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Clemens Gruber 8d254a340e pwm: pca9685: Fix period change with same duty cycle 
When first implementing support for changing the output frequency, an
optimization was added to continue the PWM after changing the prescaler
without having to reprogram the ON and OFF registers for the duty cycle,
in case the duty cycle stayed the same. This was flawed, because we
compared the absolute value of the duty cycle in nanoseconds instead of
the ratio to the period.

Fix the problem by removing the shortcut.

Fixes: 01ec8472009c9 ("pwm-pca9685: Support changing the output frequency")
Cc: <stable@vger.kernel.org> # v4.3+
Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2017-01-20 07:43:22 +01:00
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accessibility
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acpi
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
amba
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android
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ata
Merge branch 'for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
2016-12-13 15:30:50 -08:00
atm
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
auxdisplay
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base
avoid spurious "may be used uninitialized" warning
2016-12-25 14:56:58 -08:00
bcma
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block
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
bluetooth
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-12-16 10:24:44 -08:00
bus
cpu/hotplug: Cleanup state names
2016-12-25 10:47:44 +01:00
cdrom
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
char
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
clk
Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
2016-12-15 16:06:15 -08:00
clocksource
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-25 14:30:04 -08:00
connector
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cpufreq
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
cpuidle
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
crypto
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2016-12-27 17:51:36 -08:00
dax
libnvdimm for 4.10
2016-12-18 15:49:10 -08:00
dca
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devfreq
devfreq: rk3399_dmc: Don't use OPP structures outside of RCU locks
2016-12-08 01:46:07 +01:00
dio
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
dma
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
dma-buf
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edac
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
eisa
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extcon
sound updates for 4.10-rc1
2016-12-14 11:14:28 -08:00
firewire
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firmware
firmware: dmi_scan: Always show system identification string
2016-12-19 10:01:47 +01:00
fmc
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fpga
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gpio
- New Device Support
2016-12-19 08:16:26 -08:00
gpu
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
hid
Merge branches 'for-4.10/asus', 'for-4.10/cp2112', 'for-4.10/i2c-hid-nopower', 'for-4.10/intel-ish', 'for-4.10/mayflash', 'for-4.10/microsoft-surface-3', 'for-4.10/multitouch', 'for-4.10/sony', 'for-4.10/udraw-ps3', 'for-4.10/upstream' and 'for-4.10/wacom/generic' into for-linus
2016-12-14 10:12:26 +01:00
hsi
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hv
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
hwmon
hwmon: (g762) Fix overflows and crash seen when writing limit attributes
2016-12-12 11:33:44 -08:00
hwspinlock
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hwtracing
coresight/etm3/4x: Consolidate hotplug state space
2016-12-25 10:47:44 +01:00
i2c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
ide
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
idle
Power management material for v4.10-rc1
2016-12-13 10:41:53 -08:00
iio
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
infiniband
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
input
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
iommu
More ACPI updates for v4.10-rc1
2016-12-22 10:19:32 -08:00
ipack
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irqchip
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-25 14:30:04 -08:00
isdn
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
leds
cpu/hotplug: Cleanup state names
2016-12-25 10:47:44 +01:00
lguest
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
lightnvm
Char/Misc driver patches for 4.10-rc1
2016-12-13 12:11:01 -08:00
macintosh
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
mailbox
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
mcb
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md
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
media
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
memory
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memstick
Merge branch 'for-4.10/block' of git://git.kernel.dk/linux-block
2016-12-13 10:19:16 -08:00
message
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
mfd
- New Device Support
2016-12-19 08:16:26 -08:00
misc
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
mmc
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
mtd
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
net
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-12-27 16:04:37 -08:00
nfc
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ntb
ntb_transport: Remove unnecessary call to ntb_peer_spad_read
2016-12-23 16:11:07 -05:00
nubus
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
nvdimm
libnvdimm for 4.10
2016-12-18 15:49:10 -08:00
nvme
nvme : Use correct scnprintf in cmb show
2016-12-19 08:35:24 -07:00
nvmem
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of
pci-v4.10-changes
2016-12-15 12:46:48 -08:00
oprofile
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
parisc
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
parport
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
pci
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
pcmcia
drivers/pcmcia/m32r_pcc.c: check return from add_pcc_socket
2016-12-12 18:55:06 -08:00
perf
cpu/hotplug: Cleanup state names
2016-12-25 10:47:44 +01:00
phy
SCSI misc on 20161213
2016-12-14 10:49:33 -08:00
pinctrl
ARM: DT updates for v4.10
2016-12-15 15:50:24 -08:00
platform
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
pnp
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
power
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
powercap
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pps
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ps3
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ptp
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-12 19:56:15 -08:00
pwm
pwm: pca9685: Fix period change with same duty cycle
2017-01-20 07:43:22 +01:00
rapidio
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ras
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regulator
- New Device Support
2016-12-19 08:16:26 -08:00
remoteproc
remoteproc: qcom_adsp_pil: select qcom_scm
2016-12-09 16:16:56 -08:00
reset
ARM: SoC driver updates for v4.10
2016-12-15 16:03:25 -08:00
rpmsg
rpmsg updates for v4.10
2016-12-13 08:52:45 -08:00
rtc
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
s390
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
sbus
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
scsi
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-25 14:30:04 -08:00
sfi
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sh
lib: radix-tree: check accounting of existing slot replacement users
2016-12-12 18:55:08 -08:00
sn
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soc
powerpc updates for 4.10
2016-12-16 09:26:42 -08:00
spi
dmaengine updates for 4.10-rc1
2016-12-14 20:42:45 -08:00
spmi
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ssb
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staging
staging/lustre/libcfs: Convert to hotplug state machine
2016-12-25 10:47:43 +01:00
target
Merge branch 'scsi-target-for-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/bvanassche/linux
2016-12-21 10:16:05 -08:00
tc
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thermal
Power management material for v4.10-rc1
2016-12-13 10:41:53 -08:00
thunderbolt
Char/Misc driver patches for 4.10-rc1
2016-12-13 12:11:01 -08:00
tty
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
uio
uio-hv-generic: store physical addresses instead of virtual
2016-12-10 14:57:58 +01:00
usb
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
uwb
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vfio
powerpc updates for 4.10
2016-12-16 09:26:42 -08:00
vhost
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-12-16 10:24:44 -08:00
video
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
virt
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virtio
virtio_mmio: Set dev.release() to avoid warning
2016-12-16 00:13:39 +02:00
vlynq
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vme
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w1
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watchdog
Watchdog updates for v4.10
2016-12-24 11:27:45 -08:00
xen
cpu/hotplug: Cleanup state names
2016-12-25 10:47:44 +01:00
zorro
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
Kconfig
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Makefile
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