From f6498705703f69814dbe43da1deb9e53f309f4da Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20B=C3=BCsch?= <mb@bu3sch.de>
Date: Thu, 7 Oct 2010 09:58:37 +0000
Subject: omap24xx: Improve n810 battery management
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23282 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
target/linux/omap24xx/Makefile | 2 +-
.../linux/omap24xx/patches-2.6.36/500-cbus.patch | 42 ++--
.../900-n810-battery-management.patch | 258 ++++++++++++++++-----
3 files changed, 226 insertions(+), 76 deletions(-)
diff --git a/target/linux/omap24xx/Makefile b/target/linux/omap24xx/Makefile
index cc9169bbf1..b2fb5b6560 100644
--- a/target/linux/omap24xx/Makefile
+++ b/target/linux/omap24xx/Makefile
@@ -12,7 +12,7 @@ BOARDNAME:=TI OMAP-24xx
MAINTAINER:=Michael Buesch <mb@bu3sch.de>
FEATURES:=targz squashfs jffs2 usb usbgadget display gpio audio
-LINUX_VERSION:=2.6.36-rc6
+LINUX_VERSION:=2.6.36-rc7
define Target/Description
TI OMAP-24xx
diff --git a/target/linux/omap24xx/patches-2.6.36/500-cbus.patch b/target/linux/omap24xx/patches-2.6.36/500-cbus.patch
index 91c8ac076b..aba59bc146 100644
--- a/target/linux/omap24xx/patches-2.6.36/500-cbus.patch
+++ b/target/linux/omap24xx/patches-2.6.36/500-cbus.patch
@@ -20,7 +20,7 @@
18 files changed, 4533 insertions(+), 1 deletion(-)
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/cbus.c
++++ linux-2.6.36-rc7/drivers/cbus/cbus.c
@@ -0,0 +1,309 @@
+/*
+ * drivers/cbus/cbus.c
@@ -332,7 +332,7 @@
+MODULE_AUTHOR("Mikko Ylinen");
+
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/cbus.h
++++ linux-2.6.36-rc7/drivers/cbus/cbus.h
@@ -0,0 +1,36 @@
+/*
+ * drivers/cbus/cbus.h
@@ -371,7 +371,7 @@
+
+#endif /* __DRIVERS_CBUS_CBUS_H */
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/Kconfig
++++ linux-2.6.36-rc7/drivers/cbus/Kconfig
@@ -0,0 +1,89 @@
+#
+# CBUS device configuration
@@ -463,7 +463,7 @@
+
+endmenu
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/Makefile
++++ linux-2.6.36-rc7/drivers/cbus/Makefile
@@ -0,0 +1,14 @@
+#
+# Makefile for CBUS.
@@ -480,7 +480,7 @@
+obj-$(CONFIG_CBUS_RETU_USER) += retu-user.o
+obj-$(CONFIG_CBUS_RETU_HEADSET) += retu-headset.o
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/retu.c
++++ linux-2.6.36-rc7/drivers/cbus/retu.c
@@ -0,0 +1,468 @@
+/**
+ * drivers/cbus/retu.c
@@ -951,7 +951,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Juha Yrj�l�, David Weinehall, and Mikko Ylinen");
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/retu.h
++++ linux-2.6.36-rc7/drivers/cbus/retu.h
@@ -0,0 +1,77 @@
+/**
+ * drivers/cbus/retu.h
@@ -1031,7 +1031,7 @@
+
+#endif /* __DRIVERS_CBUS_RETU_H */
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/retu-headset.c
++++ linux-2.6.36-rc7/drivers/cbus/retu-headset.c
@@ -0,0 +1,356 @@
+/**
+ * Retu/Vilma headset detection
@@ -1390,7 +1390,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Juha Yrj�l�");
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/retu-pwrbutton.c
++++ linux-2.6.36-rc7/drivers/cbus/retu-pwrbutton.c
@@ -0,0 +1,118 @@
+/**
+ * drivers/cbus/retu-pwrbutton.c
@@ -1511,7 +1511,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ari Saastamoinen");
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/retu-rtc.c
++++ linux-2.6.36-rc7/drivers/cbus/retu-rtc.c
@@ -0,0 +1,477 @@
+/**
+ * drivers/cbus/retu-rtc.c
@@ -1991,7 +1991,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Paul Mundt and Igor Stoppa");
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/retu-user.c
++++ linux-2.6.36-rc7/drivers/cbus/retu-user.c
@@ -0,0 +1,424 @@
+/**
+ * drivers/cbus/retu-user.c
@@ -2418,7 +2418,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mikko Ylinen");
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/retu-wdt.c
++++ linux-2.6.36-rc7/drivers/cbus/retu-wdt.c
@@ -0,0 +1,387 @@
+/**
+ * drivers/cbus/retu-wdt.c
@@ -2808,7 +2808,7 @@
+MODULE_LICENSE("GPL");
+
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/tahvo.c
++++ linux-2.6.36-rc7/drivers/cbus/tahvo.c
@@ -0,0 +1,443 @@
+/**
+ * drivers/cbus/tahvo.c
@@ -3254,7 +3254,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Juha Yrj�l�, David Weinehall, and Mikko Ylinen");
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/tahvo.h
++++ linux-2.6.36-rc7/drivers/cbus/tahvo.h
@@ -0,0 +1,61 @@
+/*
+ * drivers/cbus/tahvo.h
@@ -3318,7 +3318,7 @@
+
+#endif /* __DRIVERS_CBUS_TAHVO_H */
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/tahvo-usb.c
++++ linux-2.6.36-rc7/drivers/cbus/tahvo-usb.c
@@ -0,0 +1,788 @@
+/**
+ * drivers/cbus/tahvo-usb.c
@@ -4109,7 +4109,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Juha Yrj�l�, Tony Lindgren, and Timo Ter�s");
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/tahvo-user.c
++++ linux-2.6.36-rc7/drivers/cbus/tahvo-user.c
@@ -0,0 +1,406 @@
+/**
+ * drivers/cbus/tahvo-user.c
@@ -4518,7 +4518,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mikko Ylinen");
--- /dev/null
-+++ linux-2.6.36-rc4/drivers/cbus/user_retu_tahvo.h
++++ linux-2.6.36-rc7/drivers/cbus/user_retu_tahvo.h
@@ -0,0 +1,75 @@
+/**
+ * drivers/cbus/user_retu_tahvo.h
@@ -4595,8 +4595,8 @@
+};
+
+#endif
---- linux-2.6.36-rc4.orig/drivers/Makefile
-+++ linux-2.6.36-rc4/drivers/Makefile
+--- linux-2.6.36-rc7.orig/drivers/Makefile
++++ linux-2.6.36-rc7/drivers/Makefile
@@ -74,7 +74,7 @@ obj-$(CONFIG_GAMEPORT) += input/gamepor
obj-$(CONFIG_INPUT) += input/
obj-$(CONFIG_I2O) += message/
@@ -4606,9 +4606,9 @@
obj-$(CONFIG_PPS) += pps/
obj-$(CONFIG_W1) += w1/
obj-$(CONFIG_POWER_SUPPLY) += power/
---- linux-2.6.36-rc4.orig/arch/arm/Kconfig
-+++ linux-2.6.36-rc4/arch/arm/Kconfig
-@@ -1760,6 +1760,10 @@ source "net/Kconfig"
+--- linux-2.6.36-rc7.orig/arch/arm/Kconfig
++++ linux-2.6.36-rc7/arch/arm/Kconfig
+@@ -1785,6 +1785,10 @@ source "net/Kconfig"
source "drivers/Kconfig"
diff --git a/target/linux/omap24xx/patches-2.6.36/900-n810-battery-management.patch b/target/linux/omap24xx/patches-2.6.36/900-n810-battery-management.patch
index f3b8edbe86..5e4c8208d0 100644
--- a/target/linux/omap24xx/patches-2.6.36/900-n810-battery-management.patch
+++ b/target/linux/omap24xx/patches-2.6.36/900-n810-battery-management.patch
@@ -1,14 +1,17 @@
---
arch/arm/mach-omap2/board-n8x0.c | 13 +
drivers/cbus/Kconfig | 12 +
- drivers/cbus/Makefile | 1
- drivers/cbus/n810bm.c | 396 +++++++++++++++++++++++++++++++++++++++
+ drivers/cbus/Makefile | 3
+ drivers/cbus/lipocharge.c | 63 ++++++
+ drivers/cbus/lipocharge.h | 50 ++++
+ drivers/cbus/n810bm_main.c | 397 +++++++++++++++++++++++++++++++++++++++
drivers/cbus/retu.c | 4
- drivers/cbus/retu.h | 2
- 6 files changed, 425 insertions(+), 3 deletions(-)
+ drivers/cbus/retu.h | 3
+ drivers/cbus/tahvo.h | 6
+ 9 files changed, 548 insertions(+), 3 deletions(-)
---- linux-2.6.36-rc5.orig/drivers/cbus/Kconfig
-+++ linux-2.6.36-rc5/drivers/cbus/Kconfig
+--- linux-2.6.36-rc7.orig/drivers/cbus/Kconfig
++++ linux-2.6.36-rc7/drivers/cbus/Kconfig
@@ -94,4 +94,16 @@ config CBUS_RETU_HEADSET
to Retu/Vilma. Detection state and events are exposed through
sysfs.
@@ -26,16 +29,18 @@
+ If unsure, say N.
+
endmenu
---- linux-2.6.36-rc5.orig/drivers/cbus/Makefile
-+++ linux-2.6.36-rc5/drivers/cbus/Makefile
-@@ -12,3 +12,4 @@ obj-$(CONFIG_CBUS_RETU_WDT) += retu-wdt.
+--- linux-2.6.36-rc7.orig/drivers/cbus/Makefile
++++ linux-2.6.36-rc7/drivers/cbus/Makefile
+@@ -12,3 +12,6 @@ obj-$(CONFIG_CBUS_RETU_WDT) += retu-wdt.
obj-$(CONFIG_CBUS_TAHVO_USER) += tahvo-user.o
obj-$(CONFIG_CBUS_RETU_USER) += retu-user.o
obj-$(CONFIG_CBUS_RETU_HEADSET) += retu-headset.o
++n810bm-y += n810bm_main.o
++n810bm-y += lipocharge.o
+obj-$(CONFIG_N810BM) += n810bm.o
--- /dev/null
-+++ linux-2.6.36-rc5/drivers/cbus/n810bm.c
-@@ -0,0 +1,396 @@
++++ linux-2.6.36-rc7/drivers/cbus/n810bm_main.c
+@@ -0,0 +1,397 @@
+/*
+ * Nokia n810 battery management
+ *
@@ -66,13 +71,11 @@
+
+#include "retu.h"
+#include "tahvo.h"
++#include "lipocharge.h"
+
+
+#define N810BM_CHECK_INTERVAL (HZ * 5)
-+#define N810BM_MIN_VOLTAGE_THRES 3400 /* Absolute minimum voltage threshold */
-+/* FIXME: Not sure about the actual value of the low threshold, yet.
-+ * We must give userspace a chance to detect undervoltage and perform
-+ * a clean shutdown, before we flip the big switch. */
++#define N810BM_MIN_VOLTAGE_THRES 3300 /* Absolute minimum voltage threshold */
+
+
+/* Battery related retu ADC channels */
@@ -126,8 +129,12 @@
+
+struct n810bm {
+ struct platform_device *pdev;
++
+ enum n810bm_capacity capacity;
+ struct timer_list check_timer;
++
++ struct lipocharge *charger;
++
+ spinlock_t lock;
+};
+
@@ -135,7 +142,7 @@
+static NORET_TYPE void n810bm_emergency(struct n810bm *bm, const char *message) ATTRIB_NORET;
+static void n810bm_emergency(struct n810bm *bm, const char *message)
+{
-+ printk(KERN_EMERG "Nokia n810 battery management fatal fault: %s\n", message);
++ printk(KERN_EMERG "n810 battery management fatal fault: %s\n", message);
+ /* Force a hard shutdown. */
+ machine_power_off();
+ panic("n810bm: Failed to halt machine in emergency state\n");
@@ -230,50 +237,33 @@
+static enum n810bm_capacity n810bm_read_batt_capacity(struct n810bm *bm)
+{
+ int adc;
-+ const unsigned int hyst = 16;
++ const unsigned int hyst = 20;
+
+ adc = retu_adc_average(bm, RETU_ADC_BSI, 5);
-+ if (adc < 0)
++ if (adc < 0) {
++ dev_err(&bm->pdev->dev, "Failed to read BSI ADC");
+ return N810BM_CAP_UNKNOWN;
++ }
+
-+ if (adc >= 0x3AC - hyst && adc <= 0x3AC + hyst)
++ if (adc >= 0x3B5 - hyst && adc <= 0x3B5 + hyst)
+ return N810BM_CAP_1500MAH;
+
++ dev_err(&bm->pdev->dev, "Capacity indicator 0x%X unknown", adc);
++
+ return N810BM_CAP_UNKNOWN;
+}
+
-+struct mv2p {
-+ unsigned int mv;
-+ unsigned int p;
-+};
-+
+/* Convert a battery voltage (in mV) to percentage. */
+static unsigned int n810bm_mvolt2percent(unsigned int mv)
+{
-+ /* FIXME: Create a correct table. */
-+ static const struct mv2p table[] = {
-+ { .mv = 4200, .p = 100, },
-+ { .mv = 4150, .p = 90, },
-+ { .mv = 4100, .p = 80, },
-+ { .mv = 4050, .p = 70, },
-+ { .mv = 4000, .p = 60, },
-+ { .mv = 3950, .p = 50, },
-+ { .mv = 3900, .p = 40, },
-+ { .mv = 3850, .p = 30, },
-+ { .mv = 3800, .p = 20, },
-+ { .mv = 3750, .p = 10, },
-+ { .mv = 3700, .p = 0, },
-+ };
-+ const struct mv2p *e;
-+ unsigned int i;
-+
-+ for (i = 0; i < ARRAY_SIZE(table); i++) {
-+ e = &table[i];
-+ if (mv >= e->mv)
-+ return e->p;
-+ }
++ const unsigned int minv = 3700;
++ const unsigned int maxv = 4150;
++ unsigned int percent;
+
-+ return 0;
++ mv = clamp(mv, minv, maxv);
++ percent = (mv - minv) * 100 / (maxv - minv);
++
++ return percent;
+}
+
+static void n810bm_check_timer(unsigned long data)
@@ -296,6 +286,15 @@
+ return;
+}
+
++static void n810bm_adc_irq_handler(unsigned long data)
++{
++ struct n810bm *bm = (struct n810bm *)data;
++
++ retu_ack_irq(RETU_INT_ADCS);
++ //TODO
++printk("n810bm: ADC timer triggered\n");
++}
++
+static ssize_t n810bm_attr_charge_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
@@ -378,6 +377,10 @@
+ err = device_create_file(&pdev->dev, &dev_attr_batt_capacity);
+ if (err)
+ goto err_rem_charge;
++ err = retu_request_irq(RETU_INT_ADCS, n810bm_adc_irq_handler,
++ (unsigned long)bm, "n810bm");
++ if (err)
++ goto err_rem_capa;
+
+ mod_timer(&bm->check_timer, round_jiffies(jiffies + N810BM_CHECK_INTERVAL));
+
@@ -385,6 +388,8 @@
+
+ return 0;
+
++err_rem_capa:
++ device_remove_file(&pdev->dev, &dev_attr_batt_capacity);
+err_rem_charge:
+ device_remove_file(&pdev->dev, &dev_attr_batt_charge);
+err_exit:
@@ -399,6 +404,7 @@
+{
+ struct n810bm *bm = platform_get_drvdata(pdev);
+
++ retu_free_irq(RETU_INT_ADCS);
+ del_timer_sync(&bm->check_timer);
+ device_remove_file(&pdev->dev, &dev_attr_batt_capacity);
+ device_remove_file(&pdev->dev, &dev_attr_batt_charge);
@@ -432,8 +438,8 @@
+MODULE_DESCRIPTION("Nokia n810 battery management");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Michael Buesch");
---- linux-2.6.36-rc5.orig/drivers/cbus/retu.c
-+++ linux-2.6.36-rc5/drivers/cbus/retu.c
+--- linux-2.6.36-rc7.orig/drivers/cbus/retu.c
++++ linux-2.6.36-rc7/drivers/cbus/retu.c
@@ -85,10 +85,10 @@ int retu_read_reg(int reg)
*
* This function writes a value to the specified register
@@ -447,9 +453,17 @@
}
void retu_set_clear_reg_bits(int reg, u16 set, u16 clear)
---- linux-2.6.36-rc5.orig/drivers/cbus/retu.h
-+++ linux-2.6.36-rc5/drivers/cbus/retu.h
-@@ -58,7 +58,7 @@
+--- linux-2.6.36-rc7.orig/drivers/cbus/retu.h
++++ linux-2.6.36-rc7/drivers/cbus/retu.h
+@@ -39,6 +39,7 @@
+ #define RETU_REG_CC2 0x0e /* Common control register 2 */
+ #define RETU_REG_CTRL_CLR 0x0f /* Regulator clear register */
+ #define RETU_REG_CTRL_SET 0x10 /* Regulator set register */
++#define RETU_REG_UNK1 0x14 /* 0x1000 is set when charger is plugged in */
+ #define RETU_REG_STATUS 0x16 /* Status register */
+ #define RETU_REG_WATCHDOG 0x17 /* Watchdog register */
+ #define RETU_REG_AUDTXR 0x18 /* Audio Codec Tx register */
+@@ -58,7 +59,7 @@
#define MAX_RETU_IRQ_HANDLERS 16
int retu_read_reg(int reg);
@@ -458,8 +472,8 @@
void retu_set_clear_reg_bits(int reg, u16 set, u16 clear);
int retu_read_adc(int channel);
int retu_request_irq(int id, void *irq_handler, unsigned long arg, char *name);
---- linux-2.6.36-rc5.orig/arch/arm/mach-omap2/board-n8x0.c
-+++ linux-2.6.36-rc5/arch/arm/mach-omap2/board-n8x0.c
+--- linux-2.6.36-rc7.orig/arch/arm/mach-omap2/board-n8x0.c
++++ linux-2.6.36-rc7/arch/arm/mach-omap2/board-n8x0.c
@@ -906,6 +906,17 @@ static void __init n8x0_gpio_switches_in
ARRAY_SIZE(n8x0_gpio_switches));
}
@@ -487,3 +501,139 @@
}
MACHINE_START(NOKIA_N800, "Nokia N800")
+--- /dev/null
++++ linux-2.6.36-rc7/drivers/cbus/lipocharge.c
+@@ -0,0 +1,63 @@
++/*
++ * Generic LIPO battery charger
++ *
++ * Copyright (c) 2010 Michael Buesch <mb@bu3sch.de>
++ *
++ * 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.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ */
++
++#include "lipocharge.h"
++
++#include <linux/slab.h>
++
++
++static void lipocharge_timer(unsigned long data)
++{
++ struct lipocharge *c = (struct lipocharge *)data;
++
++ spin_lock(&c->lock);
++ //TODO
++ spin_unlock(&c->lock);
++}
++
++struct lipocharge * lipocharge_alloc(gfp_t gfp)
++{
++ struct lipocharge *c;
++
++ c = kzalloc(sizeof(*c), gfp);
++ if (!c)
++ return NULL;
++ spin_lock_init(&c->lock);
++ setup_timer(&c->timer, lipocharge_timer, (unsigned long)c);
++
++ return c;
++}
++
++void lipocharge_free(struct lipocharge *c)
++{
++ kfree(c);
++}
++
++int lipocharge_start(struct lipocharge *c)
++{
++ if (!c->set_current || !c->get_voltage ||
++ !c->finished || !c->emergency)
++ return -EINVAL;
++ if (!c->top_voltage || c->top_voltage > 4200)
++ return -EINVAL;
++ //TODO
++}
++
++void lipocharge_stop(struct lipocharge *c)
++{
++ del_timer_sync(&c->timer);
++ //TODO
++}
+--- /dev/null
++++ linux-2.6.36-rc7/drivers/cbus/lipocharge.h
+@@ -0,0 +1,50 @@
++#ifndef LIPOCHARGE_H_
++#define LIPOCHARGE_H_
++
++#include <linux/timer.h>
++#include <linux/spinlock.h>
++
++
++#define LIPORATE(a,b) (((a) * 1000) + (b))
++#define LIPORATE_1C LIPORATE(1,0) /* 1C */
++#define LIPORATE_p8C LIPORATE(0,8) /* 0.8C */
++
++/** struct lipocharge - A generic LIPO charger
++ *
++ * @capacity: Battery capacity in mAh.
++ * @rate: Charge rate.
++ * @top_voltage: Fully charged voltage, in mV.
++ *
++ * @set_current: Set the charge current, in mA.
++ * @get_voltage: Get the battery voltage, in mV.
++ *
++ * @emergency: Something went wrong. Force shutdown.
++ *
++ * @priv: opaque pointer.
++ */
++struct lipocharge
++{
++ unsigned int capacity;
++ unsigned int rate;
++ unsigned int top_voltage;
++
++ int (*set_current)(struct lipocharge *c, unsigned int ma);
++ int (*get_voltage)(struct lipocharge *c, unsigned int *mv);
++
++ void (*finished)(struct lipocharge *c);
++ void (*emergency)(struct lipocharge *c);
++
++ void *priv;
++
++ /* internal */
++ spinlock_t lock;
++ struct timer_list timer;
++};
++
++struct lipocharge * lipocharge_alloc(gfp_t gfp);
++void lipocharge_free(struct lipocharge *c);
++
++int lipocharge_start(struct lipocharge *c);
++void lipocharge_stop(struct lipocharge *c);
++
++#endif /* LIPOCHARGE_H_ */
+--- linux-2.6.36-rc7.orig/drivers/cbus/tahvo.h
++++ linux-2.6.36-rc7/drivers/cbus/tahvo.h
+@@ -30,8 +30,14 @@
+ #define TAHVO_REG_IDR 0x01 /* Interrupt ID */
+ #define TAHVO_REG_IDSR 0x02 /* Interrupt status */
+ #define TAHVO_REG_IMR 0x03 /* Interrupt mask */
++#define TAHVO_REG_CHGCURR 0x04 /* Charge current control (8-bit) */
+ #define TAHVO_REG_LEDPWMR 0x05 /* LED PWM */
+ #define TAHVO_REG_USBR 0x06 /* USB control */
++#define TAHVO_REG_CHGCTL 0x08 /* Charge control register */
++#define TAHVO_REG_CHGCTL_EN 0x0001 /* Global charge enable */
++#define TAHVO_REG_CHGCTL2 0x0c /* Charge control register 2 */
++#define TAHVO_REG_BATCURR 0x0d /* Battery (dis)charge current (signed 16-bit) */
++
+ #define TAHVO_REG_MAX 0x0d
+
+ /* Interrupt sources */
--
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