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linux/drivers/mfd/max8925-core.c
Haojian Zhuang 68e488d965 mfd: Delay to mask tsc irq in max8925 
There're two IRQ pins output from MAX8925. One is PMIC interrupt, the other
is TSC interrupt. But they're sharing one irq chip.

After initializing MAX8925 interrupts, unexpected TSC interrupt may occur and
it can't be cleared if touch driver isn't loaded.

Now move the operation of masking TSC interrupt behind requesting PMIC
interrupt. If touch driver isn't loaded, this interrupt is always masked.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-05-28 01:37:41 +02:00

659 lines
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/*
* Base driver for Maxim MAX8925
*
* Copyright (C) 2009-2010 Marvell International Ltd.
* Haojian Zhuang <haojian.zhuang@marvell.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max8925.h>
static struct resource backlight_resources[] = {
{
.name = "max8925-backlight",
.start = MAX8925_WLED_MODE_CNTL,
.end = MAX8925_WLED_CNTL,
.flags = IORESOURCE_IO,
},
};
static struct mfd_cell backlight_devs[] = {
{
.name = "max8925-backlight",
.num_resources = 1,
.resources = &backlight_resources[0],
.id = -1,
},
};
static struct resource touch_resources[] = {
{
.name = "max8925-tsc",
.start = MAX8925_TSC_IRQ,
.end = MAX8925_ADC_RES_END,
.flags = IORESOURCE_IO,
},
};
static struct mfd_cell touch_devs[] = {
{
.name = "max8925-touch",
.num_resources = 1,
.resources = &touch_resources[0],
.id = -1,
},
};
static struct resource power_supply_resources[] = {
{
.name = "max8925-power",
.start = MAX8925_CHG_IRQ1,
.end = MAX8925_CHG_IRQ1_MASK,
.flags = IORESOURCE_IO,
},
};
static struct mfd_cell power_devs[] = {
{
.name = "max8925-power",
.num_resources = 1,
.resources = &power_supply_resources[0],
.id = -1,
},
};
static struct resource rtc_resources[] = {
{
.name = "max8925-rtc",
.start = MAX8925_RTC_IRQ,
.end = MAX8925_RTC_IRQ_MASK,
.flags = IORESOURCE_IO,
},
};
static struct mfd_cell rtc_devs[] = {
{
.name = "max8925-rtc",
.num_resources = 1,
.resources = &rtc_resources[0],
.id = -1,
},
};
#define MAX8925_REG_RESOURCE(_start, _end) \
{ \
.start = MAX8925_##_start, \
.end = MAX8925_##_end, \
.flags = IORESOURCE_IO, \
}
static struct resource regulator_resources[] = {
MAX8925_REG_RESOURCE(SDCTL1, SDCTL1),
MAX8925_REG_RESOURCE(SDCTL2, SDCTL2),
MAX8925_REG_RESOURCE(SDCTL3, SDCTL3),
MAX8925_REG_RESOURCE(LDOCTL1, LDOCTL1),
MAX8925_REG_RESOURCE(LDOCTL2, LDOCTL2),
MAX8925_REG_RESOURCE(LDOCTL3, LDOCTL3),
MAX8925_REG_RESOURCE(LDOCTL4, LDOCTL4),
MAX8925_REG_RESOURCE(LDOCTL5, LDOCTL5),
MAX8925_REG_RESOURCE(LDOCTL6, LDOCTL6),
MAX8925_REG_RESOURCE(LDOCTL7, LDOCTL7),
MAX8925_REG_RESOURCE(LDOCTL8, LDOCTL8),
MAX8925_REG_RESOURCE(LDOCTL9, LDOCTL9),
MAX8925_REG_RESOURCE(LDOCTL10, LDOCTL10),
MAX8925_REG_RESOURCE(LDOCTL11, LDOCTL11),
MAX8925_REG_RESOURCE(LDOCTL12, LDOCTL12),
MAX8925_REG_RESOURCE(LDOCTL13, LDOCTL13),
MAX8925_REG_RESOURCE(LDOCTL14, LDOCTL14),
MAX8925_REG_RESOURCE(LDOCTL15, LDOCTL15),
MAX8925_REG_RESOURCE(LDOCTL16, LDOCTL16),
MAX8925_REG_RESOURCE(LDOCTL17, LDOCTL17),
MAX8925_REG_RESOURCE(LDOCTL18, LDOCTL18),
MAX8925_REG_RESOURCE(LDOCTL19, LDOCTL19),
MAX8925_REG_RESOURCE(LDOCTL20, LDOCTL20),
};
#define MAX8925_REG_DEVS(_id) \
{ \
.name = "max8925-regulator", \
.num_resources = 1, \
.resources = &regulator_resources[MAX8925_ID_##_id], \
.id = MAX8925_ID_##_id, \
}
static struct mfd_cell regulator_devs[] = {
MAX8925_REG_DEVS(SD1),
MAX8925_REG_DEVS(SD2),
MAX8925_REG_DEVS(SD3),
MAX8925_REG_DEVS(LDO1),
MAX8925_REG_DEVS(LDO2),
MAX8925_REG_DEVS(LDO3),
MAX8925_REG_DEVS(LDO4),
MAX8925_REG_DEVS(LDO5),
MAX8925_REG_DEVS(LDO6),
MAX8925_REG_DEVS(LDO7),
MAX8925_REG_DEVS(LDO8),
MAX8925_REG_DEVS(LDO9),
MAX8925_REG_DEVS(LDO10),
MAX8925_REG_DEVS(LDO11),
MAX8925_REG_DEVS(LDO12),
MAX8925_REG_DEVS(LDO13),
MAX8925_REG_DEVS(LDO14),
MAX8925_REG_DEVS(LDO15),
MAX8925_REG_DEVS(LDO16),
MAX8925_REG_DEVS(LDO17),
MAX8925_REG_DEVS(LDO18),
MAX8925_REG_DEVS(LDO19),
MAX8925_REG_DEVS(LDO20),
};
enum {
FLAGS_ADC = 1, /* register in ADC component */
FLAGS_RTC, /* register in RTC component */
};
struct max8925_irq_data {
int reg;
int mask_reg;
int enable; /* enable or not */
int offs; /* bit offset in mask register */
int flags;
int tsc_irq;
};
static struct max8925_irq_data max8925_irqs[] = {
[MAX8925_IRQ_VCHG_DC_OVP] = {
.reg = MAX8925_CHG_IRQ1,
.mask_reg = MAX8925_CHG_IRQ1_MASK,
.offs = 1 << 0,
},
[MAX8925_IRQ_VCHG_DC_F] = {
.reg = MAX8925_CHG_IRQ1,
.mask_reg = MAX8925_CHG_IRQ1_MASK,
.offs = 1 << 1,
},
[MAX8925_IRQ_VCHG_DC_R] = {
.reg = MAX8925_CHG_IRQ1,
.mask_reg = MAX8925_CHG_IRQ1_MASK,
.offs = 1 << 2,
},
[MAX8925_IRQ_VCHG_USB_OVP] = {
.reg = MAX8925_CHG_IRQ1,
.mask_reg = MAX8925_CHG_IRQ1_MASK,
.offs = 1 << 3,
},
[MAX8925_IRQ_VCHG_USB_F] = {
.reg = MAX8925_CHG_IRQ1,
.mask_reg = MAX8925_CHG_IRQ1_MASK,
.offs = 1 << 4,
},
[MAX8925_IRQ_VCHG_USB_R] = {
.reg = MAX8925_CHG_IRQ1,
.mask_reg = MAX8925_CHG_IRQ1_MASK,
.offs = 1 << 5,
},
[MAX8925_IRQ_VCHG_THM_OK_R] = {
.reg = MAX8925_CHG_IRQ2,
.mask_reg = MAX8925_CHG_IRQ2_MASK,
.offs = 1 << 0,
},
[MAX8925_IRQ_VCHG_THM_OK_F] = {
.reg = MAX8925_CHG_IRQ2,
.mask_reg = MAX8925_CHG_IRQ2_MASK,
.offs = 1 << 1,
},
[MAX8925_IRQ_VCHG_SYSLOW_F] = {
.reg = MAX8925_CHG_IRQ2,
.mask_reg = MAX8925_CHG_IRQ2_MASK,
.offs = 1 << 2,
},
[MAX8925_IRQ_VCHG_SYSLOW_R] = {
.reg = MAX8925_CHG_IRQ2,
.mask_reg = MAX8925_CHG_IRQ2_MASK,
.offs = 1 << 3,
},
[MAX8925_IRQ_VCHG_RST] = {
.reg = MAX8925_CHG_IRQ2,
.mask_reg = MAX8925_CHG_IRQ2_MASK,
.offs = 1 << 4,
},
[MAX8925_IRQ_VCHG_DONE] = {
.reg = MAX8925_CHG_IRQ2,
.mask_reg = MAX8925_CHG_IRQ2_MASK,
.offs = 1 << 5,
},
[MAX8925_IRQ_VCHG_TOPOFF] = {
.reg = MAX8925_CHG_IRQ2,
.mask_reg = MAX8925_CHG_IRQ2_MASK,
.offs = 1 << 6,
},
[MAX8925_IRQ_VCHG_TMR_FAULT] = {
.reg = MAX8925_CHG_IRQ2,
.mask_reg = MAX8925_CHG_IRQ2_MASK,
.offs = 1 << 7,
},
[MAX8925_IRQ_GPM_RSTIN] = {
.reg = MAX8925_ON_OFF_IRQ1,
.mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
.offs = 1 << 0,
},
[MAX8925_IRQ_GPM_MPL] = {
.reg = MAX8925_ON_OFF_IRQ1,
.mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
.offs = 1 << 1,
},
[MAX8925_IRQ_GPM_SW_3SEC] = {
.reg = MAX8925_ON_OFF_IRQ1,
.mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
.offs = 1 << 2,
},
[MAX8925_IRQ_GPM_EXTON_F] = {
.reg = MAX8925_ON_OFF_IRQ1,
.mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
.offs = 1 << 3,
},
[MAX8925_IRQ_GPM_EXTON_R] = {
.reg = MAX8925_ON_OFF_IRQ1,
.mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
.offs = 1 << 4,
},
[MAX8925_IRQ_GPM_SW_1SEC] = {
.reg = MAX8925_ON_OFF_IRQ1,
.mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
.offs = 1 << 5,
},
[MAX8925_IRQ_GPM_SW_F] = {
.reg = MAX8925_ON_OFF_IRQ1,
.mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
.offs = 1 << 6,
},
[MAX8925_IRQ_GPM_SW_R] = {
.reg = MAX8925_ON_OFF_IRQ1,
.mask_reg = MAX8925_ON_OFF_IRQ1_MASK,
.offs = 1 << 7,
},
[MAX8925_IRQ_GPM_SYSCKEN_F] = {
.reg = MAX8925_ON_OFF_IRQ2,
.mask_reg = MAX8925_ON_OFF_IRQ2_MASK,
.offs = 1 << 0,
},
[MAX8925_IRQ_GPM_SYSCKEN_R] = {
.reg = MAX8925_ON_OFF_IRQ2,
.mask_reg = MAX8925_ON_OFF_IRQ2_MASK,
.offs = 1 << 1,
},
[MAX8925_IRQ_RTC_ALARM1] = {
.reg = MAX8925_RTC_IRQ,
.mask_reg = MAX8925_RTC_IRQ_MASK,
.offs = 1 << 2,
.flags = FLAGS_RTC,
},
[MAX8925_IRQ_RTC_ALARM0] = {
.reg = MAX8925_RTC_IRQ,
.mask_reg = MAX8925_RTC_IRQ_MASK,
.offs = 1 << 3,
.flags = FLAGS_RTC,
},
[MAX8925_IRQ_TSC_STICK] = {
.reg = MAX8925_TSC_IRQ,
.mask_reg = MAX8925_TSC_IRQ_MASK,
.offs = 1 << 0,
.flags = FLAGS_ADC,
.tsc_irq = 1,
},
[MAX8925_IRQ_TSC_NSTICK] = {
.reg = MAX8925_TSC_IRQ,
.mask_reg = MAX8925_TSC_IRQ_MASK,
.offs = 1 << 1,
.flags = FLAGS_ADC,
.tsc_irq = 1,
},
};
static inline struct max8925_irq_data *irq_to_max8925(struct max8925_chip *chip,
int irq)
{
return &max8925_irqs[irq - chip->irq_base];
}
static irqreturn_t max8925_irq(int irq, void *data)
{
struct max8925_chip *chip = data;
struct max8925_irq_data *irq_data;
struct i2c_client *i2c;
int read_reg = -1, value = 0;
int i;
for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
irq_data = &max8925_irqs[i];
/* TSC IRQ should be serviced in max8925_tsc_irq() */
if (irq_data->tsc_irq)
continue;
if (irq_data->flags == FLAGS_RTC)
i2c = chip->rtc;
else if (irq_data->flags == FLAGS_ADC)
i2c = chip->adc;
else
i2c = chip->i2c;
if (read_reg != irq_data->reg) {
read_reg = irq_data->reg;
value = max8925_reg_read(i2c, irq_data->reg);
}
if (value & irq_data->enable)
handle_nested_irq(chip->irq_base + i);
}
return IRQ_HANDLED;
}
static irqreturn_t max8925_tsc_irq(int irq, void *data)
{
struct max8925_chip *chip = data;
struct max8925_irq_data *irq_data;
struct i2c_client *i2c;
int read_reg = -1, value = 0;
int i;
for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
irq_data = &max8925_irqs[i];
/* non TSC IRQ should be serviced in max8925_irq() */
if (!irq_data->tsc_irq)
continue;
if (irq_data->flags == FLAGS_RTC)
i2c = chip->rtc;
else if (irq_data->flags == FLAGS_ADC)
i2c = chip->adc;
else
i2c = chip->i2c;
if (read_reg != irq_data->reg) {
read_reg = irq_data->reg;
value = max8925_reg_read(i2c, irq_data->reg);
}
if (value & irq_data->enable)
handle_nested_irq(chip->irq_base + i);
}
return IRQ_HANDLED;
}
static void max8925_irq_lock(unsigned int irq)
{
struct max8925_chip *chip = get_irq_chip_data(irq);
mutex_lock(&chip->irq_lock);
}
static void max8925_irq_sync_unlock(unsigned int irq)
{
struct max8925_chip *chip = get_irq_chip_data(irq);
struct max8925_irq_data *irq_data;
static unsigned char cache_chg[2] = {0xff, 0xff};
static unsigned char cache_on[2] = {0xff, 0xff};
static unsigned char cache_rtc = 0xff, cache_tsc = 0xff;
unsigned char irq_chg[2], irq_on[2];
unsigned char irq_rtc, irq_tsc;
int i;
/* Load cached value. In initial, all IRQs are masked */
irq_chg[0] = cache_chg[0];
irq_chg[1] = cache_chg[1];
irq_on[0] = cache_on[0];
irq_on[1] = cache_on[1];
irq_rtc = cache_rtc;
irq_tsc = cache_tsc;
for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
irq_data = &max8925_irqs[i];
switch (irq_data->mask_reg) {
case MAX8925_CHG_IRQ1_MASK:
irq_chg[0] &= irq_data->enable;
break;
case MAX8925_CHG_IRQ2_MASK:
irq_chg[1] &= irq_data->enable;
break;
case MAX8925_ON_OFF_IRQ1_MASK:
irq_on[0] &= irq_data->enable;
break;
case MAX8925_ON_OFF_IRQ2_MASK:
irq_on[1] &= irq_data->enable;
break;
case MAX8925_RTC_IRQ_MASK:
irq_rtc &= irq_data->enable;
break;
case MAX8925_TSC_IRQ_MASK:
irq_tsc &= irq_data->enable;
break;
default:
dev_err(chip->dev, "wrong IRQ\n");
break;
}
}
/* update mask into registers */
if (cache_chg[0] != irq_chg[0]) {
cache_chg[0] = irq_chg[0];
max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ1_MASK,
irq_chg[0]);
}
if (cache_chg[1] != irq_chg[1]) {
cache_chg[1] = irq_chg[1];
max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ2_MASK,
irq_chg[1]);
}
if (cache_on[0] != irq_on[0]) {
cache_on[0] = irq_on[0];
max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ1_MASK,
irq_on[0]);
}
if (cache_on[1] != irq_on[1]) {
cache_on[1] = irq_on[1];
max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ2_MASK,
irq_on[1]);
}
if (cache_rtc != irq_rtc) {
cache_rtc = irq_rtc;
max8925_reg_write(chip->rtc, MAX8925_RTC_IRQ_MASK, irq_rtc);
}
if (cache_tsc != irq_tsc) {
cache_tsc = irq_tsc;
max8925_reg_write(chip->adc, MAX8925_TSC_IRQ_MASK, irq_tsc);
}
mutex_unlock(&chip->irq_lock);
}
static void max8925_irq_enable(unsigned int irq)
{
struct max8925_chip *chip = get_irq_chip_data(irq);
max8925_irqs[irq - chip->irq_base].enable
= max8925_irqs[irq - chip->irq_base].offs;
}
static void max8925_irq_disable(unsigned int irq)
{
struct max8925_chip *chip = get_irq_chip_data(irq);
max8925_irqs[irq - chip->irq_base].enable = 0;
}
static struct irq_chip max8925_irq_chip = {
.name = "max8925",
.bus_lock = max8925_irq_lock,
.bus_sync_unlock = max8925_irq_sync_unlock,
.enable = max8925_irq_enable,
.disable = max8925_irq_disable,
};
static int max8925_irq_init(struct max8925_chip *chip, int irq,
struct max8925_platform_data *pdata)
{
unsigned long flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
struct irq_desc *desc;
int i, ret;
int __irq;
if (!pdata || !pdata->irq_base) {
dev_warn(chip->dev, "No interrupt support on IRQ base\n");
return -EINVAL;
}
/* clear all interrupts */
max8925_reg_read(chip->i2c, MAX8925_CHG_IRQ1);
max8925_reg_read(chip->i2c, MAX8925_CHG_IRQ2);
max8925_reg_read(chip->i2c, MAX8925_ON_OFF_IRQ1);
max8925_reg_read(chip->i2c, MAX8925_ON_OFF_IRQ2);
max8925_reg_read(chip->rtc, MAX8925_RTC_IRQ);
max8925_reg_read(chip->adc, MAX8925_TSC_IRQ);
/* mask all interrupts except for TSC */
max8925_reg_write(chip->rtc, MAX8925_ALARM0_CNTL, 0);
max8925_reg_write(chip->rtc, MAX8925_ALARM1_CNTL, 0);
max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ1_MASK, 0xff);
max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ2_MASK, 0xff);
max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ1_MASK, 0xff);
max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ2_MASK, 0xff);
max8925_reg_write(chip->rtc, MAX8925_RTC_IRQ_MASK, 0xff);
mutex_init(&chip->irq_lock);
chip->core_irq = irq;
chip->irq_base = pdata->irq_base;
desc = irq_to_desc(chip->core_irq);
/* register with genirq */
for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
__irq = i + chip->irq_base;
set_irq_chip_data(__irq, chip);
set_irq_chip_and_handler(__irq, &max8925_irq_chip,
handle_edge_irq);
set_irq_nested_thread(__irq, 1);
#ifdef CONFIG_ARM
set_irq_flags(__irq, IRQF_VALID);
#else
set_irq_noprobe(__irq);
#endif
}
if (!irq) {
dev_warn(chip->dev, "No interrupt support on core IRQ\n");
goto tsc_irq;
}
ret = request_threaded_irq(irq, NULL, max8925_irq, flags,
"max8925", chip);
if (ret) {
dev_err(chip->dev, "Failed to request core IRQ: %d\n", ret);
chip->core_irq = 0;
}
tsc_irq:
/* mask TSC interrupt */
max8925_reg_write(chip->adc, MAX8925_TSC_IRQ_MASK, 0x0f);
if (!pdata->tsc_irq) {
dev_warn(chip->dev, "No interrupt support on TSC IRQ\n");
return 0;
}
chip->tsc_irq = pdata->tsc_irq;
ret = request_threaded_irq(chip->tsc_irq, NULL, max8925_tsc_irq,
flags, "max8925-tsc", chip);
if (ret) {
dev_err(chip->dev, "Failed to request TSC IRQ: %d\n", ret);
chip->tsc_irq = 0;
}
return 0;
}
int __devinit max8925_device_init(struct max8925_chip *chip,
struct max8925_platform_data *pdata)
{
int ret;
max8925_irq_init(chip, chip->i2c->irq, pdata);
if (pdata && (pdata->power || pdata->touch)) {
/* enable ADC to control internal reference */
max8925_set_bits(chip->i2c, MAX8925_RESET_CNFG, 1, 1);
/* enable internal reference for ADC */
max8925_set_bits(chip->adc, MAX8925_TSC_CNFG1, 3, 2);
/* check for internal reference IRQ */
do {
ret = max8925_reg_read(chip->adc, MAX8925_TSC_IRQ);
} while (ret & MAX8925_NREF_OK);
/* enaable ADC scheduler, interval is 1 second */
max8925_set_bits(chip->adc, MAX8925_ADC_SCHED, 3, 2);
}
/* enable Momentary Power Loss */
max8925_set_bits(chip->rtc, MAX8925_MPL_CNTL, 1 << 4, 1 << 4);
ret = mfd_add_devices(chip->dev, 0, &rtc_devs[0],
ARRAY_SIZE(rtc_devs),
&rtc_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add rtc subdev\n");
goto out;
}
if (pdata && pdata->regulator[0]) {
ret = mfd_add_devices(chip->dev, 0, &regulator_devs[0],
ARRAY_SIZE(regulator_devs),
&regulator_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add regulator subdev\n");
goto out_dev;
}
}
if (pdata && pdata->backlight) {
ret = mfd_add_devices(chip->dev, 0, &backlight_devs[0],
ARRAY_SIZE(backlight_devs),
&backlight_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add backlight subdev\n");
goto out_dev;
}
}
if (pdata && pdata->power) {
ret = mfd_add_devices(chip->dev, 0, &power_devs[0],
ARRAY_SIZE(power_devs),
&power_supply_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add power supply "
"subdev\n");
goto out_dev;
}
}
if (pdata && pdata->touch) {
ret = mfd_add_devices(chip->dev, 0, &touch_devs[0],
ARRAY_SIZE(touch_devs),
&touch_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add touch subdev\n");
goto out_dev;
}
}
return 0;
out_dev:
mfd_remove_devices(chip->dev);
out:
return ret;
}
void __devexit max8925_device_exit(struct max8925_chip *chip)
{
if (chip->core_irq)
free_irq(chip->core_irq, chip);
if (chip->tsc_irq)
free_irq(chip->tsc_irq, chip);
mfd_remove_devices(chip->dev);
}
MODULE_DESCRIPTION("PMIC Driver for Maxim MAX8925");
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com");
MODULE_LICENSE("GPL");
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