pinctrl: samsung: Use per-bank IRQ domain for wake-up interrupts

This patch reworks wake-up interrupt handling in pinctrl-exynos driver,
so each pin bank, which provides wake-up interrupts, has its own IRQ
domain.

Information about whether given pin bank provides wake-up interrupts,
how many and whether they are separate or muxed are parsed from device
tree.

It gives following advantages:
  - interrupts can be specified in device tree in a more readable way,
    e.g. :
    	device {
		/* ... */
		interrupt-parent = <&gpx2>;
		interrupts = <4 0>;
		/* ... */
	};
  - the amount and layout of interrupts is not hardcoded in the code
    anymore, but defined in SoC-specific structure
  - bank and pin of each wake-up interrupt can be easily identified, to
    allow operations, such as setting the pin to EINT function, from
    irq_set_type() callback

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/exynos4210-pinctrl.dtsi b/arch/arm/boot/dts/exynos4210-pinctrl.dtsi
index f207d8d69170..6a4a1a04221c 100644
--- a/arch/arm/boot/dts/exynos4210-pinctrl.dtsi
+++ b/arch/arm/boot/dts/exynos4210-pinctrl.dtsi
@@ -445,6 +445,9 @@
 			#gpio-cells = <2>;
 
 			interrupt-controller;
+			interrupt-parent = <&gic>;
+			interrupts = <0 16 0>, <0 17 0>, <0 18 0>, <0 19 0>,
+				     <0 20 0>, <0 21 0>, <0 22 0>, <0 23 0>;
 			#interrupt-cells = <2>;
 		};
 
@@ -453,6 +456,9 @@
 			#gpio-cells = <2>;
 
 			interrupt-controller;
+			interrupt-parent = <&gic>;
+			interrupts = <0 24 0>, <0 25 0>, <0 26 0>, <0 27 0>,
+				     <0 28 0>, <0 29 0>, <0 30 0>, <0 31 0>;
 			#interrupt-cells = <2>;
 		};