mfd: Add MAX8998 interrupts support

Use genirq and provide seperated file for interrupts support.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Joonyoung Shim 2010-09-10 18:36:39 +02:00 committed by Samuel Ortiz
parent 676e02d7a2
commit 2c7e6f5797
6 changed files with 358 additions and 9 deletions

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@ -295,7 +295,7 @@ config MFD_MAX8925
config MFD_MAX8998
bool "Maxim Semiconductor MAX8998/National LP3974 PMIC Support"
depends on I2C=y
depends on I2C=y && GENERIC_HARDIRQS
select MFD_CORE
help
Say yes here to support for Maxim Semiconductor MAX8998 and

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@ -58,7 +58,7 @@ obj-$(CONFIG_UCB1400_CORE) += ucb1400_core.o
obj-$(CONFIG_PMIC_DA903X) += da903x.o
max8925-objs := max8925-core.o max8925-i2c.o
obj-$(CONFIG_MFD_MAX8925) += max8925.o
obj-$(CONFIG_MFD_MAX8998) += max8998.o
obj-$(CONFIG_MFD_MAX8998) += max8998.o max8998-irq.o
pcf50633-objs := pcf50633-core.o pcf50633-irq.o
obj-$(CONFIG_MFD_PCF50633) += pcf50633.o

255
drivers/mfd/max8998-irq.c Normal file
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@ -0,0 +1,255 @@
/*
* Interrupt controller support for MAX8998
*
* Copyright (C) 2010 Samsung Electronics Co.Ltd
* Author: Joonyoung Shim <jy0922.shim@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/max8998-private.h>
struct max8998_irq_data {
int reg;
int mask;
};
static struct max8998_irq_data max8998_irqs[] = {
[MAX8998_IRQ_DCINF] = {
.reg = 1,
.mask = MAX8998_IRQ_DCINF_MASK,
},
[MAX8998_IRQ_DCINR] = {
.reg = 1,
.mask = MAX8998_IRQ_DCINR_MASK,
},
[MAX8998_IRQ_JIGF] = {
.reg = 1,
.mask = MAX8998_IRQ_JIGF_MASK,
},
[MAX8998_IRQ_JIGR] = {
.reg = 1,
.mask = MAX8998_IRQ_JIGR_MASK,
},
[MAX8998_IRQ_PWRONF] = {
.reg = 1,
.mask = MAX8998_IRQ_PWRONF_MASK,
},
[MAX8998_IRQ_PWRONR] = {
.reg = 1,
.mask = MAX8998_IRQ_PWRONR_MASK,
},
[MAX8998_IRQ_WTSREVNT] = {
.reg = 2,
.mask = MAX8998_IRQ_WTSREVNT_MASK,
},
[MAX8998_IRQ_SMPLEVNT] = {
.reg = 2,
.mask = MAX8998_IRQ_SMPLEVNT_MASK,
},
[MAX8998_IRQ_ALARM1] = {
.reg = 2,
.mask = MAX8998_IRQ_ALARM1_MASK,
},
[MAX8998_IRQ_ALARM0] = {
.reg = 2,
.mask = MAX8998_IRQ_ALARM0_MASK,
},
[MAX8998_IRQ_ONKEY1S] = {
.reg = 3,
.mask = MAX8998_IRQ_ONKEY1S_MASK,
},
[MAX8998_IRQ_TOPOFFR] = {
.reg = 3,
.mask = MAX8998_IRQ_TOPOFFR_MASK,
},
[MAX8998_IRQ_DCINOVPR] = {
.reg = 3,
.mask = MAX8998_IRQ_DCINOVPR_MASK,
},
[MAX8998_IRQ_CHGRSTF] = {
.reg = 3,
.mask = MAX8998_IRQ_CHGRSTF_MASK,
},
[MAX8998_IRQ_DONER] = {
.reg = 3,
.mask = MAX8998_IRQ_DONER_MASK,
},
[MAX8998_IRQ_CHGFAULT] = {
.reg = 3,
.mask = MAX8998_IRQ_CHGFAULT_MASK,
},
[MAX8998_IRQ_LOBAT1] = {
.reg = 4,
.mask = MAX8998_IRQ_LOBAT1_MASK,
},
[MAX8998_IRQ_LOBAT2] = {
.reg = 4,
.mask = MAX8998_IRQ_LOBAT2_MASK,
},
};
static inline struct max8998_irq_data *
irq_to_max8998_irq(struct max8998_dev *max8998, int irq)
{
return &max8998_irqs[irq - max8998->irq_base];
}
static void max8998_irq_lock(unsigned int irq)
{
struct max8998_dev *max8998 = get_irq_chip_data(irq);
mutex_lock(&max8998->irqlock);
}
static void max8998_irq_sync_unlock(unsigned int irq)
{
struct max8998_dev *max8998 = get_irq_chip_data(irq);
int i;
for (i = 0; i < ARRAY_SIZE(max8998->irq_masks_cur); i++) {
/*
* If there's been a change in the mask write it back
* to the hardware.
*/
if (max8998->irq_masks_cur[i] != max8998->irq_masks_cache[i]) {
max8998->irq_masks_cache[i] = max8998->irq_masks_cur[i];
max8998_write_reg(max8998->i2c, MAX8998_REG_IRQM1 + i,
max8998->irq_masks_cur[i]);
}
}
mutex_unlock(&max8998->irqlock);
}
static void max8998_irq_unmask(unsigned int irq)
{
struct max8998_dev *max8998 = get_irq_chip_data(irq);
struct max8998_irq_data *irq_data = irq_to_max8998_irq(max8998, irq);
max8998->irq_masks_cur[irq_data->reg - 1] &= ~irq_data->mask;
}
static void max8998_irq_mask(unsigned int irq)
{
struct max8998_dev *max8998 = get_irq_chip_data(irq);
struct max8998_irq_data *irq_data = irq_to_max8998_irq(max8998, irq);
max8998->irq_masks_cur[irq_data->reg - 1] |= irq_data->mask;
}
static struct irq_chip max8998_irq_chip = {
.name = "max8998",
.bus_lock = max8998_irq_lock,
.bus_sync_unlock = max8998_irq_sync_unlock,
.mask = max8998_irq_mask,
.unmask = max8998_irq_unmask,
};
static irqreturn_t max8998_irq_thread(int irq, void *data)
{
struct max8998_dev *max8998 = data;
u8 irq_reg[MAX8998_NUM_IRQ_REGS];
int ret;
int i;
ret = max8998_bulk_read(max8998->i2c, MAX8998_REG_IRQ1,
MAX8998_NUM_IRQ_REGS, irq_reg);
if (ret < 0) {
dev_err(max8998->dev, "Failed to read interrupt register: %d\n",
ret);
return IRQ_NONE;
}
/* Apply masking */
for (i = 0; i < MAX8998_NUM_IRQ_REGS; i++)
irq_reg[i] &= ~max8998->irq_masks_cur[i];
/* Report */
for (i = 0; i < MAX8998_IRQ_NR; i++) {
if (irq_reg[max8998_irqs[i].reg - 1] & max8998_irqs[i].mask)
handle_nested_irq(max8998->irq_base + i);
}
return IRQ_HANDLED;
}
int max8998_irq_init(struct max8998_dev *max8998)
{
int i;
int cur_irq;
int ret;
if (!max8998->irq) {
dev_warn(max8998->dev,
"No interrupt specified, no interrupts\n");
max8998->irq_base = 0;
return 0;
}
if (!max8998->irq_base) {
dev_err(max8998->dev,
"No interrupt base specified, no interrupts\n");
return 0;
}
mutex_init(&max8998->irqlock);
/* Mask the individual interrupt sources */
for (i = 0; i < MAX8998_NUM_IRQ_REGS; i++) {
max8998->irq_masks_cur[i] = 0xff;
max8998->irq_masks_cache[i] = 0xff;
max8998_write_reg(max8998->i2c, MAX8998_REG_IRQM1 + i, 0xff);
}
max8998_write_reg(max8998->i2c, MAX8998_REG_STATUSM1, 0xff);
max8998_write_reg(max8998->i2c, MAX8998_REG_STATUSM2, 0xff);
/* register with genirq */
for (i = 0; i < MAX8998_IRQ_NR; i++) {
cur_irq = i + max8998->irq_base;
set_irq_chip_data(cur_irq, max8998);
set_irq_chip_and_handler(cur_irq, &max8998_irq_chip,
handle_edge_irq);
set_irq_nested_thread(cur_irq, 1);
#ifdef CONFIG_ARM
set_irq_flags(cur_irq, IRQF_VALID);
#else
set_irq_noprobe(cur_irq);
#endif
}
ret = request_threaded_irq(max8998->irq, NULL, max8998_irq_thread,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
"max8998-irq", max8998);
if (ret) {
dev_err(max8998->dev, "Failed to request IRQ %d: %d\n",
max8998->irq, ret);
return ret;
}
if (!max8998->ono)
return 0;
ret = request_threaded_irq(max8998->ono, NULL, max8998_irq_thread,
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
IRQF_ONESHOT, "max8998-ono", max8998);
if (ret)
dev_err(max8998->dev, "Failed to request IRQ %d: %d\n",
max8998->ono, ret);
return 0;
}
void max8998_irq_exit(struct max8998_dev *max8998)
{
if (max8998->irq)
free_irq(max8998->irq, max8998);
}

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@ -1,5 +1,5 @@
/*
* max8698.c - mfd core driver for the Maxim 8998
* max8998.c - mfd core driver for the Maxim 8998
*
* Copyright (C) 2009-2010 Samsung Electronics
* Kyungmin Park <kyungmin.park@samsung.com>
@ -53,6 +53,21 @@ int max8998_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
}
EXPORT_SYMBOL(max8998_read_reg);
int max8998_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
{
struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&max8998->iolock);
ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
mutex_unlock(&max8998->iolock);
if (ret < 0)
return ret;
return 0;
}
EXPORT_SYMBOL(max8998_bulk_read);
int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
{
struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
@ -87,6 +102,7 @@ EXPORT_SYMBOL(max8998_update_reg);
static int max8998_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct max8998_platform_data *pdata = i2c->dev.platform_data;
struct max8998_dev *max8998;
int ret = 0;
@ -97,8 +113,15 @@ static int max8998_i2c_probe(struct i2c_client *i2c,
i2c_set_clientdata(i2c, max8998);
max8998->dev = &i2c->dev;
max8998->i2c = i2c;
max8998->irq = i2c->irq;
if (pdata) {
max8998->ono = pdata->ono;
max8998->irq_base = pdata->irq_base;
}
mutex_init(&max8998->iolock);
max8998_irq_init(max8998);
ret = mfd_add_devices(max8998->dev, -1,
max8998_devs, ARRAY_SIZE(max8998_devs),
NULL, 0);

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@ -1,5 +1,5 @@
/*
* max8698.h - Voltage regulator driver for the Maxim 8998
* max8998.h - Voltage regulator driver for the Maxim 8998
*
* Copyright (C) 2009-2010 Samsung Electrnoics
* Kyungmin Park <kyungmin.park@samsung.com>
@ -23,6 +23,8 @@
#ifndef __LINUX_MFD_MAX8998_PRIV_H
#define __LINUX_MFD_MAX8998_PRIV_H
#define MAX8998_NUM_IRQ_REGS 4
/* MAX 8998 registers */
enum {
MAX8998_REG_IRQ1,
@ -72,20 +74,86 @@ enum {
MAX8998_REG_LBCNFG2,
};
/* IRQ definitions */
enum {
MAX8998_IRQ_DCINF,
MAX8998_IRQ_DCINR,
MAX8998_IRQ_JIGF,
MAX8998_IRQ_JIGR,
MAX8998_IRQ_PWRONF,
MAX8998_IRQ_PWRONR,
MAX8998_IRQ_WTSREVNT,
MAX8998_IRQ_SMPLEVNT,
MAX8998_IRQ_ALARM1,
MAX8998_IRQ_ALARM0,
MAX8998_IRQ_ONKEY1S,
MAX8998_IRQ_TOPOFFR,
MAX8998_IRQ_DCINOVPR,
MAX8998_IRQ_CHGRSTF,
MAX8998_IRQ_DONER,
MAX8998_IRQ_CHGFAULT,
MAX8998_IRQ_LOBAT1,
MAX8998_IRQ_LOBAT2,
MAX8998_IRQ_NR,
};
#define MAX8998_IRQ_DCINF_MASK (1 << 2)
#define MAX8998_IRQ_DCINR_MASK (1 << 3)
#define MAX8998_IRQ_JIGF_MASK (1 << 4)
#define MAX8998_IRQ_JIGR_MASK (1 << 5)
#define MAX8998_IRQ_PWRONF_MASK (1 << 6)
#define MAX8998_IRQ_PWRONR_MASK (1 << 7)
#define MAX8998_IRQ_WTSREVNT_MASK (1 << 0)
#define MAX8998_IRQ_SMPLEVNT_MASK (1 << 1)
#define MAX8998_IRQ_ALARM1_MASK (1 << 2)
#define MAX8998_IRQ_ALARM0_MASK (1 << 3)
#define MAX8998_IRQ_ONKEY1S_MASK (1 << 0)
#define MAX8998_IRQ_TOPOFFR_MASK (1 << 2)
#define MAX8998_IRQ_DCINOVPR_MASK (1 << 3)
#define MAX8998_IRQ_CHGRSTF_MASK (1 << 4)
#define MAX8998_IRQ_DONER_MASK (1 << 5)
#define MAX8998_IRQ_CHGFAULT_MASK (1 << 7)
#define MAX8998_IRQ_LOBAT1_MASK (1 << 0)
#define MAX8998_IRQ_LOBAT2_MASK (1 << 1)
/**
* struct max8998_dev - max8998 master device for sub-drivers
* @dev: master device of the chip (can be used to access platform data)
* @i2c: i2c client private data
* @iolock: mutex for serializing io access
* @irqlock: mutex for buslock
* @irq_base: base IRQ number for max8998, required for IRQs
* @irq: generic IRQ number for max8998
* @ono: power onoff IRQ number for max8998
* @irq_masks_cur: currently active value
* @irq_masks_cache: cached hardware value
*/
struct max8998_dev {
struct device *dev;
struct i2c_client *i2c;
struct mutex iolock;
struct mutex irqlock;
int irq_base;
int irq;
int ono;
u8 irq_masks_cur[MAX8998_NUM_IRQ_REGS];
u8 irq_masks_cache[MAX8998_NUM_IRQ_REGS];
};
int max8998_irq_init(struct max8998_dev *max8998);
void max8998_irq_exit(struct max8998_dev *max8998);
extern int max8998_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest);
extern int max8998_bulk_read(struct i2c_client *i2c, u8 reg, int count,
u8 *buf);
extern int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value);
extern int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask);

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@ -1,5 +1,5 @@
/*
* max8698.h - Voltage regulator driver for the Maxim 8998
* max8998.h - Voltage regulator driver for the Maxim 8998
*
* Copyright (C) 2009-2010 Samsung Electrnoics
* Kyungmin Park <kyungmin.park@samsung.com>
@ -66,13 +66,16 @@ struct max8998_regulator_data {
/**
* struct max8998_board - packages regulator init data
* @num_regulators: number of regultors used
* @regulators: array of defined regulators
* @num_regulators: number of regultors used
* @irq_base: base IRQ number for max8998, required for IRQs
* @ono: power onoff IRQ number for max8998
*/
struct max8998_platform_data {
int num_regulators;
struct max8998_regulator_data *regulators;
int num_regulators;
int irq_base;
int ono;
};
#endif /* __LINUX_MFD_MAX8998_H */