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    • Janusz Krzysztofik's avatar
      ARM: OMAP1: ams-delta: Don't request unused GPIOs · 1137ceee
      Janusz Krzysztofik authored 
      GPIOs with no kernel drivers can still be used from user space, don't
request them from the board file.
Signed-off-by: default avatarJanusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
      1137ceee
    • Janusz Krzysztofik's avatar
      ARM: OMAP1: ams-delta-fiq: Use <linux/platform_data/gpio-omap.h> · 26683316
      Janusz Krzysztofik authored 
      Instead of defining symbols already defined in
linux/platform_data/gpio-omap.h, use that header file.

Since we include the header into an assembler code, prevent C only bits
from being read in.
Signed-off-by: default avatarJanusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
      26683316
    • Janusz Krzysztofik's avatar
      ARM: OMAP1: ams-delta: register MODEM device earlier · d3e952ad
      Janusz Krzysztofik authored 
      Amstrad Delta MODEM device used to be initialized at arch_initcall
before it was once moved to late_initcall by commit f7519d8c ("ARM:
OMAP1: ams-delta: register latch dependent devices later"). The purpose
of that change was to postpone initialization of devices which depended
on latch2 pins until latch2 converted to GPIO device was ready.

After recent fixes to GPIO handling, it was possible to moove
registration of most of those device back to where they were before.
The same can be safely done with the MODEM device as initialization
of GPIO pins it depends on was moved to machine_init by preceding
patch.

Move registration of the MODEM device to arch_initcall_sync, not to
arch_initcall, so it is never exposed to potential conflict in
registration order hazard against OMAP serial ports.
Signed-off-by: default avatarJanusz Krzysztofik <jmkrzyszt@gmail.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
      d3e952ad
    • Janusz Krzysztofik's avatar
      ARM: OMAP1: ams-delta: initialize latch2 pins to safe values · 1464d031
      Janusz Krzysztofik authored 
      Latch2 pins control a number of on-board devices, namely LCD, NAND,
MODEM and CODEC.  Those pins used to be initialized with safe values
from init_machine before that operation was:
1) moved to late_initcall in preparation for conversion of latch2 to
GPIO device - see commit f7519d8c ("ARM: OMAP1: ams-delta: register
latch dependent devices later"),
2) replaced with non-atomic initialization performed by means of
gpio_request_array() - see commit 937eb4bb ("ARM: OMAP1: ams-delta:
convert latches to basic_mmio_gpio"),
3) made completely asynchronous by delegation of GPIO request
operations performed on subsets of pins to respective device drivers in
subsequent commits.

One visible negative result of that disintegration was corrupt keyboard
data reported by serio driver, recently fixed by commit 41f8fee3
("ARM: OMAP1: ams-delta: Hog "keybrd_dataout" GPIO pin").

Moreover, initialization of LATCH2_PIN_MODEM_CODEC still performed with
ams_delta_latch2_write() wrapper from late_init() is now done on not
requested GPIO pin.

Reintroduce atomic initialization of latch2 pins at machine_init to
prevent from random values potentially corrupting NAND data or maybe
even destroing other hardware.  Also take care of MODEM/CODEC related
pins so MODEM device probe succeeds even if latch2 GPIO device or
dependent regulator is not ready and CODEC can be reached over the
MODEM even if audio driver doesn't take control over
LATCH2_PIN_MODEM_CODEC.

Once done, remove the no longer needed GPIO based implementation of
ams_delta_latch_write() and its frontend macro.
Signed-off-by: default avatarJanusz Krzysztofik <jmkrzyszt@gmail.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
[tony@atomide.com: updated for the header location to remove dependency]
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
      1464d031
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