Re: [Qemu-devel] [PATCH 13/21] ppc/pnv: populate device tree for serial devices

[David Gibson]

On Wed, Apr 05, 2017 at 02:41:38PM +0200, Cédric Le Goater wrote:
> Signed-off-by: Cédric Le Goater <address@hidden>

Reviewed-by: David Gibson <address@hidden>

> ---
>  hw/ppc/pnv.c | 33 +++++++++++++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
> 
> diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
> index 2f9c41e350d4..00e594a0cbe3 100644
> --- a/hw/ppc/pnv.c
> +++ b/hw/ppc/pnv.c
> @@ -301,6 +301,37 @@ static void powernv_populate_rtc(ISADevice *d, void 
> *fdt, int lpc_off)
>      _FDT((fdt_setprop_string(fdt, node, "compatible", "pnpPNP,b00")));
>  }
>  
> +static void powernv_populate_serial(ISADevice *d, void *fdt, int lpc_off)
> +{
> +    const char compatible[] = "ns16550\0pnpPNP,501";
> +    uint32_t io_base = d->ioport_id;
> +    uint32_t io_regs[] = {
> +        cpu_to_be32(1),
> +        cpu_to_be32(io_base),
> +        cpu_to_be32(8)
> +    };
> +    char *name;
> +    int node;
> +
> +    name = g_strdup_printf("address@hidden", qdev_fw_name(DEVICE(d)), 
> io_base);
> +    node = fdt_add_subnode(fdt, lpc_off, name);
> +    _FDT(node);
> +    g_free(name);
> +
> +    _FDT((fdt_setprop(fdt, node, "reg", io_regs, sizeof(io_regs))));
> +    _FDT((fdt_setprop(fdt, node, "compatible", compatible,
> +                      sizeof(compatible))));
> +
> +    _FDT((fdt_setprop_cell(fdt, node, "clock-frequency", 1843200)));
> +    _FDT((fdt_setprop_cell(fdt, node, "current-speed", 115200)));
> +    _FDT((fdt_setprop_cell(fdt, node, "interrupts", d->isairq[0])));
> +    _FDT((fdt_setprop_cell(fdt, node, "interrupt-parent",
> +                           fdt_get_phandle(fdt, lpc_off))));
> +
> +    /* This is needed by Linux */
> +    _FDT((fdt_setprop_string(fdt, node, "device_type", "serial")));
> +}
> +
>  typedef struct ForeachPopulateArgs {
>      void *fdt;
>      int offset;
> @@ -313,6 +344,8 @@ static int powernv_populate_isa_device(DeviceState *dev, 
> void *opaque)
>  
>      if (object_dynamic_cast(OBJECT(dev), TYPE_MC146818_RTC)) {
>          powernv_populate_rtc(d, args->fdt, args->offset);
> +    } else if (object_dynamic_cast(OBJECT(dev), TYPE_ISA_SERIAL)) {
> +        powernv_populate_serial(d, args->fdt, args->offset);
>      } else {
>          error_report("unknown isa device address@hidden", qdev_fw_name(dev),
>                       d->ioport_id);

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson

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