imx: add necessary lpuart console_flush callback for debug

Current lpuart driver does NOT implement .console_flush callback,
if debug console is enabled, the console_flush() will call the
undefined .console_flush callback(NULL) for lpuart and leak to
panic, this patch adds .console_flush callback to make lpuart work
for debug mode.

Signed-off-by: Anson Huang <[email protected]>

diff --git a/plat/imx/common/lpuart_console.S b/plat/imx/common/lpuart_console.S
index 668fd624964ab0e1bccd0091b97f1bf026909bda..01628680f770832e9a42f229d94e48b73e5de1ef 100644 (file)
--- a/plat/imx/common/lpuart_console.S
+++ b/plat/imx/common/lpuart_console.S
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -15,6 +15,7 @@
        .globl  console_lpuart_init
        .globl  console_lpuart_putc
        .globl  console_lpuart_getc
+       .globl  console_lpuart_flush
 
 func console_lpuart_register
        mov     x7, x30
@@ -27,7 +28,7 @@ func console_lpuart_register
 
        mov     x0, x6
        mov     x30, x7
-       finish_console_register lpuart putc=1, getc=1
+       finish_console_register lpuart putc=1, getc=1, flush=1
 
 register_fail:
        ret     x7
@@ -70,3 +71,8 @@ getc_error:
        mov     w0, #-1
        ret
 endfunc console_lpuart_getc
+
+func console_lpuart_flush
+       mov     x0, #0
+       ret
+endfunc console_lpuart_flush