From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 06/14] mfd: Initialise the DB8500 PRCMU driver at core_initcall time
Date: Tue, 12 Jun 2012 12:59:38 +0000 [thread overview]
Message-ID: <201206121259.38807.arnd@arndb.de> (raw)
In-Reply-To: <4FD6FF6C.6040500@linaro.org>
On Tuesday 12 June 2012, Lee Jones wrote:
> On 11/06/12 22:01, Linus Walleij wrote:
> > Hm what shall we do when we run out of initlevels? I think this was the
> > kind of thing that deferred probe should solve. Usually changing this kind
> > of thing has side effects so I'm a bit hesitant.
>
> Ah yes, I remember now. The IRQ domain needs to be in place before the
> Device Tree is parsed by the Open Firmware subsystem. If it's not the
> error "no irq domain found" is triggered and the IRQs are never mapped.
>
> I'd be happy to take a second opinion, but I believe this (and the other
> core_initcall patch) is required.
It's still just a hack. The real solution that we discussed last time it
came up is to defer the translation of irq numbers until device driver
probe time, and bail out with -EPROBE_DEFER if you try to use a device
whose interrupt is not available yet.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: Lee Jones <lee.jones@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>,
grant.likely@secretlab.ca, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linus.walleij@stericsson.com,
Samuel Ortiz <sameo@linux.intel.com>
Subject: Re: [PATCH 06/14] mfd: Initialise the DB8500 PRCMU driver at core_initcall time
Date: Tue, 12 Jun 2012 12:59:38 +0000 [thread overview]
Message-ID: <201206121259.38807.arnd@arndb.de> (raw)
In-Reply-To: <4FD6FF6C.6040500@linaro.org>
On Tuesday 12 June 2012, Lee Jones wrote:
> On 11/06/12 22:01, Linus Walleij wrote:
> > Hm what shall we do when we run out of initlevels? I think this was the
> > kind of thing that deferred probe should solve. Usually changing this kind
> > of thing has side effects so I'm a bit hesitant.
>
> Ah yes, I remember now. The IRQ domain needs to be in place before the
> Device Tree is parsed by the Open Firmware subsystem. If it's not the
> error "no irq domain found" is triggered and the IRQs are never mapped.
>
> I'd be happy to take a second opinion, but I believe this (and the other
> core_initcall patch) is required.
It's still just a hack. The real solution that we discussed last time it
came up is to defer the translation of irq numbers until device driver
probe time, and bail out with -EPROBE_DEFER if you try to use a device
whose interrupt is not available yet.
Arnd
next prev parent reply other threads:[~2012-06-12 12:59 UTC|newest]
Thread overview: 234+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-11 15:24 [PATCH 00/14] Final (large) batch of Snowball Device Tree Enablement Lee Jones
2012-06-11 15:24 ` Lee Jones
2012-06-11 15:24 ` [PATCH 01/14] rtc: ab8500-rtc: IRQF_ONESHOT when requesting a threaded IRQ Lee Jones
2012-06-11 15:24 ` Lee Jones
2012-06-11 15:31 ` Arnd Bergmann
2012-06-11 15:31 ` Arnd Bergmann
2012-06-11 15:37 ` Lee Jones
2012-06-11 15:37 ` Lee Jones
2012-06-11 15:51 ` Greg Kroah-Hartman
2012-06-11 15:51 ` Greg Kroah-Hartman
2012-06-11 16:01 ` Lee Jones
2012-06-11 16:01 ` Lee Jones
2012-06-11 20:54 ` [rtc-linux] " Linus Walleij
2012-06-11 20:54 ` Linus Walleij
2012-06-12 8:57 ` Lee Jones
2012-06-12 8:57 ` Lee Jones
2012-06-13 22:25 ` Andrew Morton
2012-06-13 22:25 ` Andrew Morton
2012-06-14 7:14 ` Lee Jones
2012-06-14 7:14 ` Lee Jones
2012-06-14 7:30 ` Andrew Morton
2012-06-14 7:30 ` Andrew Morton
2012-06-14 8:02 ` Lee Jones
2012-06-14 8:02 ` Lee Jones
2012-06-11 15:24 ` [PATCH 02/14] rtc: Ensure correct probing of the AB8500 RTC when Device Tree is enabled Lee Jones
2012-06-11 15:24 ` Lee Jones
2012-06-11 20:56 ` [rtc-linux] " Linus Walleij
2012-06-11 20:56 ` Linus Walleij
2012-07-02 15:23 ` Lee Jones
2012-07-02 15:23 ` Lee Jones
2012-06-11 15:24 ` [PATCH 03/14] mfd: ab8500-gpadc: Enable IRQF_ONESHOT when requesting a threaded IRQ Lee Jones
2012-06-11 15:24 ` Lee Jones
2012-06-11 20:54 ` Linus Walleij
2012-06-11 20:54 ` Linus Walleij
2012-06-12 8:58 ` Lee Jones
2012-06-12 8:58 ` Lee Jones
2012-06-11 15:24 ` [PATCH 04/14] mfd: Remove redundant Kconfig entry Lee Jones
2012-06-11 15:24 ` Lee Jones
2012-06-11 20:57 ` Linus Walleij
2012-06-11 20:57 ` Linus Walleij
2012-06-11 15:24 ` [PATCH 05/14] mfd: Enable DT probing of the DB8500 PRCMU Lee Jones
2012-06-11 15:24 ` Lee Jones
2012-06-11 20:58 ` Linus Walleij
2012-06-11 20:58 ` Linus Walleij
2012-06-29 14:47 ` Samuel Ortiz
2012-06-29 14:47 ` Samuel Ortiz
2012-06-11 15:24 ` [PATCH 06/14] mfd: Initialise the DB8500 PRCMU driver at core_initcall time Lee Jones
2012-06-11 15:24 ` Lee Jones
2012-06-11 21:01 ` Linus Walleij
2012-06-11 21:01 ` Linus Walleij
2012-06-12 8:11 ` Lee Jones
2012-06-12 8:11 ` Lee Jones
2012-06-12 8:35 ` Lee Jones
2012-06-12 8:35 ` Lee Jones
2012-06-12 12:59 ` Arnd Bergmann [this message]
2012-06-12 12:59 ` Arnd Bergmann
2012-06-12 13:23 ` Lee Jones
2012-06-12 13:23 ` Lee Jones
2012-06-12 14:49 ` Arnd Bergmann
2012-06-12 14:49 ` Arnd Bergmann
2012-06-12 15:39 ` Lee Jones
2012-06-12 15:39 ` Lee Jones
2012-06-18 8:32 ` Lee Jones
2012-06-18 8:32 ` Lee Jones
2012-06-29 14:48 ` Samuel Ortiz
2012-06-29 14:48 ` Samuel Ortiz
2012-06-11 15:25 ` [PATCH 07/14] mfd: Initialise the AB8500 " Lee Jones
2012-06-11 15:25 ` Lee Jones
2012-06-11 21:03 ` Linus Walleij
2012-06-11 21:03 ` Linus Walleij
2012-06-12 8:13 ` Lee Jones
2012-06-12 8:13 ` Lee Jones
2012-06-12 8:37 ` Lee Jones
2012-06-12 8:37 ` Lee Jones
2012-06-29 14:51 ` Samuel Ortiz
2012-06-29 14:51 ` Samuel Ortiz
2012-06-11 15:25 ` [PATCH 08/14] mfd: Add IRQ domain support for the AB8500 Lee Jones
2012-06-11 15:25 ` Lee Jones
2012-06-11 21:33 ` Linus Walleij
2012-06-11 21:33 ` Linus Walleij
2012-06-12 8:01 ` Lee Jones
2012-06-12 8:01 ` Lee Jones
2012-06-14 18:32 ` Mark Brown
2012-06-14 18:32 ` Mark Brown
2012-06-15 12:49 ` Lee Jones
2012-06-15 12:49 ` Lee Jones
2012-06-18 9:02 ` Lee Jones
2012-06-18 9:02 ` Lee Jones
2012-06-18 9:32 ` Mark Brown
2012-06-18 9:32 ` Mark Brown
2012-06-18 10:20 ` Russell King - ARM Linux
2012-06-18 10:20 ` Russell King - ARM Linux
2012-06-18 18:56 ` Mark Brown
2012-06-18 18:56 ` Mark Brown
2012-06-20 13:00 ` Lee Jones
2012-06-20 13:00 ` Lee Jones
2012-06-21 7:37 ` Linus Walleij
2012-06-21 7:37 ` Linus Walleij
2012-06-26 9:04 ` Lee Jones
2012-06-26 9:04 ` Lee Jones
2012-06-20 9:12 ` Linus Walleij
2012-06-20 9:12 ` Linus Walleij
2012-06-11 15:25 ` [PATCH 09/14] i2c: Add Device Tree support to the Nomadik I2C driver Lee Jones
2012-06-11 15:25 ` Lee Jones
2012-06-11 19:05 ` Wolfram Sang
2012-06-11 19:05 ` Wolfram Sang
2012-06-12 7:23 ` Lee Jones
2012-06-12 7:23 ` Lee Jones
[not found] ` <20120611190550.GK3887-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2012-06-12 8:52 ` Lee Jones
2012-06-12 8:52 ` Lee Jones
2012-06-12 8:52 ` Lee Jones
[not found] ` <4FD70357.9060905-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2012-06-12 8:57 ` Wolfram Sang
2012-06-12 8:57 ` Wolfram Sang
2012-06-12 8:57 ` Wolfram Sang
[not found] ` <1339428307-3850-10-git-send-email-lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2012-06-11 20:37 ` Linus Walleij
2012-06-11 20:37 ` Linus Walleij
2012-06-11 20:37 ` Linus Walleij
[not found] ` <CACRpkdaMDbH4NkiHRLAfbJZ_j4QXbwg94bvaWsdYRPH+dSfc8Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-06-12 7:34 ` Lee Jones
2012-06-12 7:34 ` Lee Jones
2012-06-12 7:34 ` Lee Jones
[not found] ` <4FD6F0E8.5040606-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2012-06-13 5:40 ` Linus Walleij
2012-06-13 5:40 ` Linus Walleij
2012-06-13 5:40 ` Linus Walleij
[not found] ` <CACRpkdYxiT-0x4aetMxB2x8SkB+Mmy8rk8uSzgU_anemSayhMw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-06-13 7:01 ` Lee Jones
2012-06-13 7:01 ` Lee Jones
2012-06-13 7:01 ` Lee Jones
2012-06-13 8:12 ` Linus Walleij
2012-06-13 8:12 ` Linus Walleij
[not found] ` <CACRpkdZC8E6izDpdnWy6DMjOdA6KsqTaPoaq9pErWoNW0Ewytw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-06-13 12:28 ` Lee Jones
2012-06-13 12:28 ` Lee Jones
2012-06-13 12:28 ` Lee Jones
[not found] ` <4FD88761.9050703-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2012-06-14 18:36 ` Mark Brown
2012-06-14 18:36 ` Mark Brown
2012-06-14 18:36 ` Mark Brown
[not found] ` <20120614183636.GB30185-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2012-06-14 18:46 ` Mark Brown
2012-06-14 18:46 ` Mark Brown
2012-06-14 18:46 ` Mark Brown
2012-06-14 18:59 ` Lee Jones
2012-06-14 18:59 ` Lee Jones
2012-06-14 18:57 ` Lee Jones
2012-06-14 18:57 ` Lee Jones
2012-06-14 18:57 ` Lee Jones
[not found] ` <4FDA341C.8010501-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2012-06-15 9:32 ` Mark Brown
2012-06-15 9:32 ` Mark Brown
2012-06-15 9:32 ` Mark Brown
2012-06-15 10:00 ` Lee Jones
2012-06-15 10:00 ` Lee Jones
2012-06-15 10:32 ` Russell King - ARM Linux
2012-06-15 10:32 ` Russell King - ARM Linux
[not found] ` <20120615103233.GA19046-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2012-06-15 11:43 ` Lee Jones
2012-06-15 11:43 ` Lee Jones
2012-06-15 11:43 ` Lee Jones
2012-06-13 16:07 ` [PATCH 1/3] " Lee Jones
2012-06-13 16:07 ` Lee Jones
2012-06-13 16:07 ` Lee Jones
[not found] ` <4FD8BAD2.50703-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2012-06-14 17:12 ` Linus Walleij
2012-06-14 17:12 ` Linus Walleij
2012-06-14 17:12 ` Linus Walleij
[not found] ` <CACRpkdZFi34nChnMEo6yik67zk9owZLk-6zcdP7mmOXyLz8uqQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-06-15 9:02 ` Lee Jones
2012-06-15 9:02 ` Lee Jones
2012-06-15 9:02 ` Lee Jones
[not found] ` <CAE2-_9rRYxjU9QQgtBv9ReMY5x+oRiJG1cDQahYHanjDrwVUYA@mail.gmail.com>
[not found] ` <CAE2-_9rRYxjU9QQgtBv9ReMY5x+oRiJG1cDQahYHanjDrwVUYA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-06-15 11:50 ` Fwd: " Srinidhi Kasagar
2012-06-15 11:50 ` Srinidhi Kasagar
2012-06-15 11:50 ` Srinidhi Kasagar
2012-06-15 12:45 ` Lee Jones
2012-06-15 12:45 ` Lee Jones
2012-06-15 12:45 ` Lee Jones
[not found] ` <4FDB2E57.4030904-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2012-06-15 13:05 ` Srinidhi Kasagar
2012-06-15 13:05 ` Srinidhi Kasagar
2012-06-15 13:05 ` Srinidhi Kasagar
2012-06-15 13:18 ` Lee Jones
2012-06-15 13:18 ` Lee Jones
2012-06-15 13:18 ` Lee Jones
[not found] ` <4FDB3642.5030804-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2012-06-15 13:37 ` Srinidhi Kasagar
2012-06-15 13:37 ` Srinidhi Kasagar
2012-06-15 13:37 ` Srinidhi Kasagar
2012-06-15 13:58 ` Lee Jones
2012-06-15 13:58 ` Lee Jones
2012-06-15 13:58 ` Lee Jones
2012-06-17 17:43 ` Linus Walleij
2012-06-17 17:43 ` Linus Walleij
2012-06-17 17:43 ` Linus Walleij
[not found] ` <CACRpkdZ7ESKhokk8Z+6sC9Kq+jPztFNwzger0Db7nCD1fPnG1A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-06-18 7:18 ` Lee Jones
2012-06-18 7:18 ` Lee Jones
2012-06-18 7:18 ` Lee Jones
2012-06-18 7:58 ` Srinidhi Kasagar
2012-06-18 7:58 ` Srinidhi Kasagar
2012-06-18 7:58 ` Srinidhi Kasagar
2012-06-18 8:41 ` Lee Jones
2012-06-18 8:41 ` Lee Jones
2012-06-18 8:41 ` Lee Jones
2012-06-13 16:08 ` [PATCH 3/3] Documentation: Device Tree binding information for i2c-nomadik driver Lee Jones
2012-06-13 16:08 ` Lee Jones
2012-06-13 16:08 ` Lee Jones
[not found] ` <4FD8BAF8.10806-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2012-06-14 17:13 ` Linus Walleij
2012-06-14 17:13 ` Linus Walleij
2012-06-14 17:13 ` Linus Walleij
2012-06-13 16:08 ` [PATCH 2/3] ARM: ux500: Add i2c configurations to the Device Tree for DB8500 based devices Lee Jones
2012-06-13 16:08 ` Lee Jones
[not found] ` <4FD8BAE4.4050606-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2012-06-14 17:13 ` Linus Walleij
2012-06-14 17:13 ` Linus Walleij
2012-06-14 17:13 ` Linus Walleij
2012-06-18 11:29 ` Linus Walleij
2012-06-18 11:29 ` Linus Walleij
2012-06-18 11:29 ` Linus Walleij
[not found] ` <CACRpkda2pH1by2hajpP20CJgdg+mWFF=QaGbeNdY=c8iOVtLUQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-06-18 11:37 ` Lee Jones
2012-06-18 11:37 ` Lee Jones
2012-06-18 11:37 ` Lee Jones
2012-06-11 15:25 ` [PATCH 10/14] Input: Add Device Tree support to the ab8500-ponkey driver Lee Jones
2012-06-11 15:25 ` Lee Jones
2012-06-11 15:25 ` [PATCH 11/14] usb: otg: Enable probing of the ab8500 during a Device Tree boot Lee Jones
2012-06-11 15:25 ` Lee Jones
2012-06-11 21:39 ` Linus Walleij
2012-06-11 21:39 ` Linus Walleij
2012-07-02 15:24 ` Lee Jones
2012-07-02 15:24 ` Lee Jones
2012-06-11 15:25 ` [PATCH 12/14] ARM: ux500: Correctly reference IRQs supplied by the AB8500 from Device Tree Lee Jones
2012-06-11 15:25 ` Lee Jones
2012-06-11 21:41 ` Linus Walleij
2012-06-11 21:41 ` Linus Walleij
2012-06-11 15:25 ` [PATCH 13/14] ARM: ux500: Enable the AB8500 RTC for all DT:ed DB8500 based devices Lee Jones
2012-06-11 15:25 ` Lee Jones
2012-06-11 21:42 ` Linus Walleij
2012-06-11 21:42 ` Linus Walleij
2012-06-11 15:25 ` [PATCH 14/14] ARM: ux500: Move rtc-pl031 registration to Device Tree when enabled Lee Jones
2012-06-11 15:25 ` Lee Jones
2012-06-11 21:43 ` Linus Walleij
2012-06-11 21:43 ` Linus Walleij
2012-06-12 8:03 ` Lee Jones
2012-06-12 8:03 ` Lee Jones
2012-06-12 14:32 ` Linus Walleij
2012-06-12 14:32 ` Linus Walleij
2012-06-12 14:44 ` Lee Jones
2012-06-12 14:44 ` Lee Jones
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