Commit 0c9888e3 authored by Tony Lindgren's avatar Tony Lindgren Committed by Sebastian Reichel
Browse files

power: supply: cpcap-charger: Add minimal CPCAP PMIC battery charger 



The custom CPCAP PMIC used on Motorola phones such as Droid 4 has a
USB battery charger. It can optionally also have a companion chip that
is used for wireless charging.

The charger on CPCAP also can feed VBUS for the USB host mode. This
can be handled by the existing kernel phy_companion interface.

Cc: devicetree@vger.kernel.org
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Michael Scott <michael.scott@linaro.org>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarSebastian Reichel <sre@kernel.org>
parent da26580f

Documentation/devicetree/bindings/power/supply/cpcap-charger.txt

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Motorola CPCAP PMIC battery charger binding



Required properties:

- compatible: Shall be "motorola,mapphone-cpcap-charger"

- interrupts: Interrupt specifier for each name in interrupt-names

- interrupt-names: Should contain the following entries:

		   "chrg_det", "rvrs_chrg", "chrg_se1b", "se0conn",

		   "rvrs_mode", "chrgcurr1", "vbusvld", "battdetb"

- io-channels: IIO ADC channel specifier for each name in io-channel-names

- io-channel-names: Should contain the following entries:

		    "battdetb", "battp", "vbus", "chg_isense", "batti"



Optional properties:

- mode-gpios: Optionally CPCAP charger can have a companion wireless

	      charge controller that is controlled with two GPIOs

	      that are active low.



Example:



cpcap_charger: charger {

	compatible = "motorola,mapphone-cpcap-charger";

	interrupts-extended = <

		&cpcap 13 0 &cpcap 12 0 &cpcap 29 0 &cpcap 28 0

		&cpcap 22 0 &cpcap 20 0 &cpcap 19 0 &cpcap 54 0

	>;

	interrupt-names =

		"chrg_det", "rvrs_chrg", "chrg_se1b", "se0conn",

		"rvrs_mode", "chrgcurr1", "vbusvld", "battdetb";

	mode-gpios = <&gpio3 29 GPIO_ACTIVE_LOW

		      &gpio3 23 GPIO_ACTIVE_LOW>;

	io-channels = <&cpcap_adc 0 &cpcap_adc 1

		       &cpcap_adc 2 &cpcap_adc 5

		       &cpcap_adc 6>;

	io-channel-names = "battdetb", "battp",

			   "vbus", "chg_isense",

			   "batti";

};

drivers/power/supply/Kconfig

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@@ -317,6 +317,14 @@ config BATTERY_RX51 
	  Say Y here to enable support for battery information on Nokia

	  RX-51, also known as N900 tablet.



config CHARGER_CPCAP

	tristate "CPCAP PMIC Charger Driver"

	depends on MFD_CPCAP && IIO

	default MFD_CPCAP

	help

	  Say Y to enable support for CPCAP PMIC charger driver for Motorola

	  mobile devices such as Droid 4.



config CHARGER_ISP1704

	tristate "ISP1704 USB Charger Detection"

	depends on USB_PHY

drivers/power/supply/Makefile

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@@ -51,6 +51,7 @@ obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o 
obj-$(CONFIG_BATTERY_JZ4740)	+= jz4740-battery.o

obj-$(CONFIG_BATTERY_RX51)	+= rx51_battery.o

obj-$(CONFIG_AB8500_BM)		+= ab8500_bmdata.o ab8500_charger.o ab8500_fg.o ab8500_btemp.o abx500_chargalg.o pm2301_charger.o

obj-$(CONFIG_CHARGER_CPCAP)	+= cpcap-charger.o

obj-$(CONFIG_CHARGER_ISP1704)	+= isp1704_charger.o

obj-$(CONFIG_CHARGER_MAX8903)	+= max8903_charger.o

obj-$(CONFIG_CHARGER_TWL4030)	+= twl4030_charger.o

drivers/power/supply/cpcap-charger.c

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/*

 * 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 */

#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)

#define CPCAP_REG_CRM_RVRSMODE		BIT(12)

#define CPCAP_REG_CRM_ICHRG_TR1		BIT(11)

#define CPCAP_REG_CRM_ICHRG_TR0		BIT(10)

#define CPCAP_REG_CRM_FET_OVRD		BIT(9)

#define CPCAP_REG_CRM_FET_CTRL		BIT(8)

#define CPCAP_REG_CRM_VCHRG3		BIT(7)

#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)

#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 */

#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_4V15	CPCAP_REG_CRM_VCHRG(0x2)

#define CPCAP_REG_CRM_VCHRG_4V20	CPCAP_REG_CRM_VCHRG(0x3)

#define CPCAP_REG_CRM_VCHRG_4V22	CPCAP_REG_CRM_VCHRG(0x4)

#define CPCAP_REG_CRM_VCHRG_4V24	CPCAP_REG_CRM_VCHRG(0x5)

#define CPCAP_REG_CRM_VCHRG_4V26	CPCAP_REG_CRM_VCHRG(0x6)

#define CPCAP_REG_CRM_VCHRG_4V28	CPCAP_REG_CRM_VCHRG(0x7)

#define CPCAP_REG_CRM_VCHRG_4V30	CPCAP_REG_CRM_VCHRG(0x8)

#define CPCAP_REG_CRM_VCHRG_4V32	CPCAP_REG_CRM_VCHRG(0x9)

#define CPCAP_REG_CRM_VCHRG_4V34	CPCAP_REG_CRM_VCHRG(0xa)

#define CPCAP_REG_CRM_VCHRG_4V36	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 */

#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_0A176	CPCAP_REG_CRM_ICHRG(0x2)

#define CPCAP_REG_CRM_ICHRG_0A264	CPCAP_REG_CRM_ICHRG(0x3)

#define CPCAP_REG_CRM_ICHRG_0A352	CPCAP_REG_CRM_ICHRG(0x4)

#define CPCAP_REG_CRM_ICHRG_0A440	CPCAP_REG_CRM_ICHRG(0x5)

#define CPCAP_REG_CRM_ICHRG_0A528	CPCAP_REG_CRM_ICHRG(0x6)

#define CPCAP_REG_CRM_ICHRG_0A616	CPCAP_REG_CRM_ICHRG(0x7)

#define CPCAP_REG_CRM_ICHRG_0A704	CPCAP_REG_CRM_ICHRG(0x8)

#define CPCAP_REG_CRM_ICHRG_0A792	CPCAP_REG_CRM_ICHRG(0x9)

#define CPCAP_REG_CRM_ICHRG_0A880	CPCAP_REG_CRM_ICHRG(0xa)

#define CPCAP_REG_CRM_ICHRG_0A968	CPCAP_REG_CRM_ICHRG(0xb)

#define CPCAP_REG_CRM_ICHRG_1A056	CPCAP_REG_CRM_ICHRG(0xc)

#define CPCAP_REG_CRM_ICHRG_1A144	CPCAP_REG_CRM_ICHRG(0xd)

#define CPCAP_REG_CRM_ICHRG_1A584	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 = max_voltage && (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_1A584;

		else

			max_current = CPCAP_REG_CRM_ICHRG_0A528;



		error = cpcap_charger_set_state(ddata,

						CPCAP_REG_CRM_VCHRG_4V20,

						max_current,

						CPCAP_REG_CRM_TR_0A72);

		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)

		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		= "cpcap_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;

	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);



	ddata->usb = devm_power_supply_register(ddata->dev,

						&cpcap_charger_usb_desc,

						NULL);

	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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