[U-Boot] [PATCH v2 02/17] cmd: Do not show frequency for clocks which .get_rate() return error

[Lukasz Majewski]

It may happen that some UCLASS_CLK clocks drivers work as a "managers",
to call other, proper clocks. This situation is present in the iMX{6|8}
clocks when supporting CONFIG_CLK (and CCF).

To avoid bogus output of "clk dump" we omit clocks which return error
value - allowing reusing default implementation of this command.

Signed-off-by: Lukasz Majewski <lukma at denx.de>
---

Changes in v2: None

 cmd/clk.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/cmd/clk.c b/cmd/clk.c
index fd4231589c..2ea82176aa 100644
--- a/cmd/clk.c
+++ b/cmd/clk.c
@@ -16,6 +16,7 @@ int __weak soc_clk_dump(void)
 	struct udevice *dev;
 	struct uclass *uc;
 	struct clk clk;
+	ulong rate;
 	int ret;
 
 	/* Device addresses start at 1 */
@@ -37,7 +38,9 @@ int __weak soc_clk_dump(void)
 			continue;
 		}
 
-		printf("%-30.30s : %lu Hz\n", dev->name, clk_get_rate(&clk));
+		rate = clk_get_rate(&clk);
+		if (!IS_ERR_VALUE(rate))
+			printf("%-30.30s : %lu Hz\n", dev->name, rate);
 
 		clk_free(&clk);
 	}
-- 
2.11.0