Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / kernel / printk / braille.c

diff --git a/kernel/kernel/printk/braille.c b/kernel/kernel/printk/braille.c
new file mode 100644 (file)
index 0000000..276762f
--- /dev/null
+++ b/kernel/kernel/printk/braille.c
@@ -0,0 +1,49 @@
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/console.h>
+#include <linux/string.h>
+
+#include "console_cmdline.h"
+#include "braille.h"
+
+char *_braille_console_setup(char **str, char **brl_options)
+{
+       if (!memcmp(*str, "brl,", 4)) {
+               *brl_options = "";
+               *str += 4;
+       } else if (!memcmp(str, "brl=", 4)) {
+               *brl_options = *str + 4;
+               *str = strchr(*brl_options, ',');
+               if (!*str)
+                       pr_err("need port name after brl=\n");
+               else
+                       *((*str)++) = 0;
+       } else
+               return NULL;
+
+       return *str;
+}
+
+int
+_braille_register_console(struct console *console, struct console_cmdline *c)
+{
+       int rtn = 0;
+
+       if (c->brl_options) {
+               console->flags |= CON_BRL;
+               rtn = braille_register_console(console, c->index, c->options,
+                                              c->brl_options);
+       }
+
+       return rtn;
+}
+
+int
+_braille_unregister_console(struct console *console)
+{
+       if (console->flags & CON_BRL)
+               return braille_unregister_console(console);
+
+       return 0;
+}