Extend the bq24257 charger's device tree documentation to cover the
bq24250 and bq24251 devices as well feature additions.
Signed-off-by: Andreas Dannenberg <dannenberg@xxxxxx>
---
.../devicetree/bindings/power/bq24257.txt | 59 ++++++++++++++++++++--
1 file changed, 54 insertions(+), 5 deletions(-)
diff --git a/Documentation/devicetree/bindings/power/bq24257.txt b/Documentation/devicetree/bindings/power/bq24257.txt
index 5c9d394..4a88c96 100644
--- a/Documentation/devicetree/bindings/power/bq24257.txt
+++ b/Documentation/devicetree/bindings/power/bq24257.txt
@@ -1,21 +1,70 @@
-Binding for TI bq24257 Li-Ion Charger
+Binding for TI bq24250/bq24251/bq24257 Li-Ion Charger
Required properties:
- compatible: Should contain one of the following:
+ * "ti,bq24250"
+ * "ti,bq24251"
* "ti,bq24257"
-- reg: integer, i2c address of the device.
+- reg: integer, i2c address of the device.
+- stat-gpios: GPIO used for the devices STAT_IN pin. Alternatively the pin can
+ also be defined through the standard interrupt definition properties (see
+ optional properties section below). Only use one method.
- ti,battery-regulation-voltage: integer, maximum charging voltage in uV.
-- ti,charge-current: integer, maximum charging current in uA.
-- ti,termination-current: integer, charge will be terminated when current in
- constant-voltage phase drops below this value (in uA).
+- ti,charge-current: integer, maximum charging current in uA.
+- ti,termination-current: integer, charge will be terminated when current in
+ constant-voltage phase drops below this value (in uA).
+
+Optional properties:
+- pg-gpios: GPIO used for connecting the bq2425x device PG (Power Good) pin.
+ This pin is not available on all devices however it should be used if
+ possible as this is the recommended way to obtain the charger's input PG
+ state. If this pin is not specified a software-based approach for PG
+ detection is used.
+- ti,current-limit: The maximum current to be drawn from the charger's input
+ (in uA). If this property is not specified a USB D+/D- signal based charger
+ type detection is used (if available) and the input limit current is set
+ accordingly. If the D+/D- based detection is not available on a given device
+ a default of 500,000 is used (=500mA).
+- ti,ovp-voltage: Configures the over voltage protection voltage (in uV). If
+ not specified a default of 6,5000,000 (=6.5V) is used.
+- ti,in-dpm-voltage: Configures the threshold input voltage for the dynamic
+ power path management (in uV). If not specified a default of 4,360,000
+ (=4.36V) is used.
+- ti,safety-timer-2x-enable: If this property is set to 1 the device's safety
+ timer is extended (slowed down) by a factor of two. Setting this property
+ to 0 or not providing it will leave the safety timer at its default
+ setting.
+- interrupt-parent: Should be the phandle for the interrupt controller. Use in
+ conjunction with "interrupts" and only in case "stat-gpios" is not used.
+- interrupts: Interrupt mapping for GPIO IRQ (configure for both edges). Use in
+ conjunction with "interrupt-parent" and only in case "stat-gpios" is not
+ used.
Example:
bq24257 {
compatible = "ti,bq24257";
reg = <0x6a>;
+ stat-gpios = <&gpio1 16 GPIO_ACTIVE_HIGH>;
+ pg-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
ti,battery-regulation-voltage = <4200000>;
ti,charge-current = <1000000>;
ti,termination-current = <50000>;
};
+
+Example:
+
+bq24250 {
+ compatible = "ti,bq24250";
+ reg = <0x6a>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <16 IRQ_TYPE_EDGE_BOTH>;
+
+ ti,battery-regulation-voltage = <4200000>;
+ ti,charge-current = <500000>;
+ ti,termination-current = <50000>;
+ ti,current-limit = <900000>;
+ ti,ovp-voltage = <9500000>;
+ ti,in-dpm-voltage = <4440000>;
+};
--
1.9.1
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