[PATCH v2 00/14] ARM: imx7ulp: add cpufreq using cpufreq-dt

From: peng.fan@nxp.com
To: shawnguo@kernel.org, s.hauer@pengutronix.de, sboyd@kernel.org,
	robh+dt@kernel.org, viresh.kumar@linaro.org, rjw@rjwysocki.net
Cc: kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com,
	Anson.Huang@nxp.com, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, abel.vesa@nxp.com,
	Peng Fan <peng.fan@nxp.com>
Subject: [PATCH v2 00/14] ARM: imx7ulp: add cpufreq using cpufreq-dt
Date: Wed, 19 Feb 2020 15:59:43 +0800	[thread overview]
Message-ID: <1582099197-20327-1-git-send-email-peng.fan@nxp.com> (raw)

From: Peng Fan <peng.fan@nxp.com>

V2:
 Per Stephen's comments, I drop the cpuv2 clk code, and find another
 solution to change ARM clk
 Included get_intermediate/target_intermedate for cpufreq-dt
 Add i.MX7ULP intermedidate implementation.
 Per Fabio's comments, disallow HSRUN when LDO enabled.
 Add dt-bindings and pmc node

V1:
 https://patchwork.kernel.org/patch/11364609/

This patchset aims to use cpufreq-dt for i.MX7ULP to avoid
plaform specific cpufreq driver. i.MX7ULP has some specicial
requirements to change ARM core clock, see patch 11/13,
"cpufreq: imx-cpufreq-dt: support i.MX7ULP"

Patch [1,2]/13: add pmc bindings and node. We need read pmc registers
  to get system info.
Patch [3-6]/13: i.MX7ULP clk pfd/pll code change to make sure to get the
  expected pfd output clk. For RUN/HSRUN clock, we use API
  imx_clk_hw_cpu to make sure RUN or HSRUN could not shutdown clock output.

Patch [7-8]/13: Make sure we could run into HSRUN mode and not when LDO
  enabled.

Patch 9/13: let cpufred-dt could have get_intermediate/target_intermediate
  hooks to allow platform specific freq set.

Patch [10-12]/13: i.MX7ULP cpufreq support

Patch 13/13: Test dts, should not apply.

For rpmsg/vitio part, I have posted patchset, if you wanna rpmsg regulator:
https://patchwork.kernel.org/cover/11390481/

Anson Huang (1):
  clk: imx: Fix division by zero warning on pfdv2

Peng Fan (13):
  dt-bindings: fsl: add i.MX7ULP PMC binding doc
  ARM: dts: imx7ulp: add pmc node
  clk: imx: pfdv2: switch to use determine_rate
  clk: imx: pfdv2: determine best parent rate
  clk: imx: pllv4: use prepare/unprepare
  clk: imx7ulp: make it easy to change ARM core clk
  ARM: imx: imx7ulp: support HSRUN mode
  ARM: imx: cpuidle-imx7ulp: Stop mode disallowed when HSRUN
  cpufreq: dt: Allow platform specific intermediate callbacks
  cpufreq: Add i.MX7ULP to cpufreq-dt-platdev blacklist
  cpufreq: imx-cpufreq-dt: support i.MX7ULP
  ARM: imx7ulp: enable cpufreq
  [Do not Apply] ARM: dts: imx7ulp: add cpu OPP points

 .../bindings/arm/freescale/imx7ulp_pmc.yaml        | 32 +++++++++
 arch/arm/boot/dts/imx7ulp.dtsi                     | 38 ++++++++++
 arch/arm/mach-imx/common.h                         |  1 +
 arch/arm/mach-imx/cpuidle-imx7ulp.c                | 14 +++-
 arch/arm/mach-imx/mach-imx7ulp.c                   |  3 +
 arch/arm/mach-imx/pm-imx7ulp.c                     | 25 +++++++
 drivers/clk/imx/clk-imx7ulp.c                      |  6 +-
 drivers/clk/imx/clk-pfdv2.c                        | 61 +++++++++++-----
 drivers/clk/imx/clk-pllv4.c                        | 12 ++--
 drivers/cpufreq/cpufreq-dt-platdev.c               |  1 +
 drivers/cpufreq/cpufreq-dt.c                       |  4 ++
 drivers/cpufreq/cpufreq-dt.h                       |  4 ++
 drivers/cpufreq/imx-cpufreq-dt.c                   | 83 +++++++++++++++++++++-
 include/dt-bindings/clock/imx7ulp-clock.h          |  5 +-
 14 files changed, 257 insertions(+), 32 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/freescale/imx7ulp_pmc.yaml

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2.16.4