From: Tony Lindgren tony@atomide.com
[ Upstream commit 4abd9930d189dedaa59097144c6d8f623342fa72 ]
Looks like we can have the maxtouch touchscreen stop producing interrupts if an edge interrupt is lost. This can happen easily when the SoC idles as the gpio controller may not see any state for an edge interrupt if it is briefly triggered when the system is idle.
Also it looks like maxtouch stops sending any further interrupts if the interrupt is not handled. And we do have several cases of maxtouch already configured with a level interrupt, so let's do that.
With level interrupt the gpio controller has the interrupt state visible after idle. Note that eventually we will probably also be using the Linux generic wakeirq configured for the controller, but that cannot be done until the maxtouch driver supports runtime PM.
Cc: maemo-leste@lists.dyne.org Cc: Arthur Demchenkov spinal.by@gmail.com Cc: Ivaylo Dimitrov ivo.g.dimitrov.75@gmail.com Cc: Merlijn Wajer merlijn@wizzup.org Cc: Pavel Machek pavel@ucw.cz Cc: Sebastian Reichel sre@kernel.org Signed-off-by: Tony Lindgren tony@atomide.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm/boot/dts/motorola-mapphone-common.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/motorola-mapphone-common.dtsi b/arch/arm/boot/dts/motorola-mapphone-common.dtsi index da6b107da84a4..aeb5a673c209e 100644 --- a/arch/arm/boot/dts/motorola-mapphone-common.dtsi +++ b/arch/arm/boot/dts/motorola-mapphone-common.dtsi @@ -413,7 +413,7 @@ reset-gpios = <&gpio6 13 GPIO_ACTIVE_HIGH>; /* gpio173 */
/* gpio_183 with sys_nirq2 pad as wakeup */ - interrupts-extended = <&gpio6 23 IRQ_TYPE_EDGE_FALLING>, + interrupts-extended = <&gpio6 23 IRQ_TYPE_LEVEL_LOW>, <&omap4_pmx_core 0x160>; interrupt-names = "irq", "wakeup"; wakeup-source;