fsl: serdes: ensure accessing the initialized maps of serdes protocol
Up to now, the function is_serdes_configed() doesn't check if the map
of serdes protocol is initialized before accessing it. The function
is_serdes_configed() will get wrong result when it was called before
the serdes protocol maps initialized. As the first element of the map
isn't used for any device, so use it as the flag to indicate if the
map has been initialized.
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/arch/powerpc/cpu/mpc85xx/p1021_serdes.c b/arch/powerpc/cpu/mpc85xx/p1021_serdes.c
index 99a77bd..77b9439 100644
--- a/arch/powerpc/cpu/mpc85xx/p1021_serdes.c
+++ b/arch/powerpc/cpu/mpc85xx/p1021_serdes.c
@@ -41,6 +41,9 @@
int is_serdes_configured(enum srds_prtcl prtcl)
{
+ if (!(serdes1_prtcl_map & (1 << NONE)))
+ fsl_serdes_init();
+
return (1 << prtcl) & serdes1_prtcl_map;
}
@@ -55,6 +58,9 @@
int lane;
u32 mask, val;
+ if (serdes1_prtcl_map & (1 << NONE))
+ return;
+
debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -67,6 +73,9 @@
serdes1_prtcl_map |= (1 << lane_prtcl);
}
+ /* Set the first bit to indicate serdes has been initialized */
+ serdes1_prtcl_map |= (1 << NONE);
+
/* Init SERDES Receiver electrical idle detection control for PCIe */
/* Lane 0 is always PCIe 1 */