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path: root/drivers/rtc/rtc-imxdi.c
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* sched/wait: Disambiguate wq_entry->task_list and wq_head->task_list namingIngo Molnar2017-06-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | So I've noticed a number of instances where it was not obvious from the code whether ->task_list was for a wait-queue head or a wait-queue entry. Furthermore, there's a number of wait-queue users where the lists are not for 'tasks' but other entities (poll tables, etc.), in which case the 'task_list' name is actively confusing. To clear this all up, name the wait-queue head and entry list structure fields unambiguously: struct wait_queue_head::task_list => ::head struct wait_queue_entry::task_list => ::entry For example, this code: rqw->wait.task_list.next != &wait->task_list ... is was pretty unclear (to me) what it's doing, while now it's written this way: rqw->wait.head.next != &wait->entry ... which makes it pretty clear that we are iterating a list until we see the head. Other examples are: list_for_each_entry_safe(pos, next, &x->task_list, task_list) { list_for_each_entry(wq, &fence->wait.task_list, task_list) { ... where it's unclear (to me) what we are iterating, and during review it's hard to tell whether it's trying to walk a wait-queue entry (which would be a bug), while now it's written as: list_for_each_entry_safe(pos, next, &x->head, entry) { list_for_each_entry(wq, &fence->wait.head, entry) { Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
* rtc: constify rtc_class_ops structuresBhumika Goyal2017-01-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Declare rtc_class_ops structures as const as they are only passed as an argument to the function devm_rtc_device_register. This argument is of type const struct rtc_class_ops *, so rtc_class_ops structures having this property can be declared const. Done using Coccinelle: @r1 disable optional_qualifier @ identifier i; position p; @@ static struct rtc_class_ops i@p = {...}; @ok1@ identifier r1.i; position p; @@ devm_rtc_device_register(...,&i@p,...) @bad@ position p!={r1.p,ok1.p}; identifier r1.i; @@ i@p @depends on !bad disable optional_qualifier@ identifier r1.i; @@ +const struct rtc_class_ops i; Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: imxdi: use the security violation interruptMartin Kaiser2017-01-111-9/+22
| | | | | | | | | | | | | | | | The DryIce chipset has a dedicated security violation interrupt that is triggered for security violations (if configured to do so). According to the publicly available imx258 reference manual, irq 56 is used for this interrupt. If an irq number is provided for the security violation interrupt, install the same handler that we're already using for the "normal" interrupt. imxdi->irq is used only in the probe function, make it a local variable. Signed-off-by: Martin Kaiser <martin@kaiser.cx> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: imxdi: (trivial) fix a typoMartin Kaiser2016-12-071-1/+1
| | | | | | | Fix a typo Signed-off-by: Martin Kaiser <martin@kaiser.cx> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: imxdi: fix spelling mistake in warning messageColin Ian King2016-01-111-1/+1
| | | | | | | Minor issue, fix spelling mistake, happend -> happened Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: imxdi: when locked, do not fail silentlyJuergen Borleis2015-06-191-3/+24
| | | | | | | | | | If the DryICE unit is locked it is impossible to set the time. Provide an error message for this case. Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Signed-off-by: Robert Schwebel <rsc@pengutronix.de> [rsc: got NDA clearance from Freescale] Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: imxdi: monitor a security violation at runtimeJuergen Borleis2015-06-191-2/+19
| | | | | | | | | | Maybe the unit enters the hardware related state at runtime and not at system boot time (after a power cycle). Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Signed-off-by: Robert Schwebel <rsc@pengutronix.de> [rsc: got NDA clearance from Freescale] Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: imxdi: add the unit recovery codeJuergen Borleis2015-06-191-38/+279
| | | | | | | | | | | This code is required to recover the unit from a security violation. Hopefully this code can recover the unit from a hardware related invalid state as well. Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Signed-off-by: Robert Schwebel <rsc@pengutronix.de> [rsc: got NDA clearance from Freescale] Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: imxdi: add some background info about the states the machine can be inJuergen Borleis2015-06-191-0/+43
| | | | | | | | | Document the i.MX DryIce machine states. Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Signed-off-by: Robert Schwebel <rsc@pengutronix.de> [rsc: got NDA clearance from Freescale] Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* rtc: imxdi: avoid the __raw* register access functionsJuergen Borleis2015-06-191-22/+22
| | | | | | | Be independent of the endianness of the kernel. Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* drivers/rtc/rtc-imxdi.c: add more known register bitsJuergen Borleis2015-02-131-4/+40
| | | | | | | | | | | | Intended for monitoring and controlling the security features. These bits are required to bring this unit back to live after a security violation event was detected. The code to bring it back to live will follow after a vendor clearance. Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-imxdi.c: trivial clean up codeJuergen Borleis2015-02-131-3/+3
| | | | | | | Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: drop owner assignment from platform_driversWolfram Sang2014-10-201-1/+0
| | | | | | | 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>
* drivers/rtc/rtc-imxdi.c: check the return value from clk_prepare_enable()Fabio Estevam2014-04-031-1/+3
| | | | | | | | | clk_prepare_enable() may fail, so let's check its return value and propagate it in the case of error. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: simplify devm_request_mem_region/devm_ioremapJulia Lawall2013-09-111-12/+4
| | | | | | | | | | | | | | | | | | | | Convert the composition of devm_request_mem_region and devm_ioremap to a single call to devm_ioremap_resource. The associated call to platform_get_resource is also simplified and moved next to the new call to devm_ioremap_resource. This was done using a combination of the semantic patches devm_ioremap_resource.cocci and devm_request_and_ioremap.cocci, found in the scripts/coccinelle/api directory. In rtc-lpc32xx.c and rtc-mv.c, the local variable size is no longer needed. In rtc-ds1511.c the size field of the local structure is not useful any more, and is deleted. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: rtc-imxdi: use devm_rtc_device_register()Jingoo Han2013-04-291-3/+1
| | | | | | | | | devm_rtc_device_register() is device managed and makes cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: rtc-imxdi: use module_platform_driver_probe()Jingoo Han2013-04-291-12/+1
| | | | | | | | | Use module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: rtc-imxdi: add __init/__exit annotationJingoo Han2013-04-291-3/+3
| | | | | | | | | When platform_driver_probe() is used, bind/unbind via sysfs is disabled. Thus, __init/__exit annotations can be added to probe()/remove(). Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: rtc-imxdi: use devm_clk_get()Jingoo Han2013-02-211-3/+1
| | | | | | | | Use devm_clk_get() to make cleanup paths more simple. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Drivers: rtc: remove __dev* attributes.Greg Kroah-Hartman2013-01-031-2/+2
| | | | | | | | | | | | | | | | | | | | | 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, __devinitdata, __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: Alessandro Zummo <a.zummo@towertech.it> Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Mike Frysinger <vapier.adi@gmail.com> Cc: Wan ZongShun <mcuos.com@gmail.com> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers/rtc/rtc-imxdi.c: must include <linux/spinlock.h>Jean Delvare2012-12-201-0/+1
| | | | | | | | | | Add the missing header include for spinlocks, to avoid potential build failures on specific architectures or configurations. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-imxdi.c: add devicetree supportRoland Stigge2012-12-171-0/+11
| | | | | | | | | | | | | Add device tree support to the rtc-imxdi driver. Signed-off-by: Roland Stigge <stigge@antcom.de> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Russell King <linux@arm.linux.org.uk> Cc: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-imxdi.c: add missing spin lock initializationJan Luebbe2012-10-251-0/+2
| | | | | | | | | | | | | Signed-off-by: Jan Luebbe <jlu@pengutronix.de> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Roland Stigge <stigge@antcom.de> Cc: Grant Likely <grant.likely@secretlab.ca> Tested-by: Roland Stigge <stigge@antcom.de> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Russell King <linux@arm.linux.org.uk> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: imx dryice: Add missing clk_prepareSascha Hauer2012-04-251-3/+3
| | | | | | prepare the clock before enabling it. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* drivers/rtc/rtc-imxdi.c needs linux/sched.hAxel Lin2011-09-141-0/+1
| | | | | | | | | | | | | | | | | | | | | Include linux/sched.h to fix below build error. CC drivers/rtc/rtc-imxdi.o drivers/rtc/rtc-imxdi.c: In function 'di_write_wait': drivers/rtc/rtc-imxdi.c:168: error: 'TASK_INTERRUPTIBLE' undeclared (first use in this function) drivers/rtc/rtc-imxdi.c:168: error: (Each undeclared identifier is reported only once drivers/rtc/rtc-imxdi.c:168: error: for each function it appears in.) drivers/rtc/rtc-imxdi.c:168: error: implicit declaration of function 'signal_pending' drivers/rtc/rtc-imxdi.c:168: error: implicit declaration of function 'schedule_timeout' drivers/rtc/rtc-imxdi.c: In function 'dryice_norm_irq': drivers/rtc/rtc-imxdi.c:329: error: 'TASK_INTERRUPTIBLE' undeclared (first use in this function) Signed-off-by: Axel Lin <axel.lin@gmail.com> Cc: Baruch Siach <baruch@tkos.co.il> Cc: Wan ZongShun <mcuos.com@gmail.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: driver for the DryIce block found in i.MX25 chipsBaruch Siach2010-08-111-0/+519
This driver is based on code from Freescale which accompanies their i.MX25 PDK board, with some cleanup. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Sascha Hauer <kernel@pengutronix.de> Acked-by: Wan ZongShun <mcuos.com@gmail.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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