ARM: at91/dt: at91sam9261: use slow clock where necessary

The watchdog, the reset controller, the real-time timer, the shutdown
controller and the timer counter need the slow clock, add it where
necessary.

Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
diff --git a/arch/arm/boot/dts/at91sam9261.dtsi b/arch/arm/boot/dts/at91sam9261.dtsi
index b2c44a0..ce1e3e9 100644
--- a/arch/arm/boot/dts/at91sam9261.dtsi
+++ b/arch/arm/boot/dts/at91sam9261.dtsi
@@ -119,8 +119,8 @@
 				interrupts = <17 IRQ_TYPE_LEVEL_HIGH 0>,
 					     <18 IRQ_TYPE_LEVEL_HIGH 0>,
 					     <19 IRQ_TYPE_LEVEL_HIGH 0>;
-				clocks = <&tc0_clk>, <&tc1_clk>, <&tc2_clk>;
-				clock-names = "t0_clk", "t1_clk", "t2_clk";
+				clocks = <&tc0_clk>, <&tc1_clk>, <&tc2_clk>, <&slow_xtal>;
+				clock-names = "t0_clk", "t1_clk", "t2_clk", "slow_clk";
 			};
 
 			usb1: gadget@fffa4000 {
@@ -820,11 +820,13 @@
 			rstc@fffffd00 {
 				compatible = "atmel,at91sam9260-rstc";
 				reg = <0xfffffd00 0x10>;
+				clocks = <&slow_xtal>;
 			};
 
 			shdwc@fffffd10 {
 				compatible = "atmel,at91sam9260-shdwc";
 				reg = <0xfffffd10 0x10>;
+				clocks = <&slow_xtal>;
 			};
 
 			pit: timer@fffffd30 {
@@ -846,6 +848,7 @@
 				compatible = "atmel,at91sam9260-wdt";
 				reg = <0xfffffd40 0x10>;
 				interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
+				clocks = <&slow_xtal>;
 				status = "disabled";
 			};