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extcon: max14577: Add support for MAX77836 

Add support for MAX77836 chipset to the max14577 extcon driver. The
MAX77836 MUIC has additional interrupts (VIDRM, ADC1K) so IRQ handling
is split up into two functions: max14577_parse_irq() and
max77836_parse_irq().

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
hifive-unleashed-5.1
Krzysztof Kozlowski 2014-04-14 11:17:19 +02:00 committed by Lee Jones
parent aee2a57c74
commit 4706a5253b
4 changed files with 96 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

109
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
@ -62,6 +63,19 @@ static struct max14577_muic_irq max14577_muic_irqs[] = {
{ 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;
@ -529,10 +543,61 @@ static void max14577_muic_irq_work(struct work_struct *work)
return;
}
/*
* 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)
{
switch (irq_type) {
case MAX14577_IRQ_INT1_ADC:
case MAX14577_IRQ_INT1_ADCLOW:
case MAX14577_IRQ_INT1_ADCERR:
/* Handle all of accessory except for
type of charger accessory */
info->irq_adc = true;
return 1;
case MAX14577_IRQ_INT2_CHGTYP:
case MAX14577_IRQ_INT2_CHGDETRUN:
case MAX14577_IRQ_INT2_DCDTMR:
case MAX14577_IRQ_INT2_DBCHG:
case MAX14577_IRQ_INT2_VBVOLT:
/* Handle charger accessory */
info->irq_chg = true;
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.
@ -544,23 +609,17 @@ static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
if (irq == info->muic_irqs[i].virq)
irq_type = info->muic_irqs[i].irq;
switch (irq_type) {
case MAX14577_IRQ_INT1_ADC:
case MAX14577_IRQ_INT1_ADCLOW:
case MAX14577_IRQ_INT1_ADCERR:
/* Handle all of accessory except for
type of charger accessory */
info->irq_adc = true;
break;
case MAX14577_IRQ_INT2_CHGTYP:
case MAX14577_IRQ_INT2_CHGDETRUN:
case MAX14577_IRQ_INT2_DCDTMR:
case MAX14577_IRQ_INT2_DBCHG:
case MAX14577_IRQ_INT2_VBVOLT:
/* Handle charger accessory */
info->irq_chg = true;
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;
@ -646,6 +705,10 @@ 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;
@ -744,6 +807,13 @@ 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 = "max14577-muic",
@ -751,11 +821,12 @@ static struct platform_driver max14577_muic_driver = {
},
.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");

1
drivers/mfd/max14577.c
View File

@ -147,6 +147,7 @@ static const struct regmap_irq max77836_muic_irqs[] = {
{ .reg_offset = 0, .mask = MAX14577_INT1_ADC_MASK, },
{ .reg_offset = 0, .mask = MAX14577_INT1_ADCLOW_MASK, },
{ .reg_offset = 0, .mask = MAX14577_INT1_ADCERR_MASK, },
{ .reg_offset = 0, .mask = MAX77836_INT1_ADC1K_MASK, },
/* INT2 interrupts */
{ .reg_offset = 1, .mask = MAX14577_INT2_CHGTYP_MASK, },
{ .reg_offset = 1, .mask = MAX14577_INT2_CHGDETRUN_MASK, },

3
include/linux/mfd/max14577-private.h
View File

@ -87,6 +87,7 @@ enum max14577_muic_charger_type {
#define MAX14577_INT1_ADC_MASK BIT(0)
#define MAX14577_INT1_ADCLOW_MASK BIT(1)
#define MAX14577_INT1_ADCERR_MASK BIT(2)
#define MAX77836_INT1_ADC1K_MASK BIT(3)
#define MAX14577_INT2_CHGTYP_MASK BIT(0)
#define MAX14577_INT2_CHGDETRUN_MASK BIT(1)
@ -332,6 +333,7 @@ enum max14577_irq {
MAX14577_IRQ_INT1_ADC,
MAX14577_IRQ_INT1_ADCLOW,
MAX14577_IRQ_INT1_ADCERR,
MAX77836_IRQ_INT1_ADC1K,
/* INT2 */
MAX14577_IRQ_INT2_CHGTYP,
@ -339,6 +341,7 @@ enum max14577_irq {
MAX14577_IRQ_INT2_DCDTMR,
MAX14577_IRQ_INT2_DBCHG,
MAX14577_IRQ_INT2_VBVOLT,
MAX77836_IRQ_INT2_VIDRM,
/* INT3 */
MAX14577_IRQ_INT3_EOC,