linux-kernel - [PATCH 3/4] power: supply: power_supply_core: add constant-charge-current optional property

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Date:   Thu, 11 May 2017 15:42:19 +0200
From:   Quentin Schulz <quentin.schulz@...e-electrons.com>
To:     sre@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        wens@...e.org
Cc:     Quentin Schulz <quentin.schulz@...e-electrons.com>,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, liam@...workimprov.net,
        thomas.petazzoni@...e-electrons.com, linux-sunxi@...glegroups.com
Subject: [PATCH 3/4] power: supply: power_supply_core: add constant-charge-current optional property

This adds the constant-charge-current property to the list of optional
properties for the battery.

The constant charge current is critical for batteries as they can't
handle all charge currents.

Signed-off-by: Quentin Schulz <quentin.schulz@...e-electrons.com>
---
 drivers/power/supply/power_supply_core.c | 3 +++
 include/linux/power_supply.h             | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index 5019bdee0f0b..23887739c95c 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c
@@ -508,6 +508,7 @@ int power_supply_get_battery_info(struct power_supply *psy,
 	info->energy_full_design_uwh = -EINVAL;
 	info->charge_full_design_uah = -EINVAL;
 	info->voltage_min_design_uv  = -EINVAL;
+	info->constant_charge_current_max_ua  = -EINVAL;
 
 	if (!psy->of_node) {
 		dev_warn(&psy->dev, "%s currently only supports devicetree\n",
@@ -537,6 +538,8 @@ int power_supply_get_battery_info(struct power_supply *psy,
 			     &info->charge_full_design_uah);
 	of_property_read_u32(battery_np, "voltage-min-design-microvolt",
 			     &info->voltage_min_design_uv);
+	of_property_read_u32(battery_np, "constant-charge-current-max-microamp",
+			     &info->constant_charge_current_max_ua);
 
 	return 0;
 }
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index e84f1d31d987..6f9c28187caf 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -301,6 +301,7 @@ struct power_supply_battery_info {
 	int energy_full_design_uwh;	/* microWatt-hours */
 	int charge_full_design_uah;	/* microAmp-hours */
 	int voltage_min_design_uv;	/* microVolts */
+	int constant_charge_current_max_ua;		/* microAmps */
 };
 
 extern struct atomic_notifier_head power_supply_notifier;
-- 
2.11.0