linux-toradex.git/include/linux/reset.h, branch v5.10-rc3

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

2019-12-05T19:43:31+00:00

Pull ARM SoC driver updates from Olof Johansson:
 "Various driver updates for platforms:

   - A larger set of work on Tegra 2/3 around memory controller and
     regulator features, some fuse cleanups, etc..

   - MMP platform drivers, in particular for USB PHY, and other smaller
     additions.

   - Samsung Exynos 5422 driver for DMC (dynamic memory configuration),
     and ASV (adaptive voltage), allowing the platform to run at more
     optimal operating points.

   - Misc refactorings and support for RZ/G2N and R8A774B1 from Renesas

   - Clock/reset control driver for TI/OMAP

   - Meson-A1 reset controller support

   - Qualcomm sdm845 and sda845 SoC IDs for socinfo"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (150 commits)
  firmware: arm_scmi: Fix doorbell ring logic for !CONFIG_64BIT
  soc: fsl: add RCPM driver
  dt-bindings: fsl: rcpm: Add 'little-endian' and update Chassis definition
  memory: tegra: Consolidate registers definition into common header
  memory: tegra: Ensure timing control debug features are disabled
  memory: tegra: Introduce Tegra30 EMC driver
  memory: tegra: Do not handle error from wait_for_completion_timeout()
  memory: tegra: Increase handshake timeout on Tegra20
  memory: tegra: Print a brief info message about EMC timings
  memory: tegra: Pre-configure debug register on Tegra20
  memory: tegra: Include io.h instead of iopoll.h
  memory: tegra: Adapt for Tegra20 clock driver changes
  memory: tegra: Don't set EMC rate to maximum on probe for Tegra20
  memory: tegra: Add gr2d and gr3d to DRM IOMMU group
  memory: tegra: Set DMA mask based on supported address bits
  soc: at91: Add Atmel SFR SN (Serial Number) support
  memory: atmel-ebi: switch to SPDX license identifiers
  memory: atmel-ebi: move NUM_CS definition inside EBI driver
  soc: mediatek: Refactor bus protection control
  soc: mediatek: Refactor sram control
  ...

reset: document (devm_)reset_control_get_optional variants

2019-10-24T08:51:09+00:00

Add kerneldoc comments for the optional reset_control_get variants.

Signed-off-by: Philipp Zabel

reset: fix reset_control_get_exclusive kerneldoc comment

2019-10-24T08:26:33+00:00

Add missing parentheses to correctly hyperlink the reference to
reset_control_get_shared().

Fixes: 0b52297f2288 ("reset: Add support for shared reset controls")
Reviewed-by: Hans de Goede 
Signed-off-by: Philipp Zabel

reset: fix linux/reset.h errors

2019-04-02T15:57:35+00:00

The header file  uses errno constant(s) and the
ERR_PTR() macro but does not #include the appropriate header files
that provide those facilities, so add 2 header files to fix
build errors.

  CC [M]  drivers/gpu/drm/lima/lima_device.o
In file included from ../drivers/gpu/drm/lima/lima_device.c:5:0:
../include/linux/reset.h: In function ‘__device_reset’:
../include/linux/reset.h:77:25: error: ‘ENOTSUPP’ undeclared (first use in this function)
  return optional ? 0 : -ENOTSUPP;
../include/linux/reset.h:77:25: note: each undeclared identifier is reported only once for each function it appears in
../include/linux/reset.h: In function ‘__of_reset_control_get’:
../include/linux/reset.h:85:36: error: ‘ENOTSUPP’ undeclared (first use in this function)
  return optional ? NULL : ERR_PTR(-ENOTSUPP);
../include/linux/reset.h: In function ‘__reset_control_get’:
../include/linux/reset.h:93:36: error: ‘ENOTSUPP’ undeclared (first use in this function)
  return optional ? NULL : ERR_PTR(-ENOTSUPP);
../include/linux/reset.h: In function ‘__devm_reset_control_get’:
../include/linux/reset.h:101:36: error: ‘ENOTSUPP’ undeclared (first use in this function)
  return optional ? NULL : ERR_PTR(-ENOTSUPP);
../include/linux/reset.h: In function ‘devm_reset_control_array_get’:
../include/linux/reset.h:107:36: error: ‘ENOTSUPP’ undeclared (first use in this function)
  return optional ? NULL : ERR_PTR(-ENOTSUPP);
../include/linux/reset.h: In function ‘of_reset_control_array_get’:
../include/linux/reset.h:114:36: error: ‘ENOTSUPP’ undeclared (first use in this function)
  return optional ? NULL : ERR_PTR(-ENOTSUPP);
In file included from ../drivers/gpu/drm/lima/lima_device.c:5:0:
../include/linux/reset.h: In function ‘__devm_reset_control_get’:
../include/linux/reset.h:102:1: warning: control reaches end of non-void function [-Wreturn-type]
 }

Signed-off-by: Randy Dunlap 
Signed-off-by: Philipp Zabel

reset: Add acquire/release support for arrays

2019-03-20T10:18:53+00:00

Add implementations that apply acquire and release operations to all
reset controls part of a reset control array.

Signed-off-by: Thierry Reding 
Reviewed-by: Philipp Zabel 
Signed-off-by: Philipp Zabel

reset: Add acquired flag to of_reset_control_array_get()

2019-03-20T10:18:36+00:00

In order to be able to request an array of reset controls in acquired or
released mode, add the acquired flag to of_reset_control_array_get() and
pass the flag to subsequent calls of __of_reset_control_get().

Signed-off-by: Thierry Reding 
Acked-by: Felipe Balbi 
Signed-off-by: Philipp Zabel

reset: add acquired/released state for exclusive reset controls

2019-03-20T10:16:55+00:00

There are cases where a driver needs explicit control over a reset line
that is exclusively conneted to its device, but this control has to be
temporarily handed over to the power domain controller to handle reset
requirements during power transitions.
Allow multiple exclusive reset controls to be requested in 'released'
state for the same physical reset line, only one of which can be
acquired at the same time.

Signed-off-by: Philipp Zabel 
Signed-off-by: Thierry Reding

reset: Add reset_control_get_count()

2019-01-07T15:38:26+00:00

Currently the reset core has internal support for counting the number of
resets for a device described in DT.  Generalize this to devices using
lookup resets, and export it for public use.

This will be used by generic drivers that need to be sure a device is
controlled by a single, dedicated reset line (e.g. vfio-platform).

Signed-off-by: Geert Uytterhoeven 
[p.zabel@pengutronix.de: fixed a typo in reset_control_get_count comment]
Signed-off-by: Philipp Zabel

reset: Improve reset controller kernel docs

2019-01-07T15:38:26+00:00

Grammar and indentation fixes.

Signed-off-by: Geert Uytterhoeven 
[p.zabel@pengutronix.de: dropped "shared among" -> "shared between"]
Signed-off-by: Philipp Zabel

reset: Grammar s/more then once/more than once/

2018-10-04T09:36:07+00:00

Fix grammar in reset_control_get_exclusive() documentation comment.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Philipp Zabel