diff options
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/arm-cci.c | 3 | ||||
| -rw-r--r-- | drivers/bus/mvebu-mbus.c | 13 |
2 files changed, 16 insertions, 0 deletions
diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c index 860da40b78ef..0ce5e2d65a06 100644 --- a/drivers/bus/arm-cci.c +++ b/drivers/bus/arm-cci.c @@ -1312,6 +1312,9 @@ static int cci_probe(void) if (!np) return -ENODEV; + if (!of_device_is_available(np)) + return -ENODEV; + cci_config = of_match_node(arm_cci_matches, np)->data; if (!cci_config) return -ENODEV; diff --git a/drivers/bus/mvebu-mbus.c b/drivers/bus/mvebu-mbus.c index eb7682dc123b..81bf297f1034 100644 --- a/drivers/bus/mvebu-mbus.c +++ b/drivers/bus/mvebu-mbus.c @@ -210,12 +210,25 @@ static void mvebu_mbus_disable_window(struct mvebu_mbus_state *mbus, } /* Checks whether the given window number is available */ + +/* On Armada XP, 375 and 38x the MBus window 13 has the remap + * capability, like windows 0 to 7. However, the mvebu-mbus driver + * isn't currently taking into account this special case, which means + * that when window 13 is actually used, the remap registers are left + * to 0, making the device using this MBus window unavailable. The + * quick fix for stable is to not use window 13. A follow up patch + * will correctly handle this window. +*/ static int mvebu_mbus_window_is_free(struct mvebu_mbus_state *mbus, const int win) { void __iomem *addr = mbus->mbuswins_base + mbus->soc->win_cfg_offset(win); u32 ctrl = readl(addr + WIN_CTRL_OFF); + + if (win == 13) + return false; + return !(ctrl & WIN_CTRL_ENABLE); } |