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SubjectRe: [PATCH/RFC 0/6] staging: board: armadillo800eva: Board staging for sh_mobile_lcdc_fb
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Hello Geert,

Thank you for the patches.

On Friday 03 April 2015 14:41:57 Geert Uytterhoeven wrote:
> Hi all,
>
> This RFC patch series adds board staging support for r8a7740/armadillo.
> For now this supports only the frame buffer device for the on-board LCD.

I've started adding DT support to the shmob-lcdc driver, but I have no board
to test it on. My Armadillo is gone, and KZM9G is unusable with DT + LCDC at
the moment as the LCDC interrupt is connected to the legacy interrupt
controller only, not the GIC. Would you be able to test a patch set ? And if
you want to implement support for the KZM9G legacy interrupt controller in DT,
please go for it :-)

> The goal is to complete the move to ARM multiplatform kernels for all
> shmobile platforms, and drop the existing board files
> (arch/arm/mach-shmobile/board-*).
>
> The board staging area was introduced last year to allow continuous
> upstream in-tree development and integration of platform devices. It
> helps developers integrate devices as platform devices for device
> drivers that only provide platform device bindings. This in turn allows
> for incremental development of both hardware feature support and DT
> binding work in parallel.
>
> This series consists of 4 parts:
> - Patch 1 re-enables compilation of the board staging area, which was
> disabled after a compile breakage, but has been fixed in the mean
> time,
> - Path 2 moves initialization of staging board code to an earlier
> moment, as currently it happens after unused PM domains are powered
> down,
> - Patches 3 and 4 (hopefully) fix the existing kzm9d board staging
> code, which was presumably broken by commit 9a1091ef0017c40a
> ("irqchip: gic: Support hierarchy irq domain."),
> - Patches 5 and 6 add support for registering platform devices with
> complex dependencies (clocks, pinctrl, gpios, PM domains), and add
> armadillo board staging code for enabling a frame buffer on the
> on-board LCD.
>
> Questions:
> - Are there other devices from board-armadillo.c that work fine in
> armadillo-legacy, and that we want to add?
> I think this is the list of devices lacking DT support and/or
> missing in DTS:
> - renesas_usbhs (does this work? the platform device is
> instantiated conditionally, but the condition (gpio state) is
> never true?)
> - sh-mobile-hdmi/sh_mobile_lcdc_fb.1 (this seems to be broken in
> -legacy?)

HDMI is broken in legacy, we can thus drop it.

> - sdhi1 (we do have sdhi0)
> - mmcif
> - soc-camera-pdrv/sh_mobile_ceu
> - ipmmu
> - sh-dma-engine (this will probably never get DT support)
>
> - What about support for other boards (kzm9g, bockw, marzen)?

At this point it becomes a budget question, we can certainly port them to DT,
but it might not make sense to spend time on that. I'll let Magnus chime in.

> This was tested on r8a7740/armadillo.
> This was not tested on emev2/kzm9d, due to lack of hardware.
>
> Thanks for your comments!
>
> Geert Uytterhoeven (6):
> Revert "staging: board: disable as it breaks the build"
> [RFC] staging: board: Initialize staging board code earlier
> [RFC] staging: board: Add support for translating hwirq to virq numbers
> [RFC] staging: board: kzm9d: Translate hwirq numbers to virq numbers
> [RFC] staging: board: Add support for devices with complex dependencies
> [RFC] staging: board: armadillo800eva: Board staging for sh_mobile_lcdc_fb
>
> drivers/staging/board/Kconfig | 1 -
> drivers/staging/board/Makefile | 3 +-
> drivers/staging/board/armadillo800eva.c | 124 ++++++++++++++++++++++++++++
> drivers/staging/board/board.c | 142 +++++++++++++++++++++++++++++
> drivers/staging/board/board.h | 38 ++++++++-
> drivers/staging/board/kzm9d.c | 10 ++-
> 6 files changed, 313 insertions(+), 5 deletions(-)
> create mode 100644 drivers/staging/board/armadillo800eva.c

--
Regards,

Laurent Pinchart



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