[PATCH 00/11] ARM: berlin: refactor chip and system controllers

[Antoine Tenart <antoine.tenart@free-electrons.com>]

Hi,

Marvell Berlin SoCs have a chip control register set providing several
individual registers dealing with various controllers (pinctrl, reset,
clk). This chip controller is described by a single DT node since the
individual registers are spread among the chip control register bank.

Marvell Berlin also have a system control register set providing several
individual registers for pinctrl or adc.

Prior to this series, there was no proper way of probing properly the
devices using one of the chip and system controller nodes. The pinctrl
driver was probed using the DT and the reset controller had an initcall.

This series aims to handle these two nodes correctly, by introducing an
MFD driver, the Berlin controller, to register all the devices described
by the chip and system controller nodes. Syscon is also used to provide
a regmap to the sub-node drivers, so that they can access the registers
of the controllers safely. In addition, the clock driver will need the
regmap early during the boot, so syscon is a good choice here.

Reworks were done in the Berlin pin controller and in the Berlin reset
driver, to take the changes into account (proper compatibles, syscon
helpers, regmap use).

The actual clock driver still works with these modifications, and a
dedicated series will follow to convert the Berlin clock drivers to use
the regmap provided by syscon.

Tested on the Marvell BG2Q DMP.

Thanks!

Antoine

Antoine Tenart (11):
  mfd: add the Berlin controller driver
  Documentation: bindings: add the Berlin controller documentation
  ARM: berlin: select MFD_BERLIN_CTRL
  reset: berlin: convert to a platform driver
  Documentation: bindings: move the Berlin reset documentation
  pinctrl: berlin: use the regmap provided by syscon
  pinctrl: berlin: use proper compatibles
  Documentation: bindings: move the Berlin pinctrl documentation
  ARM: berlin: rework chip and system controller nodes for BG2
  ARM: berlin: rework chip and system controller nodes for BG2CD
  ARM: berlin: rework chip and system controller nodes for BG2Q

 .../devicetree/bindings/arm/marvell,berlin.txt     |  76 ---------
 .../devicetree/bindings/mfd/berlin-ctrl.txt        |  43 +++++
 .../devicetree/bindings/pinctrl/berlin,pinctrl.txt |  43 +++++
 .../devicetree/bindings/reset/berlin,reset.txt     |  23 +++
 arch/arm/boot/dts/berlin2.dtsi                     |  50 +++---
 arch/arm/boot/dts/berlin2cd.dtsi                   |  32 ++--
 arch/arm/boot/dts/berlin2q.dtsi                    |  70 ++++----
 arch/arm/mach-berlin/Kconfig                       |   1 +
 drivers/mfd/Kconfig                                |   5 +
 drivers/mfd/Makefile                               |   2 +
 drivers/mfd/berlin-ctrl.c                          | 180 +++++++++++++++++++++
 drivers/pinctrl/berlin/berlin-bg2.c                |  26 +--
 drivers/pinctrl/berlin/berlin-bg2cd.c              |  26 +--
 drivers/pinctrl/berlin/berlin-bg2q.c               |  26 +--
 drivers/pinctrl/berlin/berlin.c                    |   9 +-
 drivers/reset/reset-berlin.c                       |  69 +++-----
 16 files changed, 429 insertions(+), 252 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mfd/berlin-ctrl.txt
 create mode 100644 Documentation/devicetree/bindings/pinctrl/berlin,pinctrl.txt
 create mode 100644 Documentation/devicetree/bindings/reset/berlin,reset.txt
 create mode 100644 drivers/mfd/berlin-ctrl.c

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2.3.0