Messages in this thread Patch in this message | | | Date | Tue, 30 Jun 2009 02:17:30 -0400 | From | Andres Salomon <> | Subject | [PATCH 5/5] power_supply: add a charge_type status to the api, and use it for olpc driver |
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This adds a new sysfs file called 'charge_type' which displays the type of charging (n/a, trickle charge, slow charge, or fast charging). This allows things like battery diagnostics to determine what the battery/EC is doing without resorting to changing the 'status' sysfs output.
Signed-off-by: Andres Salomon <dilinger@collabora.co.uk> --- Documentation/power/power_supply_class.txt | 4 ++++ drivers/power/olpc_battery.c | 9 +++++++++ drivers/power/power_supply_sysfs.c | 6 ++++++ include/linux/power_supply.h | 8 ++++++++ 4 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/Documentation/power/power_supply_class.txt b/Documentation/power/power_supply_class.txt index 709d955..bd53ebd 100644 --- a/Documentation/power/power_supply_class.txt +++ b/Documentation/power/power_supply_class.txt @@ -76,6 +76,10 @@ STATUS - this attribute represents operating status (charging, full, discharging (i.e. powering a load), etc.). This corresponds to BATTERY_STATUS_* values, as defined in battery.h. +CHARGE_TYPE - batteries can typically charge at different rates. +This defines trickle, slow, and fast charges. For batteries that +are already charged or discharging, 'n/a' can be displayed. + HEALTH - represents health of the battery, values corresponds to POWER_SUPPLY_HEALTH_*, defined in battery.h. diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c index af17051..10cb875 100644 --- a/drivers/power/olpc_battery.c +++ b/drivers/power/olpc_battery.c @@ -230,6 +230,14 @@ static int olpc_bat_get_property(struct power_supply *psy, if (ret) return ret; break; + case POWER_SUPPLY_PROP_CHARGE_TYPE: + if (ec_byte & BAT_STAT_TRICKLE) + val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; + else if (ec_byte & BAT_STAT_CHARGING) + val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; + else + val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE; + break; case POWER_SUPPLY_PROP_PRESENT: val->intval = !!(ec_byte & (BAT_STAT_PRESENT|BAT_STAT_TRICKLE)); break; @@ -321,6 +329,7 @@ static int olpc_bat_get_property(struct power_supply *psy, static enum power_supply_property olpc_bat_props[] = { POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_CHARGE_TYPE, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_TECHNOLOGY, diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c index d30e591..3e0f228 100644 --- a/drivers/power/power_supply_sysfs.c +++ b/drivers/power/power_supply_sysfs.c @@ -43,6 +43,9 @@ static ssize_t power_supply_show_property(struct device *dev, static char *status_text[] = { "Unknown", "Charging", "Discharging", "Not charging", "Full" }; + static char *charge_type[] = { + "N/A", "Trickle", "Slow", "Fast" + }; static char *health_text[] = { "Unknown", "Good", "Overheat", "Dead", "Over voltage", "Unspecified failure", "Cold", @@ -70,6 +73,8 @@ static ssize_t power_supply_show_property(struct device *dev, if (off == POWER_SUPPLY_PROP_STATUS) return sprintf(buf, "%s\n", status_text[value.intval]); + else if (off == POWER_SUPPLY_PROP_CHARGE_TYPE) + return sprintf(buf, "%s\n", charge_type[value.intval]); else if (off == POWER_SUPPLY_PROP_HEALTH) return sprintf(buf, "%s\n", health_text[value.intval]); else if (off == POWER_SUPPLY_PROP_TECHNOLOGY) @@ -87,6 +92,7 @@ static ssize_t power_supply_show_property(struct device *dev, static struct device_attribute power_supply_attrs[] = { /* Properties of type `int' */ POWER_SUPPLY_ATTR(status), + POWER_SUPPLY_ATTR(charge_type), POWER_SUPPLY_ATTR(health), POWER_SUPPLY_ATTR(present), POWER_SUPPLY_ATTR(online), diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h index 0ab6aa1..d0be97c 100644 --- a/include/linux/power_supply.h +++ b/include/linux/power_supply.h @@ -39,6 +39,13 @@ enum { }; enum { + POWER_SUPPLY_CHARGE_TYPE_NONE = 0, + POWER_SUPPLY_CHARGE_TYPE_TRICKLE, + POWER_SUPPLY_CHARGE_TYPE_SLOW, + POWER_SUPPLY_CHARGE_TYPE_FAST, +}; + +enum { POWER_SUPPLY_HEALTH_UNKNOWN = 0, POWER_SUPPLY_HEALTH_GOOD, POWER_SUPPLY_HEALTH_OVERHEAT, @@ -70,6 +77,7 @@ enum { enum power_supply_property { /* Properties of type `int' */ POWER_SUPPLY_PROP_STATUS = 0, + POWER_SUPPLY_PROP_CHARGE_TYPE, POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_ONLINE, -- 1.5.6.5
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