From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Grant Likely <grant.likely@secretlab.ca>
Cc: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>,
Kevin Hilman <khilman@ti.com>,
Segher Boessenkool <segher@kernel.crashing.org>,
Arnd Bergmann <arnd@arndb.de>,
devicetree-discuss@lists.ozlabs.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"Rafael J. Wysocki" <rjw@sisk.pl>,
Jeremy Kerr <jeremy.kerr@canonical.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 2/2] drivers/amba: probe via device tree
Date: Sun, 22 May 2011 00:47:25 +0100 [thread overview]
Message-ID: <20110521234725.GB17672@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <BANLkTi=8vX1Cs_fzpQXZBuuDuLYLu1FGmg@mail.gmail.com>
On Sat, May 21, 2011 at 11:42:34AM -0600, Grant Likely wrote:
> Russell, it seems to me that the primary behaviour that amba_bus has
> over platform_bus is the clock management, and secondarily
> verification of the type of device by the device id. Am I correct, or
> am I missing something?
It matches by vendor/device ID just like PCI does, and does the bus
clock management and power management in a really nice way, which I
doubt platform devices will ever do.
The way this discussion is going, I'm going to suggest that we also
convert PCI stuff to being platform devices too. I don't see the
point of PCI existing for all the same reasons being given in this
thread.
WARNING: multiple messages have this Message-ID (diff)
From: Russell King - ARM Linux <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>
To: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Cc: Kevin Hilman <khilman-l0cyMroinI0@public.gmane.org>,
Linux Kernel Mailing List
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"Rafael J. Wysocki" <rjw-KKrjLPT3xs0@public.gmane.org>,
Jeremy Kerr <jeremy.kerr-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>,
devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [PATCH 2/2] drivers/amba: probe via device tree
Date: Sun, 22 May 2011 00:47:25 +0100 [thread overview]
Message-ID: <20110521234725.GB17672@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <BANLkTi=8vX1Cs_fzpQXZBuuDuLYLu1FGmg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Sat, May 21, 2011 at 11:42:34AM -0600, Grant Likely wrote:
> Russell, it seems to me that the primary behaviour that amba_bus has
> over platform_bus is the clock management, and secondarily
> verification of the type of device by the device id. Am I correct, or
> am I missing something?
It matches by vendor/device ID just like PCI does, and does the bus
clock management and power management in a really nice way, which I
doubt platform devices will ever do.
The way this discussion is going, I'm going to suggest that we also
convert PCI stuff to being platform devices too. I don't see the
point of PCI existing for all the same reasons being given in this
thread.
WARNING: multiple messages have this Message-ID (diff)
From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] drivers/amba: probe via device tree
Date: Sun, 22 May 2011 00:47:25 +0100 [thread overview]
Message-ID: <20110521234725.GB17672@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <BANLkTi=8vX1Cs_fzpQXZBuuDuLYLu1FGmg@mail.gmail.com>
On Sat, May 21, 2011 at 11:42:34AM -0600, Grant Likely wrote:
> Russell, it seems to me that the primary behaviour that amba_bus has
> over platform_bus is the clock management, and secondarily
> verification of the type of device by the device id. Am I correct, or
> am I missing something?
It matches by vendor/device ID just like PCI does, and does the bus
clock management and power management in a really nice way, which I
doubt platform devices will ever do.
The way this discussion is going, I'm going to suggest that we also
convert PCI stuff to being platform devices too. I don't see the
point of PCI existing for all the same reasons being given in this
thread.
next prev parent reply other threads:[~2011-05-21 23:47 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-19 18:28 [PATCH v2 0/2] amba bus device tree probing Rob Herring
2011-05-19 18:28 ` Rob Herring
[not found] ` <1305829704-11774-1-git-send-email-robherring2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2011-05-19 18:28 ` [PATCH 1/2] dt: check for devices already created fron DT scan Rob Herring
2011-05-19 18:28 ` Rob Herring
[not found] ` <1305829704-11774-2-git-send-email-robherring2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2011-05-19 19:54 ` Grant Likely
2011-05-19 19:54 ` Grant Likely
2011-05-19 18:28 ` [PATCH 2/2] drivers/amba: probe via device tree Rob Herring
2011-05-19 18:28 ` Rob Herring
[not found] ` <1305829704-11774-3-git-send-email-robherring2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2011-05-19 20:01 ` Grant Likely
2011-05-19 20:01 ` Grant Likely
[not found] ` <20110519200158.GW5109-e0URQFbLeQY2iJbIjFUEsiwD8/FfD2ys@public.gmane.org>
2011-05-19 23:30 ` Rob Herring
2011-05-19 23:30 ` Rob Herring
2011-05-19 23:39 ` Grant Likely
2011-05-19 23:39 ` Grant Likely
[not found] ` <20110519233958.GB18181-e0URQFbLeQY2iJbIjFUEsiwD8/FfD2ys@public.gmane.org>
2011-05-20 13:24 ` Rob Herring
2011-05-20 13:24 ` Rob Herring
[not found] ` <4DD66B8A.5040404-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2011-05-20 14:21 ` Arnd Bergmann
2011-05-20 14:21 ` Arnd Bergmann
[not found] ` <201105201621.03801.arnd-r2nGTMty4D4@public.gmane.org>
2011-05-20 15:17 ` Rob Herring
2011-05-20 15:17 ` Rob Herring
[not found] ` <4DD68614.6090209-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2011-05-20 16:08 ` Stephen Neuendorffer
2011-05-20 16:08 ` Stephen Neuendorffer
2011-05-21 17:42 ` Grant Likely
2011-05-21 17:42 ` Grant Likely
2011-05-21 23:47 ` Russell King - ARM Linux [this message]
2011-05-21 23:47 ` Russell King - ARM Linux
2011-05-21 23:47 ` Russell King - ARM Linux
2011-05-22 10:00 ` Rafael J. Wysocki
2011-05-22 10:00 ` Rafael J. Wysocki
2011-05-22 10:00 ` Rafael J. Wysocki
2011-05-22 15:46 ` Rob Herring
2011-05-22 15:46 ` Rob Herring
2011-05-22 15:46 ` Rob Herring
2011-05-23 15:23 ` Grant Likely
2011-05-23 15:23 ` Grant Likely
2011-05-22 10:03 ` Arnd Bergmann
2011-05-22 10:03 ` Arnd Bergmann
2011-05-22 10:03 ` Arnd Bergmann
2011-05-25 9:03 ` Linus Walleij
2011-05-25 9:03 ` Linus Walleij
2011-05-23 9:37 ` Kristoffer Glembo
2011-05-23 9:37 ` Kristoffer Glembo
2011-05-23 9:37 ` Kristoffer Glembo
2011-05-23 9:58 ` Russell King - ARM Linux
2011-05-23 9:58 ` Russell King - ARM Linux
2011-05-23 15:09 ` Grant Likely
2011-05-23 15:09 ` Grant Likely
2011-05-23 15:09 ` Grant Likely
2011-05-24 15:03 ` Rob Herring
2011-05-24 15:03 ` Rob Herring
2011-05-24 15:03 ` Rob Herring
2011-05-25 3:02 ` Shawn Guo
2011-05-25 3:02 ` Shawn Guo
2011-05-25 3:02 ` Shawn Guo
2011-05-25 9:07 ` Linus Walleij
2011-05-25 9:07 ` Linus Walleij
[not found] ` <a42f0c27-2811-4b68-bedf-7dfaa7bff6ff-+Ck8Kgl/v0/6UOWq+LNw4LjjLBE8jN/0@public.gmane.org>
2011-05-21 23:35 ` Russell King - ARM Linux
2011-05-21 23:35 ` Russell King - ARM Linux
[not found] ` <20110521233558.GA17672-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2011-05-23 15:00 ` Stephen Neuendorffer
2011-05-23 15:00 ` Stephen Neuendorffer
[not found] ` <1007bcf2-7786-4f03-bff7-8d8af83939f1-+Ck8Kgl/v0+GljRhoabY2LjjLBE8jN/0@public.gmane.org>
2011-05-23 15:47 ` Russell King - ARM Linux
2011-05-23 15:47 ` Russell King - ARM Linux
2011-05-21 4:00 ` Segher Boessenkool
2011-05-21 4:00 ` Segher Boessenkool
[not found] ` <80f20ac921a33e9f0bf3e249f539a8ef-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>
2011-05-21 14:55 ` Rob Herring
2011-05-21 14:55 ` Rob Herring
[not found] ` <4DD7D24D.2070604-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2011-05-21 15:18 ` Segher Boessenkool
2011-05-21 15:18 ` Segher Boessenkool
[not found] ` <ad5605c2a3d4b36f63f36f52afe89cfd-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>
2011-05-21 17:43 ` Grant Likely
2011-05-21 17:43 ` Grant Likely
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