ARM: OMAP: RX-51: change probe order of touchscreen and panel SPI devices
authorAaro Koskinen <aaro.koskinen@iki.fi>
Wed, 8 May 2013 23:48:00 +0000 (16:48 -0700)
committerTony Lindgren <tony@atomide.com>
Wed, 8 May 2013 23:48:00 +0000 (16:48 -0700)
commite65f131a14726e5f1b880a528271a52428e5b3a5
tree5243ba8420703e64b55701559f9e7de2ebca8278
parentcf7dd65811401e3d13fe662f2713860bd8cdb499
ARM: OMAP: RX-51: change probe order of touchscreen and panel SPI devices

Commit 9fdca9df (spi: omap2-mcspi: convert to module_platform_driver)
broke the SPI display/panel driver probe on RX-51/N900. The exact cause is
not fully understood, but it seems to be related to the probe order. SPI
communication to the panel driver (spi1.2) fails unless the touchscreen
(spi1.0) has been probed/initialized before. When the omap2-mcspi driver
was converted to a platform driver, it resulted in that the devices are
probed immediately after the board registers them in the order they are
listed in the board file.

Fix the issue by moving the touchscreen before the panel in the SPI
device list.

The patch fixes the following failure:

[    1.260955] acx565akm spi1.2: invalid display ID
[    1.265899] panel-acx565akm display0: acx_panel_probe panel detect error
[    1.273071] omapdss CORE error: driver probe failed: -19

Tested-by: Sebastian Reichel <sre@debian.org>
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Pali Rohár <pali.rohar@gmail.com>
Cc: Joni Lapilainen <joni.lapilainen@gmail.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: stable@vger.kernel.org
Signed-off-by: Tony Lindgren <tony@atomide.com>
arch/arm/mach-omap2/board-rx51-peripherals.c