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path: root/drivers/rtc/rtc-tegra.c
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2019-11-27rtc: tegra: remove set but unused variableAlexandre Belloni1-2/+2
Fix the following warning: drivers/rtc/rtc-tegra.c: In function ‘tegra_rtc_read_time’: drivers/rtc/rtc-tegra.c:106:11: warning: variable ‘msec’ set but not used [-Wunused-but-set-variable] Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Jonathan Hunter <jonathanh@nvidia.com> Acked-by: Thierry Reding <treding@nvidia.com> Link: https://lore.kernel.org/r/20191122102212.400158-8-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-10-07rtc: use devm_platform_ioremap_resource() to simplify codeYueHaibing1-3/+1
Use devm_platform_ioremap_resource() to simplify the code a bit. This is detected by coccinelle. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Link: https://lore.kernel.org/r/20191006102953.57536-2-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-3-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-4-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-5-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-6-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-7-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-8-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-9-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-10-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-11-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-12-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-13-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-14-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-15-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-16-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-17-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-18-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-19-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-20-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-21-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-22-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-23-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-24-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-25-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-26-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-27-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-28-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-29-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-30-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-31-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-32-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-33-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-34-yuehaibing@huawei.com Link: https://lore.kernel.org/r/20191006102953.57536-35-yuehaibing@huawei.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-08-21rtc: remove superfluous error messageAlexandre Belloni1-3/+1
The RTC core now has error messages in case of registration failure, there is no need to have other messages in the drivers. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20190818220041.17833-2-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-08-13rtc: Remove dev_err() usage after platform_get_irq()Stephen Boyd1-3/+1
We don't need dev_err() messages when platform_get_irq() fails now that platform_get_irq() prints an error message itself when something goes wrong. Let's remove these prints with a simple semantic patch. // <smpl> @@ expression ret; struct platform_device *E; @@ ret = ( platform_get_irq(E, ...) | platform_get_irq_byname(E, ...) ); if ( \( ret < 0 \| ret <= 0 \) ) { ( -if (ret != -EPROBE_DEFER) -{ ... -dev_err(...); -... } | ... -dev_err(...); ) ... } // </smpl> While we're here, remove braces on if statements that only have one statement (manually). Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: linux-rtc@vger.kernel.org Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Stephen Boyd <swboyd@chromium.org> Link: https://lore.kernel.org/r/20190730181557.90391-40-swboyd@chromium.org Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-06-07rtc: tegra: Drop MODULE_ALIASDmitry Osipenko1-1/+0
RTC driver was converted to OF driver long time ago. The MODULE_ALIAS macro has no effect for the OF drivers since the alias is overridden by the drivers core to follow the OF naming convention of the driver's alias, which is based on the device-tree matching name. $ cat /sys/devices/soc0/7000e000.rtc/modalias of:NrtcT(null)Cnvidia,tegra20-rtc Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-06-01rtc: tegra: Turn into regular driverThierry Reding1-4/+4
Drivers registered with module_platform_driver_probe() are considered non-hotpluggable, which among other things means that they don't support deferred probe. However, recent changes in how the ARM SMMU works have required the BPMP (which is the clock provider on Tegra186 and later) be bound to the SMMU, which in turn means that the BPMP driver can defer probe and hence clocks become available much later than they used to. For most other drivers this is not a problem because they already properly support deferred probe, but rtc-tegra is the odd one out that now fails to probe and will therefore never be registered. Fix this by making the driver a regular driver that supports unloading and deferred probe. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-06-01rtc: tegra: Use consistent variable names and typesThierry Reding1-60/+58
Many of the variables have redundant prefixes or suffixes. Drop all of them where not necessary for context. Also make sure to use data types consistently. For instance, values read from 32-bit register accessors should be stored in u32. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-06-01rtc: tegra: checkpatch and miscellaneous cleanupsThierry Reding1-75/+79
This set of changes fixes some checkpatch warnings as well as a number of punctuation and padding inconsistencies. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-04-08rtc: tegra: convert to SPDX identifierAlexandre Belloni1-14/+1
Use SPDX-License-Identifier instead of a verbose license text. Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-04-08rtc: tegra: switch to rtc_time64_to_tm/rtc_tm_to_time64Alexandre Belloni1-4/+4
Call the 64bit versions of rtc_tm time conversion now that the range is enforced by the core. Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-04-08rtc: tegra: set rangeAlexandre Belloni1-10/+14
The Tegra 20 RTC is a 32bit seconds counter (with an unused millisecond counter). Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-12-10rtc: tegra: Switch to use %ptRAndy Shevchenko1-27/+3
Use %ptR instead of open coded variant to print content of struct rtc_time in human readable format. Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Jonathan Hunter <jonathanh@nvidia.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-10-16rtc: tegra: Propagate errors from platform_get_irq()Thierry Reding1-3/+7
Instead of confusingly returning -EBUSY on failure to obtain an interrupt, propagate the real error code. While at it, let the user know why the interrupt could not be acquired. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-07-07headers: separate linux/mod_devicetable.h from linux/platform_device.hRandy Dunlap1-0/+1
At over 4000 #includes, <linux/platform_device.h> is the 9th most #included header file in the Linux kernel. It does not need <linux/mod_devicetable.h>, so drop that header and explicitly add <linux/mod_devicetable.h> to source files that need it. 4146 #include <linux/platform_device.h> After this patch, there are 225 files that use <linux/mod_devicetable.h>, for a reduction of around 3900 times that <linux/mod_devicetable.h> does not have to be read & parsed. 225 #include <linux/mod_devicetable.h> This patch was build-tested on 20 different arch-es. It also makes these drivers SubmitChecklist#1 compliant. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: kbuild test robot <lkp@intel.com> # drivers/media/platform/vimc/ Reported-by: kbuild test robot <lkp@intel.com> # drivers/pinctrl/pinctrl-u300.c Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-03-02rtc: tegra: stop validating rtc_time in .set_timeAlexandre Belloni1-4/+0
The RTC core is always validating the rtc_time struct before calling .set_time. It is not necessary to do it again in .set_time. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2017-01-23rtc: tegra: Implement clock handlingThierry Reding1-2/+26
Accessing the registers of the RTC block on Tegra requires the module clock to be enabled. This only works because the RTC module clock will be enabled by default during early boot. However, because the clock is unused, the CCF will disable it at late_init time. This causes the RTC to become unusable afterwards. This can easily be reproduced by trying to use the RTC: $ hwclock --rtc /dev/rtc1 This will hang the system. I ran into this by following up on a report by Martin Michlmayr that reboot wasn't working on Tegra210 systems. It turns out that the rtc-tegra driver's ->shutdown() implementation will hang the CPU, because of the disabled clock, before the system can be rebooted. What confused me for a while is that the same driver is used on prior Tegra generations where the hang can not be observed. However, as Peter De Schrijver pointed out, this is because on 32-bit Tegra chips the RTC clock is enabled by the tegra20_timer.c clocksource driver, which uses the RTC to provide a persistent clock. This code is never enabled on 64-bit Tegra because the persistent clock infrastructure does not exist on 64-bit ARM. The proper fix for this is to add proper clock handling to the RTC driver in order to ensure that the clock is enabled when the driver requires it. All device trees contain the clock already, therefore no additional changes are required. Reported-by: Martin Michlmayr <tbm@cyrius.com> Acked-By Peter De Schrijver <pdeschrijver@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-01-13rtc: tegra: Sort includes alphabeticallyThierry Reding1-6/+7
The ordering of includes is currently completely arbitrary, making it impossible to decide where to put new includes. Remove the dilemma by sort the include list alphabetically. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-09-02rtc: constify rtc_class_ops structuresJulia Lawall1-1/+1
Check for rtc_class_ops structures that are only passed to devm_rtc_device_register, rtc_device_register, platform_device_register_data, all of which declare the corresponding parameter as const. Declare rtc_class_ops structures that have these properties as const. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct rtc_class_ops i@p = { ... }; @ok@ identifier r.i; expression e1,e2,e3,e4; position p; @@ ( devm_rtc_device_register(e1,e2,&i@p,e3) | rtc_device_register(e1,e2,&i@p,e3) | platform_device_register_data(e1,e2,e3,&i@p,e4) ) @bad@ position p != {r.p,ok.p}; identifier r.i; @@ i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct rtc_class_ops i = { ... }; // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Baruch Siach <baruch@tkos.co.il> Acked-by: Hans Ulli Kroll <ulli.kroll@googlemail.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-07-09rtc: simplify implementations of read_alarmUwe Kleine-König1-6/+0
Since commit d68778b80dd7 ("rtc: initialize output parameter for read alarm to "uninitialized"") there is no need to explicitly set unsupported members to -1. So drop the respective assignments from drivers. Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2015-04-15rtc: remove use of seq_printf return valueJoe Perches1-1/+3
The seq_printf return value, because it's frequently misused, will eventually be converted to void. See: commit 1f33c41c03da ("seq_file: Rename seq_overflow() to seq_has_overflowed() and make public") Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-20rtc: drop owner assignment from platform_driversWolfram Sang1-1/+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>
2013-05-18drivers/rtc: don't check resource with devm_ioremap_resourceWolfram Sang1-6/+0
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Stephen Warren <swarren@nvidia.com>
2013-04-29drivers/rtc/rtc-tegra.c: use managed rtc_device_register()Laxman Dewangan1-23/+5
Use devm_rtc_device_register() for registering RTC device. This will reduce the code for unregistering RTC device in cleanup path and remove the implementation of remove callback of platform driver. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de> Reviewed-by: Stephen Warren <swarren@nvidia.com> Cc: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29drivers/rtc/rtc-tegra.c: set irq name as device nameLaxman Dewangan1-1/+1
The irq name of tegra rtc shows as "rtc alarm" which actually does not reflect the name related to driver. Passing the device name to have the irq names with driver name. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de> Reviewed-by: Stephen Warren <swarren@nvidia.com> Cc: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29drivers/rtc/rtc-tegra.c: use struct dev_pm_ops for power managementLaxman Dewangan1-10/+8
Make the Tegra RTC controller driver define its PM callbacks through a struct dev_pm_ops object rather than by using legacy PM hooks in struct platform_driver. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de> Reviewed-by: Stephen Warren <swarren@nvidia.com> Cc: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29drivers/rtc/rtc-tegra.c: protect suspend/resume callbacks with CONFIG_PM_SLEEPLaxman Dewangan1-2/+2
CONFIG_PM doesn't actually enable any of the PM callbacks, it only allows to enable CONFIG_PM_SLEEP and CONFIG_PM_RUNTIME. This means if CONFIG_PM is used to protect system sleep callbacks then it may end up unreferenced if only runtime PM is enabled. Hence protecting sleep callbacks with CONFIG_PM_SLEEP. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de> Reviewed-by: Stephen Warren <swarren@nvidia.com> Cc: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29rtc: rtc-tegra: use module_platform_driver_probe()Jingoo Han1-11/+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>
2013-04-29rtc: rtc-tegra: add __init/__exit annotationJingoo Han1-3/+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>
2013-01-22rtc: Convert to devm_ioremap_resource()Thierry Reding1-5/+3
Convert all uses of devm_request_and_ioremap() to the newly introduced devm_ioremap_resource() which provides more consistent error handling. devm_ioremap_resource() provides its own error messages so all explicit error messages can be removed from the failure code paths. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-04drivers/rtc/rtc-tegra.c: convert to DT driverJoseph Lo1-0/+7
After Kernel 3.7, the Tegra device will only support booting with DT. The legacy Tegra RTC platform driver will not work anymore. This patch converts the driver to support DT. Signed-off-by: Joseph Lo <josephl@nvidia.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Joseph Lo <josephl@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-03Drivers: rtc: remove __dev* attributes.Greg Kroah-Hartman1-3/+3
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>
2012-05-29drivers/rtc/rtc-tegra.c: clean up probe/remove routinesHannu Heikkinen1-37/+13
Use the devres managed resource functions in the probe routine. Also affects the remove routine where the previously used free and release functions are not needed. The devm_* functions eliminate the need for manual resource releasing and simplify error handling. Resources allocated by devm_* are freed automatically on driver detach. Signed-off-by: Hannu Heikkinen <ext-hannu.m.heikkinen@nokia.com> Acked-by: Stephen Warren <swarren@wwwdotorg.org> 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>
2011-07-25drivers/rtc/rtc-tegra.c: properly initialize spinlockUwe Kleine-König1-1/+1
Using __SPIN_LOCK_UNLOCKED for a dynamically allocated lock is wrong and breaks the build with PREEMPT_RT_FULL. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Cc: Andrew Chew <achew@nvidia.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-22rtc: add real-time clock driver for NVIDIA TegraAndrew Chew1-0/+488
This is a platform driver that supports the built-in real-time clock on Tegra SOCs. Signed-off-by: Andrew Chew <achew@nvidia.com> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Acked-by: Wan ZongShun <mcuos.com@gmail.com> Acked-by: Jon Mayo <jmayo@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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