Commit 016f7758 authored by Alexander Graf's avatar Alexander Graf
Browse files

PPC: E500: Hook up power off GPIO to GPIO controller 



Now that we have a working GPIO controller on the virt machine, we can use
one pin to notify QEMU that the guests wants to power off the system.

Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent b88e77f4

hw/ppc/e500.c

+24 −0
Original line number Diff line number Diff line
@@ -129,6 +129,8 @@ static void create_dt_mpc8xxx_gpio(void *fdt, const char *soc, const char *mpic) 
    hwaddr mmio0 = MPC8XXX_GPIO_OFFSET;

    int irq0 = MPC8XXX_GPIO_IRQ;

    gchar *node = g_strdup_printf("%s/gpio@%"PRIx64, soc, mmio0);

    gchar *poweroff = g_strdup_printf("%s/power-off", soc);

    int gpio_ph;



    qemu_fdt_add_subnode(fdt, node);

    qemu_fdt_setprop_string(fdt, node, "compatible", "fsl,qoriq-gpio");
@@ -137,8 +139,17 @@ static void create_dt_mpc8xxx_gpio(void *fdt, const char *soc, const char *mpic) 
    qemu_fdt_setprop_phandle(fdt, node, "interrupt-parent", mpic);

    qemu_fdt_setprop_cells(fdt, node, "#gpio-cells", 2);

    qemu_fdt_setprop(fdt, node, "gpio-controller", NULL, 0);

    gpio_ph = qemu_fdt_alloc_phandle(fdt);

    qemu_fdt_setprop_cell(fdt, node, "phandle", gpio_ph);

    qemu_fdt_setprop_cell(fdt, node, "linux,phandle", gpio_ph);



    /* Power Off Pin */

    qemu_fdt_add_subnode(fdt, poweroff);

    qemu_fdt_setprop_string(fdt, poweroff, "compatible", "gpio-poweroff");

    qemu_fdt_setprop_cells(fdt, poweroff, "gpios", gpio_ph, 0, 0);



    g_free(node);

    g_free(poweroff);

}



static int ppce500_load_device_tree(MachineState *machine,
@@ -641,6 +652,13 @@ static qemu_irq *ppce500_init_mpic(PPCE500Params *params, MemoryRegion *ccsr, 
    return mpic;

}



static void ppce500_power_off(void *opaque, int line, int on)

{

    if (on) {

        qemu_system_shutdown_request();

    }

}



void ppce500_init(MachineState *machine, PPCE500Params *params)

{

    MemoryRegion *address_space_mem = get_system_memory();
@@ -793,12 +811,18 @@ void ppce500_init(MachineState *machine, PPCE500Params *params) 
    }



    if (params->has_mpc8xxx_gpio) {

        qemu_irq poweroff_irq;



        dev = qdev_create(NULL, "mpc8xxx_gpio");

        s = SYS_BUS_DEVICE(dev);

        qdev_init_nofail(dev);

        sysbus_connect_irq(s, 0, mpic[MPC8XXX_GPIO_IRQ]);

        memory_region_add_subregion(ccsr_addr_space, MPC8XXX_GPIO_OFFSET,

                                    sysbus_mmio_get_region(s, 0));



        /* Power Off GPIO at Pin 0 */

        poweroff_irq = qemu_allocate_irq(ppce500_power_off, NULL, 0);

        qdev_connect_gpio_out(dev, 0, poweroff_irq);

    }



    /* Load kernel. */