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fc54b9bf15
(stable-branch of Openmoko) git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13613 3c298f89-4303-0410-b956-a3cf2f4a3e73
281 lines
8.9 KiB
Diff
281 lines
8.9 KiB
Diff
From 46159c9a3fba291d106625092fd62358548894e0 Mon Sep 17 00:00:00 2001
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From: Andy Green <andy@openmoko.com>
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Date: Tue, 22 Jul 2008 13:16:16 +0100
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Subject: [PATCH] fix-bq27000-charger-state-tracking.patch
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Charger trigger stuff goes and asks for POWER_SUPPLY_PROP_STATUS
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to figure out what the charger state is. But until now, we only
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reported there what we found out from HDQ, and the HDQ registers
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are not updated very often in the coulomb counter, it can be 4
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or more second lag before it tells us about what it experiences.
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When we react to USB insertion and only after 500ms debounce tell
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power_supply stuff that something changed, it most times will
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see old pre-USB-insertion state from bq27000 over HDQ at that time
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and will report it ain't charging, buggering up the LED trigger
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tracking.
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This patch maintains distance between bq27000 and pcf50633 by
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having platform callbacks in bq27000 that it can use to ask about
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definitive charger "online" presence and "activity", whether the
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charger says it is charging. If these callbacks are implemented
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(and we implement them in this patch up in mach_gta02.c) then
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this information is used in preference to what is found from
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HDQ.
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Result is if you set the LED trigger like this:
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echo bat-charging > /sys/devices/platform/gta02-led.0/leds/gta02-aux:red/trigger
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then it lights up properly on USB insertion now, goes away on
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removal properly, as as far as I saw, when charging stops too.
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Signed-off-by: Andy Green <andy@openmoko.com>
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---
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arch/arm/mach-s3c2440/mach-gta02.c | 32 +++++++++++++++--
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drivers/power/bq27000_battery.c | 65 ++++++++++++++++++++++++-----------
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include/linux/bq27000_battery.h | 2 +
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3 files changed, 74 insertions(+), 25 deletions(-)
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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 59ba890..1fcd3fd 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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@@ -96,6 +96,9 @@ struct resume_dependency resume_dep_jbt_glamo;
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struct resume_dependency resume_dep_glamo_mci_pcf;
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+static int gta02_charger_online_status;
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+static int gta02_charger_active_status;
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+
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/* define FIQ IPC struct */
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/*
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* contains stuff FIQ ISR modifies and normal kernel code can see and use
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@@ -457,12 +460,25 @@ static struct s3c2410_uartcfg gta02_uartcfgs[] = {
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/* BQ27000 Battery */
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+static int gta02_get_charger_online_status(void)
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+{
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+ return gta02_charger_online_status;
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+}
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+
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+static int gta02_get_charger_active_status(void)
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+{
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+ return gta02_charger_active_status;
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+}
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+
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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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+ .get_charger_online_status = gta02_get_charger_online_status,
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+ .get_charger_active_status = gta02_get_charger_active_status
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};
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struct platform_device bq27000_battery_device = {
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@@ -481,12 +497,20 @@ static int pmu_callback(struct device *dev, unsigned int feature,
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switch (feature) {
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case PCF50633_FEAT_MBC:
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switch (event) {
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- case PMU_EVT_USB_INSERT:
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- case PMU_EVT_USB_REMOVE:
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case PMU_EVT_CHARGER_IDLE:
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+ gta02_charger_active_status = 0;
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+ break;
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case PMU_EVT_CHARGER_ACTIVE:
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- case PMU_EVT_INSERT: /* adapter */
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- case PMU_EVT_REMOVE: /* adapter */
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+ gta02_charger_active_status = 1;
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+ break;
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+ case PMU_EVT_USB_INSERT:
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+ gta02_charger_online_status = 1;
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+ break;
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+ case PMU_EVT_USB_REMOVE:
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+ gta02_charger_online_status = 0;
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+ break;
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+ case PMU_EVT_INSERT: /* adapter is unsused */
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+ case PMU_EVT_REMOVE: /* adapter is unused */
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break;
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default:
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break;
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diff --git a/drivers/power/bq27000_battery.c b/drivers/power/bq27000_battery.c
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index 4855d5a..7020608 100644
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--- a/drivers/power/bq27000_battery.c
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+++ b/drivers/power/bq27000_battery.c
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@@ -113,12 +113,7 @@ enum bq27000_status_flags {
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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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+ struct bq27000_platform_data *pdata;
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};
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/*
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@@ -136,16 +131,16 @@ static int hdq_read16(struct bq27000_device_info *di, int address)
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while (retries--) {
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- high = (di->hdq_read)(address + 1); /* high part */
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+ high = (di->pdata->hdq_read)(address + 1); /* high part */
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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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+ acc = (di->pdata->hdq_read)(address);
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if (acc < 0)
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return acc;
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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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+ if (high == (di->pdata->hdq_read)(address + 1))
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return (high << 8) | acc;
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}
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@@ -170,12 +165,36 @@ static int bq27000_battery_get_property(struct power_supply *psy,
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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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- if (!(di->hdq_initialized)())
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+ if (!(di->pdata->hdq_initialized)())
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return -EINVAL;
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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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+
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+ if (!di->pdata->get_charger_online_status)
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+ goto use_bat;
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+ if ((di->pdata->get_charger_online_status)()) {
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+ /*
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+ * charger is definitively present
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+ * we report our state in terms of what it says it
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+ * is doing
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+ */
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+ if (!di->pdata->get_charger_active_status)
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+ goto use_bat;
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+ if ((di->pdata->get_charger_active_status)())
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+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
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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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+use_bat:
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+ /*
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+ * either the charger is not connected, or the
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+ * platform doesn't give info about charger, use battery state
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+ * but... battery state can be out of date by 4 seconds or
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+ * so... use the platform callbacks if possible.
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+ */
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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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@@ -189,7 +208,7 @@ static int bq27000_battery_get_property(struct power_supply *psy,
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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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+ v = (di->pdata->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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@@ -205,7 +224,7 @@ static int bq27000_battery_get_property(struct power_supply *psy,
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val->intval = v * 1000;
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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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+ v = (di->pdata->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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@@ -215,13 +234,13 @@ static int bq27000_battery_get_property(struct power_supply *psy,
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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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+ val->intval = (v * n) / di->pdata->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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+ val->intval = (v * 3570) / di->pdata->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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@@ -235,12 +254,12 @@ static int bq27000_battery_get_property(struct power_supply *psy,
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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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+ val->intval = (di->pdata->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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+ v = (di->pdata->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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@@ -255,6 +274,12 @@ static int bq27000_battery_get_property(struct power_supply *psy,
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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_ONLINE:
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+ if (di->pdata->get_charger_online_status)
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+ val->intval = (di->pdata->get_charger_online_status)();
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+ else
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+ return -EINVAL;
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+ break;
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default:
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return -EINVAL;
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}
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@@ -272,7 +297,8 @@ static enum power_supply_property bq27000_battery_props[] = {
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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_CAPACITY
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+ POWER_SUPPLY_PROP_CAPACITY,
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+ POWER_SUPPLY_PROP_ONLINE
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};
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static int bq27000_battery_probe(struct platform_device *pdev)
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@@ -302,10 +328,7 @@ static int bq27000_battery_probe(struct platform_device *pdev)
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di->bat.external_power_changed =
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bq27000_battery_external_power_changed;
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di->bat.use_for_apm = 1;
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- di->hdq_read = pdata->hdq_read;
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- di->hdq_write = pdata->hdq_write;
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- di->rsense_mohms = pdata->rsense_mohms;
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- di->hdq_initialized = pdata->hdq_initialized;
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+ di->pdata = pdata;
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retval = power_supply_register(&pdev->dev, &di->bat);
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if (retval) {
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diff --git a/include/linux/bq27000_battery.h b/include/linux/bq27000_battery.h
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index fed4287..a617466 100644
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--- a/include/linux/bq27000_battery.h
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+++ b/include/linux/bq27000_battery.h
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@@ -9,6 +9,8 @@ struct bq27000_platform_data {
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int (*hdq_read)(int);
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int (*hdq_write)(int, u8);
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int (*hdq_initialized)(void);
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+ int (*get_charger_online_status)(void);
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+ int (*get_charger_active_status)(void);
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};
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#endif
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--
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1.5.6.5
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