Commit a4872e80 authored by Hsin-Hsiung Wang's avatar Hsin-Hsiung Wang Committed by Lee Jones
Browse files

mfd: mt6397: Extract IRQ related code from core driver 



In order to support different types of irq design, we decide to add
separate irq drivers for different design and keep mt6397 mfd core
simple and reusable to all generations of PMICs so far.

Signed-off-by: default avatarHsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 708cb5cc

drivers/mfd/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -240,7 +240,8 @@ obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o 
obj-$(CONFIG_INTEL_SOC_PMIC_BXTWC)	+= intel_soc_pmic_bxtwc.o

obj-$(CONFIG_INTEL_SOC_PMIC_CHTWC)	+= intel_soc_pmic_chtwc.o

obj-$(CONFIG_INTEL_SOC_PMIC_CHTDC_TI)	+= intel_soc_pmic_chtdc_ti.o

obj-$(CONFIG_MFD_MT6397)	+= mt6397-core.o

mt6397-objs	:= mt6397-core.o mt6397-irq.o

obj-$(CONFIG_MFD_MT6397)	+= mt6397.o



obj-$(CONFIG_MFD_ALTERA_A10SR)	+= altera-a10sr.o

obj-$(CONFIG_MFD_ALTERA_SYSMGR) += altera-sysmgr.o

drivers/mfd/mt6397-core.c

+0 −146
Original line number Diff line number Diff line
@@ -18,10 +18,6 @@ 
#define MT6397_RTC_BASE		0xe000

#define MT6397_RTC_SIZE		0x3e



#define MT6323_CHIP_ID		0x23

#define MT6391_CHIP_ID		0x91

#define MT6397_CHIP_ID		0x97



static const struct resource mt6397_rtc_resources[] = {

	{

		.start = MT6397_RTC_BASE,
@@ -86,148 +82,6 @@ static const struct mfd_cell mt6397_devs[] = { 
	}

};



static void mt6397_irq_lock(struct irq_data *data)

{

	struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);



	mutex_lock(&mt6397->irqlock);

}



static void mt6397_irq_sync_unlock(struct irq_data *data)

{

	struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);



	regmap_write(mt6397->regmap, mt6397->int_con[0],

		     mt6397->irq_masks_cur[0]);

	regmap_write(mt6397->regmap, mt6397->int_con[1],

		     mt6397->irq_masks_cur[1]);



	mutex_unlock(&mt6397->irqlock);

}



static void mt6397_irq_disable(struct irq_data *data)

{

	struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);

	int shift = data->hwirq & 0xf;

	int reg = data->hwirq >> 4;



	mt6397->irq_masks_cur[reg] &= ~BIT(shift);

}



static void mt6397_irq_enable(struct irq_data *data)

{

	struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);

	int shift = data->hwirq & 0xf;

	int reg = data->hwirq >> 4;



	mt6397->irq_masks_cur[reg] |= BIT(shift);

}



#ifdef CONFIG_PM_SLEEP

static int mt6397_irq_set_wake(struct irq_data *irq_data, unsigned int on)

{

	struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(irq_data);

	int shift = irq_data->hwirq & 0xf;

	int reg = irq_data->hwirq >> 4;



	if (on)

		mt6397->wake_mask[reg] |= BIT(shift);

	else

		mt6397->wake_mask[reg] &= ~BIT(shift);



	return 0;

}

#else

#define mt6397_irq_set_wake NULL

#endif



static struct irq_chip mt6397_irq_chip = {

	.name = "mt6397-irq",

	.irq_bus_lock = mt6397_irq_lock,

	.irq_bus_sync_unlock = mt6397_irq_sync_unlock,

	.irq_enable = mt6397_irq_enable,

	.irq_disable = mt6397_irq_disable,

	.irq_set_wake = mt6397_irq_set_wake,

};



static void mt6397_irq_handle_reg(struct mt6397_chip *mt6397, int reg,

		int irqbase)

{

	unsigned int status;

	int i, irq, ret;



	ret = regmap_read(mt6397->regmap, reg, &status);

	if (ret) {

		dev_err(mt6397->dev, "Failed to read irq status: %d\n", ret);

		return;

	}



	for (i = 0; i < 16; i++) {

		if (status & BIT(i)) {

			irq = irq_find_mapping(mt6397->irq_domain, irqbase + i);

			if (irq)

				handle_nested_irq(irq);

		}

	}



	regmap_write(mt6397->regmap, reg, status);

}



static irqreturn_t mt6397_irq_thread(int irq, void *data)

{

	struct mt6397_chip *mt6397 = data;



	mt6397_irq_handle_reg(mt6397, mt6397->int_status[0], 0);

	mt6397_irq_handle_reg(mt6397, mt6397->int_status[1], 16);



	return IRQ_HANDLED;

}



static int mt6397_irq_domain_map(struct irq_domain *d, unsigned int irq,

					irq_hw_number_t hw)

{

	struct mt6397_chip *mt6397 = d->host_data;



	irq_set_chip_data(irq, mt6397);

	irq_set_chip_and_handler(irq, &mt6397_irq_chip, handle_level_irq);

	irq_set_nested_thread(irq, 1);

	irq_set_noprobe(irq);



	return 0;

}



static const struct irq_domain_ops mt6397_irq_domain_ops = {

	.map = mt6397_irq_domain_map,

};



static int mt6397_irq_init(struct mt6397_chip *mt6397)

{

	int ret;



	mutex_init(&mt6397->irqlock);



	/* Mask all interrupt sources */

	regmap_write(mt6397->regmap, mt6397->int_con[0], 0x0);

	regmap_write(mt6397->regmap, mt6397->int_con[1], 0x0);



	mt6397->irq_domain = irq_domain_add_linear(mt6397->dev->of_node,

		MT6397_IRQ_NR, &mt6397_irq_domain_ops, mt6397);

	if (!mt6397->irq_domain) {

		dev_err(mt6397->dev, "could not create irq domain\n");

		return -ENOMEM;

	}



	ret = devm_request_threaded_irq(mt6397->dev, mt6397->irq, NULL,

		mt6397_irq_thread, IRQF_ONESHOT, "mt6397-pmic", mt6397);

	if (ret) {

		dev_err(mt6397->dev, "failed to register irq=%d; err: %d\n",

			mt6397->irq, ret);

		return ret;

	}



	return 0;

}



#ifdef CONFIG_PM_SLEEP

static int mt6397_irq_suspend(struct device *dev)

{

drivers/mfd/mt6397-irq.c

0 → 100644
+181 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

//

// Copyright (c) 2019 MediaTek Inc.



#include <linux/interrupt.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/of_irq.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>

#include <linux/mfd/mt6323/core.h>

#include <linux/mfd/mt6323/registers.h>

#include <linux/mfd/mt6397/core.h>

#include <linux/mfd/mt6397/registers.h>



static void mt6397_irq_lock(struct irq_data *data)

{

	struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);



	mutex_lock(&mt6397->irqlock);

}



static void mt6397_irq_sync_unlock(struct irq_data *data)

{

	struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);



	regmap_write(mt6397->regmap, mt6397->int_con[0],

		     mt6397->irq_masks_cur[0]);

	regmap_write(mt6397->regmap, mt6397->int_con[1],

		     mt6397->irq_masks_cur[1]);



	mutex_unlock(&mt6397->irqlock);

}



static void mt6397_irq_disable(struct irq_data *data)

{

	struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);

	int shift = data->hwirq & 0xf;

	int reg = data->hwirq >> 4;



	mt6397->irq_masks_cur[reg] &= ~BIT(shift);

}



static void mt6397_irq_enable(struct irq_data *data)

{

	struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);

	int shift = data->hwirq & 0xf;

	int reg = data->hwirq >> 4;



	mt6397->irq_masks_cur[reg] |= BIT(shift);

}



#ifdef CONFIG_PM_SLEEP

static int mt6397_irq_set_wake(struct irq_data *irq_data, unsigned int on)

{

	struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(irq_data);

	int shift = irq_data->hwirq & 0xf;

	int reg = irq_data->hwirq >> 4;



	if (on)

		mt6397->wake_mask[reg] |= BIT(shift);

	else

		mt6397->wake_mask[reg] &= ~BIT(shift);



	return 0;

}

#else

#define mt6397_irq_set_wake NULL

#endif



static struct irq_chip mt6397_irq_chip = {

	.name = "mt6397-irq",

	.irq_bus_lock = mt6397_irq_lock,

	.irq_bus_sync_unlock = mt6397_irq_sync_unlock,

	.irq_enable = mt6397_irq_enable,

	.irq_disable = mt6397_irq_disable,

	.irq_set_wake = mt6397_irq_set_wake,

};



static void mt6397_irq_handle_reg(struct mt6397_chip *mt6397, int reg,

				  int irqbase)

{

	unsigned int status;

	int i, irq, ret;



	ret = regmap_read(mt6397->regmap, reg, &status);

	if (ret) {

		dev_err(mt6397->dev, "Failed to read irq status: %d\n", ret);

		return;

	}



	for (i = 0; i < 16; i++) {

		if (status & BIT(i)) {

			irq = irq_find_mapping(mt6397->irq_domain, irqbase + i);

			if (irq)

				handle_nested_irq(irq);

		}

	}



	regmap_write(mt6397->regmap, reg, status);

}



static irqreturn_t mt6397_irq_thread(int irq, void *data)

{

	struct mt6397_chip *mt6397 = data;



	mt6397_irq_handle_reg(mt6397, mt6397->int_status[0], 0);

	mt6397_irq_handle_reg(mt6397, mt6397->int_status[1], 16);



	return IRQ_HANDLED;

}



static int mt6397_irq_domain_map(struct irq_domain *d, unsigned int irq,

				 irq_hw_number_t hw)

{

	struct mt6397_chip *mt6397 = d->host_data;



	irq_set_chip_data(irq, mt6397);

	irq_set_chip_and_handler(irq, &mt6397_irq_chip, handle_level_irq);

	irq_set_nested_thread(irq, 1);

	irq_set_noprobe(irq);



	return 0;

}



static const struct irq_domain_ops mt6397_irq_domain_ops = {

	.map = mt6397_irq_domain_map,

};



int mt6397_irq_init(struct mt6397_chip *chip)

{

	int ret;



	mutex_init(&chip->irqlock);



	switch (chip->chip_id) {

	case MT6323_CHIP_ID:

		chip->int_con[0] = MT6323_INT_CON0;

		chip->int_con[1] = MT6323_INT_CON1;

		chip->int_status[0] = MT6323_INT_STATUS0;

		chip->int_status[1] = MT6323_INT_STATUS1;

		break;



	case MT6391_CHIP_ID:

	case MT6397_CHIP_ID:

		chip->int_con[0] = MT6397_INT_CON0;

		chip->int_con[1] = MT6397_INT_CON1;

		chip->int_status[0] = MT6397_INT_STATUS0;

		chip->int_status[1] = MT6397_INT_STATUS1;

		break;



	default:

		dev_err(chip->dev, "unsupported chip: 0x%x\n", chip->chip_id);

		return -ENODEV;

	}



	/* Mask all interrupt sources */

	regmap_write(chip->regmap, chip->int_con[0], 0x0);

	regmap_write(chip->regmap, chip->int_con[1], 0x0);



	chip->irq_domain = irq_domain_add_linear(chip->dev->of_node,

						 MT6397_IRQ_NR,

						 &mt6397_irq_domain_ops,

						 chip);

	if (!chip->irq_domain) {

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

		return -ENOMEM;

	}



	ret = devm_request_threaded_irq(chip->dev, chip->irq, NULL,

					mt6397_irq_thread, IRQF_ONESHOT,

					"mt6397-pmic", chip);

	if (ret) {

		dev_err(chip->dev, "failed to register irq=%d; err: %d\n",

			chip->irq, ret);

		return ret;

	}



	return 0;

}

include/linux/mfd/mt6397/core.h

+9 −0
Original line number Diff line number Diff line
@@ -7,6 +7,12 @@ 
#ifndef __MFD_MT6397_CORE_H__

#define __MFD_MT6397_CORE_H__



enum chip_id {

	MT6323_CHIP_ID = 0x23,

	MT6391_CHIP_ID = 0x91,

	MT6397_CHIP_ID = 0x97,

};



enum mt6397_irq_numbers {

	MT6397_IRQ_SPKL_AB = 0,

	MT6397_IRQ_SPKR_AB,
@@ -54,6 +60,9 @@ struct mt6397_chip { 
	u16 irq_masks_cache[2];

	u16 int_con[2];

	u16 int_status[2];

	u16 chip_id;

};



int mt6397_irq_init(struct mt6397_chip *chip);



#endif /* __MFD_MT6397_CORE_H__ */

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