linux-kernel - Re: [PATCH 3/4] rtc: omap: add rtc wakeup support to alarm events

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Message-ID: <871u7hom0q.fsf@linaro.org>
Date:	Mon, 01 Jul 2013 17:15:01 -0700
From:	Kevin Hilman <khilman@...aro.org>
To:	Hebbar Gururaja <gururaja.hebbar@...com>
Cc:	<tony@...mide.com>, <b-cousson@...com>,
	<linux-omap@...r.kernel.org>,
	<devicetree-discuss@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<davinci-linux-open-source@...ux.davincidsp.com>,
	<vaibhav.bedia@...com>, <sudhakar.raj@...com>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>, Sekhar Nori <nsekhar@...com>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	<rtc-linux@...glegroups.com>, <linux-doc@...r.kernel.org>
Subject: Re: [PATCH 3/4] rtc: omap: add rtc wakeup support to alarm events

Hebbar Gururaja <gururaja.hebbar@...com> writes:

> On some platforms (like AM33xx), a special register (RTC_IRQWAKEEN)
> is available to enable Alarm Wakeup feature. This register needs to be
> properly handled for the rtcwake to work properly.
>
> Platforms using such IP should set "ti,am3352-rtc" in rtc device dt
> compatibility node.
>
> Signed-off-by: Hebbar Gururaja <gururaja.hebbar@...com>
> Cc: Grant Likely <grant.likely@...aro.org>
> Cc: Rob Herring <rob.herring@...xeda.com>
> Cc: Rob Landley <rob@...dley.net>
> Cc: Sekhar Nori <nsekhar@...com>
> Cc: Kevin Hilman <khilman@...aro.org>
> Cc: Alessandro Zummo <a.zummo@...ertech.it>
> Cc: rtc-linux@...glegroups.com
> Cc: devicetree-discuss@...ts.ozlabs.org
> Cc: linux-doc@...r.kernel.org

Acked-by: Kevin Hilman <khilman@...aro.org>

...with a minor nit below...

> ---
> :100644 100644 b47aa41... 5a0f02d... M	Documentation/devicetree/bindings/rtc/rtc-omap.txt
> :100644 100644 761919d... 666b0c2... M	drivers/rtc/rtc-omap.c
>  Documentation/devicetree/bindings/rtc/rtc-omap.txt |    6 ++-
>  drivers/rtc/rtc-omap.c                             |   56 +++++++++++++++++---
>  2 files changed, 54 insertions(+), 8 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/rtc/rtc-omap.txt b/Documentation/devicetree/bindings/rtc/rtc-omap.txt
> index b47aa41..5a0f02d 100644
> --- a/Documentation/devicetree/bindings/rtc/rtc-omap.txt
> +++ b/Documentation/devicetree/bindings/rtc/rtc-omap.txt
> @@ -1,7 +1,11 @@
>  TI Real Time Clock
>  
>  Required properties:
> -- compatible: "ti,da830-rtc"
> +- compatible:
> +	- "ti,da830-rtc"  - for RTC IP used similar to that on DA8xx SoC family.
> +	- "ti,am3352-rtc" - for RTC IP used similar to that on AM335x SoC family.
> +			    This RTC IP has special WAKE-EN Register to enable
> +			    Wakeup generation for event Alarm.
>  - reg: Address range of rtc register set
>  - interrupts: rtc timer, alarm interrupts in order
>  - interrupt-parent: phandle for the interrupt controller
> diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
> index 761919d..666b0c2 100644
> --- a/drivers/rtc/rtc-omap.c
> +++ b/drivers/rtc/rtc-omap.c
> @@ -72,6 +72,8 @@
>  #define OMAP_RTC_KICK0_REG		0x6c
>  #define OMAP_RTC_KICK1_REG		0x70
>  
> +#define OMAP_RTC_IRQWAKEEN		0x7C
> +

nit: letters in hex numbers are usually lower-case.


Kevin
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