linux-kernel - Re: [PATCH 1/3] ARM: dts: omap5-board-common: enable rtc and charging of backup battery

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: <568CCCA2.4040004@nvidia.com>
Date:	Wed, 6 Jan 2016 13:43:22 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	"H. Nikolaus Schaller" <hns@...delico.com>,
	Nishanth Menon <nm@...com>
CC:	Benoît Cousson <bcousson@...libre.com>,
	Tony Lindgren <tony@...mide.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	"Russell King" <linux@....linux.org.uk>,
	linux-omap <linux-omap@...r.kernel.org>,
	<devicetree@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
	"Marek Belisko" <marek@...delico.com>
Subject: Re: [PATCH 1/3] ARM: dts: omap5-board-common: enable rtc and charging
 of backup battery


On Wednesday 06 January 2016 01:12 PM, H. Nikolaus Schaller wrote:
> Hi,
>
> Am 06.01.2016 um 00:40 schrieb Nishanth Menon <nm@...com>:
>
>> On 01/05/2016 06:01 AM, H. Nikolaus Schaller wrote:
>>> +		rtc {
>>> +			compatible = "ti,palmas-rtc";
>>> +			interrupt-parent = <&palmas>;
>>> +			interrupts = <8 IRQ_TYPE_NONE>;
>> IRQ_TYPE_NONE is not correct here -> it should have some polarity - if
>> it had none, there'd be no interrupt, right?
> Well, it just translates IRQ_TYPE_NONE through
>
> Linux/include/dt-bindings/interrupt-controller/irq.h
>
> to
>
> interrupts = <8 0>;
>
> which is given as an example in
>
> Documentation//devicetree/bindings/rtc/rtc-palmas.txt
>
> Since I don't know anything about the rtc driver beyond the bindings documentation I assume it is correct...
> I have added Laxman Dewangan because he introduced this interrupts = <8 0>;
>

As this is for palmas interrupt controller, it does not use the second 
field for interrupt from RTC.
So there is no really any polarity. It can be set to 0.

The second argument will be used for GPIOs mainly. However, support need 
to be added on GPIO driver for rising/falling configuration.




--
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/