This is a note to let you know that I've just added the patch titled
ARM: OMAP: RX-51: change probe order of touchscreen and panel SPI devices
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-omap-rx-51-change-probe-order-of-touchscreen-and-panel-spi-devices.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e65f131a14726e5f1b880a528271a52428e5b3a5 Mon Sep 17 00:00:00 2001
From: Aaro Koskinen <aaro.koskinen@xxxxxx>
Date: Wed, 8 May 2013 16:48:00 -0700
Subject: ARM: OMAP: RX-51: change probe order of touchscreen and panel SPI devices
From: Aaro Koskinen <aaro.koskinen@xxxxxx>
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 <sre@xxxxxxxxxx>
Signed-off-by: Aaro Koskinen <aaro.koskinen@xxxxxx>
Cc: Pali Rohár <pali.rohar@xxxxxxxxx>
Cc: Joni Lapilainen <joni.lapilainen@xxxxxxxxx>
Cc: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Cc: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-omap2/board-rx51-peripherals.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/arm/mach-omap2/board-rx51-peripherals.c
+++ b/arch/arm/mach-omap2/board-rx51-peripherals.c
@@ -63,11 +63,11 @@
#define RX51_TSC2005_RESET_GPIO 104
#define RX51_TSC2005_IRQ_GPIO 100
-/* 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;
Patches currently in stable-queue which might be from aaro.koskinen@xxxxxx are
queue-3.4/arm-omap-rx-51-change-probe-order-of-touchscreen-and-panel-spi-devices.patch
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