drivers/mfd/s5m-irq.c - kernel/msm-4.9 - Gitiles

 /*
  * s5m-irq.c
  *
  * Copyright (c) 2011 Samsung Electronics Co., Ltd
  *              http://www.samsung.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/device.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/mfd/s5m87xx/s5m-core.h>

 struct s5m_irq_data {
 	int reg;
 	int mask;
 };

 static struct s5m_irq_data s5m8767_irqs[] = {
 	[S5M8767_IRQ_PWRR] = {
 		.reg = 1,
 		.mask = S5M8767_IRQ_PWRR_MASK,
 	},
 	[S5M8767_IRQ_PWRF] = {
 		.reg = 1,
 		.mask = S5M8767_IRQ_PWRF_MASK,
 	},
 	[S5M8767_IRQ_PWR1S] = {
 		.reg = 1,
 		.mask = S5M8767_IRQ_PWR1S_MASK,
 	},
 	[S5M8767_IRQ_JIGR] = {
 		.reg = 1,
 		.mask = S5M8767_IRQ_JIGR_MASK,
 	},
 	[S5M8767_IRQ_JIGF] = {
 		.reg = 1,
 		.mask = S5M8767_IRQ_JIGF_MASK,
 	},
 	[S5M8767_IRQ_LOWBAT2] = {
 		.reg = 1,
 		.mask = S5M8767_IRQ_LOWBAT2_MASK,
 	},
 	[S5M8767_IRQ_LOWBAT1] = {
 		.reg = 1,
 		.mask = S5M8767_IRQ_LOWBAT1_MASK,
 	},
 	[S5M8767_IRQ_MRB] = {
 		.reg = 2,
 		.mask = S5M8767_IRQ_MRB_MASK,
 	},
 	[S5M8767_IRQ_DVSOK2] = {
 		.reg = 2,
 		.mask = S5M8767_IRQ_DVSOK2_MASK,
 	},
 	[S5M8767_IRQ_DVSOK3] = {
 		.reg = 2,
 		.mask = S5M8767_IRQ_DVSOK3_MASK,
 	},
 	[S5M8767_IRQ_DVSOK4] = {
 		.reg = 2,
 		.mask = S5M8767_IRQ_DVSOK4_MASK,
 	},
 	[S5M8767_IRQ_RTC60S] = {
 		.reg = 3,
 		.mask = S5M8767_IRQ_RTC60S_MASK,
 	},
 	[S5M8767_IRQ_RTCA1] = {
 		.reg = 3,
 		.mask = S5M8767_IRQ_RTCA1_MASK,
 	},
 	[S5M8767_IRQ_RTCA2] = {
 		.reg = 3,
 		.mask = S5M8767_IRQ_RTCA2_MASK,
 	},
 	[S5M8767_IRQ_SMPL] = {
 		.reg = 3,
 		.mask = S5M8767_IRQ_SMPL_MASK,
 	},
 	[S5M8767_IRQ_RTC1S] = {
 		.reg = 3,
 		.mask = S5M8767_IRQ_RTC1S_MASK,
 	},
 	[S5M8767_IRQ_WTSR] = {
 		.reg = 3,
 		.mask = S5M8767_IRQ_WTSR_MASK,
 	},
 };

 static struct s5m_irq_data s5m8763_irqs[] = {
 	[S5M8763_IRQ_DCINF] = {
 		.reg = 1,
 		.mask = S5M8763_IRQ_DCINF_MASK,
 	},
 	[S5M8763_IRQ_DCINR] = {
 		.reg = 1,
 		.mask = S5M8763_IRQ_DCINR_MASK,
 	},
 	[S5M8763_IRQ_JIGF] = {
 		.reg = 1,
 		.mask = S5M8763_IRQ_JIGF_MASK,
 	},
 	[S5M8763_IRQ_JIGR] = {
 		.reg = 1,
 		.mask = S5M8763_IRQ_JIGR_MASK,
 	},
 	[S5M8763_IRQ_PWRONF] = {
 		.reg = 1,
 		.mask = S5M8763_IRQ_PWRONF_MASK,
 	},
 	[S5M8763_IRQ_PWRONR] = {
 		.reg = 1,
 		.mask = S5M8763_IRQ_PWRONR_MASK,
 	},
 	[S5M8763_IRQ_WTSREVNT] = {
 		.reg = 2,
 		.mask = S5M8763_IRQ_WTSREVNT_MASK,
 	},
 	[S5M8763_IRQ_SMPLEVNT] = {
 		.reg = 2,
 		.mask = S5M8763_IRQ_SMPLEVNT_MASK,
 	},
 	[S5M8763_IRQ_ALARM1] = {
 		.reg = 2,
 		.mask = S5M8763_IRQ_ALARM1_MASK,
 	},
 	[S5M8763_IRQ_ALARM0] = {
 		.reg = 2,
 		.mask = S5M8763_IRQ_ALARM0_MASK,
 	},
 	[S5M8763_IRQ_ONKEY1S] = {
 		.reg = 3,
 		.mask = S5M8763_IRQ_ONKEY1S_MASK,
 	},
 	[S5M8763_IRQ_TOPOFFR] = {
 		.reg = 3,
 		.mask = S5M8763_IRQ_TOPOFFR_MASK,
 	},
 	[S5M8763_IRQ_DCINOVPR] = {
 		.reg = 3,
 		.mask = S5M8763_IRQ_DCINOVPR_MASK,
 	},
 	[S5M8763_IRQ_CHGRSTF] = {
 		.reg = 3,
 		.mask = S5M8763_IRQ_CHGRSTF_MASK,
 	},
 	[S5M8763_IRQ_DONER] = {
 		.reg = 3,
 		.mask = S5M8763_IRQ_DONER_MASK,
 	},
 	[S5M8763_IRQ_CHGFAULT] = {
 		.reg = 3,
 		.mask = S5M8763_IRQ_CHGFAULT_MASK,
 	},
 	[S5M8763_IRQ_LOBAT1] = {
 		.reg = 4,
 		.mask = S5M8763_IRQ_LOBAT1_MASK,
 	},
 	[S5M8763_IRQ_LOBAT2] = {
 		.reg = 4,
 		.mask = S5M8763_IRQ_LOBAT2_MASK,
 	},
 };

 static inline struct s5m_irq_data *
 irq_to_s5m8767_irq(struct s5m87xx_dev *s5m87xx, int irq)
 {
 	return &s5m8767_irqs[irq - s5m87xx->irq_base];
 }

 static void s5m8767_irq_lock(struct irq_data *data)
 {
 	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);

 	mutex_lock(&s5m87xx->irqlock);
 }

 static void s5m8767_irq_sync_unlock(struct irq_data *data)
 {
 	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);
 	int i;

 	for (i = 0; i < ARRAY_SIZE(s5m87xx->irq_masks_cur); i++) {
 		if (s5m87xx->irq_masks_cur[i] != s5m87xx->irq_masks_cache[i]) {
 			s5m87xx->irq_masks_cache[i] = s5m87xx->irq_masks_cur[i];
 			s5m_reg_write(s5m87xx, S5M8767_REG_INT1M + i,
 					s5m87xx->irq_masks_cur[i]);
 		}
 	}

 	mutex_unlock(&s5m87xx->irqlock);
 }

 static void s5m8767_irq_unmask(struct irq_data *data)
 {
 	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);
 	struct s5m_irq_data *irq_data = irq_to_s5m8767_irq(s5m87xx,
 							       data->irq);

 	s5m87xx->irq_masks_cur[irq_data->reg - 1] &= ~irq_data->mask;
 }

 static void s5m8767_irq_mask(struct irq_data *data)
 {
 	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);
 	struct s5m_irq_data *irq_data = irq_to_s5m8767_irq(s5m87xx,
 							       data->irq);

 	s5m87xx->irq_masks_cur[irq_data->reg - 1] |= irq_data->mask;
 }

 static struct irq_chip s5m8767_irq_chip = {
 	.name = "s5m8767",
 	.irq_bus_lock = s5m8767_irq_lock,
 	.irq_bus_sync_unlock = s5m8767_irq_sync_unlock,
 	.irq_mask = s5m8767_irq_mask,
 	.irq_unmask = s5m8767_irq_unmask,
 };

 static inline struct s5m_irq_data *
 irq_to_s5m8763_irq(struct s5m87xx_dev *s5m87xx, int irq)
 {
 	return &s5m8763_irqs[irq - s5m87xx->irq_base];
 }

 static void s5m8763_irq_lock(struct irq_data *data)
 {
 	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);

 	mutex_lock(&s5m87xx->irqlock);
 }

 static void s5m8763_irq_sync_unlock(struct irq_data *data)
 {
 	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);
 	int i;

 	for (i = 0; i < ARRAY_SIZE(s5m87xx->irq_masks_cur); i++) {
 		if (s5m87xx->irq_masks_cur[i] != s5m87xx->irq_masks_cache[i]) {
 			s5m87xx->irq_masks_cache[i] = s5m87xx->irq_masks_cur[i];
 			s5m_reg_write(s5m87xx, S5M8763_REG_IRQM1 + i,
 					s5m87xx->irq_masks_cur[i]);
 		}
 	}

 	mutex_unlock(&s5m87xx->irqlock);
 }

 static void s5m8763_irq_unmask(struct irq_data *data)
 {
 	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);
 	struct s5m_irq_data *irq_data = irq_to_s5m8763_irq(s5m87xx,
 							       data->irq);

 	s5m87xx->irq_masks_cur[irq_data->reg - 1] &= ~irq_data->mask;
 }

 static void s5m8763_irq_mask(struct irq_data *data)
 {
 	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);
 	struct s5m_irq_data *irq_data = irq_to_s5m8763_irq(s5m87xx,
 							       data->irq);

 	s5m87xx->irq_masks_cur[irq_data->reg - 1] |= irq_data->mask;
 }

 static struct irq_chip s5m8763_irq_chip = {
 	.name = "s5m8763",
 	.irq_bus_lock = s5m8763_irq_lock,
 	.irq_bus_sync_unlock = s5m8763_irq_sync_unlock,
 	.irq_mask = s5m8763_irq_mask,
 	.irq_unmask = s5m8763_irq_unmask,
 };


 static irqreturn_t s5m8767_irq_thread(int irq, void *data)
 {
 	struct s5m87xx_dev *s5m87xx = data;
 	u8 irq_reg[NUM_IRQ_REGS-1];
 	int ret;
 	int i;


 	ret = s5m_bulk_read(s5m87xx, S5M8767_REG_INT1,
 				NUM_IRQ_REGS - 1, irq_reg);
 	if (ret < 0) {
 		dev_err(s5m87xx->dev, "Failed to read interrupt register: %d\n",
 				ret);
 		return IRQ_NONE;
 	}

 	for (i = 0; i < NUM_IRQ_REGS - 1; i++)
 		irq_reg[i] &= ~s5m87xx->irq_masks_cur[i];

 	for (i = 0; i < S5M8767_IRQ_NR; i++) {
 		if (irq_reg[s5m8767_irqs[i].reg - 1] & s5m8767_irqs[i].mask)
 			handle_nested_irq(s5m87xx->irq_base + i);
 	}

 	return IRQ_HANDLED;
 }

 static irqreturn_t s5m8763_irq_thread(int irq, void *data)
 {
 	struct s5m87xx_dev *s5m87xx = data;
 	u8 irq_reg[NUM_IRQ_REGS];
 	int ret;
 	int i;

 	ret = s5m_bulk_read(s5m87xx, S5M8763_REG_IRQ1,
 				NUM_IRQ_REGS, irq_reg);
 	if (ret < 0) {
 		dev_err(s5m87xx->dev, "Failed to read interrupt register: %d\n",
 				ret);
 		return IRQ_NONE;
 	}

 	for (i = 0; i < NUM_IRQ_REGS; i++)
 		irq_reg[i] &= ~s5m87xx->irq_masks_cur[i];

 	for (i = 0; i < S5M8763_IRQ_NR; i++) {
 		if (irq_reg[s5m8763_irqs[i].reg - 1] & s5m8763_irqs[i].mask)
 			handle_nested_irq(s5m87xx->irq_base + i);
 	}

 	return IRQ_HANDLED;
 }

 int s5m_irq_resume(struct s5m87xx_dev *s5m87xx)
 {
 	if (s5m87xx->irq && s5m87xx->irq_base){
 		switch (s5m87xx->device_type) {
 		case S5M8763X:
 			s5m8763_irq_thread(s5m87xx->irq_base, s5m87xx);
 			break;
 		case S5M8767X:
 			s5m8767_irq_thread(s5m87xx->irq_base, s5m87xx);
 			break;
 		default:
 			dev_err(s5m87xx->dev,
 				"Unknown device type %d\n",
 				s5m87xx->device_type);
 			return -EINVAL;

 		}
 	}
 	return 0;
 }

 int s5m_irq_init(struct s5m87xx_dev *s5m87xx)
 {
 	int i;
 	int cur_irq;
 	int ret = 0;
 	int type = s5m87xx->device_type;

 	if (!s5m87xx->irq) {
 		dev_warn(s5m87xx->dev,
 			 "No interrupt specified, no interrupts\n");
 		s5m87xx->irq_base = 0;
 		return 0;
 	}

 	if (!s5m87xx->irq_base) {
 		dev_err(s5m87xx->dev,
 			"No interrupt base specified, no interrupts\n");
 		return 0;
 	}

 	mutex_init(&s5m87xx->irqlock);

 	switch (type) {
 	case S5M8763X:
 		for (i = 0; i < NUM_IRQ_REGS; i++) {
 			s5m87xx->irq_masks_cur[i] = 0xff;
 			s5m87xx->irq_masks_cache[i] = 0xff;
 			s5m_reg_write(s5m87xx, S5M8763_REG_IRQM1 + i,
 						0xff);
 		}

 		s5m_reg_write(s5m87xx, S5M8763_REG_STATUSM1, 0xff);
 		s5m_reg_write(s5m87xx, S5M8763_REG_STATUSM2, 0xff);

 		for (i = 0; i < S5M8763_IRQ_NR; i++) {
 			cur_irq = i + s5m87xx->irq_base;
 			irq_set_chip_data(cur_irq, s5m87xx);
 			irq_set_chip_and_handler(cur_irq, &s5m8763_irq_chip,
 						 handle_edge_irq);
 			irq_set_nested_thread(cur_irq, 1);
 #ifdef CONFIG_ARM
 			set_irq_flags(cur_irq, IRQF_VALID);
 #else
 			irq_set_noprobe(cur_irq);
 #endif
 		}

 		ret = request_threaded_irq(s5m87xx->irq, NULL,
 					s5m8763_irq_thread,
 					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
 					"s5m87xx-irq", s5m87xx);
 		if (ret) {
 			dev_err(s5m87xx->dev, "Failed to request IRQ %d: %d\n",
 				s5m87xx->irq, ret);
 			return ret;
 		}
 		break;
 	case S5M8767X:
 		for (i = 0; i < NUM_IRQ_REGS - 1; i++) {
 			s5m87xx->irq_masks_cur[i] = 0xff;
 			s5m87xx->irq_masks_cache[i] = 0xff;
 			s5m_reg_write(s5m87xx, S5M8767_REG_INT1M + i,
 						0xff);
 		}
 		for (i = 0; i < S5M8767_IRQ_NR; i++) {
 			cur_irq = i + s5m87xx->irq_base;
 			irq_set_chip_data(cur_irq, s5m87xx);
 			if (ret) {
 				dev_err(s5m87xx->dev,
 					"Failed to irq_set_chip_data %d: %d\n",
 					s5m87xx->irq, ret);
 				return ret;
 			}

 			irq_set_chip_and_handler(cur_irq, &s5m8767_irq_chip,
 						 handle_edge_irq);
 			irq_set_nested_thread(cur_irq, 1);
 #ifdef CONFIG_ARM
 			set_irq_flags(cur_irq, IRQF_VALID);
 #else
 			irq_set_noprobe(cur_irq);
 #endif
 		}

 		ret = request_threaded_irq(s5m87xx->irq, NULL,
 					   s5m8767_irq_thread,
 					   IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
 					   "s5m87xx-irq", s5m87xx);
 		if (ret) {
 			dev_err(s5m87xx->dev, "Failed to request IRQ %d: %d\n",
 				s5m87xx->irq, ret);
 			return ret;
 		}
 		break;
 	default:
 		dev_err(s5m87xx->dev,
 			"Unknown device type %d\n", s5m87xx->device_type);
 		return -EINVAL;
 	}

 	if (!s5m87xx->ono)
 		return 0;

 	switch (type) {
 	case S5M8763X:
 		ret = request_threaded_irq(s5m87xx->ono, NULL,
 						s5m8763_irq_thread,
 						IRQF_TRIGGER_FALLING |
 						IRQF_TRIGGER_RISING |
 						IRQF_ONESHOT, "s5m87xx-ono",
 						s5m87xx);
 		break;
 	case S5M8767X:
 		ret = request_threaded_irq(s5m87xx->ono, NULL,
 					s5m8767_irq_thread,
 					IRQF_TRIGGER_FALLING |
 					IRQF_TRIGGER_RISING |
 					IRQF_ONESHOT, "s5m87xx-ono", s5m87xx);
 		break;
 	default:
 		ret = -EINVAL;
 		break;
 	}

 	if (ret) {
 		dev_err(s5m87xx->dev, "Failed to request IRQ %d: %d\n",
 			s5m87xx->ono, ret);
 		return ret;
 	}

 	return 0;
 }

 void s5m_irq_exit(struct s5m87xx_dev *s5m87xx)
 {
 	if (s5m87xx->ono)
 		free_irq(s5m87xx->ono, s5m87xx);

 	if (s5m87xx->irq)
 		free_irq(s5m87xx->irq, s5m87xx);
 }
	/*
	* s5m-irq.c
	*
	* Copyright (c) 2011 Samsung Electronics Co., Ltd
	* http://www.samsung.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/device.h>
	#include <linux/interrupt.h>
	#include <linux/irq.h>
	#include <linux/mfd/s5m87xx/s5m-core.h>

	struct s5m_irq_data {
	int reg;
	int mask;
	};

	static struct s5m_irq_data s5m8767_irqs[] = {
	[S5M8767_IRQ_PWRR] = {
	.reg = 1,
	.mask = S5M8767_IRQ_PWRR_MASK,
	},
	[S5M8767_IRQ_PWRF] = {
	.reg = 1,
	.mask = S5M8767_IRQ_PWRF_MASK,
	},
	[S5M8767_IRQ_PWR1S] = {
	.reg = 1,
	.mask = S5M8767_IRQ_PWR1S_MASK,
	},
	[S5M8767_IRQ_JIGR] = {
	.reg = 1,
	.mask = S5M8767_IRQ_JIGR_MASK,
	},
	[S5M8767_IRQ_JIGF] = {
	.reg = 1,
	.mask = S5M8767_IRQ_JIGF_MASK,
	},
	[S5M8767_IRQ_LOWBAT2] = {
	.reg = 1,
	.mask = S5M8767_IRQ_LOWBAT2_MASK,
	},
	[S5M8767_IRQ_LOWBAT1] = {
	.reg = 1,
	.mask = S5M8767_IRQ_LOWBAT1_MASK,
	},
	[S5M8767_IRQ_MRB] = {
	.reg = 2,
	.mask = S5M8767_IRQ_MRB_MASK,
	},
	[S5M8767_IRQ_DVSOK2] = {
	.reg = 2,
	.mask = S5M8767_IRQ_DVSOK2_MASK,
	},
	[S5M8767_IRQ_DVSOK3] = {
	.reg = 2,
	.mask = S5M8767_IRQ_DVSOK3_MASK,
	},
	[S5M8767_IRQ_DVSOK4] = {
	.reg = 2,
	.mask = S5M8767_IRQ_DVSOK4_MASK,
	},
	[S5M8767_IRQ_RTC60S] = {
	.reg = 3,
	.mask = S5M8767_IRQ_RTC60S_MASK,
	},
	[S5M8767_IRQ_RTCA1] = {
	.reg = 3,
	.mask = S5M8767_IRQ_RTCA1_MASK,
	},
	[S5M8767_IRQ_RTCA2] = {
	.reg = 3,
	.mask = S5M8767_IRQ_RTCA2_MASK,
	},
	[S5M8767_IRQ_SMPL] = {
	.reg = 3,
	.mask = S5M8767_IRQ_SMPL_MASK,
	},
	[S5M8767_IRQ_RTC1S] = {
	.reg = 3,
	.mask = S5M8767_IRQ_RTC1S_MASK,
	},
	[S5M8767_IRQ_WTSR] = {
	.reg = 3,
	.mask = S5M8767_IRQ_WTSR_MASK,
	},
	};

	static struct s5m_irq_data s5m8763_irqs[] = {
	[S5M8763_IRQ_DCINF] = {
	.reg = 1,
	.mask = S5M8763_IRQ_DCINF_MASK,
	},
	[S5M8763_IRQ_DCINR] = {
	.reg = 1,
	.mask = S5M8763_IRQ_DCINR_MASK,
	},
	[S5M8763_IRQ_JIGF] = {
	.reg = 1,
	.mask = S5M8763_IRQ_JIGF_MASK,
	},
	[S5M8763_IRQ_JIGR] = {
	.reg = 1,
	.mask = S5M8763_IRQ_JIGR_MASK,
	},
	[S5M8763_IRQ_PWRONF] = {
	.reg = 1,
	.mask = S5M8763_IRQ_PWRONF_MASK,
	},
	[S5M8763_IRQ_PWRONR] = {
	.reg = 1,
	.mask = S5M8763_IRQ_PWRONR_MASK,
	},
	[S5M8763_IRQ_WTSREVNT] = {
	.reg = 2,
	.mask = S5M8763_IRQ_WTSREVNT_MASK,
	},
	[S5M8763_IRQ_SMPLEVNT] = {
	.reg = 2,
	.mask = S5M8763_IRQ_SMPLEVNT_MASK,
	},
	[S5M8763_IRQ_ALARM1] = {
	.reg = 2,
	.mask = S5M8763_IRQ_ALARM1_MASK,
	},
	[S5M8763_IRQ_ALARM0] = {
	.reg = 2,
	.mask = S5M8763_IRQ_ALARM0_MASK,
	},
	[S5M8763_IRQ_ONKEY1S] = {
	.reg = 3,
	.mask = S5M8763_IRQ_ONKEY1S_MASK,
	},
	[S5M8763_IRQ_TOPOFFR] = {
	.reg = 3,
	.mask = S5M8763_IRQ_TOPOFFR_MASK,
	},
	[S5M8763_IRQ_DCINOVPR] = {
	.reg = 3,
	.mask = S5M8763_IRQ_DCINOVPR_MASK,
	},
	[S5M8763_IRQ_CHGRSTF] = {
	.reg = 3,
	.mask = S5M8763_IRQ_CHGRSTF_MASK,
	},
	[S5M8763_IRQ_DONER] = {
	.reg = 3,
	.mask = S5M8763_IRQ_DONER_MASK,
	},
	[S5M8763_IRQ_CHGFAULT] = {
	.reg = 3,
	.mask = S5M8763_IRQ_CHGFAULT_MASK,
	},
	[S5M8763_IRQ_LOBAT1] = {
	.reg = 4,
	.mask = S5M8763_IRQ_LOBAT1_MASK,
	},
	[S5M8763_IRQ_LOBAT2] = {
	.reg = 4,
	.mask = S5M8763_IRQ_LOBAT2_MASK,
	},
	};

	static inline struct s5m_irq_data *
	irq_to_s5m8767_irq(struct s5m87xx_dev *s5m87xx, int irq)
	{
	return &s5m8767_irqs[irq - s5m87xx->irq_base];
	}

	static void s5m8767_irq_lock(struct irq_data *data)
	{
	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);

	mutex_lock(&s5m87xx->irqlock);
	}

	static void s5m8767_irq_sync_unlock(struct irq_data *data)
	{
	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);
	int i;

	for (i = 0; i < ARRAY_SIZE(s5m87xx->irq_masks_cur); i++) {
	if (s5m87xx->irq_masks_cur[i] != s5m87xx->irq_masks_cache[i]) {
	s5m87xx->irq_masks_cache[i] = s5m87xx->irq_masks_cur[i];
	s5m_reg_write(s5m87xx, S5M8767_REG_INT1M + i,
	s5m87xx->irq_masks_cur[i]);
	}
	}

	mutex_unlock(&s5m87xx->irqlock);
	}

	static void s5m8767_irq_unmask(struct irq_data *data)
	{
	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);
	struct s5m_irq_data *irq_data = irq_to_s5m8767_irq(s5m87xx,
	data->irq);

	s5m87xx->irq_masks_cur[irq_data->reg - 1] &= ~irq_data->mask;
	}

	static void s5m8767_irq_mask(struct irq_data *data)
	{
	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);
	struct s5m_irq_data *irq_data = irq_to_s5m8767_irq(s5m87xx,
	data->irq);

	s5m87xx->irq_masks_cur[irq_data->reg - 1] \|= irq_data->mask;
	}

	static struct irq_chip s5m8767_irq_chip = {
	.name = "s5m8767",
	.irq_bus_lock = s5m8767_irq_lock,
	.irq_bus_sync_unlock = s5m8767_irq_sync_unlock,
	.irq_mask = s5m8767_irq_mask,
	.irq_unmask = s5m8767_irq_unmask,
	};

	static inline struct s5m_irq_data *
	irq_to_s5m8763_irq(struct s5m87xx_dev *s5m87xx, int irq)
	{
	return &s5m8763_irqs[irq - s5m87xx->irq_base];
	}

	static void s5m8763_irq_lock(struct irq_data *data)
	{
	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);

	mutex_lock(&s5m87xx->irqlock);
	}

	static void s5m8763_irq_sync_unlock(struct irq_data *data)
	{
	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);
	int i;

	for (i = 0; i < ARRAY_SIZE(s5m87xx->irq_masks_cur); i++) {
	if (s5m87xx->irq_masks_cur[i] != s5m87xx->irq_masks_cache[i]) {
	s5m87xx->irq_masks_cache[i] = s5m87xx->irq_masks_cur[i];
	s5m_reg_write(s5m87xx, S5M8763_REG_IRQM1 + i,
	s5m87xx->irq_masks_cur[i]);
	}
	}

	mutex_unlock(&s5m87xx->irqlock);
	}

	static void s5m8763_irq_unmask(struct irq_data *data)
	{
	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);
	struct s5m_irq_data *irq_data = irq_to_s5m8763_irq(s5m87xx,
	data->irq);

	s5m87xx->irq_masks_cur[irq_data->reg - 1] &= ~irq_data->mask;
	}

	static void s5m8763_irq_mask(struct irq_data *data)
	{
	struct s5m87xx_dev *s5m87xx = irq_data_get_irq_chip_data(data);
	struct s5m_irq_data *irq_data = irq_to_s5m8763_irq(s5m87xx,
	data->irq);

	s5m87xx->irq_masks_cur[irq_data->reg - 1] \|= irq_data->mask;
	}

	static struct irq_chip s5m8763_irq_chip = {
	.name = "s5m8763",
	.irq_bus_lock = s5m8763_irq_lock,
	.irq_bus_sync_unlock = s5m8763_irq_sync_unlock,
	.irq_mask = s5m8763_irq_mask,
	.irq_unmask = s5m8763_irq_unmask,
	};


	static irqreturn_t s5m8767_irq_thread(int irq, void *data)
	{
	struct s5m87xx_dev *s5m87xx = data;
	u8 irq_reg[NUM_IRQ_REGS-1];
	int ret;
	int i;


	ret = s5m_bulk_read(s5m87xx, S5M8767_REG_INT1,
	NUM_IRQ_REGS - 1, irq_reg);
	if (ret < 0) {
	dev_err(s5m87xx->dev, "Failed to read interrupt register: %d\n",
	ret);
	return IRQ_NONE;
	}

	for (i = 0; i < NUM_IRQ_REGS - 1; i++)
	irq_reg[i] &= ~s5m87xx->irq_masks_cur[i];

	for (i = 0; i < S5M8767_IRQ_NR; i++) {
	if (irq_reg[s5m8767_irqs[i].reg - 1] & s5m8767_irqs[i].mask)
	handle_nested_irq(s5m87xx->irq_base + i);
	}

	return IRQ_HANDLED;
	}

	static irqreturn_t s5m8763_irq_thread(int irq, void *data)
	{
	struct s5m87xx_dev *s5m87xx = data;
	u8 irq_reg[NUM_IRQ_REGS];
	int ret;
	int i;

	ret = s5m_bulk_read(s5m87xx, S5M8763_REG_IRQ1,
	NUM_IRQ_REGS, irq_reg);
	if (ret < 0) {
	dev_err(s5m87xx->dev, "Failed to read interrupt register: %d\n",
	ret);
	return IRQ_NONE;
	}

	for (i = 0; i < NUM_IRQ_REGS; i++)
	irq_reg[i] &= ~s5m87xx->irq_masks_cur[i];

	for (i = 0; i < S5M8763_IRQ_NR; i++) {
	if (irq_reg[s5m8763_irqs[i].reg - 1] & s5m8763_irqs[i].mask)
	handle_nested_irq(s5m87xx->irq_base + i);
	}

	return IRQ_HANDLED;
	}

	int s5m_irq_resume(struct s5m87xx_dev *s5m87xx)
	{
	if (s5m87xx->irq && s5m87xx->irq_base){
	switch (s5m87xx->device_type) {
	case S5M8763X:
	s5m8763_irq_thread(s5m87xx->irq_base, s5m87xx);
	break;
	case S5M8767X:
	s5m8767_irq_thread(s5m87xx->irq_base, s5m87xx);
	break;
	default:
	dev_err(s5m87xx->dev,
	"Unknown device type %d\n",
	s5m87xx->device_type);
	return -EINVAL;

	}
	}
	return 0;
	}

	int s5m_irq_init(struct s5m87xx_dev *s5m87xx)
	{
	int i;
	int cur_irq;
	int ret = 0;
	int type = s5m87xx->device_type;

	if (!s5m87xx->irq) {
	dev_warn(s5m87xx->dev,
	"No interrupt specified, no interrupts\n");
	s5m87xx->irq_base = 0;
	return 0;
	}

	if (!s5m87xx->irq_base) {
	dev_err(s5m87xx->dev,
	"No interrupt base specified, no interrupts\n");
	return 0;
	}

	mutex_init(&s5m87xx->irqlock);

	switch (type) {
	case S5M8763X:
	for (i = 0; i < NUM_IRQ_REGS; i++) {
	s5m87xx->irq_masks_cur[i] = 0xff;
	s5m87xx->irq_masks_cache[i] = 0xff;
	s5m_reg_write(s5m87xx, S5M8763_REG_IRQM1 + i,
	0xff);
	}

	s5m_reg_write(s5m87xx, S5M8763_REG_STATUSM1, 0xff);
	s5m_reg_write(s5m87xx, S5M8763_REG_STATUSM2, 0xff);

	for (i = 0; i < S5M8763_IRQ_NR; i++) {
	cur_irq = i + s5m87xx->irq_base;
	irq_set_chip_data(cur_irq, s5m87xx);
	irq_set_chip_and_handler(cur_irq, &s5m8763_irq_chip,
	handle_edge_irq);
	irq_set_nested_thread(cur_irq, 1);
	#ifdef CONFIG_ARM
	set_irq_flags(cur_irq, IRQF_VALID);
	#else
	irq_set_noprobe(cur_irq);
	#endif
	}

	ret = request_threaded_irq(s5m87xx->irq, NULL,
	s5m8763_irq_thread,
	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
	"s5m87xx-irq", s5m87xx);
	if (ret) {
	dev_err(s5m87xx->dev, "Failed to request IRQ %d: %d\n",
	s5m87xx->irq, ret);
	return ret;
	}
	break;
	case S5M8767X:
	for (i = 0; i < NUM_IRQ_REGS - 1; i++) {
	s5m87xx->irq_masks_cur[i] = 0xff;
	s5m87xx->irq_masks_cache[i] = 0xff;
	s5m_reg_write(s5m87xx, S5M8767_REG_INT1M + i,
	0xff);
	}
	for (i = 0; i < S5M8767_IRQ_NR; i++) {
	cur_irq = i + s5m87xx->irq_base;
	irq_set_chip_data(cur_irq, s5m87xx);
	if (ret) {
	dev_err(s5m87xx->dev,
	"Failed to irq_set_chip_data %d: %d\n",
	s5m87xx->irq, ret);
	return ret;
	}

	irq_set_chip_and_handler(cur_irq, &s5m8767_irq_chip,
	handle_edge_irq);
	irq_set_nested_thread(cur_irq, 1);
	#ifdef CONFIG_ARM
	set_irq_flags(cur_irq, IRQF_VALID);
	#else
	irq_set_noprobe(cur_irq);
	#endif
	}

	ret = request_threaded_irq(s5m87xx->irq, NULL,
	s5m8767_irq_thread,
	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
	"s5m87xx-irq", s5m87xx);
	if (ret) {
	dev_err(s5m87xx->dev, "Failed to request IRQ %d: %d\n",
	s5m87xx->irq, ret);
	return ret;
	}
	break;
	default:
	dev_err(s5m87xx->dev,
	"Unknown device type %d\n", s5m87xx->device_type);
	return -EINVAL;
	}

	if (!s5m87xx->ono)
	return 0;

	switch (type) {
	case S5M8763X:
	ret = request_threaded_irq(s5m87xx->ono, NULL,
	s5m8763_irq_thread,
	IRQF_TRIGGER_FALLING \|
	IRQF_TRIGGER_RISING \|
	IRQF_ONESHOT, "s5m87xx-ono",
	s5m87xx);
	break;
	case S5M8767X:
	ret = request_threaded_irq(s5m87xx->ono, NULL,
	s5m8767_irq_thread,
	IRQF_TRIGGER_FALLING \|
	IRQF_TRIGGER_RISING \|
	IRQF_ONESHOT, "s5m87xx-ono", s5m87xx);
	break;
	default:
	ret = -EINVAL;
	break;
	}

	if (ret) {
	dev_err(s5m87xx->dev, "Failed to request IRQ %d: %d\n",
	s5m87xx->ono, ret);
	return ret;
	}

	return 0;
	}

	void s5m_irq_exit(struct s5m87xx_dev *s5m87xx)
	{
	if (s5m87xx->ono)
	free_irq(s5m87xx->ono, s5m87xx);

	if (s5m87xx->irq)
	free_irq(s5m87xx->irq, s5m87xx);
	}