700 lines
18 KiB
C
700 lines
18 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#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;
|
|
}
|
|
|
|
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:
|
|
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");
|