ARM: dts: Fix omap serial wake-up when booted with device tree

We've had deeper idle states working on omaps for few years now,
but only in the legacy mode. When booted with device tree, the
wake-up events did not have a chance to work until commit
3e6cee17 (pinctrl: single: Add support for wake-up interrupts)
that recently got merged. In addition to that we also needed commit
79d97015 (of/irq: create interrupts-extended property) and
9ec36caf (of/irq: do irq resolution in platform_get_irq) that
are now also merged.

So let's fix the wake-up events for some selected omaps so devices
booted in device tree mode won't just hang if deeper power states
are enabled, and so systems can wake up from suspend to the serial
port event.

Note that there's no longer need to specify the wake-up bit in
the pinctrl settings, the request_irq on the wake-up pin takes
care of that.

Cc: devicetree@vger.kernel.org
Cc: "Benoît Cousson" <bcousson@baylibre.com>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Nishanth Menon <nm@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Tero Kristo <t-kristo@ti.com>
[tony@atomide.com: updated comments, added board LDP]
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap3-evm-37xx.dts

@@ -89,7 +89,16 @@
 	status = "disabled";
 };
 
+&uart1 {
+	interrupts-extended = <&intc 72 &omap3_pmx_core OMAP3_UART1_RX>;
+};
+
+&uart2 {
+	interrupts-extended = <&intc 73 &omap3_pmx_core OMAP3_UART2_RX>;
+};
+
 &uart3 {
+	interrupts-extended = <&intc 74 &omap3_pmx_core OMAP3_UART3_RX>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart3_pins>;
 };

arch/arm/boot/dts/omap3-ldp.dts

@@ -234,6 +234,10 @@
 	};
 };
 
+&uart3 {
+	interrupts-extended = <&intc 74 &omap3_pmx_core OMAP3_UART3_RX>;
+};
+
 &usb_otg_hs {
 	pinctrl-names = "default";
 	pinctrl-0 = <&musb_pins>;

arch/arm/boot/dts/omap3-n900.dts

@@ -618,11 +618,13 @@
 };
 
 &uart2 {
+	interrupts-extended = <&intc 73 &omap3_pmx_core OMAP3_UART2_RX>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart2_pins>;
 };
 
 &uart3 {
+	interrupts-extended = <&intc 74 &omap3_pmx_core OMAP3_UART3_RX>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart3_pins>;
 };

arch/arm/boot/dts/omap3.dtsi

@@ -267,7 +267,7 @@
 		uart1: serial@4806a000 {
 			compatible = "ti,omap3-uart";
 			reg = <0x4806a000 0x2000>;
-			interrupts = <72>;
+			interrupts-extended = <&intc 72>;
 			dmas = <&sdma 49 &sdma 50>;
 			dma-names = "tx", "rx";
 			ti,hwmods = "uart1";
@@ -277,7 +277,7 @@
 		uart2: serial@4806c000 {
 			compatible = "ti,omap3-uart";
 			reg = <0x4806c000 0x400>;
-			interrupts = <73>;
+			interrupts-extended = <&intc 73>;
 			dmas = <&sdma 51 &sdma 52>;
 			dma-names = "tx", "rx";
 			ti,hwmods = "uart2";
@@ -287,7 +287,7 @@
 		uart3: serial@49020000 {
 			compatible = "ti,omap3-uart";
 			reg = <0x49020000 0x400>;
-			interrupts = <74>;
+			interrupts-extended = <&intc 74>;
 			dmas = <&sdma 53 &sdma 54>;
 			dma-names = "tx", "rx";
 			ti,hwmods = "uart3";

arch/arm/boot/dts/omap4-panda-common.dtsi

@@ -481,6 +481,21 @@
 	usb-supply = <&vusb>;
 };
 
+&uart2 {
+	interrupts-extended = <&gic GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH
+			       &omap4_pmx_core OMAP4_UART2_RX>;
+};
+
+&uart3 {
+	interrupts-extended = <&gic GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH
+			       &omap4_pmx_core OMAP4_UART3_RX>;
+};
+
+&uart4 {
+	interrupts-extended = <&gic GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH
+			       &omap4_pmx_core OMAP4_UART4_RX>;
+};
+
 &usb_otg_hs {
 	interface-type = <1>;
 	mode = <3>;

arch/arm/boot/dts/omap4-sdp.dts

@@ -570,16 +570,22 @@
 };
 
 &uart2 {
+	interrupts-extended = <&gic GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH
+			       &omap4_pmx_core OMAP4_UART2_RX>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart2_pins>;
 };
 
 &uart3 {
+	interrupts-extended = <&gic GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH
+			       &omap4_pmx_core OMAP4_UART3_RX>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart3_pins>;
 };
 
 &uart4 {
+	interrupts-extended = <&gic GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH
+			       &omap4_pmx_core OMAP4_UART4_RX>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart4_pins>;
 };

arch/arm/boot/dts/omap4.dtsi

@@ -311,7 +311,7 @@
 		uart2: serial@4806c000 {
 			compatible = "ti,omap4-uart";
 			reg = <0x4806c000 0x100>;
-			interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
+			interrupts-extended = <&gic GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
 			ti,hwmods = "uart2";
 			clock-frequency = <48000000>;
 		};
@@ -319,7 +319,7 @@
 		uart3: serial@48020000 {
 			compatible = "ti,omap4-uart";
 			reg = <0x48020000 0x100>;
-			interrupts = <GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>;
+			interrupts-extended = <&gic GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>;
 			ti,hwmods = "uart3";
 			clock-frequency = <48000000>;
 		};
@@ -327,7 +327,7 @@
 		uart4: serial@4806e000 {
 			compatible = "ti,omap4-uart";
 			reg = <0x4806e000 0x100>;
-			interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>;
+			interrupts-extended = <&gic GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>;
 			ti,hwmods = "uart4";
 			clock-frequency = <48000000>;
 		};

include/dt-bindings/pinctrl/omap.h

@@ -69,5 +69,17 @@
 #define OMAP5_WKUP_IOPAD(pa, val)	OMAP_IOPAD_OFFSET((pa), 0xc840) (val)
 #define DRA7XX_CORE_IOPAD(pa, val)	OMAP_IOPAD_OFFSET((pa), 0x3400) (val)
 
+/*
+ * Define some commonly used pins configured by the boards.
+ * Note that some boards use alternative pins, so check
+ * the schematics before using these.
+ */
+#define OMAP3_UART1_RX		0x152
+#define OMAP3_UART2_RX		0x14a
+#define OMAP3_UART3_RX		0x16e
+#define OMAP4_UART2_RX		0xdc
+#define OMAP4_UART3_RX		0x104
+#define OMAP4_UART4_RX		0x11c
+
 #endif