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linux-next/drivers/mfd/max77693.c
Robert Baldyga 342d669c1e mfd: max77693: Handle IRQs using regmap 
This patch modifies mfd driver to use regmap for handling interrupts.
It allows to simplify irq handling process. This modifications needed
to make small changes in function drivers, which use interrupts.

Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-06-17 15:17:00 +01:00

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/*
* max77693.c - mfd core driver for the MAX 77693
*
* Copyright (C) 2012 Samsung Electronics
* SangYoung Son <hello.son@smasung.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.c
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/pm_runtime.h>
#include <linux/mutex.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max77693.h>
#include <linux/mfd/max77693-private.h>
#include <linux/regulator/machine.h>
#include <linux/regmap.h>
#define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */
#define I2C_ADDR_MUIC (0x4A >> 1)
#define I2C_ADDR_HAPTIC (0x90 >> 1)
static const struct mfd_cell max77693_devs[] = {
{ .name = "max77693-pmic", },
{ .name = "max77693-charger", },
{ .name = "max77693-flash", },
{ .name = "max77693-muic", },
{ .name = "max77693-haptic", },
};
static const struct regmap_config max77693_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX77693_PMIC_REG_END,
};
static const struct regmap_irq max77693_led_irqs[] = {
{ .mask = LED_IRQ_FLED2_OPEN, },
{ .mask = LED_IRQ_FLED2_SHORT, },
{ .mask = LED_IRQ_FLED1_OPEN, },
{ .mask = LED_IRQ_FLED1_SHORT, },
{ .mask = LED_IRQ_MAX_FLASH, },
};
static const struct regmap_irq_chip max77693_led_irq_chip = {
.name = "max77693-led",
.status_base = MAX77693_LED_REG_FLASH_INT,
.mask_base = MAX77693_LED_REG_FLASH_INT_MASK,
.mask_invert = false,
.num_regs = 1,
.irqs = max77693_led_irqs,
.num_irqs = ARRAY_SIZE(max77693_led_irqs),
};
static const struct regmap_irq max77693_topsys_irqs[] = {
{ .mask = TOPSYS_IRQ_T120C_INT, },
{ .mask = TOPSYS_IRQ_T140C_INT, },
{ .mask = TOPSYS_IRQ_LOWSYS_INT, },
};
static const struct regmap_irq_chip max77693_topsys_irq_chip = {
.name = "max77693-topsys",
.status_base = MAX77693_PMIC_REG_TOPSYS_INT,
.mask_base = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
.mask_invert = false,
.num_regs = 1,
.irqs = max77693_topsys_irqs,
.num_irqs = ARRAY_SIZE(max77693_topsys_irqs),
};
static const struct regmap_irq max77693_charger_irqs[] = {
{ .mask = CHG_IRQ_BYP_I, },
{ .mask = CHG_IRQ_THM_I, },
{ .mask = CHG_IRQ_BAT_I, },
{ .mask = CHG_IRQ_CHG_I, },
{ .mask = CHG_IRQ_CHGIN_I, },
};
static const struct regmap_irq_chip max77693_charger_irq_chip = {
.name = "max77693-charger",
.status_base = MAX77693_CHG_REG_CHG_INT,
.mask_base = MAX77693_CHG_REG_CHG_INT_MASK,
.mask_invert = false,
.num_regs = 1,
.irqs = max77693_charger_irqs,
.num_irqs = ARRAY_SIZE(max77693_charger_irqs),
};
static const struct regmap_config max77693_regmap_muic_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX77693_MUIC_REG_END,
};
static const struct regmap_irq max77693_muic_irqs[] = {
{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC, },
{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW, },
{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR, },
{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K, },
{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP, },
{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN, },
{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR, },
{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP, },
{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT, },
{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM, },
{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC, },
{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC, },
{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP, },
{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR, },
{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED, },
{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET, },
};
static const struct regmap_irq_chip max77693_muic_irq_chip = {
.name = "max77693-muic",
.status_base = MAX77693_MUIC_REG_INT1,
.mask_base = MAX77693_MUIC_REG_INTMASK1,
.mask_invert = true,
.num_regs = 3,
.irqs = max77693_muic_irqs,
.num_irqs = ARRAY_SIZE(max77693_muic_irqs),
};
static int max77693_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct max77693_dev *max77693;
unsigned int reg_data;
int ret = 0;
max77693 = devm_kzalloc(&i2c->dev,
sizeof(struct max77693_dev), GFP_KERNEL);
if (max77693 == NULL)
return -ENOMEM;
i2c_set_clientdata(i2c, max77693);
max77693->dev = &i2c->dev;
max77693->i2c = i2c;
max77693->irq = i2c->irq;
max77693->type = id->driver_data;
max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
if (IS_ERR(max77693->regmap)) {
ret = PTR_ERR(max77693->regmap);
dev_err(max77693->dev, "failed to allocate register map: %d\n",
ret);
return ret;
}
ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
&reg_data);
if (ret < 0) {
dev_err(max77693->dev, "device not found on this channel\n");
return ret;
} else
dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
if (!max77693->muic) {
dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
return -ENODEV;
}
i2c_set_clientdata(max77693->muic, max77693);
max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
if (!max77693->haptic) {
dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
ret = -ENODEV;
goto err_i2c_haptic;
}
i2c_set_clientdata(max77693->haptic, max77693);
/*
* Initialize register map for MUIC device because use regmap-muic
* instance of MUIC device when irq of max77693 is initialized
* before call max77693-muic probe() function.
*/
max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
&max77693_regmap_muic_config);
if (IS_ERR(max77693->regmap_muic)) {
ret = PTR_ERR(max77693->regmap_muic);
dev_err(max77693->dev,
"failed to allocate register map: %d\n", ret);
goto err_regmap_muic;
}
ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
IRQF_ONESHOT | IRQF_SHARED |
IRQF_TRIGGER_FALLING, 0,
&max77693_led_irq_chip,
&max77693->irq_data_led);
if (ret) {
dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
goto err_regmap_muic;
}
ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
IRQF_ONESHOT | IRQF_SHARED |
IRQF_TRIGGER_FALLING, 0,
&max77693_topsys_irq_chip,
&max77693->irq_data_topsys);
if (ret) {
dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
goto err_irq_topsys;
}
ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
IRQF_ONESHOT | IRQF_SHARED |
IRQF_TRIGGER_FALLING, 0,
&max77693_charger_irq_chip,
&max77693->irq_data_charger);
if (ret) {
dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
goto err_irq_charger;
}
ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
IRQF_ONESHOT | IRQF_SHARED |
IRQF_TRIGGER_FALLING, 0,
&max77693_muic_irq_chip,
&max77693->irq_data_muic);
if (ret) {
dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
goto err_irq_muic;
}
pm_runtime_set_active(max77693->dev);
ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
if (ret < 0)
goto err_mfd;
return ret;
err_mfd:
mfd_remove_devices(max77693->dev);
regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
err_irq_muic:
regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
err_irq_charger:
regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
err_irq_topsys:
regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
err_regmap_muic:
i2c_unregister_device(max77693->haptic);
err_i2c_haptic:
i2c_unregister_device(max77693->muic);
return ret;
}
static int max77693_i2c_remove(struct i2c_client *i2c)
{
struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
mfd_remove_devices(max77693->dev);
regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
i2c_unregister_device(max77693->muic);
i2c_unregister_device(max77693->haptic);
return 0;
}
static const struct i2c_device_id max77693_i2c_id[] = {
{ "max77693", TYPE_MAX77693 },
{ }
};
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)) {
enable_irq_wake(max77693->irq);
disable_irq(max77693->irq);
}
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)) {
disable_irq_wake(max77693->irq);
enable_irq(max77693->irq);
}
return 0;
}
static const struct dev_pm_ops max77693_pm = {
.suspend = max77693_suspend,
.resume = max77693_resume,
};
#ifdef CONFIG_OF
static const struct of_device_id max77693_dt_match[] = {
{ .compatible = "maxim,max77693" },
{},
};
#endif
static struct i2c_driver max77693_i2c_driver = {
.driver = {
.name = "max77693",
.owner = THIS_MODULE,
.pm = &max77693_pm,
.of_match_table = of_match_ptr(max77693_dt_match),
},
.probe = max77693_i2c_probe,
.remove = max77693_i2c_remove,
.id_table = max77693_i2c_id,
};
static int __init max77693_i2c_init(void)
{
return i2c_add_driver(&max77693_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(max77693_i2c_init);
static void __exit max77693_i2c_exit(void)
{
i2c_del_driver(&max77693_i2c_driver);
}
module_exit(max77693_i2c_exit);
MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
MODULE_LICENSE("GPL");
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