From: Todd Poynor <tpoynor@mvista.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: Patrick Mochel <mochel@digitalimplant.org>,
linux-hotplug-devel@lists.sourceforge.net,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Hotplug for device power state changes
Date: Sat, 15 May 2004 02:08:54 +0000 [thread overview]
Message-ID: <40A57BB6.30503@mvista.com> (raw)
In-Reply-To: <20040514025053.GA14773@elf.ucw.cz>
Pavel Machek wrote:
> Hey, I want linux smartphone ;-).
Me too ;)
> In case of that dual-core CPU, does linux really run on both CPUs? Do
> we get sources for GSM network stack, too?
As Nicolas mentioned, the voiceband/RF stuff is probably on the DSP in
such systems and typically runs in a custom environment, perhaps with
libraries supplied by the silicon vendor. I am not myself familiar with
a Linux-based phone software offering that includes open source GSM
modem drivers or GSM/GPRS network stacks and such.
> Is there some preliminary docs about such beasts available somewhere?
Nicolas mentioned sites for the popular TI OMAP platform (ARM925/6T),
another is Renesas SH-Mobile. I'm not aware of writeups regarding Linux
support for CPU+DSP designs, if that's of interest; in my capacity I
mostly treat the DSP as an unmanaged black box device. But in the
context of power management there are a few unavoidable interactions,
for example, phone software developers get cranky when Linux decides to
power down some or all of the system while the DSP was busy doing
something important and there's a common clock or power domain.
Todd
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prev parent reply other threads:[~2004-05-15 2:08 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20040429202654.GA9971@dhcp193.mvista.com>
2004-04-29 21:42 ` [PATCH] Hotplug for device power state changes Russell King
2004-04-29 22:36 ` Todd Poynor
2004-04-30 0:50 ` Benjamin Herrenschmidt
2004-04-30 8:30 ` Russell King
2004-04-30 19:59 ` Todd Poynor
2004-04-30 21:56 ` Greg KH
2004-05-01 1:16 ` Todd Poynor
2004-05-01 1:48 ` Greg KH
2004-05-03 21:33 ` Todd Poynor
2004-05-01 0:03 ` Nigel Cunningham
2004-05-03 22:04 ` Todd Poynor
2004-04-30 19:07 ` Todd Poynor
2004-05-15 1:40 ` Nicolas Pitre
2004-05-15 23:34 ` Pavel Machek
[not found] ` <Pine.LNX.4.50.0405040819490.3562-100000@monsoon.he.net>
2004-05-04 20:36 ` Todd Poynor
[not found] ` <Pine.LNX.4.50.0405042110440.30304-100000@monsoon.he.net>
2004-05-06 1:08 ` Todd Poynor
2004-05-14 2:50 ` Pavel Machek
2004-05-15 2:08 ` Todd Poynor [this message]
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