From mboxrd@z Thu Jan  1 00:00:00 1970
From: heiko@sntech.de (Heiko =?ISO-8859-1?Q?St=FCbner?=)
Date: Fri, 15 Apr 2016 09:31:55 +0200
Subject: [PATCH v5 2/2] i2c: rk3x: add i2c support for rk3399 soc
In-Reply-To: <20160414184848.GB2338@katana>
References: <1458147438-62387-1-git-send-email-david.wu@rock-chips.com>
 <1458147438-62387-3-git-send-email-david.wu@rock-chips.com>
 <20160414184848.GB2338@katana>
Message-ID: <2530516.Iqqf6HUmr5@diego>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

David,

Am Donnerstag, 14. April 2016, 20:48:48 schrieb Wolfram Sang:
> > + - input-clk-rate : frequency rate of function clock used(in Hz). If
> > omitted, +	the default clock rate is used. It is just used at rk3399 soc.
> 
> Why is this needed? Why don't we simply use the default or calculate the
> best value somehow?

if you need to _get_ the clock-rate, clk_get_rate is the abvious choice and if 
you need to _set_ some specific rate, I guess it should be done via the 
assigned-clocks mechanism in the devicetree - see veyron dts files that already 
do this for some other parts.