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Filename Latest commit message Latest commit date
Uwe Kleine-König f6c3b7a4ce leds: pwm: Don't disable the PWM when the LED should be off 
[ Upstream commit 76fe464c8e64e71b2e4af11edeef0e5d85eeb6aa ]

Disabling a PWM (i.e. calling pwm_apply_state with .enabled = false)
gives no guarantees what the PWM output does. It might freeze where it
currently is, or go in a High-Z state or drive the active or inactive
state, it might even continue to toggle.

To ensure that the LED gets really disabled, don't disable the PWM even
when .duty_cycle is zero.

This fixes disabling a leds-pwm LED on i.MX28. The PWM on this SoC is
one of those that freezes its output on disable, so if you disable an
LED that is full on, it stays on. If you disable a LED with half
brightness it goes off in 50% of the cases and full on in the other 50%.

Fixes: 41c42ff5db ("leds: simple driver for pwm driven LEDs")
Reported-by: Rogan Dawes <rogan@dawes.za.net>
Reported-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Link: https://lore.kernel.org/r/20230922192834.1695727-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Lee Jones <lee@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-11-20 10:30:13 +01:00
arch sh: bios: Revive earlyprintk support 2023-11-20 10:30:13 +01:00
block block/partition: fix signedness issue for Amiga partitions 2023-07-27 08:37:29 +02:00
certs
crypto X.509: if signature is unsupported skip validation 2023-09-23 10:59:55 +02:00
Documentation firmware: ti_sci: Replace HTTP links with HTTPS ones 2023-11-20 10:30:12 +01:00
drivers leds: pwm: Don't disable the PWM when the LED should be off 2023-11-20 10:30:13 +01:00
fs ext4: move 'ix' sanity check to corrent position 2023-11-20 10:30:12 +01:00
include sched/rt: Provide migrate_disable/enable() inlines 2023-11-20 10:30:12 +01:00
init x86/mm: Initialize text poking earlier 2023-08-08 19:56:36 +02:00
ipc
kernel genirq/matrix: Exclude managed interrupts in irq_matrix_allocated() 2023-11-20 10:30:08 +01:00
lib kobject: Fix slab-out-of-bounds in fill_kobj_path() 2023-11-08 11:23:38 +01:00
LICENSES
mm vfs: fix readahead(2) on block devices 2023-11-20 10:30:08 +01:00
net ipv6: avoid atomic fragment on GSO packets 2023-11-20 10:30:10 +01:00
samples samples/bpf: Fix buffer overflow in tcp_basertt 2023-07-27 08:37:07 +02:00
scripts modpost: add missing else to the "of" check 2023-10-10 21:46:44 +02:00
security ima: rework CONFIG_IMA dependency block 2023-10-10 21:46:46 +02:00
sound ASoC: ams-delta.c: use component after check 2023-11-20 10:30:13 +01:00
tools selftests/ftrace: Add new test case which checks non unique symbol 2023-11-08 11:23:34 +01:00
usr
virt KVM: Destroy target device if coalesced MMIO unregistration fails 2023-03-11 16:44:01 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS iio: stx104: Move to addac subdirectory 2023-08-30 16:27:12 +02:00
Makefile Linux 5.4.260 2023-11-08 11:23:43 +01:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.