Thread (71 messages) 71 messages, 5 authors, 2019-11-14

Re: [PATCH v3 2/5] dt-bindings: power: supply: Max17040: Add low level SOC alert threshold

From: Krzysztof Kozlowski <krzk@kernel.org>
Date: 2019-05-29 14:40:30
Also in: linux-pm, lkml

On Mon, 27 May 2019 at 04:45, Matheus Castello [off-list ref] wrote:
quoted hunk ↗ jump to hunk
For configure low level state of charge threshold alert signaled from
max17040 we add "maxim,alert-low-soc-level" property.

Signed-off-by: Matheus Castello <matheus@castello.eng.br>
---
 .../power/supply/max17040_battery.txt         | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/supply/max17040_battery.txt
diff --git a/Documentation/devicetree/bindings/power/supply/max17040_battery.txt b/Documentation/devicetree/bindings/power/supply/max17040_battery.txt
new file mode 100644
index 000000000000..a13e8d50ff7b
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/max17040_battery.txt
@@ -0,0 +1,28 @@
+max17040_battery
+~~~~~~~~~~~~~~~~
+
+Required properties :
+ - compatible : "maxim,max17040" or "maxim,max77836-battery"
+
+Optional properties :
+- maxim,alert-low-soc-level :  The alert threshold that sets the state of
+                               charge level (%) where an interrupt is
+                               generated. Can be configured from 1 up to 32
+                               (%). If skipped the power up default value of
+                               4 (%) will be used.
+- interrupts :                         Interrupt line see Documentation/devicetree/
+                               bindings/interrupt-controller/interrupts.txt
Based on driver's behavior, I understand that these two properties
come in pair so maxim,alert-low-soc-level (or its default value) will
be used if and only if interrupts property is present. Maybe mention
this? In general looks fine to me:
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>

Best regards,
Krzysztof
+- wakeup-source :              This device has wakeup capabilities. Use this
+                               property to use alert low SOC level interrupt
+                               as wake up source.
+
+Example:
+
+       battery-fuel-gauge@36 {
+               compatible = "maxim,max17040";
+               reg = <0x36>;
+               maxim,alert-low-soc-level = <10>;
+               interrupt-parent = <&gpio7>;
+               interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
+               wakeup-source;
+       };
--
2.20.1
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