linux-kernel - [PATCH v2 1/2] dt-bindings: regulator: extend tps65218 bindings

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Date:   Thu, 3 Jan 2019 14:47:05 +0100
From:   Christian Hohnstaedt <Christian.Hohnstaedt@...o.com>
To:     "J, KEERTHY" <j-keerthy@...com>
CC:     Lee Jones <lee.jones@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "Rob Herring" <robh+dt@...nel.org>,
        Tony Lindgren <tony@...mide.com>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-omap@...r.kernel.org>
Subject: [PATCH v2 1/2] dt-bindings: regulator: extend tps65218 bindings

Add input voltage configuration options

Signed-off-by: Christian Hohnstaedt <Christian.Hohnstaedt@...o.com>
---
 .../devicetree/bindings/regulator/tps65218.txt     | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/Documentation/devicetree/bindings/regulator/tps65218.txt b/Documentation/devicetree/bindings/regulator/tps65218.txt
index 02f0e9b..982597d 100644
--- a/Documentation/devicetree/bindings/regulator/tps65218.txt
+++ b/Documentation/devicetree/bindings/regulator/tps65218.txt
@@ -16,12 +16,34 @@ Required properties:
   regulator-dcdc5, regulator-dcdc6, regulator-ldo1, regulator-ls3.
   Each regulator is defined using the standard binding for regulators.
 
+Optional properties:
+  If any of these properties is absent then the corresponding setting will be
+  untouched.
+- ti,strict-supply-voltage-supervision: Set/Reset STRICT flag in CONFIG1.
+  The supervisor has two modes of operation, controlled by the STRICT bit.
+  With the STRICT bit set to 0, all five rails are monitored for under-voltage
+  only with relaxed thresholds and deglitch times.
+  With the STRCT bit set to 1, all five rails are monitored for under-voltage
+  and over-voltage with tight limits and short deglitch times.
+- ti,under-voltage-limit-microvolt: Configures UVLO in CONFIG1.
+  Valid values are: 2750000, 2950000, 3250000, 3350000
+- ti,under-voltage-hyst-microvolt: Select 200mV or 400mV UVLOHYS in CONFIG2
+  Power rails are only enabled if the input voltage measured at the IN_BIAS pin
+  is greater than the under-voltage lockout threshold plus hysteresis
+  (UVLO + UVLOHYS). Once the input voltage rises above this level,
+  the input voltage may drop to the UVLO level before the PMIC shuts down.
+  UVLO is deglitched by 5 ms on rising and falling edge.
+
 Example:
 tps65218: tps65218@24 {
 	reg = <0x24>;
 	compatible = "ti,tps65218";
 	interrupts = <GIC_SPI 7 IRQ_TYPE_NONE>; /* NMIn */
 	interrupt-controller;
+	ti,strict-supply-voltage-supervision = <1>;
+	ti,under-voltage-hyst-microvolt = <400000>;
+	ti,under-voltage-limit-microvolt = <3350000>;
+
 	#interrupt-cells = <2>;
 
 	dcdc1: regulator-dcdc1 {
-- 
2.7.4