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* ARM: 7366/3: amba: Remove AMBA level regulator supportMark Brown2012-04-131-41/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | The AMBA bus regulator support is being used to model on/off switches for power domains which isn't terribly idiomatic for modern kernels with the generic power domain code and creates integration problems on platforms which don't use regulators for their power domains as it's hard to tell the difference between a regulator that is needed but failed to be provided and one that isn't supposed to be there (though DT does make that easier). Platforms that wish to use the regulator API to manage their power domains can indirect via the power domain interface. This feature is only used with the vape supply of the db8500 PRCMU driver which supplies the UARTs and MMC controllers, none of which have support for managing vcore at runtime in mainline (only pl022 SPI controller does). Update that supply to have an always_on constraint until the power domain support for the system is updated so that it is enabled for these users, this is likely to have no impact on practical systems as probably at least one of these devices will be active and cause AMBA to hold the supply on anyway. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* ARM: amba: make use of -1 IRQs warnRussell King2012-01-251-0/+3
| | | | | | Make the core warn about the use of -1 (NO_IRQ) Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* ARM: amba: make irq 0 invalidRussell King2012-01-251-2/+2
| | | | | | | Fix core bus and MMCI such that irq 0 means that there is no IRQ attached. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* ARM: amba: add amba_device allocation/add/put functionsRussell King2012-01-251-25/+75
| | | | | | | | Add functions to allocate and initialize AMBA device structures, and add them to the Linux device manager. This allows us to kill this type of operation from individual platforms, moving it to core code. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* Merge branch 'pm-for-linus' of ↵Linus Torvalds2012-01-081-135/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm * 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (76 commits) PM / Hibernate: Implement compat_ioctl for /dev/snapshot PM / Freezer: fix return value of freezable_schedule_timeout_killable() PM / shmobile: Allow the A4R domain to be turned off at run time PM / input / touchscreen: Make st1232 use device PM QoS constraints PM / QoS: Introduce dev_pm_qos_add_ancestor_request() PM / shmobile: Remove the stay_on flag from SH7372's PM domains PM / shmobile: Don't include SH7372's INTCS in syscore suspend/resume PM / shmobile: Add support for the sh7372 A4S power domain / sleep mode PM: Drop generic_subsys_pm_ops PM / Sleep: Remove forward-only callbacks from AMBA bus type PM / Sleep: Remove forward-only callbacks from platform bus type PM: Run the driver callback directly if the subsystem one is not there PM / Sleep: Make pm_op() and pm_noirq_op() return callback pointers PM/Devfreq: Add Exynos4-bus device DVFS driver for Exynos4210/4212/4412. PM / Sleep: Merge internal functions in generic_ops.c PM / Sleep: Simplify generic system suspend callbacks PM / Hibernate: Remove deprecated hibernation snapshot ioctls PM / Sleep: Fix freezer failures due to racy usermodehelper_is_disabled() ARM: S3C64XX: Implement basic power domain support PM / shmobile: Use common always on power domain governor ... Fix up trivial conflict in fs/xfs/xfs_buf.c due to removal of unused XBT_FORCE_SLEEP bit
| * PM / Sleep: Remove forward-only callbacks from AMBA bus typeRafael J. Wysocki2011-12-211-135/+1
| | | | | | | | | | | | | | | | | | The forward-only PM callbacks provided by the AMBA bus type are not necessary any more, because the PM core executes driver callbacks when the corresponding subsystem callbacks are not present, so drop them. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
* | ARM: amba: Auto-generate AMBA driver module aliases during modpostDave Martin2011-11-221-0/+4
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds the necessary support in file2alias.c to define suitable aliases based on the amba_id table in AMBA driver modules. This should be sufficient to allow such modules to be auto-loaded via udev. The AMBA bus driver's uevent hotplug code is also modified to pass an approriate MODALIAS string in the event. For simplicity, the AMBA ID is treated an an opaque 32-bit numeber. Module alises use patterns as appropriate to describe the value- mask pairs described in the driver's amba_id list. The proposed alias format is (extended regex): ^amba:d(HEX){8}$ Where HEX is a single upper-case HEX digit or a pattern (? or [] expression) matching a single upper-case HEX digit, as expected by udev. "d" is short for "device", following existing alias naming conventions for other device types. This adds some flexibility for unambiguously extending the alias format in the future by adding additional leading and trailing fields, if this turns out to be necessary. Signed-off-by: Dave Martin <dave.martin@linaro.org> Acked-by: Pawel Moll <pawel.moll@arm.com>
* clk: amba bus: convert to clk_prepare()/clk_unprepare()Russell King2011-09-271-1/+10
| | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* PM: add runtime PM support to core Primecell driverRussell King2011-09-221-3/+54
| | | | | | | | | | | | | | | | | Add runtime PM support to the core Primecell driver, following the PCI model of how this is done. Rather than having every driver fiddle about with enabling runtime PM, that's dealt with in the core and instead, drivers just do a put() in their probe and a balancing get() in their remove function to activate runtime PM for the device. As we're dealing with enabling runtime PM in the core, fix up spi-pl022 as it must not enable and disable runtime PM itself anymore. Tested-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* ARM: 6829/1: amba: make hardcoded periphid override hardwareLinus Walleij2011-05-261-0/+5
| | | | | | | | | | | | This makes a hardcoded periphid from the platform override any magic number found in the hardware. This shall henceforth be used when the information found in the hardware is either missing, i.e. not encoding the CID with the magic cookie 0xb105f00d, or incorrect such that the revision number should have been bumped in hardware, but the silicon designer has failed to do so. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* PM / Hibernate: Introduce CONFIG_HIBERNATE_CALLBACKSRafael J. Wysocki2011-04-111-3/+3
| | | | | | | | | | | | | | | | | | | | | Xen save/restore is going to use hibernate device callbacks for quiescing devices and putting them back to normal operations and it would need to select CONFIG_HIBERNATION for this purpose. However, that also would cause the hibernate interfaces for user space to be enabled, which might confuse user space, because the Xen kernels don't support hibernation. Moreover, it would be wasteful, as it would make the Xen kernels include a substantial amount of code that they would never use. To address this issue introduce new power management Kconfig option CONFIG_HIBERNATE_CALLBACKS, such that it will only select the code that is necessary for the hibernate device callbacks to work and make CONFIG_HIBERNATION select it. Then, Xen save/restore will be able to select CONFIG_HIBERNATE_CALLBACKS without dragging the entire hibernate code along with it. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Tested-by: Shriram Rajagopalan <rshriram@cs.ubc.ca>
* Fix common misspellingsLucas De Marchi2011-03-311-1/+1
| | | | | | Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
* ARM: 6758/1: amba: support pm opsRabin Vincent2011-02-231-23/+317
| | | | | | | | | | | Support pm_ops in the AMBA bus, required to allow drivers to use runtime pm. The implementation of AMBA bus pm ops is based on the platform bus implementation. Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* ARM: amba: make internal ID table handling constRussell King2011-02-231-3/+3
| | | | | | | As all probe() functions now take a const pointer, we can make the bus level code deal with const pointers too. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* ARM: 6662/1: amba: make amba_bustype non-staticRob Herring2011-02-231-1/+1
| | | | | | | | Export amba_bustype struct so it can be used for things like registering bus notifiers. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* ARM: 6467/1: amba: optional PrimeCell core voltage switchLinus Walleij2010-11-261-0/+39
| | | | | | | | | | | | | | | | | | | | | On some contemporary sub-micron SoCs, peripherals on the chip have power domain switches, i.e. the voltage to the core may be turned off to conserve power. In the Ux500 we have this for out PrimeCell derivates. This patch makes it possible to specify an (optional) regulator to handle the voltage domain switch on AMBA PrimeCells, modeled very similar to how block clocks are handled. Additional amba_vcore_[enable|disable] calls are supplied to make it possible introduce optional powering off of the core voltage. Using this will require code to spool/unspool any core HW state. Cc: Rabin Vincent <rabin.vincent@stericsson.com> Cc: Bengt Jonsson <bengt.g.jonsson@stericsson.com> Cc: Jonas Aaberg <jonas.aberg@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* ARM: 6368/1: move the PrimeCell IDs to use macrosLinus Walleij2010-10-081-1/+1
| | | | | | | | | | This make four macros for the PrimeCell ID register available to drivers that use them witout using the PrimeCell/AMBA bus abstraction and struct amba_device. It also moves the magic PrimeCell CID "B105F00D" to the bus.h header file. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* ARM: AMBA: Add pclk support to AMBA bus infrastructureRussell King2010-07-311-19/+69
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some platforms gate the pclk (APB - the bus - clock) to the peripherals for power saving, along with the functional clock. When devices are accessed without pclk enabled, the kernel will oops. This gives them two options: 1. Leave all clocks on all the time. 2. Attempt to gate pclk along with the functional clock. (With some hardware, pclk and the functional clock are gated by a single bit in a register.) (1) has the disadvantage that it causes increased power usage, which is bad news for battery operated devices. (2) can lead to kernel oops if registers are accessed without the functional clock being enabled. So, introduce the apb_pclk signal in such a way existing drivers don't need to be updated. Essentially, this means we guarantee that: 1. pclk will be enabled whenever the driver is bound to a device - from probe() to remove() time. 2. pclk will also be enabled when reading the primecell IDs from the device. In order to allow drivers to be incrementally updated to achieve greater power savings, we provide two additional calls to allow drivers to manage the pclk - amba_pclk_enable()/amba_pclk_disable(). Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
*-. Merge branches 'arm', 'at91', 'bcmring', 'ep93xx', 'mach-types', 'misc' and ↵Russell King2009-09-121-1/+11
|\ \ | | | | | | | | | 'w90x900' into devel
| | * [ARM] amba: fix amba device resourcesRussell King2009-07-051-1/+11
| |/ | | | | | | | | | | | | | | | | | | | | | | AMBA device resources were being reported as: 10004000-10004fff : <BAD> This is because dev_name() was returning NULL prior to device_register. Ensure that the struct device is properly initialized, and the name is set before adding it to the device tree. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | ARM: 5625/1: fix hard coded 4K resource size in amba bus detectionLeo Chen2009-09-021-5/+21
|/ | | | | | | | | | | | This patch modifies the amba bus detection logic in the kernel to detect the AMBA devices using the calculated resource size information rather than the hard coded 4K size. It also calculates the resource size when request mem region and release mem region. Signed-off-by: Leo Chen <leochen@broadcom.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* amba: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers2009-03-241-2/+2
| | | | | Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
* [ARM] Fix realview buildRussell King2009-01-081-1/+2
| | | | | | | arch/arm/mach-realview/platsmp.c:140: error: 'jiffies' undeclared (first use in this function) drivers/amba/bus.c:246: error: 'NO_IRQ' undeclared (first use in this function) Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* Driver core: change add_uevent_var to use a structKay Sievers2007-10-121-6/+3
| | | | | | | | | | | | | | | | | | This changes the uevent buffer functions to use a struct instead of a long list of parameters. It does no longer require the caller to do the proper buffer termination and size accounting, which is currently wrong in some places. It fixes a known bug where parts of the uevent environment are overwritten because of wrong index calculations. Many thanks to Mathieu Desnoyers for finding bugs and improving the error handling. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* uevent: use add_uevent_var() instead of open coding itEric Rannaud2007-04-271-7/+6
| | | | | | | | | | | | Make use of add_uevent_var() instead of (often incorrectly) open coding it. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Eric Rannaud <eric.rannaud@gmail.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [ARM] Fix __must_check warnings in drivers/bus/amba.cRussell King2006-11-301-48/+65
| | | | | | | Fix driver model __must_check warnings in drivers/bus/amba.c by rearranging how we add attributes to devices. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] 64bit resource: fix up printks for resources in misc driversGreg Kroah-Hartman2006-06-271-2/+3
| | | | | | | | | | This is needed if we wish to change the size of the resource structures. Based on an original patch from Vivek Goyal <vgoyal@in.ibm.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [ARM] Remove asm/irq.h includes from ARM driversRussell King2006-01-091-1/+0
| | | | | | | Many ARM drivers do not need to include asm/irq.h - remove this unnecessary include from some ARM drivers. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] Move AMBA bus code to drivers/amba/Russell King2006-01-072-0/+361
Make the AMBA bus code visible to other architectures. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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