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path: root/drivers/pwm
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2019-03-04pwm: atmel: Remove useless symbolic definitionsThierry Reding1-14/+6
The values that these symbols define are only assigned to the per-SoC structure where the context is clear, so there's no need for the extra symbolic name. Acked-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-03-04pwm: bcm-kona: Update macros to remove braces around numbersSheetal Tigadoli1-8/+8
Parentheses are not needed around integer literals in macros. Remove them. Signed-off-by: Sheetal Tigadoli <sheetal.tigadoli@broadcom.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-03-04pwm: imx27: Only enable the clocks once in .get_state()Uwe Kleine-König1-7/+4
Currently the function pwm_imx27_get_state() of enables the clocks once unconditionally at the start, a second time if the PWM is enabled and disables unconditionally at the end. Simplify that to enable once at the start and disable conditionally at the end. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-03-04pwm: rcar: Improve calculation of dividerYoshihiro Shimoda1-9/+7
The rcar_pwm_get_clock_division() has a loop to calculate the divider, but the value of div should be calculatable without a loop. So, this patch improves it. This algorithm is suggested by Uwe Kleine-König and Laurent Pinchart. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-03-04pwm: rcar: Remove legacy APIsYoshihiro Shimoda1-40/+4
This patch removes legacy APIs. Since rcar_pwm_{en,dis}able() functions are reused on "atomic" API, this patch changes the arguments of these functions. No change in behavior. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-03-04pwm: rcar: Use "atomic" API on rcar_pwm_resume()Yoshihiro Shimoda1-5/+3
To remove legacy API related functions in the future, this patch uses "atomic" related function instead. No change in behavior. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-03-04pwm: rcar: Add support "atomic" APIYoshihiro Shimoda1-0/+37
This patch adds support for "atomic" API. This behavior differs with legacy APIs a little. Legacy APIs: The PWMCNT register will be updated in rcar_pwm_config() even if the PWM state is disabled. Atomic API: The PWMCNT register will be updated in rcar_pwm_apply() only if the PWM state is enabled. Otherwize, if a PWM runs with 30% duty cycles and the pwm_apply_state() is called with state->enabled = 0, ->duty_cycle = 60 and ->period = 100, this is possible to output a 60% duty cycle. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-03-04pwm: atmel: Add support for SAM9X60's PWM controllerClaudiu Beznea1-0/+19
Add support for SAM9X60's PWM controller. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-03-04pwm: atmel: Rename objects of type atmel_pwm_dataClaudiu Beznea1-7/+7
Rename objects of type atmel_pwm_data to contain chip name instead of version number. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-03-04pwm: atmel: Add support for controllers with 32 bit countersClaudiu Beznea1-11/+23
SAM9X60's PWM controller uses 32 bits counters thus it could generate signals with higher period and duty cycles than the old ones. Prepare the current driver to be able to work with old controllers (that uses 16 bits counters) and with the new SAM9X60's controller, by providing counters information based on compatible string. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-03-04pwm: atmel: Add struct atmel_pwm_dataClaudiu Beznea1-28/+36
Add struct atmel_pwm_data to embed different per controller information. It prepares adding support for another similar controller that needs additional information. At this stage, embed a member of type struct atmel_pwm_registers in it. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-03-04pwm: Add MediaTek MT8183 display PWM driver supportJitao Shi1-0/+11
Use the mtk_pwm_data struction to define different registers and add MT8183 specific register operations, such as MT8183 doesn't have commit register, needs to disable double buffer before writing register, and needs to select commit mode and use PWM_PERIOD/PWM_HIGH_WIDTH. Signed-off-by: Jitao Shi <jitao.shi@mediatek.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-03-04pwm: hibvt: Add hi3559v100 supportMathieu Othacehe1-1/+26
Add support for the hi3559v100-shub-pwm and hisilicon,hi3559v100-pwm platforms. They require a special quirk: the PWM has to be enabled twice to force a duty_cycle refresh. Signed-off-by: Mathieu Othacehe <m.othacehe@gmail.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-03-04pwm: hibvt: Use individual struct per of-dataMathieu Othacehe1-5/+12
Split pwm_soc array in one struct per SoC and point to the corresponding one in of-data. Signed-off-by: Mathieu Othacehe <m.othacehe@gmail.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-01-16pwm: imx: Signedness bug in imx_pwm_get_state()Dan Carpenter1-1/+2
"ret" only holds zero and negative error codes. It needs to be signed for the error handling to work. Fixes: 9f4c8f9607c3 ("pwm: imx: Add ipg clock operation") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-01-16pwm: imx: Split into two driversUwe Kleine-König4-153/+257
The two PWM implementations called v1 (for i.MX1 and i.MX21) and v2 (for i.MX27 and later) have nothing in common apart from needing two clocks named "per" and "ipg" and being integrated in a SoC named i.MX. So split the file containing the two disjunct drivers into two files and two complete separate drivers. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> [thierry.reding@gmail.com: fix a modular build issue] Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-01-10pwm: imx: Don't print an error on -EPROBE_DEFERUwe Kleine-König1-3/+8
When getting the peripheral clock fails with -EPROBE_DEFER the driver is usually probed again later and emitting an error message is irritating. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-01-10pwm: imx: Set driver data earlier simplifying the end of ->probe()Uwe Kleine-König1-7/+3
When ->probe() fails the driver core takes care of unsetting the driver data. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-01-10pwm: imx: Remove if block where the condition is always wrongUwe Kleine-König1-2/+0
The ->remove() callback is only called when probe returned successfully. In this case the driver data cannot be NULL. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-01-10pwm: Drop per-chip dbg_show callbackUwe Kleine-König1-4/+1
This callback was introduced in commit 62099abf67a2 ("pwm: Add debugfs interface") in 2012 and up to now there is not a single user. So drop this unused code. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> [thierry.reding@gmail.com: remove kerneldoc for ->dbg_show()] Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2019-01-10pwm: Don't use memcmp() to compare state variablesUwe Kleine-König1-1/+4
Given that struct pwm_state is sparse (at least on some platforms), variables of this type might represent the same state because all fields are pairwise identical but still memcmp() returns a difference because some of the unused bits are different. To prevent surprises compare member by member instead of the whole occupied memory. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-12-24pwm: imx: Add ipg clock operationAnson Huang1-5/+48
i.MX PWM module's ipg_clk_s is for PWM register access, on most of i.MX SoCs, this ipg_clk_s is from system ipg clock or perclk which is always enabled, but on i.MX7D, the ipg_clk_s is from PWM1_CLK_ROOT which is controlled by CCGR132, that means the CCGR132 MUST be enabled first before accessing PWM registers on i.MX7D. This patch adds ipg clock operation to make sure register access successfully on i.MX7D and it fixes Linux kernel boot up hang during PWM driver probe. Fixes: 4a23e6ee9f69 ("ARM: dts: imx7d-sdb: Restore pwm backlight support") Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-12-24pwm: clps711x: Switch to SPDX identifierAlexander Shiyan1-7/+2
Adopt the SPDX license identifier headers to ease license compliance management. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-12-24pwm: clps711x: Fix period calculationAlexander Shiyan1-2/+2
Commit e39c0df1be5a ("pwm: Introduce the pwm_args concept") has changed the variable for the period for clps711x-pwm driver, so now pwm_get/set_period() works with pwm->state.period variable instead of pwm->args.period. This patch changes the period variable in other places where it is used. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-12-24pwm: bcm2835: Switch to SPDX identifierStefan Wahren1-4/+1
Adopt the SPDX license identifier headers to ease license compliance management. Cc: Bart Tanghe <bart.tanghe@thomasmore.be> Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-12-24pwm: Enable Kona PWM to be built for the Cygnus architectureClément Péron1-1/+3
The Cygnus architecture uses a Kona PWM. This is already present in the device tree but can't be built actually. Hence, allow the Kona PWM to be built for the Cygnus architecture. Signed-off-by: Clément Péron <peron.clem@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Scott Branden <scott.branden@broadcom.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-12-12pwm: imx: Implement get_state() function for hardware readoutMichal Vokáč1-0/+53
Implement the get_state() function and set the initial state to reflect real state of the hardware. This allows to keep the PWM running if it was enabled in bootloader. It is very similar to the GPIO behavior. GPIO pin set as output in bootloader keep the same setting in Linux unless it is reconfigured. If we find the PWM block enabled we need to prepare and enable its source clock otherwise the clock will be disabled late in the boot as unused. That will leave the PWM in enabled state but with disabled clock. That has a side effect that the PWM output is left at its current level at which the clock was disabled. It is totally non-deterministic and it may be LOW or HIGH. Signed-off-by: Michal Vokáč <michal.vokac@ysoft.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-12-12pwm: imx: Use bitops and bitfield macros to define register valuesMichal Vokáč1-20/+58
Use existing macros to define register fields instead of manually shifting the bit masks. Also define some more register bits. Signed-off-by: Michal Vokáč <michal.vokac@ysoft.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-12-12pwm: imx: Sort include filesMichal Vokáč1-6/+6
Sort included header files alphabetically. Signed-off-by: Michal Vokáč <michal.vokac@ysoft.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-11-16pwm: lpc18xx-sct: Don't reconfigure PWM in .request and .freeUwe Kleine-König1-3/+0
Regarding the .request case: The consumer might be interested in taking over the configured state from the boot loader. So the initially configured state should be retained. For the free case the PWM consumer is responsible for disabling the PWM before calling pwm_put() and there are three subcases to consider: a) The PWM is already off. Then there is no gain in disabling the PWM once more. b) The PWM is still running and there is a good reason for that. (Not sure this is a valid case, I cannot imagine such a good reason.) Then it is counterproductive to disable the PWM. c) The PWM is still running because the consumer failed to disable the PWM. Then the consumer needs fixing and there is little incentive to paper over the problem in the backend driver. This aligns the lpc18xx-sct driver to the other PWM drivers that also don't reconfigure the hardware in .request and .free. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-10-16pwm: lpss: Only set update bit if we are actually changing the settingsHans de Goede1-5/+7
According to the datasheet the update bit must be set if the on-time-div or the base-unit changes. Now that we properly order device resume on Cherry Trail so that the GFX0 _PS0 method no longer exits with an error, we end up with a sequence of events where we are writing the same values twice in a row. First the _PS0 method restores the duty cycle of 0% the GPU driver set on suspend and then the GPU driver first updates just the enabled bit in the pwm_state from 0 to 1, causing us to write the same values again, before restoring the pre-suspend duty-cycle in a separate pwm_apply call. When writing the update bit the second time, without changing any of the values the update bit clears immediately / instantly, instead of staying 1 for a while as usual. After this the next setting of the update bit seems to be ignored, causing the restoring of the pre-suspend duty-cycle to not get applied. This makes the backlight come up with a 0% dutycycle after suspend/resume. Any further brightness changes after this do work. This commit moves the setting of the update bit into pwm_lpss_prepare() and only sets the bit if we have actually changed any of the values. This avoids the setting of the update bit the second time we configure the PWM to 0% dutycycle, this fixes the backlight coming up with 0% duty-cycle after a suspend/resume. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-10-16pwm: lpss: Force runtime-resume on suspend on Cherry TrailHans de Goede2-15/+16
On Cherry Trail devices under Windows the PWM controller used for the backlight is considered part of the GPU even though it is part of the LPSS block and thus is an entirely different independent hardware unit. Because of this on Cherry Trail the GPU's (GFX0 ACPI node) _PS3 and _PS0 methods save and restore the PWM controller registers. If userspace blanks the screen before suspending, such as e.g. GNOME does, then the PWM controller will be runtime-suspended when the suspend starts. This causes the GFX0 _PS? methods to save a value of 0xffffffff for the PWM control register and to restore this value on resume. 0xffffffff is not a valid value for the register and writing this causes problems such as e.g. a flickering backlight. This commit adds a prepare method to the dev_pm_ops and makes it return 0 on Cherry Trail devices forcing a runtime-resume before other device's suspend methods run. This fixes the reading and writing back of 0xffffffff. Since we now always runtime-resume the device on suspend, it will be resumed on resume too and we no longer need to check for the GFX0 _PS0 method having resumed it underneath us, so this commit removes the now no longer necessary complete dev_pm_op. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-10-16pwm: Enable TI ECAP driver for ARCH_K3Vignesh R1-3/+2
K3 devices have the same ECAP IP as OMAP SoCs. Enable driver to be built for K3 devices. Also, drop reference to AM33xx in help text, as IP is found on multiple TI SoCs. Signed-off-by: Vignesh R <vigneshr@ti.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-10-12pwm: Send a uevent on the pwmchip device upon channel sysfs (un)exportFabrice Gasnier1-0/+11
This patch sends a uevent (KOBJ_CHANGE) on the pwmchipN device, everytime a pwmX channel has been exported/unexported via sysfs. This allows udev to implement rules on such events, like: SUBSYSTEM=="pwm*", PROGRAM="/bin/sh -c '\ chown -R root:gpio /sys/class/pwm && chmod -R 770 /sys/class/pwm;\ chown -R root:gpio /sys/devices/platform/soc/*.pwm/pwm/pwmchip* && chmod -R 770 /sys/devices/platform/soc/*.pwm/pwm/pwmchip*\ '" This is a replacement patch for commit 7e5d1fd75c3d ("pwm: Set class for exported channels in sysfs"), see [1]. basic testing: $ udevadm monitor --environment & $ echo 0 > /sys/class/pwm/pwmchip0/export KERNEL[197.321736] change /devices/.../pwm/pwmchip0 (pwm) ACTION=change DEVPATH=/devices/.../pwm/pwmchip0 EXPORT=pwm0 SEQNUM=2045 SUBSYSTEM=pwm [1] https://lkml.org/lkml/2018/9/25/713 Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Tested-by: Gottfried Haider <gottfried.haider@gmail.com> Tested-by: Michal Vokáč <michal.vokac@ysoft.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-10-12Revert "pwm: Set class for exported channels in sysfs"Fabrice Gasnier1-1/+0
This reverts commit 7e5d1fd75c3dde9fc10c4472b9368089d1b81d00 ("pwm: Set class for exported channels in sysfs") as it causes regression with multiple pwm chip[1], when exporting a pwm channel (echo X > export): - ABI (Documentation/ABI/testing/sysfs-class-pwm) states pwmX should be created in /sys/class/pwm/pwmchipN/pwmX - Reverted patch causes new entry to be also created directly in /sys/class/pwm/pwmX - 1st time, exporting pwmX will create an entry in /sys/class/pwm/pwmX - class attributes are added under pwmX folder, such as export, unexport npwm, symlinks. This is wrong as it belongs to pwmchipN. It may cause bad behavior and report wrong values. - when another export happens on another pwmchip, it can't be created (e.g. -EEXIST). This is causing the issue with multiple pwmchip. Example on stm32 (stm32429i-eval) platform: $ ls /sys/class/pwm pwmchip0 pwmchip4 $ cd /sys/class/pwm/pwmchip0/ $ echo 0 > export $ ls /sys/class/pwm pwm0 pwmchip0 pwmchip4 $ cd /sys/class/pwm/pwmchip4/ $ echo 0 > export sysfs: cannot create duplicate filename '/class/pwm/pwm0' ...Exception stack follows... This is also seen on other platform [2] [1] https://lkml.org/lkml/2018/9/25/713 [2] https://lkml.org/lkml/2018/9/25/447 Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Tested-by: Gottfried Haider <gottfried.haider@gmail.com> Tested-by: Michal Vokáč <michal.vokac@ysoft.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-10-12pwm: Use SPDX identifier for Renesas driversWolfram Sang2-13/+2
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-10-12pwm: lpss: Add get_state callbackHans de Goede1-0/+34
Add a get_state callback so that the initial state correctly reflects the actual hardware state. Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-10-12pwm: lpss: Release runtime-pm reference from the driver's remove callbackHans de Goede1-0/+6
For each pwm output which gets enabled through pwm_lpss_apply(), we do a pm_runtime_get_sync(). This commit adds pm_runtime_put() calls to pwm_lpss_remove() to balance these when the driver gets removed with some of the outputs still enabled. Fixes: f080be27d7d9 ("pwm: lpss: Add support for runtime PM") Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-10-12pwm: lpss: Check PWM powerstate after resume on Cherry Trail devicesHans de Goede2-3/+24
The _PS0 method for the integrated graphics on some Cherry Trail devices (observed on a HP Pavilion X2 10-p0XX) turns on the PWM chip (puts it in D0), causing an inconsistency between the state the pm-core thinks it is in (left runtime suspended as it was before the suspend/resume) and the state it actually is in. Interestingly enough this is done on a device where the pwm controller is not used for the backlight at all, since it uses an eDP panel. On devices where the PWM is used this is not a problem since we will resume it ourselves anyways. This inconsistency causes us to never suspend the pwm controller again, which causes the device to not be able to reach S0ix states when suspended. This commit adds a resume-complete handler, which when we think the device is still run-time suspended checks the actual power-state and if necessary updates the rpm-core's internal state. This fixes the Pavilion X2 10-p0XX not reaching S0ix states when suspended. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-10-12pwm: lpss: Move struct pwm_lpss_chip definition to the header fileHans de Goede2-10/+8
Move struct pwm_lpss_chip definition from pwm-lpss.c to pwm-lpss.h, so that the pci/platform drivers can access the info member (struct pwm_lpss_boardinfo *). This is a preparation patch for adding platform specific quirks, which the drivers need access to, to pwm_lpss_boardinfo. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-10-12pwm: lpss: Add ACPI HID for second PWM controller on Cherry Trail devicesHans de Goede1-0/+1
The second PWM controller on Cherry Trail devices uses a separate ACPI HID: "80862289", add this so that the driver will properly bind to the second PWM controller. The second PWM controller is usually not used, the main thing gained by this is properly putting the PWM controller in D3 on suspend. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-09-26pwm: tegra: Remove gratuituous blank lineThierry Reding1-1/+0
It's common to follow a device tree ID table by the MODULE_DEVICE_TABLE immediately, without an extra blank line between. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-08-20pwm: mediatek: Add MT7628 supportJohn Crispin2-2/+19
Add support for MT7628. The SoC is legacy MIPS and hence has no complex clock tree. This patch add an extra flag to the SoC specific data indicating, that no clocks are present. Signed-off-by: John Crispin <john@phrozen.org> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-08-20pwm: meson: Fix mux clock namesJerome Brunet1-2/+1
Current clock name looks like this: /soc/bus@ffd00000/pwm@1b000#mux0 This is bad because CCF uses the clock to create a directory in clk debugfs. With such name, the directory creation (silently) fails and the debugfs entry end up being created at the debugfs root. With this change, the clock name will now be: ffd1b000.pwm#mux0 This matches the clock naming scheme used in the ethernet and mmc driver. It also fixes the problem with debugfs. Fixes: 36af66a79056 ("pwm: Convert to using %pOF instead of full_name") Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Acked-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-08-20pwm: stm32-lp: Remove useless loop in stm32_pwm_lp_remove()Fabrice Gasnier1-3/+1
LPTimer has only one pwm channel (npwm = 1). Remove useless for loop in remove routine. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-08-20pwm: omap-dmtimer: Return -EPROBE_DEFER if no dmtimer platform dataDavid Rivshin1-2/+3
If a pwm-omap-dmtimer is probed before the dmtimer it uses, the platform data won't be set yet. Fixes: ac30751df953 ("ARM: OMAP: pdata-quirks: Remove unused timer pdata") Cc: <stable@vger.kernel.org> # 4.17+ Signed-off-by: David Rivshin <drivshin@allworx.com> Acked-by: Pavel Machek <pavel@ucw.cz> Tested-by: Pavel Machek <pavel@ucw.cz> Acked-by: Ladislav Michl <ladis@linux-mips.org> Tested-by: Andreas Kemnade <andreas@kemnade.info> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-07-12pwm: mxs: Switch to SPDX identifierFabio Estevam1-7/+1
Adopt the SPDX license identifier headers to ease license compliance management. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-07-09pwm: fsl-ftm: Enable support for the new SoC i.MX8QMshenwei.wang@nxp.com1-0/+5
Enabled the support for the new SoC i.MX8QM by adding the compatible string of "fsl,imx8qm-ftm-pwm" and its per-compatible data with setting "has_enable_bits" to "true". Signed-off-by: Shenwei Wang <shenwei.wang@nxp.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-07-09pwm: fsl-ftm: Added the support of per-compatible datashenwei.wang@nxp.com1-2/+30
On the i.MX8x SoC family, an additional PWM enable bit is added for each PWM channel in the register FTM_SC[23:16]. It supports 8 channels. Bit 16 is for channel 0, and bit 23 is for channel 7. As the IP version information can not be obtained via any of the FTM registers, a property of "has_enable_bits" is added via per-compatible data structure. Signed-off-by: Shenwei Wang <shenwei.wang@nxp.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2018-07-09pwm: fsl-ftm: Added a dedicated IP interface clockshenwei.wang@nxp.com1-6/+16
The current driver assumes that the ftm_sys clock works as one of the clock sources for the IP block as well as the IP interface clock. This assumption does not apply any more on the latest i.MX8x SoC family. On i.MX8x SoCs, a dedicated IP interface clock is introduced and it must be enabled before accessing any FTM registers. Moreover, the clock can not be used as the source clock for the FTM IP block. This patch introduces the ipg_clk as the dedicated IP interface clock and by default it is the same as the ftm_sys clock if not specified. Signed-off-by: Shenwei Wang <shenwei.wang@nxp.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 03:28:22 +0000