Commit 0c816045 authored by Andreas Kemnade's avatar Andreas Kemnade Committed by Lee Jones
Browse files

mfd: rn5t618: Add IRQ support 



This adds support for IRQ handling in the RC5T619 which is required
for properly implementing subdevices like RTC.
For now only definitions for the variant RC5T619 are included.

Signed-off-by: default avatarAndreas Kemnade <andreas@kemnade.info>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 361dca7d

drivers/mfd/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -1058,6 +1058,7 @@ config MFD_RN5T618 
	depends on OF

	select MFD_CORE

	select REGMAP_I2C

	select REGMAP_IRQ

	help

	  Say yes here to add support for the Ricoh RN5T567,

	  RN5T618, RC5T619 PMIC.

drivers/mfd/rn5t618.c

+77 −1
Original line number Diff line number Diff line
@@ -8,6 +8,8 @@ 


#include <linux/delay.h>

#include <linux/i2c.h>

#include <linux/interrupt.h>

#include <linux/irq.h>

#include <linux/mfd/core.h>

#include <linux/mfd/rn5t618.h>

#include <linux/module.h>
@@ -46,9 +48,56 @@ static const struct regmap_config rn5t618_regmap_config = { 
	.cache_type	= REGCACHE_RBTREE,

};



static const struct regmap_irq rc5t619_irqs[] = {

	REGMAP_IRQ_REG(RN5T618_IRQ_SYS, 0, BIT(0)),

	REGMAP_IRQ_REG(RN5T618_IRQ_DCDC, 0, BIT(1)),

	REGMAP_IRQ_REG(RN5T618_IRQ_RTC, 0, BIT(2)),

	REGMAP_IRQ_REG(RN5T618_IRQ_ADC, 0, BIT(3)),

	REGMAP_IRQ_REG(RN5T618_IRQ_GPIO, 0, BIT(4)),

	REGMAP_IRQ_REG(RN5T618_IRQ_CHG, 0, BIT(6)),

};



static const struct regmap_irq_chip rc5t619_irq_chip = {

	.name = "rc5t619",

	.irqs = rc5t619_irqs,

	.num_irqs = ARRAY_SIZE(rc5t619_irqs),

	.num_regs = 1,

	.status_base = RN5T618_INTMON,

	.mask_base = RN5T618_INTEN,

	.mask_invert = true,

};



static struct rn5t618 *rn5t618_pm_power_off;

static struct notifier_block rn5t618_restart_handler;



static int rn5t618_irq_init(struct rn5t618 *rn5t618)

{

	const struct regmap_irq_chip *irq_chip = NULL;

	int ret;



	if (!rn5t618->irq)

		return 0;



	switch (rn5t618->variant) {

	case RC5T619:

		irq_chip = &rc5t619_irq_chip;

		break;

	default:

		dev_err(rn5t618->dev, "Currently no IRQ support for variant %d\n",

			(int)rn5t618->variant);

		return -ENOENT;

	}



	ret = devm_regmap_add_irq_chip(rn5t618->dev, rn5t618->regmap,

				       rn5t618->irq,

				       IRQF_TRIGGER_FALLING | IRQF_ONESHOT,

				       0, irq_chip, &rn5t618->irq_data);

	if (ret)

		dev_err(rn5t618->dev, "Failed to register IRQ chip\n");



	return ret;

}



static void rn5t618_trigger_poweroff_sequence(bool repower)

{

	/* disable automatic repower-on */
@@ -106,6 +155,8 @@ static int rn5t618_i2c_probe(struct i2c_client *i2c, 


	i2c_set_clientdata(i2c, priv);

	priv->variant = (long)of_id->data;

	priv->irq = i2c->irq;

	priv->dev = &i2c->dev;



	priv->regmap = devm_regmap_init_i2c(i2c, &rn5t618_regmap_config);

	if (IS_ERR(priv->regmap)) {
@@ -138,7 +189,7 @@ static int rn5t618_i2c_probe(struct i2c_client *i2c, 
		return ret;

	}



	return 0;

	return rn5t618_irq_init(priv);

}



static int rn5t618_i2c_remove(struct i2c_client *i2c)
@@ -155,15 +206,40 @@ static int rn5t618_i2c_remove(struct i2c_client *i2c) 
	return 0;

}



static int __maybe_unused rn5t618_i2c_suspend(struct device *dev)

{

	struct rn5t618 *priv = dev_get_drvdata(dev);



	if (priv->irq)

		disable_irq(priv->irq);



	return 0;

}



static int __maybe_unused rn5t618_i2c_resume(struct device *dev)

{

	struct rn5t618 *priv = dev_get_drvdata(dev);



	if (priv->irq)

		enable_irq(priv->irq);



	return 0;

}



static const struct i2c_device_id rn5t618_i2c_id[] = {

	{ }

};

MODULE_DEVICE_TABLE(i2c, rn5t618_i2c_id);



static SIMPLE_DEV_PM_OPS(rn5t618_i2c_dev_pm_ops,

			rn5t618_i2c_suspend,

			rn5t618_i2c_resume);



static struct i2c_driver rn5t618_i2c_driver = {

	.driver = {

		.name = "rn5t618",

		.of_match_table = of_match_ptr(rn5t618_of_match),

		.pm = &rn5t618_i2c_dev_pm_ops,

	},

	.probe = rn5t618_i2c_probe,

	.remove = rn5t618_i2c_remove,

include/linux/mfd/rn5t618.h

+15 −0
Original line number Diff line number Diff line
@@ -242,9 +242,24 @@ enum { 
	RC5T619,

};



/* RN5T618 IRQ definitions */

enum {

	RN5T618_IRQ_SYS = 0,

	RN5T618_IRQ_DCDC,

	RN5T618_IRQ_RTC,

	RN5T618_IRQ_ADC,

	RN5T618_IRQ_GPIO,

	RN5T618_IRQ_CHG,

	RN5T618_NR_IRQS,

};



struct rn5t618 {

	struct regmap *regmap;

	struct device *dev;

	long variant;



	int irq;

	struct regmap_irq_chip_data *irq_data;

};



#endif /* __LINUX_MFD_RN5T618_H */