Re: [PATCH v2 04/10] arm64: dts: mediatek: add mt6797 support

[Marc Zyngier]

On 06/02/17 12:15, Mars Cheng wrote:
> This adds basic chip support for MT6797 SoC.
> 
> Signed-off-by: Mars Cheng <mars.cheng@xxxxxxxxxxxx>
> ---
>  arch/arm64/boot/dts/mediatek/Makefile       |    1 +
>  arch/arm64/boot/dts/mediatek/mt6797-evb.dts |   36 ++++++
>  arch/arm64/boot/dts/mediatek/mt6797.dtsi    |  187 +++++++++++++++++++++++++++
>  3 files changed, 224 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/mediatek/mt6797-evb.dts
>  create mode 100644 arch/arm64/boot/dts/mediatek/mt6797.dtsi
> 
> diff --git a/arch/arm64/boot/dts/mediatek/Makefile b/arch/arm64/boot/dts/mediatek/Makefile
> index 9fbfd32..015eb07 100644
> --- a/arch/arm64/boot/dts/mediatek/Makefile
> +++ b/arch/arm64/boot/dts/mediatek/Makefile
> @@ -1,5 +1,6 @@
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt6755-evb.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt6795-evb.dtb
> +dtb-$(CONFIG_ARCH_MEDIATEK) += mt6797-evb.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt8173-evb.dtb
>  
>  always		:= $(dtb-y)
> diff --git a/arch/arm64/boot/dts/mediatek/mt6797-evb.dts b/arch/arm64/boot/dts/mediatek/mt6797-evb.dts
> new file mode 100644
> index 0000000..c79109c
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt6797-evb.dts

[...]

> +	timer {
> +		compatible = "arm,armv8-timer";
> +		interrupt-parent = <&gic>;
> +		interrupts = <GIC_PPI 13
> +			     (GIC_CPU_MASK_SIMPLE(10) | IRQ_TYPE_LEVEL_LOW)>,

That's exactly why I positively hate these GIC_CPU_MASK_SIMPLE() and co.
They just hide all kind of sins:
- With GICv1/v2, this field can only be 8bit wide. Good luck shoving 10
CPUs there.
- GICv3 *doesn't* have any affinity bitmap in the binding (it can be
expressed in a very different way).

So please get rid of this GIC_CPU_MASK_SIMPLE, it is just wrong.

> +			     <GIC_PPI 14
> +			     (GIC_CPU_MASK_SIMPLE(10) | IRQ_TYPE_LEVEL_LOW)>,
> +			     <GIC_PPI 11
> +			     (GIC_CPU_MASK_SIMPLE(10) | IRQ_TYPE_LEVEL_LOW)>,
> +			     <GIC_PPI 10
> +			     (GIC_CPU_MASK_SIMPLE(10) | IRQ_TYPE_LEVEL_LOW)>;
> +	};
> +
> +	sysirq: intpol-controller@10200620 {
> +		compatible = "mediatek,mt6797-sysirq",
> +			     "mediatek,mt6577-sysirq";
> +		interrupt-controller;
> +		#interrupt-cells = <3>;
> +		#intpol-bases = <2>;
> +		interrupt-parent = <&gic>;
> +		reg = <0 0x10220620 0 0x20>,
> +		      <0 0x10220690 0 0x10>;
> +	};
> +
> +	uart0: serial@11002000 {
> +		compatible = "mediatek,mt6797-uart",
> +			     "mediatek,mt6577-uart";
> +		reg = <0 0x11002000 0 0x400>;
> +		interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_LOW>;
> +		clocks = <&clk26m>;
> +		status = "disabled";
> +	};
> +
> +	uart1: serial@11003000 {
> +		compatible = "mediatek,mt6797-uart",
> +			     "mediatek,mt6577-uart";
> +		reg = <0 0x11003000 0 0x400>;
> +		interrupts = <GIC_SPI 92 IRQ_TYPE_LEVEL_LOW>;
> +		clocks = <&clk26m>;
> +		status = "disabled";
> +	};
> +
> +	uart2: serial@11004000 {
> +		compatible = "mediatek,mt6797-uart",
> +			     "mediatek,mt6577-uart";
> +		reg = <0 0x11004000 0 0x400>;
> +		interrupts = <GIC_SPI 93 IRQ_TYPE_LEVEL_LOW>;
> +		clocks = <&clk26m>;
> +		status = "disabled";
> +	};
> +
> +	uart3: serial@11005000 {
> +		compatible = "mediatek,mt6797-uart",
> +			     "mediatek,mt6577-uart";
> +		reg = <0 0x11005000 0 0x400>;
> +		interrupts = <GIC_SPI 94 IRQ_TYPE_LEVEL_LOW>;
> +		clocks = <&clk26m>;
> +		status = "disabled";
> +	};
> +
> +	gic: interrupt-controller@19000000 {
> +		compatible = "arm,gic-v3";
> +		#interrupt-cells = <3>;
> +		interrupt-parent = <&gic>;
> +		interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
> +		interrupt-controller;
> +		reg = <0 0x19000000 0 0x10000>,    /* GICD */
> +		      <0 0x19200000 0 0x200000>,   /* GICR */
> +		      <0 0x10240000 0 0x2000>;     /* GICC */

No GICH, no GICV, no ITS?

> +	};
> +};
> 

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...