zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/power/wm831x_power.c b/ap/os/linux/linux-3.4.x/drivers/power/wm831x_power.c
new file mode 100644
index 0000000..987332b
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/power/wm831x_power.c
@@ -0,0 +1,663 @@
+/*
+ * PMU driver for Wolfson Microelectronics wm831x PMICs
+ *
+ * Copyright 2009 Wolfson Microelectronics PLC.
+ *
+ * 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/module.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/slab.h>
+
+#include <linux/mfd/wm831x/core.h>
+#include <linux/mfd/wm831x/auxadc.h>
+#include <linux/mfd/wm831x/pmu.h>
+#include <linux/mfd/wm831x/pdata.h>
+
+struct wm831x_power {
+ struct wm831x *wm831x;
+ struct power_supply wall;
+ struct power_supply usb;
+ struct power_supply battery;
+ char wall_name[20];
+ char usb_name[20];
+ char battery_name[20];
+ bool have_battery;
+};
+
+static int wm831x_power_check_online(struct wm831x *wm831x, int supply,
+ union power_supply_propval *val)
+{
+ int ret;
+
+ ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
+ if (ret < 0)
+ return ret;
+
+ if (ret & supply)
+ val->intval = 1;
+ else
+ val->intval = 0;
+
+ return 0;
+}
+
+static int wm831x_power_read_voltage(struct wm831x *wm831x,
+ enum wm831x_auxadc src,
+ union power_supply_propval *val)
+{
+ int ret;
+
+ ret = wm831x_auxadc_read_uv(wm831x, src);
+ if (ret >= 0)
+ val->intval = ret;
+
+ return ret;
+}
+
+/*********************************************************************
+ * WALL Power
+ *********************************************************************/
+static int wm831x_wall_get_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
+ struct wm831x *wm831x = wm831x_power->wm831x;
+ int ret = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = wm831x_power_check_online(wm831x, WM831X_PWR_WALL, val);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_WALL, val);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static enum power_supply_property wm831x_wall_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+};
+
+/*********************************************************************
+ * USB Power
+ *********************************************************************/
+static int wm831x_usb_get_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
+ struct wm831x *wm831x = wm831x_power->wm831x;
+ int ret = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = wm831x_power_check_online(wm831x, WM831X_PWR_USB, val);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_USB, val);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static enum power_supply_property wm831x_usb_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+};
+
+/*********************************************************************
+ * Battery properties
+ *********************************************************************/
+
+struct chg_map {
+ int val;
+ int reg_val;
+};
+
+static struct chg_map trickle_ilims[] = {
+ { 50, 0 << WM831X_CHG_TRKL_ILIM_SHIFT },
+ { 100, 1 << WM831X_CHG_TRKL_ILIM_SHIFT },
+ { 150, 2 << WM831X_CHG_TRKL_ILIM_SHIFT },
+ { 200, 3 << WM831X_CHG_TRKL_ILIM_SHIFT },
+};
+
+static struct chg_map vsels[] = {
+ { 4050, 0 << WM831X_CHG_VSEL_SHIFT },
+ { 4100, 1 << WM831X_CHG_VSEL_SHIFT },
+ { 4150, 2 << WM831X_CHG_VSEL_SHIFT },
+ { 4200, 3 << WM831X_CHG_VSEL_SHIFT },
+};
+
+static struct chg_map fast_ilims[] = {
+ { 0, 0 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 50, 1 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 100, 2 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 150, 3 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 200, 4 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 250, 5 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 300, 6 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 350, 7 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 400, 8 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 450, 9 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 500, 10 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 600, 11 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 700, 12 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 800, 13 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 900, 14 << WM831X_CHG_FAST_ILIM_SHIFT },
+ { 1000, 15 << WM831X_CHG_FAST_ILIM_SHIFT },
+};
+
+static struct chg_map eoc_iterms[] = {
+ { 20, 0 << WM831X_CHG_ITERM_SHIFT },
+ { 30, 1 << WM831X_CHG_ITERM_SHIFT },
+ { 40, 2 << WM831X_CHG_ITERM_SHIFT },
+ { 50, 3 << WM831X_CHG_ITERM_SHIFT },
+ { 60, 4 << WM831X_CHG_ITERM_SHIFT },
+ { 70, 5 << WM831X_CHG_ITERM_SHIFT },
+ { 80, 6 << WM831X_CHG_ITERM_SHIFT },
+ { 90, 7 << WM831X_CHG_ITERM_SHIFT },
+};
+
+static struct chg_map chg_times[] = {
+ { 60, 0 << WM831X_CHG_TIME_SHIFT },
+ { 90, 1 << WM831X_CHG_TIME_SHIFT },
+ { 120, 2 << WM831X_CHG_TIME_SHIFT },
+ { 150, 3 << WM831X_CHG_TIME_SHIFT },
+ { 180, 4 << WM831X_CHG_TIME_SHIFT },
+ { 210, 5 << WM831X_CHG_TIME_SHIFT },
+ { 240, 6 << WM831X_CHG_TIME_SHIFT },
+ { 270, 7 << WM831X_CHG_TIME_SHIFT },
+ { 300, 8 << WM831X_CHG_TIME_SHIFT },
+ { 330, 9 << WM831X_CHG_TIME_SHIFT },
+ { 360, 10 << WM831X_CHG_TIME_SHIFT },
+ { 390, 11 << WM831X_CHG_TIME_SHIFT },
+ { 420, 12 << WM831X_CHG_TIME_SHIFT },
+ { 450, 13 << WM831X_CHG_TIME_SHIFT },
+ { 480, 14 << WM831X_CHG_TIME_SHIFT },
+ { 510, 15 << WM831X_CHG_TIME_SHIFT },
+};
+
+static void wm831x_battey_apply_config(struct wm831x *wm831x,
+ struct chg_map *map, int count, int val,
+ int *reg, const char *name,
+ const char *units)
+{
+ int i;
+
+ for (i = 0; i < count; i++)
+ if (val == map[i].val)
+ break;
+ if (i == count) {
+ dev_err(wm831x->dev, "Invalid %s %d%s\n",
+ name, val, units);
+ } else {
+ *reg |= map[i].reg_val;
+ dev_dbg(wm831x->dev, "Set %s of %d%s\n", name, val, units);
+ }
+}
+
+static void wm831x_config_battery(struct wm831x *wm831x)
+{
+ struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
+ struct wm831x_battery_pdata *pdata;
+ int ret, reg1, reg2;
+
+ if (!wm831x_pdata || !wm831x_pdata->battery) {
+ dev_warn(wm831x->dev,
+ "No battery charger configuration\n");
+ return;
+ }
+
+ pdata = wm831x_pdata->battery;
+
+ reg1 = 0;
+ reg2 = 0;
+
+ if (!pdata->enable) {
+ dev_info(wm831x->dev, "Battery charger disabled\n");
+ return;
+ }
+
+ reg1 |= WM831X_CHG_ENA;
+ if (pdata->off_mask)
+ reg2 |= WM831X_CHG_OFF_MSK;
+ if (pdata->fast_enable)
+ reg1 |= WM831X_CHG_FAST;
+
+ wm831x_battey_apply_config(wm831x, trickle_ilims,
+ ARRAY_SIZE(trickle_ilims),
+ pdata->trickle_ilim, ®2,
+ "trickle charge current limit", "mA");
+
+ wm831x_battey_apply_config(wm831x, vsels, ARRAY_SIZE(vsels),
+ pdata->vsel, ®2,
+ "target voltage", "mV");
+
+ wm831x_battey_apply_config(wm831x, fast_ilims, ARRAY_SIZE(fast_ilims),
+ pdata->fast_ilim, ®2,
+ "fast charge current limit", "mA");
+
+ wm831x_battey_apply_config(wm831x, eoc_iterms, ARRAY_SIZE(eoc_iterms),
+ pdata->eoc_iterm, ®1,
+ "end of charge current threshold", "mA");
+
+ wm831x_battey_apply_config(wm831x, chg_times, ARRAY_SIZE(chg_times),
+ pdata->timeout, ®2,
+ "charger timeout", "min");
+
+ ret = wm831x_reg_unlock(wm831x);
+ if (ret != 0) {
+ dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret);
+ return;
+ }
+
+ ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_1,
+ WM831X_CHG_ENA_MASK |
+ WM831X_CHG_FAST_MASK |
+ WM831X_CHG_ITERM_MASK,
+ reg1);
+ if (ret != 0)
+ dev_err(wm831x->dev, "Failed to set charger control 1: %d\n",
+ ret);
+
+ ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_2,
+ WM831X_CHG_OFF_MSK |
+ WM831X_CHG_TIME_MASK |
+ WM831X_CHG_FAST_ILIM_MASK |
+ WM831X_CHG_TRKL_ILIM_MASK |
+ WM831X_CHG_VSEL_MASK,
+ reg2);
+ if (ret != 0)
+ dev_err(wm831x->dev, "Failed to set charger control 2: %d\n",
+ ret);
+
+ wm831x_reg_lock(wm831x);
+}
+
+static int wm831x_bat_check_status(struct wm831x *wm831x, int *status)
+{
+ int ret;
+
+ ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
+ if (ret < 0)
+ return ret;
+
+ if (ret & WM831X_PWR_SRC_BATT) {
+ *status = POWER_SUPPLY_STATUS_DISCHARGING;
+ return 0;
+ }
+
+ ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
+ if (ret < 0)
+ return ret;
+
+ switch (ret & WM831X_CHG_STATE_MASK) {
+ case WM831X_CHG_STATE_OFF:
+ *status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+ case WM831X_CHG_STATE_TRICKLE:
+ case WM831X_CHG_STATE_FAST:
+ *status = POWER_SUPPLY_STATUS_CHARGING;
+ break;
+
+ default:
+ *status = POWER_SUPPLY_STATUS_UNKNOWN;
+ break;
+ }
+
+ return 0;
+}
+
+static int wm831x_bat_check_type(struct wm831x *wm831x, int *type)
+{
+ int ret;
+
+ ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
+ if (ret < 0)
+ return ret;
+
+ switch (ret & WM831X_CHG_STATE_MASK) {
+ case WM831X_CHG_STATE_TRICKLE:
+ case WM831X_CHG_STATE_TRICKLE_OT:
+ *type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+ break;
+ case WM831X_CHG_STATE_FAST:
+ case WM831X_CHG_STATE_FAST_OT:
+ *type = POWER_SUPPLY_CHARGE_TYPE_FAST;
+ break;
+ default:
+ *type = POWER_SUPPLY_CHARGE_TYPE_NONE;
+ break;
+ }
+
+ return 0;
+}
+
+static int wm831x_bat_check_health(struct wm831x *wm831x, int *health)
+{
+ int ret;
+
+ ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
+ if (ret < 0)
+ return ret;
+
+ if (ret & WM831X_BATT_HOT_STS) {
+ *health = POWER_SUPPLY_HEALTH_OVERHEAT;
+ return 0;
+ }
+
+ if (ret & WM831X_BATT_COLD_STS) {
+ *health = POWER_SUPPLY_HEALTH_COLD;
+ return 0;
+ }
+
+ if (ret & WM831X_BATT_OV_STS) {
+ *health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ return 0;
+ }
+
+ switch (ret & WM831X_CHG_STATE_MASK) {
+ case WM831X_CHG_STATE_TRICKLE_OT:
+ case WM831X_CHG_STATE_FAST_OT:
+ *health = POWER_SUPPLY_HEALTH_OVERHEAT;
+ break;
+ case WM831X_CHG_STATE_DEFECTIVE:
+ *health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ break;
+ default:
+ *health = POWER_SUPPLY_HEALTH_GOOD;
+ break;
+ }
+
+ return 0;
+}
+
+static int wm831x_bat_get_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
+ struct wm831x *wm831x = wm831x_power->wm831x;
+ int ret = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ ret = wm831x_bat_check_status(wm831x, &val->intval);
+ break;
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = wm831x_power_check_online(wm831x, WM831X_PWR_SRC_BATT,
+ val);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BATT, val);
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ ret = wm831x_bat_check_health(wm831x, &val->intval);
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ ret = wm831x_bat_check_type(wm831x, &val->intval);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static enum power_supply_property wm831x_bat_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+};
+
+static const char *wm831x_bat_irqs[] = {
+ "BATT HOT",
+ "BATT COLD",
+ "BATT FAIL",
+ "OV",
+ "END",
+ "TO",
+ "MODE",
+ "START",
+};
+
+static irqreturn_t wm831x_bat_irq(int irq, void *data)
+{
+ struct wm831x_power *wm831x_power = data;
+ struct wm831x *wm831x = wm831x_power->wm831x;
+
+ dev_dbg(wm831x->dev, "Battery status changed: %d\n", irq);
+
+ /* The battery charger is autonomous so we don't need to do
+ * anything except kick user space */
+ if (wm831x_power->have_battery)
+ power_supply_changed(&wm831x_power->battery);
+
+ return IRQ_HANDLED;
+}
+
+
+/*********************************************************************
+ * Initialisation
+ *********************************************************************/
+
+static irqreturn_t wm831x_syslo_irq(int irq, void *data)
+{
+ struct wm831x_power *wm831x_power = data;
+ struct wm831x *wm831x = wm831x_power->wm831x;
+
+ /* Not much we can actually *do* but tell people for
+ * posterity, we're probably about to run out of power. */
+ dev_crit(wm831x->dev, "SYSVDD under voltage\n");
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t wm831x_pwr_src_irq(int irq, void *data)
+{
+ struct wm831x_power *wm831x_power = data;
+ struct wm831x *wm831x = wm831x_power->wm831x;
+
+ dev_dbg(wm831x->dev, "Power source changed\n");
+
+ /* Just notify for everything - little harm in overnotifying. */
+ if (wm831x_power->have_battery)
+ power_supply_changed(&wm831x_power->battery);
+ power_supply_changed(&wm831x_power->usb);
+ power_supply_changed(&wm831x_power->wall);
+
+ return IRQ_HANDLED;
+}
+
+static __devinit int wm831x_power_probe(struct platform_device *pdev)
+{
+ struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
+ struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
+ struct wm831x_power *power;
+ struct power_supply *usb;
+ struct power_supply *battery;
+ struct power_supply *wall;
+ int ret, irq, i;
+
+ power = kzalloc(sizeof(struct wm831x_power), GFP_KERNEL);
+ if (power == NULL)
+ return -ENOMEM;
+
+ power->wm831x = wm831x;
+ platform_set_drvdata(pdev, power);
+
+ usb = &power->usb;
+ battery = &power->battery;
+ wall = &power->wall;
+
+ if (wm831x_pdata && wm831x_pdata->wm831x_num) {
+ snprintf(power->wall_name, sizeof(power->wall_name),
+ "wm831x-wall.%d", wm831x_pdata->wm831x_num);
+ snprintf(power->battery_name, sizeof(power->wall_name),
+ "wm831x-battery.%d", wm831x_pdata->wm831x_num);
+ snprintf(power->usb_name, sizeof(power->wall_name),
+ "wm831x-usb.%d", wm831x_pdata->wm831x_num);
+ } else {
+ snprintf(power->wall_name, sizeof(power->wall_name),
+ "wm831x-wall");
+ snprintf(power->battery_name, sizeof(power->wall_name),
+ "wm831x-battery");
+ snprintf(power->usb_name, sizeof(power->wall_name),
+ "wm831x-usb");
+ }
+
+ /* We ignore configuration failures since we can still read back
+ * the status without enabling the charger.
+ */
+ wm831x_config_battery(wm831x);
+
+ wall->name = power->wall_name;
+ wall->type = POWER_SUPPLY_TYPE_MAINS;
+ wall->properties = wm831x_wall_props;
+ wall->num_properties = ARRAY_SIZE(wm831x_wall_props);
+ wall->get_property = wm831x_wall_get_prop;
+ ret = power_supply_register(&pdev->dev, wall);
+ if (ret)
+ goto err_kmalloc;
+
+ usb->name = power->usb_name,
+ usb->type = POWER_SUPPLY_TYPE_USB;
+ usb->properties = wm831x_usb_props;
+ usb->num_properties = ARRAY_SIZE(wm831x_usb_props);
+ usb->get_property = wm831x_usb_get_prop;
+ ret = power_supply_register(&pdev->dev, usb);
+ if (ret)
+ goto err_wall;
+
+ ret = wm831x_reg_read(wm831x, WM831X_CHARGER_CONTROL_1);
+ if (ret < 0)
+ goto err_wall;
+ power->have_battery = ret & WM831X_CHG_ENA;
+
+ if (power->have_battery) {
+ battery->name = power->battery_name;
+ battery->properties = wm831x_bat_props;
+ battery->num_properties = ARRAY_SIZE(wm831x_bat_props);
+ battery->get_property = wm831x_bat_get_prop;
+ battery->use_for_apm = 1;
+ ret = power_supply_register(&pdev->dev, battery);
+ if (ret)
+ goto err_usb;
+ }
+
+ irq = platform_get_irq_byname(pdev, "SYSLO");
+ ret = request_threaded_irq(irq, NULL, wm831x_syslo_irq,
+ IRQF_TRIGGER_RISING, "System power low",
+ power);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n",
+ irq, ret);
+ goto err_battery;
+ }
+
+ irq = platform_get_irq_byname(pdev, "PWR SRC");
+ ret = request_threaded_irq(irq, NULL, wm831x_pwr_src_irq,
+ IRQF_TRIGGER_RISING, "Power source",
+ power);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to request PWR SRC IRQ %d: %d\n",
+ irq, ret);
+ goto err_syslo;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
+ irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
+ ret = request_threaded_irq(irq, NULL, wm831x_bat_irq,
+ IRQF_TRIGGER_RISING,
+ wm831x_bat_irqs[i],
+ power);
+ if (ret != 0) {
+ dev_err(&pdev->dev,
+ "Failed to request %s IRQ %d: %d\n",
+ wm831x_bat_irqs[i], irq, ret);
+ goto err_bat_irq;
+ }
+ }
+
+ return ret;
+
+err_bat_irq:
+ for (; i >= 0; i--) {
+ irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
+ free_irq(irq, power);
+ }
+ irq = platform_get_irq_byname(pdev, "PWR SRC");
+ free_irq(irq, power);
+err_syslo:
+ irq = platform_get_irq_byname(pdev, "SYSLO");
+ free_irq(irq, power);
+err_battery:
+ if (power->have_battery)
+ power_supply_unregister(battery);
+err_usb:
+ power_supply_unregister(usb);
+err_wall:
+ power_supply_unregister(wall);
+err_kmalloc:
+ kfree(power);
+ return ret;
+}
+
+static __devexit int wm831x_power_remove(struct platform_device *pdev)
+{
+ struct wm831x_power *wm831x_power = platform_get_drvdata(pdev);
+ int irq, i;
+
+ for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
+ irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
+ free_irq(irq, wm831x_power);
+ }
+
+ irq = platform_get_irq_byname(pdev, "PWR SRC");
+ free_irq(irq, wm831x_power);
+
+ irq = platform_get_irq_byname(pdev, "SYSLO");
+ free_irq(irq, wm831x_power);
+
+ if (wm831x_power->have_battery)
+ power_supply_unregister(&wm831x_power->battery);
+ power_supply_unregister(&wm831x_power->wall);
+ power_supply_unregister(&wm831x_power->usb);
+ kfree(wm831x_power);
+ return 0;
+}
+
+static struct platform_driver wm831x_power_driver = {
+ .probe = wm831x_power_probe,
+ .remove = __devexit_p(wm831x_power_remove),
+ .driver = {
+ .name = "wm831x-power",
+ },
+};
+
+module_platform_driver(wm831x_power_driver);
+
+MODULE_DESCRIPTION("Power supply driver for WM831x PMICs");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:wm831x-power");