[PATCH v5 4/5] Documentation: atmel-pmc: add DT bindings for fast startup

Wenyou Yang
2016-03-16T07:06:28Z

Add DT bindings to configurate the PMC_FSMR and PMC_FSPR registers
to trigger a fast restart signal to PMC.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Acked-by: Rob Herring <robh+dt@kernel.org>
---

Changes in v5:
- due to the DT property expression change, update the binding
document.

Changes in v4:
- add Acked-by tag.

Changes in v3:
- update the property description.

Changes in v2:
- change the property name and property description.

.../devicetree/bindings/arm/atmel-pmc.txt | 52 ++++++++++++++++++++
1 file changed, 52 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/atmel-pmc.txt b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
index 795cc78..76fdc66 100644
--- a/Documentation/devicetree/bindings/arm/atmel-pmc.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
@@ -12,3 +12,55 @@ Examples:
compatible = "atmel,at91rm9200-pmc";
reg = <0xfffffc00 0x100>;
};
+
+PMC Fast Startup Signals
+
+The PMC Fast Start Signals are used as the wake up source to trigger the PMC
+to wake up the system from the ULP1 mode.
+
+required properties:
+- compatible: should be "atmel,sama5d2-pmc-fast-startup".
+
+optional properties:
+- atmel,wakeup-rtc-timer: boolean to enable RTC alarm wake-up.
+- atmel,wakeup-usb-resume: boolean to enable USB resume wake-up.
+- atmel,wakeup-sdmmc-cd: boolean to enable SDMMC card detect wake-up.
+- atmel,wakeup-rxlp-match: boolean to enable RXLP matching condition wake-up.
+- atmel,wakeup-acc-comparison: boolean to enable ACC comparison wake-up.
+
+The node contains child nodes for each wake-up input pin that the platform uses.
+
+Input nodes
+
+Required properties:
+- reg: should contain the wake-up input index [0 - 10], to enable
+ the corresponding wake-up input.
+
+Optional properties:
+- atmel,wakeup-active-high: boolean to declare the corresponding wake-up
+ input described by the child be active high.
+ The default is to be active low.
+
+Example:
+
+ pmc: pmc@f0014000 {
+ compatible = "atmel,sama5d2-pmc";
+ reg = <0xf0014000 0x160>;
+
+ pmc_fast_restart {
+ compatible = "atmel,sama5d2-pmc-fast-startup";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ atmel,wakeup-rtc-timer;
+
+ wkpin: input@0 {
+ reg = <0>;
+ };
+
+ gmac_wol: input@10 {
+ reg = <10>;
+ atmel,wakeup-active-high;
+ };
+ };
+ };
--
1.7.9.5