linux-kernel - Re: [PATCH 6/6] documentation: bindings: document PMIC8921/8058 RTC

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Message-ID: <20140307190114.GJ18529@joshc.qualcomm.com>
Date:	Fri, 7 Mar 2014 13:01:14 -0600
From:	Josh Cartwright <joshc@...eaurora.org>
To:	Stephen Boyd <sboyd@...eaurora.org>
Cc:	Alessandro Zummo <a.zummo@...ertech.it>,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	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>,
	Rob Landley <rob@...dley.net>, devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org
Subject: Re: [PATCH 6/6] documentation: bindings: document PMIC8921/8058 RTC

On Wed, Mar 05, 2014 at 05:31:27PM -0800, Stephen Boyd wrote:
> On 03/05/14 16:00, Josh Cartwright wrote:
> > On Wed, Mar 05, 2014 at 12:58:55PM -0800, Stephen Boyd wrote:
> >> On 03/05/14 11:29, Josh Cartwright wrote:
> >>> diff --git a/Documentation/devicetree/bindings/rtc/qcom,pm8xxx-rtc.txt b/Documentation/devicetree/bindings/rtc/qcom,pm8xxx-rtc.txt
> >>> new file mode 100644
> >>> index 0000000..699bd30
> >>> --- /dev/null
> >>> +++ b/Documentation/devicetree/bindings/rtc/qcom,pm8xxx-rtc.txt
> >>> @@ -0,0 +1,29 @@
> >>> +* Real-Time Clock for Qualcomm 8058/8921 PMICs
> >>> +
> >>> +Required properties:
> >>> +- compatible: should be one of the following.
> >>> +    * "qcom,pm8058-rtc"
> >>> +    * "qcom,pm8921-rtc"
> >>> +- reg: base address of the register region
> >>> +- reg-names: corresponding reg names for the regions listed in the 'reg'
> >>> +             property, must contain:
> >>> +     "rtc_base" - base of the RTC register region
> >> optional reg-names?
> >>
> >>> +- interrupts: interrupt list for the RTC, must contain a single interrupt
> >>> +              specifier for the alarm interrupt
> >>> +- interrupt-names: corresponding interrupt names for the interrupts listed in
> >>> +                   the 'interrupts' property, must contain:
> >>> +     "alarm" - summary interrupt for PMIC peripherals
> >> optional interrupt-names?
> > It isn't clear to me why these should be made optional, I hope Rob
> > provides some clarification in the sdhci-msm thread.
> 
> Looks like the driver isn't using either of these properties, so I'm not
> sure why they're needed. Maybe they should just be removed.

The driver does make use of platform_get_irq_byname(pdev, "alarm"), and
I expect to make use of platform_get_resource_byname(pdev, IORESOURCE_REG, "rtc_base")
in the near future.

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