linux-kernel - [PATCH v2 0/8] Add support for i.MX8ULP's SIM LPAV

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Message-ID: <20251017112025.11997-1-laurentiumihalcea111@gmail.com>
Date: Fri, 17 Oct 2025 04:20:17 -0700
From: Laurentiu Mihalcea <laurentiumihalcea111@...il.com>
To: Abel Vesa <abelvesa@...nel.org>,
	Peng Fan <peng.fan@....com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Fabio Estevam <festevam@...il.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Daniel Baluta <daniel.baluta@....com>,
	Shengjiu Wang <shengjiu.wang@....com>
Cc: linux-clk@...r.kernel.org,
	imx@...ts.linux.dev,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Pengutronix Kernel Team <kernel@...gutronix.de>
Subject: [PATCH v2 0/8] Add support for i.MX8ULP's SIM LPAV

From: Laurentiu Mihalcea <laurentiu.mihalcea@....com>

The LPAV System Integration Module (SIM) is an IP found inside i.MX8ULP's
LPAV subsystem, which offers clock gating, reset line
assertion/de-assertion, and various other misc. options.

This series adds support for the IP by introducing a new clock HW provider
driver and by modifying i.MX8MP's AUDIOMIX block control reset driver to
allow it to be used for i.MX8ULP's SIM LPAV as well.

This series is a spin-off from [1].

[1]: https://lore.kernel.org/lkml/20240922174225.75948-1-laurentiumihalcea111@gmail.com/

---
Changes in v2:

* drop redundant description for "#clock-cells"/"#reset-cells" properties
  from binding
* make "mux-controller" and "#reset-cells" properties mandatory
* add "mux-controller" child to binding example node
* drop the compatiblity with syscon - this was never actually needed and
  it was done to allow using "mmio-mux", which requires a syscon parent
* modify the auxiliary reset driver to use regmap - this will allow the
  mux controller, clock control and reset control APIs to use the same
  spinlock
* rename "imx8ulp-reset-sim-lpav.h" to "fsl,imx8ulp-sim-lpav.h"
* drop the "IMX8ULP_CLK_SIM_LPAV_END" macro, which doesn't belong to the
  binding headers
* fix the values of "IMX8MP_AUDIOMIX_EARC_RESET_MASK" and
  "IMX8MP_AUDIOMIX_EARC_PHY_RESET_MASK", which were previously incorrect
* drop redundant macros from auxiliary reset driver - replace their
  occurrences with their values
* squash the binding-related macro additions into the binding patch
* add mux-controller child node to the sim_lpav node
* make the "gates" array static
* link to v1: https://lore.kernel.org/lkml/20250804155407.285353-1-laurentiumihalcea111@gmail.com/
---

Laurentiu Mihalcea (8):
  reset: imx8mp-audiomix: Fix bad mask values
  dt-bindings: clock: document 8ULP's SIM LPAV
  clk: imx: add driver for imx8ulp's sim lpav
  reset: imx8mp-audiomix: Drop unneeded macros
  reset: imx8mp-audiomix: Switch to using regmap API
  reset: imx8mp-audiomix: Extend the driver usage
  reset: imx8mp-audiomix: Support i.MX8ULP SIM LPAV
  arm64: dts: imx8ulp: add sim lpav node

 .../bindings/clock/fsl,imx8ulp-sim-lpav.yaml  |  72 ++++++
 arch/arm64/boot/dts/freescale/imx8ulp.dtsi    |  17 ++
 drivers/clk/imx/Makefile                      |   1 +
 drivers/clk/imx/clk-imx8ulp-sim-lpav.c        | 211 ++++++++++++++++++
 drivers/reset/reset-imx8mp-audiomix.c         | 174 +++++++++++----
 include/dt-bindings/clock/imx8ulp-clock.h     |   5 +
 .../dt-bindings/reset/fsl,imx8ulp-sim-lpav.h  |  16 ++
 7 files changed, 453 insertions(+), 43 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/clock/fsl,imx8ulp-sim-lpav.yaml
 create mode 100644 drivers/clk/imx/clk-imx8ulp-sim-lpav.c
 create mode 100644 include/dt-bindings/reset/fsl,imx8ulp-sim-lpav.h

-- 
2.43.0