From f3fb49dfccbf7bb7005bd57bb7385c3ee80d8c52 Mon Sep 17 00:00:00 2001 From: Aaro Koskinen Date: Wed, 8 May 2013 16:48:00 -0700 Subject: ARM: OMAP: RX-51: change probe order of touchscreen and panel SPI devices MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit e65f131a14726e5f1b880a528271a52428e5b3a5 upstream. 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 Signed-off-by: Aaro Koskinen Cc: Pali Rohár Cc: Joni Lapilainen Cc: Tomi Valkeinen Cc: Felipe Balbi Signed-off-by: Tony Lindgren Signed-off-by: Greg Kroah-Hartman --- arch/arm/mach-omap2/board-rx51-peripherals.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch') diff --git a/arch/arm/mach-omap2/board-rx51-peripherals.c b/arch/arm/mach-omap2/board-rx51-peripherals.c index c56597172bf..9a1e1f7c109 100644 --- a/arch/arm/mach-omap2/board-rx51-peripherals.c +++ b/arch/arm/mach-omap2/board-rx51-peripherals.c @@ -56,11 +56,11 @@ #define RX51_USB_TRANSCEIVER_RST_GPIO 67 -/* list all spi devices here */ +/* List all SPI devices here. Note that the list/probe order seems to matter! */ enum { RX51_SPI_WL1251, - RX51_SPI_MIPID, /* LCD panel */ RX51_SPI_TSC2005, /* Touch Controller */ + RX51_SPI_MIPID, /* LCD panel */ }; static struct wl12xx_platform_data wl1251_pdata; -- cgit v1.2.3-18-g5258