--- /dev/null
+/*
+ * Battery driver for Marvell 88PM860x PMIC
+ *
+ * Copyright (c) 2012 Marvell International Ltd.
+ * Author: Jett Zhou <jtzhou@marvell.com>
+ * Haojian Zhuang <haojian.zhuang@marvell.com>
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/power_supply.h>
+#include <linux/mfd/88pm860x.h>
+#include <linux/delay.h>
+#include <linux/uaccess.h>
+#include <asm/div64.h>
+
+/* bit definitions of Status Query Interface 2 */
+#define STATUS2_CHG (1 << 2)
+
+/* bit definitions of Reset Out Register */
+#define RESET_SW_PD (1 << 7)
+
+/* bit definitions of PreReg 1 */
+#define PREREG1_90MA (0x0)
+#define PREREG1_180MA (0x1)
+#define PREREG1_450MA (0x4)
+#define PREREG1_540MA (0x5)
+#define PREREG1_1350MA (0xE)
+#define PREREG1_VSYS_4_5V (3 << 4)
+
+/* bit definitions of Charger Control 1 Register */
+#define CC1_MODE_OFF (0)
+#define CC1_MODE_PRECHARGE (1)
+#define CC1_MODE_FASTCHARGE (2)
+#define CC1_MODE_PULSECHARGE (3)
+#define CC1_ITERM_20MA (0 << 2)
+#define CC1_ITERM_60MA (2 << 2)
+#define CC1_VFCHG_4_2V (9 << 4)
+
+/* bit definitions of Charger Control 2 Register */
+#define CC2_ICHG_100MA (0x1)
+#define CC2_ICHG_500MA (0x9)
+#define CC2_ICHG_1000MA (0x13)
+
+/* bit definitions of Charger Control 3 Register */
+#define CC3_180MIN_TIMEOUT (0x6 << 4)
+#define CC3_270MIN_TIMEOUT (0x7 << 4)
+#define CC3_360MIN_TIMEOUT (0xA << 4)
+#define CC3_DISABLE_TIMEOUT (0xF << 4)
+
+/* bit definitions of Charger Control 4 Register */
+#define CC4_IPRE_40MA (7)
+#define CC4_VPCHG_3_2V (3 << 4)
+#define CC4_IFCHG_MON_EN (1 << 6)
+#define CC4_BTEMP_MON_EN (1 << 7)
+
+/* bit definitions of Charger Control 6 Register */
+#define CC6_BAT_OV_EN (1 << 2)
+#define CC6_BAT_UV_EN (1 << 3)
+#define CC6_UV_VBAT_SET (0x3 << 6) /* 2.8v */
+
+/* bit definitions of Charger Control 7 Register */
+#define CC7_BAT_REM_EN (1 << 3)
+#define CC7_IFSM_EN (1 << 7)
+
+/* bit definitions of Measurement Enable 1 Register */
+#define MEAS1_VBAT (1 << 0)
+
+/* bit definitions of Measurement Enable 3 Register */
+#define MEAS3_IBAT_EN (1 << 0)
+#define MEAS3_CC_EN (1 << 2)
+
+#define FSM_INIT 0
+#define FSM_DISCHARGE 1
+#define FSM_PRECHARGE 2
+#define FSM_FASTCHARGE 3
+
+#define PRECHARGE_THRESHOLD 3100
+#define POWEROFF_THRESHOLD 3400
+#define CHARGE_THRESHOLD 4000
+#define DISCHARGE_THRESHOLD 4180
+
+/* over-temperature on PM8606 setting */
+#define OVER_TEMP_FLAG (1 << 6)
+#define OVTEMP_AUTORECOVER (1 << 3)
+
+/* over-voltage protect on vchg setting mv */
+#define VCHG_NORMAL_LOW 4200
+#define VCHG_NORMAL_CHECK 5800
+#define VCHG_NORMAL_HIGH 6000
+#define VCHG_OVP_LOW 5500
+
+struct pm860x_charger_info {
+ struct pm860x_chip *chip;
+ struct i2c_client *i2c;
+ struct i2c_client *i2c_8606;
+ struct device *dev;
+
+ struct power_supply *usb;
+ struct mutex lock;
+ int irq_nums;
+ int irq[7];
+ unsigned state:3; /* fsm state */
+ unsigned online:1; /* usb charger */
+ unsigned present:1; /* battery present */
+ unsigned allowed:1;
+};
+
+static char *pm860x_supplied_to[] = {
+ "battery-monitor",
+};
+
+static int measure_vchg(struct pm860x_charger_info *info, int *data)
+{
+ unsigned char buf[2];
+ int ret = 0;
+
+ ret = pm860x_bulk_read(info->i2c, PM8607_VCHG_MEAS1, 2, buf);
+ if (ret < 0)
+ return ret;
+
+ *data = ((buf[0] & 0xff) << 4) | (buf[1] & 0x0f);
+ /* V_BATT_MEAS(mV) = value * 5 * 1.8 * 1000 / (2^12) */
+ *data = ((*data & 0xfff) * 9 * 125) >> 9;
+
+ dev_dbg(info->dev, "%s, vchg: %d mv\n", __func__, *data);
+
+ return ret;
+}
+
+static void set_vchg_threshold(struct pm860x_charger_info *info,
+ int min, int max)
+{
+ int data;
+
+ /* (tmp << 8) * / 5 / 1800 */
+ if (min <= 0)
+ data = 0;
+ else
+ data = (min << 5) / 1125;
+ pm860x_reg_write(info->i2c, PM8607_VCHG_LOWTH, data);
+ dev_dbg(info->dev, "VCHG_LOWTH:%dmv, 0x%x\n", min, data);
+
+ if (max <= 0)
+ data = 0xff;
+ else
+ data = (max << 5) / 1125;
+ pm860x_reg_write(info->i2c, PM8607_VCHG_HIGHTH, data);
+ dev_dbg(info->dev, "VCHG_HIGHTH:%dmv, 0x%x\n", max, data);
+
+}
+
+static void set_vbatt_threshold(struct pm860x_charger_info *info,
+ int min, int max)
+{
+ int data;
+
+ /* (tmp << 8) * 3 / 1800 */
+ if (min <= 0)
+ data = 0;
+ else
+ data = (min << 5) / 675;
+ pm860x_reg_write(info->i2c, PM8607_VBAT_LOWTH, data);
+ dev_dbg(info->dev, "VBAT Min:%dmv, LOWTH:0x%x\n", min, data);
+
+ if (max <= 0)
+ data = 0xff;
+ else
+ data = (max << 5) / 675;
+ pm860x_reg_write(info->i2c, PM8607_VBAT_HIGHTH, data);
+ dev_dbg(info->dev, "VBAT Max:%dmv, HIGHTH:0x%x\n", max, data);
+
+ return;
+}
+
+static int start_precharge(struct pm860x_charger_info *info)
+{
+ int ret;
+
+ dev_dbg(info->dev, "Start Pre-charging!\n");
+ set_vbatt_threshold(info, 0, 0);
+
+ ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
+ PREREG1_1350MA | PREREG1_VSYS_4_5V);
+ if (ret < 0)
+ goto out;
+ /* stop charging */
+ ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
+ CC1_MODE_OFF);
+ if (ret < 0)
+ goto out;
+ /* set 270 minutes timeout */
+ ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
+ CC3_270MIN_TIMEOUT);
+ if (ret < 0)
+ goto out;
+ /* set precharge current, termination voltage, IBAT & TBAT monitor */
+ ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL4,
+ CC4_IPRE_40MA | CC4_VPCHG_3_2V |
+ CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
+ if (ret < 0)
+ goto out;
+ ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
+ CC7_BAT_REM_EN | CC7_IFSM_EN,
+ CC7_BAT_REM_EN | CC7_IFSM_EN);
+ if (ret < 0)
+ goto out;
+ /* trigger precharge */
+ ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
+ CC1_MODE_PRECHARGE);
+out:
+ return ret;
+}
+
+static int start_fastcharge(struct pm860x_charger_info *info)
+{
+ int ret;
+
+ dev_dbg(info->dev, "Start Fast-charging!\n");
+
+ /* set fastcharge termination current & voltage, disable charging */
+ ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL1,
+ CC1_MODE_OFF | CC1_ITERM_60MA |
+ CC1_VFCHG_4_2V);
+ if (ret < 0)
+ goto out;
+ ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
+ PREREG1_540MA | PREREG1_VSYS_4_5V);
+ if (ret < 0)
+ goto out;
+ ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL2, 0x1f,
+ CC2_ICHG_500MA);
+ if (ret < 0)
+ goto out;
+ /* set 270 minutes timeout */
+ ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
+ CC3_270MIN_TIMEOUT);
+ if (ret < 0)
+ goto out;
+ /* set IBAT & TBAT monitor */
+ ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL4,
+ CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN,
+ CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
+ if (ret < 0)
+ goto out;
+ ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL6,
+ CC6_BAT_OV_EN | CC6_BAT_UV_EN |
+ CC6_UV_VBAT_SET,
+ CC6_BAT_OV_EN | CC6_BAT_UV_EN |
+ CC6_UV_VBAT_SET);
+ if (ret < 0)
+ goto out;
+ ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
+ CC7_BAT_REM_EN | CC7_IFSM_EN,
+ CC7_BAT_REM_EN | CC7_IFSM_EN);
+ if (ret < 0)
+ goto out;
+ /* launch fast-charge */
+ ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
+ CC1_MODE_FASTCHARGE);
+ /* vchg threshold setting */
+ set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_NORMAL_HIGH);
+out:
+ return ret;
+}
+
+static void stop_charge(struct pm860x_charger_info *info, int vbatt)
+{
+ dev_dbg(info->dev, "Stop charging!\n");
+ pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, CC1_MODE_OFF);
+ if (vbatt > CHARGE_THRESHOLD && info->online)
+ set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
+}
+
+static void power_off_notification(struct pm860x_charger_info *info)
+{
+ dev_dbg(info->dev, "Power-off notification!\n");
+}
+
+static int set_charging_fsm(struct pm860x_charger_info *info)
+{
+ struct power_supply *psy;
+ union power_supply_propval data;
+ unsigned char fsm_state[][16] = { "init", "discharge", "precharge",
+ "fastcharge",
+ };
+ int ret;
+ int vbatt;
+
+ psy = power_supply_get_by_name(pm860x_supplied_to[0]);
+ if (!psy)
+ return -EINVAL;
+ ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ &data);
+ if (ret) {
+ power_supply_put(psy);
+ return ret;
+ }
+ vbatt = data.intval / 1000;
+
+ ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_PRESENT, &data);
+ if (ret) {
+ power_supply_put(psy);
+ return ret;
+ }
+ power_supply_put(psy);
+
+ mutex_lock(&info->lock);
+ info->present = data.intval;
+
+ dev_dbg(info->dev, "Entering FSM:%s, Charger:%s, Battery:%s, "
+ "Allowed:%d\n",
+ &fsm_state[info->state][0],
+ (info->online) ? "online" : "N/A",
+ (info->present) ? "present" : "N/A", info->allowed);
+ dev_dbg(info->dev, "set_charging_fsm:vbatt:%d(mV)\n", vbatt);
+
+ switch (info->state) {
+ case FSM_INIT:
+ if (info->online && info->present && info->allowed) {
+ if (vbatt < PRECHARGE_THRESHOLD) {
+ info->state = FSM_PRECHARGE;
+ start_precharge(info);
+ } else if (vbatt > DISCHARGE_THRESHOLD) {
+ info->state = FSM_DISCHARGE;
+ stop_charge(info, vbatt);
+ } else if (vbatt < DISCHARGE_THRESHOLD) {
+ info->state = FSM_FASTCHARGE;
+ start_fastcharge(info);
+ }
+ } else {
+ if (vbatt < POWEROFF_THRESHOLD) {
+ power_off_notification(info);
+ } else {
+ info->state = FSM_DISCHARGE;
+ stop_charge(info, vbatt);
+ }
+ }
+ break;
+ case FSM_PRECHARGE:
+ if (info->online && info->present && info->allowed) {
+ if (vbatt > PRECHARGE_THRESHOLD) {
+ info->state = FSM_FASTCHARGE;
+ start_fastcharge(info);
+ }
+ } else {
+ info->state = FSM_DISCHARGE;
+ stop_charge(info, vbatt);
+ }
+ break;
+ case FSM_FASTCHARGE:
+ if (info->online && info->present && info->allowed) {
+ if (vbatt < PRECHARGE_THRESHOLD) {
+ info->state = FSM_PRECHARGE;
+ start_precharge(info);
+ }
+ } else {
+ info->state = FSM_DISCHARGE;
+ stop_charge(info, vbatt);
+ }
+ break;
+ case FSM_DISCHARGE:
+ if (info->online && info->present && info->allowed) {
+ if (vbatt < PRECHARGE_THRESHOLD) {
+ info->state = FSM_PRECHARGE;
+ start_precharge(info);
+ } else if (vbatt < DISCHARGE_THRESHOLD) {
+ info->state = FSM_FASTCHARGE;
+ start_fastcharge(info);
+ }
+ } else {
+ if (vbatt < POWEROFF_THRESHOLD)
+ power_off_notification(info);
+ else if (vbatt > CHARGE_THRESHOLD && info->online)
+ set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
+ }
+ break;
+ default:
+ dev_warn(info->dev, "FSM meets wrong state:%d\n",
+ info->state);
+ break;
+ }
+ dev_dbg(info->dev,
+ "Out FSM:%s, Charger:%s, Battery:%s, Allowed:%d\n",
+ &fsm_state[info->state][0],
+ (info->online) ? "online" : "N/A",
+ (info->present) ? "present" : "N/A", info->allowed);
+ mutex_unlock(&info->lock);
+
+ return 0;
+}
+
+static irqreturn_t pm860x_charger_handler(int irq, void *data)
+{
+ struct pm860x_charger_info *info = data;
+ int ret;
+
+ mutex_lock(&info->lock);
+ ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
+ if (ret < 0) {
+ mutex_unlock(&info->lock);
+ goto out;
+ }
+ if (ret & STATUS2_CHG) {
+ info->online = 1;
+ info->allowed = 1;
+ } else {
+ info->online = 0;
+ info->allowed = 0;
+ }
+ mutex_unlock(&info->lock);
+ dev_dbg(info->dev, "%s, Charger:%s, Allowed:%d\n", __func__,
+ (info->online) ? "online" : "N/A", info->allowed);
+
+ set_charging_fsm(info);
+
+ power_supply_changed(info->usb);
+out:
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pm860x_temp_handler(int irq, void *data)
+{
+ struct power_supply *psy;
+ struct pm860x_charger_info *info = data;
+ union power_supply_propval temp;
+ int value;
+ int ret;
+
+ psy = power_supply_get_by_name(pm860x_supplied_to[0]);
+ if (!psy)
+ goto out;
+ ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_TEMP, &temp);
+ if (ret)
+ goto out;
+ value = temp.intval / 10;
+
+ mutex_lock(&info->lock);
+ /* Temperature < -10 C or >40 C, Will not allow charge */
+ if (value < -10 || value > 40)
+ info->allowed = 0;
+ else
+ info->allowed = 1;
+ dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
+ mutex_unlock(&info->lock);
+
+ set_charging_fsm(info);
+out:
+ power_supply_put(psy);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pm860x_exception_handler(int irq, void *data)
+{
+ struct pm860x_charger_info *info = data;
+
+ mutex_lock(&info->lock);
+ info->allowed = 0;
+ mutex_unlock(&info->lock);
+ dev_dbg(info->dev, "%s, irq: %d\n", __func__, irq);
+
+ set_charging_fsm(info);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pm860x_done_handler(int irq, void *data)
+{
+ struct pm860x_charger_info *info = data;
+ struct power_supply *psy;
+ union power_supply_propval val;
+ int ret;
+ int vbatt;
+
+ mutex_lock(&info->lock);
+ /* pre-charge done, will transimit to fast-charge stage */
+ if (info->state == FSM_PRECHARGE) {
+ info->allowed = 1;
+ goto out;
+ }
+ /*
+ * Fast charge done, delay to read
+ * the correct status of CHG_DET.
+ */
+ mdelay(5);
+ info->allowed = 0;
+ psy = power_supply_get_by_name(pm860x_supplied_to[0]);
+ if (!psy)
+ goto out;
+ ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ &val);
+ if (ret)
+ goto out_psy_put;
+ vbatt = val.intval / 1000;
+ /*
+ * CHG_DONE interrupt is faster than CHG_DET interrupt when
+ * plug in/out usb, So we can not rely on info->online, we
+ * need check pm8607 status register to check usb is online
+ * or not, then we can decide it is real charge done
+ * automatically or it is triggered by usb plug out;
+ */
+ ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
+ if (ret < 0)
+ goto out_psy_put;
+ if (vbatt > CHARGE_THRESHOLD && ret & STATUS2_CHG)
+ power_supply_set_property(psy, POWER_SUPPLY_PROP_CHARGE_FULL,
+ &val);
+
+out_psy_put:
+ power_supply_put(psy);
+out:
+ mutex_unlock(&info->lock);
+ dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
+ set_charging_fsm(info);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pm860x_vbattery_handler(int irq, void *data)
+{
+ struct pm860x_charger_info *info = data;
+
+ mutex_lock(&info->lock);
+
+ set_vbatt_threshold(info, 0, 0);
+
+ if (info->present && info->online)
+ info->allowed = 1;
+ else
+ info->allowed = 0;
+ mutex_unlock(&info->lock);
+ dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
+
+ set_charging_fsm(info);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pm860x_vchg_handler(int irq, void *data)
+{
+ struct pm860x_charger_info *info = data;
+ int vchg = 0;
+
+ if (info->present)
+ goto out;
+
+ measure_vchg(info, &vchg);
+
+ mutex_lock(&info->lock);
+ if (!info->online) {
+ int status;
+ /* check if over-temp on pm8606 or not */
+ status = pm860x_reg_read(info->i2c_8606, PM8606_FLAGS);
+ if (status & OVER_TEMP_FLAG) {
+ /* clear over temp flag and set auto recover */
+ pm860x_set_bits(info->i2c_8606, PM8606_FLAGS,
+ OVER_TEMP_FLAG, OVER_TEMP_FLAG);
+ pm860x_set_bits(info->i2c_8606,
+ PM8606_VSYS,
+ OVTEMP_AUTORECOVER,
+ OVTEMP_AUTORECOVER);
+ dev_dbg(info->dev,
+ "%s, pm8606 over-temp occurred\n", __func__);
+ }
+ }
+
+ if (vchg > VCHG_NORMAL_CHECK) {
+ set_vchg_threshold(info, VCHG_OVP_LOW, 0);
+ info->allowed = 0;
+ dev_dbg(info->dev,
+ "%s,pm8607 over-vchg occurred,vchg = %dmv\n",
+ __func__, vchg);
+ } else if (vchg < VCHG_OVP_LOW) {
+ set_vchg_threshold(info, VCHG_NORMAL_LOW,
+ VCHG_NORMAL_HIGH);
+ info->allowed = 1;
+ dev_dbg(info->dev,
+ "%s,pm8607 over-vchg recover,vchg = %dmv\n",
+ __func__, vchg);
+ }
+ mutex_unlock(&info->lock);
+
+ dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
+ set_charging_fsm(info);
+out:
+ return IRQ_HANDLED;
+}
+
+static int pm860x_usb_get_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct pm860x_charger_info *info = power_supply_get_drvdata(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ if (info->state == FSM_FASTCHARGE ||
+ info->state == FSM_PRECHARGE)
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ break;
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = info->online;
+ break;
+ default:
+ return -ENODEV;
+ }
+ return 0;
+}
+
+static enum power_supply_property pm860x_usb_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_ONLINE,
+};
+
+static int pm860x_init_charger(struct pm860x_charger_info *info)
+{
+ int ret;
+
+ ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&info->lock);
+ info->state = FSM_INIT;
+ if (ret & STATUS2_CHG) {
+ info->online = 1;
+ info->allowed = 1;
+ } else {
+ info->online = 0;
+ info->allowed = 0;
+ }
+ mutex_unlock(&info->lock);
+
+ set_charging_fsm(info);
+ return 0;
+}
+
+static struct pm860x_irq_desc {
+ const char *name;
+ irqreturn_t (*handler)(int irq, void *data);
+} pm860x_irq_descs[] = {
+ { "usb supply detect", pm860x_charger_handler },
+ { "charge done", pm860x_done_handler },
+ { "charge timeout", pm860x_exception_handler },
+ { "charge fault", pm860x_exception_handler },
+ { "temperature", pm860x_temp_handler },
+ { "vbatt", pm860x_vbattery_handler },
+ { "vchg", pm860x_vchg_handler },
+};
+
+static const struct power_supply_desc pm860x_charger_desc = {
+ .name = "usb",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .properties = pm860x_usb_props,
+ .num_properties = ARRAY_SIZE(pm860x_usb_props),
+ .get_property = pm860x_usb_get_prop,
+};
+
+static int pm860x_charger_probe(struct platform_device *pdev)
+{
+ struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
+ struct power_supply_config psy_cfg = {};
+ struct pm860x_charger_info *info;
+ int ret;
+ int count;
+ int i;
+ int j;
+
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ count = pdev->num_resources;
+ for (i = 0, j = 0; i < count; i++) {
+ info->irq[j] = platform_get_irq(pdev, i);
+ if (info->irq[j] < 0)
+ continue;
+ j++;
+ }
+ info->irq_nums = j;
+
+ info->chip = chip;
+ info->i2c =
+ (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
+ info->i2c_8606 =
+ (chip->id == CHIP_PM8607) ? chip->companion : chip->client;
+ if (!info->i2c_8606) {
+ dev_err(&pdev->dev, "Missed I2C address of 88PM8606!\n");
+ ret = -EINVAL;
+ goto out;
+ }
+ info->dev = &pdev->dev;
+
+ /* set init value for the case we are not using battery */
+ set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_OVP_LOW);
+
+ mutex_init(&info->lock);
+ platform_set_drvdata(pdev, info);
+
+ psy_cfg.drv_data = info;
+ psy_cfg.supplied_to = pm860x_supplied_to;
+ psy_cfg.num_supplicants = ARRAY_SIZE(pm860x_supplied_to);
+ info->usb = power_supply_register(&pdev->dev, &pm860x_charger_desc,
+ &psy_cfg);
+ if (IS_ERR(info->usb)) {
+ ret = PTR_ERR(info->usb);
+ goto out;
+ }
+
+ pm860x_init_charger(info);
+
+ for (i = 0; i < ARRAY_SIZE(info->irq); i++) {
+ ret = request_threaded_irq(info->irq[i], NULL,
+ pm860x_irq_descs[i].handler,
+ IRQF_ONESHOT, pm860x_irq_descs[i].name, info);
+ if (ret < 0) {
+ dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
+ info->irq[i], ret);
+ goto out_irq;
+ }
+ }
+ return 0;
+
+out_irq:
+ power_supply_unregister(info->usb);
+ while (--i >= 0)
+ free_irq(info->irq[i], info);
+out:
+ return ret;
+}
+
+static int pm860x_charger_remove(struct platform_device *pdev)
+{
+ struct pm860x_charger_info *info = platform_get_drvdata(pdev);
+ int i;
+
+ power_supply_unregister(info->usb);
+ free_irq(info->irq[0], info);
+ for (i = 0; i < info->irq_nums; i++)
+ free_irq(info->irq[i], info);
+ return 0;
+}
+
+static struct platform_driver pm860x_charger_driver = {
+ .driver = {
+ .name = "88pm860x-charger",
+ },
+ .probe = pm860x_charger_probe,
+ .remove = pm860x_charger_remove,
+};
+module_platform_driver(pm860x_charger_driver);
+
+MODULE_DESCRIPTION("Marvell 88PM860x Charger driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff