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Diffstat (limited to 'arch/powerpc/kernel/udbg_16550.c')
-rw-r--r--arch/powerpc/kernel/udbg_16550.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/udbg_16550.c b/arch/powerpc/kernel/udbg_16550.c
index 7afab5bcd61a..833a3d0bcfa7 100644
--- a/arch/powerpc/kernel/udbg_16550.c
+++ b/arch/powerpc/kernel/udbg_16550.c
@@ -206,11 +206,22 @@ static void udbg_44x_as1_putc(char c)
}
}
+static int udbg_44x_as1_getc(void)
+{
+ if (udbg_comport) {
+ while ((as1_readb(&udbg_comport->lsr) & LSR_DR) == 0)
+ ; /* wait for char */
+ return as1_readb(&udbg_comport->rbr);
+ }
+ return -1;
+}
+
void __init udbg_init_44x_as1(void)
{
udbg_comport =
(volatile struct NS16550 __iomem *)PPC44x_EARLY_DEBUG_VIRTADDR;
udbg_putc = udbg_44x_as1_putc;
+ udbg_getc = udbg_44x_as1_getc;
}
#endif /* CONFIG_PPC_EARLY_DEBUG_44x */