linux-kernel - [PATCH v3 0/8] Support spread spectrum clocking for i.MX8{M,N,P} PLLs

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Message-ID: <20241106090549.3684963-1-dario.binacchi@amarulasolutions.com>
Date: Wed,  6 Nov 2024 09:57:56 +0100
From: Dario Binacchi <dario.binacchi@...rulasolutions.com>
To: linux-kernel@...r.kernel.org
Cc: linux-amarula@...rulasolutions.com,
	Dario Binacchi <dario.binacchi@...rulasolutions.com>,
	Abel Vesa <abelvesa@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Fabio Estevam <festevam@...il.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Michael Turquette <mturquette@...libre.com>,
	Peng Fan <peng.fan@....com>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Rob Herring <robh@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>,
	Stephen Boyd <sboyd@...nel.org>,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-clk@...r.kernel.org
Subject: [PATCH v3 0/8] Support spread spectrum clocking for i.MX8{M,N,P} PLLs

The series adds support for spread spectrum clocking for i.MX8M{N,M,P}
PLLs (audio, video and DRAM). It has been tested for the video PLL on
boards using i.MX8MN and i.MX8MP.

Changes in v3:
- Patches 1/8 has been added in version 3. The dt-bindings have
  been moved from fsl,imx8m-anatop.yaml to imx8m-clock.yaml. The
  anatop device (fsl,imx8m-anatop.yaml) is indeed more or less a
  syscon, so it represents a memory area accessible by ccm
  (imx8m-clock.yaml) to setup the PLLs.
- Patches {3,5}/8 have been added in version 3.
- Patches {4,6,8}/8 use ccm device node instead of the anatop one.

Changes in v2:
- Add "allOf:" and place it after "required:" block, like in the
  example schema.
- Move the properties definition to the top-level.
- Drop unit types as requested by the "make dt_binding_check" command.

Dario Binacchi (8):
  dt-bindings: clock: imx8m-clock: support spread spectrum clocking
  clk: imx: pll14xx: support spread spectrum clock generation
  clk: imx: imx8mm: distinguish between ccm and anatop references
  clk: imx8mm: support spread spectrum clock generation
  clk: imx: imx8mn: distinguish between ccm and anatop references
  clk: imx8mn: support spread spectrum clock generation
  clk: imx8mp: don't lose the anatop device node
  clk: imx8mp: support spread spectrum clock generation

 .../bindings/clock/imx8m-clock.yaml           |  46 ++++++++
 drivers/clk/imx/clk-imx8mm.c                  |  99 +++++++++--------
 drivers/clk/imx/clk-imx8mn.c                  | 102 +++++++++---------
 drivers/clk/imx/clk-imx8mp-audiomix.c         |   2 +-
 drivers/clk/imx/clk-imx8mp.c                  |  21 ++--
 drivers/clk/imx/clk-pll14xx.c                 | 102 +++++++++++++++++-
 drivers/clk/imx/clk.h                         |  24 ++++-
 7 files changed, 289 insertions(+), 107 deletions(-)

-- 
2.43.0