linux-kernel - Re: [PATCH v7 1/3] Documentation: common clk API

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Date:	Fri, 16 Mar 2012 15:33:04 -0700
From:	"Turquette, Mike" <mturquette@...com>
To:	Paul Walmsley <paul@...an.com>
Cc:	Arnd Bergmann <arnd@...db.de>,
	linux-arm-kernel@...ts.infradead.org,
	Amit Kucheria <amit.kucheria@...aro.org>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	linaro-dev@...ts.linaro.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Saravana Kannan <skannan@...eaurora.org>,
	Jeremy Kerr <jeremy.kerr@...onical.com>,
	Magnus Damm <magnus.damm@...il.com>,
	Deepak Saxena <dsaxena@...aro.org>, patches@...aro.org,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Rob Herring <rob.herring@...xeda.com>,
	Russell King <linux@....linux.org.uk>,
	Thomas Gleixner <tglx@...utronix.de>,
	Richard Zhao <richard.zhao@...aro.org>,
	Shawn Guo <shawn.guo@...escale.com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 1/3] Documentation: common clk API

On Fri, Mar 16, 2012 at 3:21 PM, Paul Walmsley <paul@...an.com> wrote:
> From: Paul Walmsley <paul@...an.com>
> Date: Fri, 16 Mar 2012 16:06:30 -0600
> Subject: [PATCH] clk: mark the common clk code as EXPERIMENTAL for now
>
> Mark the common clk code as depending on CONFIG_EXPERIMENTAL.  The API
> is not well-defined and both it and the underlying mechanics are likely
> to need significant changes to support non-trivial uses of the rate
> changing code, such as DVFS with external I/O devices.  So any platforms
> that switch their implementation over to this may need to revise much
> of their driver code and revalidate their implementations until the
> behavior of the code is better-defined.
>
> A good time for removing this EXPERIMENTAL designation would be after at
> least two platforms that do DVFS on groups of external I/O devices have
> ported their clock implementations over to the common clk code.
>
> Signed-off-by: Paul Walmsley <paul@...an.com>
> Cc: Mike Turquette <mturquette@...com>

ACK.  This will set some reasonable expectations while things are in flux.

Arnd are you willing to take this in?

Thanks,
Mike

> ---
>  drivers/clk/Kconfig |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
> index 2eaf17e..a0a83de 100644
> --- a/drivers/clk/Kconfig
> +++ b/drivers/clk/Kconfig
> @@ -12,6 +12,7 @@ config HAVE_MACH_CLKDEV
>  menuconfig COMMON_CLK
>        bool "Common Clock Framework"
>        select HAVE_CLK_PREPARE
> +       depends on EXPERIMENTAL
>        ---help---
>          The common clock framework is a single definition of struct
>          clk, useful across many platforms, as well as an
> --
> 1.7.9.1
>
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