Commit Graph

44 Commits

Author SHA1 Message Date
Linus Torvalds 3d1482fe7a Pin control subsystem changes for kernel 3.5:
- Generic Device Tree bindings and hooks for drivers so we can
  move over modern drivers to using this.
 - Device Tree bindings for Tegra SoCs.
 - Funneling some devicetree helper code for the drivers/of
  subsystem.
 - New pin control drivers for:
  - Freescale MXS
  - Freescale i.MX51
  - Freescale i.MX53
  - All of these use Device Tree bindings.
 - Dummy pinctrl handles for stepwise migration to pinctrl, akin
  to dummy regulators.
 - Minor non-urgent fixes and improvments.
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Merge tag 'pinctrl-for-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pin control subsystem changes from Linus Walleij:

 - Generic Device Tree bindings and hooks for drivers so we can move
   over modern drivers to using this.

 - Device Tree bindings for Tegra SoCs.

 - Funneling some devicetree helper code for the drivers/of subsystem.

 - New pin control drivers for:
   * Freescale MXS
   * Freescale i.MX51
   * Freescale i.MX53
     All of these use Device Tree bindings.

 - Dummy pinctrl handles for stepwise migration to pinctrl, akin to
   dummy regulators.
 - Minor non-urgent fixes and improvments.

Fix up trivial conflicts in Documentation/driver-model/devres.txt and
drivers/pinctrl/core.c,

* tag 'pinctrl-for-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (46 commits)
  pinctrl: pinctrl-imx: add imx51 pinctrl driver
  pinctrl: pinctrl-imx: add imx53 pinctrl driver
  pinctrl: pinctrl-pxa3xx: remove empty pinmux disable function
  pinctrl: pinctrl-mxs: remove empty pinmux disable function
  pinctrl: pinctrl-imx: remove empty pinmux disable function
  pinctrl: make pinmux disable function optional
  pinctrl: a minor error checking improvement for pinconf
  pinctrl: mxs: skip gpio nodes for group creation
  pinctrl: mxs: create group for pin config node
  pinctrl: (cosmetic) fix two entries in DocBook comments
  pinctrl: add more info to error msgs in pin_request
  pinctrl: add pinctrl-mxs support
  pinctrl: pinctrl-imx: add imx6q pinctrl driver
  pinctrl: pinctrl-imx: add imx pinctrl core driver
  dt: add of_get_child_count helper function
  pinctrl: support gpio request deferred probing
  pinctrl: add pinctrl_provide_dummies interface for platforms to use
  pinctrl: enhance reporting of errors when loading from DT
  pinctrl: add kerneldoc for pinctrl_ops device tree functions
  pinctrl: propagate map validation errors
  ...
2012-05-21 16:58:23 -07:00
Mark Brown a8a97db984 ARM: 7376/1: clkdev: Implement managed clk_get()
Allow clk API users to simplify their cleanup paths by providing a
managed version of clk_get() and clk_put().

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-04-19 19:34:18 +01:00
Stephen Warren 6d4ca1fb46 pinctrl: implement devm_pinctrl_get()/put()
These functions allow the driver core to automatically clean up any
allocations made by drivers, thus leading to simplified drivers.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-04-18 13:53:13 +02:00
Mark Brown c02f935f5f Merge remote-tracking branches 'regulator/topic/devm' and 'regulator/topic/stub' into regulator-next 2012-03-18 21:38:28 +00:00
Axel Lin c1432b1ebc regulator: add devm_regulator_* to the list of managed interfaces
Add devm_regulator_put() and devm_regulator_bulk_get() to the list of managed
interfaces.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-01-31 11:18:56 +00:00
Wolfram Sang 543f43ce87 Documentation: devres: add allocation functions to list of supported calls
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: Greg KH <gregkh@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2012-01-24 10:47:42 -08:00
Stephen Boyd 070b907922 regulator: Add devm_regulator_get()
Add a resource managed regulator_get() to simplify regulator
usage in drivers. This allows driver authors to "get and forget"
about their regulators by automatically calling regulator_put()
when the driver is detached.

[Fixed up a couple of coding style issues -- broonie]

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-01-20 12:02:55 +00:00
Wolfram Sang 72f8c0bfa0 lib: devres: add convenience function to remap a resource
Almost every platform_driver does the three steps get_resource,
request_mem_region, ioremap. This does not only lead to a lot of code
duplication, but also a huge number of similar error strings and
inconsistent error codes on failure. So, introduce a helper function
which simplifies remapping a resource and make it hard to do something
wrong and add documentation for it.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-11-15 16:07:39 -08:00
Bart Van Assche b7565fa3a4 docs/driver-model: Update device class docs
The driver model documentation was added to the kernel tree before
struct class was added to <linux/device.h>. Hence this patch that
updates the paragraph about struct class in
Documentation/driver-model/binding.txt.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-24 16:01:24 -07:00
Bart Van Assche d58cb9cc8a docs/driver-model: Document device.groups
Several drivers use device_create_file() where device.groups should be
used instead. This patch documents that and also removes the comments
about device classes since these should not be used in new code in the
way documented until now in Documentation/driver-model/device.txt.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-24 16:01:24 -07:00
Robert P. J. Day b6badddccc DOCUMENTATION: Replace create_device() with device_create().
Fix a rather obvious typo.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-06-07 10:04:22 -07:00
Robert P. J. Day 5464e9c721 DOCUMENTATION: Update overview.txt in Doc/driver-model.
A few grammatical fixes, clarifications and corrections in just the
overview file for the driver model documentation.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-06-07 10:04:21 -07:00
Wanlong Gao 63dc355a5a driver core: remove the driver-model structures from the documentation
Remove the struct bus_type, class, device, device_driver from the
driver-model docs. With another patch add them to device.h, since
they are out of date. That will keep things up to date and provide
a better way to document this stuff.

Signed-off-by: Wanlong Gao <wanlong.gao@gmail.com>
Acked-by: Harry Wei <harryxiyou@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-06 18:01:05 -07:00
Brandon Philips b17cd8d69a driver core: prune docs about device_interface
drivers/base/intf.c was removed before the beginning of (git) time but
its Documentation stuck around.  Remove it.

Signed-off-by: Brandon Philips <brandon@ifup.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-10 16:57:11 -08:00
Stefan Weil 947af29435 Fix spelling of 'platform' in comments and doc
Replace platfrom -> platform.

This is a frequent spelling bug.

Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-02-05 12:22:34 +01:00
Phil Carmody 099c2f21d8 Driver core: driver_attribute parameters can often be const*
Many struct driver_attribute descriptors are purely read-only
structures, and there's no need to change them. Therefore make
the promise not to, which will let those descriptors be put in
a ro section.

Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-23 11:23:43 -08:00
vibi sreenivasan 909662e1e7 driver model: fix show/store prototypes in doc.
FIX prototypes for show & store method in struct driver_attribute

Signed-off-by: vibi sreenivasan <vibi_sreenivasan@cms.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-12 13:02:10 -07:00
Grant Likely b22813b373 Driver Core: Warn driver authors about adding device attributes
Add a blurb to the driver-model documentation about how (not) to add
extra attributes to a struct device at driver probe time.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-15 21:30:23 -07:00
Matt LaPlante 19f5946001 trivial: Miscellaneous documentation typo fixes
Fix various typos in documentation txts.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-06-12 18:01:47 +02:00
Magnus Damm 13977091a9 Driver Core: early platform driver
V3 of the early platform driver implementation.

Platform drivers are great for embedded platforms because we can separate
driver configuration from the actual driver.  So base addresses,
interrupts and other configuration can be kept with the processor or board
code, and the platform driver can be reused by many different platforms.

For early devices we have nothing today.  For instance, to configure early
timers and early serial ports we cannot use platform devices.  This
because the setup order during boot.  Timers are needed before the
platform driver core code is available.  The same goes for early printk
support.  Early in this case means before initcalls.

These early drivers today have their configuration either hard coded or
they receive it using some special configuration method.  This is working
quite well, but if we want to support both regular kernel modules and
early devices then we need to have two ways of configuring the same
driver.  A single way would be better.

The early platform driver patch is basically a set of functions that allow
drivers to register themselves and architecture code to locate them and
probe.  Registration happens through early_param().  The time for the
probe is decided by the architecture code.

See Documentation/driver-model/platform.txt for more details.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Tejun Heo <htejun@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-16 16:17:10 -07:00
Mike Murphy 245127dbe9 PATCH [1/2] Documentation/driver-model/device.txt: fix struct device_attribute
Fix the presented definition of struct device_attribute to match the
actual definition in include/linux/device.h

Signed-off-by: Mike Murphy <mamurph[at]cs.clemson.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-02-22 09:27:15 -08:00
Stephen Rothwell 44414e14af Driver core: Update some prototypes in platform.txt
Just make these match the actual code.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-02 15:14:49 -08:00
Matt LaPlante 01dd2fbf0d typo fixes
Most of these fixes were already submitted for old kernel versions, and were
approved, but for some reason they never made it into the releases.

Because this is a consolidation of a couple old missed patches, it touches both
Kconfigs and documentation texts.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
2007-10-20 01:34:40 +02:00
Brandon Philips 2c19c49a59 Documentation fix devres.txt: lib/iomap.c -> lib/devres.c
Signed-off-by: Brandon Philips <bphilips@suse.de>
Acked-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-18 15:49:49 -07:00
David Brownell adfdebceac update Documentation/driver-model/platform.txt
Make note of the legacy "probe-the-hardware" drivers, and some APIs that
are mostly unused except by such drivers.  We probably can't escape having
legacy drivers for a while (e.g.  old ISA drivers), but we can at least
discourage this style code for new drivers, and unless it's unavoidable.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Andres Salomon <dilinger@debian.org>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-06-08 12:41:07 -07:00
Matt LaPlante a982ac06b0 misc doc and kconfig typos
Fix various typos in kernel docs and Kconfigs, 2.6.21-rc4.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2007-05-09 08:58:15 +02:00
Michael Opdenacker 59c51591a0 Fix occurrences of "the the "
Signed-off-by: Michael Opdenacker <michael@free-electrons.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2007-05-09 08:57:56 +02:00
Rolf Eike Beer 3265b54556 DOC: Fix wrong identifier name in Documentation/driver-model/devres.txt
Above and below we talk about my_midlayer_create_something, I assume that is
also meant here.

Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-05-02 18:57:59 -07:00
Erik Hovland be7d2f775c trivial documentation patch for platform.txt
Found a couple of typos in the Documentation/driver-model/platform.txt
file. This patch fixes both of them.

Signed-off-by: Erik Hovland <erik@hovland.org>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2007-02-17 19:29:21 +01:00
Tejun Heo 9ac7849e35 devres: device resource management
Implement device resource management, in short, devres.  A device
driver can allocate arbirary size of devres data which is associated
with a release function.  On driver detach, release function is
invoked on the devres data, then, devres data is freed.

devreses are typed by associated release functions.  Some devreses are
better represented by single instance of the type while others need
multiple instances sharing the same release function.  Both usages are
supported.

devreses can be grouped using devres group such that a device driver
can easily release acquired resources halfway through initialization
or selectively release resources (e.g. resources for port 1 out of 4
ports).

This patch adds devres core including documentation and the following
managed interfaces.

* alloc/free	: devm_kzalloc(), devm_kzfree()
* IO region	: devm_request_region(), devm_release_region()
* IRQ		: devm_request_irq(), devm_free_irq()
* DMA		: dmam_alloc_coherent(), dmam_free_coherent(),
		  dmam_declare_coherent_memory(), dmam_pool_create(),
		  dmam_pool_destroy()
* PCI		: pcim_enable_device(), pcim_pin_device(), pci_is_managed()
* iomap		: devm_ioport_map(), devm_ioport_unmap(), devm_ioremap(),
		  devm_ioremap_nocache(), devm_iounmap(), pcim_iomap_table(),
		  pcim_iomap(), pcim_iounmap()

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-09 17:39:36 -05:00
Linus Torvalds 4549df891a Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6: (36 commits)
  Driver core: show drivers in /sys/module/
  Documentation/driver-model/platform.txt update/rewrite
  Driver core: platform_driver_probe(), can save codespace
  driver core: Use klist_remove() in device_move()
  driver core: Introduce device_move(): move a device to a new parent.
  Driver core: make drivers/base/core.c:setup_parent() static
  driver core: Introduce device_find_child().
  sysfs: sysfs_write_file() writes zero terminated data
  cpu topology: consider sysfs_create_group return value
  Driver core: Call platform_notify_remove later
  ACPI: Change ACPI to use dev_archdata instead of firmware_data
  Driver core: add dev_archdata to struct device
  Driver core: convert sound core to use struct device
  Driver core: change mem class_devices to be real devices
  Driver core: convert fb code to use struct device
  Driver core: convert firmware code to use struct device
  Driver core: convert mmc code to use struct device
  Driver core: convert ppdev code to use struct device
  Driver core: convert PPP code to use struct device
  Driver core: convert cpuid code to use struct device
  ...
2006-12-01 16:41:07 -08:00
David Brownell c957b32406 Documentation/driver-model/platform.txt update/rewrite
This is almost a rewrite of the driver-model/platform.txt documentation;
the previous text was obsolete (for several years), evidently it never
got updated to match the change from being a PC "legacy_bus" to the more
widely used core bus for most embedded systems.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-01 14:52:02 -08:00
Matt LaPlante 5d3f083d8f Fix typos in /Documentation : Misc
This patch fixes typos in various Documentation txts. The patch addresses some
misc words.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-11-30 05:21:10 +01:00
Paolo Ornati 670e9f34ee Documentation: remove duplicated words
Remove many duplicated words under Documentation/ and do other small
cleanups.

Examples:
        "and and" --> "and"
        "in in" --> "in"
        "the the" --> "the"
        "the the" --> "to the"
        ...

Signed-off-by: Paolo Ornati <ornati@fastwebnet.it>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-10-03 22:57:56 +02:00
Matt LaPlante d6bc8ac9e1 Fix typos in Documentation/: 'Q'-'R'
This patch fixes typos in various Documentation txts. The patch addresses
some words starting with the letters 'Q'-'R'.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-10-03 22:54:15 +02:00
Matt LaPlante 2fe0ae78c6 Fix typos in Documentation/: 'H'-'M'
This patch fixes typos in various Documentation txts. The patch addresses
some words starting with the letters 'H'-'M'.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-10-03 22:50:39 +02:00
olecom@mail.ru 2e2d0dcc1b typo fixes
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-26 19:05:40 +02:00
Linas Vepstas ab11f89929 [PATCH] Clean up Documentation/driver-model/overview.txt
Edits to the driver-model documentation for grammar, clarity and content.

These docs haven't been updated in years, and some of the technical content
and discussion has become stale; this patch updates these.  In addition,
some of the language is awkward.  Fix this.

(I'm trying to cleanup the other files in this directory also,
patches for these will come a bit later).

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Acked-by: Patrick Mochel <mochel@digitalimplant.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-02-03 08:31:59 -08:00
Takashi Iwai 1a222bca26 [PATCH] Fix documentation of driver suspend/resume callbacks
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-10-28 09:52:57 -07:00
Russell King 9480e307cd [PATCH] DRIVER MODEL: Get rid of the obsolete tri-level suspend/resume callbacks
In PM v1, all devices were called at SUSPEND_DISABLE level.  Then
all devices were called at SUSPEND_SAVE_STATE level, and finally
SUSPEND_POWER_DOWN level.  However, with PM v2, to maintain
compatibility for platform devices, I arranged for the PM v2
suspend/resume callbacks to call the old PM v1 suspend/resume
callbacks three times with each level in order so that existing
drivers continued to work.

Since this is obsolete infrastructure which is no longer necessary,
we can remove it.  Here's an (untested) patch to do exactly that.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-10-28 09:52:56 -07:00
Erik Hovland 2a7ff1feda [PATCH] changes device to driver in porting.txt
The document porting.txt in Documentation/driver-model says:
When a device is successfully bound to a device

I think it should say:
When a device is successfully bound to a driver

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-10-28 09:52:50 -07:00
David Brownell 4109aca06c [PATCH] Driver Core: driver model doc update
This updates some driver data documentation:

 - removes references to some fields that haven't been there for a
   long time now, e.g. pre-kobject or even older;

 - giving more information about the probe() method;

 - adding an example of how platform_data is used

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-20 15:15:29 -07:00
Pavel Machek 438510f6f0 [PATCH] pm_message_t: more fixes in common and i386
I thought I'm done with fixing u32 vs.  pm_message_t ...  unfortunately
that turned out not to be the case as Russel King pointed out.  Here are
fixes for Documentation and common code (mainly system devices).

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-16 15:25:24 -07:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00