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Commit 6592ebb3 authored by Chanwoo Choi's avatar Chanwoo Choi Committed by Samuel Ortiz
Browse files

mfd: Add MAX77693 irq handler 



This patch supports IRQ handling for MAX77693.

Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: default avatarMyungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 83871c00

drivers/mfd/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -78,7 +78,7 @@ obj-$(CONFIG_PMIC_DA9052) += da9052-core.o 
obj-$(CONFIG_MFD_DA9052_SPI)	+= da9052-spi.o

obj-$(CONFIG_MFD_DA9052_I2C)	+= da9052-i2c.o



obj-$(CONFIG_MFD_MAX77693)	+= max77693.o

obj-$(CONFIG_MFD_MAX77693)	+= max77693.o max77693-irq.o

max8925-objs			:= max8925-core.o max8925-i2c.o

obj-$(CONFIG_MFD_MAX8925)	+= max8925.o

obj-$(CONFIG_MFD_MAX8997)	+= max8997.o max8997-irq.o

drivers/mfd/max77693-irq.c

0 → 100644
+309 −0
Original line number Diff line number Diff line 
/*

 * max77693-irq.c - Interrupt controller support for MAX77693

 *

 * Copyright (C) 2012 Samsung Electronics Co.Ltd

 * SangYoung Son <hello.son@samsung.com>

 *

 * This program is not provided / owned by Maxim Integrated Products.

 *

 * 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.

 *

 * 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

 *

 * This driver is based on max8997-irq.c

 */



#include <linux/err.h>

#include <linux/irq.h>

#include <linux/interrupt.h>

#include <linux/module.h>

#include <linux/irqdomain.h>

#include <linux/mfd/max77693.h>

#include <linux/mfd/max77693-private.h>



static const u8 max77693_mask_reg[] = {

	[LED_INT] = MAX77693_LED_REG_FLASH_INT_MASK,

	[TOPSYS_INT] = MAX77693_PMIC_REG_TOPSYS_INT_MASK,

	[CHG_INT] = MAX77693_CHG_REG_CHG_INT_MASK,

	[MUIC_INT1] = MAX77693_MUIC_REG_INTMASK1,

	[MUIC_INT2] = MAX77693_MUIC_REG_INTMASK2,

	[MUIC_INT3] = MAX77693_MUIC_REG_INTMASK3,

};



static struct regmap *max77693_get_regmap(struct max77693_dev *max77693,

				enum max77693_irq_source src)

{

	switch (src) {

	case LED_INT ... CHG_INT:

		return max77693->regmap;

	case MUIC_INT1 ... MUIC_INT3:

		return max77693->regmap_muic;

	default:

		return ERR_PTR(-EINVAL);

	}

}



struct max77693_irq_data {

	int mask;

	enum max77693_irq_source group;

};



#define DECLARE_IRQ(idx, _group, _mask)		\

	[(idx)] = { .group = (_group), .mask = (_mask) }

static const struct max77693_irq_data max77693_irqs[] = {

	DECLARE_IRQ(MAX77693_LED_IRQ_FLED2_OPEN,	LED_INT, 1 << 0),

	DECLARE_IRQ(MAX77693_LED_IRQ_FLED2_SHORT,	LED_INT, 1 << 1),

	DECLARE_IRQ(MAX77693_LED_IRQ_FLED1_OPEN,	LED_INT, 1 << 2),

	DECLARE_IRQ(MAX77693_LED_IRQ_FLED1_SHORT,	LED_INT, 1 << 3),

	DECLARE_IRQ(MAX77693_LED_IRQ_MAX_FLASH,		LED_INT, 1 << 4),



	DECLARE_IRQ(MAX77693_TOPSYS_IRQ_T120C_INT,	TOPSYS_INT, 1 << 0),

	DECLARE_IRQ(MAX77693_TOPSYS_IRQ_T140C_INT,	TOPSYS_INT, 1 << 1),

	DECLARE_IRQ(MAX77693_TOPSYS_IRQ_LOWSYS_INT,	TOPSYS_INT, 1 << 3),



	DECLARE_IRQ(MAX77693_CHG_IRQ_BYP_I,		CHG_INT, 1 << 0),

	DECLARE_IRQ(MAX77693_CHG_IRQ_THM_I,		CHG_INT, 1 << 2),

	DECLARE_IRQ(MAX77693_CHG_IRQ_BAT_I,		CHG_INT, 1 << 3),

	DECLARE_IRQ(MAX77693_CHG_IRQ_CHG_I,		CHG_INT, 1 << 4),

	DECLARE_IRQ(MAX77693_CHG_IRQ_CHGIN_I,		CHG_INT, 1 << 6),



	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT1_ADC,		MUIC_INT1, 1 << 0),

	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT1_ADC_LOW,	MUIC_INT1, 1 << 1),

	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT1_ADC_ERR,	MUIC_INT1, 1 << 2),

	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT1_ADC1K,	MUIC_INT1, 1 << 3),



	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_CHGTYP,	MUIC_INT2, 1 << 0),

	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_CHGDETREUN,	MUIC_INT2, 1 << 1),

	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_DCDTMR,	MUIC_INT2, 1 << 2),

	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_DXOVP,	MUIC_INT2, 1 << 3),

	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_VBVOLT,	MUIC_INT2, 1 << 4),

	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT2_VIDRM,	MUIC_INT2, 1 << 5),



	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_EOC,		MUIC_INT3, 1 << 0),

	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_CGMBC,	MUIC_INT3, 1 << 1),

	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_OVP,		MUIC_INT3, 1 << 2),

	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,	MUIC_INT3, 1 << 3),

	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,	MUIC_INT3, 1 << 4),

	DECLARE_IRQ(MAX77693_MUIC_IRQ_INT3_BAT_DET,	MUIC_INT3, 1 << 5),

};



static void max77693_irq_lock(struct irq_data *data)

{

	struct max77693_dev *max77693 = irq_get_chip_data(data->irq);



	mutex_lock(&max77693->irqlock);

}



static void max77693_irq_sync_unlock(struct irq_data *data)

{

	struct max77693_dev *max77693 = irq_get_chip_data(data->irq);

	int i;



	for (i = 0; i < MAX77693_IRQ_GROUP_NR; i++) {

		u8 mask_reg = max77693_mask_reg[i];

		struct regmap *map = max77693_get_regmap(max77693, i);



		if (mask_reg == MAX77693_REG_INVALID ||

				IS_ERR_OR_NULL(map))

			continue;

		max77693->irq_masks_cache[i] = max77693->irq_masks_cur[i];



		max77693_write_reg(map, max77693_mask_reg[i],

				max77693->irq_masks_cur[i]);

	}



	mutex_unlock(&max77693->irqlock);

}



static const inline struct max77693_irq_data *

irq_to_max77693_irq(struct max77693_dev *max77693, int irq)

{

	return &max77693_irqs[irq];

}



static void max77693_irq_mask(struct irq_data *data)

{

	struct max77693_dev *max77693 = irq_get_chip_data(data->irq);

	const struct max77693_irq_data *irq_data =

				irq_to_max77693_irq(max77693, data->irq);



	if (irq_data->group >= MUIC_INT1 && irq_data->group <= MUIC_INT3)

		max77693->irq_masks_cur[irq_data->group] &= ~irq_data->mask;

	else

		max77693->irq_masks_cur[irq_data->group] |= irq_data->mask;

}



static void max77693_irq_unmask(struct irq_data *data)

{

	struct max77693_dev *max77693 = irq_get_chip_data(data->irq);

	const struct max77693_irq_data *irq_data =

	    irq_to_max77693_irq(max77693, data->irq);



	if (irq_data->group >= MUIC_INT1 && irq_data->group <= MUIC_INT3)

		max77693->irq_masks_cur[irq_data->group] |= irq_data->mask;

	else

		max77693->irq_masks_cur[irq_data->group] &= ~irq_data->mask;

}



static struct irq_chip max77693_irq_chip = {

	.name			= "max77693",

	.irq_bus_lock		= max77693_irq_lock,

	.irq_bus_sync_unlock	= max77693_irq_sync_unlock,

	.irq_mask		= max77693_irq_mask,

	.irq_unmask		= max77693_irq_unmask,

};



#define MAX77693_IRQSRC_CHG		(1 << 0)

#define MAX77693_IRQSRC_TOP		(1 << 1)

#define MAX77693_IRQSRC_FLASH		(1 << 2)

#define MAX77693_IRQSRC_MUIC		(1 << 3)

static irqreturn_t max77693_irq_thread(int irq, void *data)

{

	struct max77693_dev *max77693 = data;

	u8 irq_reg[MAX77693_IRQ_GROUP_NR] = {};

	u8 irq_src;

	int ret;

	int i, cur_irq;



	ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_INTSRC,

				&irq_src);

	if (ret < 0) {

		dev_err(max77693->dev, "Failed to read interrupt source: %d\n",

				ret);

		return IRQ_NONE;

	}



	if (irq_src & MAX77693_IRQSRC_CHG)

		/* CHG_INT */

		ret = max77693_read_reg(max77693->regmap, MAX77693_CHG_REG_CHG_INT,

				&irq_reg[CHG_INT]);



	if (irq_src & MAX77693_IRQSRC_TOP)

		/* TOPSYS_INT */

		ret = max77693_read_reg(max77693->regmap,

			MAX77693_PMIC_REG_TOPSYS_INT, &irq_reg[TOPSYS_INT]);



	if (irq_src & MAX77693_IRQSRC_FLASH)

		/* LED_INT */

		ret = max77693_read_reg(max77693->regmap,

			MAX77693_LED_REG_FLASH_INT, &irq_reg[LED_INT]);



	if (irq_src & MAX77693_IRQSRC_MUIC)

		/* MUIC INT1 ~ INT3 */

		max77693_bulk_read(max77693->regmap, MAX77693_MUIC_REG_INT1,

			MAX77693_NUM_IRQ_MUIC_REGS, &irq_reg[MUIC_INT1]);



	/* Apply masking */

	for (i = 0; i < MAX77693_IRQ_GROUP_NR; i++) {

		if (i >= MUIC_INT1 && i <= MUIC_INT3)

			irq_reg[i] &= max77693->irq_masks_cur[i];

		else

			irq_reg[i] &= ~max77693->irq_masks_cur[i];

	}



	/* Report */

	for (i = 0; i < MAX77693_IRQ_NR; i++) {

		if (irq_reg[max77693_irqs[i].group] & max77693_irqs[i].mask) {

			cur_irq = irq_find_mapping(max77693->irq_domain, i);

			if (cur_irq)

				handle_nested_irq(cur_irq);

		}

	}



	return IRQ_HANDLED;

}



int max77693_irq_resume(struct max77693_dev *max77693)

{

	if (max77693->irq)

		max77693_irq_thread(0, max77693);



	return 0;

}



static int max77693_irq_domain_map(struct irq_domain *d, unsigned int irq,

				irq_hw_number_t hw)

{

	struct max77693_dev *max77693 = d->host_data;



	irq_set_chip_data(irq, max77693);

	irq_set_chip_and_handler(irq, &max77693_irq_chip, handle_edge_irq);

	irq_set_nested_thread(irq, 1);

#ifdef CONFIG_ARM

	set_irq_flags(irq, IRQF_VALID);

#else

	irq_set_noprobe(irq);

#endif

	return 0;

}



static struct irq_domain_ops max77693_irq_domain_ops = {

	.map = max77693_irq_domain_map,

};



int max77693_irq_init(struct max77693_dev *max77693)

{

	struct irq_domain *domain;

	int i;

	int ret;



	mutex_init(&max77693->irqlock);



	/* Mask individual interrupt sources */

	for (i = 0; i < MAX77693_IRQ_GROUP_NR; i++) {

		struct regmap *map;

		/* MUIC IRQ  0:MASK 1:NOT MASK */

		/* Other IRQ 1:MASK 0:NOT MASK */

		if (i >= MUIC_INT1 && i <= MUIC_INT3) {

			max77693->irq_masks_cur[i] = 0x00;

			max77693->irq_masks_cache[i] = 0x00;

		} else {

			max77693->irq_masks_cur[i] = 0xff;

			max77693->irq_masks_cache[i] = 0xff;

		}

		map = max77693_get_regmap(max77693, i);



		if (IS_ERR_OR_NULL(map))

			continue;

		if (max77693_mask_reg[i] == MAX77693_REG_INVALID)

			continue;

		if (i >= MUIC_INT1 && i <= MUIC_INT3)

			max77693_write_reg(map, max77693_mask_reg[i], 0x00);

		else

			max77693_write_reg(map, max77693_mask_reg[i], 0xff);

	}



	domain = irq_domain_add_linear(NULL, MAX77693_IRQ_NR,

					&max77693_irq_domain_ops, max77693);

	if (!domain) {

		dev_err(max77693->dev, "could not create irq domain\n");

		return -ENODEV;

	}

	max77693->irq_domain = domain;



	ret = request_threaded_irq(max77693->irq, NULL, max77693_irq_thread,

				   IRQF_TRIGGER_FALLING | IRQF_ONESHOT,

				   "max77693-irq", max77693);



	if (ret)

		dev_err(max77693->dev, "Failed to request IRQ %d: %d\n",

			max77693->irq, ret);



	return 0;

}



void max77693_irq_exit(struct max77693_dev *max77693)

{

	if (max77693->irq)

		free_irq(max77693->irq, max77693);

}

drivers/mfd/max77693.c

+32 −0
Original line number Diff line number Diff line
@@ -154,6 +154,10 @@ static int max77693_i2c_probe(struct i2c_client *i2c, 
	max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);

	i2c_set_clientdata(max77693->haptic, max77693);



	ret = max77693_irq_init(max77693);

	if (ret < 0)

		goto err_mfd;



	pm_runtime_set_active(max77693->dev);



	ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
@@ -161,6 +165,8 @@ static int max77693_i2c_probe(struct i2c_client *i2c, 
	if (ret < 0)

		goto err_mfd;



	device_init_wakeup(max77693->dev, pdata->wakeup);



	return ret;



err_mfd:
@@ -189,10 +195,36 @@ static const struct i2c_device_id max77693_i2c_id[] = { 
};

MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);



static int max77693_suspend(struct device *dev)

{

	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);

	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);



	if (device_may_wakeup(dev))

		irq_set_irq_wake(max77693->irq, 1);

	return 0;

}



static int max77693_resume(struct device *dev)

{

	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);

	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);



	if (device_may_wakeup(dev))

		irq_set_irq_wake(max77693->irq, 0);

	return max77693_irq_resume(max77693);

}



const struct dev_pm_ops max77693_pm = {

	.suspend = max77693_suspend,

	.resume = max77693_resume,

};



static struct i2c_driver max77693_i2c_driver = {

	.driver = {

		   .name = "max77693",

		   .owner = THIS_MODULE,

		   .pm = &max77693_pm,

	},

	.probe = max77693_i2c_probe,

	.remove = max77693_i2c_remove,

include/linux/mfd/max77693.h

+0 −1
Original line number Diff line number Diff line
@@ -31,7 +31,6 @@ 
#define __LINUX_MFD_MAX77693_H



struct max77693_platform_data {

	/* IRQ */

	int wakeup;

};

#endif	/* __LINUX_MFD_MAX77693_H */