[PATCH v3 00/16] MIPS: lantiq: handle RCU register by separate drivers

Hauke Mehrtens hauke at hauke-m.de
Sun May 28 11:39:50 PDT 2017

The RCU (Reset controller Unit) register block provides many different 
functionalities. Before they were handed by the code in arch/mips/lantiq
/xway/reset.c, now there are separate drivers for the functionality.
This block provides support for reset controller, GPHY firmware 
loading, USB PHY initialization and cross bar configuration. 

These changes are making the old device tree incompatible with the 
current kernel. The upstream Linux kernel supports loading the device 
tree blob from the boot loader since about one year, the latest 
released vendor kernel does not support loading the device tree from a 
bot loader.

I would prefer if this would go through the mips tree.
There are more patches planed which would convert the Lantiq code 
to the common clock framework.

This is based on patches from Martin Blumenstingl and is a preparation 
to convert the Lantiq target to the common clock framework which was 
also started by Martin Blumenstingl.

 * renamed xbar driver into fpi-bus driver and make it manage the bus,
   this way we make sure it is initialized before the child drivers.
 * converted the lantiq,rcu-syscon into a "regmap" and an "offset"
   property, this way we have a offset property for each register we
   want to access on the regmap.
 * make the gphy PUM clock mandatory.
 * renamed the lantiq,rcu-reset to lantiq,reset-xrx200
 * add binding description for watchdog driver
 * make watchdog driver use offset and mask to find the correct
   register to get the watchdog reset cause bit.
 * use of_platform_default_populate() instead of of_platform_populate()
 * use device_property_read_u32() instead of
 * changed John's email address to blogic at phrozen.org
 * check the reset bit numbers in the xlate function
 * use platform_get_resource() in FPI bus driver
 * make it possible to unload the GPHY driver

 * remove the rcu_ prefix for device names in device tree
 * add both clocks to the gphy driver documentation
 * use 2 cells for the reset controller, one for the status bit and one
   for the set bit, they are different for some reset bits.
   reset-status and reset-request attribute were removed then.
 * remove the documentation of the not existing sub nodes of the usb phy
 * remove manual gpio vbus handling in the usb phy driver and use the
   generic phy regulator now.
 * do not check if the usb phy reset is not null, the reset framework does this.
 * do not print an error message when -EPROBE_DEFER was returned

Hauke Mehrtens (8):
  mtd: lantiq-flash: drop check of boot select
  mtd: spi-falcon: drop check of boot select
  watchdog: lantiq: access boot cause register through regmap
  watchdog: lantiq: add device tree binding documentation
  MIPS: lantiq: remove ltq_reset_cause() and ltq_boot_select()
  MIPS: lantiq: remove old reset controller implementation
  MIPS: lantiq: remove old GPHY loader code
  MIPS: lantiq: remove old USB PHY initialisation

Martin Blumenstingl (8):
  MIPS: lantiq: Use of_platform_default_populate instead of
  MIPS: lantiq: Enable MFD_SYSCON to be able to use it for the RCU MFD
  Documentation: DT: MIPS: lantiq: Add docs for the RCU bindings
  MIPS: lantiq: Convert the fpi bus driver to a platform_driver
  reset: Add a reset controller driver for the Lantiq XWAY based SoCs
  MIPS: lantiq: Add a GPHY driver which uses the RCU syscon-mfd
  phy: Add an USB PHY driver for the Lantiq SoCs using the RCU module
  MIPS: lantiq: Remove the arch/mips/lantiq/xway/reset.c implementation

 .../devicetree/bindings/mips/lantiq/fpi-bus.txt    |  33 ++
 .../devicetree/bindings/mips/lantiq/rcu-gphy.txt   |  38 ++
 .../devicetree/bindings/mips/lantiq/rcu.txt        |  97 ++++++
 .../bindings/phy/phy-lantiq-rcu-usb2.txt           |  42 +++
 .../devicetree/bindings/reset/lantiq,reset.txt     |  30 ++
 .../devicetree/bindings/watchdog/lantiq-wdt.txt    |  28 ++
 MAINTAINERS                                        |   1 +
 arch/mips/include/asm/mach-lantiq/lantiq.h         |   4 -
 arch/mips/lantiq/Kconfig                           |   2 +
 arch/mips/lantiq/falcon/reset.c                    |  22 --
 arch/mips/lantiq/prom.c                            |   2 +-
 arch/mips/lantiq/xway/Makefile                     |   4 +-
 arch/mips/lantiq/xway/reset.c                      | 387 ---------------------
 arch/mips/lantiq/xway/sysctrl.c                    |  71 +---
 arch/mips/lantiq/xway/xrx200_phy_fw.c              | 113 ------
 drivers/mtd/maps/lantiq-flash.c                    |   6 -
 drivers/phy/Kconfig                                |   8 +
 drivers/phy/Makefile                               |   1 +
 drivers/phy/phy-lantiq-rcu-usb2.c                  | 275 +++++++++++++++
 drivers/reset/Kconfig                              |   6 +
 drivers/reset/Makefile                             |   1 +
 drivers/reset/reset-lantiq.c                       | 205 +++++++++++
 drivers/soc/Makefile                               |   1 +
 drivers/soc/lantiq/Makefile                        |   2 +
 drivers/soc/lantiq/fpi-bus.c                       |  91 +++++
 drivers/soc/lantiq/gphy.c                          | 277 +++++++++++++++
 drivers/spi/spi-falcon.c                           |   5 -
 drivers/watchdog/lantiq_wdt.c                      |  45 ++-
 include/dt-bindings/mips/lantiq_rcu_gphy.h         |  15 +
 29 files changed, 1212 insertions(+), 600 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mips/lantiq/fpi-bus.txt
 create mode 100644 Documentation/devicetree/bindings/mips/lantiq/rcu-gphy.txt
 create mode 100644 Documentation/devicetree/bindings/mips/lantiq/rcu.txt
 create mode 100644 Documentation/devicetree/bindings/phy/phy-lantiq-rcu-usb2.txt
 create mode 100644 Documentation/devicetree/bindings/reset/lantiq,reset.txt
 create mode 100644 Documentation/devicetree/bindings/watchdog/lantiq-wdt.txt
 delete mode 100644 arch/mips/lantiq/xway/reset.c
 delete mode 100644 arch/mips/lantiq/xway/xrx200_phy_fw.c
 create mode 100644 drivers/phy/phy-lantiq-rcu-usb2.c
 create mode 100644 drivers/reset/reset-lantiq.c
 create mode 100644 drivers/soc/lantiq/Makefile
 create mode 100644 drivers/soc/lantiq/fpi-bus.c
 create mode 100644 drivers/soc/lantiq/gphy.c
 create mode 100644 include/dt-bindings/mips/lantiq_rcu_gphy.h


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