mxc_get_clock's return type is unsigned int. 'return -1' is same with
'return 0xffffffff', so 0 should be used as the return value when
unsupported mxc_clock type is passed to mxc_get_clock.

Also include an err message when unsupported mxc_clock type is passed
to mxc_get_clock.

Signed-off-by: Peng Fan <peng....@freescale.com>
---
 arch/arm/cpu/armv7/mx6/clock.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index 80b11aa..99dba07 100644
--- a/arch/arm/cpu/armv7/mx6/clock.c
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -738,10 +738,11 @@ unsigned int mxc_get_clock(enum mxc_clock clk)
        case MXC_SATA_CLK:
                return get_ahb_clk();
        default:
+               printf("Unsupported MXC CLK: %d\n", clk);
                break;
        }
 
-       return -1;
+       return 0;
 }
 
 /*
-- 
1.8.4


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