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843be1e7fb
linux/drivers/clk/qcom
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Rajendra Nayak 843be1e7fb clk: qcom: gdsc: Fix handling of hw control enable/disable 
Once a gdsc is brought in and out of HW control, there is a
power down and up cycle which can take upto 1us. Polling on
the gdsc status immediately after the hw control enable/disable
can mislead software/firmware to belive the gdsc is already either on
or off, while its yet to complete the power cycle.
To avoid this add a 1us delay post a enable/disable of HW control
mode.

Also after the HW control mode is disabled, poll on the status to
check gdsc status reflects its 'on' before force disabling it
in software.

Reported-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Reviewed-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Tested-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Fixes: 904bb4f5c7 ("clk: qcom: gdsc: Add support for gdscs with HW control")
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2017-01-26 16:00:38 -08:00
..
clk-alpha-pll.c clk: qcom: Add .is_enabled ops for clk-alpha-pll 2016-11-02 14:52:58 -07:00
clk-alpha-pll.h clk: qcom: Enable FSM mode for votable alpha PLLs 2016-11-01 18:39:17 -07:00
clk-branch.c clk: Convert __clk_get_name(hw->clk) to clk_hw_get_name(hw) 2015-08-24 16:49:12 -07:00
clk-branch.h clk: qcom: Add support for branches/gate clocks 2014-01-16 12:01:01 -08:00
clk-pll.c clk: qcom: Enable FSM mode for votable alpha PLLs 2016-11-01 18:39:17 -07:00
clk-pll.h clk: qcom: Add support for SR2 PLLs 2015-07-07 17:19:58 -07:00
clk-rcg2.c clk: qcom: Add rcg ops to return floor value closest to the requested rate 2016-11-23 11:00:05 -08:00
clk-rcg.c clk: qcom: Fix pre-divider usage for pixel RCG 2016-02-29 12:57:06 -08:00
clk-rcg.h clk: qcom: Add rcg ops to return floor value closest to the requested rate 2016-11-23 11:00:05 -08:00
clk-regmap-divider.c clk: qcom: Add support for regmap divider clocks 2015-01-27 11:49:00 -08:00
clk-regmap-divider.h clk: qcom: Add support for regmap divider clocks 2015-01-27 11:49:00 -08:00
clk-regmap-mux.c clk: qcom: Add simple regmap based muxes 2015-01-27 11:49:09 -08:00
clk-regmap-mux.h clk: qcom: Add simple regmap based muxes 2015-01-27 11:49:09 -08:00
clk-regmap.c clk: qcom: Migrate to clk_hw based registration and OF APIs 2016-08-24 17:37:06 -07:00
clk-regmap.h clk: qcom: Migrate to clk_hw based registration and OF APIs 2016-08-24 17:37:06 -07:00
clk-rpm.c clk: qcom: clk-rpm: Fix clk_hw references 2016-11-23 11:12:48 -08:00
clk-smd-rpm.c clk: qcom: smd-rpmcc: Add msm8974 clocks 2016-12-21 16:04:35 -08:00
common.c clk: qcom: Add rcg ops to return floor value closest to the requested rate 2016-11-23 11:00:05 -08:00
common.h clk: qcom: Add rcg ops to return floor value closest to the requested rate 2016-11-23 11:00:05 -08:00
gcc-apq8084.c clk: qcom: Move all sdcc rcgs to use clk_rcg2_floor_ops 2016-11-23 11:00:06 -08:00
gcc-ipq806x.c clk: qcom: ipq806x: Fix board clk rates 2016-11-09 17:10:32 -08:00
gcc-ipq4019.c clk: qcom: ipq4019: Add the cpu clock frequency change notifier 2016-12-27 13:44:34 -08:00
gcc-mdm9615.c clk: mdm9615: Add EBI2 clock 2017-01-09 16:33:26 -08:00
gcc-msm8660.c clk: qcom: add EBI2 clocks to the MSM8660 GCC 2016-07-01 18:12:45 -07:00
gcc-msm8916.c clk: qcom: Move all sdcc rcgs to use clk_rcg2_floor_ops 2016-11-23 11:00:06 -08:00
gcc-msm8960.c clk: qcom: Remove CLK_IS_ROOT 2016-03-04 12:53:53 -08:00
gcc-msm8974.c clk: qcom: Move all sdcc rcgs to use clk_rcg2_floor_ops 2016-11-23 11:00:06 -08:00
gcc-msm8994.c clk: qcom: Move all sdcc rcgs to use clk_rcg2_floor_ops 2016-11-23 11:00:06 -08:00
gcc-msm8996.c clk: qcom: Add GCC_MSS_RESET support 2017-01-09 16:06:43 -08:00
gdsc.c clk: qcom: gdsc: Fix handling of hw control enable/disable 2017-01-26 16:00:38 -08:00
gdsc.h clk: qcom: gdsc: Add support for gdscs with HW control 2016-11-23 16:41:15 -08:00
Kconfig Merge branch 'clk-qcom-rpm' into clk-next 2016-11-10 16:50:16 -08:00
lcc-ipq806x.c clk: qcom: lcc-ipq806x: Fixup overriding val in regmap_read call 2016-11-01 17:44:09 -07:00
lcc-mdm9615.c clk: mdm9615: Add support for MDM9615 Clock Controllers 2016-08-15 15:51:21 -07:00
lcc-msm8960.c Revert "clk: qcom: Specify LE device endianness" 2016-02-12 14:24:24 -08:00
Makefile Merge branch 'clk-qcom-rpm' into clk-next 2016-11-10 16:50:16 -08:00
mmcc-apq8084.c Revert "clk: qcom: Specify LE device endianness" 2016-02-12 14:24:24 -08:00
mmcc-msm8960.c clk: qcom: Remove CLK_IS_ROOT 2016-03-04 12:53:53 -08:00
mmcc-msm8974.c Merge branch 'clk-fixes' into clk-next 2016-02-18 19:17:29 -08:00
mmcc-msm8996.c clk: qcom: Put venus core0/1 gdscs to hw control mode 2016-11-23 16:41:19 -08:00
reset.c clk: qcom: Make reset_control_ops const 2016-03-29 16:30:26 -07:00
reset.h clk: qcom: Make reset_control_ops const 2016-03-29 16:30:26 -07:00