From 946c8fa59adb937542c1b193d4226388f2cd9659 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Wed, 12 May 2010 23:12:41 +0000 Subject: Add 2.6.34 patches SVN-Revision: 21438 --- .../linux/xburst/patches-2.6.34/100-battery.patch | 441 +++++++++++++++++++++ 1 file changed, 441 insertions(+) create mode 100644 target/linux/xburst/patches-2.6.34/100-battery.patch (limited to 'target/linux/xburst/patches-2.6.34/100-battery.patch') diff --git a/target/linux/xburst/patches-2.6.34/100-battery.patch b/target/linux/xburst/patches-2.6.34/100-battery.patch new file mode 100644 index 0000000000..3e6a6b959a --- /dev/null +++ b/target/linux/xburst/patches-2.6.34/100-battery.patch @@ -0,0 +1,441 @@ +From 83f97dcbcc93584a7d7930b6fe06562691bd865a Mon Sep 17 00:00:00 2001 +From: Lars-Peter Clausen +Date: Sat, 24 Apr 2010 12:28:54 +0200 +Subject: [PATCH] Add jz4740 battery driver + +--- + drivers/power/Kconfig | 11 + + drivers/power/Makefile | 1 + + drivers/power/jz4740-battery.c | 359 ++++++++++++++++++++++++++++++++++ + include/linux/power/jz4740-battery.h | 24 +++ + 4 files changed, 395 insertions(+), 0 deletions(-) + create mode 100644 drivers/power/jz4740-battery.c + create mode 100644 include/linux/power/jz4740-battery.h + +diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig +index faaa9b4..2f4e51f 100644 +--- a/drivers/power/Kconfig ++++ b/drivers/power/Kconfig +@@ -131,4 +131,15 @@ config CHARGER_PCF50633 + help + Say Y to include support for NXP PCF50633 Main Battery Charger. + ++config BATTERY_JZ4740 ++ tristate "Ingenic JZ4720/JZ4740 battery" ++ depends on SOC_JZ4740 ++ depends on JZ4740_ADC ++ help ++ Say Y to enable support for the battery on Ingenic JZ4720/JZ4740 based ++ boards. ++ ++ This driver can be build as a module. If so, the module will be ++ called jz4740-battery. ++ + endif # POWER_SUPPLY +diff --git a/drivers/power/Makefile b/drivers/power/Makefile +index a2ba7c8..3b6b971 100644 +--- a/drivers/power/Makefile ++++ b/drivers/power/Makefile +@@ -32,3 +32,4 @@ obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o + obj-$(CONFIG_BATTERY_DA9030) += da9030_battery.o + obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o + obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o ++obj-$(CONFIG_BATTERY_JZ4740) += jz4740-battery.o +diff --git a/drivers/power/jz4740-battery.c b/drivers/power/jz4740-battery.c +new file mode 100644 +index 0000000..c89b9f7 +--- /dev/null ++++ b/drivers/power/jz4740-battery.c +@@ -0,0 +1,359 @@ ++/* ++ * Battery measurement code for Ingenic JZ SOC. ++ * ++ * Copyright (C) 2009 Jiejing Zhang ++ * Copyright (C) 2010, Lars-Peter Clausen ++ * ++ * based on tosa_battery.c ++ * ++ * Copyright (C) 2008 Marek Vasut ++* ++ * 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 ++#include ++#include ++#include ++#include ++#include ++ ++#include ++#include ++#include ++ ++#include ++#include ++ ++struct jz_battery { ++ struct jz_battery_platform_data *pdata; ++ ++ int charge_irq; ++ ++ int status; ++ long voltage; ++ ++ struct power_supply battery; ++ struct delayed_work work; ++}; ++ ++static inline struct jz_battery *psy_to_jz_battery(struct power_supply *psy) ++{ ++ return container_of(psy, struct jz_battery, battery); ++} ++ ++static long jz_battery_read_voltage(struct jz_battery *jz_battery) ++{ ++ struct device *adc = jz_battery->battery.dev->parent->parent; ++ enum jz_adc_battery_scale scale; ++ ++ if (jz_battery->pdata->info.voltage_max_design > 2500000) ++ scale = JZ_ADC_BATTERY_SCALE_7V5; ++ else ++ scale = JZ_ADC_BATTERY_SCALE_2V5; ++ ++ return jz4740_adc_read_battery_voltage(adc, scale); ++} ++ ++static int jz_battery_get_capacity(struct power_supply *psy) ++{ ++ struct jz_battery *jz_battery = psy_to_jz_battery(psy); ++ struct power_supply_info *info = &jz_battery->pdata->info; ++ long voltage; ++ int ret; ++ int voltage_span; ++ ++ voltage = jz_battery_read_voltage(jz_battery); ++ ++ if (voltage < 0) ++ return voltage; ++ ++ voltage_span = info->voltage_max_design - info->voltage_min_design; ++ ret = ((voltage - info->voltage_min_design) * 100) / voltage_span; ++ ++ if (ret > 100) ++ ret = 100; ++ else if (ret < 0) ++ ret = 0; ++ ++ return ret; ++} ++ ++static int jz_battery_get_property(struct power_supply *psy, ++ enum power_supply_property psp, ++ union power_supply_propval *val) ++{ ++ struct jz_battery *jz_battery = psy_to_jz_battery(psy); ++ struct power_supply_info *info = &jz_battery->pdata->info; ++ long voltage; ++ ++ switch (psp) { ++ case POWER_SUPPLY_PROP_STATUS: ++ val->intval = jz_battery->status; ++ break; ++ case POWER_SUPPLY_PROP_TECHNOLOGY: ++ val->intval = jz_battery->pdata->info.technology; ++ break; ++ case POWER_SUPPLY_PROP_HEALTH: ++ voltage = jz_battery_read_voltage(jz_battery); ++ if (voltage < info->voltage_min_design) ++ val->intval = POWER_SUPPLY_HEALTH_DEAD; ++ else ++ val->intval = POWER_SUPPLY_HEALTH_GOOD; ++ break; ++ case POWER_SUPPLY_PROP_CAPACITY: ++ val->intval = jz_battery_get_capacity(psy); ++ break; ++ case POWER_SUPPLY_PROP_VOLTAGE_NOW: ++ val->intval = jz_battery_read_voltage(jz_battery); ++ if (val->intval < 0) ++ return val->intval; ++ break; ++ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: ++ val->intval = info->voltage_max_design; ++ break; ++ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: ++ val->intval = info->voltage_min_design; ++ break; ++ case POWER_SUPPLY_PROP_PRESENT: ++ val->intval = 1; ++ break; ++ default: ++ return -EINVAL; ++ } ++ return 0; ++} ++ ++static void jz_battery_external_power_changed(struct power_supply *psy) ++{ ++ struct jz_battery *jz_battery = psy_to_jz_battery(psy); ++ ++ cancel_delayed_work(&jz_battery->work); ++ schedule_delayed_work(&jz_battery->work, 0); ++} ++ ++static irqreturn_t jz_battery_charge_irq(int irq, void *data) ++{ ++ struct jz_battery *jz_battery = data; ++ ++ cancel_delayed_work(&jz_battery->work); ++ schedule_delayed_work(&jz_battery->work, 0); ++ ++ return IRQ_HANDLED; ++} ++ ++static void jz_battery_update(struct jz_battery *jz_battery) ++{ ++ int status; ++ long voltage; ++ long voltage_difference; ++ bool has_changed = 0; ++ ++ if (gpio_is_valid(jz_battery->pdata->gpio_charge)) { ++ int is_charging; ++ ++ is_charging = gpio_get_value(jz_battery->pdata->gpio_charge); ++ is_charging ^= jz_battery->pdata->gpio_charge_active_low; ++ if (is_charging) ++ status = POWER_SUPPLY_STATUS_CHARGING; ++ else ++ status = POWER_SUPPLY_STATUS_NOT_CHARGING; ++ ++ if (status != jz_battery->status) { ++ jz_battery->status = status; ++ has_changed = 1; ++ } ++ } ++ ++ voltage = jz_battery_read_voltage(jz_battery); ++ voltage_difference = voltage - jz_battery->voltage; ++ if (voltage_difference > 50000 || voltage_difference < 50000) { ++ jz_battery->voltage = voltage; ++ has_changed = 1; ++ } ++ if (has_changed) ++ power_supply_changed(&jz_battery->battery); ++} ++ ++static enum power_supply_property jz_battery_properties[] = { ++ POWER_SUPPLY_PROP_STATUS, ++ POWER_SUPPLY_PROP_TECHNOLOGY, ++ POWER_SUPPLY_PROP_HEALTH, ++ POWER_SUPPLY_PROP_CAPACITY, ++ POWER_SUPPLY_PROP_VOLTAGE_NOW, ++ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, ++ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, ++ POWER_SUPPLY_PROP_PRESENT, ++}; ++ ++static void jz_battery_work(struct work_struct *work) ++{ ++ /* Too small interval will increase system workload */ ++ const int interval = HZ * 30; ++ struct jz_battery *jz_battery = container_of(work, struct jz_battery, ++ work.work); ++ ++ jz_battery_update(jz_battery); ++ schedule_delayed_work(&jz_battery->work, interval); ++} ++ ++static int __devinit jz_battery_probe(struct platform_device *pdev) ++{ ++ int ret = 0; ++ struct jz_battery_platform_data *pdata = pdev->dev.platform_data; ++ struct jz_battery *jz_battery; ++ struct power_supply *battery; ++ ++ if (!pdev->dev.platform_data) { ++ dev_err(&pdev->dev, "No platform data\n"); ++ return -EINVAL; ++ } ++ ++ jz_battery = kzalloc(sizeof(*jz_battery), GFP_KERNEL); ++ ++ if (!jz_battery) { ++ dev_err(&pdev->dev, "Failed to allocate driver structure\n"); ++ return -ENOMEM; ++ } ++ ++ battery = &jz_battery->battery; ++ battery->name = pdata->info.name; ++ battery->type = POWER_SUPPLY_TYPE_BATTERY; ++ battery->properties = jz_battery_properties; ++ battery->num_properties = ARRAY_SIZE(jz_battery_properties); ++ battery->get_property = jz_battery_get_property; ++ battery->external_power_changed = jz_battery_external_power_changed; ++ battery->use_for_apm = 1; ++ ++ jz_battery->pdata = pdata; ++ ++ INIT_DELAYED_WORK(&jz_battery->work, jz_battery_work); ++ ++ if (gpio_is_valid(pdata->gpio_charge)) { ++ ret = gpio_request(pdata->gpio_charge, dev_name(&pdev->dev)); ++ if (ret) { ++ dev_err(&pdev->dev, "charger state gpio request failed.\n"); ++ goto err_free; ++ } ++ ret = gpio_direction_input(pdata->gpio_charge); ++ if (ret) { ++ dev_err(&pdev->dev, "charger state gpio set direction failed.\n"); ++ goto err_free_gpio; ++ } ++ ++ jz_battery->charge_irq = gpio_to_irq(pdata->gpio_charge); ++ ++ if (jz_battery->charge_irq >= 0) { ++ ret = request_irq(jz_battery->charge_irq, ++ jz_battery_charge_irq, ++ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, ++ dev_name(&pdev->dev), jz_battery); ++ if (ret) { ++ dev_err(&pdev->dev, "Failed to request charge irq: %d\n", ret); ++ goto err_free_gpio; ++ } ++ } ++ } else { ++ jz_battery->charge_irq = -1; ++ } ++ ++ ++ ret = power_supply_register(&pdev->dev, &jz_battery->battery); ++ if (ret) { ++ dev_err(&pdev->dev, "power supply battery register failed.\n"); ++ goto err_free_irq; ++ } ++ ++ platform_set_drvdata(pdev, jz_battery); ++ schedule_delayed_work(&jz_battery->work, 0); ++ ++ return 0; ++ ++err_free_irq: ++ if (jz_battery->charge_irq >= 0) ++ free_irq(jz_battery->charge_irq, jz_battery); ++err_free_gpio: ++ if (gpio_is_valid(pdata->gpio_charge)) ++ gpio_free(jz_battery->pdata->gpio_charge); ++err_free: ++ kfree(jz_battery); ++ return ret; ++} ++ ++static int __devexit jz_battery_remove(struct platform_device *pdev) ++{ ++ struct jz_battery *jz_battery = platform_get_drvdata(pdev); ++ ++ cancel_delayed_work_sync(&jz_battery->work); ++ ++ if (gpio_is_valid(jz_battery->pdata->gpio_charge)) { ++ if (jz_battery->charge_irq >= 0) ++ free_irq(jz_battery->charge_irq, jz_battery); ++ gpio_free(jz_battery->pdata->gpio_charge); ++ } ++ ++ power_supply_unregister(&jz_battery->battery); ++ ++ return 0; ++} ++ ++#ifdef CONFIG_PM ++static int jz_battery_suspend(struct device *dev) ++{ ++ struct jz_battery *jz_battery = dev_get_drvdata(dev); ++ ++ cancel_delayed_work_sync(&jz_battery->work); ++ jz_battery->status = POWER_SUPPLY_STATUS_UNKNOWN; ++ ++ return 0; ++} ++ ++static int jz_battery_resume(struct device *dev) ++{ ++ struct jz_battery *jz_battery = dev_get_drvdata(dev); ++ ++ schedule_delayed_work(&jz_battery->work, 0); ++ ++ return 0; ++} ++ ++static const struct dev_pm_ops jz_battery_pm_ops = { ++ .suspend = jz_battery_suspend, ++ .resume = jz_battery_resume, ++}; ++ ++#define JZ_BATTERY_PM_OPS (&jz_battery_pm_ops) ++ ++#else ++#define JZ_BATTERY_PM_OPS NULL ++#endif ++ ++static struct platform_driver jz_battery_driver = { ++ .probe = jz_battery_probe, ++ .remove = __devexit_p(jz_battery_remove), ++ .driver = { ++ .name = "jz4740-battery", ++ .owner = THIS_MODULE, ++ .pm = JZ_BATTERY_PM_OPS, ++ }, ++}; ++ ++static int __init jz_battery_init(void) ++{ ++ return platform_driver_register(&jz_battery_driver); ++} ++module_init(jz_battery_init); ++ ++static void __exit jz_battery_exit(void) ++{ ++ platform_driver_unregister(&jz_battery_driver); ++} ++module_exit(jz_battery_exit); ++ ++MODULE_ALIAS("platform:jz4740-battery"); ++MODULE_LICENSE("GPL"); ++MODULE_AUTHOR("Jiejing Zhang "); ++MODULE_DESCRIPTION("JZ4720/JZ4740 SoC battery driver"); +diff --git a/include/linux/power/jz4740-battery.h b/include/linux/power/jz4740-battery.h +new file mode 100644 +index 0000000..19c9610 +--- /dev/null ++++ b/include/linux/power/jz4740-battery.h +@@ -0,0 +1,24 @@ ++/* ++ * Copyright (C) 2009, Jiejing Zhang ++ * ++ * 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. ++ * ++ * You should have received a copy of the GNU General Public License along ++ * with this program; if not, write to the Free Software Foundation, Inc., ++ * 675 Mass Ave, Cambridge, MA 02139, USA. ++ * ++ */ ++ ++#ifndef __JZ4740_BATTERY_H ++#define __JZ4740_BATTERY_H ++ ++struct jz_battery_platform_data { ++ struct power_supply_info info; ++ int gpio_charge; /* GPIO port of Charger state */ ++ int gpio_charge_active_low; ++}; ++ ++#endif +-- +1.5.6.5 + -- cgit v1.2.3