[RFC PATCH v3 11/24] ARM: fdt: Export and introduce new fdt functions

From: vijay.kilari@gmail.com
To: xen-devel@lists.xen.org
Cc: kevin.tian@intel.com, sstabellini@kernel.org,
	wei.liu2@citrix.com, George.Dunlap@eu.citrix.com,
	andrew.cooper3@citrix.com, dario.faggioli@citrix.com,
	ian.jackson@eu.citrix.com, tim@xen.org, julien.grall@arm.com,
	jbeulich@suse.com, Vijaya Kumar K <Vijaya.Kumar@cavium.com>
Subject: [RFC PATCH v3 11/24] ARM: fdt: Export and introduce new fdt functions
Date: Tue, 18 Jul 2017 17:11:33 +0530	[thread overview]
Message-ID: <1500378106-2620-12-git-send-email-vijay.kilari@gmail.com> (raw)
In-Reply-To: <1500378106-2620-1-git-send-email-vijay.kilari@gmail.com>

From: Vijaya Kumar K <Vijaya.Kumar@cavium.com>

Introduce new api device_tree_type_matches() to check for
device type. Also export device_tree_get_u32() and
device_tree_node_compatible()

These functions are later used for parsing NUMA information.

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@cavium.com>
---
v3: Export device_tree_node_compatible() instead of
    device_tree_node_matches()
---
 xen/arch/arm/bootfdt.c      | 20 ++++++++++++++++----
 xen/include/asm-arm/setup.h |  5 +++++
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/xen/arch/arm/bootfdt.c b/xen/arch/arm/bootfdt.c
index ea188a0..6e8251b 100644
--- a/xen/arch/arm/bootfdt.c
+++ b/xen/arch/arm/bootfdt.c
@@ -31,8 +31,8 @@ static bool_t __init device_tree_node_matches(const void *fdt, int node,
         && (name[match_len] == '@' || name[match_len] == '\0');
 }
 
-static bool_t __init device_tree_node_compatible(const void *fdt, int node,
-                                                 const char *match)
+bool_t __init device_tree_node_compatible(const void *fdt, int node,
+                                          const char *match)
 {
     int len, l;
     int mlen;
@@ -62,8 +62,20 @@ static void __init device_tree_get_reg(const __be32 **cell, u32 address_cells,
     *size = dt_next_cell(size_cells, cell);
 }
 
-static u32 __init device_tree_get_u32(const void *fdt, int node,
-                                      const char *prop_name, u32 dflt)
+bool_t __init device_tree_type_matches(const void *fdt, int node,
+                                       const char *match)
+{
+    const void *prop;
+
+    prop = fdt_getprop(fdt, node, "device_type", NULL);
+    if ( prop == NULL )
+        return 0;
+
+    return strcmp(prop, match) == 0 ? 1 : 0;
+}
+
+u32 __init device_tree_get_u32(const void *fdt, int node,
+                               const char *prop_name, u32 dflt)
 {
     const struct fdt_property *prop;
 
diff --git a/xen/include/asm-arm/setup.h b/xen/include/asm-arm/setup.h
index 7ff2c34..fb78478 100644
--- a/xen/include/asm-arm/setup.h
+++ b/xen/include/asm-arm/setup.h
@@ -83,6 +83,11 @@ struct bootmodule *add_boot_module(bootmodule_kind kind,
 struct bootmodule *boot_module_find_by_kind(bootmodule_kind kind);
 const char * __init boot_module_kind_as_string(bootmodule_kind kind);
 
+u32 device_tree_get_u32(const void *fdt, int node, const char *prop_name,
+                        u32 dflt);
+bool_t device_tree_type_matches(const void *fdt, int node, const char *match);
+bool_t device_tree_node_compatible(const void *fdt, int node,
+                                   const char *match);
 #endif
 /*
  * Local variables:
-- 
2.7.4


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