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511 lines
14 KiB
Diff
Executable File
511 lines
14 KiB
Diff
Executable File
From 2bab304b10f077cb88d5b5f5bd7e50c16aac2132 Mon Sep 17 00:00:00 2001
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From: mokopatches <mokopatches@openmoko.org>
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Date: Fri, 25 Jul 2008 22:21:23 +0100
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Subject: [PATCH] bq27000-battery-driver.patch
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---
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arch/arm/mach-s3c2440/Kconfig | 2 +
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arch/arm/mach-s3c2440/mach-gta02.c | 21 ++
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drivers/power/Kconfig | 7 +-
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drivers/power/Makefile | 1 +
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drivers/power/bq27000_battery.c | 375 ++++++++++++++++++++++++++++++++++++
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include/linux/bq27000_battery.h | 12 ++
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6 files changed, 417 insertions(+), 1 deletions(-)
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create mode 100644 drivers/power/bq27000_battery.c
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create mode 100644 include/linux/bq27000_battery.h
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diff --git a/arch/arm/mach-s3c2440/Kconfig b/arch/arm/mach-s3c2440/Kconfig
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index 3015aaf..b417f8e 100644
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--- a/arch/arm/mach-s3c2440/Kconfig
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+++ b/arch/arm/mach-s3c2440/Kconfig
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@@ -79,6 +79,8 @@ config MACH_NEO1973_GTA02
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bool "FIC Neo1973 GSM Phone (GTA02 Hardware)"
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select CPU_S3C2442
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select SENSORS_PCF50633
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+ select POWER_SUPPLY
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+ select GTA02_HDQ
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help
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Say Y here if you are using the FIC Neo1973 GSM Phone
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diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
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index cea76e7..3816ea5 100644
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--- a/arch/arm/mach-s3c2440/mach-gta02.c
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+++ b/arch/arm/mach-s3c2440/mach-gta02.c
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@@ -81,6 +81,8 @@
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#include <asm/arch/fiq_ipc_gta02.h>
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#include "fiq_c_isr.h"
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+#include <linux/gta02_hdq.h>
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+#include <linux/bq27000_battery.h>
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/* arbitrates which sensor IRQ owns the shared SPI bus */
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static spinlock_t motion_irq_lock;
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@@ -583,6 +585,24 @@ struct platform_device gta02_hdq_device = {
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};
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#endif
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+/* BQ27000 Battery */
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+
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+struct bq27000_platform_data bq27000_pdata = {
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+ .name = "bat",
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+ .rsense_mohms = 20,
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+ .hdq_read = gta02hdq_read,
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+ .hdq_write = gta02hdq_write,
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+ .hdq_initialized = gta02hdq_initialized,
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+};
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+
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+struct platform_device bq27000_battery_device = {
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+ .name = "bq27000-battery",
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+ .dev = {
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+ .platform_data = &bq27000_pdata,
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+ },
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+};
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+
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+
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/* NOR Flash */
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#define GTA02_FLASH_BASE 0x18000000 /* GCS3 */
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@@ -1271,6 +1291,7 @@ static void __init gta02_machine_init(void)
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case GTA02v5_SYSTEM_REV:
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case GTA02v6_SYSTEM_REV:
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platform_device_register(>a02_hdq_device);
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+ platform_device_register(&bq27000_battery_device);
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break;
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default:
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break;
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diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
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index 0a4515d..feb8b0a 100644
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--- a/drivers/power/Kconfig
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+++ b/drivers/power/Kconfig
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@@ -49,7 +49,10 @@ config BATTERY_OLPC
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help
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Say Y to enable support for the battery on the OLPC laptop.
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-endif # POWER_SUPPLY
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+config BATTERY_BQ27000_HDQ
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+ tristate "BQ27000 HDQ battery monitor driver"
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+ help
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+ Say Y to enable support for the battery on the Neo Freerunner
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config GTA02_HDQ
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tristate "Neo Freerunner HDQ"
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@@ -58,3 +61,5 @@ config GTA02_HDQ
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Say Y to enable support for communicating with an HDQ battery
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on the Neo Freerunner. You probably want to select
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at least BATTERY_BQ27000_HDQ as well
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+
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+endif # POWER_SUPPLY
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diff --git a/drivers/power/Makefile b/drivers/power/Makefile
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index 88f227f..d7e87ad 100644
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--- a/drivers/power/Makefile
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+++ b/drivers/power/Makefile
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@@ -20,5 +20,6 @@ obj-$(CONFIG_APM_POWER) += apm_power.o
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obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
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obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o
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obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o
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+obj-$(CONFIG_BATTERY_BQ27000_HDQ) += bq27000_battery.o
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obj-$(CONFIG_GTA02_HDQ) += gta02_hdq.o
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diff --git a/drivers/power/bq27000_battery.c b/drivers/power/bq27000_battery.c
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new file mode 100644
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index 0000000..d19186a
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--- /dev/null
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+++ b/drivers/power/bq27000_battery.c
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@@ -0,0 +1,375 @@
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+/*
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+ * Driver for batteries with bq27000 chips inside via HDQ
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+ *
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+ * Copyright 2008 Openmoko, Inc
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+ * Andy Green <andy@openmoko.com>
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+ *
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+ * based on ds2760 driver, original copyright notice for that --->
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+ *
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+ * Copyright © 2007 Anton Vorontsov
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+ * 2004-2007 Matt Reimer
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+ * 2004 Szabolcs Gyurko
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+ *
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+ * Use consistent with the GNU GPL is permitted,
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+ * provided that this copyright notice is
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+ * preserved in its entirety in all copies and derived works.
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+ *
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+ * Author: Anton Vorontsov <cbou@mail.ru>
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+ * February 2007
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+ *
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+ * Matt Reimer <mreimer@vpop.net>
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+ * April 2004, 2005, 2007
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+ *
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+ * Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>
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+ * September 2004
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/param.h>
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+#include <linux/jiffies.h>
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+#include <linux/delay.h>
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+#include <linux/pm.h>
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+#include <linux/platform_device.h>
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+#include <linux/power_supply.h>
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+#include <linux/bq27000_battery.h>
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+
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+enum bq27000_regs {
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+ /* RAM regs */
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+ /* read-write after this */
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+ BQ27000_CTRL = 0, /* Device Control Register */
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+ BQ27000_MODE, /* Device Mode Register */
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+ BQ27000_AR_L, /* At-Rate H L */
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+ BQ27000_AR_H,
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+ /* read-only after this */
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+ BQ27000_ARTTE_L, /* At-Rate Time To Empty H L */
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+ BQ27000_ARTTE_H,
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+ BQ27000_TEMP_L, /* Reported Temperature H L */
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+ BQ27000_TEMP_H,
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+ BQ27000_VOLT_L, /* Reported Voltage H L */
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+ BQ27000_VOLT_H,
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+ BQ27000_FLAGS, /* Status Flags */
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+ BQ27000_RSOC, /* Relative State of Charge */
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+ BQ27000_NAC_L, /* Nominal Available Capacity H L */
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+ BQ27000_NAC_H,
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+ BQ27000_CACD_L, /* Discharge Compensated H L */
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+ BQ27000_CACD_H,
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+ BQ27000_CACT_L, /* Temperature Compensated H L */
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+ BQ27000_CACT_H,
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+ BQ27000_LMD_L, /* Last measured discharge H L */
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+ BQ27000_LMD_H,
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+ BQ27000_AI_L, /* Average Current H L */
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+ BQ27000_AI_H,
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+ BQ27000_TTE_L, /* Time to Empty H L */
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+ BQ27000_TTE_H,
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+ BQ27000_TTF_L, /* Time to Full H L */
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+ BQ27000_TTF_H,
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+ BQ27000_SI_L, /* Standby Current H L */
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+ BQ27000_SI_H,
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+ BQ27000_STTE_L, /* Standby Time To Empty H L */
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+ BQ27000_STTE_H,
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+ BQ27000_MLI_L, /* Max Load Current H L */
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+ BQ27000_MLI_H,
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+ BQ27000_MLTTE_L, /* Max Load Time To Empty H L */
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+ BQ27000_MLTTE_H,
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+ BQ27000_SAE_L, /* Available Energy H L */
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+ BQ27000_SAE_H,
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+ BQ27000_AP_L, /* Available Power H L */
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+ BQ27000_AP_H,
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+ BQ27000_TTECP_L, /* Time to Empty at Constant Power H L */
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+ BQ27000_TTECP_H,
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+ BQ27000_CYCL_L, /* Cycle count since learning cycle H L */
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+ BQ27000_CYCL_H,
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+ BQ27000_CYCT_L, /* Cycle Count Total H L */
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+ BQ27000_CYCT_H,
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+ BQ27000_CSOC, /* Compensated State Of Charge */
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+ /* EEPROM regs */
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+ /* read-write after this */
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+ BQ27000_EE_EE_EN = 0x6e, /* EEPROM Program Enable */
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+ BQ27000_EE_ILMD = 0x76, /* Initial Last Measured Discharge High Byte */
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+ BQ27000_EE_SEDVF, /* Scaled EDVF Threshold */
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+ BQ27000_EE_SEDV1, /* Scaled EDV1 Threshold */
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+ BQ27000_EE_ISLC, /* Initial Standby Load Current */
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+ BQ27000_EE_DMFSD, /* Digital Magnitude Filter and Self Discharge */
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+ BQ27000_EE_TAPER, /* Aging Estimate Enable, Charge Termination Taper */
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+ BQ27000_EE_PKCFG, /* Pack Configuration Values */
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+ BQ27000_EE_IMLC, /* Initial Max Load Current or ID #3 */
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+ BQ27000_EE_DCOMP, /* Discharge rate compensation constants or ID #2 */
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+ BQ27000_EE_TCOMP, /* Temperature Compensation constants or ID #1 */
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+};
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+
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+enum bq27000_status_flags {
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+ BQ27000_STATUS_CHGS = 0x80, /* 1 = being charged */
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+ BQ27000_STATUS_NOACT = 0x40, /* 1 = no activity */
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+ BQ27000_STATUS_IMIN = 0x20, /* 1 = Lion taper current mode */
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+ BQ27000_STATUS_CI = 0x10, /* 1 = capacity likely innacurate */
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+ BQ27000_STATUS_CALIP = 0x08, /* 1 = calibration in progress */
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+ BQ27000_STATUS_VDQ = 0x04, /* 1 = capacity should be accurate */
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+ BQ27000_STATUS_EDV1 = 0x02, /* 1 = end of discharge.. <6% left */
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+ BQ27000_STATUS_EDVF = 0x01, /* 1 = no, it's really empty now */
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+};
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+
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+#define NANOVOLTS_UNIT 3750
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+
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+struct bq27000_device_info {
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+ struct device *dev;
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+ struct power_supply bat;
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+
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+ int rsense_mohms; /* from platform */
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+
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+ int (*hdq_initialized)(void); /* from platform */
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+ int (*hdq_read)(int); /* from platform */
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+ int (*hdq_write)(int, u8); /* from platform */
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+};
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+
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+/*
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+ * reading 16 bit values over HDQ has a special hazard where the
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+ * hdq device firmware can update the 16-bit register during the time we
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+ * read the two halves. TI document SLUS556D recommends the algorithm here
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+ * to avoid trouble
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+ */
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+
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+static int hdq_read16(struct bq27000_device_info *di, int address)
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+{
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+ int acc;
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+ int high;
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+ int retries = 3;
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+
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+ while (retries--) {
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+
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+ high = (di->hdq_read)(address + 1); /* high part */
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+
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+ if (high < 0)
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+ return high;
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+ acc = (di->hdq_read)(address);
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+ if (acc < 0)
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+ return acc;
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+
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+ /* confirm high didn't change between reading it and low */
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+ if (high == (di->hdq_read)(address + 1))
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+ return (high << 8) | acc;
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+ }
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+
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+ return -ETIME;
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+}
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+
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+#define to_bq27000_device_info(x) container_of((x), \
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+ struct bq27000_device_info, \
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+ bat);
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+
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+static void bq27000_battery_external_power_changed(struct power_supply *psy)
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+{
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+ struct bq27000_device_info *di = to_bq27000_device_info(psy);
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+
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+ dev_dbg(di->dev, "%s\n", __FUNCTION__);
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+}
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+
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+static int bq27000_battery_get_property(struct power_supply *psy,
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+ enum power_supply_property psp,
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+ union power_supply_propval *val)
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+{
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+ int v, n;
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+ struct bq27000_device_info *di = to_bq27000_device_info(psy);
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+
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+ if (!(di->hdq_initialized)())
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+ return -EINVAL;
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+
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+ switch (psp) {
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+ case POWER_SUPPLY_PROP_STATUS:
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+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
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+ v = hdq_read16(di, BQ27000_AI_L);
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+ if (v < 0)
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+ return v;
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+ if (v < 2) { /* no real activity on the battery */
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+ if (!hdq_read16(di, BQ27000_TTF_L))
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+ val->intval = POWER_SUPPLY_STATUS_FULL;
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+ else
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+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
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+ break;
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+ }
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+ /* power is actually going in or out... */
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+ v = (di->hdq_read)(BQ27000_FLAGS);
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+ if (v < 0)
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+ return v;
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+ if (v & BQ27000_STATUS_CHGS)
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+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
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+ else
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+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
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+ break;
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+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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+ v = hdq_read16(di, BQ27000_VOLT_L);
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+ if (v < 0)
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+ return v;
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+ val->intval = v * 1000; /* mV -> uV */
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+ break;
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+ case POWER_SUPPLY_PROP_CURRENT_NOW:
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+ v = (di->hdq_read)(BQ27000_FLAGS);
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+ if (v < 0)
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+ return v;
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+ if (v & BQ27000_STATUS_CHGS)
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+ n = -NANOVOLTS_UNIT;
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+ else
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+ n = NANOVOLTS_UNIT;
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+ v = hdq_read16(di, BQ27000_AI_L);
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+ if (v < 0)
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+ return v;
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+ val->intval = (v * n) / di->rsense_mohms;
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+ break;
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+ case POWER_SUPPLY_PROP_CHARGE_FULL:
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+ v = hdq_read16(di, BQ27000_LMD_L);
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+ if (v < 0)
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+ return v;
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+ val->intval = (v * 3570) / di->rsense_mohms;
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+ break;
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+ case POWER_SUPPLY_PROP_TEMP:
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+ v = hdq_read16(di, BQ27000_TEMP_L);
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+ if (v < 0)
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+ return v;
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+ /* K (in 0.25K units) is 273.15 up from C (in 0.1C)*/
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+ /* 10926 = 27315 * 4 / 10 */
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+ val->intval = (((long)v * 10l) - 10926) / 4;
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+ break;
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+ case POWER_SUPPLY_PROP_TECHNOLOGY:
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+ val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
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+ break;
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+ case POWER_SUPPLY_PROP_CAPACITY:
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+ val->intval = (di->hdq_read)(BQ27000_RSOC);
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+ if (val->intval < 0)
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+ return val->intval;
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+ break;
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+ case POWER_SUPPLY_PROP_PRESENT:
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+ v = (di->hdq_read)(BQ27000_RSOC);
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+ val->intval = !(v < 0);
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+ break;
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+ case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
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+ v = hdq_read16(di, BQ27000_TTE_L);
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+ if (v < 0)
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+ return v;
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+ val->intval = 60 * v;
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+ break;
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+ case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
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+ v = hdq_read16(di, BQ27000_TTF_L);
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+ if (v < 0)
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+ return v;
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+ val->intval = 60 * v;
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+
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+ return 0;
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+}
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+
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+static enum power_supply_property bq27000_battery_props[] = {
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+ POWER_SUPPLY_PROP_STATUS,
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+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
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+ POWER_SUPPLY_PROP_CURRENT_NOW,
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+ POWER_SUPPLY_PROP_CHARGE_FULL,
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+ POWER_SUPPLY_PROP_TEMP,
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+ POWER_SUPPLY_PROP_TECHNOLOGY,
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+ POWER_SUPPLY_PROP_PRESENT,
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+ POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
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+ POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
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+ POWER_SUPPLY_PROP_MODEL_NAME,
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+ POWER_SUPPLY_PROP_CAPACITY
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+};
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+
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+static int bq27000_battery_probe(struct platform_device *pdev)
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+{
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+ int retval = 0;
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+ struct bq27000_device_info *di;
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+ struct bq27000_platform_data *pdata;
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+
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+ dev_info(&pdev->dev, "BQ27000 Battery Driver (C) 2008 Openmoko, Inc\n");
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+
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+ di = kzalloc(sizeof(*di), GFP_KERNEL);
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+ if (!di) {
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+ retval = -ENOMEM;
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+ goto di_alloc_failed;
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+ }
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+
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+ platform_set_drvdata(pdev, di);
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+
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+ pdata = pdev->dev.platform_data;
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+ di->dev = &pdev->dev;
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+ /* di->w1_dev = pdev->dev.parent; */
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+ di->bat.name = pdata->name;
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+ di->bat.type = POWER_SUPPLY_TYPE_BATTERY;
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+ di->bat.properties = bq27000_battery_props;
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+ di->bat.num_properties = ARRAY_SIZE(bq27000_battery_props);
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+ di->bat.get_property = bq27000_battery_get_property;
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+ 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
|
|
--
|
|
1.5.6.3
|
|
|