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Commit 70dea47d authored by Hollis Blanchard's avatar Hollis Blanchard Committed by Josh Boyer
Browse files

[POWERPC] 4xx: Implement udbg_getc() for 440 



Implement udbg_getc() for 440, which fixes xmon input.

Signed-off-by: default avatarHollis Blanchard <hollisb@us.ibm.com>
Acked-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: default avatarJosh Boyer <jwboyer@linux.vnet.ibm.com>
parent 504ca43e

arch/powerpc/kernel/udbg_16550.c

+11 −0
Original line number Diff line number Diff line
@@ -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 */