linux-kernel - [PATCH v4 0/8] ARM: davinci: complete the conversion to using the reset framework

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Message-Id: <20180323130455.11470-1-brgl@bgdev.pl>
Date:   Fri, 23 Mar 2018 14:04:47 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Sekhar Nori <nsekhar@...com>, Kevin Hilman <khilman@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        David Lechner <david@...hnology.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Ohad Ben-Cohen <ohad@...ery.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Philipp Zabel <p.zabel@...gutronix.de>
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-remoteproc@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH v4 0/8] ARM: davinci: complete the conversion to using the reset framework

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

This series converts the only user of the handcoded, mach-specific reset
routines in the davinci platform to using the reset framework.

Patch 1 modifies the way lookup entries are registered with the reset
framework.

Patches 2-4 add necessary lookups/DT-properties.

Patches 5-7 convert the davinci-rproc driver to the reset framework.

Patch 8 removes now dead code.

Philipp: it turned out that it's indeed better to use the reset
controller's device name for the entry lookup.

Tested both in DT and legacy modes by booting the examples from
ti-ipc-rtos recipe in meta-ti.

This series applies on top of David Lechner's common-clk-v9 branch[1]
with Philipp Zabel's reset/next branch[2] pulled in.

It can be found in my github tree as well[3].

[1] git://github.com/dlech/ev3dev-kernel.git common-clk-v9
[2] git://git.pengutronix.de/git/pza/linux reset/next
[3] git@...hub.com:brgl/linux.git topic/davinci-reset

v1 -> v2:
- fixed the device tree patches the descriptions of which were mixed up
- return -EPROBE_DEFER from davinci-rproc's probe() if we can't get the
  reset provider, since it's possible that the lookup table was not yet
  registered
- made the local variable naming consistent in the davinci-rproc driver
- fixed a typo in PATCH 5/8

v2 -> v3:
- modify PATCH 1/8: drop the provider argument from the function adding
  lookup entries and instead pass the provider name to the RESET_LOOKUP
  macro, return -EPROBE_DEFER if we locate a correct lookup entry but
  cannot get the corresponding reset controller
- modify the reset lookup entry in psc-da850
- don't manually return -EPROBE_DEFER from davinci-rproc, instead don't
  emit an error message if devm_reset_control_get_exclusive() returns
  this error code

v3 -> v4:
- make index the second parameter in RESET_LOOKUP() (right after the
  provider name)

Bartosz Golaszewski (8):
  reset: modify the way reset lookup works for board files
  ARM: davinci: dts: make psc0 a reset provider
  ARM: davinci: dts: add a reset control to the dsp node
  clk: davinci: add a reset lookup table for psc0
  remoteproc: da8xx: add the missing retval check for clk_enable()
  remoteproc: da8xx: prepare and unprepare the clock where needed
  remoteproc: da8xx: use the reset framework
  clk: davinci: kill davinci_clk_reset_assert/deassert()

 arch/arm/boot/dts/da850.dtsi               |  2 ++
 arch/arm/mach-davinci/include/mach/clock.h | 21 ---------------
 drivers/clk/davinci/psc-da850.c            |  7 +++++
 drivers/clk/davinci/psc.c                  | 19 +-------------
 drivers/remoteproc/da8xx_remoteproc.c      | 42 +++++++++++++++++++++++++-----
 drivers/reset/core.c                       | 38 ++++++++++++++++++++++-----
 include/linux/reset-controller.h           | 14 +++++-----
 7 files changed, 84 insertions(+), 59 deletions(-)
 delete mode 100644 arch/arm/mach-davinci/include/mach/clock.h

-- 
2.16.1