powerpc: Improve prom_printf()

Adds the ability to print decimal numbers and adds some more
format string variants

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 25 insertions, 1 deletions

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 941ff4dbc567..7839bd7bfd15 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -335,6 +335,7 @@ static void __init prom_printf(const char *format, ...)
         const char *p, *q, *s;
         va_list args;
         unsigned long v;
+        long vs;
         struct prom_t *_prom = &RELOC(prom);
 
         va_start(args, format);
@@ -368,12 +369,35 @@ static void __init prom_printf(const char *format, ...)
                         v = va_arg(args, unsigned long);
                         prom_print_hex(v);
                         break;
+                case 'd':
+                        ++q;
+                        vs = va_arg(args, int);
+                        if (vs < 0) {
+                                prom_print(RELOC("-"));
+                                vs = -vs;
+                        }
+                        prom_print_dec(vs);
+                        break;
                 case 'l':
                         ++q;
-                        if (*q == 'u') { /* '%lu' */
+                        if (*q == 0)
+                                break;
+                        else if (*q == 'x') {
+                                ++q;
+                                v = va_arg(args, unsigned long);
+                                prom_print_hex(v);
+                        } else if (*q == 'u') { /* '%lu' */
                                 ++q;
                                 v = va_arg(args, unsigned long);
                                 prom_print_dec(v);
+                        } else if (*q == 'd') { /* %ld */
+                                ++q;
+                                vs = va_arg(args, long);
+                                if (vs < 0) {
+                                        prom_print(RELOC("-"));
+                                        vs = -vs;
+                                }
+                                prom_print_dec(vs);
                         }
                         break;
                 }