[PATCH 0/4] Add QCOM graphics clock controller driver for SDM845

From: Amit Nischal
Date: Wed Jun 06 2018 - 07:43:20 EST

This patch series adds support for graphics clock controller for SDM845.
Below is the brief description for each change:

1. For some of the GDSCs, there is requirement to enable/disable the
few clocks before turning on/off the gdsc power domain. This patch
will add support to enable/disable the clock associated with the
gdsc along with power domain on/off callbacks.

2. To turn on the gpu_gx_gdsc, there is a hardware requirement to
turn on the root clock (GFX3D RCG) first which would be the turn
on signal for the gdsc along with the SW_COLLAPSE. As per the
current implementation of clk_rcg2_shared_ops, it clears the
root_enable bit in the enable() and set_rate() clock ops. But due
to the above said requirement for GFX3D shared RCG, root_enable bit
would be already set by gdsc driver and rcg2_shared_ops should not clear
the root unless the disable() is called.

This patch add support for the same by reusing the existing
clk_rcg2_shared_ops and deriving "clk_rcg2_gfx3d_ops" clk_ops
for GFX3D clock to take care of the root set/clear requirement.

3. Add device tree bindings for graphics clock controller for SDM845.

4. Add graphics clock controller (GPUCC) driver for SDM845.

Amit Nischal (4):
clk: qcom: gdsc: Add support to enable/disable the clocks with GDSC
clk: qcom: Add clk_rcg2_gfx3d_ops for SDM845
dt-bindings: clock: Introduce QCOM Graphics clock bindings
clk: qcom: Add graphics clock controller driver for SDM845

.../devicetree/bindings/clock/qcom,gpucc.txt | 18 +
drivers/clk/qcom/Kconfig | 9 +
drivers/clk/qcom/Makefile | 1 +
drivers/clk/qcom/clk-rcg.h | 1 +
drivers/clk/qcom/clk-rcg2.c | 78 +++-
drivers/clk/qcom/gdsc.c | 44 ++
drivers/clk/qcom/gdsc.h | 5 +
drivers/clk/qcom/gpucc-sdm845.c | 441 +++++++++++++++++++++
include/dt-bindings/clock/qcom,gpucc-sdm845.h | 38 ++
9 files changed, 614 insertions(+), 21 deletions(-)
create mode 100644 Documentation/devicetree/bindings/clock/qcom,gpucc.txt
create mode 100644 drivers/clk/qcom/gpucc-sdm845.c
create mode 100644 include/dt-bindings/clock/qcom,gpucc-sdm845.h

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