diff options
author | Tony Lindgren <tony@atomide.com> | 2017-03-26 20:25:13 -0700 |
---|---|---|
committer | Sebastian Reichel <sre@kernel.org> | 2017-04-14 01:41:34 +0200 |
commit | 0c9888e3c1925ef4b18a04f71fa3a8228a648a08 (patch) | |
tree | 20b21fc75fce87aab809b1098b28afabf1211125 | |
parent | da26580f4eb81f3614cf5e3af43155fb45d118fc (diff) |
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: Tony Lindgren <tony@atomide.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
-rw-r--r-- | Documentation/devicetree/bindings/power/supply/cpcap-charger.txt | 37 | ||||
-rw-r--r-- | drivers/power/supply/Kconfig | 8 | ||||
-rw-r--r-- | drivers/power/supply/Makefile | 1 | ||||
-rw-r--r-- | drivers/power/supply/cpcap-charger.c | 681 |
4 files changed, 727 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/power/supply/cpcap-charger.txt b/Documentation/devicetree/bindings/power/supply/cpcap-charger.txt new file mode 100644 index 000000000000..80bd873c3b1d --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/cpcap-charger.txt @@ -0,0 +1,37 @@ +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"; +}; diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index cc50e15e72cc..2ac3dd41f15b 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -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 diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index 3789a2c06fdf..957e099a05cd 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -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 diff --git a/drivers/power/supply/cpcap-charger.c b/drivers/power/supply/cpcap-charger.c new file mode 100644 index 000000000000..543a1bd21ab9 --- /dev/null +++ b/drivers/power/supply/cpcap-charger.c @@ -0,0 +1,681 @@ +/* + * 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"); |