linux-kernel - [PATCH V3 2/3] Documentation: dt-bindings: mfd: palmas: document optional wakeup IRQ

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1411067086-16613-3-git-send-email-nm@ti.com>
Date:	Thu, 18 Sep 2014 14:04:45 -0500
From:	Nishanth Menon <nm@...com>
To:	<lee.jones@...aro.org>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	Keerthy <j-keerthy@...com>, Mark Brown <broonie@...aro.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	<linux-omap@...r.kernel.org>, Tony Lindgren <tony@...mide.com>,
	<linux-arm-kernel@...ts.infradead.org>, Nishanth Menon <nm@...com>
Subject: [PATCH V3 2/3] Documentation: dt-bindings: mfd: palmas: document optional wakeup IRQ

With the recent pinctrl-single changes, SoCs such as OMAP family can
treat wake-up events from deeper low power states as interrupts.

This is usable when the wakeup from deeper low power states is
triggered by a different hardware mechanism tied to pinctrl compared
to the routine interrupt handling generating the reqular interrupt
events. This is usually done on SoCs where the routine interrupt
sources such as GPIO need to be disabled to be actually achieve low
power state and wakeup is triggered from pinctrl interrupt source.

Provide documentation example for the case where the system needs two
interrupt sources when SoC is in deep sleep(1 to exit from deep sleep,
and other from the module handling the actual event).

Signed-off-by: Nishanth Menon <nm@...com>
---
V3: no change
V2: http://marc.info/?l=linux-kernel&m=140995036418561&w=2

 Documentation/devicetree/bindings/mfd/palmas.txt |   20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/palmas.txt b/Documentation/devicetree/bindings/mfd/palmas.txt
index d193859..1c821d6 100644
--- a/Documentation/devicetree/bindings/mfd/palmas.txt
+++ b/Documentation/devicetree/bindings/mfd/palmas.txt
@@ -51,3 +51,23 @@ palmas@48 {
 		....
 	};
 }
+
+Example: With interrupts extended
+ See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+ Use pinmux 0x418 as wakeup interrupt and gpio1_0 as interrupt source
+
+palmas@48 {
+	compatible = "ti,twl6035", "ti,palmas";
+	reg = <0x48>
+	interrupt-parent = <&intc>;
+	interrupt-controller;
+	#interrupt-cells = <2>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	interrupts-extended = <&gpio1 0 IRQ_TYPE_LEVEL_HIGH>,
+			      <&pinmux 0x418>;
+	pmic {
+		compatible = "ti,twl6035-pmic", "ti,palmas-pmic";
+		....
+	};
+}
-- 
1.7.9.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/