Hi,
I forgot to CC: e3-hacking on submission, here is a copy, and a link: http://www.spinics.net/lists/linux-omap/msg22001.html. I'll try to remember about adding to CC: when replying to comments if any.
Thanks, Janusz
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Subject: [RFC][PATCH 0/5] omap1: Amstrad Delta: add support for external keyboard Date: Thursday, 10 December 2009 From: Janusz Krzysztofik jkrzyszt@tis.icnet.pl To: linux-omap@vger.kernel.org
This series of patches adds support for an external keyboard (called mailboard) connected to the Amstrad Delta (E3) videophone.
The series is based on a patch by Matt Callow, created against linux-omap-2.6.19[1], initially submitted to the e3-hacking mailing list in April 2006[2].
Since the keyboard serial clock line is connected to a GPIO line, it generates interrupts every single bit received. In order to handle this correctly, the code makes use of a FIQ hardware feature. Since all MPU GPIO generated interrupts would be converted to FIQ, the handler must include support for all supported MPU GPIO connected devices: the keyboard, a modem and a hook switch.
My modifications to the original patch include: - split into several patches, - refresh against a recent linux version, - a lot of cleanups, mainly to get rid of checkpatch reported issues, - add support for also handling interrupts generated by a GPIO line that the recently added hook switch hangs off.
Created and tested against linux-omap for-next, commit 82f1d8f22f2c65e70206e40a6f17688bf64a892c dated 2009-12-02.
Janusz Krzysztofik(5) omap1: Amstrad Delta: add FIQ handler for serial keyboard port interrupt processing omap1: Amstrad Delta: add a handler for processing interrupts generated by the FIQ routine omap1: Amstrad Delta: use FIQ for processing MPU GPIO interrupts input: serio: add support for Amstrad Delta serial keyboard port omap1: Amstrad Delta: modify defconfig for external keyboard support arch/arm/configs/ams_delta_defconfig | 2 arch/arm/mach-omap1/Kconfig | 8 arch/arm/mach-omap1/Makefile | 3 arch/arm/mach-omap1/ams-delta-fiq-handler.S | 342 +++++++++++++++++++++++ arch/arm/mach-omap1/ams-delta-fiq.c | 175 +++++++++++ arch/arm/mach-omap1/board-ams-delta.c | 6 arch/arm/mach-omap1/include/mach/ams-delta-fiq.h | 56 +++ arch/arm/plat-omap/include/plat/irqs.h | 4 drivers/input/serio/Kconfig | 9 drivers/input/serio/Makefile | 1 drivers/input/serio/ams_delta_keyboard.c | 240 ++++++++++++++++ 11 files changed, 845 insertions(+), 1 deletion(-)
[1] http://the.earth.li/pub/e3/2.6.19/ams-delta-keyboard.patch [2] http://www.earth.li/pipermail/e3-hacking/2006-April/000453.html
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There is one minor issue that I have not dealt with yet: when built with CONFIG_OMAP_RESET_CLOCKS=y, the keyboard driver stops working. I have no idea how I could find which clock I should enable to get it working regardless of boot loader used. Any suggestions?
Thanks, Janusz
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