[PULL 1/5] riscv/virt: Add syscon reboot and poweroff DT nodes

[Palmer Dabbelt]

From: Anup Patel <address@hidden>

The SiFive test device found on virt machine can be used by
generic syscon reboot and poweroff drivers available in Linux
kernel.

This patch updates FDT generation in virt machine so that
Linux kernel can probe and use generic syscon drivers.

Signed-off-by: Anup Patel <address@hidden>
Reviewed-by: Palmer Dabbelt <address@hidden>
Signed-off-by: Palmer Dabbelt <address@hidden>
---
 hw/riscv/virt.c | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index c44b865959..6d682f8a78 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -182,11 +182,10 @@ static void create_fdt(RISCVVirtState *s, const struct 
MemmapEntry *memmap,
     uint64_t mem_size, const char *cmdline)
 {
     void *fdt;
-    int cpu;
+    int cpu, i;
     uint32_t *cells;
     char *nodename;
-    uint32_t plic_phandle, phandle = 1;
-    int i;
+    uint32_t plic_phandle, test_phandle, phandle = 1;
     hwaddr flashsize = virt_memmap[VIRT_FLASH].size / 2;
     hwaddr flashbase = virt_memmap[VIRT_FLASH].base;
 
@@ -356,16 +355,35 @@ static void create_fdt(RISCVVirtState *s, const struct 
MemmapEntry *memmap,
     create_pcie_irq_map(fdt, nodename, plic_phandle);
     g_free(nodename);
 
+    test_phandle = phandle++;
     nodename = g_strdup_printf("/test@%lx",
         (long)memmap[VIRT_TEST].base);
     qemu_fdt_add_subnode(fdt, nodename);
     {
-        const char compat[] = "sifive,test1\0sifive,test0";
+        const char compat[] = "sifive,test1\0sifive,test0\0syscon";
         qemu_fdt_setprop(fdt, nodename, "compatible", compat, sizeof(compat));
     }
     qemu_fdt_setprop_cells(fdt, nodename, "reg",
         0x0, memmap[VIRT_TEST].base,
         0x0, memmap[VIRT_TEST].size);
+    qemu_fdt_setprop_cell(fdt, nodename, "phandle", test_phandle);
+    test_phandle = qemu_fdt_get_phandle(fdt, nodename);
+    g_free(nodename);
+
+    nodename = g_strdup_printf("/reboot");
+    qemu_fdt_add_subnode(fdt, nodename);
+    qemu_fdt_setprop_string(fdt, nodename, "compatible", "syscon-reboot");
+    qemu_fdt_setprop_cell(fdt, nodename, "regmap", test_phandle);
+    qemu_fdt_setprop_cell(fdt, nodename, "offset", 0x0);
+    qemu_fdt_setprop_cell(fdt, nodename, "value", FINISHER_RESET);
+    g_free(nodename);
+
+    nodename = g_strdup_printf("/poweroff");
+    qemu_fdt_add_subnode(fdt, nodename);
+    qemu_fdt_setprop_string(fdt, nodename, "compatible", "syscon-poweroff");
+    qemu_fdt_setprop_cell(fdt, nodename, "regmap", test_phandle);
+    qemu_fdt_setprop_cell(fdt, nodename, "offset", 0x0);
+    qemu_fdt_setprop_cell(fdt, nodename, "value", FINISHER_PASS);
     g_free(nodename);
 
     nodename = g_strdup_printf("/uart@%lx",
-- 
2.25.0.225.g125e21ebc7-goog