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* Merge tag 'pwm/for-4.17-rc1' of ↵Linus Torvalds2018-04-1411-56/+161
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm Pull pwm updates from Thierry Reding: "This set of changes adds support for more generations of the RCar controller as well as runtime PM support. The JZ4740 driver gains support for device tree and can now be used on all Ingenic SoCs. Rounding things off is a random assortment of fixes and cleanups all across the board" * tag 'pwm/for-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (29 commits) pwm: rcar: Add suspend/resume support pwm: rcar: Use PM Runtime to control module clock dt-bindings: pwm: rcar: Add bindings for R-Car M3N support pwm: rcar: Fix a condition to prevent mismatch value setting to duty pwm: sysfs: Use put_device() instead of kfree() dt-bindings: pwm: sunxi: Add new compatible strings pwm: sun4i: Simplify controller mapping pwm: sun4i: Drop unused .has_rdy member pwm: sun4i: Properly check current state pwm: Remove depends on AVR32 pwm: stm32: LPTimer: Use 3 cells ->of_xlate() dt-bindings: pwm-stm32-lp: Add #pwm-cells pwm: stm32: Protect common prescaler for all channels pwm: stm32: Remove unused struct device pwm: mediatek: Improve precision in rate calculation pwm: mediatek: Remove redundant MODULE_ALIAS entries pwm: mediatek: Fix up PWM4 and PWM5 malfunction on MT7623 pwm: jz4740: Enable for all Ingenic SoCs pwm: jz4740: Add support for devicetree pwm: jz4740: Implement ->set_polarity() ...
| * pwm: rcar: Add suspend/resume supportYoshihiro Shimoda2018-03-281-0/+42
| | | | | | | | | | | | | | This patch adds suspend/resume support for Renesas PWM driver. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: rcar: Use PM Runtime to control module clockHien Dang2018-03-281-6/+2
| | | | | | | | | | | | | | | | | | | | | | Runtime PM API (pm_runtime_get_sync/pm_runtime_put) should be used to control module clock instead of clk_prepare_enable and clk_disable_unprepare. Signed-off-by: Hien Dang <hien.dang.eb@renesas.com> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: rcar: Fix a condition to prevent mismatch value setting to dutyRyo Kodama2018-03-281-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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/<pwmchip>/ # 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 <ryo.kodama.vz@renesas.com> [shimoda: revise the commit log and add Fixes and Cc tags] Fixes: ed6c1476bf7f ("pwm: Add support for R-Car PWM Timer") Cc: Cc: <stable@vger.kernel.org> # v4.4+ Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: sysfs: Use put_device() instead of kfree()Arvind Yadav2018-03-281-1/+2
| | | | | | | | | | | | | | | | | | Never directly free @dev after calling device_register(), even if it returned an error! Always use put_device() to give up the reference initialized. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: sun4i: Simplify controller mappingAndre Przywara2018-03-281-18/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | At the moment we assign our supported compatible strings to a respective instance of our sun4i_pwm_data structure, even though some of them are the same. To avoid further clutter, split out the three different combinations of features we have at the moment and name them accordingly. This should make it more obvious which compatible string to use for new SoCs. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: sun4i: Drop unused .has_rdy memberAndre Przywara2018-03-281-6/+0
| | | | | | | | | | | | | | | | | | | | | | Commit a054c4d68408 ("pwm: sun4i: Drop legacy callbacks") dropped the only user of the .has_rdy member in our sun4i_pwm_data struct. Consequently we don't need to store this anymore for the various SoCs, which paves the way for further simplifications. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: sun4i: Properly check current stateAlexandre Belloni2018-03-281-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | Correctly extract the prescaler value from CTRL_REG before comparing it to PWM_PRESCAL_MASK. Also, check that both PWM_CLK_GATING and PWM_EN to ensure the PWM is enabled instead of relying on only one of those. Fixes: 93e0dfb2c52f ("pwm: sun4i: Improve hardware read out") Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: Remove depends on AVR32Corentin Labbe2018-03-281-1/+1
| | | | | | | | | | | | | | AVR32 is gone, so no more need to depend on it. Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: stm32: LPTimer: Use 3 cells ->of_xlate()Gerald Baeza2018-03-281-0/+2
| | | | | | | | | | | | | | | | | | STM32 Low-Power Timer supports generic 3 cells PWM to encode PWM number, period and polarity. Signed-off-by: Gerald Baeza <gerald.baeza@st.com> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: stm32: Protect common prescaler for all channelsFabrice Gasnier2018-03-281-1/+17
| | | | | | | | | | | | | | | | | | | | | | There may be a race, when configuring two PWM channels, with different prescaler values, when there's no active channel yet. Add mutex lock to avoid concurrent access on PWM apply state. This is also precursor patch for PWM capture support. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Reviewed-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: stm32: Remove unused struct deviceFabrice Gasnier2018-03-281-1/+0
| | | | | | | | | | | | | | | | | | dev is never assigned or used. Remove it. Fixes: 7edf7369205b ("pwm: Add driver for STM32 plaftorm") Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Reviewed-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: mediatek: Improve precision in rate calculationSean Wang2018-03-281-5/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <sean.wang@mediatek.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: mediatek: Remove redundant MODULE_ALIAS entriesSean Wang2018-03-281-1/+0
| | | | | | | | | | | | | | | | | | | | | | MODULE_ALIAS exports information to allow the module to be auto-loaded at boot for the drivers registered using legacy platform registration. However, currently the driver is always used by DT-only platform, MODULE_ALIAS is redundant and should be removed properly. Signed-off-by: Sean Wang <sean.wang@mediatek.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: mediatek: Fix up PWM4 and PWM5 malfunction on MT7623Sean Wang2018-03-281-3/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <sean.wang@mediatek.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Cc: Zhi Mao <zhi.mao@mediatek.com> Cc: John Crispin <john@phrozen.org> Cc: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: jz4740: Enable for all Ingenic SoCsPaul Cercueil2018-03-281-3/+3
| | | | | | | | | | | | | | | | | | | | This driver works perfectly with all the versions of the SoCs from Ingenic that are supported upstream. This makes the driver usable on JZ4740, JZ4770 and JZ4780 SoCs. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: jz4740: Add support for devicetreePaul Cercueil2018-03-281-0/+14
| | | | | | | | | | | | | | | | Add support for probing the pwm-jz4740 directly from devicetree. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: jz4740: Implement ->set_polarity()Paul Cercueil2018-03-281-0/+19
| | | | | | | | | | | | | | | | This permits clients of this driver to specify the polarity to use for their PWM channel. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: jz4740: Make disable operation compatible with TCU2 modeMaarten ter Huurne2018-03-281-1/+7
| | | | | | | | | | | | | | | | | | | | On the JZ4750 and later SoCs, channel 1 and 2 operate in a different way (TCU2 mode) as the other channels. If a TCU2 mode counter is stopped before its PWM functionality is disabled, the output is not guaranteed to return to the initial level. Signed-off-by: Maarten ter Huurne <maarten@treewalker.org> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: imx: Let PWM be active during suspendFabio Estevam2018-03-281-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On a imx6q-cubox-i board, which has an LED driven by PWM, when the system goes into suspend the PWM block is disabled by default, then the PWM pin goes to logic level zero and turn on the LED during suspend, which is not really the behaviour we want to see. By keeping the PWM enabled during suspend via STOPEN bit, the pwm-leds driver sets the brightness to zero in suspend and then the LED is turned off as expected. So always set the STOPEN to fix the PWM behaviour in suspend. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: atmel-tcb: Delete an error message for a failed memory allocationMarkus Elfring2018-03-271-1/+0
| | | | | | | | | | | | | | | | | | Omit an extra message for a memory allocation failure in this function. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: puv3: Delete an error message for a failed memory allocationMarkus Elfring2018-03-271-3/+1
| | | | | | | | | | | | | | | | | | Omit an extra message for a memory allocation failure in this function. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: stm32: Adopt SPDX identifierBenjamin Gaignard2018-03-272-4/+2
| | | | | | | | | | | | | | | | | | Add SPDX identifier to make it easier to determine the license of the file. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> Acked-by: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
* | Merge tag 'armsoc-soc' of ↵Linus Torvalds2018-04-061-26/+42
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC platform updates from Arnd Bergmann: "This release brings up a new platform based on the old ARM9 core: the Nuvoton NPCM is used as a baseboard management controller, competing with the better known ASpeed AST2xx series. Another important change is the addition of ARMv7-A based chips in mach-stm32. The older parts in this platform are ARMv7-M based microcontrollers, now they are expanding to general-purpose workloads. The other changes are the usual defconfig updates to enable additional drivers, lesser bugfixes. The largest updates as often are the ongoing OMAP cleanups, but we also have a number of changes for the older PXA and davinci platforms this time. For the Renesas shmobile/r-car platform, some new infrastructure is needed to make the watchdog work correctly. Supporting Multiprocessing on Allwinner A80 required a significant amount of new code, but is not doing anything unexpected" * tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (179 commits) arm: npcm: modify configuration for the NPCM7xx BMC. MAINTAINERS: update entry for ARM/berlin ARM: omap2: fix am43xx build without L2X0 ARM: davinci: da8xx: simplify CFGCHIP regmap_config ARM: davinci: da8xx: fix oops in USB PHY driver due to stack allocated platform_data ARM: multi_v7_defconfig: add NXP FlexCAN IP support ARM: multi_v7_defconfig: enable thermal driver for i.MX devices ARM: multi_v7_defconfig: add RN5T618 PMIC family support ARM: multi_v7_defconfig: add NXP graphics drivers ARM: multi_v7_defconfig: add GPMI NAND controller support ARM: multi_v7_defconfig: add OCOTP driver for NXP SoCs ARM: multi_v7_defconfig: configure I2C driver built-in arm64: defconfig: add CONFIG_UNIPHIER_THERMAL and CONFIG_SNI_AVE ARM: imx: fix imx6sll-only build ARM: imx: select ARM_CPU_SUSPEND for CPU_IDLE as well ARM: mxs_defconfig: Re-sync defconfig ARM: imx_v4_v5_defconfig: Use the generic fsl-asoc-card driver ARM: imx_v4_v5_defconfig: Re-sync defconfig arm64: defconfig: enable stmmac ethernet to defconfig ARM: EXYNOS: Simplify code in coupled CPU idle hot path ...
| * | pwm: pwm-omap-dmtimer: Adapt driver to utilize dmtimer pdata opsKeerthy2018-02-221-26/+42
| |/ | | | | | | | | | | | | | | | | Adapt driver to utilize dmtimer pdata ops instead of pdata-quirks. Signed-off-by: Keerthy <j-keerthy@ti.com> Acked-by: Neil Armstrong <narmstrong@baylibre.com> Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* | pwm: remove pwm-bfin driverArnd Bergmann2018-03-263-167/+0
| | | | | | | | | | | | | | | | | | The blackfin architecture is getting removed, so this driver is now obsolete as well. Acked-by: Thierry Reding <thierry.reding@gmail.com> Acked-by: Aaron Wu <aaron.wu@analog.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* | treewide: simplify Kconfig dependencies for removed archsArnd Bergmann2018-03-261-1/+1
|/ | | | | | | | | | A lot of Kconfig symbols have architecture specific dependencies. In those cases that depend on architectures we have already removed, they can be omitted. Acked-by: Kalle Valo <kvalo@codeaurora.org> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* pwm: meson: Add clock source configuration for Meson-AXGJian Hu2017-12-051-0/+26
| | | | | | | | | | 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 <jian.hu@amlogic.com> Signed-off-by: Yixun Lan <yixun.lan@amlogic.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
* pwm: stmpe: Fix wrong register offset for hwpwm=2 caseAxel Lin2017-12-051-1/+1
| | | | | | | | | Fix trivial copy/paste bug. Signed-off-by: Axel Lin <axel.lin@ingics.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Fixes: ef1f09eca74a ("pwm: Add a driver for the STMPE PWM") Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
* pwm: Set class for exported channels in sysfsGottfried Haider2017-12-051-0/+1
| | | | | | | | | | | | | | | | | | 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 <gottfried.haider@gmail.com> CC: Thierry Reding <thierry.reding@gmail.com> CC: H Hartley Sweeten <hsweeten@visionengravers.com> 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 <thierry.reding@gmail.com>
* Merge tag 'pwm/for-4.15-rc1' of ↵Linus Torvalds2017-11-235-36/+251
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm 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()Axel Lin2017-11-151-2/+1
| | | | | | | | | | | | | | | | The same checking is done by the implementation of pwm_disable(). Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: mediatek: Add MT2712/MT7622 supportZhi Mao2017-11-151-9/+44
| | | | | | | | | | | | | | | | | | | | | | 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 <claudiu.beznea@microchip.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Zhi Mao <zhi.mao@mediatek.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: sunxi: Use of_device_get_match_data()Corentin Labbe2017-11-151-4/+4
| | | | | | | | | | | | | | | | | | 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 <clabbe.montjoie@gmail.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: atmel-tcb: Support backup modeRomain Izard2017-11-151-2/+61
| | | | | | | | | | | | | | | | | | Save and restore registers for the PWM on suspend and resume, which makes hibernation and backup modes possible. Signed-off-by: Romain Izard <romain.izard.pro@gmail.com> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: img: Add runtime PMEd Blake2017-11-151-37/+95
| | | | | | | | | | | | | | Add runtime PM to disable the clocks when the h/w is not in use. Signed-off-by: Ed Blake <ed.blake@sondrel.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: img: Add suspend / resume handlingEd Blake2017-11-151-1/+65
| | | | | | | | | | | | | | | | | | The power may be disabled during suspend, so implement suspend and resume callbacks to save and restore register state. Signed-off-by: Ed Blake <ed.blake@sondrel.com> [thierry.reding@gmail.com: guard using PM_SLEEP instead of PM] Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
* | License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman2017-11-021-0/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Merge tag 'pwm/for-4.14-rc1' of ↵Linus Torvalds2017-09-1115-301/+660
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm Pull pwm updates from Thierry Reding: "The changes for this release include a new driver for the PWM controller found on SoCs of the ZTX ZX family. Support for an old SH-Mobile SoC has been dropped and the Rockchip and MediaTek drivers gain support for more generations. Other than that there are a bunch of coding style fixes, minor bug fixes and cleanup as well as documentation patches" * tag 'pwm/for-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (32 commits) pwm: pwm-samsung: fix suspend/resume support pwm: samsung: Remove redundant checks from pwm_samsung_config() pwm: mediatek: Disable clock on PWM configuration failure dt-bindings: pwm: Add MT2712/MT7622 information pwm: mediatek: Fix clock control issue pwm: mediatek: Fix PWM source clock selection pwm: mediatek: Fix Kconfig description pwm: tegra: Explicitly request exclusive reset control pwm: hibvt: Explicitly request exclusive reset control pwm: tiehrpwm: Set driver data before runtime PM enable pwm: tiehrpwm: Miscellaneous coding style fixups pwm: tiecap: Set driver data before runtime PM enable pwm: tiecap: Miscellaneous coding style fixups dt-bindings: pwm: tiecap: Add TI 66AK2G SoC specific compatible pwm: tiehrpwm: fix clock imbalance in probe error path pwm: tiehrpwm: Fix runtime PM imbalance at unbind pwm: Kconfig: Enable pwm-tiecap to be built for Keystone pwm: Add ZTE ZX PWM device driver dt-bindings: pwm: Add bindings doc for ZTE ZX PWM controller pwm: bcm2835: Support for polarity setting via DT ...
| * pwm: pwm-samsung: fix suspend/resume supportBartlomiej Zolnierkiewicz2017-08-211-32/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix suspend/resume support: - add disabled_mask to struct samsung_pwm_chip to track PWM disabled state information in pwm_samsung_{disable,enable}() - rename pwm_samsung_config() to __pwm_samsung_config() and add extra force_period parameter to be used during resume (to force tin_ns and tcnt recalculation) - add pwm_samsung_config() wrapper for preserving old behavior - properly restore PWM configuration in pwm_samsung_resume() - remove no longer needed pwm_samsung_suspend() - update Copyrights Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: samsung: Remove redundant checks from pwm_samsung_config()Bartlomiej Zolnierkiewicz2017-08-211-3/+0
| | | | | | | | | | | | | | | | | | | | If the requested period_ns and duty_ns values are identical to the last programmed ones pwm_samsung_config() returns early and skips the hardware configuration. The same checks are now done by the PWM core so the driver specific ones can be removed. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: mediatek: Disable clock on PWM configuration failureZhi Mao2017-08-211-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | Make sure to disable the PWM clock if the PWM cannot be configured due to the clock divider exceeding the maximum value. While at it, replace the hardcoded maximum clock divider with a defined constant to improve code readability. Signed-off-by: Zhi Mao <zhi.mao@mediatek.com> Acked-by: John Crispin <john@phrozen.org> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: mediatek: Fix clock control issueZhi Mao2017-08-211-22/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to save some power, do not prepare the top and main clocks during mtk_pwm_probe(). Instead, prepare the clocks only when necessary and also make sure to enable the clocks to match the semantics of the common clock framework. While at it, don't explicitly disable all PWM channels in ->remove() because all users should have done that already. Signed-off-by: Zhi Mao <zhi.mao@mediatek.com> Acked-by: John Crispin <john@phrozen.org> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: mediatek: Fix PWM source clock selectionZhi Mao2017-08-211-1/+1
| | | | | | | | | | | | | | | | | | | | In original code, the PWM output frequency is not correct when set bit<3>=1 to PWMCON register. Signed-off-by: Zhi Mao <zhi.mao@mediatek.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Acked-by: John Crispin <john@phrozen.org> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: mediatek: Fix Kconfig descriptionZhi Mao2017-08-211-1/+1
| | | | | | | | | | | | | | | | | | Fix a copy/paste error that sneaked into the Kconfig description of the Mediatek PWM driver. Signed-off-by: Zhi Mao <zhi.mao@mediatek.com> Acked-by: John Crispin <john@phrozen.org> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: tegra: Explicitly request exclusive reset controlPhilipp Zabel2017-08-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting reset lines") started to transition the reset control request API calls to explicitly state whether the driver needs exclusive or shared reset control behavior. Convert all drivers requesting exclusive resets to the explicit API call so the temporary transition helpers can be removed. No functional changes. Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Jonathan Hunter <jonathanh@nvidia.com> Cc: linux-pwm@vger.kernel.org Cc: linux-tegra@vger.kernel.org Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: hibvt: Explicitly request exclusive reset controlPhilipp Zabel2017-08-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting reset lines") started to transition the reset control request API calls to explicitly state whether the driver needs exclusive or shared reset control behavior. Convert all drivers requesting exclusive resets to the explicit API call so the temporary transition helpers can be removed. No functional changes. Cc: Thierry Reding <thierry.reding@gmail.com> Cc: linux-pwm@vger.kernel.org Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: tiehrpwm: Set driver data before runtime PM enableThierry Reding2017-08-211-1/+1
| | | | | | | | | | | | | | | | | | Runtime PM callbacks can be run right after runtime PM is enabled, so make sure to set the driver data before that. This is unlikely to ever happen with the current driver, but it doesn't hurt to follow best practices anyway. Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: tiehrpwm: Miscellaneous coding style fixupsThierry Reding2017-08-211-50/+62
| | | | | | | | | | | | | | | | I noticed most of these while reviewing another patch and thought I'd fix them while at it. These are mostly changes to make variable types more strict and whitespace fixups. Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
| * pwm: tiecap: Set driver data before runtime PM enableThierry Reding2017-08-211-1/+1
| | | | | | | | | | | | | | | | | | Runtime PM callbacks can be run right after runtime PM is enabled, so make sure to set the driver data before that. This is unlikely to ever happen with the current driver, but it doesn't hurt to follow best practices anyway. Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 23:47:34 +0100