• Aaro Koskinen's avatar
    ARM: OMAP: RX-51: change probe order of touchscreen and panel SPI devices · e65f131a
    Aaro Koskinen authored
    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: default avatarSebastian Reichel <sre@debian.org>
    Signed-off-by: default avatarAaro 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: default avatarTony Lindgren <tony@atomide.com>
    e65f131a
board-rx51-peripherals.c 33.5 KB