[PATCH v6 0/5] Add support for i.MX8ULP's SIM LPAV

[Laurentiu Mihalcea <laurentiumihalcea111@gmail.com>]

From: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.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 v6:

* store a "const struct imx8mp_reset_map" pointer instead of
  a "const struct imx8mp_reset_info" pointer in
  "struct imx8mp_audiomix_reset"
* switch back to the mask-based approach
* link to v5: https://lore.kernel.org/lkml/20251114133738.1762-1-laurentiumihalcea111@gmail.com/

Changes in v5:

* drop patches that were already picked up by Philipp/Abel.
* include the "bits.h" header.
* replace mask with bit index.
* link to v4: https://lore.kernel.org/lkml/20251104120301.913-1-laurentiumihalcea111@gmail.com/

Changes in v4:

* shorten commit message for patch 5
* drop base from "struct imx8mp_audiomix_reset" and use local variable
* imx8mp_audiomix_reset_get_regmap() now takes "struct imx8mp_audiomix_reset *"
  as its argument instead of a "struct device *"
* use base pointer as the data argument for devm_add_action_or_reset()
* shorten commit message for patch 6
* drop regmap field from "struct clk_imx8ulp_sim_lpav_data", use local
  variable and let devres manage it
* drop base field from "struct clk_imx8ulp_sim_lpav_data", use local
  variable and let devres manage it.
* CONFIG_CLK_IMX8ULP now selects CONFIG_AUXILIARY_BUS, which is needed
  for devm_auxiliary_device_create().
* drop static definition of "struct regmap_config" and change to using
  local one in the clock driver.
* link to v3: https://lore.kernel.org/lkml/20251029135229.890-1-laurentiumihalcea111@gmail.com/

Changes in v3:

* rename "lpav_bus", "hifi_core", and "hifi_plat" to "bus", "core", "plat"
* don't assign the "name" field of "struct clk_parent_data". Previously, we
  were assigning the local parent name to this field, which wouldn't have
  worked anyways if, for whatever reason, the fallback mechanism would kick in.
* replace the whole auxiliary reset driver creation chunk by
  a single devm_auxiliary_device_create() call.
* replace the "shift" field from "struct imx8mp_reset_map" with the usage of
  ffs()
* shorten commit description for patch 6
* cast "id->driver_data" to "void *" instead of the previous
  "const struct imx8mp_reset_info *", which makes the line shorter.
* open question resulting from Peng Fan's comment on V2: how to access
  interconnect QoS registers? do we need to model the sim_lpav as an
  interconnect provider as well or is it fine to have another interconnect
  provider that references the sim_lpav node and accesses its registers
  via regmap (dev_get_regmap(), specifically, NOT syscon).
* link to v2: https://lore.kernel.org/lkml/20251017112025.11997-1-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 (5):
  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

 arch/arm64/boot/dts/freescale/imx8ulp.dtsi |  17 +++
 drivers/reset/reset-imx8mp-audiomix.c      | 169 +++++++++++++++------
 2 files changed, 142 insertions(+), 44 deletions(-)

-- 
2.43.0