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alistair23-linux/drivers/power/supply/cpcap-charger.c
Thomas Gleixner 1802d0beec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 
Based on 1 normalized pattern(s):

  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 this program is
  distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 655 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:41 -07:00

694 lines
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Raw Blame History

// SPDX-License-Identifier: GPL-2.0-only
/*
* Motorola CPCAP PMIC battery charger driver
*
* Copyright (C) 2017 Tony Lindgren <tony@atomide.com>
*
* Rewritten for Linux power framework with some parts based on
* on earlier driver found in the Motorola Linux kernel:
*
* Copyright (C) 2009-2010 Motorola, Inc.
*/
#include <linux/atomic.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/gpio/consumer.h>
#include <linux/usb/phy_companion.h>
#include <linux/phy/omap_usb.h>
#include <linux/usb/otg.h>
#include <linux/iio/consumer.h>
#include <linux/mfd/motorola-cpcap.h>
/*
* CPCAP_REG_CRM register bits. For documentation of somewhat similar hardware,
* see NXP "MC13783 Power Management and Audio Circuit Users's Guide"
* MC13783UG.pdf chapter "8.5 Battery Interface Register Summary". The registers
* and values for CPCAP are different, but some of the internal components seem
* similar. Also see the Motorola Linux kernel cpcap-regbits.h. CPCAP_REG_CHRGR_1
* bits that seem to describe the CRM register.
*/
#define CPCAP_REG_CRM_UNUSED_641_15 BIT(15) /* 641 = register number */
#define CPCAP_REG_CRM_UNUSED_641_14 BIT(14) /* 641 = register number */
#define CPCAP_REG_CRM_CHRG_LED_EN BIT(13) /* Charger LED */
#define CPCAP_REG_CRM_RVRSMODE BIT(12) /* USB VBUS output enable */
#define CPCAP_REG_CRM_ICHRG_TR1 BIT(11) /* Trickle charge current */
#define CPCAP_REG_CRM_ICHRG_TR0 BIT(10)
#define CPCAP_REG_CRM_FET_OVRD BIT(9) /* 0 = hardware, 1 = FET_CTRL */
#define CPCAP_REG_CRM_FET_CTRL BIT(8) /* BPFET 1 if FET_OVRD set */
#define CPCAP_REG_CRM_VCHRG3 BIT(7) /* Charge voltage bits */
#define CPCAP_REG_CRM_VCHRG2 BIT(6)
#define CPCAP_REG_CRM_VCHRG1 BIT(5)
#define CPCAP_REG_CRM_VCHRG0 BIT(4)
#define CPCAP_REG_CRM_ICHRG3 BIT(3) /* Charge current bits */
#define CPCAP_REG_CRM_ICHRG2 BIT(2)
#define CPCAP_REG_CRM_ICHRG1 BIT(1)
#define CPCAP_REG_CRM_ICHRG0 BIT(0)
/* CPCAP_REG_CRM trickle charge voltages */
#define CPCAP_REG_CRM_TR(val) (((val) & 0x3) << 10)
#define CPCAP_REG_CRM_TR_0A00 CPCAP_REG_CRM_TR(0x0)
#define CPCAP_REG_CRM_TR_0A24 CPCAP_REG_CRM_TR(0x1)
#define CPCAP_REG_CRM_TR_0A48 CPCAP_REG_CRM_TR(0x2)
#define CPCAP_REG_CRM_TR_0A72 CPCAP_REG_CRM_TR(0x4)
/*
* CPCAP_REG_CRM charge voltages based on the ADC channel 1 values.
* Note that these register bits don't match MC13783UG.pdf VCHRG
* register bits.
*/
#define CPCAP_REG_CRM_VCHRG(val) (((val) & 0xf) << 4)
#define CPCAP_REG_CRM_VCHRG_3V80 CPCAP_REG_CRM_VCHRG(0x0)
#define CPCAP_REG_CRM_VCHRG_4V10 CPCAP_REG_CRM_VCHRG(0x1)
#define CPCAP_REG_CRM_VCHRG_4V12 CPCAP_REG_CRM_VCHRG(0x2)
#define CPCAP_REG_CRM_VCHRG_4V15 CPCAP_REG_CRM_VCHRG(0x3)
#define CPCAP_REG_CRM_VCHRG_4V17 CPCAP_REG_CRM_VCHRG(0x4)
#define CPCAP_REG_CRM_VCHRG_4V20 CPCAP_REG_CRM_VCHRG(0x5)
#define CPCAP_REG_CRM_VCHRG_4V23 CPCAP_REG_CRM_VCHRG(0x6)
#define CPCAP_REG_CRM_VCHRG_4V25 CPCAP_REG_CRM_VCHRG(0x7)
#define CPCAP_REG_CRM_VCHRG_4V27 CPCAP_REG_CRM_VCHRG(0x8)
#define CPCAP_REG_CRM_VCHRG_4V30 CPCAP_REG_CRM_VCHRG(0x9)
#define CPCAP_REG_CRM_VCHRG_4V33 CPCAP_REG_CRM_VCHRG(0xa)
#define CPCAP_REG_CRM_VCHRG_4V35 CPCAP_REG_CRM_VCHRG(0xb)
#define CPCAP_REG_CRM_VCHRG_4V38 CPCAP_REG_CRM_VCHRG(0xc)
#define CPCAP_REG_CRM_VCHRG_4V40 CPCAP_REG_CRM_VCHRG(0xd)
#define CPCAP_REG_CRM_VCHRG_4V42 CPCAP_REG_CRM_VCHRG(0xe)
#define CPCAP_REG_CRM_VCHRG_4V44 CPCAP_REG_CRM_VCHRG(0xf)
/*
* CPCAP_REG_CRM charge currents. These seem to match MC13783UG.pdf
* values in "Table 8-3. Charge Path Regulator Current Limit
* Characteristics" for the nominal values.
*/
#define CPCAP_REG_CRM_ICHRG(val) (((val) & 0xf) << 0)
#define CPCAP_REG_CRM_ICHRG_0A000 CPCAP_REG_CRM_ICHRG(0x0)
#define CPCAP_REG_CRM_ICHRG_0A070 CPCAP_REG_CRM_ICHRG(0x1)
#define CPCAP_REG_CRM_ICHRG_0A177 CPCAP_REG_CRM_ICHRG(0x2)
#define CPCAP_REG_CRM_ICHRG_0A266 CPCAP_REG_CRM_ICHRG(0x3)
#define CPCAP_REG_CRM_ICHRG_0A355 CPCAP_REG_CRM_ICHRG(0x4)
#define CPCAP_REG_CRM_ICHRG_0A443 CPCAP_REG_CRM_ICHRG(0x5)
#define CPCAP_REG_CRM_ICHRG_0A532 CPCAP_REG_CRM_ICHRG(0x6)
#define CPCAP_REG_CRM_ICHRG_0A621 CPCAP_REG_CRM_ICHRG(0x7)
#define CPCAP_REG_CRM_ICHRG_0A709 CPCAP_REG_CRM_ICHRG(0x8)
#define CPCAP_REG_CRM_ICHRG_0A798 CPCAP_REG_CRM_ICHRG(0x9)
#define CPCAP_REG_CRM_ICHRG_0A886 CPCAP_REG_CRM_ICHRG(0xa)
#define CPCAP_REG_CRM_ICHRG_0A975 CPCAP_REG_CRM_ICHRG(0xb)
#define CPCAP_REG_CRM_ICHRG_1A064 CPCAP_REG_CRM_ICHRG(0xc)
#define CPCAP_REG_CRM_ICHRG_1A152 CPCAP_REG_CRM_ICHRG(0xd)
#define CPCAP_REG_CRM_ICHRG_1A596 CPCAP_REG_CRM_ICHRG(0xe)
#define CPCAP_REG_CRM_ICHRG_NO_LIMIT CPCAP_REG_CRM_ICHRG(0xf)
enum {
CPCAP_CHARGER_IIO_BATTDET,
CPCAP_CHARGER_IIO_VOLTAGE,
CPCAP_CHARGER_IIO_VBUS,
CPCAP_CHARGER_IIO_CHRG_CURRENT,
CPCAP_CHARGER_IIO_BATT_CURRENT,
CPCAP_CHARGER_IIO_NR,
};
struct cpcap_charger_ddata {
struct device *dev;
struct regmap *reg;
struct list_head irq_list;
struct delayed_work detect_work;
struct delayed_work vbus_work;
struct gpio_desc *gpio[2]; /* gpio_reven0 & 1 */
struct iio_channel *channels[CPCAP_CHARGER_IIO_NR];
struct power_supply *usb;
struct phy_companion comparator; /* For USB VBUS */
bool vbus_enabled;
atomic_t active;
int status;
};
struct cpcap_interrupt_desc {
int irq;
struct list_head node;
const char *name;
};
struct cpcap_charger_ints_state {
bool chrg_det;
bool rvrs_chrg;
bool vbusov;
bool chrg_se1b;
bool rvrs_mode;
bool chrgcurr1;
bool vbusvld;
bool battdetb;
};
static enum power_supply_property cpcap_charger_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
static bool cpcap_charger_battery_found(struct cpcap_charger_ddata *ddata)
{
struct iio_channel *channel;
int error, value;
channel = ddata->channels[CPCAP_CHARGER_IIO_BATTDET];
error = iio_read_channel_raw(channel, &value);
if (error < 0) {
dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
return false;
}
return value == 1;
}
static int cpcap_charger_get_charge_voltage(struct cpcap_charger_ddata *ddata)
{
struct iio_channel *channel;
int error, value = 0;
channel = ddata->channels[CPCAP_CHARGER_IIO_VOLTAGE];
error = iio_read_channel_processed(channel, &value);
if (error < 0) {
dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
return 0;
}
return value;
}
static int cpcap_charger_get_charge_current(struct cpcap_charger_ddata *ddata)
{
struct iio_channel *channel;
int error, value = 0;
channel = ddata->channels[CPCAP_CHARGER_IIO_CHRG_CURRENT];
error = iio_read_channel_processed(channel, &value);
if (error < 0) {
dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
return 0;
}
return value;
}
static int cpcap_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct cpcap_charger_ddata *ddata = dev_get_drvdata(psy->dev.parent);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = ddata->status;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
if (ddata->status == POWER_SUPPLY_STATUS_CHARGING)
val->intval = cpcap_charger_get_charge_voltage(ddata) *
1000;
else
val->intval = 0;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
if (ddata->status == POWER_SUPPLY_STATUS_CHARGING)
val->intval = cpcap_charger_get_charge_current(ddata) *
1000;
else
val->intval = 0;
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = ddata->status == POWER_SUPPLY_STATUS_CHARGING;
break;
default:
return -EINVAL;
}
return 0;
}
static void cpcap_charger_set_cable_path(struct cpcap_charger_ddata *ddata,
bool enabled)
{
if (!ddata->gpio[0])
return;
gpiod_set_value(ddata->gpio[0], enabled);
}
static void cpcap_charger_set_inductive_path(struct cpcap_charger_ddata *ddata,
bool enabled)
{
if (!ddata->gpio[1])
return;
gpiod_set_value(ddata->gpio[1], enabled);
}
static int cpcap_charger_set_state(struct cpcap_charger_ddata *ddata,
int max_voltage, int charge_current,
int trickle_current)
{
bool enable;
int error;
enable = (charge_current || trickle_current);
dev_dbg(ddata->dev, "%s enable: %i\n", __func__, enable);
if (!enable) {
error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
0x3fff,
CPCAP_REG_CRM_FET_OVRD |
CPCAP_REG_CRM_FET_CTRL);
if (error) {
ddata->status = POWER_SUPPLY_STATUS_UNKNOWN;
goto out_err;
}
ddata->status = POWER_SUPPLY_STATUS_DISCHARGING;
return 0;
}
error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 0x3fff,
CPCAP_REG_CRM_CHRG_LED_EN |
trickle_current |
CPCAP_REG_CRM_FET_OVRD |
CPCAP_REG_CRM_FET_CTRL |
max_voltage |
charge_current);
if (error) {
ddata->status = POWER_SUPPLY_STATUS_UNKNOWN;
goto out_err;
}
ddata->status = POWER_SUPPLY_STATUS_CHARGING;
return 0;
out_err:
dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
return error;
}
static bool cpcap_charger_vbus_valid(struct cpcap_charger_ddata *ddata)
{
int error, value = 0;
struct iio_channel *channel =
ddata->channels[CPCAP_CHARGER_IIO_VBUS];
error = iio_read_channel_processed(channel, &value);
if (error >= 0)
return value > 3900 ? true : false;
dev_err(ddata->dev, "error reading VBUS: %i\n", error);
return false;
}
/* VBUS control functions for the USB PHY companion */
static void cpcap_charger_vbus_work(struct work_struct *work)
{
struct cpcap_charger_ddata *ddata;
bool vbus = false;
int error;
ddata = container_of(work, struct cpcap_charger_ddata,
vbus_work.work);
if (ddata->vbus_enabled) {
vbus = cpcap_charger_vbus_valid(ddata);
if (vbus) {
dev_info(ddata->dev, "VBUS already provided\n");
return;
}
cpcap_charger_set_cable_path(ddata, false);
cpcap_charger_set_inductive_path(ddata, false);
error = cpcap_charger_set_state(ddata, 0, 0, 0);
if (error)
goto out_err;
error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
CPCAP_REG_CRM_RVRSMODE,
CPCAP_REG_CRM_RVRSMODE);
if (error)
goto out_err;
} else {
error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
CPCAP_REG_CRM_RVRSMODE, 0);
if (error)
goto out_err;
cpcap_charger_set_cable_path(ddata, true);
cpcap_charger_set_inductive_path(ddata, true);
}
return;
out_err:
dev_err(ddata->dev, "%s could not %s vbus: %i\n", __func__,
ddata->vbus_enabled ? "enable" : "disable", error);
}
static int cpcap_charger_set_vbus(struct phy_companion *comparator,
bool enabled)
{
struct cpcap_charger_ddata *ddata =
container_of(comparator, struct cpcap_charger_ddata,
comparator);
ddata->vbus_enabled = enabled;
schedule_delayed_work(&ddata->vbus_work, 0);
return 0;
}
/* Charger interrupt handling functions */
static int cpcap_charger_get_ints_state(struct cpcap_charger_ddata *ddata,
struct cpcap_charger_ints_state *s)
{
int val, error;
error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val);
if (error)
return error;
s->chrg_det = val & BIT(13);
s->rvrs_chrg = val & BIT(12);
s->vbusov = val & BIT(11);
error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val);
if (error)
return error;
s->chrg_se1b = val & BIT(13);
s->rvrs_mode = val & BIT(6);
s->chrgcurr1 = val & BIT(4);
s->vbusvld = val & BIT(3);
error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val);
if (error)
return error;
s->battdetb = val & BIT(6);
return 0;
}
static void cpcap_usb_detect(struct work_struct *work)
{
struct cpcap_charger_ddata *ddata;
struct cpcap_charger_ints_state s;
int error;
ddata = container_of(work, struct cpcap_charger_ddata,
detect_work.work);
error = cpcap_charger_get_ints_state(ddata, &s);
if (error)
return;
if (cpcap_charger_vbus_valid(ddata) && s.chrgcurr1) {
int max_current;
if (cpcap_charger_battery_found(ddata))
max_current = CPCAP_REG_CRM_ICHRG_1A596;
else
max_current = CPCAP_REG_CRM_ICHRG_0A532;
error = cpcap_charger_set_state(ddata,
CPCAP_REG_CRM_VCHRG_4V35,
max_current, 0);
if (error)
goto out_err;
} else {
error = cpcap_charger_set_state(ddata, 0, 0, 0);
if (error)
goto out_err;
}
power_supply_changed(ddata->usb);
return;
out_err:
dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
}
static irqreturn_t cpcap_charger_irq_thread(int irq, void *data)
{
struct cpcap_charger_ddata *ddata = data;
if (!atomic_read(&ddata->active))
return IRQ_NONE;
schedule_delayed_work(&ddata->detect_work, 0);
return IRQ_HANDLED;
}
static int cpcap_usb_init_irq(struct platform_device *pdev,
struct cpcap_charger_ddata *ddata,
const char *name)
{
struct cpcap_interrupt_desc *d;
int irq, error;
irq = platform_get_irq_byname(pdev, name);
if (irq < 0)
return -ENODEV;
error = devm_request_threaded_irq(ddata->dev, irq, NULL,
cpcap_charger_irq_thread,
IRQF_SHARED,
name, ddata);
if (error) {
dev_err(ddata->dev, "could not get irq %s: %i\n",
name, error);
return error;
}
d = devm_kzalloc(ddata->dev, sizeof(*d), GFP_KERNEL);
if (!d)
return -ENOMEM;
d->name = name;
d->irq = irq;
list_add(&d->node, &ddata->irq_list);
return 0;
}
static const char * const cpcap_charger_irqs[] = {
/* REG_INT_0 */
"chrg_det", "rvrs_chrg",
/* REG_INT1 */
"chrg_se1b", "se0conn", "rvrs_mode", "chrgcurr1", "vbusvld",
/* REG_INT_3 */
"battdetb",
};
static int cpcap_usb_init_interrupts(struct platform_device *pdev,
struct cpcap_charger_ddata *ddata)
{
int i, error;
for (i = 0; i < ARRAY_SIZE(cpcap_charger_irqs); i++) {
error = cpcap_usb_init_irq(pdev, ddata, cpcap_charger_irqs[i]);
if (error)
return error;
}
return 0;
}
static void cpcap_charger_init_optional_gpios(struct cpcap_charger_ddata *ddata)
{
int i;
for (i = 0; i < 2; i++) {
ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode",
i, GPIOD_OUT_HIGH);
if (IS_ERR(ddata->gpio[i])) {
dev_info(ddata->dev, "no mode change GPIO%i: %li\n",
i, PTR_ERR(ddata->gpio[i]));
ddata->gpio[i] = NULL;
}
}
}
static int cpcap_charger_init_iio(struct cpcap_charger_ddata *ddata)
{
const char * const names[CPCAP_CHARGER_IIO_NR] = {
"battdetb", "battp", "vbus", "chg_isense", "batti",
};
int error, i;
for (i = 0; i < CPCAP_CHARGER_IIO_NR; i++) {
ddata->channels[i] = devm_iio_channel_get(ddata->dev,
names[i]);
if (IS_ERR(ddata->channels[i])) {
error = PTR_ERR(ddata->channels[i]);
goto out_err;
}
if (!ddata->channels[i]->indio_dev) {
error = -ENXIO;
goto out_err;
}
}
return 0;
out_err:
if (error != -EPROBE_DEFER)
dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
error);
return error;
}
static const struct power_supply_desc cpcap_charger_usb_desc = {
.name = "usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = cpcap_charger_props,
.num_properties = ARRAY_SIZE(cpcap_charger_props),
.get_property = cpcap_charger_get_property,
};
#ifdef CONFIG_OF
static const struct of_device_id cpcap_charger_id_table[] = {
{
.compatible = "motorola,mapphone-cpcap-charger",
},
{},
};
MODULE_DEVICE_TABLE(of, cpcap_charger_id_table);
#endif
static int cpcap_charger_probe(struct platform_device *pdev)
{
struct cpcap_charger_ddata *ddata;
const struct of_device_id *of_id;
struct power_supply_config psy_cfg = {};
int error;
of_id = of_match_device(of_match_ptr(cpcap_charger_id_table),
&pdev->dev);
if (!of_id)
return -EINVAL;
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
if (!ddata)
return -ENOMEM;
ddata->dev = &pdev->dev;
ddata->reg = dev_get_regmap(ddata->dev->parent, NULL);
if (!ddata->reg)
return -ENODEV;
INIT_LIST_HEAD(&ddata->irq_list);
INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect);
INIT_DELAYED_WORK(&ddata->vbus_work, cpcap_charger_vbus_work);
platform_set_drvdata(pdev, ddata);
error = cpcap_charger_init_iio(ddata);
if (error)
return error;
atomic_set(&ddata->active, 1);
psy_cfg.of_node = pdev->dev.of_node;
psy_cfg.drv_data = ddata;
ddata->usb = devm_power_supply_register(ddata->dev,
&cpcap_charger_usb_desc,
&psy_cfg);
if (IS_ERR(ddata->usb)) {
error = PTR_ERR(ddata->usb);
dev_err(ddata->dev, "failed to register USB charger: %i\n",
error);
return error;
}
error = cpcap_usb_init_interrupts(pdev, ddata);
if (error)
return error;
ddata->comparator.set_vbus = cpcap_charger_set_vbus;
error = omap_usb2_set_comparator(&ddata->comparator);
if (error == -ENODEV) {
dev_info(ddata->dev, "charger needs phy, deferring probe\n");
return -EPROBE_DEFER;
}
cpcap_charger_init_optional_gpios(ddata);
schedule_delayed_work(&ddata->detect_work, 0);
return 0;
}
static int cpcap_charger_remove(struct platform_device *pdev)
{
struct cpcap_charger_ddata *ddata = platform_get_drvdata(pdev);
int error;
atomic_set(&ddata->active, 0);
error = omap_usb2_set_comparator(NULL);
if (error)
dev_warn(ddata->dev, "could not clear USB comparator: %i\n",
error);
error = cpcap_charger_set_state(ddata, 0, 0, 0);
if (error)
dev_warn(ddata->dev, "could not clear charger: %i\n",
error);
cancel_delayed_work_sync(&ddata->vbus_work);
cancel_delayed_work_sync(&ddata->detect_work);
return 0;
}
static struct platform_driver cpcap_charger_driver = {
.probe = cpcap_charger_probe,
.driver = {
.name = "cpcap-charger",
.of_match_table = of_match_ptr(cpcap_charger_id_table),
},
.remove = cpcap_charger_remove,
};
module_platform_driver(cpcap_charger_driver);
MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
MODULE_DESCRIPTION("CPCAP Battery Charger Interface driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:cpcap-charger");
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