[U-Boot] [PATCH v4 12/17] board_f: Use static print_cpuinfo if CONFIG_CPU is active

[Mario Six]

When the DM CPU drivers are active, printing information about a CPU
should be delegated to a matching driver.

Hence, add a static print_cpuinfo that implements this delegation when
DM CPU drivers are active.

Reviewed-by: Simon Glass <sjg at chromium.org>
Signed-off-by: Mario Six <mario.six at gdsys.cc>
---

Notes:
    v3 -> v4:
    * Print error if CPU description could not be retrieved
    * Improved error handling and debug reporting
    * Added documentation
    
    v2 -> v3:
    No changes
    
    v1 -> v2:
    New in v2

 common/board_f.c | 28 ++++++++++++++++++++++++++++
 include/init.h   |  7 +++++++
 2 files changed, 35 insertions(+)

diff --git a/common/board_f.c b/common/board_f.c
index afafec5e4d0..fcc89df8160 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -11,6 +11,7 @@
 
 #include <common.h>
 #include <console.h>
+#include <cpu.h>
 #include <dm.h>
 #include <environment.h>
 #include <fdtdec.h>
@@ -165,6 +166,33 @@ static int print_resetinfo(void)
 }
 #endif
 
+#if defined(CONFIG_DISPLAY_CPUINFO) && defined(CONFIG_CPU)
+static int print_cpuinfo(void)
+{
+	struct udevice *dev;
+	char desc[512];
+	int ret;
+
+	ret = uclass_first_device_err(UCLASS_CPU, &dev);
+	if (ret) {
+		debug("%s: Could not get CPU device (err = %d)\n",
+		      __func__, ret);
+		return ret;
+	}
+
+	ret = cpu_get_desc(dev, desc, sizeof(desc));
+	if (ret) {
+		debug("%s: Could not get CPU description (err = %d)\n",
+		      dev->name, ret);
+		return ret;
+	}
+
+	printf("%s", desc);
+
+	return 0;
+}
+#endif
+
 static int announce_dram_init(void)
 {
 	puts("DRAM:  ");
diff --git a/include/init.h b/include/init.h
index a58d7a6917f..a76d747b035 100644
--- a/include/init.h
+++ b/include/init.h
@@ -109,7 +109,14 @@ int arch_reserve_stacks(void);
  */
 int init_cache_f_r(void);
 
+#ifndef CONFIG_CPU
+/**
+ * print_cpuinfo() - Display information about the CPU
+ *
+ * Return: 0 if OK, -ve on error
+ */
 int print_cpuinfo(void);
+#endif
 int timer_init(void);
 int reserve_mmu(void);
 int misc_init_f(void);
-- 
2.11.0