[PATCH] armv8/fsl-lsch3: Suppress spurious warning on Layerscape CPUs

[stcarlso@linux.microsoft.com]

From: Stephen Carlson <stcarlso@linux.microsoft.com>

NXP/Freescale Layerscape CPUs support high-speed serial interfaces (SERDES)
that can be configured for the application. Interfaces not used by the
application can be set to protocol 0 to turn them off and save power, but
U-Boot would emit a warning that 0 was invalid for a SERDES protocol on
boot. Replace the warning text with a notice that the SERDES is disabled.

Signed-off-by: Stephen Carlson <stcarlso@linux.microsoft.com>
Cc: Priyanka Jain <priyanka.jain@nxp.com>
---
 arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c
index fad7a93566..181bd9c1b4 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c
@@ -147,10 +147,14 @@ void serdes_init(u32 sd, u32 sd_addr, u32 rcwsr, u32 sd_prctl_mask,
 	cfg >>= sd_prctl_shift;
 
 	cfg = serdes_get_number(sd, cfg);
-	printf("Using SERDES%d Protocol: %d (0x%x)\n", sd + 1, cfg, cfg);
+	if (cfg == 0) {
+		printf("SERDES%d is disabled\n", sd + 1);
+	} else {
+		printf("Using SERDES%d Protocol: %d (0x%x)\n", sd + 1, cfg, cfg);
 
-	if (!is_serdes_prtcl_valid(sd, cfg))
-		printf("SERDES%d[PRTCL] = 0x%x is not valid\n", sd + 1, cfg);
+		if (!is_serdes_prtcl_valid(sd, cfg))
+			printf("SERDES%d[PRTCL] = 0x%x is not valid\n", sd + 1, cfg);
+	}
 
 	for (lane = 0; lane < SRDS_MAX_LANES; lane++) {
 		enum srds_prtcl lane_prtcl = serdes_get_prtcl(sd, cfg, lane);
-- 
2.17.1