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

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Date:   Wed,  6 Jun 2018 17:11:44 +0530
From:   Amit Nischal <anischal@...eaurora.org>
To:     Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>
Cc:     Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Odelu Kukatla <okukatla@...eaurora.org>,
        Taniya Das <tdas@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Amit Nischal <anischal@...eaurora.org>
Subject: [PATCH 0/4] Add QCOM graphics clock controller driver for SDM845

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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