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Merge tag 'ib-mfd-extcon-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd into HEAD

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Immutable branch between MFD and Extcon due for v3.16 merge-window.
This commit is contained in:
Chanwoo Choi
2014-04-24 17:21:58 +09:00
parent bf9509e032 8a82b408ac
commit a55d952a2b
8 changed files with 836 additions and 188 deletions
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4
drivers/extcon/Kconfig
View File

@@ -28,13 +28,13 @@ config EXTCON_ADC_JACK
Say Y here to enable extcon device driver based on ADC values.
config EXTCON_MAX14577
tristate "MAX14577 EXTCON Support"
tristate "MAX14577/77836 EXTCON Support"
depends on MFD_MAX14577
select IRQ_DOMAIN
select REGMAP_I2C
help
If you say yes here you get support for the MUIC device of
Maxim MAX14577 PMIC. The MAX14577 MUIC is a USB port accessory
Maxim MAX14577/77836. The MAX14577/77836 MUIC is a USB port accessory
detector and switch.
config EXTCON_MAX77693

176
drivers/extcon/extcon-max14577.c
View File

@@ -1,8 +1,9 @@
/*
* extcon-max14577.c - MAX14577 extcon driver to support MAX14577 MUIC
* extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC
*
* Copyright (C) 2013 Samsung Electrnoics
* Copyright (C) 2013,2014 Samsung Electrnoics
* Chanwoo Choi <cw00.choi@samsung.com>
* Krzysztof Kozlowski <k.kozlowski@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
@@ -24,7 +25,6 @@
#include <linux/mfd/max14577-private.h>
#include <linux/extcon.h>
#define DEV_NAME "max14577-muic"
#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */
enum max14577_muic_adc_debounce_time {
@@ -40,6 +40,42 @@ enum max14577_muic_status {
MAX14577_MUIC_STATUS_END,
};
/**
* struct max14577_muic_irq
* @irq: the index of irq list of MUIC device.
* @name: the name of irq.
* @virq: the virtual irq to use irq domain
*/
struct max14577_muic_irq {
unsigned int irq;
const char *name;
unsigned int virq;
};
static struct max14577_muic_irq max14577_muic_irqs[] = {
{ MAX14577_IRQ_INT1_ADC, "muic-ADC" },
{ MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" },
{ MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" },
{ MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
{ MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" },
{ MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
{ MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" },
{ MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
};
static struct max14577_muic_irq max77836_muic_irqs[] = {
{ MAX14577_IRQ_INT1_ADC, "muic-ADC" },
{ MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" },
{ MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" },
{ MAX77836_IRQ_INT1_ADC1K, "muic-ADC1K" },
{ MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
{ MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" },
{ MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
{ MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" },
{ MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
{ MAX77836_IRQ_INT2_VIDRM, "muic-VIDRM" },
};
struct max14577_muic_info {
struct device *dev;
struct max14577 *max14577;
@@ -48,6 +84,8 @@ struct max14577_muic_info {
int prev_chg_type;
u8 status[MAX14577_MUIC_STATUS_END];
struct max14577_muic_irq *muic_irqs;
unsigned int muic_irqs_num;
bool irq_adc;
bool irq_chg;
struct work_struct irq_work;
@@ -74,29 +112,6 @@ enum max14577_muic_cable_group {
MAX14577_CABLE_GROUP_CHG,
};
/**
* struct max14577_muic_irq
* @irq: the index of irq list of MUIC device.
* @name: the name of irq.
* @virq: the virtual irq to use irq domain
*/
struct max14577_muic_irq {
unsigned int irq;
const char *name;
unsigned int virq;
};
static struct max14577_muic_irq muic_irqs[] = {
{ MAX14577_IRQ_INT1_ADC, "muic-ADC" },
{ MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" },
{ MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" },
{ MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
{ MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" },
{ MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
{ MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" },
{ MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
};
/* Define supported accessory type */
enum max14577_muic_acc_type {
MAX14577_MUIC_ADC_GROUND = 0x0,
@@ -528,21 +543,12 @@ static void max14577_muic_irq_work(struct work_struct *work)
return;
}
static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
/*
* Sets irq_adc or irq_chg in max14577_muic_info and returns 1.
* Returns 0 if irq_type does not match registered IRQ for this device type.
*/
static int max14577_parse_irq(struct max14577_muic_info *info, int irq_type)
{
struct max14577_muic_info *info = data;
int i, irq_type = -1;
/*
* We may be called multiple times for different nested IRQ-s.
* Including changes in INT1_ADC and INT2_CGHTYP at once.
* However we only need to know whether it was ADC, charger
* or both interrupts so decode IRQ and turn on proper flags.
*/
for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
if (irq == muic_irqs[i].virq)
irq_type = muic_irqs[i].irq;
switch (irq_type) {
case MAX14577_IRQ_INT1_ADC:
case MAX14577_IRQ_INT1_ADCLOW:
@@ -550,7 +556,7 @@ static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
/* Handle all of accessory except for
type of charger accessory */
info->irq_adc = true;
break;
return 1;
case MAX14577_IRQ_INT2_CHGTYP:
case MAX14577_IRQ_INT2_CHGDETRUN:
case MAX14577_IRQ_INT2_DCDTMR:
@@ -558,8 +564,62 @@ static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
case MAX14577_IRQ_INT2_VBVOLT:
/* Handle charger accessory */
info->irq_chg = true;
break;
return 1;
default:
return 0;
}
}
/*
* Sets irq_adc or irq_chg in max14577_muic_info and returns 1.
* Returns 0 if irq_type does not match registered IRQ for this device type.
*/
static int max77836_parse_irq(struct max14577_muic_info *info, int irq_type)
{
/* First check common max14577 interrupts */
if (max14577_parse_irq(info, irq_type))
return 1;
switch (irq_type) {
case MAX77836_IRQ_INT1_ADC1K:
info->irq_adc = true;
return 1;
case MAX77836_IRQ_INT2_VIDRM:
/* Handle charger accessory */
info->irq_chg = true;
return 1;
default:
return 0;
}
}
static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
{
struct max14577_muic_info *info = data;
int i, irq_type = -1;
bool irq_parsed;
/*
* We may be called multiple times for different nested IRQ-s.
* Including changes in INT1_ADC and INT2_CGHTYP at once.
* However we only need to know whether it was ADC, charger
* or both interrupts so decode IRQ and turn on proper flags.
*/
for (i = 0; i < info->muic_irqs_num; i++)
if (irq == info->muic_irqs[i].virq)
irq_type = info->muic_irqs[i].irq;
switch (info->max14577->dev_type) {
case MAXIM_DEVICE_TYPE_MAX77836:
irq_parsed = max77836_parse_irq(info, irq_type);
break;
case MAXIM_DEVICE_TYPE_MAX14577:
default:
irq_parsed = max14577_parse_irq(info, irq_type);
break;
}
if (!irq_parsed) {
dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n",
irq_type);
return IRQ_HANDLED;
@@ -644,9 +704,20 @@ static int max14577_muic_probe(struct platform_device *pdev)
INIT_WORK(&info->irq_work, max14577_muic_irq_work);
switch (max14577->dev_type) {
case MAXIM_DEVICE_TYPE_MAX77836:
info->muic_irqs = max77836_muic_irqs;
info->muic_irqs_num = ARRAY_SIZE(max77836_muic_irqs);
break;
case MAXIM_DEVICE_TYPE_MAX14577:
default:
info->muic_irqs = max14577_muic_irqs;
info->muic_irqs_num = ARRAY_SIZE(max14577_muic_irqs);
}
/* Support irq domain for max14577 MUIC device */
for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
struct max14577_muic_irq *muic_irq = &muic_irqs[i];
for (i = 0; i < info->muic_irqs_num; i++) {
struct max14577_muic_irq *muic_irq = &info->muic_irqs[i];
unsigned int virq = 0;
virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq);
@@ -673,7 +744,8 @@ static int max14577_muic_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
return -ENOMEM;
}
info->edev->name = DEV_NAME;
info->edev->name = dev_name(&pdev->dev);
info->edev->supported_cable = max14577_extcon_cable;
ret = extcon_dev_register(info->edev);
if (ret) {
@@ -735,18 +807,26 @@ static int max14577_muic_remove(struct platform_device *pdev)
return 0;
}
static const struct platform_device_id max14577_muic_id[] = {
{ "max14577-muic", MAXIM_DEVICE_TYPE_MAX14577, },
{ "max77836-muic", MAXIM_DEVICE_TYPE_MAX77836, },
{ }
};
MODULE_DEVICE_TABLE(platform, max14577_muic_id);
static struct platform_driver max14577_muic_driver = {
.driver = {
.name = DEV_NAME,
.name = "max14577-muic",
.owner = THIS_MODULE,
},
.probe = max14577_muic_probe,
.remove = max14577_muic_remove,
.id_table = max14577_muic_id,
};
module_platform_driver(max14577_muic_driver);
MODULE_DESCRIPTION("MAXIM 14577 Extcon driver");
MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
MODULE_DESCRIPTION("Maxim 14577/77836 Extcon driver");
MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <k.kozlowski@samsung.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:extcon-max14577");