kernel/linux.git/drivers/clocksource/timer-of.c, branch v6.6.132

clocksource/drivers/timer-of: Remove percpu irq related code

2024-09-12T09:11:42+00:00

commit 471ef0b5a8aaca4296108e756b970acfc499ede4 upstream. GCC's named address space checks errors out with: drivers/clocksource/timer-of.c: In function ‘timer_of_irq_exit’: drivers/clocksource/timer-of.c:29:46: error: passing argument 2 of ‘free_percpu_irq’ from pointer to non-enclosed address space 29 | free_percpu_irq(of_irq->irq, clkevt); | ^~~~~~ In file included from drivers/clocksource/timer-of.c:8: ./include/linux/interrupt.h:201:43: note: expected ‘__seg_gs void *’ but argument is of type ‘struct clock_event_device *’ 201 | extern void free_percpu_irq(unsigned int, void __percpu *); | ^~~~~~~~~~~~~~~ drivers/clocksource/timer-of.c: In function ‘timer_of_irq_init’: drivers/clocksource/timer-of.c:74:51: error: passing argument 4 of ‘request_percpu_irq’ from pointer to non-enclosed address space 74 | np->full_name, clkevt) : | ^~~~~~ ./include/linux/interrupt.h:190:56: note: expected ‘__seg_gs void *’ but argument is of type ‘struct clock_event_device *’ 190 | const char *devname, void __percpu *percpu_dev_id) Sparse warns about: timer-of.c:29:46: warning: incorrect type in argument 2 (different address spaces) timer-of.c:29:46: expected void [noderef] __percpu * timer-of.c:29:46: got struct clock_event_device *clkevt timer-of.c:74:51: warning: incorrect type in argument 4 (different address spaces) timer-of.c:74:51: expected void [noderef] __percpu *percpu_dev_id timer-of.c:74:51: got struct clock_event_device *clkevt It appears the code is incorrect as reported by Uros Bizjak: "The referred code is questionable as it tries to reuse the clkevent pointer once as percpu pointer and once as generic pointer, which should be avoided." This change removes the percpu related code as no drivers is using it. [Daniel: Fixed the description] Fixes: dc11bae785295 ("clocksource/drivers: Add timer-of common init routine") Reported-by: Uros Bizjak Tested-by: Uros Bizjak Link: https://lore.kernel.org/r/20240819100335.2394751-1-daniel.lezcano@linaro.org Signed-off-by: Daniel Lezcano Signed-off-by: Greg Kroah-Hartman

clocksource/drivers/timer-of: Check return value of of_iomap in timer_of_base_init()

2022-03-07T18:21:25+00:00

of_base->base can either be iomapped using of_io_request_and_map() or of_iomap() depending whether or not an of_base->name has been set. Thus check of_base->base against NULL as of_iomap() does not return a PTR_ERR() in case of error. Fixes: 9aea417afa6b ("clocksource/drivers/timer-of: Don't request the resource by name") Signed-off-by: Guillaume Ranquet Link: https://lore.kernel.org/r/20220307172656.4836-1-granquet@baylibre.com Signed-off-by: Daniel Lezcano

timekeeping, clocksource: Fix various typos in comments

2021-03-22T22:06:48+00:00

Fix ~56 single-word typos in timekeeping & clocksource code comments. Signed-off-by: Ingo Molnar Cc: Thomas Gleixner Cc: John Stultz Cc: Stephen Boyd Cc: Daniel Lezcano Cc: linux-kernel@vger.kernel.org

Merge tag 'timers-v5.6' of https://git.linaro.org/people/daniel.lezcano/linux into timers/core

2019-11-04T17:49:13+00:00

Pull clockevent updates from Daniel Lezcano: - Some cleanups for the timer-of, use %p0F and the unique device name (Geert Uytterhoeven) - Use timer-of for the renesas-ostm and the device name to prevent name collision in case of multiple timers (Geert Uytterhoeven) - Check if there is an error after calling of_clk_get in asm9260 (Chuhong Yuan)

clocksource/drivers/timer-of: Use unique device name instead of timer

2019-11-04T09:38:46+00:00

If a hardware-specific driver does not provide a name, the timer-of core falls back to device_node.name. Due to generic DT node naming policies, that name is almost always "timer", and thus doesn't identify the actual timer used. Fix this by using device_node.full_name instead, which includes the unit addrees. Example impact on /proc/timer_list: -Clock Event Device: timer +Clock Event Device: timer@fcfec400 Signed-off-by: Geert Uytterhoeven Reviewed-by: Rob Herring Signed-off-by: Daniel Lezcano Link: https://lore.kernel.org/r/20191016144747.29538-3-geert+renesas@glider.be

clocksource/drivers/timer-of: Convert last full_name to %pOF

2019-11-04T09:38:46+00:00

Commit 469869d18a886e04 ("clocksource: Convert to using %pOF instead of full_name") converted all but the one just added before by commit 32f2fea6e77e64cd ("clocksource/drivers/timer-of: Handle of_irq_get_byname() result correctly"). Signed-off-by: Geert Uytterhoeven Signed-off-by: Daniel Lezcano Link: https://lore.kernel.org/r/20191016144747.29538-2-geert+renesas@glider.be

timer-of: don't use conditional expression with mixed 'void' types

2019-10-02T23:16:07+00:00

Randy Dunlap reports on the sparse list that sparse warns about this expression: of_irq->percpu ? free_percpu_irq(of_irq->irq, clkevt) : free_irq(of_irq->irq, clkevt); and honestly, sparse is correct to warn. The return type of free_percpu_irq() is 'void', while free_irq() returns a 'const void *' that is the devname argument passed in to the request_irq(). You can't mix a void type with a non-void types in a conditional expression according to the C standard. It so happens that gcc seems to accept it - and the resulting type of the expression is void - but there's really no reason for the kernel to have this kind of non-standard expression with no real upside. The natural way to write that expression is with an if-statement: if (of_irq->percpu) free_percpu_irq(of_irq->irq, clkevt); else free_irq(of_irq->irq, clkevt); which is more legible anyway. I'm not sure why that timer-of code seems to have this odd pattern. It does the same at allocation time, but at least there the types match, and it makes sense as an expression. Reported-by: Randy Dunlap Signed-off-by: Linus Torvalds

clocksource/drivers/timer-of: Do not warn on deferred probe

2019-08-26T22:31:39+00:00

Deferred probe is an expected return value for clk_get() on many platforms. The driver deals with it properly, so there's no need to output a warning that may potentially confuse users. Signed-off-by: Jon Hunter Signed-off-by: Daniel Lezcano

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201

2019-05-30T18:29:52+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 228 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Steve Winslow Reviewed-by: Richard Fontana Reviewed-by: Alexios Zavras Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.107155473@linutronix.de Signed-off-by: Greg Kroah-Hartman

clocksource/drivers/timer-of: Don't request the resource by name

2018-01-08T16:57:24+00:00

When the driver does not specify a name for the resource, don't use of_io_request_and_map() but of_iomap(). That prevents resource name allocation conflicts on some platforms which have the same name as the node. Tested-by: Benjamin Gaignard Signed-off-by: Daniel Lezcano Acked-by: Benjamin Gaignard Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1515418139-23276-10-git-send-email-daniel.lezcano@linaro.org Signed-off-by: Ingo Molnar