+++ /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