From 74e53e0e9b7cf78a7e896cf6626f0ca607da5872 Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Thu, 21 Jan 2016 19:45:07 -0700
Subject: rockchip: Add a simple 'clock' command

Add a command that displays the PLLs and their current rate.

Signed-off-by: Simon Glass <sjg@chromium.org>
---
 arch/arm/mach-rockchip/board.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm/mach-rockchip/board.c b/arch/arm/mach-rockchip/board.c
index 380aa91..133d663 100644
--- a/arch/arm/mach-rockchip/board.c
+++ b/arch/arm/mach-rockchip/board.c
@@ -5,6 +5,7 @@
  */
 
 #include <common.h>
+#include <clk.h>
 #include <dm.h>
 #include <ram.h>
 #include <asm/io.h>
@@ -49,3 +50,26 @@ void enable_caches(void)
 void lowlevel_init(void)
 {
 }
+
+static int do_clock(cmd_tbl_t *cmdtp, int flag, int argc,
+		       char * const argv[])
+{
+	struct udevice *dev;
+
+	for (uclass_first_device(UCLASS_CLK, &dev);
+	     dev;
+	     uclass_next_device(&dev)) {
+		ulong rate;
+
+		rate = clk_get_rate(dev);
+		printf("%s: %lu\n", dev->name, rate);
+	}
+
+	return 0;
+}
+
+U_BOOT_CMD(
+	clock, 2, 1, do_clock,
+	"display information about clocks",
+	""
+);
-- 
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