Messages in this thread | | | Date | Wed, 22 Apr 2015 14:12:43 +0800 | From | Dong Aisheng <> | Subject | Re: [PATCH RFC v1 0/5] clk: support clocks which requires parent clock on during operation |
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On Wed, Apr 15, 2015 at 10:26:34PM +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. > > Patch 1~3 are minor cleanup & fixes. > Patch 4 add CLK_SET_PARENT_ON flags in clock core to support such type clocks > Patch 5 show the need of introducing clk_core_enable_lock and > clk_core_disable_lock to easily use and reduce duplicated code. > It can be merged into patch 4 if required. > > 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 > > Dong Aisheng (5): > clk: change clk_core name of __clk_set_parent_after > clk: add missing lock when call clk_core_enable in clk_set_parent > clk: remove unneeded __clk_enable and __clk_disable > clk: core: add CLK_SET_PARENT_ON flags to support clocks require > parent on > clk: introduce clk_core_enable_lock and clk_core_disable_lock > functions >
Gentle Ping.
Regards Dong Aisheng
> drivers/clk/clk.c | 112 ++++++++++++++++++++++++++++++++++--------- > include/linux/clk-provider.h | 5 ++ > 2 files changed, 94 insertions(+), 23 deletions(-) > > -- > 1.9.1 >
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