linux-stable.git/drivers/reset/reset-imx7.c, branch linux-rolling-stable

reset: imx7: Correct polarity of MIPI CSI resets on i.MX8MQ

2026-07-24T14:21:22+00:00

commit 71827776667f4e4677a4fa806bcfb24d4b8dd9d7 upstream.

On i.MX8MQ, the MIPI CSI reset lines are active-low and not self-clearing.
Writing '0' asserts reset and it remains asserted until explicitly
deasserted by software.

This driver previously treated the MIPI CSI reset signals as active-high,
which led to incorrect reset assert/deassert sequencing. This issue was
exposed by commit 6d79bb8fd2aa ("media: imx8mq-mipi-csi2: Explicitly
release reset").

Fix this by reflecting the correct reset polarity and ensuring proper
reset handling.

Fixes: c979dbf59987 ("reset: imx7: Add support for i.MX8MQ IP block variant")
Cc: stable@vger.kernel.org # 6d79bb8fd2aa: media: imx8mq-mipi-csi2: Explicitly release reset
Reviewed-by: Philipp Zabel 
Signed-off-by: Robby Cai 
Reviewed-by: Guoniu Zhou 
Reviewed-by: Frank Li 
Signed-off-by: Philipp Zabel 
Signed-off-by: Greg Kroah-Hartman

reset: Explicitly include correct DT includes

2023-07-28T15:36:20+00:00

The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring 
Reviewed-by: Damien Le Moal 
Acked-by: Steen Hegelund 
Link: https://lore.kernel.org/r/20230714174939.4063667-1-robh@kernel.org
Signed-off-by: Philipp Zabel

reset: imx7: Fix the iMX8MP PCIe PHY PERST support

2022-08-30T14:28:48+00:00

On i.MX7/iMX8MM/iMX8MQ, the initialized default value of PERST bit(BIT3)
of SRC_PCIEPHY_RCR is 1b'1.
But i.MX8MP has one inversed default value 1b'0 of PERST bit.

And the PERST bit should be kept 1b'1 after power and clocks are stable.
So fix the i.MX8MP PCIe PHY PERST support here.

Fixes: e08672c03981 ("reset: imx7: Add support for i.MX8MP SoC")
Signed-off-by: Richard Zhu 
Reviewed-by: Philipp Zabel 
Tested-by: Marek Vasut 
Tested-by: Richard Leitner 
Tested-by: Alexander Stein 
Signed-off-by: Philipp Zabel 
Link: https://lore.kernel.org/r/1661845564-11373-5-git-send-email-hongxing.zhu@nxp.com

Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2020-10-24T17:39:22+00:00

Pull ARM SoC-related driver updates from Olof Johansson:
 "Various driver updates for platforms. A bulk of this is smaller fixes
  or cleanups, but some of the new material this time around is:

   - Support for Nvidia Tegra234 SoC

   - Ring accelerator support for TI AM65x

   - PRUSS driver for TI platforms

   - Renesas support for R-Car V3U SoC

   - Reset support for Cortex-M4 processor on i.MX8MQ

  There are also new socinfo entries for a handful of different SoCs and
  platforms"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (131 commits)
  drm/mediatek: reduce clear event
  soc: mediatek: cmdq: add clear option in cmdq_pkt_wfe api
  soc: mediatek: cmdq: add jump function
  soc: mediatek: cmdq: add write_s_mask value function
  soc: mediatek: cmdq: add write_s value function
  soc: mediatek: cmdq: add read_s function
  soc: mediatek: cmdq: add write_s_mask function
  soc: mediatek: cmdq: add write_s function
  soc: mediatek: cmdq: add address shift in jump
  soc: mediatek: mtk-infracfg: Fix kerneldoc
  soc: amlogic: pm-domains: use always-on flag
  reset: sti: reset-syscfg: fix struct description warnings
  reset: imx7: add the cm4 reset for i.MX8MQ
  dt-bindings: reset: imx8mq: add m4 reset
  reset: Fix and extend kerneldoc
  reset: reset-zynqmp: Added support for Versal platform
  dt-bindings: reset: Updated binding for Versal reset driver
  reset: imx7: Support module build
  soc: fsl: qe: Remove unnessesary check in ucc_set_tdm_rxtx_clk
  soc: fsl: qman: convert to use be32_add_cpu()
  ...

reset: imx7: add the cm4 reset for i.MX8MQ

2020-09-23T12:25:31+00:00

Add the cm4 reset used by the remoteproc driver

Signed-off-by: Peng Fan 
Signed-off-by: Philipp Zabel

reset: imx7: Support module build

2020-09-23T12:25:31+00:00

Use module_platform_driver(), add module device table, author,
description and license to support module build, and
CONFIG_RESET_IMX7 is changed to default 'y' ONLY for i.MX7D,
other platforms need to select it in defconfig.

Signed-off-by: Anson Huang 
Signed-off-by: Philipp Zabel

treewide: Use fallthrough pseudo-keyword

2020-08-23T22:36:59+00:00

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva

reset: imx7: Add support for i.MX8MP SoC

2020-05-06T10:03:43+00:00

i.MX8MP is a new SoC of i.MX8M family, it has same src IP
inside but with different module layout, add support for it.

Signed-off-by: Anson Huang 
Signed-off-by: Philipp Zabel

dt-bindings: reset: Fix typo in imx8mq resets

2019-08-01T08:49:18+00:00

Some of the mipi dsi resets were called

  IMX8MQ_RESET_MIPI_DIS__

instead of

  IMX8MQ_RESET_MIPI_DSI__

Since they're DSI related this looks like a typo. This fixes the
only in tree user as well to not break bisecting.

Signed-off-by: Guido Günther 
Reviewed-by: Lucas Stach 
Signed-off-by: Philipp Zabel

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 285

2019-06-05T15:36:37+00:00

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation version 2 of the license this program
  is distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 100 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Alexios Zavras 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141900.918357685@linutronix.de
Signed-off-by: Greg Kroah-Hartman