armv8: fsl-layerscape: reorder rgmii dpmacs' enablement

some dpmacs in armv8a based freescale layerscape SOCs can be
configured via both serdes(sgmii, xfi, xlaui etc) bits and via
EC*_PMUX(rgmii) bits in RCW.
e.g. dpmac 17 and 18 in LX2160A can be configured as SGMII from
serdes bits and as RGMII via EC1_PMUX/EC2_PMUX bits
Now if a dpmac is enabled by serdes bits then it takes precedence
over EC*_PMUX bits. i.e. in LX2160A if we select serdes protocol
that configures dpmac17 as SGMII and set the EC1_PMUX as RGMII,
then the dpmac is SGMII and not RGMII.

Therefore, move the fsl_rgmii_init after fsl_serdes_init. in
fsl_rgmii_init function of SOC, we will check if the dpmac is enabled
or not? if it is (fsl_serdes_init has already enabled the dpmac), then
don't enable it.

Signed-off-by: Pankaj Bansal <pankaj.bansal@nxp.com>
Reviewed-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
index be21685..978d46b 100644 (file)
--- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
@@ -1099,15 +1099,29 @@ int arch_early_init_r(void)
                        printf("Did not wake secondary cores\n");
        }
 
-#ifdef CONFIG_SYS_FSL_HAS_RGMII
-       fsl_rgmii_init();
-#endif
-
        config_core_prefetch();
 
 #ifdef CONFIG_SYS_HAS_SERDES
        fsl_serdes_init();
 #endif
+#ifdef CONFIG_SYS_FSL_HAS_RGMII
+       /* some dpmacs in armv8a based freescale layerscape SOCs can be
+        * configured via both serdes(sgmii, xfi, xlaui etc) bits and via
+        * EC*_PMUX(rgmii) bits in RCW.
+        * e.g. dpmac 17 and 18 in LX2160A can be configured as SGMII from
+        * serdes bits and as RGMII via EC1_PMUX/EC2_PMUX bits
+        * Now if a dpmac is enabled by serdes bits then it takes precedence
+        * over EC*_PMUX bits. i.e. in LX2160A if we select serdes protocol
+        * that configures dpmac17 as SGMII and set the EC1_PMUX as RGMII,
+        * then the dpmac is SGMII and not RGMII.
+        *
+        * Therefore, move the fsl_rgmii_init after fsl_serdes_init. in
+        * fsl_rgmii_init function of SOC, we will check if the dpmac is enabled
+        * or not? if it is (fsl_serdes_init has already enabled the dpmac),
+        * then don't enable it.
+        */
+       fsl_rgmii_init();
+#endif
 #ifdef CONFIG_FMAN_ENET
        fman_enet_init();
 #endif