From mboxrd@z Thu Jan 1 00:00:00 1970 From: "KOCHI, Takayoshi" Date: Thu, 24 Oct 2002 05:59:34 +0000 Subject: [Linux-ia64] Re: PCI Hotplug Drivers for 2.5 Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org Hi, On Wed, 23 Oct 2002 22:10:08 -0700 Greg KH wrote: > Also, why doesn't the ACPI PCI hotplug driver work for your machines? > I've seen it work on a very wide range of processors (i386 and ia64), > and manufacturers, and any specific issues with your hardware would > probably be better addressed with patches to the existing ACPI driver. The ACPI spec provides very limited control of actual hardware (With ACPI, we don't have common method for controlling such as Bus speed, LED etc.). So if a hardware comes with well-documented hotplug controller, we can achieve finer control over the hardware. The SHPC specification defines it still depends on ACPI for managing resources, etc. So resource management portion can be and *should be* shared with all PCI hotplug drivers that use ACPI for resource management. I think the most important thing is everyone agree on the direction in which we should go before we code anything, in order not to waste our time. Thanks, -- KOCHI, Takayoshi