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Diffstat (limited to 'target/linux/xburst/patches-2.6.34/100-battery.patch')
-rw-r--r--target/linux/xburst/patches-2.6.34/100-battery.patch441
1 files changed, 441 insertions, 0 deletions
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 <lars@metafoo.de>
+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 <kzjeef@gmail.com>
++ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
++ *
++ * based on tosa_battery.c
++ *
++ * Copyright (C) 2008 Marek Vasut <marek.vasut@gmail.com>
++*
++ * 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/interrupt.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/slab.h>
++#include <linux/spinlock.h>
++
++#include <linux/delay.h>
++#include <linux/gpio.h>
++#include <linux/power_supply.h>
++
++#include <linux/power/jz4740-battery.h>
++#include <linux/jz4740-adc.h>
++
++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 <kzjeef@gmail.com>");
++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 <kzjeef@gmail.com>
++ *
++ * 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
+
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