Re: [PATCH v3 13/20] hw/mips/fuloong2e: Set CPU frequency to 533 MHz

[Jiaxun Yang]

在 2020/10/11 上午4:43, Philippe Mathieu-Daudé 写道:
> The CPU frequency is normally provided by the firmware in the
> "cpuclock" environment variable. The 2E board can handles up
> to 660MHz, but be conservative and take the same value used
> by the Linux kernel: 533 MHz.
>
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>

Thanks

- Jiaxun
> ---
>   hw/mips/fuloong2e.c | 8 +++++++-
>   1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/hw/mips/fuloong2e.c b/hw/mips/fuloong2e.c
> index b000ed1d7f7..b25c3df19d0 100644
> --- a/hw/mips/fuloong2e.c
> +++ b/hw/mips/fuloong2e.c
> @@ -28,6 +28,7 @@
>   #include "hw/isa/superio.h"
>   #include "net/net.h"
>   #include "hw/boards.h"
> +#include "hw/qdev-clock.h"
>   #include "hw/i2c/smbus_eeprom.h"
>   #include "hw/block/flash.h"
>   #include "hw/mips/mips.h"
> @@ -300,10 +301,15 @@ static void mips_fuloong2e_init(MachineState *machine)
>       I2CBus *smbus;
>       MIPSCPU *cpu;
>       CPUMIPSState *env;
> +    Clock *cpuclk;
>       DeviceState *dev;
>   
>       /* init CPUs */
> -    cpu = MIPS_CPU(cpu_create(machine->cpu_type));
> +    cpu = MIPS_CPU(object_new(machine->cpu_type));
> +    cpuclk = clock_new(OBJECT(machine), "cpu-refclk");
> +    clock_set_hz(cpuclk, 533080000); /* ~533 MHz */
> +    qdev_connect_clock_in(DEVICE(cpu), "clk-in", cpuclk);
> +    qdev_realize(DEVICE(cpu), NULL, &error_abort);
>       env = &cpu->env;
>   
>       qemu_register_reset(main_cpu_reset, cpu);