[PATCH v7 06/20] xen/riscv: implement make_timer_node()

Generally, in DT for RISC-V there is a document which describes a timer
node (riscv,timer.yaml or sifive,clint.yaml), but the Linux timer driver
is declared with TIMER_OF_DECLARE(riscv_timer, "riscv", ...).
It matches the CPU node (compatible "riscv"), not the timer node itself.
It then calls of_find_compatible_node(NULL, NULL, "riscv,timer") only to
read the optional riscv,timer-cannot-wake-cpu property.

Since Xen does not care about that property for now, make_timer_node() is
implemented to return 0, as no timer node needs to be created for RISC-V
guests.

Signed-off-by: Oleksii Kurochko <[email protected]>
Acked-by: Jan Beulich <[email protected]>
---
Changes in v3-7:
 - Nothing changed. Only rebase.
---
Changes in v2:
 - Acked-by: Jan Beulich <[email protected]>
 - Update the commit message.
---
---
 xen/arch/riscv/domain-build.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/xen/arch/riscv/domain-build.c b/xen/arch/riscv/domain-build.c
index 1af4c48fb30c..d7613721db95 100644
--- a/xen/arch/riscv/domain-build.c
+++ b/xen/arch/riscv/domain-build.c
@@ -3,6 +3,7 @@
 #include <xen/fdt-domain-build.h>
 #include <xen/fdt-kernel.h>
 #include <xen/init.h>
+#include <xen/fdt-kernel.h>
 #include <xen/libfdt/libfdt.h>
 #include <xen/sched.h>
 
@@ -154,3 +155,10 @@ int __init make_cpus_node(const struct domain *d, struct kernel_info *kinfo)
 
     return fdt_end_node(fdt);
 }
+
+int __init make_timer_node(const struct kernel_info *kinfo)
+{
+    /* There is no need for timer node for RISC-V. */
+
+    return 0;
+}
-- 
2.55.0