This adds battery/charge monitoring driver for spitz.
This is still not 100% done; spitz.c parts need small cleanups to fit
with the rest of code, and "limit" interface needs to be done.
Question is... who merges this when its done? Would it be ok to go
through PXA tree?
Signed-off-by: Pavel Machek <[email protected]>
diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index 01c5769..5bf7f0e 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -921,6 +921,15 @@ static inline void spitz_i2c_init(void) {}
#endif
/******************************************************************************
+ * Battery
+ ******************************************************************************/
+
+static struct platform_device spitz_battery_device = {
+ .name = "spitz-battery",
+ .id = -1,
+};
+
+/******************************************************************************
* Machine init
******************************************************************************/
static void spitz_poweroff(void)
@@ -968,6 +977,7 @@ static void __init spitz_init(void)
spitz_nor_init();
spitz_nand_init();
spitz_i2c_init();
+ platform_device_register(&spitz_battery_device);
}
static void __init spitz_fixup(struct machine_desc *desc,
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 52a462f..df54d70 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -102,6 +102,12 @@ config BATTERY_COLLIE
Say Y to enable support for the battery on the Sharp Zaurus
SL-5500 (collie) models.
+config BATTERY_SPITZ
+ tristate "Sharp SL-3000C (spitz) battery"
+ help
+ Say Y to enable support for the battery on the Sharp Zaurus
+ SL-3000C (spitz) models.
+
config BATTERY_WM97XX
bool "WM97xx generic battery driver"
depends on TOUCHSCREEN_WM97XX=y
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 8385bfa..7a82c1e 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o
obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o
obj-$(CONFIG_BATTERY_TOSA) += tosa_battery.o
obj-$(CONFIG_BATTERY_COLLIE) += collie_battery.o
+obj-$(CONFIG_BATTERY_SPITZ) += spitz_battery.o
obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o
obj-$(CONFIG_BATTERY_BQ20Z75) += bq20z75.o
obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o
diff --git a/drivers/power/spitz_battery.c b/drivers/power/spitz_battery.c
new file mode 100644
index 0000000..a612ff8
--- /dev/null
+++ b/drivers/power/spitz_battery.c
@@ -0,0 +1,318 @@
+/*
+ * Battery and Power Management code for the Sharp SL-3000c
+ *
+ * Copyright (c) 2009 Pavel Machek <[email protected]>
+ *
+ * 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/platform_device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/power_supply.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+
+#include <asm/mach-types.h>
+#include <mach/spitz.h>
+#include <mach/sharpsl_pm.h>
+
+extern struct sharpsl_pm_status sharpsl_pm;
+
+struct spitz_bat {
+ struct power_supply psy;
+
+ bool (*is_present)(struct spitz_bat *bat);
+};
+
+static struct spitz_bat spitz_bat_main, spitz_ac;
+
+extern int sharpsl_pm_pxa_read_max1111(int channel);
+
+
+static int spitz_bat_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ int ret = 0;
+ struct spitz_bat *bat = container_of(psy, struct spitz_bat, psy);
+
+ val->intval = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_HEALTH:
+ /* POWER_SUPPLY_HEALTH_OVERHEAT , POWER_SUPPLY_HEALTH_COLD,
+ POWER_SUPPLY_HEALTH_OVERVOLTAGE, POWER_SUPPLY_HEALTH_UNSPEC_FAILURE, POWER_SUPPLY_HEALTH_GOOD
+ */
+ return 0;
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
+ if (gpio_get_value(SPITZ_GPIO_CHRG_ON) == 0) {
+ if (gpio_get_value(SPITZ_GPIO_JK_B) == 1)
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
+ else
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+ }
+ return 0;
+ case POWER_SUPPLY_PROP_STATUS:
+ {
+ int status = 0;
+
+ if (gpio_get_value(SPITZ_GPIO_CHRG_ON) == 0)
+ printk("Chrg bit on. ");
+ if (gpio_get_value(SPITZ_GPIO_JK_B) == 0)
+ printk("Slow charge bit on. ");
+
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+
+ if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ else {
+ if (gpio_get_value(SPITZ_GPIO_CHRG_ON) == 0)
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL))
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ }
+
+ printk("ACIN: %d ", sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN));
+ printk("Chrgfull: %d ", sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL));
+ printk("Fatal: %d ", sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL));
+ printk("ACIN_volt: %d\n", sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT));
+
+ return 0;
+ }
+ case POWER_SUPPLY_PROP_TECHNOLOGY:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ /* Thanks to Stanislav B. ADC has 3.3V as reference,
+ is connected to battery over 47kOhm,
+ and to ground over 100kOhm. */
+ val->intval = (sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT) * 1470 * 3300)/256;
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ val->intval = 4200000;
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ val->intval = 3400000;
+ return 0;
+ case POWER_SUPPLY_PROP_TEMP:
+ mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
+ sharpsl_pm.machinfo->measure_temp(1);
+ mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
+ val->intval = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
+ sharpsl_pm.machinfo->measure_temp(0);
+ return 0;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = "spitz-battery";
+ return 0;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = 1;
+ return 0;
+ /* add these */
+ case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+ val->intval = 2000000;
+ return 0;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ val->intval = 42; //get_percentage( );
+ return 0;
+ default:
+ return -EINVAL;
+ }
+ return -EINVAL;
+}
+
+static int spitz_ac_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ int ret = 0;
+ struct spitz_bat *bat = container_of(psy, struct spitz_bat, psy);
+
+ val->intval = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ /* Thanks to Stanislav B. ADC has 3.3V as reference,
+ is connected to acin over 2kOhm,
+ and to ground over 1kOhm. */
+ val->intval = (sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT) * 3000 * 3300)/256;
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ val->intval = 5250000;
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ val->intval = 4750000;
+ return 0;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = "spitz-power-supply";
+ return 0;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
+ return 0;
+ default:
+ return -EINVAL;
+ }
+ return -EINVAL;
+}
+
+static void spitz_bat_external_power_changed(struct power_supply *psy)
+{
+}
+
+
+static enum power_supply_property spitz_bat_main_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+};
+
+static struct spitz_bat spitz_bat_main = {
+ .psy = {
+ .name = "main-battery",
+ .type = POWER_SUPPLY_TYPE_BATTERY,
+ .properties = spitz_bat_main_props,
+ .num_properties = ARRAY_SIZE(spitz_bat_main_props),
+ .get_property = spitz_bat_get_property,
+ .external_power_changed = spitz_bat_external_power_changed,
+ .use_for_apm = 1,
+ },
+};
+
+static enum power_supply_property spitz_ac_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+ POWER_SUPPLY_PROP_PRESENT,
+};
+
+static struct spitz_bat spitz_ac = {
+ .psy = {
+ .name = "ac",
+ .type = POWER_SUPPLY_TYPE_MAINS,
+ .properties = spitz_ac_props,
+ .num_properties = ARRAY_SIZE(spitz_ac_props),
+ .get_property = spitz_ac_get_property,
+ },
+};
+
+#ifdef CONFIG_PM
+static int spitz_bat_suspend(struct platform_device *dev, pm_message_t state)
+{
+ return 0;
+}
+
+static int spitz_bat_resume(struct platform_device *dev)
+{
+ return 0;
+}
+#else
+#define spitz_bat_suspend NULL
+#define spitz_bat_resume NULL
+#endif
+
+
+static ssize_t spitz_bat_limit_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ sprintf(buf, "Hello :-)");
+ return 9;
+}
+
+static ssize_t spitz_bat_limit_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ if (!strncmp(buf, "fastcharge", 10)) {
+ gpio_set_value(SPITZ_GPIO_JK_B, 1);
+ gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
+ return 10;
+ }
+ if (!strncmp(buf, "slowcharge", 10)) {
+ gpio_set_value(SPITZ_GPIO_JK_B, 0);
+ gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
+ return 10;
+ }
+ if (!strncmp(buf, "nonecharge", 10)) {
+ gpio_set_value(SPITZ_GPIO_JK_B, 0);
+ gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
+ return 10;
+ }
+ return -EINVAL;
+}
+
+static struct device_attribute spitz_limit_attr = {
+ .attr = { .name = "limit", .mode = 0644 },
+ .show = spitz_bat_limit_show,
+ .store = spitz_bat_limit_store,
+};
+
+static int __devinit spitz_bat_probe(struct platform_device *dev)
+{
+ int ret;
+ int i;
+
+ if (!machine_is_spitz())
+ return -ENODEV;
+
+ printk("spitz_bat_probe: register\n");
+ power_supply_register(&dev->dev, &spitz_bat_main.psy);
+ power_supply_register(&dev->dev, &spitz_ac.psy);
+ device_create_file(&dev->dev, &spitz_limit_attr);
+
+ return 0;
+}
+
+static int __devexit spitz_bat_remove(struct platform_device *dev)
+{
+ int i;
+
+ device_remove_file(&dev->dev, &spitz_limit_attr);
+ power_supply_unregister(&spitz_bat_main.psy);
+ power_supply_unregister(&spitz_ac.psy);
+ return 0;
+}
+
+
+static struct platform_driver spitz_bat_driver = {
+ .driver.name = "spitz-battery",
+ .driver.owner = THIS_MODULE,
+ .probe = spitz_bat_probe,
+ .remove = __devexit_p(spitz_bat_remove),
+ .suspend = spitz_bat_suspend,
+ .resume = spitz_bat_resume,
+};
+
+static int __init spitz_bat_init(void)
+{
+ return platform_driver_register(&spitz_bat_driver);
+}
+
+static void __exit spitz_bat_exit(void)
+{
+ platform_driver_unregister(&spitz_bat_driver);
+}
+
+module_init(spitz_bat_init);
+module_exit(spitz_bat_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Pavel Machek");
+MODULE_DESCRIPTION("Spitz battery driver");
+MODULE_ALIAS("platform:spitz-battery");
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
This adds battery/charge monitoring driver for spitz.
This is version I'd like to see merged.
Is it ok for Marek to merge this?
Signed-off-by: Pavel Machek <[email protected]>
diff --git a/arch/arm/mach-pxa/sharpsl_pm.c b/arch/arm/mach-pxa/sharpsl_pm.c
index 785880f..513588c 100644
--- a/arch/arm/mach-pxa/sharpsl_pm.c
+++ b/arch/arm/mach-pxa/sharpsl_pm.c
@@ -68,6 +51,7 @@ static void sharpsl_battery_thread(struct work_struct *private_);
* Variables
*/
struct sharpsl_pm_status sharpsl_pm;
+EXPORT_SYMBOL(sharpsl_pm);
static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index 01c5769..ddb1b24 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -920,6 +920,25 @@ static void __init spitz_i2c_init(void)
static inline void spitz_i2c_init(void) {}
#endif
+
+/******************************************************************************
+ * Battery
+ ******************************************************************************/
+
+#if defined(CONFIG_BATTERY_SPITZ) || defined(CONFIG_BATTERY_SPITZ_MODULE)
+static struct platform_device spitz_battery_device = {
+ .name = "spitz-battery",
+ .id = -1,
+};
+
+static void __init spitz_battery_init(void)
+{
+ platform_device_register(&spitz_battery_device);
+}
+#else
+static void __init spitz_battery_init(void) {}
+#endif
+
/******************************************************************************
* Machine init
******************************************************************************/
@@ -968,6 +987,7 @@ static void __init spitz_init(void)
spitz_nor_init();
spitz_nand_init();
spitz_i2c_init();
+ spitz_battery_init();
}
static void __init spitz_fixup(struct machine_desc *desc,
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 52a462f..df54d70 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -102,6 +102,12 @@ config BATTERY_COLLIE
Say Y to enable support for the battery on the Sharp Zaurus
SL-5500 (collie) models.
+config BATTERY_SPITZ
+ tristate "Sharp SL-3000C (spitz) battery"
+ help
+ Say Y to enable support for the battery on the Sharp Zaurus
+ SL-3000C (spitz) models.
+
config BATTERY_WM97XX
bool "WM97xx generic battery driver"
depends on TOUCHSCREEN_WM97XX=y
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 8385bfa..7a82c1e 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o
obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o
obj-$(CONFIG_BATTERY_TOSA) += tosa_battery.o
obj-$(CONFIG_BATTERY_COLLIE) += collie_battery.o
+obj-$(CONFIG_BATTERY_SPITZ) += spitz_battery.o
obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o
obj-$(CONFIG_BATTERY_BQ20Z75) += bq20z75.o
obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o
diff --git a/drivers/power/spitz_battery.c b/drivers/power/spitz_battery.c
new file mode 100644
index 0000000..5981f58
--- /dev/null
+++ b/drivers/power/spitz_battery.c
@@ -0,0 +1,355 @@
+/*
+ * Battery and Power Management code for the Sharp SL-3000c
+ *
+ * Copyright (c) 2009 Pavel Machek <[email protected]>
+ *
+ * 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/platform_device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/power_supply.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+
+#include <asm/mach-types.h>
+#include <mach/spitz.h>
+#include <mach/sharpsl_pm.h>
+
+extern struct sharpsl_pm_status sharpsl_pm;
+
+struct spitz_bat {
+ struct power_supply psy;
+
+ bool (*is_present)(struct spitz_bat *bat);
+};
+
+struct battery_thresh sharpsl_battery_levels[] = {
+ { 3980, 100 },
+ { 3900, 95 },
+ { 3860, 90 },
+ { 3800, 85 },
+ { 3760, 80 },
+ { 3720, 74 },
+ { 3680, 69 },
+ { 3620, 65 },
+ { 3570, 59 },
+ { 3560, 55 },
+ { 3550, 48 },
+ { 3530, 45 },
+ { 3510, 39 },
+ { 3490, 33 },
+ { 3470, 29 },
+ { 3450, 23 },
+ { 3410, 16 },
+ { 0, 0 },
+};
+
+static struct spitz_bat spitz_bat_main, spitz_ac;
+
+extern int sharpsl_pm_pxa_read_max1111(int channel);
+
+typedef int milliamp_t;
+typedef int milliohm_t;
+typedef int millivolt_t;
+typedef int microvolt_t;
+
+milliamp_t basic_current = 125;
+milliohm_t battery_resistance = 100;
+
+/* 422 seems to be suitable for very old, 1Ah battery.
+ 2Ah battery probably has better resistance */
+
+/* Unfortunately, resistance depends on state of charge, current
+ * direction and temperature.
+ *
+ * Ouch, and dependency is actually _not_ too simple. It is lowest
+ * at 3.55V, very slowly rises at 4V (approximately linear dependency),
+ * and quickly rises towards 3.2V (in something exponential-looking).
+ *
+ * It is about same at 25Celsius and 40Celsius, and about 2.5x the value
+ * on 0Celsius, rising _very_ sharply.
+ *
+ * Li-ion should only be charged between 0 and 45 Celsius, and discharged
+ * between -20 and 60 celsius.
+ */
+
+extern int backlight_current;
+
+/* Positive values: current drawn from battery */
+milliamp_t battery_current(void)
+{
+ int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
+
+ printk("bl_status: %d\n", bl_status);
+
+ if (sharpsl_pm.charge_mode == CHRG_ON)
+ return 0;
+
+ /* FIXME: take backlight into account */
+ return basic_current;
+}
+
+millivolt_t liion_internal_voltage(millivolt_t voltage, milliamp_t current_ma)
+{
+ return voltage + (battery_resistance * current_ma / 1000);
+}
+
+
+static microvolt_t get_battery(void)
+{
+ /* Thanks to Stanislav B. ADC has 3.3V as reference,
+ is connected to battery over 47kOhm,
+ and to ground over 100kOhm. */
+ int adc = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
+ return (adc * 1470 * 3300)/256;
+}
+
+static int get_percentage(void)
+{
+ int i = sharpsl_pm.machinfo->bat_levels - 1;
+ struct battery_thresh *thresh;
+ millivolt_t voltage = get_battery()/1000;
+
+ thresh = sharpsl_battery_levels;
+
+ while (i > 0 && (voltage > thresh[i].voltage))
+ i--;
+
+ return thresh[i].percentage;
+}
+
+static int get_status(union power_supply_propval *val)
+{
+ if (gpio_get_value(SPITZ_GPIO_CHRG_ON) == 0)
+ printk("Charge on. ");
+ if (gpio_get_value(SPITZ_GPIO_JK_B) == 0)
+ printk("Slow charge. ");
+
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+
+ if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ else {
+ if (gpio_get_value(SPITZ_GPIO_CHRG_ON) == 0)
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL))
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ }
+
+ printk("ACIN: %d ", !!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN));
+ printk("Full: %d ", !!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL));
+ printk("Fatal: %d ", !!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL));
+ printk("Percent: %d\n", get_percentage());
+
+ return 0;
+}
+
+static int spitz_bat_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ val->intval = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_HEALTH:
+ /* POWER_SUPPLY_HEALTH_OVERHEAT , POWER_SUPPLY_HEALTH_COLD,
+ POWER_SUPPLY_HEALTH_OVERVOLTAGE, POWER_SUPPLY_HEALTH_UNSPEC_FAILURE, POWER_SUPPLY_HEALTH_GOOD
+ */
+ return 0;
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
+ if (gpio_get_value(SPITZ_GPIO_CHRG_ON) == 0) {
+ if (gpio_get_value(SPITZ_GPIO_JK_B) == 1)
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
+ else
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+ }
+ return 0;
+ case POWER_SUPPLY_PROP_STATUS:
+ return get_status(val);
+ case POWER_SUPPLY_PROP_TECHNOLOGY:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ val->intval = get_battery();
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ val->intval = 4200000;
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ val->intval = 3400000;
+ return 0;
+ case POWER_SUPPLY_PROP_TEMP:
+ mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
+ sharpsl_pm.machinfo->measure_temp(1);
+ mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
+ val->intval = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
+ sharpsl_pm.machinfo->measure_temp(0);
+ return 0;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = "spitz-battery";
+ return 0;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = 1;
+ return 0;
+ case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+ val->intval = 2000000;
+ return 0;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ val->intval = get_percentage();
+ return 0;
+ default:
+ return -EINVAL;
+ }
+ return -EINVAL;
+}
+
+static int spitz_ac_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ val->intval = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ /* Thanks to Stanislav B. ADC has 3.3V as reference,
+ is connected to acin over 2kOhm,
+ and to ground over 1kOhm. */
+ val->intval = (sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT) * 3000 * 3300)/256;
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ val->intval = 5250000;
+ return 0;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ val->intval = 4750000;
+ return 0;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = "spitz-power-supply";
+ return 0;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
+ return 0;
+ default:
+ return -EINVAL;
+ }
+ return -EINVAL;
+}
+
+static void spitz_bat_external_power_changed(struct power_supply *psy)
+{
+}
+
+static enum power_supply_property spitz_bat_main_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+};
+
+static struct spitz_bat spitz_bat_main = {
+ .psy = {
+ .name = "main-battery",
+ .type = POWER_SUPPLY_TYPE_BATTERY,
+ .properties = spitz_bat_main_props,
+ .num_properties = ARRAY_SIZE(spitz_bat_main_props),
+ .get_property = spitz_bat_get_property,
+ .external_power_changed = spitz_bat_external_power_changed,
+ .use_for_apm = 1,
+ },
+};
+
+static enum power_supply_property spitz_ac_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+ POWER_SUPPLY_PROP_PRESENT,
+};
+
+static struct spitz_bat spitz_ac = {
+ .psy = {
+ .name = "ac",
+ .type = POWER_SUPPLY_TYPE_MAINS,
+ .properties = spitz_ac_props,
+ .num_properties = ARRAY_SIZE(spitz_ac_props),
+ .get_property = spitz_ac_get_property,
+ },
+};
+
+#ifdef CONFIG_PM
+static int spitz_bat_suspend(struct platform_device *dev, pm_message_t state)
+{
+ return 0;
+}
+
+static int spitz_bat_resume(struct platform_device *dev)
+{
+ return 0;
+}
+#else
+#define spitz_bat_suspend NULL
+#define spitz_bat_resume NULL
+#endif
+
+
+
+static int __devinit spitz_bat_probe(struct platform_device *dev)
+{
+ if (!machine_is_spitz())
+ return -ENODEV;
+
+ printk("spitz_bat_probe: register\n");
+ power_supply_register(&dev->dev, &spitz_bat_main.psy);
+ power_supply_register(&dev->dev, &spitz_ac.psy);
+ return 0;
+}
+
+static int __devexit spitz_bat_remove(struct platform_device *dev)
+{
+ power_supply_unregister(&spitz_bat_main.psy);
+ power_supply_unregister(&spitz_ac.psy);
+ return 0;
+}
+
+
+static struct platform_driver spitz_bat_driver = {
+ .driver.name = "spitz-battery",
+ .driver.owner = THIS_MODULE,
+ .probe = spitz_bat_probe,
+ .remove = __devexit_p(spitz_bat_remove),
+ .suspend = spitz_bat_suspend,
+ .resume = spitz_bat_resume,
+};
+
+static int __init spitz_bat_init(void)
+{
+ return platform_driver_register(&spitz_bat_driver);
+}
+
+static void __exit spitz_bat_exit(void)
+{
+ platform_driver_unregister(&spitz_bat_driver);
+}
+
+module_init(spitz_bat_init);
+module_exit(spitz_bat_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Pavel Machek");
+MODULE_DESCRIPTION("Spitz battery driver");
+MODULE_ALIAS("platform:spitz-battery");
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
On Saturday, May 21, 2011 07:01:29 PM Pavel Machek wrote:
> This adds battery/charge monitoring driver for spitz.
>
> This is version I'd like to see merged.
>
> Is it ok for Marek to merge this?
No, I believe Anton should merge this.
>
> Signed-off-by: Pavel Machek <[email protected]>
>
> diff --git a/arch/arm/mach-pxa/sharpsl_pm.c
> b/arch/arm/mach-pxa/sharpsl_pm.c index 785880f..513588c 100644
> --- a/arch/arm/mach-pxa/sharpsl_pm.c
> +++ b/arch/arm/mach-pxa/sharpsl_pm.c
> @@ -68,6 +51,7 @@ static void sharpsl_battery_thread(struct work_struct
> *private_); * Variables
> */
> struct sharpsl_pm_status sharpsl_pm;
> +EXPORT_SYMBOL(sharpsl_pm);
> static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
> static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
> DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
> diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
> index 01c5769..ddb1b24 100644
> --- a/arch/arm/mach-pxa/spitz.c
> +++ b/arch/arm/mach-pxa/spitz.c
> @@ -920,6 +920,25 @@ static void __init spitz_i2c_init(void)
> static inline void spitz_i2c_init(void) {}
> #endif
>
> +
> +/*************************************************************************
> ***** + * Battery
> +
> **************************************************************************
> ****/ +
> +#if defined(CONFIG_BATTERY_SPITZ) || defined(CONFIG_BATTERY_SPITZ_MODULE)
> +static struct platform_device spitz_battery_device = {
> + .name = "spitz-battery",
> + .id = -1,
> +};
> +
> +static void __init spitz_battery_init(void)
> +{
> + platform_device_register(&spitz_battery_device);
> +}
> +#else
> +static void __init spitz_battery_init(void) {}
> +#endif
> +
> /*************************************************************************
> ***** * Machine init
>
> **************************************************************************
> ****/ @@ -968,6 +987,7 @@ static void __init spitz_init(void)
> spitz_nor_init();
> spitz_nand_init();
> spitz_i2c_init();
> + spitz_battery_init();
> }
>
> static void __init spitz_fixup(struct machine_desc *desc,
> diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
> index 52a462f..df54d70 100644
> --- a/drivers/power/Kconfig
> +++ b/drivers/power/Kconfig
> @@ -102,6 +102,12 @@ config BATTERY_COLLIE
> Say Y to enable support for the battery on the Sharp Zaurus
> SL-5500 (collie) models.
>
> +config BATTERY_SPITZ
> + tristate "Sharp SL-3000C (spitz) battery"
> + help
> + Say Y to enable support for the battery on the Sharp Zaurus
> + SL-3000C (spitz) models.
> +
> config BATTERY_WM97XX
> bool "WM97xx generic battery driver"
> depends on TOUCHSCREEN_WM97XX=y
> diff --git a/drivers/power/Makefile b/drivers/power/Makefile
> index 8385bfa..7a82c1e 100644
> --- a/drivers/power/Makefile
> +++ b/drivers/power/Makefile
> @@ -20,6 +20,7 @@ obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o
> obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o
> obj-$(CONFIG_BATTERY_TOSA) += tosa_battery.o
> obj-$(CONFIG_BATTERY_COLLIE) += collie_battery.o
> +obj-$(CONFIG_BATTERY_SPITZ) += spitz_battery.o
> obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o
> obj-$(CONFIG_BATTERY_BQ20Z75) += bq20z75.o
> obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o
> diff --git a/drivers/power/spitz_battery.c b/drivers/power/spitz_battery.c
> new file mode 100644
> index 0000000..5981f58
> --- /dev/null
> +++ b/drivers/power/spitz_battery.c
> @@ -0,0 +1,355 @@
> +/*
> + * Battery and Power Management code for the Sharp SL-3000c
> + *
> + * Copyright (c) 2009 Pavel Machek <[email protected]>
> + *
> + * 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/platform_device.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/power_supply.h>
> +#include <linux/delay.h>
> +#include <linux/spinlock.h>
> +#include <linux/interrupt.h>
> +#include <linux/gpio.h>
> +
> +#include <asm/mach-types.h>
> +#include <mach/spitz.h>
> +#include <mach/sharpsl_pm.h>
> +
> +extern struct sharpsl_pm_status sharpsl_pm;
> +
> +struct spitz_bat {
> + struct power_supply psy;
> +
> + bool (*is_present)(struct spitz_bat *bat);
> +};
> +
> +struct battery_thresh sharpsl_battery_levels[] = {
> + { 3980, 100 },
> + { 3900, 95 },
> + { 3860, 90 },
> + { 3800, 85 },
> + { 3760, 80 },
> + { 3720, 74 },
> + { 3680, 69 },
> + { 3620, 65 },
> + { 3570, 59 },
> + { 3560, 55 },
> + { 3550, 48 },
> + { 3530, 45 },
> + { 3510, 39 },
> + { 3490, 33 },
> + { 3470, 29 },
> + { 3450, 23 },
> + { 3410, 16 },
> + { 0, 0 },
> +};
> +
> +static struct spitz_bat spitz_bat_main, spitz_ac;
> +
> +extern int sharpsl_pm_pxa_read_max1111(int channel);
> +
> +typedef int milliamp_t;
> +typedef int milliohm_t;
> +typedef int millivolt_t;
> +typedef int microvolt_t;
> +
> +milliamp_t basic_current = 125;
> +milliohm_t battery_resistance = 100;
> +
> +/* 422 seems to be suitable for very old, 1Ah battery.
> + 2Ah battery probably has better resistance */
> +
> +/* Unfortunately, resistance depends on state of charge, current
> + * direction and temperature.
> + *
> + * Ouch, and dependency is actually _not_ too simple. It is lowest
> + * at 3.55V, very slowly rises at 4V (approximately linear dependency),
> + * and quickly rises towards 3.2V (in something exponential-looking).
> + *
> + * It is about same at 25Celsius and 40Celsius, and about 2.5x the value
> + * on 0Celsius, rising _very_ sharply.
> + *
> + * Li-ion should only be charged between 0 and 45 Celsius, and discharged
> + * between -20 and 60 celsius.
> + */
> +
> +extern int backlight_current;
> +
> +/* Positive values: current drawn from battery */
> +milliamp_t battery_current(void)
> +{
> + int bl_status = sharpsl_pm.machinfo->backlight_get_status ?
> sharpsl_pm.machinfo->backlight_get_status() : 0; +
> + printk("bl_status: %d\n", bl_status);
This and other debuging printks should probably be handled somehow ... different
? Also, why not use dev_info() ?
> +
> + if (sharpsl_pm.charge_mode == CHRG_ON)
> + return 0;
> +
> + /* FIXME: take backlight into account */
> + return basic_current;
> +}
> +
> +millivolt_t liion_internal_voltage(millivolt_t voltage, milliamp_t
> current_ma) +{
> + return voltage + (battery_resistance * current_ma / 1000);
> +}
> +
> +
> +static microvolt_t get_battery(void)
> +{
> + /* Thanks to Stanislav B. ADC has 3.3V as reference,
> + is connected to battery over 47kOhm,
> + and to ground over 100kOhm. */
> + int adc = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
> + return (adc * 1470 * 3300)/256;
> +}
> +
> +static int get_percentage(void)
> +{
> + int i = sharpsl_pm.machinfo->bat_levels - 1;
> + struct battery_thresh *thresh;
> + millivolt_t voltage = get_battery()/1000;
> +
> + thresh = sharpsl_battery_levels;
> +
> + while (i > 0 && (voltage > thresh[i].voltage))
> + i--;
> +
> + return thresh[i].percentage;
> +}
> +
> +static int get_status(union power_supply_propval *val)
> +{
> + if (gpio_get_value(SPITZ_GPIO_CHRG_ON) == 0)
> + printk("Charge on. ");
> + if (gpio_get_value(SPITZ_GPIO_JK_B) == 0)
> + printk("Slow charge. ");
dev_info would be cool, though if this could be disabled, it'd be even cooler ;)
> +
> + val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
> +
> + if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))
> + val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
> + else {
> + if (gpio_get_value(SPITZ_GPIO_CHRG_ON) == 0)
> + val->intval = POWER_SUPPLY_STATUS_CHARGING;
> + if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL))
> + val->intval = POWER_SUPPLY_STATUS_FULL;
> + }
> +
> + printk("ACIN: %d ",
> !!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)); + printk("Full:
> %d ", !!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL));
> + printk("Fatal: %d ",
> !!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL));
> + printk("Percent: %d\n", get_percentage());
DITTO
> +
> + return 0;
> +}
> +
> +static int spitz_bat_get_property(struct power_supply *psy,
> + enum power_supply_property psp,
> + union power_supply_propval *val)
> +{
> + val->intval = 0;
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_HEALTH:
> + /* POWER_SUPPLY_HEALTH_OVERHEAT , POWER_SUPPLY_HEALTH_COLD,
> + POWER_SUPPLY_HEALTH_OVERVOLTAGE, POWER_SUPPLY_HEALTH_UNSPEC_FAILURE,
> POWER_SUPPLY_HEALTH_GOOD + */
This comment shouldn't be here.
> + return 0;
> + case POWER_SUPPLY_PROP_CHARGE_TYPE:
> + val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
> + if (gpio_get_value(SPITZ_GPIO_CHRG_ON) == 0) {
> + if (gpio_get_value(SPITZ_GPIO_JK_B) == 1)
> + val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
> + else
> + val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
> + }
> + return 0;
> + case POWER_SUPPLY_PROP_STATUS:
> + return get_status(val);
> + case POWER_SUPPLY_PROP_TECHNOLOGY:
> + val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
> + return 0;
> + case POWER_SUPPLY_PROP_VOLTAGE_NOW:
> + val->intval = get_battery();
> + return 0;
> + case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
> + val->intval = 4200000;
> + return 0;
> + case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
> + val->intval = 3400000;
> + return 0;
> + case POWER_SUPPLY_PROP_TEMP:
> + mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
> + sharpsl_pm.machinfo->measure_temp(1);
> + mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
> + val->intval = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
> + sharpsl_pm.machinfo->measure_temp(0);
> + return 0;
> + case POWER_SUPPLY_PROP_MODEL_NAME:
> + val->strval = "spitz-battery";
> + return 0;
> + case POWER_SUPPLY_PROP_PRESENT:
> + val->intval = 1;
> + return 0;
> + case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
> + val->intval = 2000000;
> + return 0;
> + case POWER_SUPPLY_PROP_CAPACITY:
> + val->intval = get_percentage();
> + return 0;
> + default:
> + return -EINVAL;
> + }
> + return -EINVAL;
> +}
> +
> +static int spitz_ac_get_property(struct power_supply *psy,
> + enum power_supply_property psp,
> + union power_supply_propval *val)
> +{
> + val->intval = 0;
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_STATUS:
> + val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
> + return 0;
> + case POWER_SUPPLY_PROP_VOLTAGE_NOW:
> + /* Thanks to Stanislav B. ADC has 3.3V as reference,
> + is connected to acin over 2kOhm,
> + and to ground over 1kOhm. */
> + val->intval = (sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT) *
> 3000 * 3300)/256; + return 0;
> + case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
> + val->intval = 5250000;
> + return 0;
> + case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
> + val->intval = 4750000;
> + return 0;
> + case POWER_SUPPLY_PROP_MODEL_NAME:
> + val->strval = "spitz-power-supply";
> + return 0;
> + case POWER_SUPPLY_PROP_PRESENT:
> + val->intval = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
> + return 0;
> + default:
> + return -EINVAL;
> + }
> + return -EINVAL;
> +}
> +
> +static void spitz_bat_external_power_changed(struct power_supply *psy)
> +{
> +}
> +
> +static enum power_supply_property spitz_bat_main_props[] = {
> + POWER_SUPPLY_PROP_STATUS,
> + POWER_SUPPLY_PROP_TECHNOLOGY,
> + POWER_SUPPLY_PROP_VOLTAGE_NOW,
> + POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
> + POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
> + POWER_SUPPLY_PROP_TEMP,
> + POWER_SUPPLY_PROP_PRESENT,
> + POWER_SUPPLY_PROP_CHARGE_TYPE,
> + POWER_SUPPLY_PROP_HEALTH,
> + POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
> +};
> +
> +static struct spitz_bat spitz_bat_main = {
> + .psy = {
> + .name = "main-battery",
> + .type = POWER_SUPPLY_TYPE_BATTERY,
> + .properties = spitz_bat_main_props,
> + .num_properties = ARRAY_SIZE(spitz_bat_main_props),
> + .get_property = spitz_bat_get_property,
> + .external_power_changed = spitz_bat_external_power_changed,
> + .use_for_apm = 1,
> + },
> +};
> +
> +static enum power_supply_property spitz_ac_props[] = {
> + POWER_SUPPLY_PROP_STATUS,
> + POWER_SUPPLY_PROP_VOLTAGE_NOW,
> + POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
> + POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
> + POWER_SUPPLY_PROP_PRESENT,
> +};
> +
> +static struct spitz_bat spitz_ac = {
> + .psy = {
> + .name = "ac",
> + .type = POWER_SUPPLY_TYPE_MAINS,
> + .properties = spitz_ac_props,
> + .num_properties = ARRAY_SIZE(spitz_ac_props),
> + .get_property = spitz_ac_get_property,
> + },
> +};
> +
> +#ifdef CONFIG_PM
> +static int spitz_bat_suspend(struct platform_device *dev, pm_message_t
> state) +{
> + return 0;
> +}
> +
> +static int spitz_bat_resume(struct platform_device *dev)
> +{
> + return 0;
> +}
> +#else
> +#define spitz_bat_suspend NULL
> +#define spitz_bat_resume NULL
> +#endif
> +
> +
> +
> +static int __devinit spitz_bat_probe(struct platform_device *dev)
> +{
> + if (!machine_is_spitz())
> + return -ENODEV;
> +
> + printk("spitz_bat_probe: register\n");
> + power_supply_register(&dev->dev, &spitz_bat_main.psy);
> + power_supply_register(&dev->dev, &spitz_ac.psy);
> + return 0;
> +}
> +
> +static int __devexit spitz_bat_remove(struct platform_device *dev)
> +{
> + power_supply_unregister(&spitz_bat_main.psy);
> + power_supply_unregister(&spitz_ac.psy);
> + return 0;
> +}
> +
> +
> +static struct platform_driver spitz_bat_driver = {
> + .driver.name = "spitz-battery",
> + .driver.owner = THIS_MODULE,
> + .probe = spitz_bat_probe,
> + .remove = __devexit_p(spitz_bat_remove),
> + .suspend = spitz_bat_suspend,
> + .resume = spitz_bat_resume,
> +};
> +
> +static int __init spitz_bat_init(void)
> +{
> + return platform_driver_register(&spitz_bat_driver);
> +}
> +
> +static void __exit spitz_bat_exit(void)
> +{
> + platform_driver_unregister(&spitz_bat_driver);
> +}
> +
> +module_init(spitz_bat_init);
> +module_exit(spitz_bat_exit);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_AUTHOR("Pavel Machek");
> +MODULE_DESCRIPTION("Spitz battery driver");
> +MODULE_ALIAS("platform:spitz-battery");
Cheers ;)