/*
* DA9052 interrupt support
*
* Author: Fabio Estevam <fabio.estevam@freescale.com>
* Based on arizona-irq.c, which is:
*
* Copyright 2012 Wolfson Microelectronics plc
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.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/device.h>
#include <linux/delay.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/mfd/da9052/da9052.h>
#include <linux/mfd/da9052/reg.h>
#define DA9052_NUM_IRQ_REGS 4
#define DA9052_IRQ_MASK_POS_1 0x01
#define DA9052_IRQ_MASK_POS_2 0x02
#define DA9052_IRQ_MASK_POS_3 0x04
#define DA9052_IRQ_MASK_POS_4 0x08
#define DA9052_IRQ_MASK_POS_5 0x10
#define DA9052_IRQ_MASK_POS_6 0x20
#define DA9052_IRQ_MASK_POS_7 0x40
#define DA9052_IRQ_MASK_POS_8 0x80
static const struct regmap_irq da9052_irqs[] = {
[DA9052_IRQ_DCIN] = {
.reg_offset = 0,
.mask = DA9052_IRQ_MASK_POS_1,
},
[DA9052_IRQ_VBUS] = {
.reg_offset = 0,
.mask = DA9052_IRQ_MASK_POS_2,
},
[DA9052_IRQ_DCINREM] = {
.reg_offset = 0,
.mask = DA9052_IRQ_MASK_POS_3,
},
[DA9052_IRQ_VBUSREM] = {
.reg_offset = 0,
.mask = DA9052_IRQ_MASK_POS_4,
},
[DA9052_IRQ_VDDLOW] = {
.reg_offset = 0,
.mask = DA9052_IRQ_MASK_POS_5,
},
[DA9052_IRQ_ALARM] = {
.reg_offset = 0,
.mask = DA9052_IRQ_MASK_POS_6,
},
[DA9052_IRQ_SEQRDY] = {
.reg_offset = 0,
.mask = DA9052_IRQ_MASK_POS_7,
},
[DA9052_IRQ_COMP1V2] = {
.reg_offset = 0,
.mask = DA9052_IRQ_MASK_POS_8,
},
[DA9052_IRQ_NONKEY] = {
.reg_offset = 1,
.mask = DA9052_IRQ_MASK_POS_1,
},
[DA9052_IRQ_IDFLOAT] = {
.reg_offset = 1,
.mask = DA9052_IRQ_MASK_POS_2,
},
[DA9052_IRQ_IDGND] = {
.reg_offset = 1,
.mask = DA9052_IRQ_MASK_POS_3,
},
[DA9052_IRQ_CHGEND] = {
.reg_offset = 1,
.mask = DA9052_IRQ_MASK_POS_4,
},
[DA9052_IRQ_TBAT] = {
.reg_offset = 1,
.mask = DA9052_IRQ_MASK_POS_5,
},
[DA9052_IRQ_ADC_EOM] = {
.reg_offset = 1,
.mask = DA9052_IRQ_MASK_POS_6,
},
[DA9052_IRQ_PENDOWN] = {
.reg_offset = 1,
.mask = DA9052_IRQ_MASK_POS_7,
},
[DA9052_IRQ_TSIREADY] = {
.reg_offset = 1,
.mask = DA9052_IRQ_MASK_POS_8,
},
[DA9052_IRQ_GPI0] = {
.reg_offset = 2,
.mask = DA9052_IRQ_MASK_POS_1,
},
[DA9052_IRQ_GPI1] = {
.reg_offset = 2,
.mask = DA9052_IRQ_MASK_POS_2,
},
[DA9052_IRQ_GPI2] = {
.reg_offset = 2,
.mask = DA9052_IRQ_MASK_POS_3,
},
[DA9052_IRQ_GPI3] = {
.reg_offset = 2,
.mask = DA9052_IRQ_MASK_POS_4,
},
[DA9052_IRQ_GPI4] = {
.reg_offset = 2,
.mask = DA9052_IRQ_MASK_POS_5,
},
[DA9052_IRQ_GPI5] = {
.reg_offset = 2,
.mask = DA9052_IRQ_MASK_POS_6,
},
[DA9052_IRQ_GPI6] = {
.reg_offset = 2,
.mask = DA9052_IRQ_MASK_POS_7,
},
[DA9052_IRQ_GPI7] = {
.reg_offset = 2,
.mask = DA9052_IRQ_MASK_POS_8,
},
[DA9052_IRQ_GPI8] = {
.reg_offset = 3,
.mask = DA9052_IRQ_MASK_POS_1,
},
[DA9052_IRQ_GPI9] = {
.reg_offset = 3,
.mask = DA9052_IRQ_MASK_POS_2,
},
[DA9052_IRQ_GPI10] = {
.reg_offset = 3,
.mask = DA9052_IRQ_MASK_POS_3,
},
[DA9052_IRQ_GPI11] = {
.reg_offset = 3,
.mask = DA9052_IRQ_MASK_POS_4,
},
[DA9052_IRQ_GPI12] = {
.reg_offset = 3,
.mask = DA9052_IRQ_MASK_POS_5,
},
[DA9052_IRQ_GPI13] = {
.reg_offset = 3,
.mask = DA9052_IRQ_MASK_POS_6,
},
[DA9052_IRQ_GPI14] = {
.reg_offset = 3,
.mask = DA9052_IRQ_MASK_POS_7,
},
[DA9052_IRQ_GPI15] = {
.reg_offset = 3,
.mask = DA9052_IRQ_MASK_POS_8,
},
};
static const struct regmap_irq_chip da9052_regmap_irq_chip = {
.name = "da9052_irq",
.status_base = DA9052_EVENT_A_REG,
.mask_base = DA9052_IRQ_MASK_A_REG,
.ack_base = DA9052_EVENT_A_REG,
.num_regs = DA9052_NUM_IRQ_REGS,
.irqs = da9052_irqs,
.num_irqs = ARRAY_SIZE(da9052_irqs),
};
static int da9052_map_irq(struct da9052 *da9052, int irq)
{
return regmap_irq_get_virq(da9052->irq_data, irq);
}
int da9052_enable_irq(struct da9052 *da9052, int irq)
{
irq = da9052_map_irq(da9052, irq);
if (irq < 0)
return irq;
enable_irq(irq);
return 0;
}
EXPORT_SYMBOL_GPL(da9052_enable_irq);
int da9052_disable_irq(struct da9052 *da9052, int irq)
{
irq = da9052_map_irq(da9052, irq);
if (irq < 0)
return irq;
disable_irq(irq);
return 0;
}
EXPORT_SYMBOL_GPL(da9052_disable_irq);
int da9052_disable_irq_nosync(struct da9052 *da9052, int irq)
{
irq = da9052_map_irq(da9052, irq);
if (irq < 0)
return irq;
disable_irq_nosync(irq);
return 0;
}
EXPORT_SYMBOL_GPL(da9052_disable_irq_nosync);
int da9052_request_irq(struct da9052 *da9052, int irq, char *name,
irq_handler_t handler, void *data)
{
irq = da9052_map_irq(da9052, irq);
if (irq < 0)
return irq;
return request_threaded_irq(irq, NULL, handler,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
name, data);
}
EXPORT_SYMBOL_GPL(da9052_request_irq);
void da9052_free_irq(struct da9052 *da9052, int irq, void *data)
{
irq = da9052_map_irq(da9052, irq);
if (irq < 0)
return;
free_irq(irq, data);
}
EXPORT_SYMBOL_GPL(da9052_free_irq);
static irqreturn_t da9052_auxadc_irq(int irq, void *irq_data)
{
struct da9052 *da9052 = irq_data;
complete(&da9052->done);
return IRQ_HANDLED;
}
int da9052_irq_init(struct da9052 *da9052)
{
int ret;
ret = regmap_add_irq_chip(da9052->regmap, da9052->chip_irq,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
-1, &da9052_regmap_irq_chip,
&da9052->irq_data);
if (ret < 0) {
dev_err(da9052->dev, "regmap_add_irq_chip failed: %d\n", ret);
goto regmap_err;
}
enable_irq_wake(da9052->chip_irq);
ret = da9052_request_irq(da9052, DA9052_IRQ_ADC_EOM, "adc-irq",
da9052_auxadc_irq, da9052);
if (ret != 0) {
dev_err(da9052->dev, "DA9052_IRQ_ADC_EOM failed: %d\n", ret);
goto request_irq_err;
}
return 0;
request_irq_err:
regmap_del_irq_chip(da9052->chip_irq, da9052->irq_data);
regmap_err:
return ret;
}
int da9052_irq_exit(struct da9052 *da9052)
{
da9052_free_irq(da9052, DA9052_IRQ_ADC_EOM, da9052);
regmap_del_irq_chip(da9052->chip_irq, da9052->irq_data);
return 0;
}
