[PATCH 3/6] ARM: dts: meson8: add the ARM TWD timer

[Martin Blumenstingl]

The Meson8 and Meson8m2 SoC are using four ARM Cortex-A9 cores which
come with a "TWD" (Timer-Watchdog) based timer. This adds support for
the ARM TWD Timer on these two SoCs.

Suggested-by: Carlo Caione <ca...@endlessm.com>
[ rebased patch from Carlo, use IRQ_TYPE_EDGE_RISING instead of
  IRQ_TYPE_LEVEL_LOW to prevent "GIC: PPI13 is secure or misconfigured"
  message during boot, use pre-processor macros to specify the IRQ,
  added the correct clock, dropped TWD watchdog node since there's no
  driver for it anymore ]
Signed-off-by: Martin Blumenstingl <martin.blumensti...@googlemail.com>
---
 arch/arm/boot/dts/meson8.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/boot/dts/meson8.dtsi b/arch/arm/boot/dts/meson8.dtsi
index 28b9f6779993..2b0b3edbd896 100644
--- a/arch/arm/boot/dts/meson8.dtsi
+++ b/arch/arm/boot/dts/meson8.dtsi
@@ -362,6 +362,13 @@
                compatible = "arm,cortex-a9-scu";
                reg = <0x0 0x100>;
        };
+
+       timer@600 {
+               compatible = "arm,cortex-a9-twd-timer";
+               reg = <0x600 0x20>;
+               interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | 
IRQ_TYPE_EDGE_RISING)>;
+               clocks = <&clkc CLKID_PERIPH>;
+       };
 };
 
 &pwm_ab {
-- 
2.19.2