From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: "Andy Gross" <agross@kernel.org>,
"Bjorn Andersson" <bjorn.andersson@linaro.org>,
"Stephen Boyd" <swboyd@chromium.org>,
"Michael Turquette" <mturquette@baylibre.com>,
"Taniya Das" <quic_tdas@quicinc.com>,
"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Bjorn Helgaas" <bhelgaas@google.com>
Cc: Prasad Malisetty <quic_pmaliset@quicinc.com>,
Johan Hovold <johan+linaro@kernel.org>,
linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org,
linux-pci@vger.kernel.org
Subject: [PATCH v4 0/5] PCI: qcom: Rework pipe_clk/pipe_clk_src handling
Date: Sun, 1 May 2022 22:21:44 +0300 [thread overview]
Message-ID: <20220501192149.4128158-1-dmitry.baryshkov@linaro.org> (raw)
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.
PCIe part depends on [1].
Changes since v3:
- Replaced the clock multiplexer implementation with branch-like clock.
Changes since v2:
- Added is_enabled() callback
- Added default parent to the pipe clock configuration
Changes since v1:
- Rebased on top of [1].
- Removed erroneous Fixes tag from the patch 4.
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.
[1]: https://lore.kernel.org/all/20220401133351.10113-1-johan+linaro@kernel.org/
Dmitry Baryshkov (5):
PCI: qcom: Remove unnecessary pipe_clk handling
clk: qcom: regmap: add pipe clk implementation
clk: qcom: gcc-sm8450: use new clk_regmap_pipe_ops for PCIe pipe
clocks
clk: qcom: gcc-sc7280: use new clk_regmap_pipe_ops for PCIe pipe
clocks
PCI: qcom: Drop manual pipe_clk_src handling
drivers/clk/qcom/Makefile | 1 +
drivers/clk/qcom/clk-regmap-pipe.c | 62 ++++++++++++++++++++
drivers/clk/qcom/clk-regmap-pipe.h | 24 ++++++++
drivers/clk/qcom/gcc-sc7280.c | 49 ++++++----------
drivers/clk/qcom/gcc-sm8450.c | 51 ++++++----------
drivers/pci/controller/dwc/pcie-qcom.c | 81 +-------------------------
6 files changed, 128 insertions(+), 140 deletions(-)
create mode 100644 drivers/clk/qcom/clk-regmap-pipe.c
create mode 100644 drivers/clk/qcom/clk-regmap-pipe.h
--
2.35.1
next reply other threads:[~2022-05-01 19:21 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-01 19:21 Dmitry Baryshkov [this message]
2022-05-01 19:21 ` [PATCH v4 1/5] PCI: qcom: Remove unnecessary pipe_clk handling Dmitry Baryshkov
2022-05-02 10:13 ` Manivannan Sadhasivam
2022-05-09 9:41 ` Johan Hovold
2022-05-01 19:21 ` [PATCH v4 2/5] clk: qcom: regmap: add pipe clk implementation Dmitry Baryshkov
2022-05-02 10:10 ` Manivannan Sadhasivam
2022-05-02 10:35 ` Dmitry Baryshkov
2022-05-02 11:10 ` Manivannan Sadhasivam
2022-05-02 11:18 ` Dmitry Baryshkov
2022-05-02 15:06 ` Manivannan Sadhasivam
2022-05-02 15:24 ` Dmitry Baryshkov
2022-05-06 12:54 ` Johan Hovold
2022-05-06 15:25 ` Manivannan Sadhasivam
2022-05-06 12:40 ` Johan Hovold
2022-05-06 13:00 ` Dmitry Baryshkov
2022-05-09 10:29 ` Johan Hovold
2022-05-11 14:17 ` Dmitry Baryshkov
2022-05-13 8:22 ` Johan Hovold
2022-05-11 14:34 ` Manivannan Sadhasivam
2022-05-06 12:31 ` Johan Hovold
2022-05-06 12:40 ` Dmitry Baryshkov
2022-05-09 10:28 ` Johan Hovold
2022-05-09 10:17 ` Johan Hovold
2022-05-01 19:21 ` [PATCH v4 3/5] clk: qcom: gcc-sm8450: use new clk_regmap_pipe_ops for PCIe pipe clocks Dmitry Baryshkov
2022-05-01 19:21 ` [PATCH v4 4/5] clk: qcom: gcc-sc7280: " Dmitry Baryshkov
2022-05-01 19:21 ` [PATCH v4 5/5] PCI: qcom: Drop manual pipe_clk_src handling Dmitry Baryshkov
2022-05-09 10:24 ` Johan Hovold
2022-05-11 13:19 ` [PATCH v4 0/5] PCI: qcom: Rework pipe_clk/pipe_clk_src handling Lorenzo Pieralisi
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