[PATCH v6 0/8] Reset controller API to reset IP modules on i.MX5 and i.MX6

[Philipp Zabel]

[Added Arnd and Greg to the recipients] I think the first three patches
of this series are candidates to go through Arnd's tree. Arnd, would you
take those patches?
        [PATCH v6 1/8] dt: describe base reset signal binding
        [PATCH v6 2/8] reset: Add reset controller API
        [PATCH v6 3/8] reset: Add driver for gpio-controlled reset pins

The system reset controller (SRC) on i.MX51, i.MX53, and i.MX6q controls
reset lines to the GPU, VPU, IPU, and OpenVG IP modules.

The following patches add a simple API for devices to request being reset
by separate reset controller hardware and implements the reset signal
device tree binding proposed by Stephen Warren. Contrary to Tegra hardware,
the i.MX SRC contains self-deasserting reset registers, so I've included
both ops to manually assert/deassert a reset line, as well as a "reset"
operation that is supposed to assert the reset line and wait for it to
deassert.

The i.MX SRC is enhanced to provide a reset controller and the IPU driver
is made to request being reset by calling the device_reset(&pdev->dev)
convenience wrapper during probing.

No changes since v5, I just reordered the series.

regards
Philipp

---
 .../devicetree/bindings/reset/fsl,imx-src.txt      |  49 ++++
 .../devicetree/bindings/reset/gpio-reset.txt       |  37 +++
 Documentation/devicetree/bindings/reset/reset.txt  |  75 ++++++
 .../bindings/staging/imx-drm/fsl-imx-drm.txt       |   3 +
 arch/arm/boot/dts/imx51.dtsi                       |   7 +
 arch/arm/boot/dts/imx53.dtsi                       |   7 +
 arch/arm/boot/dts/imx6q.dtsi                       |   1 +
 arch/arm/boot/dts/imx6qdl.dtsi                     |   4 +-
 arch/arm/mach-imx/Kconfig                          |   3 +
 arch/arm/mach-imx/mm-imx5.c                        |   2 +
 arch/arm/mach-imx/src.c                            |  69 ++++-
 drivers/Kconfig                                    |   2 +
 drivers/Makefile                                   |   3 +
 drivers/reset/Kconfig                              |  26 ++
 drivers/reset/Makefile                             |   2 +
 drivers/reset/core.c                               | 297 +++++++++++++++++++++
 drivers/reset/gpio-reset.c                         | 208 +++++++++++++++
 drivers/staging/imx-drm/ipu-v3/ipu-common.c        |  12 +-
 include/linux/reset-controller.h                   |  51 ++++
 include/linux/reset.h                              |  17 ++
 20 files changed, 870 insertions(+), 5 deletions(-)