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From: Dale Farnsworth <dale@farnsworth.org>
To: Paul Mundt <lethal@linux-sh.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>,
	rtc-linux@googlegroups.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] rtc: rtc-max6900: SMBus support.
Date: Thu, 14 Jan 2010 07:39:47 -0700	[thread overview]
Message-ID: <20100114143947.GA4564@farnsworth.org> (raw)
In-Reply-To: <20100114113235.GA20473@linux-sh.org>

On Thu, Jan 14, 2010 at 08:32:35PM +0900, Paul Mundt wrote:
> The current rtc-max6900 driver only supports getting and setting the time
> through bursting, which requires a controller capable of such. As
> bursting is merely an optimization, we can also opt for the non-burst
> fallback path that pokes at the date/time registers individually.
> 
> By opting for the fallback solution, it's possible to fully support the
> RTC on controllers that only implement I2C_FUNC_SMBUS_BYTE_DATA instead
> of requiring master transfers via I2C_FUNC_I2C.
> 
> This was tested with an I2C_FUNC_SMBUS_BYTE_DATA controller with a MAX6909
> attached. Currently only a subset of the MAX6909 functionality is supported,
> patches to extend the current driver to be forthcoming.
> 
> There are no functional changes for I2C_FUNC_I2C controllers.
> 
> Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Acked-by: Dale Farnsworth <dale@farnsworth.org>

  reply	other threads:[~2010-01-14 15:11 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-01-14 11:32 [PATCH] rtc: rtc-max6900: SMBus support Paul Mundt
2010-01-14 14:39 ` Dale Farnsworth [this message]
2010-01-15 15:37 ` [rtc-linux] " Alessandro Zummo

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