[mirror_ubuntu-zesty-kernel.git] / arch / arm / mach-davinci / gpio.c

/*
 * TI DaVinci GPIO Support
 *
 * Copyright (c) 2006-2007 David Brownell
 * Copyright (c) 2007, MontaVista Software, Inc. <source@mvista.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/bitops.h>

#include <mach/cputype.h>
#include <mach/irqs.h>
#include <mach/hardware.h>
#include <mach/gpio.h>

#include <asm/mach/irq.h>


static DEFINE_SPINLOCK(gpio_lock);

struct davinci_gpio {
	struct gpio_chip	chip;
	struct gpio_controller	*__iomem regs;
};

static struct davinci_gpio chips[DIV_ROUND_UP(DAVINCI_N_GPIO, 32)];

static unsigned __initdata ngpio;

/* create a non-inlined version */
static struct gpio_controller __iomem * __init gpio2controller(unsigned gpio)
{
	return __gpio_to_controller(gpio);
}

static int __init davinci_gpio_irq_setup(void);

/*--------------------------------------------------------------------------*/

/*
 * board setup code *MUST* set PINMUX0 and PINMUX1 as
 * needed, and enable the GPIO clock.
 */

static int davinci_direction_in(struct gpio_chip *chip, unsigned offset)
{
	struct davinci_gpio *d = container_of(chip, struct davinci_gpio, chip);
	struct gpio_controller *__iomem g = d->regs;
	u32 temp;

	spin_lock(&gpio_lock);
	temp = __raw_readl(&g->dir);
	temp |= (1 << offset);
	__raw_writel(temp, &g->dir);
	spin_unlock(&gpio_lock);

	return 0;
}

/*
 * Read the pin's value (works even if it's set up as output);
 * returns zero/nonzero.
 *
 * Note that changes are synched to the GPIO clock, so reading values back
 * right after you've set them may give old values.
 */
static int davinci_gpio_get(struct gpio_chip *chip, unsigned offset)
{
	struct davinci_gpio *d = container_of(chip, struct davinci_gpio, chip);
	struct gpio_controller *__iomem g = d->regs;

	return (1 << offset) & __raw_readl(&g->in_data);
}

static int
davinci_direction_out(struct gpio_chip *chip, unsigned offset, int value)
{
	struct davinci_gpio *d = container_of(chip, struct davinci_gpio, chip);
	struct gpio_controller *__iomem g = d->regs;
	u32 temp;
	u32 mask = 1 << offset;

	spin_lock(&gpio_lock);
	temp = __raw_readl(&g->dir);
	temp &= ~mask;
	__raw_writel(mask, value ? &g->set_data : &g->clr_data);
	__raw_writel(temp, &g->dir);
	spin_unlock(&gpio_lock);
	return 0;
}

/*
 * Assuming the pin is muxed as a gpio output, set its output value.
 */
static void
davinci_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
	struct davinci_gpio *d = container_of(chip, struct davinci_gpio, chip);
	struct gpio_controller *__iomem g = d->regs;

	__raw_writel((1 << offset), value ? &g->set_data : &g->clr_data);
}

static int __init davinci_gpio_setup(void)
{
	int i, base;

	/* The gpio banks conceptually expose a segmented bitmap,
	 * and "ngpio" is one more than the largest zero-based
	 * bit index that's valid.
	 */
	if (cpu_is_davinci_dm355()) {		/* or dm335() */
		ngpio = 104;
	} else if (cpu_is_davinci_dm644x()) {	/* or dm337() */
		ngpio = 71;
	} else if (cpu_is_davinci_dm646x()) {
		/* NOTE:  each bank has several "reserved" bits,
		 * unusable as GPIOs.  Only 33 of the GPIO numbers
		 * are usable, and we're not rejecting the others.
		 */
		ngpio = 43;
	} else {
		/* if cpu_is_davinci_dm643x() ngpio = 111 */
		pr_err("GPIO setup:  how many GPIOs?\n");
		return -EINVAL;
	}

	if (WARN_ON(DAVINCI_N_GPIO < ngpio))
		ngpio = DAVINCI_N_GPIO;

	for (i = 0, base = 0; base < ngpio; i++, base += 32) {
		chips[i].chip.label = "DaVinci";

		chips[i].chip.direction_input = davinci_direction_in;
		chips[i].chip.get = davinci_gpio_get;
		chips[i].chip.direction_output = davinci_direction_out;
		chips[i].chip.set = davinci_gpio_set;

		chips[i].chip.base = base;
		chips[i].chip.ngpio = ngpio - base;
		if (chips[i].chip.ngpio > 32)
			chips[i].chip.ngpio = 32;

		chips[i].regs = gpio2controller(base);

		gpiochip_add(&chips[i].chip);
	}

	davinci_gpio_irq_setup();
	return 0;
}
pure_initcall(davinci_gpio_setup);

/*--------------------------------------------------------------------------*/
/*
 * We expect irqs will normally be set up as input pins, but they can also be
 * used as output pins ... which is convenient for testing.
 *
 * NOTE:  The first few GPIOs also have direct INTC hookups in addition
 * to their GPIOBNK0 irq, with a bit less overhead but less flexibility
 * on triggering (e.g. no edge options).  We don't try to use those.
 *
 * All those INTC hookups (direct, plus several IRQ banks) can also
 * serve as EDMA event triggers.
 */

static void gpio_irq_disable(unsigned irq)
{
	struct gpio_controller *__iomem g = get_irq_chip_data(irq);
	u32 mask = __gpio_mask(irq_to_gpio(irq));

	__raw_writel(mask, &g->clr_falling);
	__raw_writel(mask, &g->clr_rising);
}

static void gpio_irq_enable(unsigned irq)
{
	struct gpio_controller *__iomem g = get_irq_chip_data(irq);
	u32 mask = __gpio_mask(irq_to_gpio(irq));
	unsigned status = irq_desc[irq].status;

	status &= IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING;
	if (!status)
		status = IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING;

	if (status & IRQ_TYPE_EDGE_FALLING)
		__raw_writel(mask, &g->set_falling);
	if (status & IRQ_TYPE_EDGE_RISING)
		__raw_writel(mask, &g->set_rising);
}

static int gpio_irq_type(unsigned irq, unsigned trigger)
{
	struct gpio_controller *__iomem g = get_irq_chip_data(irq);
	u32 mask = __gpio_mask(irq_to_gpio(irq));

	if (trigger & ~(IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
		return -EINVAL;

	irq_desc[irq].status &= ~IRQ_TYPE_SENSE_MASK;
	irq_desc[irq].status |= trigger;

	/* don't enable the IRQ if it's currently disabled */
	if (irq_desc[irq].depth == 0) {
		__raw_writel(mask, (trigger & IRQ_TYPE_EDGE_FALLING)
			     ? &g->set_falling : &g->clr_falling);
		__raw_writel(mask, (trigger & IRQ_TYPE_EDGE_RISING)
			     ? &g->set_rising : &g->clr_rising);
	}
	return 0;
}

static struct irq_chip gpio_irqchip = {
	.name		= "GPIO",
	.enable		= gpio_irq_enable,
	.disable	= gpio_irq_disable,
	.set_type	= gpio_irq_type,
};

static void
gpio_irq_handler(unsigned irq, struct irq_desc *desc)
{
	struct gpio_controller *__iomem g = get_irq_chip_data(irq);
	u32 mask = 0xffff;

	/* we only care about one bank */
	if (irq & 1)
		mask <<= 16;

	/* temporarily mask (level sensitive) parent IRQ */
	desc->chip->mask(irq);
	desc->chip->ack(irq);
	while (1) {
		u32		status;
		int		n;
		int		res;

		/* ack any irqs */
		status = __raw_readl(&g->intstat) & mask;
		if (!status)
			break;
		__raw_writel(status, &g->intstat);
		if (irq & 1)
			status >>= 16;

		/* now demux them to the right lowlevel handler */
		n = (int)get_irq_data(irq);
		while (status) {
			res = ffs(status);
			n += res;
			generic_handle_irq(n - 1);
			status >>= res;
		}
	}
	desc->chip->unmask(irq);
	/* now it may re-trigger */
}

/*
 * NOTE:  for suspend/resume, probably best to make a platform_device with
 * suspend_late/resume_resume calls hooking into results of the set_wake()
 * calls ... so if no gpios are wakeup events the clock can be disabled,
 * with outputs left at previously set levels, and so that VDD3P3V.IOPWDN0
 * (dm6446) can be set appropriately for GPIOV33 pins.
 */

static int __init davinci_gpio_irq_setup(void)
{
	unsigned	gpio, irq, bank;
	unsigned	bank_irq;
	struct clk	*clk;
	u32		binten = 0;

	if (cpu_is_davinci_dm355()) {		/* or dm335() */
		bank_irq = IRQ_DM355_GPIOBNK0;
	} else if (cpu_is_davinci_dm644x()) {
		bank_irq = IRQ_GPIOBNK0;
	} else if (cpu_is_davinci_dm646x()) {
		bank_irq = IRQ_DM646X_GPIOBNK0;
	} else {
		printk(KERN_ERR "Don't know first GPIO bank IRQ.\n");
		return -EINVAL;
	}

	clk = clk_get(NULL, "gpio");
	if (IS_ERR(clk)) {
		printk(KERN_ERR "Error %ld getting gpio clock?\n",
		       PTR_ERR(clk));
		return PTR_ERR(clk);
	}
	clk_enable(clk);

	for (gpio = 0, irq = gpio_to_irq(0), bank = 0;
			gpio < ngpio;
			bank++, bank_irq++) {
		struct gpio_controller	*__iomem g = gpio2controller(gpio);
		unsigned		i;

		__raw_writel(~0, &g->clr_falling);
		__raw_writel(~0, &g->clr_rising);

		/* set up all irqs in this bank */
		set_irq_chained_handler(bank_irq, gpio_irq_handler);
		set_irq_chip_data(bank_irq, g);
		set_irq_data(bank_irq, (void *)irq);

		for (i = 0; i < 16 && gpio < ngpio; i++, irq++, gpio++) {
			set_irq_chip(irq, &gpio_irqchip);
			set_irq_chip_data(irq, g);
			set_irq_handler(irq, handle_simple_irq);
			set_irq_flags(irq, IRQF_VALID);
		}

		binten |= BIT(bank);
	}

	/* BINTEN -- per-bank interrupt enable. genirq would also let these
	 * bits be set/cleared dynamically.
	 */
	__raw_writel(binten, (void *__iomem)
		     IO_ADDRESS(DAVINCI_GPIO_BASE + 0x08));

	printk(KERN_INFO "DaVinci: %d gpio irqs\n", irq - gpio_to_irq(0));

	return 0;
}
Commit	Line	Data
3d9edf09 VB	1	/*
	2	* TI DaVinci GPIO Support
	3	*
dce1115b	4	* Copyright (c) 2006-2007 David Brownell
3d9edf09 VB	5	* Copyright (c) 2007, MontaVista Software, Inc. <source@mvista.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*/
	12
	13	#include <linux/errno.h>
	14	#include <linux/kernel.h>
	15	#include <linux/list.h>
	16	#include <linux/module.h>
	17	#include <linux/clk.h>
	18	#include <linux/err.h>
	19	#include <linux/io.h>
	20	#include <linux/irq.h>
	21	#include <linux/bitops.h>
	22
474dad54	23	#include <mach/cputype.h>
a09e64fb RK	24	#include <mach/irqs.h>
	25	#include <mach/hardware.h>
	26	#include <mach/gpio.h>
3d9edf09 VB	27
	28	#include <asm/mach/irq.h>
	29
3d9edf09	30
dce1115b	31	static DEFINE_SPINLOCK(gpio_lock);
3d9edf09	32
dce1115b DB	33	struct davinci_gpio {
	34	struct gpio_chip chip;
	35	struct gpio_controller *__iomem regs;
	36	};
3d9edf09	37
dce1115b	38	static struct davinci_gpio chips[DIV_ROUND_UP(DAVINCI_N_GPIO, 32)];
3d9edf09	39
474dad54	40	static unsigned __initdata ngpio;
3d9edf09 VB	41
3d9edf09 VB	42	/* create a non-inlined version */
474dad54	43	static struct gpio_controller __iomem * __init gpio2controller(unsigned gpio)
3d9edf09 VB	44	{
	45	return __gpio_to_controller(gpio);
	46	}
	47
dc756026	48	static int __init davinci_gpio_irq_setup(void);
dce1115b DB	49
	50	/--------------------------------------------------------------------------/
	51
3d9edf09	52	/*
dce1115b DB	53	* board setup code MUST set PINMUX0 and PINMUX1 as
dce1115b DB	54	* needed, and enable the GPIO clock.
3d9edf09	55	*/
dce1115b DB	56
dce1115b DB	57	static int davinci_direction_in(struct gpio_chip *chip, unsigned offset)
3d9edf09	58	{
dce1115b DB	59	struct davinci_gpio *d = container_of(chip, struct davinci_gpio, chip);
	60	struct gpio_controller *__iomem g = d->regs;
	61	u32 temp;
3d9edf09	62
dce1115b DB	63	spin_lock(&gpio_lock);
	64	temp = __raw_readl(&g->dir);
	65	temp \|= (1 << offset);
	66	__raw_writel(temp, &g->dir);
	67	spin_unlock(&gpio_lock);
3d9edf09	68
dce1115b DB	69	return 0;
dce1115b DB	70	}
3d9edf09 VB	71
	72	/*
	73	* Read the pin's value (works even if it's set up as output);
	74	* returns zero/nonzero.
	75	*
	76	* Note that changes are synched to the GPIO clock, so reading values back
	77	* right after you've set them may give old values.
	78	*/
dce1115b	79	static int davinci_gpio_get(struct gpio_chip *chip, unsigned offset)
3d9edf09	80	{
dce1115b DB	81	struct davinci_gpio *d = container_of(chip, struct davinci_gpio, chip);
dce1115b DB	82	struct gpio_controller *__iomem g = d->regs;
3d9edf09	83
dce1115b	84	return (1 << offset) & __raw_readl(&g->in_data);
3d9edf09	85	}
3d9edf09	86
dce1115b DB	87	static int
dce1115b DB	88	davinci_direction_out(struct gpio_chip *chip, unsigned offset, int value)
3d9edf09	89	{
dce1115b DB	90	struct davinci_gpio *d = container_of(chip, struct davinci_gpio, chip);
dce1115b DB	91	struct gpio_controller *__iomem g = d->regs;
3d9edf09	92	u32 temp;
dce1115b	93	u32 mask = 1 << offset;
3d9edf09 VB	94
3d9edf09 VB	95	spin_lock(&gpio_lock);
3d9edf09	96	temp = __raw_readl(&g->dir);
dce1115b DB	97	temp &= ~mask;
dce1115b DB	98	__raw_writel(mask, value ? &g->set_data : &g->clr_data);
3d9edf09 VB	99	__raw_writel(temp, &g->dir);
	100	spin_unlock(&gpio_lock);
	101	return 0;
	102	}
3d9edf09	103
dce1115b DB	104	/*
	105	* Assuming the pin is muxed as a gpio output, set its output value.
	106	*/
	107	static void
	108	davinci_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
3d9edf09	109	{
dce1115b DB	110	struct davinci_gpio *d = container_of(chip, struct davinci_gpio, chip);
dce1115b DB	111	struct gpio_controller *__iomem g = d->regs;
3d9edf09	112
dce1115b DB	113	__raw_writel((1 << offset), value ? &g->set_data : &g->clr_data);
	114	}
	115
	116	static int __init davinci_gpio_setup(void)
	117	{
	118	int i, base;
	119
474dad54 DB	120	/* The gpio banks conceptually expose a segmented bitmap,
	121	* and "ngpio" is one more than the largest zero-based
	122	* bit index that's valid.
	123	*/
	124	if (cpu_is_davinci_dm355()) { /* or dm335() */
	125	ngpio = 104;
	126	} else if (cpu_is_davinci_dm644x()) { /* or dm337() */
	127	ngpio = 71;
	128	} else if (cpu_is_davinci_dm646x()) {
	129	/* NOTE: each bank has several "reserved" bits,
	130	* unusable as GPIOs. Only 33 of the GPIO numbers
	131	* are usable, and we're not rejecting the others.
	132	*/
	133	ngpio = 43;
	134	} else {
	135	/* if cpu_is_davinci_dm643x() ngpio = 111 */
	136	pr_err("GPIO setup: how many GPIOs?\n");
	137	return -EINVAL;
	138	}
	139
	140	if (WARN_ON(DAVINCI_N_GPIO < ngpio))
	141	ngpio = DAVINCI_N_GPIO;
	142
	143	for (i = 0, base = 0; base < ngpio; i++, base += 32) {
dce1115b DB	144	chips[i].chip.label = "DaVinci";
	145
	146	chips[i].chip.direction_input = davinci_direction_in;
	147	chips[i].chip.get = davinci_gpio_get;
	148	chips[i].chip.direction_output = davinci_direction_out;
	149	chips[i].chip.set = davinci_gpio_set;
	150
	151	chips[i].chip.base = base;
474dad54	152	chips[i].chip.ngpio = ngpio - base;
dce1115b DB	153	if (chips[i].chip.ngpio > 32)
	154	chips[i].chip.ngpio = 32;
	155
	156	chips[i].regs = gpio2controller(base);
	157
	158	gpiochip_add(&chips[i].chip);
	159	}
3d9edf09	160
dc756026	161	davinci_gpio_irq_setup();
3d9edf09 VB	162	return 0;
3d9edf09 VB	163	}
dce1115b	164	pure_initcall(davinci_gpio_setup);
3d9edf09	165
dce1115b	166	/--------------------------------------------------------------------------/
3d9edf09 VB	167	/*
	168	* We expect irqs will normally be set up as input pins, but they can also be
	169	* used as output pins ... which is convenient for testing.
	170	*
474dad54 DB	171	* NOTE: The first few GPIOs also have direct INTC hookups in addition
	172	* to their GPIOBNK0 irq, with a bit less overhead but less flexibility
	173	* on triggering (e.g. no edge options). We don't try to use those.
3d9edf09	174	*
474dad54	175	* All those INTC hookups (direct, plus several IRQ banks) can also
3d9edf09 VB	176	* serve as EDMA event triggers.
	177	*/
	178
	179	static void gpio_irq_disable(unsigned irq)
	180	{
	181	struct gpio_controller *__iomem g = get_irq_chip_data(irq);
	182	u32 mask = __gpio_mask(irq_to_gpio(irq));
	183
	184	__raw_writel(mask, &g->clr_falling);
	185	__raw_writel(mask, &g->clr_rising);
	186	}
	187
	188	static void gpio_irq_enable(unsigned irq)
	189	{
	190	struct gpio_controller *__iomem g = get_irq_chip_data(irq);
	191	u32 mask = __gpio_mask(irq_to_gpio(irq));
df4aab46	192	unsigned status = irq_desc[irq].status;
3d9edf09	193
df4aab46 DB	194	status &= IRQ_TYPE_EDGE_FALLING \| IRQ_TYPE_EDGE_RISING;
	195	if (!status)
	196	status = IRQ_TYPE_EDGE_FALLING \| IRQ_TYPE_EDGE_RISING;
	197
	198	if (status & IRQ_TYPE_EDGE_FALLING)
3d9edf09	199	__raw_writel(mask, &g->set_falling);
df4aab46	200	if (status & IRQ_TYPE_EDGE_RISING)
3d9edf09 VB	201	__raw_writel(mask, &g->set_rising);
	202	}
	203
	204	static int gpio_irq_type(unsigned irq, unsigned trigger)
	205	{
	206	struct gpio_controller *__iomem g = get_irq_chip_data(irq);
	207	u32 mask = __gpio_mask(irq_to_gpio(irq));
	208
	209	if (trigger & ~(IRQ_TYPE_EDGE_FALLING \| IRQ_TYPE_EDGE_RISING))
	210	return -EINVAL;
	211
	212	irq_desc[irq].status &= ~IRQ_TYPE_SENSE_MASK;
	213	irq_desc[irq].status \|= trigger;
	214
df4aab46 DB	215	/* don't enable the IRQ if it's currently disabled */
	216	if (irq_desc[irq].depth == 0) {
	217	__raw_writel(mask, (trigger & IRQ_TYPE_EDGE_FALLING)
	218	? &g->set_falling : &g->clr_falling);
	219	__raw_writel(mask, (trigger & IRQ_TYPE_EDGE_RISING)
	220	? &g->set_rising : &g->clr_rising);
	221	}
3d9edf09 VB	222	return 0;
	223	}
	224
	225	static struct irq_chip gpio_irqchip = {
	226	.name = "GPIO",
	227	.enable = gpio_irq_enable,
	228	.disable = gpio_irq_disable,
	229	.set_type = gpio_irq_type,
	230	};
	231
	232	static void
	233	gpio_irq_handler(unsigned irq, struct irq_desc *desc)
	234	{
	235	struct gpio_controller *__iomem g = get_irq_chip_data(irq);
	236	u32 mask = 0xffff;
	237
	238	/* we only care about one bank */
	239	if (irq & 1)
	240	mask <<= 16;
	241
	242	/* temporarily mask (level sensitive) parent IRQ */
dc756026	243	desc->chip->mask(irq);
3d9edf09 VB	244	desc->chip->ack(irq);
	245	while (1) {
	246	u32 status;
3d9edf09 VB	247	int n;
	248	int res;
	249
	250	/* ack any irqs */
	251	status = __raw_readl(&g->intstat) & mask;
	252	if (!status)
	253	break;
	254	__raw_writel(status, &g->intstat);
	255	if (irq & 1)
	256	status >>= 16;
	257
	258	/* now demux them to the right lowlevel handler */
	259	n = (int)get_irq_data(irq);
3d9edf09 VB	260	while (status) {
	261	res = ffs(status);
	262	n += res;
d8aa0251	263	generic_handle_irq(n - 1);
3d9edf09 VB	264	status >>= res;
	265	}
	266	}
	267	desc->chip->unmask(irq);
	268	/* now it may re-trigger */
	269	}
	270
	271	/*
474dad54 DB	272	* NOTE: for suspend/resume, probably best to make a platform_device with
474dad54 DB	273	* suspend_late/resume_resume calls hooking into results of the set_wake()
3d9edf09 VB	274	* calls ... so if no gpios are wakeup events the clock can be disabled,
3d9edf09 VB	275	* with outputs left at previously set levels, and so that VDD3P3V.IOPWDN0
474dad54	276	* (dm6446) can be set appropriately for GPIOV33 pins.
3d9edf09 VB	277	*/
	278
	279	static int __init davinci_gpio_irq_setup(void)
	280	{
	281	unsigned gpio, irq, bank;
474dad54	282	unsigned bank_irq;
3d9edf09	283	struct clk *clk;
474dad54 DB	284	u32 binten = 0;
	285
	286	if (cpu_is_davinci_dm355()) { /* or dm335() */
	287	bank_irq = IRQ_DM355_GPIOBNK0;
	288	} else if (cpu_is_davinci_dm644x()) {
	289	bank_irq = IRQ_GPIOBNK0;
	290	} else if (cpu_is_davinci_dm646x()) {
	291	bank_irq = IRQ_DM646X_GPIOBNK0;
	292	} else {
	293	printk(KERN_ERR "Don't know first GPIO bank IRQ.\n");
	294	return -EINVAL;
	295	}
3d9edf09 VB	296
	297	clk = clk_get(NULL, "gpio");
	298	if (IS_ERR(clk)) {
	299	printk(KERN_ERR "Error %ld getting gpio clock?\n",
	300	PTR_ERR(clk));
474dad54	301	return PTR_ERR(clk);
3d9edf09	302	}
3d9edf09 VB	303	clk_enable(clk);
3d9edf09 VB	304
474dad54 DB	305	for (gpio = 0, irq = gpio_to_irq(0), bank = 0;
	306	gpio < ngpio;
	307	bank++, bank_irq++) {
3d9edf09 VB	308	struct gpio_controller *__iomem g = gpio2controller(gpio);
	309	unsigned i;
	310
	311	__raw_writel(~0, &g->clr_falling);
	312	__raw_writel(~0, &g->clr_rising);
	313
	314	/* set up all irqs in this bank */
474dad54 DB	315	set_irq_chained_handler(bank_irq, gpio_irq_handler);
	316	set_irq_chip_data(bank_irq, g);
	317	set_irq_data(bank_irq, (void *)irq);
3d9edf09	318
474dad54	319	for (i = 0; i < 16 && gpio < ngpio; i++, irq++, gpio++) {
3d9edf09 VB	320	set_irq_chip(irq, &gpio_irqchip);
	321	set_irq_chip_data(irq, g);
	322	set_irq_handler(irq, handle_simple_irq);
	323	set_irq_flags(irq, IRQF_VALID);
	324	}
474dad54 DB	325
474dad54 DB	326	binten \|= BIT(bank);
3d9edf09 VB	327	}
	328
	329	/* BINTEN -- per-bank interrupt enable. genirq would also let these
	330	* bits be set/cleared dynamically.
	331	*/
474dad54	332	__raw_writel(binten, (void *__iomem)
3d9edf09 VB	333	IO_ADDRESS(DAVINCI_GPIO_BASE + 0x08));
	334
	335	printk(KERN_INFO "DaVinci: %d gpio irqs\n", irq - gpio_to_irq(0));
	336
	337	return 0;
	338	}