kernel/linux.git/drivers/pwm, branch linux-4.16.y

pwm: mediatek: Improve precision in rate calculation

2018-04-24T07:43:05+00:00

commit 04c0a4e00dc11fedc0b0a8593adcf0f4310505d4 upstream. Add a way that turning resolution from in nanosecond into in picosecond to improve noticeably almost 4.5% precision. It's necessary to hold the new resolution with type u64 and thus related operations on u64 are applied instead in those rate calculations. And the patch has a dependency on [1]. [1] http://lists.infradead.org/pipermail/linux-mediatek/2018-March/012225.html Cc: stable@vger.kernel.org Fixes: caf065f8fd58 ("pwm: Add MediaTek PWM support") Signed-off-by: Sean Wang Signed-off-by: Thierry Reding Signed-off-by: Greg Kroah-Hartman

pwm: mediatek: Fix up PWM4 and PWM5 malfunction on MT7623

2018-04-24T07:43:05+00:00

commit 360cc036563db27881ce08049f69138438f2ddd0 upstream. Since the offset for both registers, PWMDWIDTH and PWMTHRES, used to control PWM4 or PWM5 are distinct from the other PWMs, whose wrong programming on PWM hardware causes waveform cannot be output as expected. Thus, the patch adds the extra condition for fixing up the weird case to let PWM4 or PWM5 able to work on MT7623. v1 -> v2: use pwm45_fixup naming instead of pwm45_quirk v2 -> v3: add more tags for Reviewed-by, Fixes, and Cc stable Cc: stable@vger.kernel.org Fixes: caf065f8fd58 ("pwm: Add MediaTek PWM support") Signed-off-by: Sean Wang Reviewed-by: Matthias Brugger Cc: Zhi Mao Cc: John Crispin Cc: Matthias Brugger Signed-off-by: Thierry Reding Signed-off-by: Greg Kroah-Hartman

pwm: rcar: Fix a condition to prevent mismatch value setting to duty

2018-04-24T07:43:04+00:00

commit 6225f9c64b40bc8a22503e9cda70f55d7a9dd3c6 upstream. This patch fixes an issue that is possible to set mismatch value to duty for R-Car PWM if we input the following commands: # cd /sys/class/pwm// # echo 0 > export # cd pwm0 # echo 30 > period # echo 30 > duty_cycle # echo 0 > duty_cycle # cat duty_cycle 0 # echo 1 > enable --> Then, the actual duty_cycle is 30, not 0. So, this patch adds a condition into rcar_pwm_config() to fix this issue. Signed-off-by: Ryo Kodama [shimoda: revise the commit log and add Fixes and Cc tags] Fixes: ed6c1476bf7f ("pwm: Add support for R-Car PWM Timer") Cc: Cc: # v4.4+ Signed-off-by: Yoshihiro Shimoda Signed-off-by: Thierry Reding Signed-off-by: Greg Kroah-Hartman

pwm: meson: Add clock source configuration for Meson-AXG

2017-12-05T08:51:36+00:00

For PWM controller in the Meson-AXG SoC, the EE domain and AO domain have different clock sources. This patch tries to describe them in the DT compatible data. Signed-off-by: Jian Hu Signed-off-by: Yixun Lan Signed-off-by: Thierry Reding

pwm: stmpe: Fix wrong register offset for hwpwm=2 case

2017-12-05T08:33:05+00:00

Fix trivial copy/paste bug. Signed-off-by: Axel Lin Reviewed-by: Linus Walleij Fixes: ef1f09eca74a ("pwm: Add a driver for the STMPE PWM") Signed-off-by: Thierry Reding

pwm: Set class for exported channels in sysfs

2017-12-05T08:24:58+00:00

Notifications for devices without bus or class set get dropped by dev_uevent_filter(). Adding the class to the exported child matches what the GPIO subsystem is doing. With this change exporting a channel triggers a udev event, which gives userspace a chance to fixup permissions and makes it possible for non-root users to make use of the PWM subsystem. Signed-off-by: Gottfried Haider CC: Thierry Reding CC: H Hartley Sweeten CC: linux-pwm@vger.kernel.org CC: linux-arm-kernel@lists.infradead.org CC: linux-rpi-kernel@lists.infradead.org Signed-off-by: Thierry Reding

Merge tag 'pwm/for-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm

2017-11-23T07:09:18+00:00

Pull pwm updates from Thierry Reding: "The changes for this release include power management improvements for the pwm-img driver, support for the backup mode on pwm-atmel-tcb as well as support for more hardware with the R-Car and Mediatek drivers. To round things off there's a bit of cleanup for sunxi and stm32-lp" * tag 'pwm/for-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: pwm: stm32-lp: Remove pwm_is_enabled() check before calling pwm_disable() pwm: mediatek: Add MT2712/MT7622 support pwm: sunxi: Use of_device_get_match_data() pwm: atmel-tcb: Support backup mode dt-bindings: pwm: Add R-Car D3 device tree bindings pwm: img: Add runtime PM pwm: img: Add suspend / resume handling

pwm: stm32-lp: Remove pwm_is_enabled() check before calling pwm_disable()

2017-11-15T10:02:06+00:00

The same checking is done by the implementation of pwm_disable(). Signed-off-by: Axel Lin Acked-by: Fabrice Gasnier Signed-off-by: Thierry Reding

pwm: mediatek: Add MT2712/MT7622 support

2017-11-15T09:57:53+00:00

Add support for MT2712 and MT7622. Due to register offset address of pwm7 for MT2712 is not fixed 0x40, add mtk_pwm_reg_offset array for PWM register offset. Reviewed-by: Claudiu Beznea Reviewed-by: Matthias Brugger Signed-off-by: Zhi Mao Signed-off-by: Thierry Reding

pwm: sunxi: Use of_device_get_match_data()

2017-11-15T09:56:55+00:00

The usage of of_device_get_match_data reduce the code size a bit. Furthermore, it prevents an improbable dereference when of_match_device() returns NULL. Signed-off-by: Corentin Labbe Signed-off-by: Thierry Reding