* serial pci driver
@ 2005-07-26 16:01 V. ANANDA KRISHNAN
2005-07-26 16:33 ` Russell King
0 siblings, 1 reply; 2+ messages in thread
From: V. ANANDA KRISHNAN @ 2005-07-26 16:01 UTC (permalink / raw)
To: linux-kernel; +Cc: gregkh
Hi,
Can some one help me to understand the function of reg_shift in the
pci_board structure and how it is used? Thanks for your help.
Ananda Krishnan.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: serial pci driver
2005-07-26 16:01 serial pci driver V. ANANDA KRISHNAN
@ 2005-07-26 16:33 ` Russell King
0 siblings, 0 replies; 2+ messages in thread
From: Russell King @ 2005-07-26 16:33 UTC (permalink / raw)
To: V. ANANDA KRISHNAN; +Cc: linux-kernel, gregkh
On Tue, Jul 26, 2005 at 11:01:30AM -0500, V. ANANDA KRISHNAN wrote:
> Can some one help me to understand the function of reg_shift in the
> pci_board structure and how it is used? Thanks for your help.
It represents the log2 byte spacing between each register of the
serial port. Some serial ports are wired up such that the registers
are sparsely mapped into memory space, so reg_shift tells the serial
driver about this.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
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