This series adds two new drivers in order to better support the LCDC rev1 present on the da850 boards.
The first patch adds a new memory driver which allows to write to the DDR2/mDDR memory controller present on the da8xx SoCs. Since the memory controller region is not mapped by anyone else, I went with platform_get_resource() and ioremap() approach.
The second patch adds a new bus driver which allows to interact with the MSTPRI registers of the SYSCFG0 module. The SYSCFG0 registers are used by many drivers, hence the syscon/regmap approach.
As is mentioned in the comments: we don't want to commit to supporting stable interfaces (DT bindings or sysfs attributes) so we hardcode the settings required by some boards (for now only da850-lcdk) with the hope that linux gets an appropriate framework for performance knobs in the future.
Potential extensions of these drivers should be straightforward in the future.
Tested on a da850-lcdk with a display connected over VGA and some additional work on the tilcdc driver.
NOTE I'm sending this as v1, but it's a follow-up to a series I sent previously and the RFC with the ddrctl driver. I dropped the dt patch for now.
Bartosz Golaszewski (2): ARM: memory: da8xx-ddrctl: new driver ARM: bus: da8xx-mstpri: new driver
.../devicetree/bindings/bus/ti,da850-mstpri.txt | 20 ++ .../memory-controllers/ti-da8xx-ddrctl.txt | 20 ++ drivers/bus/Kconfig | 9 + drivers/bus/Makefile | 2 + drivers/bus/da8xx-mstpri.c | 266 +++++++++++++++++++++ drivers/memory/Kconfig | 8 + drivers/memory/Makefile | 1 + drivers/memory/da8xx-ddrctl.c | 175 ++++++++++++++ 8 files changed, 501 insertions(+) create mode 100644 Documentation/devicetree/bindings/bus/ti,da850-mstpri.txt create mode 100644 Documentation/devicetree/bindings/memory-controllers/ti-da8xx-ddrctl.txt create mode 100644 drivers/bus/da8xx-mstpri.c create mode 100644 drivers/memory/da8xx-ddrctl.c