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@xxxxxxxxxxxxxxx
Cc: Marcel Partap <mpartap@xxxxxxx>
Cc: Michael Scott <michael.scott@xxxxxxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
Changes since v1:
- Fix scaling of IIO values as pointed out by Sebastian Reichel
<sre@xxxxxxxxxx>
- Use iio_read_channel_processed() instead of iio_read_channel_scaled()
as changed in the v2 of the ADC driver
- Add GPL v2 license header
---
.../bindings/power/supply/cpcap-charger.txt | 34 +
drivers/power/supply/Kconfig | 7 +
drivers/power/supply/Makefile | 1 +
drivers/power/supply/cpcap-charger.c | 684 +++++++++++++++++++++
4 files changed, 726 insertions(+)
create mode 100644 Documentation/devicetree/bindings/power/supply/cpcap-charger.txt
create mode 100644 drivers/power/supply/cpcap-charger.c
diff --git a/Documentation/devicetree/bindings/power/supply/cpcap-charger.txt b/Documentation/devicetree/bindings/power/supply/cpcap-charger.txt
new file mode 100644
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/cpcap-charger.txt
@@ -0,0 +1,34 @@
+Motorola CPCAP PMIC battery charger binding
+
+Required properties:
+- compatible: Shall be "motorola,cpcap-charger" or
+ "motorola,mapphone-cpcap-charger"
+- interrupts: Interrupts used on the CPCAP PMIC
+- interrupt-names: Names of the interrupts
+- io-channels: IIO ADC channels used by the charger
+- io-channel-names: Names of the IIO ADC channels
+
+Optional properties:
+- mode-gpios: Optionally CPCAP charger can have a companion wireless
+ charge controller that is controlled with two GPIOs
+
+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
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -317,6 +317,13 @@ 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
+ 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
--- 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
--- /dev/null
+++ b/drivers/power/supply/cpcap-charger.c
@@ -0,0 +1,684 @@
+/*
+ * Motorola CPCAP PMIC battery charger driver
+ *
+ * Copyright (C) 2017 Tony Lindgren <tony@xxxxxxxxxxx>
+ *
+ * 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,cpcap-charger",
+ },
+ {
+ .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@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("CPCAP Battery Charger Interface driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:cpcap-charger");
--
2.11.1
--
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