.
1209 * Therefore, ensure any wake-up capable GPIOs have
1210 * edge-detection enabled before going idle to ensure a wakeup
1211 * to the PRCM is generated on a GPIO transition. (c.f. 34xx
1214 * The normal values will be restored upon ->runtime_resume()
1215 * by writing back the values saved in bank->context.
1217 wake_low
= bank
->context
.leveldetect0
& bank
->context
.wake_en
;
1219 __raw_writel(wake_low
| bank
->context
.fallingdetect
,
1220 bank
->base
+ bank
->regs
->fallingdetect
);
1221 wake_hi
= bank
->context
.leveldetect1
& bank
->context
.wake_en
;
1223 __raw_writel(wake_hi
| bank
->context
.risingdetect
,
1224 bank
->base
+ bank
->regs
->risingdetect
);
1226 if (!bank
->enabled_non_wakeup_gpios
)
1227 goto update_gpio_context_count
;
1229 if (bank
->power_mode
!= OFF_MODE
) {
1230 bank
->power_mode
= 0;
1231 goto update_gpio_context_count
;
1234 * If going to OFF, remove triggering for all
1235 * non-wakeup GPIOs. Otherwise spurious IRQs will be
1236 * generated. See OMAP2420 Errata item 1.101.
1238 bank
->saved_datain
= __raw_readl(bank
->base
+
1239 bank
->regs
->datain
);
1240 l1
= bank
->context
.fallingdetect
;
1241 l2
= bank
->context
.risingdetect
;
1243 l1
&= ~bank
->enabled_non_wakeup_gpios
;
1244 l2
&= ~bank
->enabled_non_wakeup_gpios
;
1246 __raw_writel(l1
, bank
->base
+ bank
->regs
->fallingdetect
);
1247 __raw_writel(l2
, bank
->base
+ bank
->regs
->risingdetect
);
1249 bank
->workaround_enabled
= true;
1251 update_gpio_context_count
:
1252 if (bank
->get_context_loss_count
)
1253 bank
->context_loss_count
=
1254 bank
->get_context_loss_count(bank
->dev
);
1256 _gpio_dbck_disable(bank
);
1257 spin_unlock_irqrestore(&bank
->lock
, flags
);
1262 static int omap_gpio_runtime_resume(struct device
*dev
)
1264 struct platform_device
*pdev
= to_platform_device(dev
);
1265 struct gpio_bank
*bank
= platform_get_drvdata(pdev
);
1266 u32 l
= 0, gen
, gen0
, gen1
;
1267 unsigned long flags
;
1270 spin_lock_irqsave(&bank
->lock
, flags
);
1271 _gpio_dbck_enable(bank
);
1274 * In ->runtime_suspend(), level-triggered, wakeup-enabled
1275 * GPIOs were set to edge trigger also in order to be able to
1276 * generate a PRCM wakeup. Here we restore the
1277 * pre-runtime_suspend() values for edge triggering.
1279 __raw_writel(bank
->context
.fallingdetect
,
1280 bank
->base
+ bank
->regs
->fallingdetect
);
1281 __raw_writel(bank
->context
.risingdetect
,
1282 bank
->base
+ bank
->regs
->risingdetect
);
1284 if (bank
->loses_context
) {
1285 if (!bank
->get_context_loss_count
) {
1286 omap_gpio_restore_context(bank
);
1288 c
= bank
->get_context_loss_count(bank
->dev
);
1289 if (c
!= bank
->context_loss_count
) {
1290 omap_gpio_restore_context(bank
);
1292 spin_unlock_irqrestore(&bank
->lock
, flags
);
1298 if (!bank
->workaround_enabled
) {
1299 spin_unlock_irqrestore(&bank
->lock
, flags
);
1303 l
= __raw_readl(bank
->base
+ bank
->regs
->datain
);
1306 * Check if any of the non-wakeup interrupt GPIOs have changed
1307 * state. If so, generate an IRQ by software. This is
1308 * horribly racy, but it's the best we can do to work around
1311 l
^= bank
->saved_datain
;
1312 l
&= bank
->enabled_non_wakeup_gpios
;
1315 * No need to generate IRQs for the rising edge for gpio IRQs
1316 * configured with falling edge only; and vice versa.
1318 gen0
= l
& bank
->context
.fallingdetect
;
1319 gen0
&= bank
->saved_datain
;
1321 gen1
= l
& bank
->context
.risingdetect
;
1322 gen1
&= ~(bank
->saved_datain
);
1324 /* FIXME: Consider GPIO IRQs with level detections properly! */
1325 gen
= l
& (~(bank
->context
.fallingdetect
) &
1326 ~(bank
->context
.risingdetect
));
1327 /* Consider all GPIO IRQs needed to be updated */
1333 old0
= __raw_readl(bank
->base
+ bank
->regs
->leveldetect0
);
1334 old1
= __raw_readl(bank
->base
+ bank
->regs
->leveldetect1
);
1336 if (!bank
->regs
->irqstatus_raw0
) {
1337 __raw_writel(old0
| gen
, bank
->base
+
1338 bank
->regs
->leveldetect0
);
1339 __raw_writel(old1
| gen
, bank
->base
+
1340 bank
->regs
->leveldetect1
);
1343 if (bank
->regs
->irqstatus_raw0
) {
1344 __raw_writel(old0
| l
, bank
->base
+
1345 bank
->regs
->leveldetect0
);
1346 __raw_writel(old1
| l
, bank
->base
+
1347 bank
->regs
->leveldetect1
);
1349 __raw_writel(old0
, bank
->base
+ bank
->regs
->leveldetect0
);
1350 __raw_writel(old1
, bank
->base
+ bank
->regs
->leveldetect1
);
1353 bank
->workaround_enabled
= false;
1354 spin_unlock_irqrestore(&bank
->lock
, flags
);
1358 #endif /* CONFIG_PM_RUNTIME */
1360 void omap2_gpio_prepare_for_idle(int pwr_mode
)
1362 struct gpio_bank
*bank
;
1364 list_for_each_entry(bank
, &omap_gpio_list
, node
) {
1365 if (!bank
->mod_usage
|| !bank
->loses_context
)
1368 bank
->power_mode
= pwr_mode
;
1370 pm_runtime_put_sync_suspend(bank
->dev
);
1374 void omap2_gpio_resume_after_idle(void)
1376 struct gpio_bank
*bank
;
1378 list_for_each_entry(bank
, &omap_gpio_list
, node
) {
1379 if (!bank
->mod_usage
|| !bank
->loses_context
)
1382 pm_runtime_get_sync(bank
->dev
);
1386 #if defined(CONFIG_PM_RUNTIME)
1387 static void omap_gpio_restore_context(struct gpio_bank
*bank
)
1389 __raw_writel(bank
->context
.wake_en
,
1390 bank
->base
+ bank
->regs
->wkup_en
);
1391 __raw_writel(bank
->context
.ctrl
, bank
->base
+ bank
->regs
->ctrl
);
1392 __raw_writel(bank
->context
.leveldetect0
,
1393 bank
->base
+ bank
->regs
->leveldetect0
);
1394 __raw_writel(bank
->context
.leveldetect1
,
1395 bank
->base
+ bank
->regs
->leveldetect1
);
1396 __raw_writel(bank
->context
.risingdetect
,
1397 bank
->base
+ bank
->regs
->risingdetect
);
1398 __raw_writel(bank
->context
.fallingdetect
,
1399 bank
->base
+ bank
->regs
->fallingdetect
);
1400 if (bank
->regs
->set_dataout
&& bank
->regs
->clr_dataout
)
1401 __raw_writel(bank
->context
.dataout
,
1402 bank
->base
+ bank
->regs
->set_dataout
);
1404 __raw_writel(bank
->context
.dataout
,
1405 bank
->base
+ bank
->regs
->dataout
);
1406 __raw_writel(bank
->context
.oe
, bank
->base
+ bank
->regs
->direction
);
1408 if (bank
->dbck_enable_mask
) {
1409 __raw_writel(bank
->context
.debounce
, bank
->base
+
1410 bank
->regs
->debounce
);
1411 __raw_writel(bank
->context
.debounce_en
,
1412 bank
->base
+ bank
->regs
->debounce_en
);
1415 __raw_writel(bank
->context
.irqenable1
,
1416 bank
->base
+ bank
->regs
->irqenable
);
1417 __raw_writel(bank
->context
.irqenable2
,
1418 bank
->base
+ bank
->regs
->irqenable2
);
1420 #endif /* CONFIG_PM_RUNTIME */
1422 #define omap_gpio_runtime_suspend NULL
1423 #define omap_gpio_runtime_resume NULL
1426 static const struct dev_pm_ops gpio_pm_ops
= {
1427 SET_RUNTIME_PM_OPS(omap_gpio_runtime_suspend
, omap_gpio_runtime_resume
,
1431 #if defined(CONFIG_OF)
1432 static struct omap_gpio_reg_offs omap2_gpio_regs
= {
1433 .revision
= OMAP24XX_GPIO_REVISION
,
1434 .direction
= OMAP24XX_GPIO_OE
,
1435 .datain
= OMAP24XX_GPIO_DATAIN
,
1436 .dataout
= OMAP24XX_GPIO_DATAOUT
,
1437 .set_dataout
= OMAP24XX_GPIO_SETDATAOUT
,
1438 .clr_dataout
= OMAP24XX_GPIO_CLEARDATAOUT
,
1439 .irqstatus
= OMAP24XX_GPIO_IRQSTATUS1
,
1440 .irqstatus2
= OMAP24XX_GPIO_IRQSTATUS2
,
1441 .irqenable
= OMAP24XX_GPIO_IRQENABLE1
,
1442 .irqenable2
= OMAP24XX_GPIO_IRQENABLE2
,
1443 .set_irqenable
= OMAP24XX_GPIO_SETIRQENABLE1
,
1444 .clr_irqenable
= OMAP24XX_GPIO_CLEARIRQENABLE1
,
1445 .debounce
= OMAP24XX_GPIO_DEBOUNCE_VAL
,
1446 .debounce_en
= OMAP24XX_GPIO_DEBOUNCE_EN
,
1447 .ctrl
= OMAP24XX_GPIO_CTRL
,
1448 .wkup_en
= OMAP24XX_GPIO_WAKE_EN
,
1449 .leveldetect0
= OMAP24XX_GPIO_LEVELDETECT0
,
1450 .leveldetect1
= OMAP24XX_GPIO_LEVELDETECT1
,
1451 .risingdetect
= OMAP24XX_GPIO_RISINGDETECT
,
1452 .fallingdetect
= OMAP24XX_GPIO_FALLINGDETECT
,
1455 static struct omap_gpio_reg_offs omap4_gpio_regs
= {
1456 .revision
= OMAP4_GPIO_REVISION
,
1457 .direction
= OMAP4_GPIO_OE
,
1458 .datain
= OMAP4_GPIO_DATAIN
,
1459 .dataout
= OMAP4_GPIO_DATAOUT
,
1460 .set_dataout
= OMAP4_GPIO_SETDATAOUT
,
1461 .clr_dataout
= OMAP4_GPIO_CLEARDATAOUT
,
1462 .irqstatus
= OMAP4_GPIO_IRQSTATUS0
,
1463 .irqstatus2
= OMAP4_GPIO_IRQSTATUS1
,
1464 .irqenable
= OMAP4_GPIO_IRQSTATUSSET0
,
1465 .irqenable2
= OMAP4_GPIO_IRQSTATUSSET1
,
1466 .set_irqenable
= OMAP4_GPIO_IRQSTATUSSET0
,
1467 .clr_irqenable
= OMAP4_GPIO_IRQSTATUSCLR0
,
1468 .debounce
= OMAP4_GPIO_DEBOUNCINGTIME
,
1469 .debounce_en
= OMAP4_GPIO_DEBOUNCENABLE
,
1470 .ctrl
= OMAP4_GPIO_CTRL
,
1471 .wkup_en
= OMAP4_GPIO_IRQWAKEN0
,
1472 .leveldetect0
= OMAP4_GPIO_LEVELDETECT0
,
1473 .leveldetect1
= OMAP4_GPIO_LEVELDETECT1
,
1474 .risingdetect
= OMAP4_GPIO_RISINGDETECT
,
1475 .fallingdetect
= OMAP4_GPIO_FALLINGDETECT
,
1478 static const struct omap_gpio_platform_data omap2_pdata
= {
1479 .regs
= &omap2_gpio_regs
,
1484 static const struct omap_gpio_platform_data omap3_pdata
= {
1485 .regs
= &omap2_gpio_regs
,
1490 static const struct omap_gpio_platform_data omap4_pdata
= {
1491 .regs
= &omap4_gpio_regs
,
1496 static const struct of_device_id omap_gpio_match
[] = {
1498 .compatible
= "ti,omap4-gpio",
1499 .data
= &omap4_pdata
,
1502 .compatible
= "ti,omap3-gpio",
1503 .data
= &omap3_pdata
,
1506 .compatible
= "ti,omap2-gpio",
1507 .data
= &omap2_pdata
,
1511 MODULE_DEVICE_TABLE(of
, omap_gpio_match
);
1514 static struct platform_driver omap_gpio_driver
= {
1515 .probe
= omap_gpio_probe
,
1517 .name
= "omap_gpio",
1519 .of_match_table
= of_match_ptr(omap_gpio_match
),
1524 * gpio driver register needs to be done before
1525 * machine_init functions access gpio APIs.
1526 * Hence omap_gpio_drv_reg() is a postcore_initcall.
1528 static int __init
omap_gpio_drv_reg(void)
1530 return platform_driver_register(&omap_gpio_driver
);
1532 postcore_initcall(omap_gpio_drv_reg
);