[BATTERY] Apple PMU driver

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Anton Vorontsov <cbou@mail.ru>

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 9214562..051724f 100644 (file)
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -35,4 +35,11 @@ config BATTERY_DS2760
        help
          Say Y here to enable support for batteries with ds2760 chip.
 
+config BATTERY_PMU
+       tristate "Apple PMU battery"
+       depends on ADB_PMU
+       help
+         Say Y here to expose battery information on Apple machines
+         through the generic battery class.
+
 endif # POWER_SUPPLY

diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index a978ba1..a072b04 100644 (file)
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -18,3 +18,4 @@ obj-$(CONFIG_PDA_POWER)               += pda_power.o
 obj-$(CONFIG_APM_POWER)                += apm_power.o
 
 obj-$(CONFIG_BATTERY_DS2760)   += ds2760_battery.o
+obj-$(CONFIG_BATTERY_PMU)      += pmu_battery.o

diff --git a/drivers/power/pmu_battery.c b/drivers/power/pmu_battery.c
new file mode 100644 (file)
index 0000000..2fea4af
--- /dev/null
+++ b/drivers/power/pmu_battery.c
@@ -0,0 +1,215 @@
+/*
+ * Battery class driver for Apple PMU
+ *
+ *     Copyright © 2006  David Woodhouse <dwmw2@infradead.org>
+ *
+ * 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/platform_device.h>
+#include <linux/err.h>
+#include <linux/power_supply.h>
+#include <linux/adb.h>
+#include <linux/pmu.h>
+
+static struct pmu_battery_dev {
+       struct power_supply bat;
+       struct pmu_battery_info *pbi;
+       char name[16];
+       int propval;
+} *pbats[PMU_MAX_BATTERIES];
+
+#define to_pmu_battery_dev(x) container_of(x, struct pmu_battery_dev, bat)
+
+/*********************************************************************
+ *             Power
+ *********************************************************************/
+
+static int pmu_get_ac_prop(struct power_supply *psy,
+                          enum power_supply_property psp,
+                          union power_supply_propval *val)
+{
+       switch (psp) {
+       case POWER_SUPPLY_PROP_ONLINE:
+               val->intval = (!!(pmu_power_flags & PMU_PWR_AC_PRESENT)) ||
+                             (pmu_battery_count == 0);
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+static enum power_supply_property pmu_ac_props[] = {
+       POWER_SUPPLY_PROP_ONLINE,
+};
+
+static struct power_supply pmu_ac = {
+       .name = "pmu-ac",
+       .type = POWER_SUPPLY_TYPE_MAINS,
+       .properties = pmu_ac_props,
+       .num_properties = ARRAY_SIZE(pmu_ac_props),
+       .get_property = pmu_get_ac_prop,
+};
+
+/*********************************************************************
+ *             Battery properties
+ *********************************************************************/
+
+static char *pmu_batt_types[] = {
+       "Smart", "Comet", "Hooper", "Unknown"
+};
+
+static char *pmu_bat_get_model_name(struct pmu_battery_info *pbi)
+{
+       switch (pbi->flags & PMU_BATT_TYPE_MASK) {
+       case PMU_BATT_TYPE_SMART:
+               return pmu_batt_types[0];
+       case PMU_BATT_TYPE_COMET:
+               return pmu_batt_types[1];
+       case PMU_BATT_TYPE_HOOPER:
+               return pmu_batt_types[2];
+       default: break;
+       }
+       return pmu_batt_types[3];
+}
+
+static int pmu_bat_get_property(struct power_supply *psy,
+                               enum power_supply_property psp,
+                               union power_supply_propval *val)
+{
+       struct pmu_battery_dev *pbat = to_pmu_battery_dev(psy);
+       struct pmu_battery_info *pbi = pbat->pbi;
+
+       switch (psp) {
+       case POWER_SUPPLY_PROP_STATUS:
+               if (pbi->flags & PMU_BATT_CHARGING)
+                       val->intval = POWER_SUPPLY_STATUS_CHARGING;
+               else
+                       val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+               break;
+       case POWER_SUPPLY_PROP_PRESENT:
+               val->intval = !!(pbi->flags & PMU_BATT_PRESENT);
+               break;
+       case POWER_SUPPLY_PROP_MODEL_NAME:
+               val->strval = pmu_bat_get_model_name(pbi);
+               break;
+       case POWER_SUPPLY_PROP_ENERGY_AVG:
+               val->intval = pbi->charge     * 1000; /* mWh -> µWh */
+               break;
+       case POWER_SUPPLY_PROP_ENERGY_FULL:
+               val->intval = pbi->max_charge * 1000; /* mWh -> µWh */
+               break;
+       case POWER_SUPPLY_PROP_CURRENT_AVG:
+               val->intval = pbi->amperage   * 1000; /* mA -> µA */
+               break;
+       case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+               val->intval = pbi->voltage    * 1000; /* mV -> µV */
+               break;
+       case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
+               val->intval = pbi->time_remaining;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+static enum power_supply_property pmu_bat_props[] = {
+       POWER_SUPPLY_PROP_STATUS,
+       POWER_SUPPLY_PROP_PRESENT,
+       POWER_SUPPLY_PROP_MODEL_NAME,
+       POWER_SUPPLY_PROP_ENERGY_AVG,
+       POWER_SUPPLY_PROP_ENERGY_FULL,
+       POWER_SUPPLY_PROP_CURRENT_AVG,
+       POWER_SUPPLY_PROP_VOLTAGE_AVG,
+       POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
+};
+
+/*********************************************************************
+ *             Initialisation
+ *********************************************************************/
+
+static struct platform_device *bat_pdev;
+
+static int __init pmu_bat_init(void)
+{
+       int ret;
+       int i;
+
+       bat_pdev = platform_device_register_simple("pmu-battery",
+                                                  0, NULL, 0);
+       if (IS_ERR(bat_pdev)) {
+               ret = PTR_ERR(bat_pdev);
+               goto pdev_register_failed;
+       }
+
+       ret = power_supply_register(&bat_pdev->dev, &pmu_ac);
+       if (ret)
+               goto ac_register_failed;
+
+       for (i = 0; i < pmu_battery_count; i++) {
+               struct pmu_battery_dev *pbat = kzalloc(sizeof(*pbat),
+                                                      GFP_KERNEL);
+               if (!pbat)
+                       break;
+
+               sprintf(pbat->name, "PMU battery %d", i);
+               pbat->bat.name = pbat->name;
+               pbat->bat.properties = pmu_bat_props;
+               pbat->bat.num_properties = ARRAY_SIZE(pmu_bat_props);
+               pbat->bat.get_property = pmu_bat_get_property;
+               pbat->pbi = &pmu_batteries[i];
+
+               ret = power_supply_register(&bat_pdev->dev, &pbat->bat);
+               if (ret) {
+                       kfree(pbat);
+                       goto battery_register_failed;
+               }
+               pbats[i] = pbat;
+       }
+
+       goto success;
+
+battery_register_failed:
+       while (i--) {
+               if (!pbats[i])
+                       continue;
+               power_supply_unregister(&pbats[i]->bat);
+               kfree(pbats[i]);
+       }
+       power_supply_unregister(&pmu_ac);
+ac_register_failed:
+       platform_device_unregister(bat_pdev);
+pdev_register_failed:
+success:
+       return ret;
+}
+
+static void __exit pmu_bat_exit(void)
+{
+       int i;
+
+       for (i = 0; i < PMU_MAX_BATTERIES; i++) {
+               if (!pbats[i])
+                       continue;
+               power_supply_unregister(&pbats[i]->bat);
+               kfree(pbats[i]);
+       }
+       power_supply_unregister(&pmu_ac);
+       platform_device_unregister(bat_pdev);
+
+       return;
+}
+
+module_init(pmu_bat_init);
+module_exit(pmu_bat_exit);
+
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("PMU battery driver");