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authorTimur Tabi <timur@freescale.com>2011-07-08 19:06:12 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2011-08-23 10:32:56 -0700
commitdcd83aaff1c8cbd5b48c152b559e0af3ea1a7b65 (patch)
tree536ce3416fd908f0506899b371d86fb21171078c /arch/powerpc/kernel/udbg.c
parentfcb8ce5cfe30ca9ca5c9a79cdfe26d1993e65e0c (diff)
tty/powerpc: introduce the ePAPR embedded hypervisor byte channel driver
The ePAPR embedded hypervisor specification provides an API for "byte channels", which are serial-like virtual devices for sending and receiving streams of bytes. This driver provides Linux kernel support for byte channels via three distinct interfaces: 1) An early-console (udbg) driver. This provides early console output through a byte channel. The byte channel handle must be specified in a Kconfig option. 2) A normal console driver. Output is sent to the byte channel designated for stdout in the device tree. The console driver is for handling kernel printk calls. 3) A tty driver, which is used to handle user-space input and output. The byte channel used for the console is designated as the default tty. Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch/powerpc/kernel/udbg.c')
-rw-r--r--arch/powerpc/kernel/udbg.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
index faa82c1f3f68..b4607a91d1f4 100644
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -67,6 +67,8 @@ void __init udbg_early_init(void)
udbg_init_usbgecko();
#elif defined(CONFIG_PPC_EARLY_DEBUG_WSP)
udbg_init_wsp();
+#elif defined(CONFIG_PPC_EARLY_DEBUG_EHV_BC)
+ udbg_init_ehv_bc();
#endif
#ifdef CONFIG_PPC_EARLY_DEBUG