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Date: Mon, 31 Jan 2011 23:39:41 +0100
From: Pali Rohár <pali.rohar@...il.com>
To: Lars-Peter Clausen <lars@...afoo.de>
Cc: Anton Vorontsov <cbouatmailru@...il.com>,
Grazvydas Ignotas <notasas@...il.com>,
linux-kernel@...r.kernel.org
Subject: Re: Fwd: [PATCH] bq27x00_battery: Add new properties
This patch add support for reporting properties
POWER_SUPPLY_PROP_CHARGE_NOW, POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_COUNTER, POWER_SUPPLY_PROP_ENERGY_NOW in
module bq27x00_battery.
Signed-off-by: Pali Rohár <pali.rohar@...il.com>
Tested-by: Pali Rohár <pali.rohar@...il.com>
--- a/drivers/power/bq27x00_battery.c 2011-01-31 17:45:01.000000000 +0100
+++ b/drivers/power/bq27x00_battery.c 2011-01-31 18:43:16.000000000 +0100
@@ -4,6 +4,11 @@
* Copyright (C) 2008 Rodolfo Giometti <giometti@...ux.it>
* Copyright (C) 2008 Eurotech S.p.A. <info@...otech.it>
*
+ * Support for reporting properties: POWER_SUPPLY_PROP_CHARGE_NOW,
+ * POWER_SUPPLY_PROP_CHARGE_FULL, POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+ * POWER_SUPPLY_PROP_CHARGE_COUNTER, POWER_SUPPLY_PROP_ENERGY_NOW
+ * Copyright (C) 2011 Pali Rohár <pali.rohar@...il.com>
+ *
* Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc.
*
* This package is free software; you can redistribute it and/or modify
@@ -15,6 +20,13 @@
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
*/
+
+/*
+ * Datasheets:
+ * http://focus.ti.com/docs/prod/folders/print/bq27000.html
+ * http://focus.ti.com/docs/prod/folders/print/bq27500.html
+ */
+
#include <linux/module.h>
#include <linux/param.h>
#include <linux/jiffies.h>
@@ -27,7 +39,7 @@
#include <linux/slab.h>
#include <asm/unaligned.h>
-#define DRIVER_VERSION "1.1.0"
+#define DRIVER_VERSION "1.2.0"
#define BQ27x00_REG_TEMP 0x06
#define BQ27x00_REG_VOLT 0x08
@@ -36,12 +48,19 @@
#define BQ27x00_REG_TTE 0x16
#define BQ27x00_REG_TTF 0x18
#define BQ27x00_REG_TTECP 0x26
+#define BQ27x00_REG_NAC 0x0C /* Nominal available capaciy */
+#define BQ27x00_REG_LMD 0x12 /* Last measured discharge */
+#define BQ27x00_REG_CYCT 0x2A /* Cycle count total */
+#define BQ27x00_REG_AE 0x22 /* Available enery */
#define BQ27000_RS 20 /* Resistor sense */
#define BQ27000_REG_RSOC 0x0B /* Relative State-of-Charge */
+#define BQ27000_REG_ILMD 0x76 /* Initial last measured discharge */
#define BQ27000_FLAG_CHGS BIT(7)
+#define BQ27000_FLAG_FC BIT(5)
#define BQ27500_REG_SOC 0x2C
+#define BQ27500_REG_DCAP 0x3C /* Design capacity */
#define BQ27500_FLAG_DSC BIT(0)
#define BQ27500_FLAG_FC BIT(9)
@@ -75,6 +94,11 @@ static enum power_supply_property bq27x0
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_CHARGE_NOW,
+ POWER_SUPPLY_PROP_CHARGE_FULL,
+ POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+ POWER_SUPPLY_PROP_CHARGE_COUNTER,
+ POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
@@ -188,6 +212,119 @@ static int bq27x00_battery_rsoc(struct b
return rsoc;
}
+/*
+ * Return the battery Nominal available capaciy in µAh
+ * Or < 0 if something fails.
+ */
+static int bq27x00_battery_nac(struct bq27x00_device_info *di)
+{
+ int ret;
+ int nac = 0;
+
+ ret = bq27x00_read(BQ27x00_REG_NAC, &nac, 0, di);
+ if (ret) {
+ dev_err(di->dev, "error reading nominal available capacity\n");
+ return ret;
+ }
+
+ if (di->chip == BQ27500)
+ nac *= 1000;
+ else
+ nac = nac * 3570 / BQ27000_RS;
+
+ return nac;
+}
+
+/*
+ * Return the battery Last measured discharge in µAh
+ * Or < 0 if something fails.
+ */
+static int bq27x00_battery_lmd(struct bq27x00_device_info *di)
+{
+ int ret;
+ int lmd = 0;
+
+ ret = bq27x00_read(BQ27x00_REG_LMD, &lmd, 0, di);
+ if (ret) {
+ dev_err(di->dev, "error reading last measured discharge\n");
+ return ret;
+ }
+
+ if (di->chip == BQ27500)
+ lmd *= 1000;
+ else
+ lmd = lmd * 3570 / BQ27000_RS;
+
+ return lmd;
+}
+
+/*
+ * Return the battery Initial last measured discharge in µAh
+ * Or < 0 if something fails.
+ */
+static int bq27x00_battery_ilmd(struct bq27x00_device_info *di)
+{
+ int ret;
+ int ilmd = 0;
+
+ if (di->chip == BQ27500)
+ ret = bq27x00_read(BQ27500_REG_DCAP, &ilmd, 0, di);
+ else
+ ret = bq27x00_read(BQ27000_REG_ILMD, &ilmd, 0, di);
+ if (ret) {
+ dev_err(di->dev, "error reading initial last measured discharge\n");
+ return ret;
+ }
+
+ if (di->chip == BQ27500)
+ ilmd *= 1000;
+ else
+ ilmd = ilmd * 256 * 3570 / BQ27000_RS;
+
+ return ilmd;
+}
+
+/*
+ * Return the battery Cycle count total
+ * Or < 0 if something fails.
+ */
+static int bq27x00_battery_cyct(struct bq27x00_device_info *di)
+{
+ int ret;
+ int cyct = 0;
+
+ ret = bq27x00_read(BQ27x00_REG_CYCT, &cyct, 0, di);
+ if (ret) {
+ dev_err(di->dev, "error reading cycle count total\n");
+ return ret;
+ }
+
+ return cyct;
+}
+
+/*
+ * Return the battery Available energy in µWh
+ * Or < 0 if something fails.
+ */
+static int bq27x00_battery_energy(struct bq27x00_device_info *di)
+{
+ int ret;
+ int ae = 0;
+
+ ret = bq27x00_read(BQ27x00_REG_LMD, &ae, 0, di);
+ if (ret) {
+ dev_err(di->dev, "error reading available energy\n");
+ return ret;
+ }
+
+ if (di->chip == BQ27500)
+ ae *= 1000;
+ else
+ ae = ae * 29200 / BQ27000_RS;
+
+ return ae;
+}
+
static int bq27x00_battery_status(struct bq27x00_device_info *di,
union power_supply_propval *val)
{
@@ -209,7 +346,9 @@ static int bq27x00_battery_status(struct
else
status = POWER_SUPPLY_STATUS_CHARGING;
} else {
- if (flags & BQ27000_FLAG_CHGS)
+ if (flags & BQ27000_FLAG_FC)
+ status = POWER_SUPPLY_STATUS_FULL;
+ else if (flags & BQ27000_FLAG_CHGS)
status = POWER_SUPPLY_STATUS_CHARGING;
else
status = POWER_SUPPLY_STATUS_DISCHARGING;
@@ -268,6 +407,21 @@ static int bq27x00_battery_get_property(
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = bq27x00_battery_rsoc(di);
break;
+ case POWER_SUPPLY_PROP_CHARGE_NOW:
+ val->intval = bq27x00_battery_nac(di);
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_FULL:
+ val->intval = bq27x00_battery_lmd(di);
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+ val->intval = bq27x00_battery_ilmd(di);
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_COUNTER:
+ val->intval = bq27x00_battery_cyct(di);
+ break;
+ case POWER_SUPPLY_PROP_ENERGY_NOW:
+ val->intval = bq27x00_battery_energy(di);
+ break;
case POWER_SUPPLY_PROP_TEMP:
val->intval = bq27x00_battery_temperature(di);
break;
--
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