--- /dev/null
+From 40d5d4e980e0d4a5d00759f7fa2a18488f95a0ef Mon Sep 17 00:00:00 2001
+From: mokopatches <mokopatches@openmoko.org>
+Date: Sun, 13 Apr 2008 07:23:52 +0100
+Subject: [PATCH] bq27000-battery-driver.patch
+
+---
+ arch/arm/mach-s3c2440/Kconfig | 2 +
+ arch/arm/mach-s3c2440/mach-gta02.c | 21 ++
+ drivers/power/Kconfig | 7 +-
+ drivers/power/Makefile | 1 +
+ drivers/power/bq27000_battery.c | 375 ++++++++++++++++++++++++++++++++++++
+ include/linux/bq27000_battery.h | 12 ++
+ 6 files changed, 417 insertions(+), 1 deletions(-)
+ create mode 100644 drivers/power/bq27000_battery.c
+ create mode 100644 include/linux/bq27000_battery.h
+
+diff --git a/arch/arm/mach-s3c2440/Kconfig b/arch/arm/mach-s3c2440/Kconfig
+index f7bea5d..71719ac 100644
+--- a/arch/arm/mach-s3c2440/Kconfig
++++ b/arch/arm/mach-s3c2440/Kconfig
+@@ -85,6 +85,8 @@ config MACH_NEO1973_GTA02
+ bool "FIC Neo1973 GSM Phone (GTA02 Hardware)"
+ select CPU_S3C2442
+ select SENSORS_PCF50633
++ select POWER_SUPPLY
++ select GTA02_HDQ
+ help
+ Say Y here if you are using the FIC Neo1973 GSM Phone
+
+diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
+index cea76e7..3816ea5 100644
+--- a/arch/arm/mach-s3c2440/mach-gta02.c
++++ b/arch/arm/mach-s3c2440/mach-gta02.c
+@@ -81,6 +81,8 @@
+
+ #include <asm/arch/fiq_ipc_gta02.h>
+ #include "fiq_c_isr.h"
++#include <linux/gta02_hdq.h>
++#include <linux/bq27000_battery.h>
+
+ /* arbitrates which sensor IRQ owns the shared SPI bus */
+ static spinlock_t motion_irq_lock;
+@@ -583,6 +585,24 @@ struct platform_device gta02_hdq_device = {
+ };
+ #endif
+
++/* BQ27000 Battery */
++
++struct bq27000_platform_data bq27000_pdata = {
++ .name = "bat",
++ .rsense_mohms = 20,
++ .hdq_read = gta02hdq_read,
++ .hdq_write = gta02hdq_write,
++ .hdq_initialized = gta02hdq_initialized,
++};
++
++struct platform_device bq27000_battery_device = {
++ .name = "bq27000-battery",
++ .dev = {
++ .platform_data = &bq27000_pdata,
++ },
++};
++
++
+ /* NOR Flash */
+
+ #define GTA02_FLASH_BASE 0x18000000 /* GCS3 */
+@@ -1271,6 +1291,7 @@ static void __init gta02_machine_init(void)
+ case GTA02v5_SYSTEM_REV:
+ case GTA02v6_SYSTEM_REV:
+ platform_device_register(>a02_hdq_device);
++ platform_device_register(&bq27000_battery_device);
+ break;
+ default:
+ break;
+diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
+index 0a4515d..feb8b0a 100644
+--- a/drivers/power/Kconfig
++++ b/drivers/power/Kconfig
+@@ -49,7 +49,10 @@ config BATTERY_OLPC
+ help
+ Say Y to enable support for the battery on the OLPC laptop.
+
+-endif # POWER_SUPPLY
++config BATTERY_BQ27000_HDQ
++ tristate "BQ27000 HDQ battery monitor driver"
++ help
++ Say Y to enable support for the battery on the Neo Freerunner
+
+ config GTA02_HDQ
+ tristate "Neo Freerunner HDQ"
+@@ -58,3 +61,5 @@ config GTA02_HDQ
+ Say Y to enable support for communicating with an HDQ battery
+ on the Neo Freerunner. You probably want to select
+ at least BATTERY_BQ27000_HDQ as well
++
++endif # POWER_SUPPLY
+diff --git a/drivers/power/Makefile b/drivers/power/Makefile
+index 88f227f..d7e87ad 100644
+--- a/drivers/power/Makefile
++++ b/drivers/power/Makefile
+@@ -20,5 +20,6 @@ obj-$(CONFIG_APM_POWER) += apm_power.o
+ obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
+ obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o
+ obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o
++obj-$(CONFIG_BATTERY_BQ27000_HDQ) += bq27000_battery.o
+
+ obj-$(CONFIG_GTA02_HDQ) += gta02_hdq.o
+diff --git a/drivers/power/bq27000_battery.c b/drivers/power/bq27000_battery.c
+new file mode 100644
+index 0000000..d19186a
+--- /dev/null
++++ b/drivers/power/bq27000_battery.c
+@@ -0,0 +1,375 @@
++/*
++ * Driver for batteries with bq27000 chips inside via HDQ
++ *
++ * Copyright 2008 Openmoko, Inc
++ * Andy Green <andy@openmoko.com>
++ *
++ * based on ds2760 driver, original copyright notice for that --->
++ *
++ * Copyright © 2007 Anton Vorontsov
++ * 2004-2007 Matt Reimer
++ * 2004 Szabolcs Gyurko
++ *
++ * Use consistent with the GNU GPL is permitted,
++ * provided that this copyright notice is
++ * preserved in its entirety in all copies and derived works.
++ *
++ * Author: Anton Vorontsov <cbou@mail.ru>
++ * February 2007
++ *
++ * Matt Reimer <mreimer@vpop.net>
++ * April 2004, 2005, 2007
++ *
++ * Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>
++ * September 2004
++ */
++
++#include <linux/module.h>
++#include <linux/param.h>
++#include <linux/jiffies.h>
++#include <linux/delay.h>
++#include <linux/pm.h>
++#include <linux/platform_device.h>
++#include <linux/power_supply.h>
++#include <linux/bq27000_battery.h>
++
++enum bq27000_regs {
++ /* RAM regs */
++ /* read-write after this */
++ BQ27000_CTRL = 0, /* Device Control Register */
++ BQ27000_MODE, /* Device Mode Register */
++ BQ27000_AR_L, /* At-Rate H L */
++ BQ27000_AR_H,
++ /* read-only after this */
++ BQ27000_ARTTE_L, /* At-Rate Time To Empty H L */
++ BQ27000_ARTTE_H,
++ BQ27000_TEMP_L, /* Reported Temperature H L */
++ BQ27000_TEMP_H,
++ BQ27000_VOLT_L, /* Reported Voltage H L */
++ BQ27000_VOLT_H,
++ BQ27000_FLAGS, /* Status Flags */
++ BQ27000_RSOC, /* Relative State of Charge */
++ BQ27000_NAC_L, /* Nominal Available Capacity H L */
++ BQ27000_NAC_H,
++ BQ27000_CACD_L, /* Discharge Compensated H L */
++ BQ27000_CACD_H,
++ BQ27000_CACT_L, /* Temperature Compensated H L */
++ BQ27000_CACT_H,
++ BQ27000_LMD_L, /* Last measured discharge H L */
++ BQ27000_LMD_H,
++ BQ27000_AI_L, /* Average Current H L */
++ BQ27000_AI_H,
++ BQ27000_TTE_L, /* Time to Empty H L */
++ BQ27000_TTE_H,
++ BQ27000_TTF_L, /* Time to Full H L */
++ BQ27000_TTF_H,
++ BQ27000_SI_L, /* Standby Current H L */
++ BQ27000_SI_H,
++ BQ27000_STTE_L, /* Standby Time To Empty H L */
++ BQ27000_STTE_H,
++ BQ27000_MLI_L, /* Max Load Current H L */
++ BQ27000_MLI_H,
++ BQ27000_MLTTE_L, /* Max Load Time To Empty H L */
++ BQ27000_MLTTE_H,
++ BQ27000_SAE_L, /* Available Energy H L */
++ BQ27000_SAE_H,
++ BQ27000_AP_L, /* Available Power H L */
++ BQ27000_AP_H,
++ BQ27000_TTECP_L, /* Time to Empty at Constant Power H L */
++ BQ27000_TTECP_H,
++ BQ27000_CYCL_L, /* Cycle count since learning cycle H L */
++ BQ27000_CYCL_H,
++ BQ27000_CYCT_L, /* Cycle Count Total H L */
++ BQ27000_CYCT_H,
++ BQ27000_CSOC, /* Compensated State Of Charge */
++ /* EEPROM regs */
++ /* read-write after this */
++ BQ27000_EE_EE_EN = 0x6e, /* EEPROM Program Enable */
++ BQ27000_EE_ILMD = 0x76, /* Initial Last Measured Discharge High Byte */
++ BQ27000_EE_SEDVF, /* Scaled EDVF Threshold */
++ BQ27000_EE_SEDV1, /* Scaled EDV1 Threshold */
++ BQ27000_EE_ISLC, /* Initial Standby Load Current */
++ BQ27000_EE_DMFSD, /* Digital Magnitude Filter and Self Discharge */
++ BQ27000_EE_TAPER, /* Aging Estimate Enable, Charge Termination Taper */
++ BQ27000_EE_PKCFG, /* Pack Configuration Values */
++ BQ27000_EE_IMLC, /* Initial Max Load Current or ID #3 */
++ BQ27000_EE_DCOMP, /* Discharge rate compensation constants or ID #2 */
++ BQ27000_EE_TCOMP, /* Temperature Compensation constants or ID #1 */
++};
++
++enum bq27000_status_flags {
++ BQ27000_STATUS_CHGS = 0x80, /* 1 = being charged */
++ BQ27000_STATUS_NOACT = 0x40, /* 1 = no activity */
++ BQ27000_STATUS_IMIN = 0x20, /* 1 = Lion taper current mode */
++ BQ27000_STATUS_CI = 0x10, /* 1 = capacity likely innacurate */
++ BQ27000_STATUS_CALIP = 0x08, /* 1 = calibration in progress */
++ BQ27000_STATUS_VDQ = 0x04, /* 1 = capacity should be accurate */
++ BQ27000_STATUS_EDV1 = 0x02, /* 1 = end of discharge.. <6% left */
++ BQ27000_STATUS_EDVF = 0x01, /* 1 = no, it's really empty now */
++};
++
++#define NANOVOLTS_UNIT 3750
++
++struct bq27000_device_info {
++ struct device *dev;
++ struct power_supply bat;
++
++ int rsense_mohms; /* from platform */
++
++ int (*hdq_initialized)(void); /* from platform */
++ int (*hdq_read)(int); /* from platform */
++ int (*hdq_write)(int, u8); /* from platform */
++};
++
++/*
++ * reading 16 bit values over HDQ has a special hazard where the
++ * hdq device firmware can update the 16-bit register during the time we
++ * read the two halves. TI document SLUS556D recommends the algorithm here
++ * to avoid trouble
++ */
++
++static int hdq_read16(struct bq27000_device_info *di, int address)
++{
++ int acc;
++ int high;
++ int retries = 3;
++
++ while (retries--) {
++
++ high = (di->hdq_read)(address + 1); /* high part */
++
++ if (high < 0)
++ return high;
++ acc = (di->hdq_read)(address);
++ if (acc < 0)
++ return acc;
++
++ /* confirm high didn't change between reading it and low */
++ if (high == (di->hdq_read)(address + 1))
++ return (high << 8) | acc;
++ }
++
++ return -ETIME;
++}
++
++#define to_bq27000_device_info(x) container_of((x), \
++ struct bq27000_device_info, \
++ bat);
++
++static void bq27000_battery_external_power_changed(struct power_supply *psy)
++{
++ struct bq27000_device_info *di = to_bq27000_device_info(psy);
++
++ dev_dbg(di->dev, "%s\n", __FUNCTION__);
++}
++
++static int bq27000_battery_get_property(struct power_supply *psy,
++ enum power_supply_property psp,
++ union power_supply_propval *val)
++{
++ int v, n;
++ struct bq27000_device_info *di = to_bq27000_device_info(psy);
++
++ if (!(di->hdq_initialized)())
++ return -EINVAL;
++
++ switch (psp) {
++ case POWER_SUPPLY_PROP_STATUS:
++ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
++ v = hdq_read16(di, BQ27000_AI_L);
++ if (v < 0)
++ return v;
++ if (v < 2) { /* no real activity on the battery */
++ if (!hdq_read16(di, BQ27000_TTF_L))
++ val->intval = POWER_SUPPLY_STATUS_FULL;
++ else
++ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
++ break;
++ }
++ /* power is actually going in or out... */
++ v = (di->hdq_read)(BQ27000_FLAGS);
++ if (v < 0)
++ return v;
++ if (v & BQ27000_STATUS_CHGS)
++ val->intval = POWER_SUPPLY_STATUS_CHARGING;
++ else
++ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
++ break;
++ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
++ v = hdq_read16(di, BQ27000_VOLT_L);
++ if (v < 0)
++ return v;
++ val->intval = v * 1000; /* mV -> uV */
++ break;
++ case POWER_SUPPLY_PROP_CURRENT_NOW:
++ v = (di->hdq_read)(BQ27000_FLAGS);
++ if (v < 0)
++ return v;
++ if (v & BQ27000_STATUS_CHGS)
++ n = -NANOVOLTS_UNIT;
++ else
++ n = NANOVOLTS_UNIT;
++ v = hdq_read16(di, BQ27000_AI_L);
++ if (v < 0)
++ return v;
++ val->intval = (v * n) / di->rsense_mohms;
++ break;
++ case POWER_SUPPLY_PROP_CHARGE_FULL:
++ v = hdq_read16(di, BQ27000_LMD_L);
++ if (v < 0)
++ return v;
++ val->intval = (v * 3570) / di->rsense_mohms;
++ break;
++ case POWER_SUPPLY_PROP_TEMP:
++ v = hdq_read16(di, BQ27000_TEMP_L);
++ if (v < 0)
++ return v;
++ /* K (in 0.25K units) is 273.15 up from C (in 0.1C)*/
++ /* 10926 = 27315 * 4 / 10 */
++ val->intval = (((long)v * 10l) - 10926) / 4;
++ break;
++ case POWER_SUPPLY_PROP_TECHNOLOGY:
++ val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
++ break;
++ case POWER_SUPPLY_PROP_CAPACITY:
++ val->intval = (di->hdq_read)(BQ27000_RSOC);
++ if (val->intval < 0)
++ return val->intval;
++ break;
++ case POWER_SUPPLY_PROP_PRESENT:
++ v = (di->hdq_read)(BQ27000_RSOC);
++ val->intval = !(v < 0);
++ break;
++ case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
++ v = hdq_read16(di, BQ27000_TTE_L);
++ if (v < 0)
++ return v;
++ val->intval = 60 * v;
++ break;
++ case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
++ v = hdq_read16(di, BQ27000_TTF_L);
++ if (v < 0)
++ return v;
++ val->intval = 60 * v;
++ break;
++ default:
++ return -EINVAL;
++ }
++
++ return 0;
++}
++
++static enum power_supply_property bq27000_battery_props[] = {
++ POWER_SUPPLY_PROP_STATUS,
++ POWER_SUPPLY_PROP_VOLTAGE_NOW,
++ POWER_SUPPLY_PROP_CURRENT_NOW,
++ POWER_SUPPLY_PROP_CHARGE_FULL,
++ POWER_SUPPLY_PROP_TEMP,
++ POWER_SUPPLY_PROP_TECHNOLOGY,
++ POWER_SUPPLY_PROP_PRESENT,
++ POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
++ POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
++ POWER_SUPPLY_PROP_MODEL_NAME,
++ POWER_SUPPLY_PROP_CAPACITY
++};
++
++static int bq27000_battery_probe(struct platform_device *pdev)
++{
++ int retval = 0;
++ struct bq27000_device_info *di;
++ struct bq27000_platform_data *pdata;
++
++ dev_info(&pdev->dev, "BQ27000 Battery Driver (C) 2008 Openmoko, Inc\n");
++
++ di = kzalloc(sizeof(*di), GFP_KERNEL);
++ if (!di) {
++ retval = -ENOMEM;
++ goto di_alloc_failed;
++ }
++
++ platform_set_drvdata(pdev, di);
++
++ pdata = pdev->dev.platform_data;
++ di->dev = &pdev->dev;
++ /* di->w1_dev = pdev->dev.parent; */
++ di->bat.name = pdata->name;
++ di->bat.type = POWER_SUPPLY_TYPE_BATTERY;
++ di->bat.properties = bq27000_battery_props;
++ di->bat.num_properties = ARRAY_SIZE(bq27000_battery_props);
++ di->bat.get_property = bq27000_battery_get_property;
++ di->bat.external_power_changed =
++ bq27000_battery_external_power_changed;
++ di->hdq_read = pdata->hdq_read;
++ di->hdq_write = pdata->hdq_write;
++ di->rsense_mohms = pdata->rsense_mohms;
++ di->hdq_initialized = pdata->hdq_initialized;
++
++ retval = power_supply_register(&pdev->dev, &di->bat);
++ if (retval) {
++ dev_err(di->dev, "failed to register battery\n");
++ goto batt_failed;
++ }
++
++ return 0;
++
++batt_failed:
++ kfree(di);
++di_alloc_failed:
++ return retval;
++}
++
++static int bq27000_battery_remove(struct platform_device *pdev)
++{
++ struct bq27000_device_info *di = platform_get_drvdata(pdev);
++
++ power_supply_unregister(&di->bat);
++
++ return 0;
++}
++
++#ifdef CONFIG_PM
++
++static int bq27000_battery_suspend(struct platform_device *pdev,
++ pm_message_t state)
++{
++ return 0;
++}
++
++static int bq27000_battery_resume(struct platform_device *pdev)
++{
++ return 0;
++}
++
++#else
++
++#define bq27000_battery_suspend NULL
++#define bq27000_battery_resume NULL
++
++#endif /* CONFIG_PM */
++
++static struct platform_driver bq27000_battery_driver = {
++ .driver = {
++ .name = "bq27000-battery",
++ },
++ .probe = bq27000_battery_probe,
++ .remove = bq27000_battery_remove,
++ .suspend = bq27000_battery_suspend,
++ .resume = bq27000_battery_resume,
++};
++
++static int __init bq27000_battery_init(void)
++{
++ return platform_driver_register(&bq27000_battery_driver);
++}
++
++static void __exit bq27000_battery_exit(void)
++{
++ platform_driver_unregister(&bq27000_battery_driver);
++}
++
++module_init(bq27000_battery_init);
++module_exit(bq27000_battery_exit);
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Andy Green <andy@openmoko.com>");
++MODULE_DESCRIPTION("bq27000 battery driver");
+diff --git a/include/linux/bq27000_battery.h b/include/linux/bq27000_battery.h
+new file mode 100644
+index 0000000..36b4f20
+--- /dev/null
++++ b/include/linux/bq27000_battery.h
+@@ -0,0 +1,12 @@
++#ifndef __BQ27000_BATTERY_H__
++#define __BQ27000_BATTERY_H__
++
++struct bq27000_platform_data {
++ const char *name;
++ int rsense_mohms;
++ int (*hdq_read)(int);
++ int (*hdq_write)(int, u8);
++ int (*hdq_initialized)(void);
++};
++
++#endif
+--
+1.5.6.5
+
projects / openwrt.git / blobdiff