linux-kernel - Re: [PATCH v7] rtc: rewrite DS1302 using SPI

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Message-ID: <20160223232918.GA16024@rob-hp-laptop>
Date:	Tue, 23 Feb 2016 17:29:18 -0600
From:	Rob Herring <robh@...nel.org>
To:	Sergei Ianovich <ynvich@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
	<devicetree@...r.kernel.org>,
	"open list:REAL TIME CLOCK RTC SUBSYSTEM" 
	<rtc-linux@...glegroups.com>
Subject: Re: [PATCH v7] rtc: rewrite DS1302 using SPI

On Tue, Feb 23, 2016 at 01:54:57PM +0300, Sergei Ianovich wrote:
> DS1302 is half-duplex SPI device. The driver respects this fact now.
> 
> Pin configurations should be implemented using SPI subsystem.
> 
> Signed-off-by: Sergei Ianovich <ynvich@...il.com>
> CC: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
> CC: Rob Herring <robh@...nel.org>
> 
>    v6..v7
>    * change binding and doc file names
> 
>    v5..v6
>    * rewrite the driver as an SPI slave device
>    * use "maxim" for vendor name per Kconfig
>    * stop changing device RAM in device presence test
>    * only return time from device if valid
>    * use burst mode for reading/writing time
>    * dropped charging control. I cannot test it, and it looks broken
> 
>    v4..v5
>    * drop THIS_MODULE from struct platform driver
>    * use "dallas" for vendor name per vendor-prefixes.txt
> 
>    v3..v4
>    * move DTS bindings to a different patch
> 
>    v2..v3
>    * use usleep_range instead of custom nsleep
>    * number change (07/16 -> 09/21)
> 
>    v0..v2
>    * use device tree
>    * use devm helpers where possible
> ---
>  .../devicetree/bindings/rtc/maxim-ds1302.txt       |  46 +++

Acked-by: Rob Herring <robh@...nel.org>

>  drivers/rtc/Kconfig                                |  15 +-
>  drivers/rtc/rtc-ds1302.c                           | 348 ++++++++++-----------
>  3 files changed, 212 insertions(+), 197 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/rtc/maxim-ds1302.txt