[PATCH 0/3] clk: qcom: sm8450: Fix eUSB3 clkref rate and camera power collapse

[redducc <sushmit718@gmail.com>]

Three fixes for the SM8450 clock controllers, found while bringing up
the Nothing Phone (2), which uses the SM8450 derivative SM8475.

Patch 1 parents gcc_eusb3_0_clkref_en to bi_tcxo. Without a parent its
rate reads as 0, and the SNPS eUSB2 PHY rejects it as its reference
clock, so USB doesn't come up on SM8475.

Patches 2 and 3 fix camera power collapse in camcc-sm8450, matching
what camcc-sm8550 already does:
 - set RETAIN_FF_ENABLE and the GDSC wait values, so the IFE GDSC
   doesn't get stuck off when powered up for the next session
 - park the camera RCGs on XO while disabled (clk_rcg2_shared_ops), so
   the Titan top GDSC doesn't hang the SoC when it collapses after a
   camera session

Tested on the Nothing Phone (2) (SM8475). The patches apply to
next-20261016 and build without warnings at W=1.

redducc (3):
  clk: qcom: gcc-sm8450: Parent the eUSB3 clkref to bi_tcxo
  clk: qcom: camcc-sm8450: Retain flops across camera GDSC collapse
  clk: qcom: camcc-sm8450: Park the camera RCGs when they are disabled

 drivers/clk/qcom/camcc-sm8450.c | 113 ++++++++++++++++++++------------
 drivers/clk/qcom/gcc-sm8450.c   |   4 ++
 2 files changed, 74 insertions(+), 43 deletions(-)


base-commit: 6a56f4f29711dd2da49f03a5b99ce53779e638d7
prerequisite-patch-id: 154550924ab1d2c1bc95517c058aaee0bb242f92
-- 
2.43.0