[PATCH v1 0/5] PCI: qcom: rework pipe_clk/pipe_clk_src handling

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

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.

Changes since RFC:
 - Rework clk-regmap-mux fields. Specify safe parent as P_* value rather
   than specifying the register value directly
 - Expand commit message to the first patch to specially mention that
   it is required only on newer generations of Qualcomm chipsets.

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      | 78 +++++++++++++++++++++++
 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, 92 insertions(+), 88 deletions(-)

-- 
2.35.1