Date: Tue, 28 Jul 2015 22:38:25 +0800
From: Dong Aisheng <b29396@freescale.com>
To: Dong Aisheng <aisheng.dong@freescale.com>
CC: <linux-clk@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <sboyd@codeaurora.org>, <mturquette@baylibre.com>,
        <shawnguo@kernel.org>, <linux-arm-kernel@lists.infradead.org>,
        <Ranjani.Vaidyanathan@freescale.com>, <b20596@freescale.com>,
        <r64343@freescale.com>, <b20788@freescale.com>
Subject: Re: [PATCH V3 0/5] clk: support clocks which requires parent clock
 on during operation
Message-ID: <20150728143824.GB16916@shlinux1.ap.freescale.net>
References: <1438089585-30103-1-git-send-email-aisheng.dong@freescale.com>
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On Tue, Jul 28, 2015 at 09:19:40PM +0800, Dong Aisheng wrote:
> This patch series adds support in clock framework for clocks which operations
> requires its parent clock is on.
> 
> Such clock type is initially met on Freescale i.MX7D platform that all clocks
> operations, including enable/disable, rate change and re-parent, requires its
> parent clock on. No sure if any other SoC has the similar clock type.
> 
> Current clock core can not support such type of clock well.
> 
> This patch introduce a new flag CLK_SET_PARENT_ON to handle this special case
> in clock core that enable its parent clock firstly for each operation and disable
> it later after operation complete.
> 
> The most special case is for set_parent() operation which requires both parent,
> old one and new one, to be enabled at the same time during the operation.
> 
> The patch series is based on for-next branch of Michael's git:
> git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git
> 
> Change Log:
> v2->v3:
>  * rebased version, no other changes.
> 
> v1->v2:
>  Mainly addressed Stephen Boyd's comments
>  * remove dupliciated code with __clk_set_parent_after
>  * introduce more clk_core_x APIs for core easily use
>  * move clk_disable_unused code position
>  * use clk_core_x API to make code more clean and easily read
> 
> Dong Aisheng (5):
>   clk: remove duplicated code with __clk_set_parent_after
>   clk: introduce clk_core_enable_lock and clk_core_disable_lock
>     functions
>   clk: move clk_disable_unused after clk_core_disable_unprepare function
>   clk: core: add CLK_OPS_PARENT_ON flags to support clocks require
>     parent on
>   clk: core: add CLK_OPS_PARENT_ON flags to support clocks require
>     parent on
> 
>  drivers/clk/clk.c            | 338 +++++++++++++++++++++++++------------------
>  include/linux/clk-provider.h |   5 +
>  2 files changed, 200 insertions(+), 143 deletions(-)
> 

Sorry, forgot to update Mike's new email address.
Updated.

Regards
Dong Aisheng

> -- 
> 1.9.1
> 
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