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* vfs: do bulk POLL* -> EPOLL* replacementLinus Torvalds2018-02-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | This is the mindless scripted replacement of kernel use of POLL* variables as described by Al, done by this script: for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'` for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done done with de-mangling cleanups yet to come. NOTE! On almost all architectures, the EPOLL* constants have the same values as the POLL* constants do. But they keyword here is "almost". For various bad reasons they aren't the same, and epoll() doesn't actually work quite correctly in some cases due to this on Sparc et al. The next patch from Al will sort out the final differences, and we should be all done. Scripted-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge tag 'rtc-4.16' of ↵Linus Torvalds2018-02-0212-317/+889
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux Pull RTC updates from Alexandre Belloni: "Not much this cycle. I've pushed the at32ap700x removal late but it is unlikely to cause any issues. Summary: Subsystem: - Move ABI documentation to Documentation/ABI New driver: - NXP i.MX53 SRTC - Chrome OS EC RTC Drivers: - Remove at32ap700x - Many fixes in various error paths" * tag 'rtc-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: rtc: remove rtc-at32ap700x Documentation: rtc: move iotcl interface documentation to ABI Documentation: rtc: add sysfs file permissions Documentation: rtc: move sysfs documentation to ABI rtc: mxc_v2: remove __exit annotation rtc: mxc_v2: Remove unnecessary platform_get_resource() error check rtc: add mxc driver for i.MX53 SRTC dt-bindings: rtc: add bindings for i.MX53 SRTC rtc: r7301: Fix a possible sleep-in-atomic bug in rtc7301_set_time rtc: r7301: Fix a possible sleep-in-atomic bug in rtc7301_read_time rtc: omap: fix unbalanced clk_prepare_enable/clk_disable_unprepare rtc: ac100: Fix multiple race conditions rtc: sun6i: ensure rtc is kfree'd on error rtc: cros-ec: add cros-ec-rtc driver. mfd: cros_ec: Introduce RTC commands and events definitions. rtc: stm32: Fix copyright rtc: Remove unused RTC_DEVICE_NAME_SIZE rtc: r9701: Remove r9701_remove function rtc: brcmstb-waketimer: fix error handling in brcmstb_waketmr_probe()
| * rtc: remove rtc-at32ap700xCorentin Labbe2018-01-193-295/+0
| | | | | | | | | | | | | | | | | | | | Since PLATFORM_AT32AP is an AVR32 platform which was removed, the rtc driver rtc-at32ap700x is useless. This patch remove it. Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: mxc_v2: remove __exit annotationArnd Bergmann2018-01-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | The mxc_rtc_remove is incorrectly annotated as __exit: `mxc_rtc_remove' referenced in section `.data' of drivers/rtc/rtc-mxc_v2.o: defined in discarded section `.exit.text' of drivers/rtc/rtc-mxc_v2.o This should not be done, as devices can be dynamically bound and unbound to a driver. Fixes: 54c47014b474 ("rtc: add mxc driver for i.MX53 SRTC") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: mxc_v2: Remove unnecessary platform_get_resource() error checkFabio Estevam2018-01-121-3/+0
| | | | | | | | | | | | | | | | devm_ioremap_resource() already checks if the resource is NULL, so remove the unnecessary platform_get_resource() error check. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: add mxc driver for i.MX53 SRTCPatrick Bruenn2018-01-123-0/+433
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Neither rtc-imxdi, rtc-mxc nor rtc-snvs are compatible with i.MX53. This is driver enables support for the low power domain SRTC features: - 32-bit MSB of non-rollover time counter - 32-bit alarm register Select the new config option RTC_DRV_MXC_V2 to build this driver Based on: http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/tree/drivers/rtc/rtc-mxc_v2.c?h=imx_2.6.35_11.09.01 Signed-off-by: Patrick Bruenn <p.bruenn@beckhoff.com> Acked-by: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: r7301: Fix a possible sleep-in-atomic bug in rtc7301_set_timeJia-Ju Bai2018-01-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The driver may sleep under a spinlock. The function call path is: rtc7301_set_time (acquire the spinlock) usleep_range --> may sleep To fix it, usleep_range is replaced with udelay. This bug is found by my static analysis tool(DSAC) and checked by my code review. Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: r7301: Fix a possible sleep-in-atomic bug in rtc7301_read_timeJia-Ju Bai2018-01-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The driver may sleep under a spinlock. The function call path is: rtc7301_read_time (acquire the spinlock) rtc7301_wait_while_busy usleep_range --> may sleep To fix it, usleep_range is replaced with udelay. This bug is found by my static analysis tool(DSAC) and checked by my code review. Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: omap: fix unbalanced clk_prepare_enable/clk_disable_unprepareAndreas Platschek2017-12-181-1/+4
| | | | | | | | | | | | | | | | | | | | There are 2 error paths after clk_prepare_enable() was called, where clk_disable_unprepare() is missing. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Andreas Platschek <andreas.platschek@opentech.at> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: ac100: Fix multiple race conditionsAlexandre Belloni2017-12-181-7/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The probe function is not allowed to fail after registering the RTC because the following may happen: CPU0: CPU1: sys_load_module() do_init_module() do_one_initcall() cmos_do_probe() rtc_device_register() __register_chrdev() cdev->owner = struct module* open("/dev/rtc0") rtc_device_unregister() module_put() free_module() module_free(mod->module_core) /* struct module *module is now freed */ chrdev_open() spin_lock(cdev_lock) cdev_get() try_module_get() module_is_live() /* dereferences already freed struct module* */ Also, the interrupt handler: ac100_rtc_irq() is dereferencing chip->rtc but this may still be NULL when it is called, resulting in: Unable to handle kernel NULL pointer dereference at virtual address 00000194 pgd = (ptrval) [00000194] *pgd=00000000 Internal error: Oops: 5 [#1] SMP ARM Modules linked in: CPU: 0 PID: 72 Comm: irq/71-ac100-rt Not tainted 4.15.0-rc1-next-20171201-dirty #120 Hardware name: Allwinner sun8i Family task: (ptrval) task.stack: (ptrval) PC is at mutex_lock+0x14/0x3c LR is at ac100_rtc_irq+0x38/0xc8 pc : [<c06543a4>] lr : [<c04d9a2c>] psr: 60000053 sp : ee9c9f28 ip : 00000000 fp : ee9adfdc r10: 00000000 r9 : c0a04c48 r8 : c015ed18 r7 : ee9bd600 r6 : ee9c9f28 r5 : ee9af590 r4 : c0a04c48 r3 : ef3cb3c0 r2 : 00000000 r1 : ee9af590 r0 : 00000194 Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none Control: 10c5387d Table: 4000406a DAC: 00000051 Process irq/71-ac100-rt (pid: 72, stack limit = 0x(ptrval)) Stack: (0xee9c9f28 to 0xee9ca000) 9f20: 00000000 7c2fd1be c015ed18 ee9adf40 ee9c0400 ee9c0400 9f40: ee9adf40 c015ed34 ee9c8000 ee9adf64 ee9c0400 c015f040 ee9adf80 00000000 9f60: c015ee24 7c2fd1be ee9adfc0 ee9adf80 00000000 ee9c8000 ee9adf40 c015eef4 9f80: ef1eba34 c0138f14 ee9c8000 ee9adf80 c0138df4 00000000 00000000 00000000 9fa0: 00000000 00000000 00000000 c01010e8 00000000 00000000 00000000 00000000 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 ffffffff ffffffff [<c06543a4>] (mutex_lock) from [<c04d9a2c>] (ac100_rtc_irq+0x38/0xc8) [<c04d9a2c>] (ac100_rtc_irq) from [<c015ed34>] (irq_thread_fn+0x1c/0x54) [<c015ed34>] (irq_thread_fn) from [<c015f040>] (irq_thread+0x14c/0x214) [<c015f040>] (irq_thread) from [<c0138f14>] (kthread+0x120/0x150) [<c0138f14>] (kthread) from [<c01010e8>] (ret_from_fork+0x14/0x2c) Solve both issues by moving to devm_rtc_allocate_device()/rtc_register_device() Reported-by: Quentin Schulz <quentin.schulz@free-electrons.com> Tested-by: Quentin Schulz <quentin.schulz@free-electrons.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: sun6i: ensure rtc is kfree'd on errorColin Ian King2017-12-181-1/+3
| | | | | | | | | | | | | | | | | | | | | | The error return path on clk_data allocation failure does not kfree the allocated rtc object. Fix this with a kfree of rtc on the error exit path. Detected by CoverityScan, CID#1452264 ("Resource Leak") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: cros-ec: add cros-ec-rtc driver.Stephen Barber2017-12-183-0/+424
| | | | | | | | | | | | | | | | | | | | | | | | | | On platforms with a Chrome OS EC, the EC can function as a simple RTC. Add a basic driver with this functionality. Signed-off-by: Stephen Barber <smbarber@chromium.org> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Benson Leung <bleung@chromium.org> Reviewed-by: Brian Norris <briannorris@chromium.org> Tested-by: Brian Norris <briannorris@chromium.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: stm32: Fix copyrightBenjamin Gaignard2017-11-291-2/+2
| | | | | | | | | | | | | | | | | | Uniformize STMicroelectronics copyrights header Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> CC: Amelie Delaunay <amelie.delaunay@st.com> Acked-by: Alexandre TORGUE <alexandre.torgue@st.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: r9701: Remove r9701_remove functionNobuhiro Iwamatsu2017-11-291-6/+0
| | | | | | | | | | | | | | r9701_remove function is now empty, remove it. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: brcmstb-waketimer: fix error handling in brcmstb_waketmr_probe()Alexey Khoroshilov2017-11-291-3/+12
| | | | | | | | | | | | | | | | | | | | | | brcmstb_waketmr_probe() does not disable timer->clk on error paths. Found by Linux Driver Verification project (linuxtesting.org). Fixes: c4f07ecee22e ("rtc: brcmstb-waketimer: Add Broadcom STB wake-timer") Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
* | Merge tag 'powerpc-4.16-1' of ↵Linus Torvalds2018-02-021-2/+10
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: "Highlights: - Enable support for memory protection keys aka "pkeys" on Power7/8/9 when using the hash table MMU. - Extend our interrupt soft masking to support masking PMU interrupts as well as "normal" interrupts, and then use that to implement local_t for a ~4x speedup vs the current atomics-based implementation. - A new driver "ocxl" for "Open Coherent Accelerator Processor Interface (OpenCAPI)" devices. - Support for new device tree properties on PowerVM to describe hotpluggable memory and devices. - Add support for CLOCK_{REALTIME/MONOTONIC}_COARSE to the 64-bit VDSO. - Freescale updates from Scott: fixes for CPM GPIO and an FSL PCI erratum workaround, plus a minor cleanup patch. As well as quite a lot of other changes all over the place, and small fixes and cleanups as always. Thanks to: Alan Modra, Alastair D'Silva, Alexey Kardashevskiy, Alistair Popple, Andreas Schwab, Andrew Donnellan, Aneesh Kumar K.V, Anju T Sudhakar, Anshuman Khandual, Anton Blanchard, Arnd Bergmann, Balbir Singh, Benjamin Herrenschmidt, Bhaktipriya Shridhar, Bryant G. Ly, Cédric Le Goater, Christophe Leroy, Christophe Lombard, Cyril Bur, David Gibson, Desnes A. Nunes do Rosario, Dmitry Torokhov, Frederic Barrat, Geert Uytterhoeven, Guilherme G. Piccoli, Gustavo A. R. Silva, Gustavo Romero, Ivan Mikhaylov, Joakim Tjernlund, Joe Perches, Josh Poimboeuf, Juan J. Alvarez, Julia Cartwright, Kamalesh Babulal, Madhavan Srinivasan, Mahesh Salgaonkar, Mathieu Malaterre, Michael Bringmann, Michael Hanselmann, Michael Neuling, Nathan Fontenot, Naveen N. Rao, Nicholas Piggin, Paul Mackerras, Philippe Bergheaud, Ram Pai, Russell Currey, Santosh Sivaraj, Scott Wood, Seth Forshee, Simon Guo, Stewart Smith, Sukadev Bhattiprolu, Thiago Jung Bauermann, Vaibhav Jain, Vasyl Gomonovych" * tag 'powerpc-4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (199 commits) powerpc/mm/radix: Fix build error when RADIX_MMU=n macintosh/ams-input: Use true and false for boolean values macintosh: change some data types from int to bool powerpc/watchdog: Print the NIP in soft_nmi_interrupt() powerpc/watchdog: regs can't be null in soft_nmi_interrupt() powerpc/watchdog: Tweak watchdog printks powerpc/cell: Remove axonram driver rtc-opal: Fix handling of firmware error codes, prevent busy loops powerpc/mpc52xx_gpt: make use of raw_spinlock variants macintosh/adb: Properly mark continued kernel messages powerpc/pseries: Fix cpu hotplug crash with memoryless nodes powerpc/numa: Ensure nodes initialized for hotplug powerpc/numa: Use ibm,max-associativity-domains to discover possible nodes powerpc/kernel: Block interrupts when updating TIDR powerpc/powernv/idoa: Remove unnecessary pcidev from pci_dn powerpc/mm/nohash: do not flush the entire mm when range is a single page powerpc/pseries: Add Initialization of VF Bars powerpc/pseries/pci: Associate PEs to VFs in configure SR-IOV powerpc/eeh: Add EEH notify resume sysfs powerpc/eeh: Add EEH operations to notify resume ...
| * | rtc-opal: Fix handling of firmware error codes, prevent busy loopsStewart Smith2018-01-271-2/+10
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to the OPAL docs: skiboot-5.2.5/doc/opal-api/opal-rtc-read-3.txt skiboot-5.2.5/doc/opal-api/opal-rtc-write-4.txt OPAL_HARDWARE may be returned from OPAL_RTC_READ or OPAL_RTC_WRITE and this indicates either a transient or permanent error. Prior to this patch, Linux was not dealing with OPAL_HARDWARE being a permanent error particularly well, in that you could end up in a busy loop. This was not too hard to trigger on an AMI BMC based OpenPOWER machine doing a continuous "ipmitool mc reset cold" to the BMC, the result of that being that we'd get stuck in an infinite loop in opal_get_rtc_time(). We now retry a few times before returning the error higher up the stack. Fixes: 16b1d26e77b1 ("rtc/tpo: Driver to support rtc and wakeup on PowerNV platform") Cc: stable@vger.kernel.org # v3.19+ Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* | Merge tag 'clk-for-linus' of ↵Linus Torvalds2018-02-021-2/+4
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux Pull clk updates from Stephen Boyd: "The core framework has a handful of patches this time around, mostly due to the clk rate protection support added by Jerome Brunet. This feature will allow consumers to lock in a certain rate on the output of a clk so that things like audio playback don't hear pops when the clk frequency changes due to shared parent clks changing rates. Currently the clk API doesn't guarantee the rate of a clk stays at the rate you request after clk_set_rate() is called, so this new API will allow drivers to express that requirement. Beyond this, the core got some debugfs pretty printing patches and a couple minor non-critical fixes. Looking outside of the core framework diff we have some new driver additions and the removal of a legacy TI clk driver. Both of these hit high in the dirstat. Also, the removal of the asm-generic/clkdev.h file causes small one-liners in all the architecture Kbuild files. Overall, the driver diff seems to be the normal stuff that comes all the time to fix little problems here and there and to support new hardware. Summary: Core: - Clk rate protection - Symbolic clk flags in debugfs output - Clk registration enabled clks while doing bookkeeping updates New Drivers: - Spreadtrum SC9860 - HiSilicon hi3660 stub - Qualcomm A53 PLL, SPMI clkdiv, and MSM8916 APCS - Amlogic Meson-AXG - ASPEED BMC Removed Drivers: - TI OMAP 3xxx legacy clk (non-DT) support - asm*/clkdev.h got removed (not really a driver) Updates: - Renesas FDP1-0 module clock on R-Car M3-W - Renesas LVDS module clock on R-Car V3M - Misc fixes to pr_err() prints - Qualcomm MSM8916 audio fixes - Qualcomm IPQ8074 rounded out support for more peripherals - Qualcomm Alpha PLL variants - Divider code was using container_of() on bad pointers - Allwinner DE2 clks on H3 - Amlogic minor data fixes and dropping of CLK_IGNORE_UNUSED - Mediatek clk driver compile test support - AT91 PMC clk suspend/resume restoration support - PLL issues fixed on si5351 - Broadcom IProc PLL calculation updates - DVFS support for Armada mvebu CPU clks - Allwinner fixed post-divider support - TI clkctrl fixes and support for newer SoCs" * tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (125 commits) clk: aspeed: Handle inverse polarity of USB port 1 clock gate clk: aspeed: Fix return value check in aspeed_cc_init() clk: aspeed: Add reset controller clk: aspeed: Register gated clocks clk: aspeed: Add platform driver and register PLLs clk: aspeed: Register core clocks clk: Add clock driver for ASPEED BMC SoCs clk: mediatek: adjust dependency of reset.c to avoid unexpectedly being built clk: fix reentrancy of clk_enable() on UP systems clk: meson-axg: fix potential NULL dereference in axg_clkc_probe() clk: Simplify debugfs registration clk: Fix debugfs_create_*() usage clk: Show symbolic clock flags in debugfs clk: renesas: r8a7796: Add FDP clock clk: Move __clk_{get,put}() into private clk.h API clk: sunxi: Use CLK_IS_CRITICAL flag for critical clks clk: Improve flags doc for of_clk_detect_critical() arch: Remove clkdev.h asm-generic from Kbuild clk: sunxi-ng: a83t: Add M divider to TCON1 clock clk: Prepare to remove asm-generic/clkdev.h ...
| * | clk: divider: fix incorrect usage of container_ofJerome Brunet2017-12-291-2/+4
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | divider_recalc_rate() is an helper function used by clock divider of different types, so the structure containing the 'hw' pointer is not always a 'struct clk_divider' At the following line: > div = _get_div(table, val, flags, divider->width); in several cases, the value of 'divider->width' is garbage as the actual structure behind this memory is not a 'struct clk_divider' Fortunately, this width value is used by _get_val() only when CLK_DIVIDER_MAX_AT_ZERO flag is set. This has never been the case so far when the structure is not a 'struct clk_divider'. This is probably why we did not notice this bug before Fixes: afe76c8fd030 ("clk: allow a clk divider with max divisor when zero") Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Sylvain Lemieux <slemieux.tyco@gmail.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* / the rest of drivers/*: annotate ->poll() instancesAl Viro2017-11-281-1/+1
|/ | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'timers-urgent-for-linus' of ↵Linus Torvalds2017-11-251-3/+3
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer updates from Thomas Gleixner: - The final conversion of timer wheel timers to timer_setup(). A few manual conversions and a large coccinelle assisted sweep and the removal of the old initialization mechanisms and the related code. - Remove the now unused VSYSCALL update code - Fix permissions of /proc/timer_list. I still need to get rid of that file completely - Rename a misnomed clocksource function and remove a stale declaration * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits) m68k/macboing: Fix missed timer callback assignment treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts timer: Remove redundant __setup_timer*() macros timer: Pass function down to initialization routines timer: Remove unused data arguments from macros timer: Switch callback prototype to take struct timer_list * argument timer: Pass timer_list pointer to callbacks unconditionally Coccinelle: Remove setup_timer.cocci timer: Remove setup_*timer() interface timer: Remove init_timer() interface treewide: setup_timer() -> timer_setup() (2 field) treewide: setup_timer() -> timer_setup() treewide: init_timer() -> setup_timer() treewide: Switch DEFINE_TIMER callbacks to struct timer_list * s390: cmm: Convert timers to use timer_setup() lightnvm: Convert timers to use timer_setup() drivers/net: cris: Convert timers to use timer_setup() drm/vc4: Convert timers to use timer_setup() block/laptop_mode: Convert timers to use timer_setup() net/atm/mpc: Avoid open-coded assignment of timer callback function ...
| * treewide: setup_timer() -> timer_setup()Kees Cook2017-11-221-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This converts all remaining cases of the old setup_timer() API into using timer_setup(), where the callback argument is the structure already holding the struct timer_list. These should have no behavioral changes, since they just change which pointer is passed into the callback with the same available pointers after conversion. It handles the following examples, in addition to some other variations. Casting from unsigned long: void my_callback(unsigned long data) { struct something *ptr = (struct something *)data; ... } ... setup_timer(&ptr->my_timer, my_callback, ptr); and forced object casts: void my_callback(struct something *ptr) { ... } ... setup_timer(&ptr->my_timer, my_callback, (unsigned long)ptr); become: void my_callback(struct timer_list *t) { struct something *ptr = from_timer(ptr, t, my_timer); ... } ... timer_setup(&ptr->my_timer, my_callback, 0); Direct function assignments: void my_callback(unsigned long data) { struct something *ptr = (struct something *)data; ... } ... ptr->my_timer.function = my_callback; have a temporary cast added, along with converting the args: void my_callback(struct timer_list *t) { struct something *ptr = from_timer(ptr, t, my_timer); ... } ... ptr->my_timer.function = (TIMER_FUNC_TYPE)my_callback; And finally, callbacks without a data assignment: void my_callback(unsigned long data) { ... } ... setup_timer(&ptr->my_timer, my_callback, 0); have their argument renamed to verify they're unused during conversion: void my_callback(struct timer_list *unused) { ... } ... timer_setup(&ptr->my_timer, my_callback, 0); The conversion is done with the following Coccinelle script: spatch --very-quiet --all-includes --include-headers \ -I ./arch/x86/include -I ./arch/x86/include/generated \ -I ./include -I ./arch/x86/include/uapi \ -I ./arch/x86/include/generated/uapi -I ./include/uapi \ -I ./include/generated/uapi --include ./include/linux/kconfig.h \ --dir . \ --cocci-file ~/src/data/timer_setup.cocci @fix_address_of@ expression e; @@ setup_timer( -&(e) +&e , ...) // Update any raw setup_timer() usages that have a NULL callback, but // would otherwise match change_timer_function_usage, since the latter // will update all function assignments done in the face of a NULL // function initialization in setup_timer(). @change_timer_function_usage_NULL@ expression _E; identifier _timer; type _cast_data; @@ ( -setup_timer(&_E->_timer, NULL, _E); +timer_setup(&_E->_timer, NULL, 0); | -setup_timer(&_E->_timer, NULL, (_cast_data)_E); +timer_setup(&_E->_timer, NULL, 0); | -setup_timer(&_E._timer, NULL, &_E); +timer_setup(&_E._timer, NULL, 0); | -setup_timer(&_E._timer, NULL, (_cast_data)&_E); +timer_setup(&_E._timer, NULL, 0); ) @change_timer_function_usage@ expression _E; identifier _timer; struct timer_list _stl; identifier _callback; type _cast_func, _cast_data; @@ ( -setup_timer(&_E->_timer, _callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, &_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, &_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)&_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)&_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E._timer, _callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, &_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, &_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | _E->_timer@_stl.function = _callback; | _E->_timer@_stl.function = &_callback; | _E->_timer@_stl.function = (_cast_func)_callback; | _E->_timer@_stl.function = (_cast_func)&_callback; | _E._timer@_stl.function = _callback; | _E._timer@_stl.function = &_callback; | _E._timer@_stl.function = (_cast_func)_callback; | _E._timer@_stl.function = (_cast_func)&_callback; ) // callback(unsigned long arg) @change_callback_handle_cast depends on change_timer_function_usage@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _origtype; identifier _origarg; type _handletype; identifier _handle; @@ void _callback( -_origtype _origarg +struct timer_list *t ) { ( ... when != _origarg _handletype *_handle = -(_handletype *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle = -(void *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle; ... when != _handle _handle = -(_handletype *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle; ... when != _handle _handle = -(void *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg ) } // callback(unsigned long arg) without existing variable @change_callback_handle_cast_no_arg depends on change_timer_function_usage && !change_callback_handle_cast@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _origtype; identifier _origarg; type _handletype; @@ void _callback( -_origtype _origarg +struct timer_list *t ) { + _handletype *_origarg = from_timer(_origarg, t, _timer); + ... when != _origarg - (_handletype *)_origarg + _origarg ... when != _origarg } // Avoid already converted callbacks. @match_callback_converted depends on change_timer_function_usage && !change_callback_handle_cast && !change_callback_handle_cast_no_arg@ identifier change_timer_function_usage._callback; identifier t; @@ void _callback(struct timer_list *t) { ... } // callback(struct something *handle) @change_callback_handle_arg depends on change_timer_function_usage && !match_callback_converted && !change_callback_handle_cast && !change_callback_handle_cast_no_arg@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _handletype; identifier _handle; @@ void _callback( -_handletype *_handle +struct timer_list *t ) { + _handletype *_handle = from_timer(_handle, t, _timer); ... } // If change_callback_handle_arg ran on an empty function, remove // the added handler. @unchange_callback_handle_arg depends on change_timer_function_usage && change_callback_handle_arg@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _handletype; identifier _handle; identifier t; @@ void _callback(struct timer_list *t) { - _handletype *_handle = from_timer(_handle, t, _timer); } // We only want to refactor the setup_timer() data argument if we've found // the matching callback. This undoes changes in change_timer_function_usage. @unchange_timer_function_usage depends on change_timer_function_usage && !change_callback_handle_cast && !change_callback_handle_cast_no_arg && !change_callback_handle_arg@ expression change_timer_function_usage._E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type change_timer_function_usage._cast_data; @@ ( -timer_setup(&_E->_timer, _callback, 0); +setup_timer(&_E->_timer, _callback, (_cast_data)_E); | -timer_setup(&_E._timer, _callback, 0); +setup_timer(&_E._timer, _callback, (_cast_data)&_E); ) // If we fixed a callback from a .function assignment, fix the // assignment cast now. @change_timer_function_assignment depends on change_timer_function_usage && (change_callback_handle_cast || change_callback_handle_cast_no_arg || change_callback_handle_arg)@ expression change_timer_function_usage._E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type _cast_func; typedef TIMER_FUNC_TYPE; @@ ( _E->_timer.function = -_callback +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -&_callback +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -(_cast_func)_callback; +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -(_cast_func)&_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -&_callback; +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -(_cast_func)_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -(_cast_func)&_callback +(TIMER_FUNC_TYPE)_callback ; ) // Sometimes timer functions are called directly. Replace matched args. @change_timer_function_calls depends on change_timer_function_usage && (change_callback_handle_cast || change_callback_handle_cast_no_arg || change_callback_handle_arg)@ expression _E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type _cast_data; @@ _callback( ( -(_cast_data)_E +&_E->_timer | -(_cast_data)&_E +&_E._timer | -_E +&_E->_timer ) ) // If a timer has been configured without a data argument, it can be // converted without regard to the callback argument, since it is unused. @match_timer_function_unused_data@ expression _E; identifier _timer; identifier _callback; @@ ( -setup_timer(&_E->_timer, _callback, 0); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, 0L); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, 0UL); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0L); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0UL); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_timer, _callback, 0); +timer_setup(&_timer, _callback, 0); | -setup_timer(&_timer, _callback, 0L); +timer_setup(&_timer, _callback, 0); | -setup_timer(&_timer, _callback, 0UL); +timer_setup(&_timer, _callback, 0); | -setup_timer(_timer, _callback, 0); +timer_setup(_timer, _callback, 0); | -setup_timer(_timer, _callback, 0L); +timer_setup(_timer, _callback, 0); | -setup_timer(_timer, _callback, 0UL); +timer_setup(_timer, _callback, 0); ) @change_callback_unused_data depends on match_timer_function_unused_data@ identifier match_timer_function_unused_data._callback; type _origtype; identifier _origarg; @@ void _callback( -_origtype _origarg +struct timer_list *unused ) { ... when != _origarg } Signed-off-by: Kees Cook <keescook@chromium.org>
* | Merge tag 'rtc-4.15' of ↵Linus Torvalds2017-11-2324-275/+1815
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux Pull RTC updates from Alexandre Belloni: "There is nothing scary this cycle, mostly driver fixes and updates. The core fix has been in for a while and has been tested on multiple kernel revisions by multiple teams. Core: - Fix setting the alarm to the next expiring timer New drivers: - Mediatek MT7622 RTC - NXP PCF85363 - Spreadtrum SC27xx PMIC RTC Drivers updates: - Use generic nvmem to expose the Non volatile ram for ds1305, ds1511, m48t86 and omap - abx80x: solve possible race condition at probe - armada38x: support trimming the RTC oscillator - at91rm9200: fix reading the alarm value at boot - ds1511: allow waking platform - m41t80: rework square wave output - pcf8523: support trimming the RTC oscillator - pcf8563: fix clock output rate - pl031: make interrupt optional - xgene: fix suspend/resume" * tag 'rtc-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (50 commits) dt-bindings: rtc: imxdi: Improve the bindings text rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driver dt-bindings: rtc: Add Spreadtrum SC27xx RTC documentation rtc: at91rm9200: fix reading alarm value rtc: at91rm9200: stop calculating yday in at91_rtc_readalarm rtc: sysfs: Use time64_t variables to set time/alarm rtc: xgene: mark PM functions as __maybe_unused rtc: xgene: Fix suspend/resume rtc: pcf8563: don't alway enable the alarm rtc: pcf8563: fix output clock rate rtc: rx8010: Fix for incorrect return value rtc: rx8010: Specify correct address for RX8010_RESV31 rtc: rx8010: Remove duplicate define rtc: m41t80: remove unneeded checks from m41t80_sqw_set_rate rtc: m41t80: avoid i2c read in m41t80_sqw_is_prepared rtc: m41t80: avoid i2c read in m41t80_sqw_recalc_rate rtc: m41t80: fix m41t80_sqw_round_rate return value rtc: m41t80: m41t80_sqw_set_rate should return 0 on success rtc: add support for NXP PCF85363 real-time clock rtc: omap: Support scratch registers ...
| * rtc: sc27xx: Add Spreadtrum SC27xx PMIC RTC driverBaolin Wang2017-11-203-0/+674
| | | | | | | | | | | | | | | | This patch adds the Spreadtrum RTC driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: at91rm9200: fix reading alarm valueAlexandre Belloni2017-11-101-12/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When alarm value is read at boot time, at91_alarm_year is not yet set to the proper value so the year is always set to 1900. This results in that kind of message at boot: rtc rtc0: invalid alarm value: 1900-1-14 2:11:39 There is no way to recover from that as the alarm is now only read when booting. Instead, rely on the rtc core to figure out the proper year. Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: at91rm9200: stop calculating yday in at91_rtc_readalarmAlexandre Belloni2017-11-101-1/+0
| | | | | | | | | | | | | | | | | | Calculating yday in the read_alarm callback is useless as this value is never used later. Also, it was buggy anyway because at the time this is done, tm_year is always 0 as the alarm register doesn't hold the year. Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: sysfs: Use time64_t variables to set time/alarmBaolin Wang2017-11-101-12/+13
| | | | | | | | | | | | | | | | | | Use time64_t variables and related APIs for sysfs interfaces to support setting time or alarm after the year 2038 on 32-bit system. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: xgene: mark PM functions as __maybe_unusedArnd Bergmann2017-11-091-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The new xgene_rtc_alarm_irq_enabled() function is only accessed from PM code, which is inside of an #ifdef; this causes a harmless build warning when CONFIG_PM is disabled: drivers/rtc/rtc-xgene.c:108:12: error: 'xgene_rtc_alarm_irq_enabled' defined but not used [-Werror=unused-function] Just remove the #ifdef and use __maybe_unused annotations instead, to make the code more robust here. Fixes: d0bcd82b1379 ("rtc: xgene: Fix suspend/resume") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Loc Ho <lho@apm.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: xgene: Fix suspend/resumeLoc Ho2017-11-091-9/+32
| | | | | | | | | | | | | | | | | | This patch fixes suspend/resume functions properly for the APM X-Gene SoC RTC driver. Signed-off-by: Loc Ho <lho@apm.com> Reviewed-by: Mark Brown <broonie@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: pcf8563: don't alway enable the alarmAlexandre Belloni2017-11-091-1/+1
| | | | | | | | | | | | | | Allow setting the alarm and later enable it instead of enabling it unconditionally. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: pcf8563: fix output clock ratePhilipp Zabel2017-11-091-1/+1
| | | | | | | | | | | | | | | | | | | | The pcf8563_clkout_recalc_rate function erroneously ignores the frequency index read from the CLKO register and always returns 32768 Hz. Fixes: a39a6405d5f9 ("rtc: pcf8563: add CLKOUT to common clock framework") Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: rx8010: Fix for incorrect return valueAkshay Bhat2017-11-091-2/+2
| | | | | | | | | | | | | | | | | | The err variable is not being reset after a successful read. Explicitly return 0 at the end of function call to account for all return paths. Reported-by: Jens-Peter Oswald <oswald@lre.de> Signed-off-by: Akshay Bhat <akshay.bhat@timesys.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: rx8010: Specify correct address for RX8010_RESV31Akshay Bhat2017-11-081-1/+1
| | | | | | | | | | | | | | | | | | Define for reserved register 31 had the incorrect address. Specify the correct address. Reported-by: Jens-Peter Oswald <oswald@lre.de> Signed-off-by: Akshay Bhat <akshay.bhat@timesys.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: rx8010: Remove duplicate defineAkshay Bhat2017-11-081-1/+0
| | | | | | | | | | | | | | Remove duplicate define for RX8010_YEAR Signed-off-by: Akshay Bhat <akshay.bhat@timesys.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: m41t80: remove unneeded checks from m41t80_sqw_set_rateTroy Kisky2017-11-081-11/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | m41t80_sqw_set_rate will be called with the result from m41t80_sqw_round_rate, so might as well make m41t80_sqw_set_rate(n) same as m41t80_sqw_set_rate(m41t80_sqw_round_rate(n)) As Russell King wrote[1], "clk_round_rate() is supposed to tell you what you end up with if you ask clk_set_rate() to set the exact same value you passed in - but clk_round_rate() won't modify the hardware." [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2012-January/080175.html Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: m41t80: avoid i2c read in m41t80_sqw_is_preparedTroy Kisky2017-11-081-9/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a little more efficient and avoids the warning WARNING: possible circular locking dependency detected 4.14.0-rc7-00010 #16 Not tainted ------------------------------------------------------ kworker/2:1/70 is trying to acquire lock: (prepare_lock){+.+.}, at: [<c049300c>] clk_prepare_lock+0x80/0xf4 but task is already holding lock: (i2c_register_adapter){+.+.}, at: [<c0690b04>] i2c_adapter_lock_bus+0x14/0x18 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (i2c_register_adapter){+.+.}: rt_mutex_lock+0x44/0x5c i2c_adapter_lock_bus+0x14/0x18 i2c_transfer+0xa8/0xbc i2c_smbus_xfer+0x20c/0x5d8 i2c_smbus_read_byte_data+0x38/0x48 m41t80_sqw_is_prepared+0x18/0x28 Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: m41t80: avoid i2c read in m41t80_sqw_recalc_rateTroy Kisky2017-11-081-11/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a little more efficient, and avoids the warning WARNING: possible circular locking dependency detected 4.14.0-rc7-00007 #14 Not tainted ------------------------------------------------------ alsactl/330 is trying to acquire lock: (prepare_lock){+.+.}, at: [<c049300c>] clk_prepare_lock+0x80/0xf4 but task is already holding lock: (i2c_register_adapter){+.+.}, at: [<c0690ae0>] i2c_adapter_lock_bus+0x14/0x18 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (i2c_register_adapter){+.+.}: rt_mutex_lock+0x44/0x5c i2c_adapter_lock_bus+0x14/0x18 i2c_transfer+0xa8/0xbc i2c_smbus_xfer+0x20c/0x5d8 i2c_smbus_read_byte_data+0x38/0x48 m41t80_sqw_recalc_rate+0x24/0x58 Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: m41t80: fix m41t80_sqw_round_rate return valueTroy Kisky2017-11-081-12/+7
| | | | | | | | | | | | | | | | | | | | | | | | Previously it was returning the best of 32768, 8192, 1024, 64, 2, 0 Now, best of 32768, 8192, 4096, 2048, 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 1, 0 Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: m41t80: m41t80_sqw_set_rate should return 0 on successTroy Kisky2017-11-081-4/+1
| | | | | | | | | | | | | | Previously it was returning -EINVAL upon success. Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: add support for NXP PCF85363 real-time clockEric Nelson2017-11-083-0/+234
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Note that alarms are not currently implemented. 64 bytes of nvmem is supported and exposed in sysfs (# is the instance number, starting with 0): /sys/bus/nvmem/devices/pcf85363-#/nvmem Signed-off-by: Eric Nelson <eric@nelint.com> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com> Tested-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: omap: Support scratch registersAlexandre Belloni2017-11-081-0/+45
| | | | | | | | | | | | | | | | | | | | Register an nvmem device to expose the 3 scratch registers (total of 12 bytes) to both userspace and kernel space. Reviewed-by: Sekhar Nori <nsekhar@ti.com> Tested-by: Keerthy <j-keerthy@ti.com> Reviewed-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: omap: switch to rtc_register_deviceAlexandre Belloni2017-10-311-2/+7
| | | | | | | | | | | | | | This removes a possible race condition and crash and allows for further improvement of the driver. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: omap: fix error path when pinctrl_register failsAlexandre Belloni2017-10-311-1/+2
| | | | | | | | | | | | | | | | | | If pinctrl_register() fails probe will return with an error without locking the RTC and disabling pm_runtime. Set ret and jump to err instead. Fixes: 97ea1906b3c2 ("rtc: omap: Support ext_wakeup configuration") Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: ds1390: Add OF device ID tableAlexandre Belloni2017-10-271-0/+7
| | | | | | | | | | | | | | | | | | | | The driver doesn't have a struct of_device_id table but supported devices are registered via Device Trees. Worse, the compatible is documented but doesn't currently match the driver. Add the proper compatible to the driver. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: ds1307: add OF and ACPI entries for Epson RX8130Bastian Stender2017-10-261-0/+5
| | | | | | | | | | | | | | | | Make Epson RX8130 device tree and ACPI aware. Fixes: ee0981be7704 ("rtc: ds1307: Add support for Epson RX8130CE") Signed-off-by: Bastian Stender <bst@pengutronix.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: mediatek: enhance the description for MediaTek PMIC based RTCSean Wang2017-10-261-4/+4
| | | | | | | | | | | | | | | | | | | | | | Give a better description for original MediaTek RTC driver as PMIC based RTC in order to distinguish SoC based RTC. Also turning all words with Mediatek to MediaTek here. Cc: Eddie Huang <eddie.huang@mediatek.com> Signed-off-by: Sean Wang <sean.wang@mediatek.com> Acked-by: Eddie Huang <eddie.huang@mediatek.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: mediatek: add driver for RTC on MT7622 SoCSean Wang2017-10-263-0/+433
| | | | | | | | | | | | | | | | This patch introduces the driver for the RTC on MT7622 SoC. Signed-off-by: Sean Wang <sean.wang@mediatek.com> Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: pcf8523: add support for trimming the RTC oscillatorRussell King2017-10-251-0/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | Add support for reading and writing the RTC offset register, converting it to the corresponding parts-per-billion value. When setting the drift, the PCF8523 has two modes: one applies the adjustment every two hours, the other applies the adjustment every minute. We select between these two modes according to which ever gives the closest PPB value to the one requested. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: armada38x: add support for trimming the RTCRussell King2017-10-251-0/+101
| | | | | | | | | | | | | | | | | | | | Add support for trimming the RTC using the offset mechanism. This RTC supports two modes: low update mode and high update mode. Low update mode has finer precision than high update mode, so we use the low mode where possible. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| * rtc: clarify the RTC offset correctionRussell King2017-10-251-0/+4
| | | | | | | | | | | | | | | | | | The RTC offset correction documentation is not very clear about the exact relationship between "offset" and the effect it has on the RTC. Supplement the documentation with an equation giving the relationship. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 15:56:41 +0100