[deliverable/linux.git] / drivers / gpio / gpio-mpc5200.c

/*
 * MPC52xx gpio driver
 *
 * Copyright (c) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/of.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/of_gpio.h>
#include <linux/io.h>
#include <linux/of_platform.h>
#include <linux/module.h>

#include <asm/gpio.h>
#include <asm/mpc52xx.h>
#include <sysdev/fsl_soc.h>

static DEFINE_SPINLOCK(gpio_lock);

struct mpc52xx_gpiochip {
	struct of_mm_gpio_chip mmchip;
	unsigned int shadow_dvo;
	unsigned int shadow_gpioe;
	unsigned int shadow_ddr;
};

/*
 * GPIO LIB API implementation for wakeup GPIOs.
 *
 * There's a maximum of 8 wakeup GPIOs. Which of these are available
 * for use depends on your board setup.
 *
 * 0 -> GPIO_WKUP_7
 * 1 -> GPIO_WKUP_6
 * 2 -> PSC6_1
 * 3 -> PSC6_0
 * 4 -> ETH_17
 * 5 -> PSC3_9
 * 6 -> PSC2_4
 * 7 -> PSC1_4
 *
 */
static int mpc52xx_wkup_gpio_get(struct gpio_chip *gc, unsigned int gpio)
{
	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
	struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
	unsigned int ret;

	ret = (in_8(&regs->wkup_ival) >> (7 - gpio)) & 1;

	pr_debug("%s: gpio: %d ret: %d\n", __func__, gpio, ret);

	return ret;
}

static inline void
__mpc52xx_wkup_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
{
	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
	struct mpc52xx_gpiochip *chip = container_of(mm_gc,
			struct mpc52xx_gpiochip, mmchip);
	struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;

	if (val)
		chip->shadow_dvo |= 1 << (7 - gpio);
	else
		chip->shadow_dvo &= ~(1 << (7 - gpio));

	out_8(&regs->wkup_dvo, chip->shadow_dvo);
}

static void
mpc52xx_wkup_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
{
	unsigned long flags;

	spin_lock_irqsave(&gpio_lock, flags);

	__mpc52xx_wkup_gpio_set(gc, gpio, val);

	spin_unlock_irqrestore(&gpio_lock, flags);

	pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
}

static int mpc52xx_wkup_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
{
	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
	struct mpc52xx_gpiochip *chip = container_of(mm_gc,
			struct mpc52xx_gpiochip, mmchip);
	struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
	unsigned long flags;

	spin_lock_irqsave(&gpio_lock, flags);

	/* set the direction */
	chip->shadow_ddr &= ~(1 << (7 - gpio));
	out_8(&regs->wkup_ddr, chip->shadow_ddr);

	/* and enable the pin */
	chip->shadow_gpioe |= 1 << (7 - gpio);
	out_8(&regs->wkup_gpioe, chip->shadow_gpioe);

	spin_unlock_irqrestore(&gpio_lock, flags);

	return 0;
}

static int
mpc52xx_wkup_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
{
	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
	struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
	struct mpc52xx_gpiochip *chip = container_of(mm_gc,
			struct mpc52xx_gpiochip, mmchip);
	unsigned long flags;

	spin_lock_irqsave(&gpio_lock, flags);

	__mpc52xx_wkup_gpio_set(gc, gpio, val);

	/* Then set direction */
	chip->shadow_ddr |= 1 << (7 - gpio);
	out_8(&regs->wkup_ddr, chip->shadow_ddr);

	/* Finally enable the pin */
	chip->shadow_gpioe |= 1 << (7 - gpio);
	out_8(&regs->wkup_gpioe, chip->shadow_gpioe);

	spin_unlock_irqrestore(&gpio_lock, flags);

	pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);

	return 0;
}

static int mpc52xx_wkup_gpiochip_probe(struct platform_device *ofdev)
{
	struct mpc52xx_gpiochip *chip;
	struct mpc52xx_gpio_wkup __iomem *regs;
	struct gpio_chip *gc;
	int ret;

	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
	if (!chip)
		return -ENOMEM;

	gc = &chip->mmchip.gc;

	gc->ngpio            = 8;
	gc->direction_input  = mpc52xx_wkup_gpio_dir_in;
	gc->direction_output = mpc52xx_wkup_gpio_dir_out;
	gc->get              = mpc52xx_wkup_gpio_get;
	gc->set              = mpc52xx_wkup_gpio_set;

	ret = of_mm_gpiochip_add(ofdev->dev.of_node, &chip->mmchip);
	if (ret)
		return ret;

	regs = chip->mmchip.regs;
	chip->shadow_gpioe = in_8(&regs->wkup_gpioe);
	chip->shadow_ddr = in_8(&regs->wkup_ddr);
	chip->shadow_dvo = in_8(&regs->wkup_dvo);

	return 0;
}

static int mpc52xx_gpiochip_remove(struct platform_device *ofdev)
{
	return -EBUSY;
}

static const struct of_device_id mpc52xx_wkup_gpiochip_match[] = {
	{ .compatible = "fsl,mpc5200-gpio-wkup", },
	{}
};

static struct platform_driver mpc52xx_wkup_gpiochip_driver = {
	.driver = {
		.name = "mpc5200-gpio-wkup",
		.of_match_table = mpc52xx_wkup_gpiochip_match,
	},
	.probe = mpc52xx_wkup_gpiochip_probe,
	.remove = mpc52xx_gpiochip_remove,
};

/*
 * GPIO LIB API implementation for simple GPIOs
 *
 * There's a maximum of 32 simple GPIOs. Which of these are available
 * for use depends on your board setup.
 * The numbering reflects the bit numbering in the port registers:
 *
 *  0..1  > reserved
 *  2..3  > IRDA
 *  4..7  > ETHR
 *  8..11 > reserved
 * 12..15 > USB
 * 16..17 > reserved
 * 18..23 > PSC3
 * 24..27 > PSC2
 * 28..31 > PSC1
 */
static int mpc52xx_simple_gpio_get(struct gpio_chip *gc, unsigned int gpio)
{
	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
	struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
	unsigned int ret;

	ret = (in_be32(&regs->simple_ival) >> (31 - gpio)) & 1;

	return ret;
}

static inline void
__mpc52xx_simple_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
{
	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
	struct mpc52xx_gpiochip *chip = container_of(mm_gc,
			struct mpc52xx_gpiochip, mmchip);
	struct mpc52xx_gpio __iomem *regs = mm_gc->regs;

	if (val)
		chip->shadow_dvo |= 1 << (31 - gpio);
	else
		chip->shadow_dvo &= ~(1 << (31 - gpio));
	out_be32(&regs->simple_dvo, chip->shadow_dvo);
}

static void
mpc52xx_simple_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
{
	unsigned long flags;

	spin_lock_irqsave(&gpio_lock, flags);

	__mpc52xx_simple_gpio_set(gc, gpio, val);

	spin_unlock_irqrestore(&gpio_lock, flags);

	pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
}

static int mpc52xx_simple_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
{
	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
	struct mpc52xx_gpiochip *chip = container_of(mm_gc,
			struct mpc52xx_gpiochip, mmchip);
	struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
	unsigned long flags;

	spin_lock_irqsave(&gpio_lock, flags);

	/* set the direction */
	chip->shadow_ddr &= ~(1 << (31 - gpio));
	out_be32(&regs->simple_ddr, chip->shadow_ddr);

	/* and enable the pin */
	chip->shadow_gpioe |= 1 << (31 - gpio);
	out_be32(&regs->simple_gpioe, chip->shadow_gpioe);

	spin_unlock_irqrestore(&gpio_lock, flags);

	return 0;
}

static int
mpc52xx_simple_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
{
	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
	struct mpc52xx_gpiochip *chip = container_of(mm_gc,
			struct mpc52xx_gpiochip, mmchip);
	struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
	unsigned long flags;

	spin_lock_irqsave(&gpio_lock, flags);

	/* First set initial value */
	__mpc52xx_simple_gpio_set(gc, gpio, val);

	/* Then set direction */
	chip->shadow_ddr |= 1 << (31 - gpio);
	out_be32(&regs->simple_ddr, chip->shadow_ddr);

	/* Finally enable the pin */
	chip->shadow_gpioe |= 1 << (31 - gpio);
	out_be32(&regs->simple_gpioe, chip->shadow_gpioe);

	spin_unlock_irqrestore(&gpio_lock, flags);

	pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);

	return 0;
}

static int mpc52xx_simple_gpiochip_probe(struct platform_device *ofdev)
{
	struct mpc52xx_gpiochip *chip;
	struct gpio_chip *gc;
	struct mpc52xx_gpio __iomem *regs;
	int ret;

	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
	if (!chip)
		return -ENOMEM;

	gc = &chip->mmchip.gc;

	gc->ngpio            = 32;
	gc->direction_input  = mpc52xx_simple_gpio_dir_in;
	gc->direction_output = mpc52xx_simple_gpio_dir_out;
	gc->get              = mpc52xx_simple_gpio_get;
	gc->set              = mpc52xx_simple_gpio_set;

	ret = of_mm_gpiochip_add(ofdev->dev.of_node, &chip->mmchip);
	if (ret)
		return ret;

	regs = chip->mmchip.regs;
	chip->shadow_gpioe = in_be32(&regs->simple_gpioe);
	chip->shadow_ddr = in_be32(&regs->simple_ddr);
	chip->shadow_dvo = in_be32(&regs->simple_dvo);

	return 0;
}

static const struct of_device_id mpc52xx_simple_gpiochip_match[] = {
	{ .compatible = "fsl,mpc5200-gpio", },
	{}
};

static struct platform_driver mpc52xx_simple_gpiochip_driver = {
	.driver = {
		.name = "mpc5200-gpio",
		.of_match_table = mpc52xx_simple_gpiochip_match,
	},
	.probe = mpc52xx_simple_gpiochip_probe,
	.remove = mpc52xx_gpiochip_remove,
};

static int __init mpc52xx_gpio_init(void)
{
	if (platform_driver_register(&mpc52xx_wkup_gpiochip_driver))
		printk(KERN_ERR "Unable to register wakeup GPIO driver\n");

	if (platform_driver_register(&mpc52xx_simple_gpiochip_driver))
		printk(KERN_ERR "Unable to register simple GPIO driver\n");

	return 0;
}


/* Make sure we get initialised before anyone else tries to use us */
subsys_initcall(mpc52xx_gpio_init);

/* No exit call at the moment as we cannot unregister of gpio chips */

MODULE_DESCRIPTION("Freescale MPC52xx gpio driver");
MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
3cd2550c	1	/*
	2	* MPC52xx gpio driver
	3	*
	4	* Copyright (c) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18	*/
	19
	20	#include <linux/of.h>
	21	#include <linux/kernel.h>
5a0e3ad6	22	#include <linux/slab.h>
3cd2550c	23	#include <linux/of_gpio.h>
	24	#include <linux/io.h>
	25	#include <linux/of_platform.h>
bb207ef1	26	#include <linux/module.h>
3cd2550c	27
	28	#include <asm/gpio.h>
	29	#include <asm/mpc52xx.h>
	30	#include <sysdev/fsl_soc.h>
	31
	32	static DEFINE_SPINLOCK(gpio_lock);
	33
	34	struct mpc52xx_gpiochip {
	35	struct of_mm_gpio_chip mmchip;
	36	unsigned int shadow_dvo;
	37	unsigned int shadow_gpioe;
	38	unsigned int shadow_ddr;
	39	};
	40
	41	/*
	42	* GPIO LIB API implementation for wakeup GPIOs.
	43	*
	44	* There's a maximum of 8 wakeup GPIOs. Which of these are available
	45	* for use depends on your board setup.
	46	*
	47	* 0 -> GPIO_WKUP_7
	48	* 1 -> GPIO_WKUP_6
	49	* 2 -> PSC6_1
	50	* 3 -> PSC6_0
	51	* 4 -> ETH_17
	52	* 5 -> PSC3_9
	53	* 6 -> PSC2_4
	54	* 7 -> PSC1_4
	55	*
	56	*/
	57	static int mpc52xx_wkup_gpio_get(struct gpio_chip *gc, unsigned int gpio)
	58	{
	59	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
	60	struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
	61	unsigned int ret;
	62
	63	ret = (in_8(&regs->wkup_ival) >> (7 - gpio)) & 1;
	64
	65	pr_debug("%s: gpio: %d ret: %d\n", __func__, gpio, ret);
	66
	67	return ret;
	68	}
	69
	70	static inline void
	71	__mpc52xx_wkup_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
	72	{
	73	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
	74	struct mpc52xx_gpiochip *chip = container_of(mm_gc,
	75	struct mpc52xx_gpiochip, mmchip);
	76	struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
	77
	78	if (val)
	79	chip->shadow_dvo \|= 1 << (7 - gpio);
	80	else
	81	chip->shadow_dvo &= ~(1 << (7 - gpio));
	82
	83	out_8(&regs->wkup_dvo, chip->shadow_dvo);
	84	}
	85
	86	static void
	87	mpc52xx_wkup_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
	88	{
	89	unsigned long flags;
	90
91	spin_lock_irqsave(&gpio_lock, flags);
92
93	__mpc52xx_wkup_gpio_set(gc, gpio, val);
94
95	spin_unlock_irqrestore(&gpio_lock, flags);
96
97	pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
98	}
99
100	static int mpc52xx_wkup_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
101	{
102	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
103	struct mpc52xx_gpiochip *chip = container_of(mm_gc,
104	struct mpc52xx_gpiochip, mmchip);
93072457	105	struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
3cd2550c	106	unsigned long flags;
	107
	108	spin_lock_irqsave(&gpio_lock, flags);
	109
	110	/* set the direction */
	111	chip->shadow_ddr &= ~(1 << (7 - gpio));
	112	out_8(&regs->wkup_ddr, chip->shadow_ddr);
	113
	114	/* and enable the pin */
	115	chip->shadow_gpioe \|= 1 << (7 - gpio);
	116	out_8(&regs->wkup_gpioe, chip->shadow_gpioe);
	117
	118	spin_unlock_irqrestore(&gpio_lock, flags);
	119
	120	return 0;
	121	}
	122
	123	static int
	124	mpc52xx_wkup_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
	125	{
	126	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
93072457	127	struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs;
3cd2550c	128	struct mpc52xx_gpiochip *chip = container_of(mm_gc,
	129	struct mpc52xx_gpiochip, mmchip);
	130	unsigned long flags;
	131
	132	spin_lock_irqsave(&gpio_lock, flags);
	133
	134	__mpc52xx_wkup_gpio_set(gc, gpio, val);
	135
	136	/* Then set direction */
	137	chip->shadow_ddr \|= 1 << (7 - gpio);
	138	out_8(&regs->wkup_ddr, chip->shadow_ddr);
	139
	140	/* Finally enable the pin */
	141	chip->shadow_gpioe \|= 1 << (7 - gpio);
	142	out_8(&regs->wkup_gpioe, chip->shadow_gpioe);
	143
	144	spin_unlock_irqrestore(&gpio_lock, flags);
	145
	146	pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
	147
	148	return 0;
	149	}
	150
3836309d	151	static int mpc52xx_wkup_gpiochip_probe(struct platform_device *ofdev)
3cd2550c	152	{
3cd2550c	153	struct mpc52xx_gpiochip *chip;
93072457	154	struct mpc52xx_gpio_wkup __iomem *regs;
a19e3da5	155	struct gpio_chip *gc;
3cd2550c	156	int ret;
	157
	158	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
	159	if (!chip)
	160	return -ENOMEM;
	161
a19e3da5	162	gc = &chip->mmchip.gc;
3cd2550c	163
a19e3da5 AV	164	gc->ngpio = 8;
	165	gc->direction_input = mpc52xx_wkup_gpio_dir_in;
	166	gc->direction_output = mpc52xx_wkup_gpio_dir_out;
	167	gc->get = mpc52xx_wkup_gpio_get;
	168	gc->set = mpc52xx_wkup_gpio_set;
3cd2550c	169
61c7a080	170	ret = of_mm_gpiochip_add(ofdev->dev.of_node, &chip->mmchip);
3cd2550c	171	if (ret)
	172	return ret;
	173
	174	regs = chip->mmchip.regs;
	175	chip->shadow_gpioe = in_8(&regs->wkup_gpioe);
	176	chip->shadow_ddr = in_8(&regs->wkup_ddr);
	177	chip->shadow_dvo = in_8(&regs->wkup_dvo);
	178
	179	return 0;
	180	}
	181
a454dc50	182	static int mpc52xx_gpiochip_remove(struct platform_device *ofdev)
3cd2550c	183	{
	184	return -EBUSY;
	185	}
	186
	187	static const struct of_device_id mpc52xx_wkup_gpiochip_match[] = {
6eae1ace	188	{ .compatible = "fsl,mpc5200-gpio-wkup", },
3cd2550c	189	{}
	190	};
	191
00006124	192	static struct platform_driver mpc52xx_wkup_gpiochip_driver = {
4018294b	193	.driver = {
6eae1ace	194	.name = "mpc5200-gpio-wkup",
4018294b GL	195	.of_match_table = mpc52xx_wkup_gpiochip_match,
4018294b GL	196	},
3cd2550c	197	.probe = mpc52xx_wkup_gpiochip_probe,
	198	.remove = mpc52xx_gpiochip_remove,
	199	};
	200
	201	/*
	202	* GPIO LIB API implementation for simple GPIOs
	203	*
	204	* There's a maximum of 32 simple GPIOs. Which of these are available
	205	* for use depends on your board setup.
	206	* The numbering reflects the bit numbering in the port registers:
	207	*
	208	* 0..1 > reserved
	209	* 2..3 > IRDA
	210	* 4..7 > ETHR
	211	* 8..11 > reserved
	212	* 12..15 > USB
	213	* 16..17 > reserved
	214	* 18..23 > PSC3
	215	* 24..27 > PSC2
	216	* 28..31 > PSC1
	217	*/
	218	static int mpc52xx_simple_gpio_get(struct gpio_chip *gc, unsigned int gpio)
	219	{
	220	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
	221	struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
	222	unsigned int ret;
	223
	224	ret = (in_be32(&regs->simple_ival) >> (31 - gpio)) & 1;
	225
	226	return ret;
	227	}
	228
	229	static inline void
	230	__mpc52xx_simple_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
	231	{
	232	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
	233	struct mpc52xx_gpiochip *chip = container_of(mm_gc,
	234	struct mpc52xx_gpiochip, mmchip);
	235	struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
	236
	237	if (val)
	238	chip->shadow_dvo \|= 1 << (31 - gpio);
	239	else
	240	chip->shadow_dvo &= ~(1 << (31 - gpio));
	241	out_be32(&regs->simple_dvo, chip->shadow_dvo);
	242	}
	243
	244	static void
	245	mpc52xx_simple_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
	246	{
	247	unsigned long flags;
	248
	249	spin_lock_irqsave(&gpio_lock, flags);
	250
	251	__mpc52xx_simple_gpio_set(gc, gpio, val);
	252
	253	spin_unlock_irqrestore(&gpio_lock, flags);
	254
	255	pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
	256	}
	257
	258	static int mpc52xx_simple_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
	259	{
	260	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
261	struct mpc52xx_gpiochip *chip = container_of(mm_gc,
262	struct mpc52xx_gpiochip, mmchip);
93072457	263	struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
3cd2550c	264	unsigned long flags;
	265
	266	spin_lock_irqsave(&gpio_lock, flags);
	267
	268	/* set the direction */
	269	chip->shadow_ddr &= ~(1 << (31 - gpio));
	270	out_be32(&regs->simple_ddr, chip->shadow_ddr);
	271
	272	/* and enable the pin */
	273	chip->shadow_gpioe \|= 1 << (31 - gpio);
	274	out_be32(&regs->simple_gpioe, chip->shadow_gpioe);
	275
	276	spin_unlock_irqrestore(&gpio_lock, flags);
	277
	278	return 0;
	279	}
	280
	281	static int
	282	mpc52xx_simple_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
	283	{
	284	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
	285	struct mpc52xx_gpiochip *chip = container_of(mm_gc,
	286	struct mpc52xx_gpiochip, mmchip);
93072457	287	struct mpc52xx_gpio __iomem *regs = mm_gc->regs;
3cd2550c	288	unsigned long flags;
	289
	290	spin_lock_irqsave(&gpio_lock, flags);
	291
	292	/* First set initial value */
	293	__mpc52xx_simple_gpio_set(gc, gpio, val);
	294
	295	/* Then set direction */
	296	chip->shadow_ddr \|= 1 << (31 - gpio);
	297	out_be32(&regs->simple_ddr, chip->shadow_ddr);
	298
	299	/* Finally enable the pin */
	300	chip->shadow_gpioe \|= 1 << (31 - gpio);
	301	out_be32(&regs->simple_gpioe, chip->shadow_gpioe);
	302
	303	spin_unlock_irqrestore(&gpio_lock, flags);
	304
	305	pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val);
	306
	307	return 0;
	308	}
	309
3836309d	310	static int mpc52xx_simple_gpiochip_probe(struct platform_device *ofdev)
3cd2550c	311	{
3cd2550c	312	struct mpc52xx_gpiochip *chip;
a19e3da5	313	struct gpio_chip *gc;
93072457	314	struct mpc52xx_gpio __iomem *regs;
3cd2550c	315	int ret;
	316
	317	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
	318	if (!chip)
	319	return -ENOMEM;
	320
a19e3da5	321	gc = &chip->mmchip.gc;
3cd2550c	322
a19e3da5 AV	323	gc->ngpio = 32;
	324	gc->direction_input = mpc52xx_simple_gpio_dir_in;
	325	gc->direction_output = mpc52xx_simple_gpio_dir_out;
	326	gc->get = mpc52xx_simple_gpio_get;
	327	gc->set = mpc52xx_simple_gpio_set;
3cd2550c	328
61c7a080	329	ret = of_mm_gpiochip_add(ofdev->dev.of_node, &chip->mmchip);
3cd2550c	330	if (ret)
	331	return ret;
	332
	333	regs = chip->mmchip.regs;
	334	chip->shadow_gpioe = in_be32(&regs->simple_gpioe);
	335	chip->shadow_ddr = in_be32(&regs->simple_ddr);
	336	chip->shadow_dvo = in_be32(&regs->simple_dvo);
	337
	338	return 0;
	339	}
	340
	341	static const struct of_device_id mpc52xx_simple_gpiochip_match[] = {
6eae1ace	342	{ .compatible = "fsl,mpc5200-gpio", },
3cd2550c	343	{}
	344	};
	345
00006124	346	static struct platform_driver mpc52xx_simple_gpiochip_driver = {
4018294b	347	.driver = {
6eae1ace	348	.name = "mpc5200-gpio",
4018294b GL	349	.of_match_table = mpc52xx_simple_gpiochip_match,
4018294b GL	350	},
3cd2550c	351	.probe = mpc52xx_simple_gpiochip_probe,
	352	.remove = mpc52xx_gpiochip_remove,
	353	};
	354
3cd2550c	355	static int __init mpc52xx_gpio_init(void)
3cd2550c	356	{
00006124	357	if (platform_driver_register(&mpc52xx_wkup_gpiochip_driver))
3cd2550c	358	printk(KERN_ERR "Unable to register wakeup GPIO driver\n");
3cd2550c	359
00006124	360	if (platform_driver_register(&mpc52xx_simple_gpiochip_driver))
3cd2550c	361	printk(KERN_ERR "Unable to register simple GPIO driver\n");
3cd2550c	362
3cd2550c	363	return 0;
	364	}
	365
	366
	367	/* Make sure we get initialised before anyone else tries to use us */
	368	subsys_initcall(mpc52xx_gpio_init);
	369
	370	/* No exit call at the moment as we cannot unregister of gpio chips */
	371
	372	MODULE_DESCRIPTION("Freescale MPC52xx gpio driver");
	373	MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
	374	MODULE_LICENSE("GPL v2");
	375