[PATCH] power_supply: Add driver for the PMU on WM831x PMICs

From: Mark Brown
Date: Sat Sep 05 2009 - 09:06:35 EST

The WM831x PMICs provide power path management from three sources:
a wall supply, USB and a battery with integrated charger. They also
provide an additional backup supply with integrated for maintaining
always on functionality such as the RTC and monitoring of power
switches.

After some initial configuration at startup the device operates
autonomously, the driver simply provides reporting of the current
state.

Signed-off-by: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Cc: Anton Vorontsov <cbouatmailru@xxxxxxxxx
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
---

This uses the new charger state feature of the power supply subsystem
so won't build in the MFD tree as-is - unless Samuel is OK with the
breakage it'd be better to go via the power tree, the dependency on the
core driver will avoid build issues there.

I'm fairly sure Anton said that he'd applied it previously but it
doesn't appear to have shown up in -next yet so I'm resending it.

drivers/power/Kconfig | 7 +
drivers/power/Makefile | 1 +
drivers/power/wm831x_power.c | 779 ++++++++++++++++++++++++++++++++++++++++
include/linux/mfd/wm831x/pmu.h | 189 ++++++++++
4 files changed, 976 insertions(+), 0 deletions(-)
create mode 100644 drivers/power/wm831x_power.c
create mode 100644 include/linux/mfd/wm831x/pmu.h

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index bdbc4f7..343194c 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -29,6 +29,13 @@ config APM_POWER
Say Y here to enable support APM status emulation using
battery class devices.

+config WM831X_POWER
+ tristate "WM831X PMU support"
+ depends on MFD_WM831X
+ help
+ Say Y here to enable support for the power management unit
+ provided by Wolfson Microelectronics WM831x PMICs.
+
config WM8350_POWER
tristate "WM8350 PMU support"
depends on MFD_WM8350
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 380d17c..b96f29d 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_POWER_SUPPLY) += power_supply.o

obj-$(CONFIG_PDA_POWER) += pda_power.o
obj-$(CONFIG_APM_POWER) += apm_power.o
+obj-$(CONFIG_WM831X_POWER) += wm831x_power.o
obj-$(CONFIG_WM8350_POWER) += wm8350_power.o

obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
diff --git a/drivers/power/wm831x_power.c b/drivers/power/wm831x_power.c
new file mode 100644
index 0000000..2a4c8b0
--- /dev/null
+++ b/drivers/power/wm831x_power.c
@@ -0,0 +1,779 @@
+/*
+ * 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/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 backup;
+ struct power_supply usb;
+ struct power_supply 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, &reg2,
+ "trickle charge current limit", "mA");
+
+ wm831x_battey_apply_config(wm831x, vsels, ARRAY_SIZE(vsels),
+ pdata->vsel, &reg2,
+ "target voltage", "mV");
+
+ wm831x_battey_apply_config(wm831x, fast_ilims, ARRAY_SIZE(fast_ilims),
+ pdata->fast_ilim, &reg2,
+ "fast charge current limit", "mA");
+
+ wm831x_battey_apply_config(wm831x, eoc_iterms, ARRAY_SIZE(eoc_iterms),
+ pdata->eoc_iterm, &reg1,
+ "end of charge current threshold", "mA");
+
+ wm831x_battey_apply_config(wm831x, chg_times, ARRAY_SIZE(chg_times),
+ pdata->timeout, &reg2,
+ "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 |
+ 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 */
+ power_supply_changed(&wm831x_power->battery);
+
+ return IRQ_HANDLED;
+}
+
+
+/*********************************************************************
+ * Backup supply properties
+ *********************************************************************/
+
+static void wm831x_config_backup(struct wm831x *wm831x)
+{
+ struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
+ struct wm831x_backup_pdata *pdata;
+ int ret, reg;
+
+ if (!wm831x_pdata || !wm831x_pdata->backup) {
+ dev_warn(wm831x->dev,
+ "No backup battery charger configuration\n");
+ return;
+ }
+
+ pdata = wm831x_pdata->backup;
+
+ reg = 0;
+
+ if (pdata->charger_enable)
+ reg |= WM831X_BKUP_CHG_ENA | WM831X_BKUP_BATT_DET_ENA;
+ if (pdata->no_constant_voltage)
+ reg |= WM831X_BKUP_CHG_MODE;
+
+ switch (pdata->vlim) {
+ case 2500:
+ break;
+ case 3100:
+ reg |= WM831X_BKUP_CHG_VLIM;
+ break;
+ default:
+ dev_err(wm831x->dev, "Invalid backup voltage limit %dmV\n",
+ pdata->vlim);
+ }
+
+ switch (pdata->ilim) {
+ case 100:
+ break;
+ case 200:
+ reg |= 1;
+ break;
+ case 300:
+ reg |= 2;
+ break;
+ case 400:
+ reg |= 3;
+ break;
+ default:
+ dev_err(wm831x->dev, "Invalid backup current limit %duA\n",
+ pdata->ilim);
+ }
+
+ 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_BACKUP_CHARGER_CONTROL,
+ WM831X_BKUP_CHG_ENA_MASK |
+ WM831X_BKUP_CHG_MODE_MASK |
+ WM831X_BKUP_BATT_DET_ENA_MASK |
+ WM831X_BKUP_CHG_VLIM_MASK |
+ WM831X_BKUP_CHG_ILIM_MASK,
+ reg);
+ if (ret != 0)
+ dev_err(wm831x->dev,
+ "Failed to set backup charger config: %d\n", ret);
+
+ wm831x_reg_lock(wm831x);
+}
+
+static int wm831x_backup_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;
+
+ ret = wm831x_reg_read(wm831x, WM831X_BACKUP_CHARGER_CONTROL);
+ if (ret < 0)
+ return ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ if (ret & WM831X_BKUP_CHG_STS)
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BKUP_BATT,
+ val);
+ break;
+
+ case POWER_SUPPLY_PROP_PRESENT:
+ if (ret & WM831X_BKUP_CHG_STS)
+ val->intval = 1;
+ else
+ val->intval = 0;
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static enum power_supply_property wm831x_backup_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_PRESENT,
+};
+
+/*********************************************************************
+ * 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.
+ * The backup battery is not a power source while the system
+ * is running so skip that.
+ */
+ 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_power *power;
+ struct power_supply *usb;
+ struct power_supply *battery;
+ struct power_supply *wall;
+ struct power_supply *backup;
+ 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;
+ backup = &power->backup;
+
+ /* We ignore configuration failures since we can still read back
+ * the status without enabling either of the chargers.
+ */
+ wm831x_config_battery(wm831x);
+ wm831x_config_backup(wm831x);
+
+ wall->name = "wm831x-wall";
+ 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;
+
+ battery->name = "wm831x-battery";
+ 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_wall;
+
+ usb->name = "wm831x-usb",
+ 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_battery;
+
+ backup->name = "wm831x-backup";
+ backup->type = POWER_SUPPLY_TYPE_BATTERY;
+ backup->properties = wm831x_backup_props;
+ backup->num_properties = ARRAY_SIZE(wm831x_backup_props);
+ backup->get_property = wm831x_backup_get_prop;
+ ret = power_supply_register(&pdev->dev, backup);
+ if (ret)
+ goto err_usb;
+
+ irq = platform_get_irq_byname(pdev, "SYSLO");
+ ret = wm831x_request_irq(wm831x, irq, wm831x_syslo_irq,
+ IRQF_TRIGGER_RISING, "SYSLO",
+ power);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n",
+ irq, ret);
+ goto err_backup;
+ }
+
+ irq = platform_get_irq_byname(pdev, "PWR SRC");
+ ret = wm831x_request_irq(wm831x, irq, 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 = wm831x_request_irq(wm831x, irq, 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]);
+ wm831x_free_irq(wm831x, irq, power);
+ }
+ irq = platform_get_irq_byname(pdev, "PWR SRC");
+ wm831x_free_irq(wm831x, irq, power);
+err_syslo:
+ irq = platform_get_irq_byname(pdev, "SYSLO");
+ wm831x_free_irq(wm831x, irq, power);
+err_backup:
+ power_supply_unregister(backup);
+err_usb:
+ power_supply_unregister(usb);
+err_battery:
+ power_supply_unregister(battery);
+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);
+ struct wm831x *wm831x = wm831x_power->wm831x;
+ int irq, i;
+
+ for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
+ irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
+ wm831x_free_irq(wm831x, irq, wm831x_power);
+ }
+
+ irq = platform_get_irq_byname(pdev, "PWR SRC");
+ wm831x_free_irq(wm831x, irq, wm831x_power);
+
+ irq = platform_get_irq_byname(pdev, "SYSLO");
+ wm831x_free_irq(wm831x, irq, wm831x_power);
+
+ power_supply_unregister(&wm831x_power->backup);
+ power_supply_unregister(&wm831x_power->battery);
+ power_supply_unregister(&wm831x_power->wall);
+ power_supply_unregister(&wm831x_power->usb);
+ return 0;
+}
+
+static struct platform_driver wm831x_power_driver = {
+ .probe = wm831x_power_probe,
+ .remove = __devexit_p(wm831x_power_remove),
+ .driver = {
+ .name = "wm831x-power",
+ },
+};
+
+static int __init wm831x_power_init(void)
+{
+ return platform_driver_register(&wm831x_power_driver);
+}
+module_init(wm831x_power_init);
+
+static void __exit wm831x_power_exit(void)
+{
+ platform_driver_unregister(&wm831x_power_driver);
+}
+module_exit(wm831x_power_exit);
+
+MODULE_DESCRIPTION("Power supply driver for WM831x PMICs");
+MODULE_AUTHOR("Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:wm831x-power");
diff --git a/include/linux/mfd/wm831x/pmu.h b/include/linux/mfd/wm831x/pmu.h
new file mode 100644
index 0000000..b18cbb0
--- /dev/null
+++ b/include/linux/mfd/wm831x/pmu.h
@@ -0,0 +1,189 @@
+/*
+ * include/linux/mfd/wm831x/pmu.h -- PMU for WM831x
+ *
+ * Copyright 2009 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#ifndef __MFD_WM831X_PMU_H__
+#define __MFD_WM831X_PMU_H__
+
+/*
+ * R16387 (0x4003) - Power State
+ */
+#define WM831X_CHIP_ON 0x8000 /* CHIP_ON */
+#define WM831X_CHIP_ON_MASK 0x8000 /* CHIP_ON */
+#define WM831X_CHIP_ON_SHIFT 15 /* CHIP_ON */
+#define WM831X_CHIP_ON_WIDTH 1 /* CHIP_ON */
+#define WM831X_CHIP_SLP 0x4000 /* CHIP_SLP */
+#define WM831X_CHIP_SLP_MASK 0x4000 /* CHIP_SLP */
+#define WM831X_CHIP_SLP_SHIFT 14 /* CHIP_SLP */
+#define WM831X_CHIP_SLP_WIDTH 1 /* CHIP_SLP */
+#define WM831X_REF_LP 0x1000 /* REF_LP */
+#define WM831X_REF_LP_MASK 0x1000 /* REF_LP */
+#define WM831X_REF_LP_SHIFT 12 /* REF_LP */
+#define WM831X_REF_LP_WIDTH 1 /* REF_LP */
+#define WM831X_PWRSTATE_DLY_MASK 0x0C00 /* PWRSTATE_DLY - [11:10] */
+#define WM831X_PWRSTATE_DLY_SHIFT 10 /* PWRSTATE_DLY - [11:10] */
+#define WM831X_PWRSTATE_DLY_WIDTH 2 /* PWRSTATE_DLY - [11:10] */
+#define WM831X_SWRST_DLY 0x0200 /* SWRST_DLY */
+#define WM831X_SWRST_DLY_MASK 0x0200 /* SWRST_DLY */
+#define WM831X_SWRST_DLY_SHIFT 9 /* SWRST_DLY */
+#define WM831X_SWRST_DLY_WIDTH 1 /* SWRST_DLY */
+#define WM831X_USB100MA_STARTUP_MASK 0x0030 /* USB100MA_STARTUP - [5:4] */
+#define WM831X_USB100MA_STARTUP_SHIFT 4 /* USB100MA_STARTUP - [5:4] */
+#define WM831X_USB100MA_STARTUP_WIDTH 2 /* USB100MA_STARTUP - [5:4] */
+#define WM831X_USB_CURR_STS 0x0008 /* USB_CURR_STS */
+#define WM831X_USB_CURR_STS_MASK 0x0008 /* USB_CURR_STS */
+#define WM831X_USB_CURR_STS_SHIFT 3 /* USB_CURR_STS */
+#define WM831X_USB_CURR_STS_WIDTH 1 /* USB_CURR_STS */
+#define WM831X_USB_ILIM_MASK 0x0007 /* USB_ILIM - [2:0] */
+#define WM831X_USB_ILIM_SHIFT 0 /* USB_ILIM - [2:0] */
+#define WM831X_USB_ILIM_WIDTH 3 /* USB_ILIM - [2:0] */
+
+/*
+ * R16397 (0x400D) - System Status
+ */
+#define WM831X_THW_STS 0x8000 /* THW_STS */
+#define WM831X_THW_STS_MASK 0x8000 /* THW_STS */
+#define WM831X_THW_STS_SHIFT 15 /* THW_STS */
+#define WM831X_THW_STS_WIDTH 1 /* THW_STS */
+#define WM831X_PWR_SRC_BATT 0x0400 /* PWR_SRC_BATT */
+#define WM831X_PWR_SRC_BATT_MASK 0x0400 /* PWR_SRC_BATT */
+#define WM831X_PWR_SRC_BATT_SHIFT 10 /* PWR_SRC_BATT */
+#define WM831X_PWR_SRC_BATT_WIDTH 1 /* PWR_SRC_BATT */
+#define WM831X_PWR_WALL 0x0200 /* PWR_WALL */
+#define WM831X_PWR_WALL_MASK 0x0200 /* PWR_WALL */
+#define WM831X_PWR_WALL_SHIFT 9 /* PWR_WALL */
+#define WM831X_PWR_WALL_WIDTH 1 /* PWR_WALL */
+#define WM831X_PWR_USB 0x0100 /* PWR_USB */
+#define WM831X_PWR_USB_MASK 0x0100 /* PWR_USB */
+#define WM831X_PWR_USB_SHIFT 8 /* PWR_USB */
+#define WM831X_PWR_USB_WIDTH 1 /* PWR_USB */
+#define WM831X_MAIN_STATE_MASK 0x001F /* MAIN_STATE - [4:0] */
+#define WM831X_MAIN_STATE_SHIFT 0 /* MAIN_STATE - [4:0] */
+#define WM831X_MAIN_STATE_WIDTH 5 /* MAIN_STATE - [4:0] */
+
+/*
+ * R16456 (0x4048) - Charger Control 1
+ */
+#define WM831X_CHG_ENA 0x8000 /* CHG_ENA */
+#define WM831X_CHG_ENA_MASK 0x8000 /* CHG_ENA */
+#define WM831X_CHG_ENA_SHIFT 15 /* CHG_ENA */
+#define WM831X_CHG_ENA_WIDTH 1 /* CHG_ENA */
+#define WM831X_CHG_FRC 0x4000 /* CHG_FRC */
+#define WM831X_CHG_FRC_MASK 0x4000 /* CHG_FRC */
+#define WM831X_CHG_FRC_SHIFT 14 /* CHG_FRC */
+#define WM831X_CHG_FRC_WIDTH 1 /* CHG_FRC */
+#define WM831X_CHG_ITERM_MASK 0x1C00 /* CHG_ITERM - [12:10] */
+#define WM831X_CHG_ITERM_SHIFT 10 /* CHG_ITERM - [12:10] */
+#define WM831X_CHG_ITERM_WIDTH 3 /* CHG_ITERM - [12:10] */
+#define WM831X_CHG_FAST 0x0020 /* CHG_FAST */
+#define WM831X_CHG_FAST_MASK 0x0020 /* CHG_FAST */
+#define WM831X_CHG_FAST_SHIFT 5 /* CHG_FAST */
+#define WM831X_CHG_FAST_WIDTH 1 /* CHG_FAST */
+#define WM831X_CHG_IMON_ENA 0x0002 /* CHG_IMON_ENA */
+#define WM831X_CHG_IMON_ENA_MASK 0x0002 /* CHG_IMON_ENA */
+#define WM831X_CHG_IMON_ENA_SHIFT 1 /* CHG_IMON_ENA */
+#define WM831X_CHG_IMON_ENA_WIDTH 1 /* CHG_IMON_ENA */
+#define WM831X_CHG_CHIP_TEMP_MON 0x0001 /* CHG_CHIP_TEMP_MON */
+#define WM831X_CHG_CHIP_TEMP_MON_MASK 0x0001 /* CHG_CHIP_TEMP_MON */
+#define WM831X_CHG_CHIP_TEMP_MON_SHIFT 0 /* CHG_CHIP_TEMP_MON */
+#define WM831X_CHG_CHIP_TEMP_MON_WIDTH 1 /* CHG_CHIP_TEMP_MON */
+
+/*
+ * R16457 (0x4049) - Charger Control 2
+ */
+#define WM831X_CHG_OFF_MSK 0x4000 /* CHG_OFF_MSK */
+#define WM831X_CHG_OFF_MSK_MASK 0x4000 /* CHG_OFF_MSK */
+#define WM831X_CHG_OFF_MSK_SHIFT 14 /* CHG_OFF_MSK */
+#define WM831X_CHG_OFF_MSK_WIDTH 1 /* CHG_OFF_MSK */
+#define WM831X_CHG_TIME_MASK 0x0F00 /* CHG_TIME - [11:8] */
+#define WM831X_CHG_TIME_SHIFT 8 /* CHG_TIME - [11:8] */
+#define WM831X_CHG_TIME_WIDTH 4 /* CHG_TIME - [11:8] */
+#define WM831X_CHG_TRKL_ILIM_MASK 0x00C0 /* CHG_TRKL_ILIM - [7:6] */
+#define WM831X_CHG_TRKL_ILIM_SHIFT 6 /* CHG_TRKL_ILIM - [7:6] */
+#define WM831X_CHG_TRKL_ILIM_WIDTH 2 /* CHG_TRKL_ILIM - [7:6] */
+#define WM831X_CHG_VSEL_MASK 0x0030 /* CHG_VSEL - [5:4] */
+#define WM831X_CHG_VSEL_SHIFT 4 /* CHG_VSEL - [5:4] */
+#define WM831X_CHG_VSEL_WIDTH 2 /* CHG_VSEL - [5:4] */
+#define WM831X_CHG_FAST_ILIM_MASK 0x000F /* CHG_FAST_ILIM - [3:0] */
+#define WM831X_CHG_FAST_ILIM_SHIFT 0 /* CHG_FAST_ILIM - [3:0] */
+#define WM831X_CHG_FAST_ILIM_WIDTH 4 /* CHG_FAST_ILIM - [3:0] */
+
+/*
+ * R16458 (0x404A) - Charger Status
+ */
+#define WM831X_BATT_OV_STS 0x8000 /* BATT_OV_STS */
+#define WM831X_BATT_OV_STS_MASK 0x8000 /* BATT_OV_STS */
+#define WM831X_BATT_OV_STS_SHIFT 15 /* BATT_OV_STS */
+#define WM831X_BATT_OV_STS_WIDTH 1 /* BATT_OV_STS */
+#define WM831X_CHG_STATE_MASK 0x7000 /* CHG_STATE - [14:12] */
+#define WM831X_CHG_STATE_SHIFT 12 /* CHG_STATE - [14:12] */
+#define WM831X_CHG_STATE_WIDTH 3 /* CHG_STATE - [14:12] */
+#define WM831X_BATT_HOT_STS 0x0800 /* BATT_HOT_STS */
+#define WM831X_BATT_HOT_STS_MASK 0x0800 /* BATT_HOT_STS */
+#define WM831X_BATT_HOT_STS_SHIFT 11 /* BATT_HOT_STS */
+#define WM831X_BATT_HOT_STS_WIDTH 1 /* BATT_HOT_STS */
+#define WM831X_BATT_COLD_STS 0x0400 /* BATT_COLD_STS */
+#define WM831X_BATT_COLD_STS_MASK 0x0400 /* BATT_COLD_STS */
+#define WM831X_BATT_COLD_STS_SHIFT 10 /* BATT_COLD_STS */
+#define WM831X_BATT_COLD_STS_WIDTH 1 /* BATT_COLD_STS */
+#define WM831X_CHG_TOPOFF 0x0200 /* CHG_TOPOFF */
+#define WM831X_CHG_TOPOFF_MASK 0x0200 /* CHG_TOPOFF */
+#define WM831X_CHG_TOPOFF_SHIFT 9 /* CHG_TOPOFF */
+#define WM831X_CHG_TOPOFF_WIDTH 1 /* CHG_TOPOFF */
+#define WM831X_CHG_ACTIVE 0x0100 /* CHG_ACTIVE */
+#define WM831X_CHG_ACTIVE_MASK 0x0100 /* CHG_ACTIVE */
+#define WM831X_CHG_ACTIVE_SHIFT 8 /* CHG_ACTIVE */
+#define WM831X_CHG_ACTIVE_WIDTH 1 /* CHG_ACTIVE */
+#define WM831X_CHG_TIME_ELAPSED_MASK 0x00FF /* CHG_TIME_ELAPSED - [7:0] */
+#define WM831X_CHG_TIME_ELAPSED_SHIFT 0 /* CHG_TIME_ELAPSED - [7:0] */
+#define WM831X_CHG_TIME_ELAPSED_WIDTH 8 /* CHG_TIME_ELAPSED - [7:0] */
+
+#define WM831X_CHG_STATE_OFF (0 << WM831X_CHG_STATE_SHIFT)
+#define WM831X_CHG_STATE_TRICKLE (1 << WM831X_CHG_STATE_SHIFT)
+#define WM831X_CHG_STATE_FAST (2 << WM831X_CHG_STATE_SHIFT)
+#define WM831X_CHG_STATE_TRICKLE_OT (3 << WM831X_CHG_STATE_SHIFT)
+#define WM831X_CHG_STATE_FAST_OT (4 << WM831X_CHG_STATE_SHIFT)
+#define WM831X_CHG_STATE_DEFECTIVE (5 << WM831X_CHG_STATE_SHIFT)
+
+/*
+ * R16459 (0x404B) - Backup Charger Control
+ */
+#define WM831X_BKUP_CHG_ENA 0x8000 /* BKUP_CHG_ENA */
+#define WM831X_BKUP_CHG_ENA_MASK 0x8000 /* BKUP_CHG_ENA */
+#define WM831X_BKUP_CHG_ENA_SHIFT 15 /* BKUP_CHG_ENA */
+#define WM831X_BKUP_CHG_ENA_WIDTH 1 /* BKUP_CHG_ENA */
+#define WM831X_BKUP_CHG_STS 0x4000 /* BKUP_CHG_STS */
+#define WM831X_BKUP_CHG_STS_MASK 0x4000 /* BKUP_CHG_STS */
+#define WM831X_BKUP_CHG_STS_SHIFT 14 /* BKUP_CHG_STS */
+#define WM831X_BKUP_CHG_STS_WIDTH 1 /* BKUP_CHG_STS */
+#define WM831X_BKUP_CHG_MODE 0x1000 /* BKUP_CHG_MODE */
+#define WM831X_BKUP_CHG_MODE_MASK 0x1000 /* BKUP_CHG_MODE */
+#define WM831X_BKUP_CHG_MODE_SHIFT 12 /* BKUP_CHG_MODE */
+#define WM831X_BKUP_CHG_MODE_WIDTH 1 /* BKUP_CHG_MODE */
+#define WM831X_BKUP_BATT_DET_ENA 0x0800 /* BKUP_BATT_DET_ENA */
+#define WM831X_BKUP_BATT_DET_ENA_MASK 0x0800 /* BKUP_BATT_DET_ENA */
+#define WM831X_BKUP_BATT_DET_ENA_SHIFT 11 /* BKUP_BATT_DET_ENA */
+#define WM831X_BKUP_BATT_DET_ENA_WIDTH 1 /* BKUP_BATT_DET_ENA */
+#define WM831X_BKUP_BATT_STS 0x0400 /* BKUP_BATT_STS */
+#define WM831X_BKUP_BATT_STS_MASK 0x0400 /* BKUP_BATT_STS */
+#define WM831X_BKUP_BATT_STS_SHIFT 10 /* BKUP_BATT_STS */
+#define WM831X_BKUP_BATT_STS_WIDTH 1 /* BKUP_BATT_STS */
+#define WM831X_BKUP_CHG_VLIM 0x0010 /* BKUP_CHG_VLIM */
+#define WM831X_BKUP_CHG_VLIM_MASK 0x0010 /* BKUP_CHG_VLIM */
+#define WM831X_BKUP_CHG_VLIM_SHIFT 4 /* BKUP_CHG_VLIM */
+#define WM831X_BKUP_CHG_VLIM_WIDTH 1 /* BKUP_CHG_VLIM */
+#define WM831X_BKUP_CHG_ILIM_MASK 0x0003 /* BKUP_CHG_ILIM - [1:0] */
+#define WM831X_BKUP_CHG_ILIM_SHIFT 0 /* BKUP_CHG_ILIM - [1:0] */
+#define WM831X_BKUP_CHG_ILIM_WIDTH 2 /* BKUP_CHG_ILIM - [1:0] */
+
+#endif
--
1.6.3.3

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