[PATCH v5 4/8] ARM: shmobile: r7s72100: Add MTU2 device to DT

[Simon Horman]

On Wed, Jul 09, 2014 at 03:12:40PM +0200, Laurent Pinchart wrote:
> Add the MTU2 counter to the r7s72100 device tree and make it disabled by
> default.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
> ---
>  arch/arm/boot/dts/r7s72100.dtsi | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/r7s72100.dtsi b/arch/arm/boot/dts/r7s72100.dtsi
> index bdee225..c902b0b 100644
> --- a/arch/arm/boot/dts/r7s72100.dtsi
> +++ b/arch/arm/boot/dts/r7s72100.dtsi
> @@ -229,6 +229,16 @@
>  		status = "disabled";
>  	};
>  
> +	mtu2: timer at fcff0000 {
> +		compatible = "renesas,mtu2";
> +		reg = <0xfcff0000 0x400>;
> +		interrupts = <0 139 IRQ_TYPE_LEVEL_HIGH>;
> +		interrupt-names = "tgi0a";
> +		clocks = <&mstp3_clks R7S72100_CLK_MTU2>;
> +		clock-names = "fck";
> +		status = "disabled";
> +	};
> +
>  	scif0: serial at e8007000 {
>  		compatible = "renesas,scif-r7s72100", "renesas,scif";
>  		reg = <0xe8007000 64>;

I believe that I claimed to have tested this in the past but that
my testing was by booting a config to userspace that as it happens
did not require to timer to get that far.

I now believe there is a minor error: the interrupt number should be
(139 - 32 =) 107 rather than 139.

This allows a system with this and the related genmai patch applied
on top of renesas-next-v3.16-rc3-20140715 to boot to uerspace
when compiled with shmobile_defconfig (+ an initrd).
Without the irq number change the boot gets stuck in
ip_auto_config (which presumably sleeps).

Laurent, should I squash the following in and queue-up the result?

diff --git a/arch/arm/boot/dts/r7s72100.dtsi b/arch/arm/boot/dts/r7s72100.dtsi
index c902b0b..1d28d01 100644
--- a/arch/arm/boot/dts/r7s72100.dtsi
+++ b/arch/arm/boot/dts/r7s72100.dtsi
@@ -232,7 +232,7 @@
 	mtu2: timer at fcff0000 {
 		compatible = "renesas,mtu2";
 		reg = <0xfcff0000 0x400>;
-		interrupts = <0 139 IRQ_TYPE_LEVEL_HIGH>;
+		interrupts = <0 107 IRQ_TYPE_LEVEL_HIGH>;
 		interrupt-names = "tgi0a";
 		clocks = <&mstp3_clks R7S72100_CLK_MTU2>;
 		clock-names = "fck";