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3 Commits

Author SHA1 Message Date
Chunyan Zhang 8b4f6b8d59 clk: sprd: check its parent status before reading gate clock 
Some clocks only can be accessed if their parent is enabled. mipi_csi_xx
clocks on SC9863A are an examples. We have to ensure the parent clock is
enabled when reading those clocks.

Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Link: https://lkml.kernel.org/r/20200527053638.31439-2-zhang.lyra@gmail.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
 2020-05-26 23:41:14 -07:00
Xiaolong Zhang 187e5cd2d1 clk: sprd: add gate for pll clocks 
Some sprd's gate clocks are used to the switch of pll, which
need to wait a certain time for stable after being enabled.

Signed-off-by: Xiaolong Zhang <xiaolong.zhang@unisoc.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Link: https://lkml.kernel.org/r/20200304072730.9193-2-zhang.lyra@gmail.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
 2020-03-24 19:03:56 -07:00
Chunyan Zhang cdb09f67a2 clk: sprd: add gate clock support 
Some clocks on the Spreadtrum's SoCs are just simple gates. Add
support for those clocks.

Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
 2017-12-21 15:00:51 -08:00