@@ -171,6 +171,22 @@ After board configuration is done, fdt supported u-boot can be build in two ways
$ make DEVICE_TREE=<dts-file-name>
+Configuration Options
+---------------------
+
+A number of run-time configuration options are provided in the /config node
+of the control device tree. You can access these using fdtdec_get_config_int(),
+fdtdec_get_config_bool() and fdtdec_get_config_string().
+
+Available options are:
+
+silent-console
+ If present and non-zero, the console is silenced by default on boot.
+
+no-keyboard
+ Tells U-Boot not to expect an attached keyboard with a VGA console
+
+
Limitations
-----------
@@ -87,6 +87,7 @@
*/
#include <common.h>
+#include <fdtdec.h>
#include <version.h>
#include <malloc.h>
#include <linux/compiler.h>
@@ -2251,6 +2252,7 @@ int drv_video_init(void)
{
int skip_dev_init;
struct stdio_dev console_dev;
+ bool have_keyboard;
/* Check if video initialization should be skipped */
if (board_video_skip())
@@ -2262,11 +2264,18 @@ int drv_video_init(void)
if (board_cfb_skip())
return 0;
-#if !defined(CONFIG_VGA_AS_SINGLE_DEVICE)
- debug("KBD: Keyboard init ...\n");
- skip_dev_init |= (VIDEO_KBD_INIT_FCT == -1);
+#if defined(CONFIG_VGA_AS_SINGLE_DEVICE)
+ have_keyboard = false;
+#elif defined(CONFIG_OF_CONTROL)
+ have_keyboard = !fdtdec_get_config_bool(gd->fdt_blob,
+ "u-boot,no-keyboard");
+#else
+ have_keyboard = true;
#endif
-
+ if (have_keyboard) {
+ debug("KBD: Keyboard init ...\n");
+ skip_dev_init |= (VIDEO_KBD_INIT_FCT == -1);
+ }
if (skip_dev_init)
return 0;
@@ -2278,12 +2287,12 @@ int drv_video_init(void)
console_dev.putc = video_putc; /* 'putc' function */
console_dev.puts = video_puts; /* 'puts' function */
-#if !defined(CONFIG_VGA_AS_SINGLE_DEVICE)
- /* Also init console device */
- console_dev.flags |= DEV_FLAGS_INPUT;
- console_dev.tstc = VIDEO_TSTC_FCT; /* 'tstc' function */
- console_dev.getc = VIDEO_GETC_FCT; /* 'getc' function */
-#endif /* CONFIG_VGA_AS_SINGLE_DEVICE */
+ if (have_keyboard) {
+ /* Also init console device */
+ console_dev.flags |= DEV_FLAGS_INPUT;
+ console_dev.tstc = VIDEO_TSTC_FCT; /* 'tstc' function */
+ console_dev.getc = VIDEO_GETC_FCT; /* 'getc' function */
+ }
if (stdio_register(&console_dev) != 0)
return 0;
At present a VGA console assumes a keyboard unless a CONFIG option is set. This difference can be dealt with by a device tree option, allowing boards that are otherwise the same to use the same configuration. Signed-off-by: Simon Glass <sjg@chromium.org> --- doc/README.fdt-control | 16 ++++++++++++++++ drivers/video/cfb_console.c | 29 +++++++++++++++++++---------- 2 files changed, 35 insertions(+), 10 deletions(-)