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[RFC,0/5] PCI: qcom: rework pipe_clk/pipe_clk_src handling

Message ID 20220313000824.229405-1-dmitry.baryshkov@linaro.org
Headers show
Series PCI: qcom: rework pipe_clk/pipe_clk_src handling | expand

Message

Dmitry Baryshkov March 13, 2022, 12:08 a.m. UTC 
PCIe pipe clk (and some other clocks) must be parked to the "safe"
source (bi_tcxo) when corresponding GDSC is turned off and on again.
Currently this is handcoded in the PCIe driver by reparenting the
gcc_pipe_N_clk_src clock.

Instead of doing it manually, follow the approach used by
clk_rcg2_shared_ops and implement this parking in the enable() and
disable() clock operations for respective pipe clocks.

Dmitry Baryshkov (5):
  clk: qcom: regmap-mux: add pipe clk implementation
  clk: qcom: gcc-sm8450: use new clk_regmap_mux_safe_ops for PCIe pipe
    clocks
  clk: qcom: gcc-sc7280: use new clk_regmap_mux_safe_ops for PCIe pipe
    clocks
  PCI: qcom: Remove unnecessary pipe_clk handling
  PCI: qcom: Drop manual pipe_clk_src handling

 drivers/clk/qcom/clk-regmap-mux.c      | 70 +++++++++++++++++++++
 drivers/clk/qcom/clk-regmap-mux.h      |  3 +
 drivers/clk/qcom/gcc-sc7280.c          |  6 +-
 drivers/clk/qcom/gcc-sm8450.c          |  6 +-
 drivers/pci/controller/dwc/pcie-qcom.c | 87 +-------------------------
 5 files changed, 84 insertions(+), 88 deletions(-)