phb4: Workaround bug in spec 053
Wait for DLP PGRESET to clear *after* lifting the PCIe core reset
@@ -3544,8 +3544,7 @@ static void phb4_init_hw(struct phb4 *p, bool first_init)
in_be64(p->regs + PHB_PCIE_SCR));
/* Init_5 - Wait for DLP PGRESET to clear */
- if (!phb4_wait_dlp_reset(p))
- goto failed;
+ /* This is broken in spec 053, moving that step to after Init_16 */
/* Init_6 - deassert CFG reset */
creset = in_be64(p->regs + PHB_PCIE_CRESET);
@@ -3582,6 +3581,10 @@ static void phb4_init_hw(struct phb4 *p, bool first_init)
creset |= PHB_PCIE_CRESET_PIPE_N;
out_be64(p->regs + PHB_PCIE_CRESET, creset);
+ /* (Moved from Init_5) */
+ if (!phb4_wait_dlp_reset(p))
+ goto failed;
+
/* Init_17 - PHB Control */
val = PHB_CTRLR_IRQ_PGSZ_64K;
if (p->rev == PHB4_REV_NIMBUS_DD10) {
