linux-kernel - [PATCH] power_supply: Add new power supply properties CHARGE_CURRENT/VOLTAGE

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Date:	Mon, 30 Jul 2012 10:38:02 +0530
From:	Ramakrishna Pallala <ramakrishna.pallala@...el.com>
To:	linux-kernel@...r.kernel.org
Cc:	Anton Vorontsov <cbouatmailru@...il.com>,
	Anton Vorontsov <anton.vorontsov@...aro.org>,
	Ramakrishna Pallala <ramakrishna.pallala@...el.com>
Subject: [PATCH] power_supply: Add new power supply properties CHARGE_CURRENT/VOLTAGE_MAX

There are different types of chargers avalibale like AC, Solar, USB, etc..
Even in USB we have different types SDP/DCP/CDP/ACA and all these
chargers have different o/p ratings. For example SDP supports only 500mA of
charge current whereas AC charger can support upto 8A or more.

Similarly batteries also come with charge current and voltage ratings and
these ratings vary depending on its capacity and the technology used.

This patch adds two new power supply properties CONSTANT_CHARGE_CURRENT_MAX and
CONSTANT_CHARGE_CURRENT_MAX.

Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@...el.com>
---
 Documentation/power/power_supply_class.txt |    4 ++++
 drivers/power/power_supply_sysfs.c         |    2 ++
 include/linux/power_supply.h               |    2 ++
 3 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/Documentation/power/power_supply_class.txt b/Documentation/power/power_supply_class.txt
index 272b122..db11122 100644
--- a/Documentation/power/power_supply_class.txt
+++ b/Documentation/power/power_supply_class.txt
@@ -115,8 +115,12 @@ be negative; there is no empty or full value.  It is only useful for
 relative, time-based measurements.
 
 CONSTANT_CHARGE_CURRENT - constant charge current programmed by charger.
+CONSTANT_CHARGE_CURRENT_MAX - maximum charge current supported by the
+power supply object.
 
 CONSTANT_CHARGE_VOLTAGE - constant charge voltage programmed by charger.
+CONSTANT_CHARGE_VOLTAGE_MAX - maximum charge voltage supported by the
+power supply object.
 
 ENERGY_FULL, ENERGY_EMPTY - same as above but for energy.
 
diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c
index 797639e..f10a402 100644
--- a/drivers/power/power_supply_sysfs.c
+++ b/drivers/power/power_supply_sysfs.c
@@ -161,7 +161,9 @@ static struct device_attribute power_supply_attrs[] = {
 	POWER_SUPPLY_ATTR(charge_avg),
 	POWER_SUPPLY_ATTR(charge_counter),
 	POWER_SUPPLY_ATTR(constant_charge_current),
+	POWER_SUPPLY_ATTR(constant_charge_current_max),
 	POWER_SUPPLY_ATTR(constant_charge_voltage),
+	POWER_SUPPLY_ATTR(constant_charge_voltage_max),
 	POWER_SUPPLY_ATTR(energy_full_design),
 	POWER_SUPPLY_ATTR(energy_empty_design),
 	POWER_SUPPLY_ATTR(energy_full),
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index e7edcb3..0c40c62 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -111,7 +111,9 @@ enum power_supply_property {
 	POWER_SUPPLY_PROP_CHARGE_AVG,
 	POWER_SUPPLY_PROP_CHARGE_COUNTER,
 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
 	POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
 	POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN,
 	POWER_SUPPLY_PROP_ENERGY_FULL,
-- 
1.7.0.4

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