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linux-next/drivers/power/da9150-charger.c
Krzysztof Kozlowski 297d716f62 power_supply: Change ownership from driver to core
Change the ownership of power_supply structure from each driver
implementing the class to the power supply core.

The patch changes power_supply_register() function thus all drivers
implementing power supply class are adjusted.

Each driver provides the implementation of power supply. However it
should not be the owner of power supply class instance because it is
exposed by core to other subsystems with power_supply_get_by_name().
These other subsystems have no knowledge when the driver will unregister
the power supply. This leads to several issues when driver is unbound -
mostly because user of power supply accesses freed memory.

Instead let the core own the instance of struct 'power_supply'.  Other
users of this power supply will still access valid memory because it
will be freed when device reference count reaches 0. Currently this
means "it will leak" but power_supply_put() call in next patches will
solve it.

This solves invalid memory references in following race condition
scenario:

Thread 1: charger manager
Thread 2: power supply driver, used by charger manager

THREAD 1 (charger manager)         THREAD 2 (power supply driver)
==========================         ==============================
psy = power_supply_get_by_name()
                                   Driver unbind, .remove
                                     power_supply_unregister()
                                     Device fully removed
psy->get_property()

The 'get_property' call is executed in invalid context because the driver was
unbound and struct 'power_supply' memory was freed.

This could be observed easily with charger manager driver (here compiled
with max17040 fuel gauge):

$ cat /sys/devices/virtual/power_supply/cm-battery/capacity &
$ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind
[   55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[   55.732584] pgd = d98d4000
[   55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000
[   55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM
[   55.746210] Modules linked in:
[   55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G        W       3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496
[   55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[   55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000
[   55.771647] PC is at 0x0
[   55.774182] LR is at charger_get_property+0x2f4/0x36c
[   55.779201] pc : [<00000000>]    lr : [<c034b0b4>]    psr: 60000013
[   55.779201] sp : daf55e90  ip : 00000003  fp : 00000000
[   55.790657] r10: 00000000  r9 : c06e2878  r8 : d9b26c68
[   55.795865] r7 : dad81610  r6 : daec7410  r5 : daf55ebc  r4 : 00000000
[   55.802367] r3 : 00000000  r2 : daf55ebc  r1 : 0000002a  r0 : d9b26c68
[   55.808879] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[   55.815994] Control: 10c5387d  Table: 598d406a  DAC: 00000015
[   55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210)
[   55.827451] Stack: (0xdaf55e90 to 0xdaf56000)
[   55.831795] 5e80:                                     60000013 c01459c4 0000002a c06f8ef8
[   55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4
[   55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80
[   55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001
[   55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000
[   55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000
[   55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124
[   55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550
[   55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364
[   55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c
[   55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000
[   55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000
[   55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c)
[   55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48)
[   55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104)
[   55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28)
[   55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484)
[   55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c)
[   55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100)
[   55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c)
[   55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48)
[   56.000626] Code: bad PC value
[   56.011652] ---[ end trace 7b64343fbdae8ef1 ]---

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

[for the nvec part]
Reviewed-by: Marc Dietrich <marvin24@gmx.de>

[for compal-laptop.c]
Acked-by: Darren Hart <dvhart@linux.intel.com>

[for the mfd part]
Acked-by: Lee Jones <lee.jones@linaro.org>

[for the hid part]
Acked-by: Jiri Kosina <jkosina@suse.cz>

[for the acpi part]
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-13 23:15:51 +01:00

695 lines
17 KiB
C

/*
* DA9150 Charger Driver
*
* Copyright (c) 2014 Dialog Semiconductor
*
* Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.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/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/interrupt.h>
#include <linux/power_supply.h>
#include <linux/notifier.h>
#include <linux/usb/phy.h>
#include <linux/iio/consumer.h>
#include <linux/mfd/da9150/core.h>
#include <linux/mfd/da9150/registers.h>
/* Private data */
struct da9150_charger {
struct da9150 *da9150;
struct device *dev;
struct power_supply *usb;
struct power_supply *battery;
struct power_supply *supply_online;
struct usb_phy *usb_phy;
struct notifier_block otg_nb;
struct work_struct otg_work;
unsigned long usb_event;
struct iio_channel *ibus_chan;
struct iio_channel *vbus_chan;
struct iio_channel *tjunc_chan;
struct iio_channel *vbat_chan;
};
static inline int da9150_charger_supply_online(struct da9150_charger *charger,
struct power_supply *psy,
union power_supply_propval *val)
{
val->intval = (psy == charger->supply_online) ? 1 : 0;
return 0;
}
/* Charger Properties */
static int da9150_charger_vbus_voltage_now(struct da9150_charger *charger,
union power_supply_propval *val)
{
int v_val, ret;
/* Read processed value - mV units */
ret = iio_read_channel_processed(charger->vbus_chan, &v_val);
if (ret < 0)
return ret;
/* Convert voltage to expected uV units */
val->intval = v_val * 1000;
return 0;
}
static int da9150_charger_ibus_current_avg(struct da9150_charger *charger,
union power_supply_propval *val)
{
int i_val, ret;
/* Read processed value - mA units */
ret = iio_read_channel_processed(charger->ibus_chan, &i_val);
if (ret < 0)
return ret;
/* Convert current to expected uA units */
val->intval = i_val * 1000;
return 0;
}
static int da9150_charger_tjunc_temp(struct da9150_charger *charger,
union power_supply_propval *val)
{
int t_val, ret;
/* Read processed value - 0.001 degrees C units */
ret = iio_read_channel_processed(charger->tjunc_chan, &t_val);
if (ret < 0)
return ret;
/* Convert temp to expect 0.1 degrees C units */
val->intval = t_val / 100;
return 0;
}
static enum power_supply_property da9150_charger_props[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_TEMP,
};
static int da9150_charger_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
ret = da9150_charger_supply_online(charger, psy, val);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = da9150_charger_vbus_voltage_now(charger, val);
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
ret = da9150_charger_ibus_current_avg(charger, val);
break;
case POWER_SUPPLY_PROP_TEMP:
ret = da9150_charger_tjunc_temp(charger, val);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
/* Battery Properties */
static int da9150_charger_battery_status(struct da9150_charger *charger,
union power_supply_propval *val)
{
u8 reg;
/* Check to see if battery is discharging */
reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
if (((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_OFF) ||
((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_WAIT)) {
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
return 0;
}
reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
/* Now check for other states */
switch (reg & DA9150_CHG_STAT_MASK) {
case DA9150_CHG_STAT_ACT:
case DA9150_CHG_STAT_PRE:
case DA9150_CHG_STAT_CC:
case DA9150_CHG_STAT_CV:
val->intval = POWER_SUPPLY_STATUS_CHARGING;
break;
case DA9150_CHG_STAT_OFF:
case DA9150_CHG_STAT_SUSP:
case DA9150_CHG_STAT_TEMP:
case DA9150_CHG_STAT_TIME:
case DA9150_CHG_STAT_BAT:
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case DA9150_CHG_STAT_FULL:
val->intval = POWER_SUPPLY_STATUS_FULL;
break;
default:
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
break;
}
return 0;
}
static int da9150_charger_battery_health(struct da9150_charger *charger,
union power_supply_propval *val)
{
u8 reg;
reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
/* Check if temperature limit reached */
switch (reg & DA9150_CHG_TEMP_MASK) {
case DA9150_CHG_TEMP_UNDER:
val->intval = POWER_SUPPLY_HEALTH_COLD;
return 0;
case DA9150_CHG_TEMP_OVER:
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
return 0;
default:
break;
}
/* Check for other health states */
switch (reg & DA9150_CHG_STAT_MASK) {
case DA9150_CHG_STAT_ACT:
case DA9150_CHG_STAT_PRE:
val->intval = POWER_SUPPLY_HEALTH_DEAD;
break;
case DA9150_CHG_STAT_TIME:
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
break;
default:
val->intval = POWER_SUPPLY_HEALTH_GOOD;
break;
}
return 0;
}
static int da9150_charger_battery_present(struct da9150_charger *charger,
union power_supply_propval *val)
{
u8 reg;
/* Check if battery present or removed */
reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
if ((reg & DA9150_CHG_STAT_MASK) == DA9150_CHG_STAT_BAT)
val->intval = 0;
else
val->intval = 1;
return 0;
}
static int da9150_charger_battery_charge_type(struct da9150_charger *charger,
union power_supply_propval *val)
{
u8 reg;
reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
switch (reg & DA9150_CHG_STAT_MASK) {
case DA9150_CHG_STAT_CC:
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
case DA9150_CHG_STAT_ACT:
case DA9150_CHG_STAT_PRE:
case DA9150_CHG_STAT_CV:
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
default:
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
}
return 0;
}
static int da9150_charger_battery_voltage_min(struct da9150_charger *charger,
union power_supply_propval *val)
{
u8 reg;
reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_C);
/* Value starts at 2500 mV, 50 mV increments, presented in uV */
val->intval = ((reg & DA9150_CHG_VFAULT_MASK) * 50000) + 2500000;
return 0;
}
static int da9150_charger_battery_voltage_now(struct da9150_charger *charger,
union power_supply_propval *val)
{
int v_val, ret;
/* Read processed value - mV units */
ret = iio_read_channel_processed(charger->vbat_chan, &v_val);
if (ret < 0)
return ret;
val->intval = v_val * 1000;
return 0;
}
static int da9150_charger_battery_current_max(struct da9150_charger *charger,
union power_supply_propval *val)
{
int reg;
reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_D);
/* 25mA increments */
val->intval = reg * 25000;
return 0;
}
static int da9150_charger_battery_voltage_max(struct da9150_charger *charger,
union power_supply_propval *val)
{
u8 reg;
reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_B);
/* Value starts at 3650 mV, 25 mV increments, presented in uV */
val->intval = ((reg & DA9150_CHG_VBAT_MASK) * 25000) + 3650000;
return 0;
}
static enum power_supply_property da9150_charger_bat_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
};
static int da9150_charger_battery_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
ret = da9150_charger_battery_status(charger, val);
break;
case POWER_SUPPLY_PROP_ONLINE:
ret = da9150_charger_supply_online(charger, psy, val);
break;
case POWER_SUPPLY_PROP_HEALTH:
ret = da9150_charger_battery_health(charger, val);
break;
case POWER_SUPPLY_PROP_PRESENT:
ret = da9150_charger_battery_present(charger, val);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
ret = da9150_charger_battery_charge_type(charger, val);
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
ret = da9150_charger_battery_voltage_min(charger, val);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = da9150_charger_battery_voltage_now(charger, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
ret = da9150_charger_battery_current_max(charger, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
ret = da9150_charger_battery_voltage_max(charger, val);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static irqreturn_t da9150_charger_chg_irq(int irq, void *data)
{
struct da9150_charger *charger = data;
power_supply_changed(charger->battery);
return IRQ_HANDLED;
}
static irqreturn_t da9150_charger_tjunc_irq(int irq, void *data)
{
struct da9150_charger *charger = data;
/* Nothing we can really do except report this. */
dev_crit(charger->dev, "TJunc over temperature!!!\n");
power_supply_changed(charger->usb);
return IRQ_HANDLED;
}
static irqreturn_t da9150_charger_vfault_irq(int irq, void *data)
{
struct da9150_charger *charger = data;
/* Nothing we can really do except report this. */
dev_crit(charger->dev, "VSYS under voltage!!!\n");
power_supply_changed(charger->usb);
power_supply_changed(charger->battery);
return IRQ_HANDLED;
}
static irqreturn_t da9150_charger_vbus_irq(int irq, void *data)
{
struct da9150_charger *charger = data;
u8 reg;
reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
/* Charger plugged in or battery only */
switch (reg & DA9150_VBUS_STAT_MASK) {
case DA9150_VBUS_STAT_OFF:
case DA9150_VBUS_STAT_WAIT:
charger->supply_online = charger->battery;
break;
case DA9150_VBUS_STAT_CHG:
charger->supply_online = charger->usb;
break;
default:
dev_warn(charger->dev, "Unknown VBUS state - reg = 0x%x\n",
reg);
charger->supply_online = NULL;
break;
}
power_supply_changed(charger->usb);
power_supply_changed(charger->battery);
return IRQ_HANDLED;
}
static void da9150_charger_otg_work(struct work_struct *data)
{
struct da9150_charger *charger =
container_of(data, struct da9150_charger, otg_work);
switch (charger->usb_event) {
case USB_EVENT_ID:
/* Enable OTG Boost */
da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_OTG);
break;
case USB_EVENT_NONE:
/* Revert to charge mode */
power_supply_changed(charger->usb);
power_supply_changed(charger->battery);
da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_CHG);
break;
}
}
static int da9150_charger_otg_ncb(struct notifier_block *nb, unsigned long val,
void *priv)
{
struct da9150_charger *charger =
container_of(nb, struct da9150_charger, otg_nb);
dev_dbg(charger->dev, "DA9150 OTG notify %lu\n", val);
charger->usb_event = val;
schedule_work(&charger->otg_work);
return NOTIFY_OK;
}
static int da9150_charger_register_irq(struct platform_device *pdev,
irq_handler_t handler,
const char *irq_name)
{
struct device *dev = &pdev->dev;
struct da9150_charger *charger = platform_get_drvdata(pdev);
int irq, ret;
irq = platform_get_irq_byname(pdev, irq_name);
if (irq < 0) {
dev_err(dev, "Failed to get IRQ CHG_STATUS: %d\n", irq);
return irq;
}
ret = request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, irq_name,
charger);
if (ret)
dev_err(dev, "Failed to request IRQ %d: %d\n", irq, ret);
return ret;
}
static void da9150_charger_unregister_irq(struct platform_device *pdev,
const char *irq_name)
{
struct device *dev = &pdev->dev;
struct da9150_charger *charger = platform_get_drvdata(pdev);
int irq;
irq = platform_get_irq_byname(pdev, irq_name);
if (irq < 0) {
dev_err(dev, "Failed to get IRQ CHG_STATUS: %d\n", irq);
return;
}
free_irq(irq, charger);
}
static const struct power_supply_desc usb_desc = {
.name = "da9150-usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = da9150_charger_props,
.num_properties = ARRAY_SIZE(da9150_charger_props),
.get_property = da9150_charger_get_prop,
};
static const struct power_supply_desc battery_desc = {
.name = "da9150-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = da9150_charger_bat_props,
.num_properties = ARRAY_SIZE(da9150_charger_bat_props),
.get_property = da9150_charger_battery_get_prop,
};
static int da9150_charger_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct da9150 *da9150 = dev_get_drvdata(dev->parent);
struct da9150_charger *charger;
u8 reg;
int ret;
charger = devm_kzalloc(dev, sizeof(struct da9150_charger), GFP_KERNEL);
if (!charger)
return -ENOMEM;
platform_set_drvdata(pdev, charger);
charger->da9150 = da9150;
charger->dev = dev;
/* Acquire ADC channels */
charger->ibus_chan = iio_channel_get(dev, "CHAN_IBUS");
if (IS_ERR(charger->ibus_chan)) {
ret = PTR_ERR(charger->ibus_chan);
goto ibus_chan_fail;
}
charger->vbus_chan = iio_channel_get(dev, "CHAN_VBUS");
if (IS_ERR(charger->vbus_chan)) {
ret = PTR_ERR(charger->vbus_chan);
goto vbus_chan_fail;
}
charger->tjunc_chan = iio_channel_get(dev, "CHAN_TJUNC");
if (IS_ERR(charger->tjunc_chan)) {
ret = PTR_ERR(charger->tjunc_chan);
goto tjunc_chan_fail;
}
charger->vbat_chan = iio_channel_get(dev, "CHAN_VBAT");
if (IS_ERR(charger->vbat_chan)) {
ret = PTR_ERR(charger->vbat_chan);
goto vbat_chan_fail;
}
/* Register power supplies */
charger->usb = power_supply_register(dev, &usb_desc, NULL);
if (IS_ERR(charger->usb)) {
ret = PTR_ERR(charger->usb);
goto usb_fail;
}
charger->battery = power_supply_register(dev, &battery_desc, NULL);
if (IS_ERR(charger->battery)) {
ret = PTR_ERR(charger->battery);
goto battery_fail;
}
/* Get initial online supply */
reg = da9150_reg_read(da9150, DA9150_STATUS_H);
switch (reg & DA9150_VBUS_STAT_MASK) {
case DA9150_VBUS_STAT_OFF:
case DA9150_VBUS_STAT_WAIT:
charger->supply_online = charger->battery;
break;
case DA9150_VBUS_STAT_CHG:
charger->supply_online = charger->usb;
break;
default:
dev_warn(dev, "Unknown VBUS state - reg = 0x%x\n", reg);
charger->supply_online = NULL;
break;
}
/* Setup OTG reporting & configuration */
charger->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
if (!IS_ERR_OR_NULL(charger->usb_phy)) {
INIT_WORK(&charger->otg_work, da9150_charger_otg_work);
charger->otg_nb.notifier_call = da9150_charger_otg_ncb;
usb_register_notifier(charger->usb_phy, &charger->otg_nb);
}
/* Register IRQs */
ret = da9150_charger_register_irq(pdev, da9150_charger_chg_irq,
"CHG_STATUS");
if (ret < 0)
goto chg_irq_fail;
ret = da9150_charger_register_irq(pdev, da9150_charger_tjunc_irq,
"CHG_TJUNC");
if (ret < 0)
goto tjunc_irq_fail;
ret = da9150_charger_register_irq(pdev, da9150_charger_vfault_irq,
"CHG_VFAULT");
if (ret < 0)
goto vfault_irq_fail;
ret = da9150_charger_register_irq(pdev, da9150_charger_vbus_irq,
"CHG_VBUS");
if (ret < 0)
goto vbus_irq_fail;
return 0;
vbus_irq_fail:
da9150_charger_unregister_irq(pdev, "CHG_VFAULT");
vfault_irq_fail:
da9150_charger_unregister_irq(pdev, "CHG_TJUNC");
tjunc_irq_fail:
da9150_charger_unregister_irq(pdev, "CHG_STATUS");
chg_irq_fail:
if (!IS_ERR_OR_NULL(charger->usb_phy))
usb_unregister_notifier(charger->usb_phy, &charger->otg_nb);
battery_fail:
power_supply_unregister(charger->usb);
usb_fail:
iio_channel_release(charger->vbat_chan);
vbat_chan_fail:
iio_channel_release(charger->tjunc_chan);
tjunc_chan_fail:
iio_channel_release(charger->vbus_chan);
vbus_chan_fail:
iio_channel_release(charger->ibus_chan);
ibus_chan_fail:
return ret;
}
static int da9150_charger_remove(struct platform_device *pdev)
{
struct da9150_charger *charger = platform_get_drvdata(pdev);
int irq;
/* Make sure IRQs are released before unregistering power supplies */
irq = platform_get_irq_byname(pdev, "CHG_VBUS");
free_irq(irq, charger);
irq = platform_get_irq_byname(pdev, "CHG_VFAULT");
free_irq(irq, charger);
irq = platform_get_irq_byname(pdev, "CHG_TJUNC");
free_irq(irq, charger);
irq = platform_get_irq_byname(pdev, "CHG_STATUS");
free_irq(irq, charger);
if (!IS_ERR_OR_NULL(charger->usb_phy))
usb_unregister_notifier(charger->usb_phy, &charger->otg_nb);
power_supply_unregister(charger->battery);
power_supply_unregister(charger->usb);
/* Release ADC channels */
iio_channel_release(charger->ibus_chan);
iio_channel_release(charger->vbus_chan);
iio_channel_release(charger->tjunc_chan);
iio_channel_release(charger->vbat_chan);
return 0;
}
static struct platform_driver da9150_charger_driver = {
.driver = {
.name = "da9150-charger",
},
.probe = da9150_charger_probe,
.remove = da9150_charger_remove,
};
module_platform_driver(da9150_charger_driver);
MODULE_DESCRIPTION("Charger Driver for DA9150");
MODULE_AUTHOR("Adam Thomson <Adam.Thomson.Opensource@diasemi.com>");
MODULE_LICENSE("GPL");