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arm: mvebu: use global interrupts for GPIOs on Armada XP 

The Armada XP GPIO controller has two ways of notifying interrupts:
using global interrupts or using per-CPU interrupts. In an attempt to
use the best available features, the 'marvell,armadaxp-gpio'
compatible string selects a variant of the gpio-mvebu driver that
makes use of the per-CPU interrupts.

Unfortunately, this doesn't work properly in a SMP context, because we
fall into cases where the GPIO interrupt is enabled on CPU X at the
GPIO controller level, but on CPU Y at the interrupt controller
level. It is not yet clear how to fix that easily.

So for 3.8, our approach is to switch to global interrupts for GPIOs,
so that we do not fall into this per-CPU interrupts problem.

This patch therefore fixes GPIO interrupts on Armada XP
platforms. Without this patch, GPIO interrupts simply do not work
reliably, because their proper operation depends on which CPU the code
requesting the interrupt is running.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Thomas Petazzoni 2013-01-07 17:26:58 +01:00 committed by Jason Cooper
parent ba607b6238
commit 5f79c651e8
3 changed files with 24 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
arch/arm/boot/dts/armada-xp-mv78230.dtsi
View File

@ -50,27 +50,25 @@
};
gpio0: gpio@d0018100 {
compatible = "marvell,armadaxp-gpio";
reg = <0xd0018100 0x40>,
<0xd0018800 0x30>;
compatible = "marvell,orion-gpio";
reg = <0xd0018100 0x40>;
ngpios = <32>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupts-cells = <2>;
interrupts = <16>, <17>, <18>, <19>;
interrupts = <82>, <83>, <84>, <85>;
};
gpio1: gpio@d0018140 {
compatible = "marvell,armadaxp-gpio";
reg = <0xd0018140 0x40>,
<0xd0018840 0x30>;
compatible = "marvell,orion-gpio";
reg = <0xd0018140 0x40>;
ngpios = <17>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupts-cells = <2>;
interrupts = <20>, <21>, <22>;
interrupts = <87>, <88>, <89>;
};
};
};

21
arch/arm/boot/dts/armada-xp-mv78260.dtsi
View File

@ -51,39 +51,36 @@
};
gpio0: gpio@d0018100 {
compatible = "marvell,armadaxp-gpio";
reg = <0xd0018100 0x40>,
<0xd0018800 0x30>;
compatible = "marvell,orion-gpio";
reg = <0xd0018100 0x40>;
ngpios = <32>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupts-cells = <2>;
interrupts = <16>, <17>, <18>, <19>;
interrupts = <82>, <83>, <84>, <85>;
};
gpio1: gpio@d0018140 {
compatible = "marvell,armadaxp-gpio";
reg = <0xd0018140 0x40>,
<0xd0018840 0x30>;
compatible = "marvell,orion-gpio";
reg = <0xd0018140 0x40>;
ngpios = <32>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupts-cells = <2>;
interrupts = <20>, <21>, <22>, <23>;
interrupts = <87>, <88>, <89>, <90>;
};
gpio2: gpio@d0018180 {
compatible = "marvell,armadaxp-gpio";
reg = <0xd0018180 0x40>,
<0xd0018870 0x30>;
compatible = "marvell,orion-gpio";
reg = <0xd0018180 0x40>;
ngpios = <3>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupts-cells = <2>;
interrupts = <24>;
interrupts = <91>;
};
ethernet@d0034000 {

21
arch/arm/boot/dts/armada-xp-mv78460.dtsi
View File

@ -66,39 +66,36 @@
};
gpio0: gpio@d0018100 {
compatible = "marvell,armadaxp-gpio";
reg = <0xd0018100 0x40>,
<0xd0018800 0x30>;
compatible = "marvell,orion-gpio";
reg = <0xd0018100 0x40>;
ngpios = <32>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupts-cells = <2>;
interrupts = <16>, <17>, <18>, <19>;
interrupts = <82>, <83>, <84>, <85>;
};
gpio1: gpio@d0018140 {
compatible = "marvell,armadaxp-gpio";
reg = <0xd0018140 0x40>,
<0xd0018840 0x30>;
compatible = "marvell,orion-gpio";
reg = <0xd0018140 0x40>;
ngpios = <32>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupts-cells = <2>;
interrupts = <20>, <21>, <22>, <23>;
interrupts = <87>, <88>, <89>, <90>;
};
gpio2: gpio@d0018180 {
compatible = "marvell,armadaxp-gpio";
reg = <0xd0018180 0x40>,
<0xd0018870 0x30>;
compatible = "marvell,orion-gpio";
reg = <0xd0018180 0x40>;
ngpios = <3>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupts-cells = <2>;
interrupts = <24>;
interrupts = <91>;
};
ethernet@d0034000 {