[v2,16/25] dt-bindings: power: supply: add AXP20X/AXP22X battery DT binding

Message ID 20170127085458.18270-17-quentin.schulz@free-electrons.com
State New
Headers show
Series
  • add support for AXP20X and AXP22X power supply drivers
Related show

Commit Message

Quentin Schulz Jan. 27, 2017, 8:54 a.m.
The X-Powers AXP20X and AXP22X PMICs can have a battery as power supply.

This patch adds the DT binding documentation for the battery power
supply which gets various data from the PMIC, such as the battery status
(charging, discharging, full, dead), current max limit, current current,
battery capacity (in percentage), voltage max and min limits, current
voltage and battery capacity (in Ah).

Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>

---

v2:
 - changed DT node name from ac_power_supply to ac-power-supply,
 - removed io-channels and io-channel-names from DT (the IIO mapping is
 done in the IIO ADC driver now),
 - added x-powers,constant-charge-current property to set the maximal
 default constant current charge of the battery,

 .../bindings/power/supply/axp20x_battery.txt       | 25 ++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/supply/axp20x_battery.txt

-- 
2.9.3


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Comments

Sebastian Reichel Jan. 29, 2017, 4:47 p.m. | #1
Hi,

On Fri, Jan 27, 2017 at 09:54:49AM +0100, Quentin Schulz wrote:
>  - added x-powers,constant-charge-current property to set the

>  maximal default constant current charge of the battery,


Since this is information about the battery and not the fuel-gauge,
it should use the WIP "framework" for information about batteries.

Have a look at the following patchset:

http://marc.info/?l=linux-pm&m=148411561025684&w=2

-- Sebastian
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diff --git a/Documentation/devicetree/bindings/power/supply/axp20x_battery.txt b/Documentation/devicetree/bindings/power/supply/axp20x_battery.txt
new file mode 100644
index 0000000..6f7eff2
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/axp20x_battery.txt
@@ -0,0 +1,25 @@ 
+AXP20x and AXP22x battery power supply
+
+Required Properties:
+ - compatible, one of:
+			"x-powers,axp209-battery-power-supply"
+			"x-powers,axp221-battery-power-supply"
+
+Optional properties:
+ - x-powers,constant-charge-current: its value in uA gives the PMIC the default
+ maximal allowed value for the constant charge current of the battery.
+
+This node is a subnode of the axp20x/axp22x PMIC.
+
+The AXP20X and AXP22X can read the battery voltage, charge and discharge
+currents of the battery by reading ADC channels from the AXP20X/AXP22X
+ADC.
+
+Example:
+
+&axp209 {
+	battery_power_supply: battery-power-supply {
+		compatible = "x-powers,axp209-battery-power-supply";
+		x-powers,constant-charge-current = <600000>;
+	}
+};