cpu: Add get_vendor callback

The CPU udevice already has a few callbacks to retreive information
about the currently running CPUs. This patch adds a new get_vendor()
call that returns the vendor of the main CPUs.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

5 files changed, 29 insertions, 0 deletions

diff --git a/arch/x86/cpu/baytrail/cpu.c b/arch/x86/cpu/baytrail/cpu.c
index 2837709d6d..0bb08524f8 100644
--- a/arch/x86/cpu/baytrail/cpu.c
+++ b/arch/x86/cpu/baytrail/cpu.c
@@ -189,6 +189,7 @@ static const struct cpu_ops cpu_x86_baytrail_ops = {
 	.get_desc	= cpu_x86_get_desc,
 	.get_info	= baytrail_get_info,
 	.get_count	= baytrail_get_count,
+	.get_vendor	= cpu_x86_get_vendor,
 };
 
 static const struct udevice_id cpu_x86_baytrail_ids[] = {
diff --git a/arch/x86/cpu/broadwell/cpu.c b/arch/x86/cpu/broadwell/cpu.c
index 3ba21aacec..6977e86032 100644
--- a/arch/x86/cpu/broadwell/cpu.c
+++ b/arch/x86/cpu/broadwell/cpu.c
@@ -743,6 +743,7 @@ static const struct cpu_ops cpu_x86_broadwell_ops = {
 	.get_desc	= cpu_x86_get_desc,
 	.get_info	= broadwell_get_info,
 	.get_count	= broadwell_get_count,
+	.get_vendor	= cpu_x86_get_vendor,
 };
 
 static const struct udevice_id cpu_x86_broadwell_ids[] = {
diff --git a/arch/x86/cpu/cpu_x86.c b/arch/x86/cpu/cpu_x86.c
index 39004ee5f0..157f3de6d8 100644
--- a/arch/x86/cpu/cpu_x86.c
+++ b/arch/x86/cpu/cpu_x86.c
@@ -27,6 +27,18 @@ int cpu_x86_bind(struct udevice *dev)
 	return 0;
 }
 
+int cpu_x86_get_vendor(struct udevice *dev, char *buf, int size)
+{
+	const char *vendor = cpu_vendor_name(gd->arch.x86_vendor);
+
+	if (size < (strlen(vendor) + 1))
+		return -ENOSPC;
+
+	strcpy(buf, vendor);
+
+	return 0;
+}
+
 int cpu_x86_get_desc(struct udevice *dev, char *buf, int size)
 {
 	if (size < CPU_MAX_NAME_LEN)
@@ -65,6 +77,7 @@ static int cpu_x86_get_count(struct udevice *dev)
 static const struct cpu_ops cpu_x86_ops = {
 	.get_desc	= cpu_x86_get_desc,
 	.get_count	= cpu_x86_get_count,
+	.get_vendor	= cpu_x86_get_vendor,
 };
 
 static const struct udevice_id cpu_x86_ids[] = {
diff --git a/arch/x86/cpu/ivybridge/model_206ax.c b/arch/x86/cpu/ivybridge/model_206ax.c
index b0743674ff..09b534255c 100644
--- a/arch/x86/cpu/ivybridge/model_206ax.c
+++ b/arch/x86/cpu/ivybridge/model_206ax.c
@@ -477,6 +477,7 @@ static const struct cpu_ops cpu_x86_model_206ax_ops = {
 	.get_desc	= cpu_x86_get_desc,
 	.get_info	= model_206ax_get_info,
 	.get_count	= model_206ax_get_count,
+	.get_vendor	= cpu_x86_get_vendor,
 };
 
 static const struct udevice_id cpu_x86_model_206ax_ids[] = {
diff --git a/arch/x86/include/asm/cpu_x86.h b/arch/x86/include/asm/cpu_x86.h
index 19404805c5..74b82edceb 100644
--- a/arch/x86/include/asm/cpu_x86.h
+++ b/arch/x86/include/asm/cpu_x86.h
@@ -31,4 +31,17 @@ int cpu_x86_bind(struct udevice *dev);
  */
 int cpu_x86_get_desc(struct udevice *dev, char *buf, int size);
 
+/**
+ * cpu_x86_get_vendor() - Get a vendor string for an x86 CPU
+ *
+ * This uses cpu_vendor_name() and is suitable to use as the get_vendor()
+ * method for the CPU uclass.
+ *
+ * @dev:	Device to check (UCLASS_CPU)
+ * @buf:	Buffer to place string
+ * @size:	Size of string space
+ * @return:	0 if OK, -ENOSPC if buffer is too small, other -ve on error
+ */
+int cpu_x86_get_vendor(struct udevice *dev, char *buf, int size);
+
 #endif /* _ASM_CPU_X86_H */