[linux-2.6-block.git] / drivers / mfd / rc5t583-irq.c

/*
 * Interrupt driver for RICOH583 power management chip.
 *
 * Copyright (c) 2011-2012, NVIDIA CORPORATION.  All rights reserved.
 * Author: Laxman dewangan <ldewangan@nvidia.com>
 *
 * based on code
 *      Copyright (C) 2011 RICOH COMPANY,LTD
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
 *
 */
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/mfd/rc5t583.h>

enum int_type {
	SYS_INT  = 0x1,
	DCDC_INT = 0x2,
	RTC_INT  = 0x4,
	ADC_INT  = 0x8,
	GPIO_INT = 0x10,
};

static int gpedge_add[] = {
	RC5T583_GPIO_GPEDGE2,
	RC5T583_GPIO_GPEDGE2
};

static int irq_en_add[] = {
	RC5T583_INT_EN_SYS1,
	RC5T583_INT_EN_SYS2,
	RC5T583_INT_EN_DCDC,
	RC5T583_INT_EN_RTC,
	RC5T583_INT_EN_ADC1,
	RC5T583_INT_EN_ADC2,
	RC5T583_INT_EN_ADC3,
	RC5T583_GPIO_EN_INT
};

static int irq_mon_add[] = {
	RC5T583_INT_MON_SYS1,
	RC5T583_INT_MON_SYS2,
	RC5T583_INT_MON_DCDC,
	RC5T583_INT_MON_RTC,
	RC5T583_INT_IR_ADCL,
	RC5T583_INT_IR_ADCH,
	RC5T583_INT_IR_ADCEND,
	RC5T583_INT_IR_GPIOF,
	RC5T583_INT_IR_GPIOR
};

static int irq_clr_add[] = {
	RC5T583_INT_IR_SYS1,
	RC5T583_INT_IR_SYS2,
	RC5T583_INT_IR_DCDC,
	RC5T583_INT_IR_RTC,
	RC5T583_INT_IR_ADCL,
	RC5T583_INT_IR_ADCH,
	RC5T583_INT_IR_ADCEND,
	RC5T583_INT_IR_GPIOF,
	RC5T583_INT_IR_GPIOR
};

static int main_int_type[] = {
	SYS_INT,
	SYS_INT,
	DCDC_INT,
	RTC_INT,
	ADC_INT,
	ADC_INT,
	ADC_INT,
	GPIO_INT,
	GPIO_INT,
};

struct rc5t583_irq_data {
	u8	int_type;
	u8	master_bit;
	u8	int_en_bit;
	u8	mask_reg_index;
	int	grp_index;
};

#define RC5T583_IRQ(_int_type, _master_bit, _grp_index, \
			_int_bit, _mask_ind)		\
	{						\
		.int_type	= _int_type,		\
		.master_bit	= _master_bit,		\
		.grp_index	= _grp_index,		\
		.int_en_bit	= _int_bit,		\
		.mask_reg_index	= _mask_ind,		\
	}

static const struct rc5t583_irq_data rc5t583_irqs[RC5T583_MAX_IRQS] = {
	[RC5T583_IRQ_ONKEY]		= RC5T583_IRQ(SYS_INT,  0, 0, 0, 0),
	[RC5T583_IRQ_ACOK]		= RC5T583_IRQ(SYS_INT,  0, 1, 1, 0),
	[RC5T583_IRQ_LIDOPEN]		= RC5T583_IRQ(SYS_INT,  0, 2, 2, 0),
	[RC5T583_IRQ_PREOT]		= RC5T583_IRQ(SYS_INT,  0, 3, 3, 0),
	[RC5T583_IRQ_CLKSTP]		= RC5T583_IRQ(SYS_INT,  0, 4, 4, 0),
	[RC5T583_IRQ_ONKEY_OFF]		= RC5T583_IRQ(SYS_INT,  0, 5, 5, 0),
	[RC5T583_IRQ_WD]		= RC5T583_IRQ(SYS_INT,  0, 7, 7, 0),
	[RC5T583_IRQ_EN_PWRREQ1]	= RC5T583_IRQ(SYS_INT,  0, 8, 0, 1),
	[RC5T583_IRQ_EN_PWRREQ2]	= RC5T583_IRQ(SYS_INT,  0, 9, 1, 1),
	[RC5T583_IRQ_PRE_VINDET]	= RC5T583_IRQ(SYS_INT,  0, 10, 2, 1),

	[RC5T583_IRQ_DC0LIM]		= RC5T583_IRQ(DCDC_INT, 1, 0, 0, 2),
	[RC5T583_IRQ_DC1LIM]		= RC5T583_IRQ(DCDC_INT, 1, 1, 1, 2),
	[RC5T583_IRQ_DC2LIM]		= RC5T583_IRQ(DCDC_INT, 1, 2, 2, 2),
	[RC5T583_IRQ_DC3LIM]		= RC5T583_IRQ(DCDC_INT, 1, 3, 3, 2),

	[RC5T583_IRQ_CTC]		= RC5T583_IRQ(RTC_INT,  2, 0, 0, 3),
	[RC5T583_IRQ_YALE]		= RC5T583_IRQ(RTC_INT,  2, 5, 5, 3),
	[RC5T583_IRQ_DALE]		= RC5T583_IRQ(RTC_INT,  2, 6, 6, 3),
	[RC5T583_IRQ_WALE]		= RC5T583_IRQ(RTC_INT,  2, 7, 7, 3),

	[RC5T583_IRQ_AIN1L]		= RC5T583_IRQ(ADC_INT,  3, 0, 0, 4),
	[RC5T583_IRQ_AIN2L]		= RC5T583_IRQ(ADC_INT,  3, 1, 1, 4),
	[RC5T583_IRQ_AIN3L]		= RC5T583_IRQ(ADC_INT,  3, 2, 2, 4),
	[RC5T583_IRQ_VBATL]		= RC5T583_IRQ(ADC_INT,  3, 3, 3, 4),
	[RC5T583_IRQ_VIN3L]		= RC5T583_IRQ(ADC_INT,  3, 4, 4, 4),
	[RC5T583_IRQ_VIN8L]		= RC5T583_IRQ(ADC_INT,  3, 5, 5, 4),
	[RC5T583_IRQ_AIN1H]		= RC5T583_IRQ(ADC_INT,  3, 6, 0, 5),
	[RC5T583_IRQ_AIN2H]		= RC5T583_IRQ(ADC_INT,  3, 7, 1, 5),
	[RC5T583_IRQ_AIN3H]		= RC5T583_IRQ(ADC_INT,  3, 8, 2, 5),
	[RC5T583_IRQ_VBATH]		= RC5T583_IRQ(ADC_INT,  3, 9, 3, 5),
	[RC5T583_IRQ_VIN3H]		= RC5T583_IRQ(ADC_INT,  3, 10, 4, 5),
	[RC5T583_IRQ_VIN8H]		= RC5T583_IRQ(ADC_INT,  3, 11, 5, 5),
	[RC5T583_IRQ_ADCEND]		= RC5T583_IRQ(ADC_INT,  3, 12, 0, 6),

	[RC5T583_IRQ_GPIO0]		= RC5T583_IRQ(GPIO_INT, 4, 0, 0, 7),
	[RC5T583_IRQ_GPIO1]		= RC5T583_IRQ(GPIO_INT, 4, 1, 1, 7),
	[RC5T583_IRQ_GPIO2]		= RC5T583_IRQ(GPIO_INT, 4, 2, 2, 7),
	[RC5T583_IRQ_GPIO3]		= RC5T583_IRQ(GPIO_INT, 4, 3, 3, 7),
	[RC5T583_IRQ_GPIO4]		= RC5T583_IRQ(GPIO_INT, 4, 4, 4, 7),
	[RC5T583_IRQ_GPIO5]		= RC5T583_IRQ(GPIO_INT, 4, 5, 5, 7),
	[RC5T583_IRQ_GPIO6]		= RC5T583_IRQ(GPIO_INT, 4, 6, 6, 7),
	[RC5T583_IRQ_GPIO7]		= RC5T583_IRQ(GPIO_INT, 4, 7, 7, 7),
};

static void rc5t583_irq_lock(struct irq_data *irq_data)
{
	struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
	mutex_lock(&rc5t583->irq_lock);
}

static void rc5t583_irq_unmask(struct irq_data *irq_data)
{
	struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
	unsigned int __irq = irq_data->irq - rc5t583->irq_base;
	const struct rc5t583_irq_data *data = &rc5t583_irqs[__irq];

	rc5t583->group_irq_en[data->grp_index] |= 1 << data->grp_index;
	rc5t583->intc_inten_reg |= 1 << data->master_bit;
	rc5t583->irq_en_reg[data->mask_reg_index] |= 1 << data->int_en_bit;
}

static void rc5t583_irq_mask(struct irq_data *irq_data)
{
	struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
	unsigned int __irq = irq_data->irq - rc5t583->irq_base;
	const struct rc5t583_irq_data *data = &rc5t583_irqs[__irq];

	rc5t583->group_irq_en[data->grp_index] &= ~(1 << data->grp_index);
	if (!rc5t583->group_irq_en[data->grp_index])
		rc5t583->intc_inten_reg &= ~(1 << data->master_bit);

	rc5t583->irq_en_reg[data->mask_reg_index] &= ~(1 << data->int_en_bit);
}

static int rc5t583_irq_set_type(struct irq_data *irq_data, unsigned int type)
{
	struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
	unsigned int __irq = irq_data->irq - rc5t583->irq_base;
	const struct rc5t583_irq_data *data = &rc5t583_irqs[__irq];
	int val = 0;
	int gpedge_index;
	int gpedge_bit_pos;

	/* Supporting only trigger level inetrrupt */
	if ((data->int_type & GPIO_INT) && (type & IRQ_TYPE_EDGE_BOTH)) {
		gpedge_index = data->int_en_bit / 4;
		gpedge_bit_pos = data->int_en_bit % 4;

		if (type & IRQ_TYPE_EDGE_FALLING)
			val |= 0x2;

		if (type & IRQ_TYPE_EDGE_RISING)
			val |= 0x1;

		rc5t583->gpedge_reg[gpedge_index] &= ~(3 << gpedge_bit_pos);
		rc5t583->gpedge_reg[gpedge_index] |= (val << gpedge_bit_pos);
		rc5t583_irq_unmask(irq_data);
		return 0;
	}
	return -EINVAL;
}

static void rc5t583_irq_sync_unlock(struct irq_data *irq_data)
{
	struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
	int i;
	int ret;

	for (i = 0; i < ARRAY_SIZE(rc5t583->gpedge_reg); i++) {
		ret = rc5t583_write(rc5t583->dev, gpedge_add[i],
				rc5t583->gpedge_reg[i]);
		if (ret < 0)
			dev_warn(rc5t583->dev,
				"Error in writing reg 0x%02x error: %d\n",
				gpedge_add[i], ret);
	}

	for (i = 0; i < ARRAY_SIZE(rc5t583->irq_en_reg); i++) {
		ret = rc5t583_write(rc5t583->dev, irq_en_add[i],
					rc5t583->irq_en_reg[i]);
		if (ret < 0)
			dev_warn(rc5t583->dev,
				"Error in writing reg 0x%02x error: %d\n",
				irq_en_add[i], ret);
	}

	ret = rc5t583_write(rc5t583->dev, RC5T583_INTC_INTEN,
				rc5t583->intc_inten_reg);
	if (ret < 0)
		dev_warn(rc5t583->dev,
			"Error in writing reg 0x%02x error: %d\n",
			RC5T583_INTC_INTEN, ret);

	mutex_unlock(&rc5t583->irq_lock);
}
#ifdef CONFIG_PM_SLEEP
static int rc5t583_irq_set_wake(struct irq_data *irq_data, unsigned int on)
{
	struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
	return irq_set_irq_wake(rc5t583->chip_irq, on);
}
#else
#define rc5t583_irq_set_wake NULL
#endif

static irqreturn_t rc5t583_irq(int irq, void *data)
{
	struct rc5t583 *rc5t583 = data;
	uint8_t int_sts[RC5T583_MAX_INTERRUPT_MASK_REGS];
	uint8_t master_int;
	int i;
	int ret;
	unsigned int rtc_int_sts = 0;

	/* Clear the status */
	for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; i++)
		int_sts[i] = 0;

	ret  = rc5t583_read(rc5t583->dev, RC5T583_INTC_INTMON, &master_int);
	if (ret < 0) {
		dev_err(rc5t583->dev,
			"Error in reading reg 0x%02x error: %d\n",
			RC5T583_INTC_INTMON, ret);
		return IRQ_HANDLED;
	}

	for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; ++i) {
		if (!(master_int & main_int_type[i]))
			continue;

		ret = rc5t583_read(rc5t583->dev, irq_mon_add[i], &int_sts[i]);
		if (ret < 0) {
			dev_warn(rc5t583->dev,
				"Error in reading reg 0x%02x error: %d\n",
				irq_mon_add[i], ret);
			int_sts[i] = 0;
			continue;
		}

		if (main_int_type[i] & RTC_INT) {
			rtc_int_sts = 0;
			if (int_sts[i] & 0x1)
				rtc_int_sts |= BIT(6);
			if (int_sts[i] & 0x2)
				rtc_int_sts |= BIT(7);
			if (int_sts[i] & 0x4)
				rtc_int_sts |= BIT(0);
			if (int_sts[i] & 0x8)
				rtc_int_sts |= BIT(5);
		}

		ret = rc5t583_write(rc5t583->dev, irq_clr_add[i],
				~int_sts[i]);
		if (ret < 0)
			dev_warn(rc5t583->dev,
				"Error in reading reg 0x%02x error: %d\n",
				irq_clr_add[i], ret);

		if (main_int_type[i] & RTC_INT)
			int_sts[i] = rtc_int_sts;
	}

	/* Merge gpio interrupts for rising and falling case*/
	int_sts[7] |= int_sts[8];

	/* Call interrupt handler if enabled */
	for (i = 0; i < RC5T583_MAX_IRQS; ++i) {
		const struct rc5t583_irq_data *data = &rc5t583_irqs[i];
		if ((int_sts[data->mask_reg_index] & (1 << data->int_en_bit)) &&
			(rc5t583->group_irq_en[data->master_bit] &
					(1 << data->grp_index)))
			handle_nested_irq(rc5t583->irq_base + i);
	}

	return IRQ_HANDLED;
}

static struct irq_chip rc5t583_irq_chip = {
	.name = "rc5t583-irq",
	.irq_mask = rc5t583_irq_mask,
	.irq_unmask = rc5t583_irq_unmask,
	.irq_bus_lock = rc5t583_irq_lock,
	.irq_bus_sync_unlock = rc5t583_irq_sync_unlock,
	.irq_set_type = rc5t583_irq_set_type,
	.irq_set_wake = rc5t583_irq_set_wake,
};

int rc5t583_irq_init(struct rc5t583 *rc5t583, int irq, int irq_base)
{
	int i, ret;

	if (!irq_base) {
		dev_warn(rc5t583->dev, "No interrupt support on IRQ base\n");
		return -EINVAL;
	}

	mutex_init(&rc5t583->irq_lock);

	/* Initailize all int register to 0 */
	for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; i++)  {
		ret = rc5t583_write(rc5t583->dev, irq_en_add[i],
				rc5t583->irq_en_reg[i]);
		if (ret < 0)
			dev_warn(rc5t583->dev,
				"Error in writing reg 0x%02x error: %d\n",
				irq_en_add[i], ret);
	}

	for (i = 0; i < RC5T583_MAX_GPEDGE_REG; i++)  {
		ret = rc5t583_write(rc5t583->dev, gpedge_add[i],
				rc5t583->gpedge_reg[i]);
		if (ret < 0)
			dev_warn(rc5t583->dev,
				"Error in writing reg 0x%02x error: %d\n",
				gpedge_add[i], ret);
	}

	ret = rc5t583_write(rc5t583->dev, RC5T583_INTC_INTEN, 0x0);
	if (ret < 0)
		dev_warn(rc5t583->dev,
			"Error in writing reg 0x%02x error: %d\n",
			RC5T583_INTC_INTEN, ret);

	/* Clear all interrupts in case they woke up active. */
	for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; i++)  {
		ret = rc5t583_write(rc5t583->dev, irq_clr_add[i], 0);
		if (ret < 0)
			dev_warn(rc5t583->dev,
				"Error in writing reg 0x%02x error: %d\n",
				irq_clr_add[i], ret);
	}

	rc5t583->irq_base = irq_base;
	rc5t583->chip_irq = irq;

	for (i = 0; i < RC5T583_MAX_IRQS; i++) {
		int __irq = i + rc5t583->irq_base;
		irq_set_chip_data(__irq, rc5t583);
		irq_set_chip_and_handler(__irq, &rc5t583_irq_chip,
					 handle_simple_irq);
		irq_set_nested_thread(__irq, 1);
#ifdef CONFIG_ARM
		set_irq_flags(__irq, IRQF_VALID);
#endif
	}

	ret = request_threaded_irq(irq, NULL, rc5t583_irq, IRQF_ONESHOT,
				"rc5t583", rc5t583);
	if (ret < 0)
		dev_err(rc5t583->dev,
			"Error in registering interrupt error: %d\n", ret);
	return ret;
}

int rc5t583_irq_exit(struct rc5t583 *rc5t583)
{
	if (rc5t583->chip_irq)
		free_irq(rc5t583->chip_irq, rc5t583);
	return 0;
}
Commit	Line	Data
1b1247dd LD	1	/*
	2	* Interrupt driver for RICOH583 power management chip.
	3	*
	4	* Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
	5	* Author: Laxman dewangan <ldewangan@nvidia.com>
	6	*
	7	* based on code
	8	* Copyright (C) 2011 RICOH COMPANY,LTD
	9	*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms and conditions of the GNU General Public License,
	12	* version 2, as published by the Free Software Foundation.
	13	*
	14	* This program is distributed in the hope it will be useful, but WITHOUT
	15	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	16	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	17	* more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	21	*
	22	*/
	23	#include <linux/interrupt.h>
	24	#include <linux/irq.h>
	25	#include <linux/init.h>
	26	#include <linux/i2c.h>
	27	#include <linux/mfd/rc5t583.h>
	28
	29	enum int_type {
	30	SYS_INT = 0x1,
	31	DCDC_INT = 0x2,
	32	RTC_INT = 0x4,
	33	ADC_INT = 0x8,
	34	GPIO_INT = 0x10,
	35	};
	36
	37	static int gpedge_add[] = {
	38	RC5T583_GPIO_GPEDGE2,
	39	RC5T583_GPIO_GPEDGE2
	40	};
	41
	42	static int irq_en_add[] = {
	43	RC5T583_INT_EN_SYS1,
	44	RC5T583_INT_EN_SYS2,
	45	RC5T583_INT_EN_DCDC,
	46	RC5T583_INT_EN_RTC,
	47	RC5T583_INT_EN_ADC1,
	48	RC5T583_INT_EN_ADC2,
	49	RC5T583_INT_EN_ADC3,
	50	RC5T583_GPIO_EN_INT
	51	};
	52
	53	static int irq_mon_add[] = {
	54	RC5T583_INT_MON_SYS1,
	55	RC5T583_INT_MON_SYS2,
	56	RC5T583_INT_MON_DCDC,
	57	RC5T583_INT_MON_RTC,
	58	RC5T583_INT_IR_ADCL,
	59	RC5T583_INT_IR_ADCH,
	60	RC5T583_INT_IR_ADCEND,
	61	RC5T583_INT_IR_GPIOF,
	62	RC5T583_INT_IR_GPIOR
	63	};
	64
65	static int irq_clr_add[] = {
66	RC5T583_INT_IR_SYS1,
67	RC5T583_INT_IR_SYS2,
68	RC5T583_INT_IR_DCDC,
69	RC5T583_INT_IR_RTC,
70	RC5T583_INT_IR_ADCL,
71	RC5T583_INT_IR_ADCH,
72	RC5T583_INT_IR_ADCEND,
73	RC5T583_INT_IR_GPIOF,
74	RC5T583_INT_IR_GPIOR
75	};
76
77	static int main_int_type[] = {
78	SYS_INT,
79	SYS_INT,
80	DCDC_INT,
81	RTC_INT,
82	ADC_INT,
83	ADC_INT,
84	ADC_INT,
85	GPIO_INT,
86	GPIO_INT,
87	};
88
89	struct rc5t583_irq_data {
90	u8 int_type;
91	u8 master_bit;
92	u8 int_en_bit;
93	u8 mask_reg_index;
94	int grp_index;
95	};
96
97	#define RC5T583_IRQ(_int_type, _master_bit, _grp_index, \
98	_int_bit, _mask_ind) \
99	{ \
100	.int_type = _int_type, \
101	.master_bit = _master_bit, \
102	.grp_index = _grp_index, \
103	.int_en_bit = _int_bit, \
104	.mask_reg_index = _mask_ind, \
105	}
106
107	static const struct rc5t583_irq_data rc5t583_irqs[RC5T583_MAX_IRQS] = {
108	[RC5T583_IRQ_ONKEY] = RC5T583_IRQ(SYS_INT, 0, 0, 0, 0),
109	[RC5T583_IRQ_ACOK] = RC5T583_IRQ(SYS_INT, 0, 1, 1, 0),
110	[RC5T583_IRQ_LIDOPEN] = RC5T583_IRQ(SYS_INT, 0, 2, 2, 0),
111	[RC5T583_IRQ_PREOT] = RC5T583_IRQ(SYS_INT, 0, 3, 3, 0),
112	[RC5T583_IRQ_CLKSTP] = RC5T583_IRQ(SYS_INT, 0, 4, 4, 0),
113	[RC5T583_IRQ_ONKEY_OFF] = RC5T583_IRQ(SYS_INT, 0, 5, 5, 0),
114	[RC5T583_IRQ_WD] = RC5T583_IRQ(SYS_INT, 0, 7, 7, 0),
115	[RC5T583_IRQ_EN_PWRREQ1] = RC5T583_IRQ(SYS_INT, 0, 8, 0, 1),
116	[RC5T583_IRQ_EN_PWRREQ2] = RC5T583_IRQ(SYS_INT, 0, 9, 1, 1),
117	[RC5T583_IRQ_PRE_VINDET] = RC5T583_IRQ(SYS_INT, 0, 10, 2, 1),
118
119	[RC5T583_IRQ_DC0LIM] = RC5T583_IRQ(DCDC_INT, 1, 0, 0, 2),
120	[RC5T583_IRQ_DC1LIM] = RC5T583_IRQ(DCDC_INT, 1, 1, 1, 2),
121	[RC5T583_IRQ_DC2LIM] = RC5T583_IRQ(DCDC_INT, 1, 2, 2, 2),
122	[RC5T583_IRQ_DC3LIM] = RC5T583_IRQ(DCDC_INT, 1, 3, 3, 2),
123
124	[RC5T583_IRQ_CTC] = RC5T583_IRQ(RTC_INT, 2, 0, 0, 3),
125	[RC5T583_IRQ_YALE] = RC5T583_IRQ(RTC_INT, 2, 5, 5, 3),
126	[RC5T583_IRQ_DALE] = RC5T583_IRQ(RTC_INT, 2, 6, 6, 3),
127	[RC5T583_IRQ_WALE] = RC5T583_IRQ(RTC_INT, 2, 7, 7, 3),
128
129	[RC5T583_IRQ_AIN1L] = RC5T583_IRQ(ADC_INT, 3, 0, 0, 4),
130	[RC5T583_IRQ_AIN2L] = RC5T583_IRQ(ADC_INT, 3, 1, 1, 4),
131	[RC5T583_IRQ_AIN3L] = RC5T583_IRQ(ADC_INT, 3, 2, 2, 4),
132	[RC5T583_IRQ_VBATL] = RC5T583_IRQ(ADC_INT, 3, 3, 3, 4),
133	[RC5T583_IRQ_VIN3L] = RC5T583_IRQ(ADC_INT, 3, 4, 4, 4),
134	[RC5T583_IRQ_VIN8L] = RC5T583_IRQ(ADC_INT, 3, 5, 5, 4),
135	[RC5T583_IRQ_AIN1H] = RC5T583_IRQ(ADC_INT, 3, 6, 0, 5),
136	[RC5T583_IRQ_AIN2H] = RC5T583_IRQ(ADC_INT, 3, 7, 1, 5),
137	[RC5T583_IRQ_AIN3H] = RC5T583_IRQ(ADC_INT, 3, 8, 2, 5),
138	[RC5T583_IRQ_VBATH] = RC5T583_IRQ(ADC_INT, 3, 9, 3, 5),
139	[RC5T583_IRQ_VIN3H] = RC5T583_IRQ(ADC_INT, 3, 10, 4, 5),
140	[RC5T583_IRQ_VIN8H] = RC5T583_IRQ(ADC_INT, 3, 11, 5, 5),
141	[RC5T583_IRQ_ADCEND] = RC5T583_IRQ(ADC_INT, 3, 12, 0, 6),
142
143	[RC5T583_IRQ_GPIO0] = RC5T583_IRQ(GPIO_INT, 4, 0, 0, 7),
144	[RC5T583_IRQ_GPIO1] = RC5T583_IRQ(GPIO_INT, 4, 1, 1, 7),
145	[RC5T583_IRQ_GPIO2] = RC5T583_IRQ(GPIO_INT, 4, 2, 2, 7),
146	[RC5T583_IRQ_GPIO3] = RC5T583_IRQ(GPIO_INT, 4, 3, 3, 7),
147	[RC5T583_IRQ_GPIO4] = RC5T583_IRQ(GPIO_INT, 4, 4, 4, 7),
148	[RC5T583_IRQ_GPIO5] = RC5T583_IRQ(GPIO_INT, 4, 5, 5, 7),
149	[RC5T583_IRQ_GPIO6] = RC5T583_IRQ(GPIO_INT, 4, 6, 6, 7),
150	[RC5T583_IRQ_GPIO7] = RC5T583_IRQ(GPIO_INT, 4, 7, 7, 7),
151	};
152
153	static void rc5t583_irq_lock(struct irq_data *irq_data)
154	{
155	struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
156	mutex_lock(&rc5t583->irq_lock);
157	}
158
159	static void rc5t583_irq_unmask(struct irq_data *irq_data)
160	{
161	struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
162	unsigned int __irq = irq_data->irq - rc5t583->irq_base;
163	const struct rc5t583_irq_data *data = &rc5t583_irqs[__irq];
164
165	rc5t583->group_irq_en[data->grp_index] \|= 1 << data->grp_index;
166	rc5t583->intc_inten_reg \|= 1 << data->master_bit;
167	rc5t583->irq_en_reg[data->mask_reg_index] \|= 1 << data->int_en_bit;
168	}
169
170	static void rc5t583_irq_mask(struct irq_data *irq_data)
171	{
172	struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
173	unsigned int __irq = irq_data->irq - rc5t583->irq_base;
174	const struct rc5t583_irq_data *data = &rc5t583_irqs[__irq];
175
176	rc5t583->group_irq_en[data->grp_index] &= ~(1 << data->grp_index);
177	if (!rc5t583->group_irq_en[data->grp_index])
178	rc5t583->intc_inten_reg &= ~(1 << data->master_bit);
179
180	rc5t583->irq_en_reg[data->mask_reg_index] &= ~(1 << data->int_en_bit);
181	}
182
183	static int rc5t583_irq_set_type(struct irq_data *irq_data, unsigned int type)
184	{
185	struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
186	unsigned int __irq = irq_data->irq - rc5t583->irq_base;
187	const struct rc5t583_irq_data *data = &rc5t583_irqs[__irq];
188	int val = 0;
189	int gpedge_index;
190	int gpedge_bit_pos;
191
192	/* Supporting only trigger level inetrrupt */
193	if ((data->int_type & GPIO_INT) && (type & IRQ_TYPE_EDGE_BOTH)) {
194	gpedge_index = data->int_en_bit / 4;
195	gpedge_bit_pos = data->int_en_bit % 4;
196
197	if (type & IRQ_TYPE_EDGE_FALLING)
198	val \|= 0x2;
199
200	if (type & IRQ_TYPE_EDGE_RISING)
201	val \|= 0x1;
202
203	rc5t583->gpedge_reg[gpedge_index] &= ~(3 << gpedge_bit_pos);
204	rc5t583->gpedge_reg[gpedge_index] \|= (val << gpedge_bit_pos);
205	rc5t583_irq_unmask(irq_data);
206	return 0;
207	}
208	return -EINVAL;
209	}
210
211	static void rc5t583_irq_sync_unlock(struct irq_data *irq_data)
212	{
213	struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
214	int i;
215	int ret;
216
217	for (i = 0; i < ARRAY_SIZE(rc5t583->gpedge_reg); i++) {
218	ret = rc5t583_write(rc5t583->dev, gpedge_add[i],
219	rc5t583->gpedge_reg[i]);
220	if (ret < 0)
221	dev_warn(rc5t583->dev,
222	"Error in writing reg 0x%02x error: %d\n",
223	gpedge_add[i], ret);
224	}
225
226	for (i = 0; i < ARRAY_SIZE(rc5t583->irq_en_reg); i++) {
227	ret = rc5t583_write(rc5t583->dev, irq_en_add[i],
228	rc5t583->irq_en_reg[i]);
229	if (ret < 0)
230	dev_warn(rc5t583->dev,
231	"Error in writing reg 0x%02x error: %d\n",
232	irq_en_add[i], ret);
233	}
234
235	ret = rc5t583_write(rc5t583->dev, RC5T583_INTC_INTEN,
236	rc5t583->intc_inten_reg);
237	if (ret < 0)
238	dev_warn(rc5t583->dev,
239	"Error in writing reg 0x%02x error: %d\n",
240	RC5T583_INTC_INTEN, ret);
241
242	mutex_unlock(&rc5t583->irq_lock);
243	}
244	#ifdef CONFIG_PM_SLEEP
245	static int rc5t583_irq_set_wake(struct irq_data *irq_data, unsigned int on)
246	{
247	struct rc5t583 *rc5t583 = irq_data_get_irq_chip_data(irq_data);
248	return irq_set_irq_wake(rc5t583->chip_irq, on);
249	}
250	#else
251	#define rc5t583_irq_set_wake NULL
252	#endif
253
254	static irqreturn_t rc5t583_irq(int irq, void *data)
255	{
256	struct rc5t583 *rc5t583 = data;
257	uint8_t int_sts[RC5T583_MAX_INTERRUPT_MASK_REGS];
258	uint8_t master_int;
259	int i;
260	int ret;
261	unsigned int rtc_int_sts = 0;
262
263	/* Clear the status */
264	for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; i++)
265	int_sts[i] = 0;
266
267	ret = rc5t583_read(rc5t583->dev, RC5T583_INTC_INTMON, &master_int);
268	if (ret < 0) {
269	dev_err(rc5t583->dev,
270	"Error in reading reg 0x%02x error: %d\n",
271	RC5T583_INTC_INTMON, ret);
272	return IRQ_HANDLED;
273	}
274
275	for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; ++i) {
276	if (!(master_int & main_int_type[i]))
277	continue;
278
279	ret = rc5t583_read(rc5t583->dev, irq_mon_add[i], &int_sts[i]);
280	if (ret < 0) {
281	dev_warn(rc5t583->dev,
282	"Error in reading reg 0x%02x error: %d\n",
283	irq_mon_add[i], ret);
284	int_sts[i] = 0;
285	continue;
286	}
287
288	if (main_int_type[i] & RTC_INT) {
289	rtc_int_sts = 0;
290	if (int_sts[i] & 0x1)
291	rtc_int_sts \|= BIT(6);
292	if (int_sts[i] & 0x2)
293	rtc_int_sts \|= BIT(7);
294	if (int_sts[i] & 0x4)
295	rtc_int_sts \|= BIT(0);
296	if (int_sts[i] & 0x8)
297	rtc_int_sts \|= BIT(5);
298	}
299
300	ret = rc5t583_write(rc5t583->dev, irq_clr_add[i],
301	~int_sts[i]);
302	if (ret < 0)
303	dev_warn(rc5t583->dev,
304	"Error in reading reg 0x%02x error: %d\n",
305	irq_clr_add[i], ret);
306
307	if (main_int_type[i] & RTC_INT)
308	int_sts[i] = rtc_int_sts;
309	}
310
311	/* Merge gpio interrupts for rising and falling case*/
312	int_sts[7] \|= int_sts[8];
313
314	/* Call interrupt handler if enabled */
315	for (i = 0; i < RC5T583_MAX_IRQS; ++i) {
316	const struct rc5t583_irq_data *data = &rc5t583_irqs[i];
317	if ((int_sts[data->mask_reg_index] & (1 << data->int_en_bit)) &&
318	(rc5t583->group_irq_en[data->master_bit] &
319	(1 << data->grp_index)))
320	handle_nested_irq(rc5t583->irq_base + i);
321	}
322
323	return IRQ_HANDLED;
324	}
325
326	static struct irq_chip rc5t583_irq_chip = {
327	.name = "rc5t583-irq",
328	.irq_mask = rc5t583_irq_mask,
329	.irq_unmask = rc5t583_irq_unmask,
330	.irq_bus_lock = rc5t583_irq_lock,
331	.irq_bus_sync_unlock = rc5t583_irq_sync_unlock,
332	.irq_set_type = rc5t583_irq_set_type,
333	.irq_set_wake = rc5t583_irq_set_wake,
334	};
335
336	int rc5t583_irq_init(struct rc5t583 *rc5t583, int irq, int irq_base)
337	{
338	int i, ret;
339
340	if (!irq_base) {
341	dev_warn(rc5t583->dev, "No interrupt support on IRQ base\n");
342	return -EINVAL;
343	}
344
345	mutex_init(&rc5t583->irq_lock);
346
347	/* Initailize all int register to 0 */
348	for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; i++) {
349	ret = rc5t583_write(rc5t583->dev, irq_en_add[i],
350	rc5t583->irq_en_reg[i]);
351	if (ret < 0)
352	dev_warn(rc5t583->dev,
353	"Error in writing reg 0x%02x error: %d\n",
354	irq_en_add[i], ret);
355	}
356
357	for (i = 0; i < RC5T583_MAX_GPEDGE_REG; i++) {
358	ret = rc5t583_write(rc5t583->dev, gpedge_add[i],
359	rc5t583->gpedge_reg[i]);
360	if (ret < 0)
361	dev_warn(rc5t583->dev,
362	"Error in writing reg 0x%02x error: %d\n",
363	gpedge_add[i], ret);
364	}
365
366	ret = rc5t583_write(rc5t583->dev, RC5T583_INTC_INTEN, 0x0);
367	if (ret < 0)
368	dev_warn(rc5t583->dev,
369	"Error in writing reg 0x%02x error: %d\n",
370	RC5T583_INTC_INTEN, ret);
371
372	/* Clear all interrupts in case they woke up active. */
373	for (i = 0; i < RC5T583_MAX_INTERRUPT_MASK_REGS; i++) {
374	ret = rc5t583_write(rc5t583->dev, irq_clr_add[i], 0);
375	if (ret < 0)
376	dev_warn(rc5t583->dev,
377	"Error in writing reg 0x%02x error: %d\n",
378	irq_clr_add[i], ret);
379	}
380
381	rc5t583->irq_base = irq_base;
382	rc5t583->chip_irq = irq;
383
384	for (i = 0; i < RC5T583_MAX_IRQS; i++) {
385	int __irq = i + rc5t583->irq_base;
386	irq_set_chip_data(__irq, rc5t583);
387	irq_set_chip_and_handler(__irq, &rc5t583_irq_chip,
388	handle_simple_irq);
389	irq_set_nested_thread(__irq, 1);
390	#ifdef CONFIG_ARM
391	set_irq_flags(__irq, IRQF_VALID);
392	#endif
393	}
394
395	ret = request_threaded_irq(irq, NULL, rc5t583_irq, IRQF_ONESHOT,
396	"rc5t583", rc5t583);
397	if (ret < 0)
398	dev_err(rc5t583->dev,
399	"Error in registering interrupt error: %d\n", ret);
400	return ret;
401	}
402
403	int rc5t583_irq_exit(struct rc5t583 *rc5t583)
404	{
405	if (rc5t583->chip_irq)
406	free_irq(rc5t583->chip_irq, rc5t583);
407	return 0;
408	}