[PATCH v2 6/7] riscv: Update Kendryte device tree for new CLINT driver

[Bin Meng]

On Wed, Jul 29, 2020 at 5:57 PM Sean Anderson <seanga2 at gmail.com> wrote:
>
> AFAIK because the K210 clock driver does not come up until after
> relocation, the clint will always use the clock-frequency parameter.
> Ideally, it should update itself after relocation to take into account the
> actual CPU frequency.
>
> Signed-off-by: Sean Anderson <seanga2 at gmail.com>
> ---
>
> Changes in v2:
> - New
>
>  arch/riscv/dts/k210.dtsi | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/arch/riscv/dts/k210.dtsi b/arch/riscv/dts/k210.dtsi
> index 2546c7d4e0..2698a33a5c 100644
> --- a/arch/riscv/dts/k210.dtsi
> +++ b/arch/riscv/dts/k210.dtsi
> @@ -17,6 +17,8 @@
>         compatible = "kendryte,k210";
>
>         aliases {
> +               cpu0 = &cpu0;
> +               cpu1 = &cpu1;
>                 dma0 = &dmac0;
>                 gpio0 = &gpio0;
>                 gpio1 = &gpio1_0;
> @@ -126,14 +128,15 @@
>                         read-only;
>                 };
>
> -               clint0: interrupt-controller at 2000000 {
> +               clint0: clint at 2000000 {
>                         #interrupt-cells = <1>;
>                         compatible = "kendryte,k210-clint", "riscv,clint0";
>                         reg = <0x2000000 0xC000>;
> -                       interrupt-controller;

Why is this property dropped?

>                         interrupts-extended = <&cpu0_intc 3>, <&cpu0_intc 7>,
>                                               <&cpu1_intc 3>, <&cpu1_intc 7>;
> -                       clocks = <&sysclk K210_CLK_CPU>;
> +                       clocks = <&sysclk K210_CLK_CLINT>;
> +                       /* sysclk is only available post-relocation */
> +                       clock-frequency = <7800000>;
>                 };
>
>                 plic0: interrupt-controller at C000000 {
> --

Regards,
Bin