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 <pa...@ucw.cz>
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 <pa...@ucw.cz> + * + * 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 _______________________________________________ Zaurus-devel mailing list Zaurus-devel@lists.linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/zaurus-devel