[PATCH 3/8] hw/riscv: Support the official CLINT DT bindings

[Bin Meng <bmeng.cn@gmail.com>]

From: Bin Meng <bin.meng@windriver.com>

Linux kernel commit a2770b57d083 ("dt-bindings: timer: Add CLINT bindings")
adds the official DT bindings for CLINT, which uses "sifive,clint0"
as the compatible string. "riscv,clint0" is now legacy and has to
be kept for backward compatibility of legacy systems.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
---

 hw/riscv/sifive_u.c | 4 +++-
 hw/riscv/spike.c    | 4 +++-
 hw/riscv/virt.c     | 4 +++-
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c
index f06b3b2e64..7f696ebc12 100644
--- a/hw/riscv/sifive_u.c
+++ b/hw/riscv/sifive_u.c
@@ -97,6 +97,7 @@ static void create_fdt(SiFiveUState *s, const MemMapEntry *memmap,
     uint32_t *cells;
     char *nodename;
     const char *ethclk_names[2] = { "pclk", "hclk" };
+    const char *clint_compat[2] = { "sifive,clint0", "riscv,clint0" };
     uint32_t plic_phandle, prci_phandle, gpio_phandle, phandle = 1;
     uint32_t hfclk_phandle, rtcclk_phandle, phy_phandle;
 
@@ -210,7 +211,8 @@ static void create_fdt(SiFiveUState *s, const MemMapEntry *memmap,
     nodename = g_strdup_printf("/soc/clint@%lx",
         (long)memmap[SIFIVE_U_DEV_CLINT].base);
     qemu_fdt_add_subnode(fdt, nodename);
-    qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv,clint0");
+    qemu_fdt_setprop_string_array(fdt, nodename, "compatible",
+        (char **)&clint_compat, ARRAY_SIZE(clint_compat));
     qemu_fdt_setprop_cells(fdt, nodename, "reg",
         0x0, memmap[SIFIVE_U_DEV_CLINT].base,
         0x0, memmap[SIFIVE_U_DEV_CLINT].size);
diff --git a/hw/riscv/spike.c b/hw/riscv/spike.c
index ec7cb2f707..cc33061f23 100644
--- a/hw/riscv/spike.c
+++ b/hw/riscv/spike.c
@@ -60,6 +60,7 @@ static void create_fdt(SpikeState *s, const MemMapEntry *memmap,
     uint32_t cpu_phandle, intc_phandle, phandle = 1;
     char *name, *mem_name, *clint_name, *clust_name;
     char *core_name, *cpu_name, *intc_name;
+    const char *clint_compat[2] = { "sifive,clint0", "riscv,clint0" };
 
     fdt = s->fdt = create_device_tree(&s->fdt_size);
     if (!fdt) {
@@ -153,7 +154,8 @@ static void create_fdt(SpikeState *s, const MemMapEntry *memmap,
             (memmap[SPIKE_CLINT].size * socket);
         clint_name = g_strdup_printf("/soc/clint@%lx", clint_addr);
         qemu_fdt_add_subnode(fdt, clint_name);
-        qemu_fdt_setprop_string(fdt, clint_name, "compatible", "riscv,clint0");
+        qemu_fdt_setprop_string_array(fdt, clint_name, "compatible",
+            (char **)&clint_compat, ARRAY_SIZE(clint_compat));
         qemu_fdt_setprop_cells(fdt, clint_name, "reg",
             0x0, clint_addr, 0x0, memmap[SPIKE_CLINT].size);
         qemu_fdt_setprop(fdt, clint_name, "interrupts-extended",
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 5d0c1e5903..5b4fac015d 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -193,6 +193,7 @@ static void create_fdt(RISCVVirtState *s, const MemMapEntry *memmap,
     uint32_t plic_pcie_phandle = 1, plic_virtio_phandle = 1;
     char *mem_name, *cpu_name, *core_name, *intc_name;
     char *name, *clint_name, *plic_name, *clust_name;
+    const char *clint_compat[2] = { "sifive,clint0", "riscv,clint0" };
     hwaddr flashsize = virt_memmap[VIRT_FLASH].size / 2;
     hwaddr flashbase = virt_memmap[VIRT_FLASH].base;
 
@@ -300,7 +301,8 @@ static void create_fdt(RISCVVirtState *s, const MemMapEntry *memmap,
             (memmap[VIRT_CLINT].size * socket);
         clint_name = g_strdup_printf("/soc/clint@%lx", clint_addr);
         qemu_fdt_add_subnode(fdt, clint_name);
-        qemu_fdt_setprop_string(fdt, clint_name, "compatible", "riscv,clint0");
+        qemu_fdt_setprop_string_array(fdt, clint_name, "compatible",
+            (char **)&clint_compat, ARRAY_SIZE(clint_compat));
         qemu_fdt_setprop_cells(fdt, clint_name, "reg",
             0x0, clint_addr, 0x0, memmap[VIRT_CLINT].size);
         qemu_fdt_setprop(fdt, clint_name, "interrupts-extended",
-- 
2.25.1