Messages in this thread |  | | | Date | Thu, 19 May 2011 09:27:52 -0500 | | From | Timur Tabi <> | | Subject | Re: [PATCH 6/7] tty/powerpc: introduce the ePAPR embedded hypervisor byte channel driver |
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Greg KH wrote: > Why do this conversion in the driver? Shouldn't that be something that > userspace worries about?
The udbg interface is a very early kernel printk interface. I don't know what the "u" stands for, but "dbg" is for "debug". The udbg interface is removed once a normal console driver kicks in.
This is why I need to specify the byte channel handle via Kconfig. This code is used so early that not even the device tree is available.
All of the udbg_putc functions do this.
-- Timur Tabi Linux kernel developer at Freescale
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