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linux/drivers/pwm
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Uwe Kleine-König b2eaa1170e pwm: Assume a disabled PWM to emit a constant inactive output 
Some PWM hardwares (e.g. MC33XS2410) cannot implement a zero duty cycle
but can instead disable the hardware which also results in a constant
inactive output.

There are some checks (enabled with CONFIG_PWM_DEBUG) to help
implementing a driver without violating the normal rounding rules. Make
them less strict to let above described hardware pass without warning.

Reported-by: Dimitri Fedrau <dima.fedrau@gmail.com>
Link: https://lore.kernel.org/r/20241103205215.GA509903@debian
Fixes: 3ad1f3a332 ("pwm: Implement some checks for lowlevel drivers")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Reviewed-by: Dimitri Fedrau <dima.fedrau@gmail.com>
Tested-by: Dimitri Fedrau <dima.fedrau@gmail.com>
Link: https://lore.kernel.org/r/20241105153521.1001864-2-u.kleine-koenig@baylibre.com
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2024-11-07 12:03:39 +01:00
..
core.c pwm: Assume a disabled PWM to emit a constant inactive output 2024-11-07 12:03:39 +01:00
Kconfig pwm: adp5585: Add Analog Devices ADP5585 support 2024-08-01 14:09:28 +01:00
Makefile pwm: adp5585: Add Analog Devices ADP5585 support 2024-08-01 14:09:28 +01:00
pwm-ab8500.c
pwm-adp5585.c pwm: adp5585: Set OSC_EN bit to 1 when PWM state is enabled 2024-09-16 15:24:58 +02:00
pwm-apple.c
pwm-atmel-hlcdc.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-atmel-tcb.c pwm: atmel-tcb: Use min() macro 2024-10-25 11:33:34 +02:00
pwm-atmel.c
pwm-axi-pwmgen.c pwm: axi-pwmgen: Enable FORCE_ALIGN by default 2024-10-25 11:42:36 +02:00
pwm-bcm2835.c pwm: bcm2835: Drop open coded variant of devm_clk_rate_exclusive_get() 2024-04-30 18:57:08 +02:00
pwm-bcm-iproc.c
pwm-bcm-kona.c
pwm-berlin.c
pwm-brcmstb.c
pwm-clk.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-clps711x.c
pwm-crc.c
pwm-cros-ec.c pwm: cros-ec: Simplify device tree xlation 2024-07-10 17:52:47 +02:00
pwm-dwc-core.c pwm: dwc: allow suspend/resume for 16 channels 2024-04-15 17:28:13 +02:00
pwm-dwc.c pwm: dwc: allow suspend/resume for 16 channels 2024-04-15 17:28:13 +02:00
pwm-dwc.h pwm: dwc: allow suspend/resume for 16 channels 2024-04-15 17:28:13 +02:00
pwm-ep93xx.c pwm: ep93xx: drop legacy pinctrl 2024-09-12 14:33:11 +00:00
pwm-fsl-ftm.c
pwm-gpio.c pwm: Add GPIO PWM driver 2024-07-10 17:52:47 +02:00
pwm-hibvt.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-img.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-imx1.c pwm: add missing MODULE_DESCRIPTION() macros 2024-07-10 17:52:46 +02:00
pwm-imx27.c pwm: imx27: Use clk_bulk_*() API to simplify clock handling 2024-10-25 11:42:36 +02:00
pwm-imx-tpm.c pwm: imx-tpm: Use correct MODULO value for EPWM mode 2024-10-25 11:29:17 +02:00
pwm-intel-lgm.c pwm: add missing MODULE_DESCRIPTION() macros 2024-07-10 17:52:46 +02:00
pwm-iqs620a.c
pwm-jz4740.c pwm: jz4740: Another few conversions to regmap_{set,clear}_bits() 2024-07-10 17:52:46 +02:00
pwm-keembay.c
pwm-lp3943.c pwm: lp3943: Fix an incorrect type in lp3943_pwm_parse_dt() 2024-09-16 15:23:36 +02:00
pwm-lpc18xx-sct.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-lpc32xx.c
pwm-lpss-pci.c pwm: lpss: drop redundant runtime PM handles 2024-07-10 17:53:51 +02:00
pwm-lpss-platform.c pwm: lpss: use devm_pm_runtime_enable() helper 2024-07-10 17:53:51 +02:00
pwm-lpss.c
pwm-lpss.h
pwm-mediatek.c pwm: add missing MODULE_DESCRIPTION() macros 2024-07-10 17:52:46 +02:00
pwm-meson.c pwm: meson: Add support for Amlogic S4 PWM 2024-07-10 17:52:47 +02:00
pwm-microchip-core.c
pwm-mtk-disp.c
pwm-mxs.c
pwm-ntxec.c
pwm-omap-dmtimer.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-pca9685.c pwm: pca9685: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-05-10 07:30:27 +02:00
pwm-pxa.c pwm: add missing MODULE_DESCRIPTION() macros 2024-07-10 17:52:46 +02:00
pwm-raspberrypi-poe.c
pwm-rcar.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-renesas-tpu.c
pwm-rockchip.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-rz-mtu3.c
pwm-samsung.c of: remove internal arguments from of_property_for_each_u32() 2024-07-25 06:53:47 -05:00
pwm-sifive.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-sl28cpld.c
pwm-spear.c pwm: add missing MODULE_DESCRIPTION() macros 2024-07-10 17:52:46 +02:00
pwm-sprd.c
pwm-sti.c pwm: sti: Prefer local variable over pointer dereference 2024-04-26 21:29:17 +02:00
pwm-stm32-lp.c
pwm-stm32.c pwm: stm32: Fix error checking for a regmap_read() call 2024-10-04 19:03:12 +02:00
pwm-stmpe.c
pwm-sun4i.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-sunplus.c
pwm-tegra.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-tiecap.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-tiehrpwm.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-twl-led.c pwm: twl-led: Make use of devm_pwmchip_alloc() function 2024-02-22 14:39:27 +01:00
pwm-twl.c pwm: twl: Make use of devm_pwmchip_alloc() function 2024-02-22 14:39:27 +01:00
pwm-visconti.c pwm: add missing MODULE_DESCRIPTION() macros 2024-07-10 17:52:46 +02:00
pwm-vt8500.c pwm: vt8500: Make use of devm_pwmchip_alloc() function 2024-02-22 14:39:27 +01:00
pwm-xilinx.c pwm: xilinx: Simplify using devm_ functions 2024-07-10 17:53:52 +02:00