[PATCH v3 0/3] Misc patches to support clocks for SDM845
From: Amit Nischal
Date: Tue Apr 03 2018 - 09:23:09 EST
Changes in v3:
1. Adressed review comments given for v2 series.
2. The GCC clock driver(patch 3) depends upon the below patches related
to GDSC operation and are under review.
Changes in v2:
Fixup for recalc_rate ops for clk_rcg2_shared_ops:
There could be few scenarios where shared clocks are configured
at rate other than CXO by boot. In those cases there would be a
mismatch between the rate calculated by the recalc shared ops
and the actual HW register configuration. Fix the same by adding
an additional check to read current src from CFG register and
make a decision based on that.
Changes in v1:
This patch series does the miscellaneous changes to support
clock nodes for SDM845. Below are the major changes for
which the existing code does not have support.
1. Clear hardware clock control bit of RCGs where HW clock
control bit is set by default so that software can control
those root clocks.
2. Introduces clk_rcg2_shared_ops to support clock controller
drivers for SDM845. With new shared ops, RCGs with shared
branches will be configured to a safe source in disable
path and actual RCG update configuration will be done in
enable path instead of doing config update in set_rate.
In set_rate(), just cache the rate instead of doing actual
configuration update. Also each RCG in clock controller
driver will have their own safe configuration frequency
table to switch to safe frequency.
3. Add support for controlling Fabia PLL for which the support
is not available in existing alpha PLL code.
4. Add Global Clock controller (GCC) driver for SDM845. This
should allow most non-multimedia device drivers to probe
and control their clocks.
[v1] : https://lkml.org/lkml/2018/1/31/209
[v2] : https://lkml.org/lkml/2018/3/8/495
Amit Nischal (2):
clk: qcom: Clear hardware clock control bit of RCG
clk: qcom: Configure the RCGs to a safe source as needed
Taniya Das (1):
clk: qcom: Add Global Clock controller (GCC) driver for SDM845
.../devicetree/bindings/clock/qcom,gcc.txt | 1 +
drivers/clk/qcom/Kconfig | 9 +
drivers/clk/qcom/Makefile | 1 +
drivers/clk/qcom/clk-rcg.h | 7 +-
drivers/clk/qcom/clk-rcg2.c | 176 +-
drivers/clk/qcom/gcc-sdm845.c | 3546 ++++++++++++++++++++
include/dt-bindings/clock/qcom,gcc-sdm845.h | 242 ++
7 files changed, 3979 insertions(+), 3 deletions(-)
create mode 100644 drivers/clk/qcom/gcc-sdm845.c
create mode 100644 include/dt-bindings/clock/qcom,gcc-sdm845.h
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