From: Russell King <rmk+lkml@arm.linux.org.uk>
To: "V. ANANDA KRISHNAN" <mansarov@us.ibm.com>
Cc: linux-kernel@vger.kernel.org, gregkh@suse.de
Subject: Re: serial pci driver
Date: Tue, 26 Jul 2005 17:33:39 +0100 [thread overview]
Message-ID: <20050726173339.A10838@flint.arm.linux.org.uk> (raw)
In-Reply-To: <1122393690.3524.11.camel@siliver.austin.ibm.com>; from mansarov@us.ibm.com on Tue, Jul 26, 2005 at 11:01:30AM -0500
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
prev parent reply other threads:[~2005-07-26 16:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-26 16:01 V. ANANDA KRISHNAN
2005-07-26 16:33 ` Russell King [this message]
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