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>

diff --git a/arch/arm/mach-rockchip/board.c b/arch/arm/mach-rockchip/board.c
index 380aa91..133d663 100644 (file)
--- 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",
+       ""
+);