在 2017-08-23 22:35，Maxime Ripard 写道：
On Wed, Aug 23, 2017 at 07:56:29PM +0800, icenowy@xxxxxxx wrote:
> > + reg = <0x01c0f000 0x1000>;
> > + clocks = <&ccu CLK_BUS_MMC0>, <&ccu CLK_MMC0>;
> > + clock-names = "ahb", "mmc";
> > + resets = <&ccu RST_BUS_MMC0>;
> > + reset-names = "ahb";
> > + pinctrl-0 = <&mmc0_pins>;
> > + pinctrl-names = "default";
> > + interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
> > + max-frequency = <150000000>;
>
> have you tested that frequency?
I think the frequency should be kept here, although my cards cannot
reach this frequency.
The numbers are same as the corresponding controllers in A64.
Maybe I should add a comment saying it's educated guess?
I'd rather have it tested by someone, and then add the proper
frequencies. It took quite a while to figure out how these modes were
supposed to be working on the A64, so it's not obvious that they're
just going to work.
Should I add my results here?
MMC0: 25MHz
MMC1: 50MHz
MMC2: 52MHz
MMC3: not wired :-(
I think it's conservative enough and works well ;-)
> > + gic: interrupt-controller@1c81000 {
> > + compatible = "arm,gic-400";
> > + reg = <0x01c81000 0x1000>,
> > + <0x01c82000 0x1000>,
> > + <0x01c84000 0x2000>,
> > + <0x01c86000 0x2000>;
> > + interrupt-controller;
> > + #interrupt-cells = <3>;
> > + interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) |
> > IRQ_TYPE_LEVEL_HIGH)>;
> > + };
> > + };
> > +
> > + timer {
> > + compatible = "arm,armv7-timer";
> > + interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) |
> > IRQ_TYPE_LEVEL_LOW)>,
> > + <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> > + <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> > + <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
>
> Those masks are wrong.
I compared it with other sun8i SoCs' device tree.
Where's wrong?
It's supposed to be a mask of the CPUs in your system. Since you just
have one of them, it shouldn't be 4.
R40 has 4 cores...
Or I didn't understand this?
Maxime
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