path: root/arch/x86/platform/olpc
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2015-03-13x86/olpc/xo15/sci: Use newly added power_supply_put APIKrzysztof Kozlowski
Replace direct usage of put_device() with new API: power_supply_put(). Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Acked-by: Pavel Machek <pavel@ucw.cz> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Reviewed-by: Sebastian Reichel <sre@kernel.org> Acked-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-13x86/olpc/xo1/sci: Use newly added power_supply_put APIKrzysztof Kozlowski
Replace direct usage of put_device() with new API: power_supply_put(). Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Acked-by: Pavel Machek <pavel@ucw.cz> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Reviewed-by: Sebastian Reichel <sre@kernel.org> Acked-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-13power_supply: Change ownership from driver to coreKrzysztof Kozlowski
Change the ownership of power_supply structure from each driver implementing the class to the power supply core. The patch changes power_supply_register() function thus all drivers implementing power supply class are adjusted. Each driver provides the implementation of power supply. However it should not be the owner of power supply class instance because it is exposed by core to other subsystems with power_supply_get_by_name(). These other subsystems have no knowledge when the driver will unregister the power supply. This leads to several issues when driver is unbound - mostly because user of power supply accesses freed memory. Instead let the core own the instance of struct 'power_supply'. Other users of this power supply will still access valid memory because it will be freed when device reference count reaches 0. Currently this means "it will leak" but power_supply_put() call in next patches will solve it. This solves invalid memory references in following race condition scenario: Thread 1: charger manager Thread 2: power supply driver, used by charger manager THREAD 1 (charger manager) THREAD 2 (power supply driver) ========================== ============================== psy = power_supply_get_by_name() Driver unbind, .remove power_supply_unregister() Device fully removed psy->get_property() The 'get_property' call is executed in invalid context because the driver was unbound and struct 'power_supply' memory was freed. This could be observed easily with charger manager driver (here compiled with max17040 fuel gauge): $ cat /sys/devices/virtual/power_supply/cm-battery/capacity & $ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind [ 55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 55.732584] pgd = d98d4000 [ 55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000 [ 55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM [ 55.746210] Modules linked in: [ 55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G W 3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496 [ 55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000 [ 55.771647] PC is at 0x0 [ 55.774182] LR is at charger_get_property+0x2f4/0x36c [ 55.779201] pc : [<00000000>] lr : [<c034b0b4>] psr: 60000013 [ 55.779201] sp : daf55e90 ip : 00000003 fp : 00000000 [ 55.790657] r10: 00000000 r9 : c06e2878 r8 : d9b26c68 [ 55.795865] r7 : dad81610 r6 : daec7410 r5 : daf55ebc r4 : 00000000 [ 55.802367] r3 : 00000000 r2 : daf55ebc r1 : 0000002a r0 : d9b26c68 [ 55.808879] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 55.815994] Control: 10c5387d Table: 598d406a DAC: 00000015 [ 55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210) [ 55.827451] Stack: (0xdaf55e90 to 0xdaf56000) [ 55.831795] 5e80: 60000013 c01459c4 0000002a c06f8ef8 [ 55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4 [ 55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80 [ 55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001 [ 55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000 [ 55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000 [ 55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124 [ 55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550 [ 55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364 [ 55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c [ 55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000 [ 55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000 [ 55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c) [ 55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48) [ 55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104) [ 55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28) [ 55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484) [ 55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c) [ 55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100) [ 55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c) [ 55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48) [ 56.000626] Code: bad PC value [ 56.011652] ---[ end trace 7b64343fbdae8ef1 ]--- Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> [for the nvec part] Reviewed-by: Marc Dietrich <marvin24@gmx.de> [for compal-laptop.c] Acked-by: Darren Hart <dvhart@linux.intel.com> [for the mfd part] Acked-by: Lee Jones <lee.jones@linaro.org> [for the hid part] Acked-by: Jiri Kosina <jkosina@suse.cz> [for the acpi part] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2014-10-20x86: platform: olpc: drop owner assignment from platform_driversWolfram Sang
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-05asmlinkage, x86: Add explicit __visible to arch/x86/*Andi Kleen
As requested by Linus add explicit __visible to the asmlinkage users. This marks all functions visible to assembler. Tree sweep for arch/x86/* Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1398984278-29319-3-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-12-07ACPI: Clean up inclusions of ACPI header filesLv Zheng
Replace direct inclusions of <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h>, which are incorrect, with <linux/acpi.h> inclusions and remove some inclusions of those files that aren't necessary. First of all, <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h> should not be included directly from any files that are built for CONFIG_ACPI unset, because that generally leads to build warnings about undefined symbols in !CONFIG_ACPI builds. For CONFIG_ACPI set, <linux/acpi.h> includes those files and for CONFIG_ACPI unset it provides stub ACPI symbols to be used in that case. Second, there are ordering dependencies between those files that always have to be met. Namely, it is required that <acpi/acpi_bus.h> be included prior to <acpi/acpi_drivers.h> so that the acpi_pci_root declarations the latter depends on are always there. And <acpi/acpi.h> which provides basic ACPICA type declarations should always be included prior to any other ACPI headers in CONFIG_ACPI builds. That also is taken care of including <linux/acpi.h> as appropriate. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Tony Luck <tony.luck@intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> (drivers/pci stuff) Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> (Xen stuff) Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-09-24olpc_xo15_sci: convert acpi_evaluate_object() to acpi_execute_simple_method()Zhang Rui
acpi_execute_simple_method() is a new ACPI API introduced to invoke an ACPI control method that has single integer parameter and no return value. Convert acpi_evaluate_object() to acpi_execute_simple_method() in arch/x86/platform/olpc/olpc-xo15-sci.c Signed-off-by: Zhang Rui <rui.zhang@intel.com> CC: Daniel Drake <dsd@laptop.org> CC: H. Peter Anvin <hpa@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-04-24x86/olpc/xo1/sci: Don't call input_free_device() after input_unregister_device()Wei Yongjun
input_free_device() should only be used if input_register_device() was not called yet or if it failed. Once device was unregistered use input_unregister_device() and memory will be freed once last reference to the device is dropped. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: dsd@laptop.org Cc: pgf@laptop.org Cc: gregkh@linuxfoundation.org Link: http://lkml.kernel.org/r/CAPgLHd84cboeucog%2BYNdHvGqTfTROujDKZgSkh3o0B-Q93ee2A@mail.gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-01-26ACPI: Remove useless type argument of driver .remove() operationRafael J. Wysocki
The second argument of ACPI driver .remove() operation is only used by the ACPI processor driver and the value passed to that driver through it is always available from the given struct acpi_device object's removal_type field. For this reason, the second ACPI driver .remove() argument is in fact useless, so drop it. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Jiang Liu <jiang.liu@huawei.com> Acked-by: Toshi Kani <toshi.kani@hp.com> Acked-by: Yinghai Lu <yinghai@kernel.org>
2013-01-03X86: drivers: remove __dev* attributes.Greg Kroah-Hartman
CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitconst, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Daniel Drake <dsd@laptop.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-07-31x86: OLPC: move s/r-related EC cmds to EC driverAndres Salomon
The new EC driver calls platform-specific suspend and resume hooks; run XO-1-specific EC commands from there, rather than deep in s/r code. If we attempt to run EC commands after the new EC driver has suspended, it is refused by the ec->suspended checks. Signed-off-by: Andres Salomon <dilinger@queued.net> Acked-by: Paul Fox <pgf@laptop.org> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
2012-07-31Platform: OLPC: move debugfs support from x86 EC driverAndres Salomon
There's nothing about the debugfs interface for the EC driver that is architecture-specific, so move it into the arch-independent driver. The code is mostly unchanged with the exception of renamed variables, coding style changes, and API updates. Signed-off-by: Andres Salomon <dilinger@queued.net> Acked-by: Paul Fox <pgf@laptop.org> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
2012-07-31x86: OLPC: switch over to using new EC driver on x86Andres Salomon
This uses the new EC driver framework in drivers/platform/olpc. The XO-1 and XO-1.5-specific code is still in arch/x86, but the generic stuff (including a new workqueue; no more running EC commands with IRQs disabled!) can be shared with other architectures. Signed-off-by: Andres Salomon <dilinger@queued.net> Acked-by: Paul Fox <pgf@laptop.org> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
2012-07-31drivers: OLPC: update various drivers to include olpc-ec.hAndres Salomon
Switch over to using olpc-ec.h in multiple steps, so as not to break builds. This covers every driver that calls olpc_ec_cmd(). Signed-off-by: Andres Salomon <dilinger@queued.net> Acked-by: Paul Fox <pgf@laptop.org> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
2012-07-31Platform: OLPC: add a stub to drivers/platform/ for the OLPC EC driverAndres Salomon
The OLPC EC driver has outgrown arch/x86/platform/. It's time to both share common code amongst different architectures, as well as move it out of arch/x86/. The XO-1.75 is ARM-based, and the EC driver shares a lot of code with the x86 code. Signed-off-by: Andres Salomon <dilinger@queued.net> Acked-by: Paul Fox <pgf@laptop.org> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
2012-07-12olpc-xo15-sci: Use struct dev_pm_ops for power managementRafael J. Wysocki
Make the OLPC XO15 SCI driver define its resume callback through a struct dev_pm_ops object rather than by using a legacy PM hook in struct acpi_device_ops. Reported-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Randy Dunlap <rdunlap@xenotime.net>
2012-05-07x86/olpc/xo1/sci: Report RTC wakeup eventsDaniel Drake
When the system is woken due to a RTC event, report the wakeup event on the relevant rtc device (if it can be found). Signed-off-by: Daniel Drake <dsd@laptop.org> Cc: dilinger@queued.net Cc: pgf@laptop.org Link: http://lkml.kernel.org/r/20120418223402.D73249D401E@zog.reactivated.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-05-07x86/olpc/xo1/sci: Produce wakeup events for buttons and switchesDaniel Drake
Produce wakeup events for the XO-1's power button, lid switch and ebook switch, taking care to only produce events when the states have changed. Signed-off-by: Daniel Drake <dsd@laptop.org> Cc: dilinger@queued.net Cc: pgf@laptop.org Link: http://lkml.kernel.org/r/20120412171824.D14C49D401E@zog.reactivated.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-03-27x86/olpc: Add debugfs interface for EC commandsDaniel Drake
Add a debugfs interface for sending commands to the OLPC Embedded Controller (EC) and reading the responses. The EC provides functionality for machine identification, battery and AC control, wakeup control, etc. Having a debugfs interface available is useful for EC development and debugging. Based on code by Paul Fox (who also approves of the end result). Signed-off-by: Daniel Drake <dsd@laptop.org> Acked-by: Paul Fox <pgf@laptop.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andres Salomon <dilinger@queued.net> Link: http://lkml.kernel.org/r/20120327150740.667D09D401E@zog.reactivated.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-03-06x86/olpc/xo15/sci: Enable lid close wakeup controlDaniel Drake
Like most systems, OLPC's ACPI LID switch wakes up the system when the lid is opened, but not when it is closed. Under OLPC's opportunistic suspend model, the lid may be closed while the system was oportunistically suspended with the screen running. In this event, we want to wake up to turn the screen off. Enable control of normal ACPI wakeups through lid close events through a new sysfs attribute "lid_wake_on_closed". When set, and when LID wakeups are enabled through ACPI, the system will wake up on both open and close lid events. Signed-off-by: Daniel Drake <dsd@laptop.org> Cc: Andres Salomon <dilinger@queued.net> Cc: Matthew Garrett <mjg@redhat.com> [ Fixed sscanf checking] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/n/tip-bgt8hxu2wwe0x5p8edhogtf7@git.kernel.org [ Did very minor readability tweaks ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-10-31x86: Fix files explicitly requiring export.h for EXPORT_SYMBOL/THIS_MODULEPaul Gortmaker
These files were implicitly getting EXPORT_SYMBOL via device.h which was including module.h, but that will be fixed up shortly. By fixing these now, we can avoid seeing things like: arch/x86/kernel/rtc.c:29: warning: type defaults to ‘int’ in declaration of ‘EXPORT_SYMBOL’ arch/x86/kernel/pci-dma.c:20: warning: type defaults to ‘int’ in declaration of ‘EXPORT_SYMBOL’ arch/x86/kernel/e820.c:69: warning: type defaults to ‘int’ in declaration of ‘EXPORT_SYMBOL_GPL’ [ with input from Randy Dunlap <rdunlap@xenotime.net> and also from Stephen Rothwell <sfr@canb.auug.org.au> ] Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-08-05x86, olpc: Wait for last byte of EC command to be acceptedPaul Fox
When executing EC commands, only waiting when there are still more bytes to write is usually fine. However, if the system suspends very quickly after a call to olpc_ec_cmd(), the last data byte may not yet be transferred to the EC, and the command will not complete. This solves a bug where the SCI wakeup mask was not correctly written when going into suspend. It means that sometimes, on XO-1.5 (but not XO-1), the devices that were marked as wakeup sources can't wake up the system. e.g. you ask for wifi wakeups, suspend, but then incoming wifi frames don't wake up the system as they should. Signed-off-by: Paul Fox <pgf@laptop.org> Signed-off-by: Daniel Drake <dsd@laptop.org> Acked-by: Andres Salomon <dilinger@queued.net> Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-07-24x86, olpc-xo15-sci: Enable EC wakeup capabilityDaniel Drake
Some recent changes to the way that ACPI handles wakeup flags means that the XO15EC ACPI device is not wakeup-capable by default so device_set_wakeup_enable() does nothing. Use device_init_wakeup() to mark the device as wakeup capable, and to enable wakeups. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/20110724173430.BE03C9D401C@zog.reactivated.net Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-07-06x86, olpc: Add XO-1.5 SCI driverDaniel Drake
Add a driver for the ACPI-based EC event interface found on the OLPC XO-1.5 laptop. This enables notification of battery/AC power events, and enables various devices to be used as wakeup sources through regular ACPI mechanisms. This driver can't be built as a module, because some drivers need to know at boot-time if SCI-based functionality is available via olpc_ec_wakeup_available(). Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/1309019658-1712-12-git-send-email-dsd@laptop.org Acked-by: Andres Salomon <dilinger@queued.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-07-06x86, olpc: Add XO-1 RTC driverDaniel Drake
Add a driver to configure the XO-1 RTC via CS5536 MSRs, to be used as a system wakeup source via olpc-xo1-pm. Device detection is based on finding the relevant device tree node. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/1309019658-1712-11-git-send-email-dsd@laptop.org Acked-by: Andres Salomon <dilinger@queued.net> Acked-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: devicetree-discuss@lists.ozlabs.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-07-06x86, olpc-xo1-sci: Propagate power supply/battery eventsDaniel Drake
EC events indicate change in AC power connectivity, battery state of charge, battery error, battery presence, etc. Send notifications to the power supply subsystem when changes are detected. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/1309019658-1712-10-git-send-email-dsd@laptop.org Acked-by: Andres Salomon <dilinger@queued.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-07-06x86, olpc-xo1-sci: Add lid switch functionalityDaniel Drake
Configure the XO-1's lid switch GPIO to trigger an SCI interrupt, and correctly expose this input device which can be used as a wakeup source. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/1309019658-1712-9-git-send-email-dsd@laptop.org Acked-by: Andres Salomon <dilinger@queued.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-07-06x86, olpc-xo1-sci: Add GPE handler and ebook switch functionalityDaniel Drake
The EC in the OLPC XO-1 delivers GPE events to provide various notifications. Add the basic code for GPE/EC event processing and enable the ebook switch, which can be used as a wakeup source. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/1309019658-1712-8-git-send-email-dsd@laptop.org Acked-by: Andres Salomon <dilinger@queued.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-07-06x86, olpc: EC SCI wakeup mask functionalityDaniel Drake
Update the EC SCI masks with recent additions. Add functions to query SCI events and set the wakeup mask, to be used by followup patches. Add functions to tweak an event mask used to select certain EC events as a system wakeup source. Also add a function to determine if EC wakeup functionality is available, as this depends on child drivers (different for each laptop model) to configure the SCI interrupt. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/1309019658-1712-7-git-send-email-dsd@laptop.org Acked-by: Andres Salomon <dilinger@queued.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-07-06x86, olpc: Add XO-1 SCI driver and power button controlDaniel Drake
The System Control Interrupt is used in the OLPC XO-1 to control various features of the laptop. Add the driver base and the power button functionality. This driver can't be built as a module, because functionality added in future patches means that some drivers need to know at boot-time whether SCI-based functionality is available. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/1309019658-1712-6-git-send-email-dsd@laptop.org Acked-by: Andres Salomon <dilinger@queued.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-07-06x86, olpc: Add XO-1 suspend/resume supportDaniel Drake
Add code needed for basic suspend/resume of the XO-1 laptop. Based on earlier work by Jordan Crouse, Andres Salomon, and others. This patch incorporates all earlier feedback from Thomas Gleixner. To clarify a certain point (now more obvious in the code itself): On resume, OpenFirmware returns execution to Linux in protected mode with a kernel-compatible GDT already set up. The changes and simplifications suggested have all been included. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/1309019658-1712-5-git-send-email-dsd@laptop.org Acked-by: Andres Salomon <dilinger@queued.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-07-06x86, olpc: Rename olpc-xo1 to olpc-xo1-pmDaniel Drake
Based on earlier review comments, we'll no longer try to stick all of our XO-1 goodies in a single driver. We'll split it into a power management driver, and an EC/SCI driver. As a first step, rename olpc-xo1 to olpc-xo1-pm, and make it builtin instead of modular. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/1309019658-1712-4-git-send-email-dsd@laptop.org Acked-by: Andres Salomon <dilinger@queued.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-07-06x86, olpc: Move CS5536-related constants to cs5535.hDaniel Drake
Move these definitions into the relevant header file. This was requested in the review of the upcoming XO-1 suspend/resume code. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/1309019658-1712-3-git-send-email-dsd@laptop.org Acked-by: Andres Salomon <dilinger@queued.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-07-06x86, olpc: Add missing elements to device treeDaniel Drake
In response to new device tree code in the kernel, OLPC will start using it for probing of certain devices. However, some firmware fixes are needed to put the devicetree into a usable state. Retain compatibility with old firmware by fixing up the device tree at boot-time if it does not contain the new nodes/properties that we need for probing. This is the same approach taken on PPC platforms. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/1309019658-1712-2-git-send-email-dsd@laptop.org Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Andres Salomon <dilinger@queued.net> Cc: devicetree-discuss@lists.ozlabs.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-05-19Merge branch 'x86-platform-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Introduce pci_map_biosrom() x86, olpc: Use device tree for platform identification
2011-03-27mfd: OLPC: Clean up names to match what OLPC actually usesDaniel Drake
The cs5535-pms cell doesn't actually need to be cloned, so we can drop that and simply have the olpc-xo1.c driver use "cs5535-pms" directly. Also, rename the cs5535-acpi clones to what we actually use for the (currently out-of-tree) SCI driver. In the process, that fixes a subtle bug in olpc-xo1.c which broke powerdown on XO-1s.. olpc-xo1-ac-acpi was a typo, not something that actually existed. Signed-off-by: Daniel Drake <dsd@laptop.org> Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-03-27mfd: Add mfd_clone_cell(), convert cs5535-mfd/olpc-xo1 to itAndres Salomon
Replace mfd_shared_platform_driver_register with mfd_clone_cell. The former was called by an mfd client, and registered both a platform driver and device. The latter is called by an mfd driver, and registers only a platform device. The downside of this is that mfd drivers need to be modified whenever new clients are added that share a cell; the upside is that it fits Linux's driver model better. It's also simpler. This also converts cs5535-mfd/olpc-xo1 from the old API. cs5535-mfd now creates the olpc-xo1-{acpi,pms} devices, while olpc-xo1 binds to them via platform drivers. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-03-23mfd: Rename mfd_shared_cell_{en,dis}able to drop the "shared" partAndres Salomon
As requested by Samuel, there's not really any reason to have "shared" in the name. This also modifies the only user of the function, as well. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-03-23mfd: Add sharing for cs5535 acpi/pms cellsAndres Salomon
This enables sharing of cs5535-mfd cells via the new mfd_shared_* API. Hooks for enable/disble of resources are added, with refcounting of resources being automatically handled so that cs5535_mfd_res_enable/disable are only called when necessary. Clients of cs5535-mfd (in this case, olpc-xo1.c) are also modified to use the mfd_shared API. The platform drivers are also renamed to olpc-xo1-{pms,acpi}, and resource enabling/disabling is replaced with mfd_shared API calls. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-03-15Merge branch 'x86-platform-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (27 commits) x86: Clean up apic.c and apic.h x86: Remove superflous goal definition of tsc_sync x86: dt: Correct local apic documentation in device tree bindings x86: dt: Cleanup local apic setup x86: dt: Fix OLPC=y/INTEL_CE=n build rtc: cmos: Add OF bindings x86: ce4100: Use OF to setup devices x86: ioapic: Add OF bindings for IO_APIC x86: dtb: Add generic bus probe x86: dtb: Add support for PCI devices backed by dtb nodes x86: dtb: Add device tree support for HPET x86: dtb: Add early parsing of IO_APIC x86: dtb: Add irq domain abstraction x86: dtb: Add a device tree for CE4100 x86: Add device tree support x86: e820: Remove conditional early mapping in parse_e820_ext x86: OLPC: Make OLPC=n build again x86: OLPC: Remove extra OLPC_OPENFIRMWARE_DT indirection x86: OLPC: Cleanup config maze completely x86: OLPC: Hide OLPC_OPENFIRMWARE config switch ... Fix up conflicts in arch/x86/platform/ce4100/ce4100.c
2011-03-15x86, olpc: Use device tree for platform identificationDaniel Drake
Make OLPC fully depend on device tree, and use it to identify the OLPC platform details. Some nodes are exposed as platform devices where we plan to use device tree for device probing. Signed-off-by: Daniel Drake <dsd@laptop.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> LKML-Reference: <20110313151017.C255F9D401E@zog.reactivated.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-03-02x86: OLPC: have prom_early_alloc BUG rather than return NULLAndres Salomon
..similar to what sparc's prom_early_alloc does. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-23x86: OLPC: Remove extra OLPC_OPENFIRMWARE_DT indirectionThomas Gleixner
OLPC_OPENFIRMWARE_DT is just there to be selected by OLPC and selects OF_PROMTREE. So let OLPC select OF_PROMTREE and remove that extra config indirection. Fixup code and Makefile and use CONFIG_OF_PROMTREE instead. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andres Salomon <dilinger@queued.net>
2011-02-23x86: OLPC: Cleanup config maze completelyThomas Gleixner
Neither CONFIG_OLPC_OPENFIRMWARE nor CONFIG_OLPC_OPENFIRMWARE_DT are really necessary. OLPC selects OLPC_OPENFIRMWARE unconditionally, so move the "select OF" part under OLPC config option and fixup the dependencies in Makefiles and code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andres Salomon <dilinger@queued.net>
2011-01-14x86: OLPC: convert olpc-xo1 driver from pci device to platform deviceAndres Salomon
The cs5535-mfd driver now takes care of the PCI BAR handling; this means the olpc-xo1 driver shouldn't be touching the PCI device at all. This patch uses both cs5535-acpi and cs5535-pms platform devices rather than a single platform device because the cs5535-mfd driver may be used by other CS5535 platform-specific drivers; OLPC doesn't get to dictate that ACPI and PMS will always be used together. Signed-off-by: Andres Salomon <dilinger@queued.net> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-12-15x86, olpc: Speed up device tree creation during bootAndres Salomon
Calling alloc_bootmem() for tiny chunks of memory over and over is really slow; on an XO-1, it caused the time between when the kernel started booting and when the display came alive (post-lxfb probe) to increase to 44s. This patch optimizes the prom_early_alloc function by calling alloc_bootmem for 4k-sized blocks of memory, and handing out chunks of that to callers. With this patch, the time between kernel load and display initialization decreased to 23s. If there's a better way to do this early in the boot process, please let me know. (Note: increasing the chunk size to 16k didn't noticably affect boot time, and wasted 9k.) v4: clarify comment, requested by hpa v3: fix wasted memory buglet found by Milton Miller, and style fix. v2: reorder prom_early_alloc as suggested by Grant. Signed-off-by: Andres Salomon <dilinger@queued.net> LKML-Reference: <20101129153951.74202a84@queued.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2010-12-15x86, olpc: Add OLPC device-tree supportAndres Salomon
Make use of PROC_DEVICETREE to export the tree, and sparc's PROMTREE code to call into OLPC's Open Firmware to build the tree. v5: fix buglet with root node check (introduced in v4) v4: address some minor style issues pointed out by Grant, and explicitly cast negative phandle checks to s32. v3: rename olpc_prom to olpc_dt - rework Kconfig entries - drop devtree build hook from proc, instead adding a call to x86's paging_init (similarly to how sparc64 does it) - switch allocation from using slab to alloc_bootmem. this allows the DT to be built earlier during boot (during setup_arch); the downside is that there are some 1200 bootmem reservations that are done during boot. Not ideal.. - add a helper olpc_ofw_is_installed function to test for the existence and successful detection of OLPC's OFW. Signed-off-by: Andres Salomon <dilinger@queued.net> LKML-Reference: <20101116220952.26526a80@queued.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2010-10-27x86: Move olpc to platformThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andres Salomon <dilinger@queued.net>