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

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Date:	Wed, 6 Jan 2016 08:42:35 +0100
From:	"H. Nikolaus Schaller" <hns@...delico.com>
To:	Nishanth Menon <nm@...com>, Laxman Dewangan <ldewangan@...dia.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

Hi,

Am 06.01.2016 um 00:40 schrieb Nishanth Menon <nm@...com>:

> On 01/05/2016 06:01 AM, H. Nikolaus Schaller wrote:
>> tested on OMP5432 EVM
>> 
>> Signed-off-by: H. Nikolaus Schaller <hns@...delico.com>
>> ---
>> arch/arm/boot/dts/omap5-board-common.dtsi | 8 ++++++++
>> 1 file changed, 8 insertions(+)
>> 
>> diff --git a/arch/arm/boot/dts/omap5-board-common.dtsi b/arch/arm/boot/dts/omap5-board-common.dtsi
>> index 5cf76a1..30c0d3b 100644
>> --- a/arch/arm/boot/dts/omap5-board-common.dtsi
>> +++ b/arch/arm/boot/dts/omap5-board-common.dtsi
>> @@ -358,6 +358,14 @@
>> 			#clock-cells = <0>;
>> 		};
>> 
>> +		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>;

> 
>> +			ti,backup-battery-chargeable;
>> +			ti,backup-battery-charge-high-current;
>> +		};
>> +
>> 		palmas_pmic {
>> 			compatible = "ti,palmas-pmic";
>> 			interrupt-parent = <&palmas>;
>> 
> 
> 
> -- 
> Regards,
> Nishanth Menon


BR,
Nikolaus

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