linux-kernel - [PATCH v4 0/9] Enable cpufreq for IPQ5332 & IPQ9574

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Date:   Thu, 19 Oct 2023 14:10:34 +0530
From:   Varadarajan Narayanan <quic_varada@...cinc.com>
To:     <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <mturquette@...libre.com>, <sboyd@...nel.org>, <rafael@...nel.org>,
        <viresh.kumar@...aro.org>, <ilia.lin@...nel.org>,
        <sivaprak@...eaurora.org>, <quic_kathirav@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <linux-pm@...r.kernel.org>
CC:     Varadarajan Narayanan <quic_varada@...cinc.com>
Subject: [PATCH v4 0/9] Enable cpufreq for IPQ5332 & IPQ9574

Depends On:
https://lore.kernel.org/lkml/20230913-gpll_cleanup-v2-6-c8ceb1a37680@quicinc.com/T/

This patch series aims to enable cpufreq for IPQ5332 and IPQ9574.
For IPQ5332, a minor enhancement to Stromer Plus ops and a safe
source switch is needed before cpu freq can be enabled.

These are also included in this series. Posting this as a single
series. Please let me know if this is not correct, will split in
the subsequent revisions.

Passed the following DT related validations
make W=1 ARCH=arm64 -j16 DT_CHECKER_FLAGS='-v -m' dt_binding_check DT_SCHEMA_FILES=qcom
make W=1 ARCH=arm64 -j16 CHECK_DTBS=y DT_SCHEMA_FILES=qcom dtbs_check

For IPQ5332:
~~~~~~~~~~~
	* This patch series introduces stromer plus ops which
	  builds on stromer ops and implements a different
	  set_rate and determine_rate.

	  A different set_rate is needed since stromer plus PLLs
	  do not support dynamic frequency scaling. To switch
	  between frequencies, we have to shut down the PLL,
	  configure the L and ALPHA values and turn on again. So
	  introduce the separate set of ops for Stromer Plus PLL.

	* Update ipq_pll_stromer_plus to use clk_alpha_pll_stromer_plus_ops
	  instead of clk_alpha_pll_stromer_ops.

	* Set 'l' value to a value that is supported on all SKUs.

	* Provide safe source switch for a53pll

	* Include IPQ5332 in cpufreq nvmem framework

	* Add OPP details to device tree

For IPQ9574:
~~~~~~~~~~~
	* Include IPQ9574 in cpufreq nvmem framework

	* Add OPP details to device tree

Removed 2 patches from V1 as they have been merged
	* dt-bindings: cpufreq: qcom-cpufreq-nvmem: document IPQ5332
	* dt-bindings: cpufreq: qcom-cpufreq-nvmem: document IPQ9574

v4:	Included a patch to fix 'kernel test robot' build error --
	https://lore.kernel.org/r/202310181650.g8THtfsm-lkp@intel.com/

Varadarajan Narayanan (9):
  clk: qcom: config IPQ_APSS_6018 should depend on QCOM_SMEM
  clk: qcom: clk-alpha-pll: introduce stromer plus ops
  clk: qcom: apss-ipq-pll: Use stromer plus ops for stromer plus pll
  clk: qcom: apss-ipq-pll: Fix 'l' value for ipq5332_pll_config
  clk: qcom: apss-ipq6018: ipq5332: add safe source switch for a53pll
  cpufreq: qti: Enable cpufreq for ipq53xx
  arm64: dts: qcom: ipq5332: populate the opp table based on the eFuse
  cpufreq: qti: Introduce cpufreq for ipq95xx
  arm64: dts: qcom: ipq9574: populate the opp table based on the eFuse

 arch/arm64/boot/dts/qcom/ipq5332.dtsi | 19 +++++++++--
 arch/arm64/boot/dts/qcom/ipq9574.dtsi | 21 +++++++++++-
 drivers/clk/qcom/Kconfig              |  1 +
 drivers/clk/qcom/apss-ipq-pll.c       |  4 +--
 drivers/clk/qcom/apss-ipq6018.c       | 58 +++++++++++++++++++++++++++++++-
 drivers/clk/qcom/clk-alpha-pll.c      | 63 +++++++++++++++++++++++++++++++++++
 drivers/clk/qcom/clk-alpha-pll.h      |  1 +
 drivers/cpufreq/cpufreq-dt-platdev.c  |  2 ++
 drivers/cpufreq/qcom-cpufreq-nvmem.c  | 16 +++++++++
 9 files changed, 178 insertions(+), 7 deletions(-)

-- 
2.7.4