microblaze: Add support for early console on mdm

Support mdm early console:
 - extend time for retries
 - add mdm compatible property

Signed-off-by: Michal Simek <monstr@monstr.eu>

2 files changed, 3 insertions, 2 deletions

diff --git a/arch/microblaze/kernel/early_printk.c b/arch/microblaze/kernel/early_printk.c
index e21390da0a4d..d26d92d47754 100644
--- a/arch/microblaze/kernel/early_printk.c
+++ b/arch/microblaze/kernel/early_printk.c
@@ -35,7 +35,7 @@ static void early_printk_uartlite_putc(char c)
          * we'll never timeout on a working UART.
          */
 
-        unsigned retries = 10000;
+        unsigned retries = 1000000;
         /* read status bit - 0x8 offset */
         while (--retries && (in_be32(base_addr + 8) & (1 << 3)))
                 ;
diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c
index 18d9371d9b26..977484add216 100644
--- a/arch/microblaze/kernel/prom.c
+++ b/arch/microblaze/kernel/prom.c
@@ -88,7 +88,8 @@ int __init early_init_dt_scan_chosen_serial(unsigned long node,
                 }
                 if ((strncmp(p, "xlnx,xps-uartlite", 17) == 0) ||
                                 (strncmp(p, "xlnx,opb-uartlite", 17) == 0) ||
-                                (strncmp(p, "xlnx,axi-uartlite", 17) == 0)) {
+                                (strncmp(p, "xlnx,axi-uartlite", 17) == 0) ||
+                                (strncmp(p, "xlnx,mdm", 8) == 0)) {
                         unsigned int *addrp;
 
                         *(u32 *)data = UARTLITE;