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linux/drivers/pwm
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Uwe Kleine-König 157cf2b51d pwm: bcm2835: Make sure the channel is enabled after pwm_request() 
[ Upstream commit cda323dbda ]

The .free callback cleared among others the enable bit PWENx in the
control register. When the PWM is requested later again this bit isn't
restored but the core assumes the PWM is enabled and thus skips a
request to configure the same state as before.

To fix that don't touch the hardware configuration in .free(). For
symmetry also drop .request() and configure the mode completely in
.apply().

Fixes: e5a06dc5ac ("pwm: Add BCM2835 PWM driver")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20251118174303.1761577-2-u.kleine-koenig@baylibre.com
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-12-18 13:55:02 +01:00
..
core.c pwm: Fix invalid state detection 2025-07-17 18:37:09 +02:00
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: ab8500: Make use of devm_pwmchip_alloc() function 2024-02-15 12:59:19 +01:00
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: apple: Make use of devm_pwmchip_alloc() function 2024-02-15 12:59:19 +01:00
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: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-atmel.c pwm: atmel: Make use of devm_pwmchip_alloc() function 2024-02-15 12:59:19 +01:00
pwm-axi-pwmgen.c pwm: axi-pwmgen: fix missing separate external clock 2025-06-27 11:11:23 +01:00
pwm-bcm-iproc.c pwm: bcm-iproc: Make use of devm_pwmchip_alloc() function 2024-02-15 12:59:20 +01:00
pwm-bcm-kona.c pwm: bcm-kona: Make use of devm_pwmchip_alloc() function 2024-02-15 12:59:20 +01:00
pwm-bcm2835.c pwm: bcm2835: Make sure the channel is enabled after pwm_request() 2025-12-18 13:55:02 +01:00
pwm-berlin.c pwm: berlin: Fix wrong register in suspend/resume 2025-10-19 16:33:52 +02:00
pwm-brcmstb.c pwm: brcmstb: Make use of devm_pwmchip_alloc() function 2024-02-15 12:59:20 +01:00
pwm-clk.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-clps711x.c pwm: clps711x: Make use of devm_pwmchip_alloc() function 2024-02-15 12:59:21 +01:00
pwm-crc.c pwm: crc: Make use of devm_pwmchip_alloc() function 2024-02-15 12:59:21 +01:00
pwm-cros-ec.c pwm: cros-ec: Simplify device tree xlation 2024-07-10 17:52:47 +02:00
pwm-dwc-core.c module: Convert default symbol namespace to string literal 2025-02-08 09:57:05 +01:00
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: fsl-ftm: Handle clk_get_rate() returning 0 2025-04-20 10:15:28 +02:00
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-imx-tpm.c pwm: imx-tpm: Reset counter if CMOD is 0 2025-08-28 16:30:58 +02:00
pwm-imx1.c pwm: add missing MODULE_DESCRIPTION() macros 2024-07-10 17:52:46 +02:00
pwm-imx27.c pwm: imx27: Workaround of the pwm output bug when decrease the duty cycle 2024-12-05 14:01:30 +01:00
pwm-intel-lgm.c pwm: add missing MODULE_DESCRIPTION() macros 2024-07-10 17:52:46 +02:00
pwm-iqs620a.c pwm: iqs620a: Make use of devm_pwmchip_alloc() function 2024-02-19 11:04:10 +01:00
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: keembay: Make use of devm_pwmchip_alloc() function 2024-02-19 11:04:10 +01:00
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: lpc32xx: Make use of devm_pwmchip_alloc() function 2024-02-19 11:04:11 +01:00
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 module: Convert default symbol namespace to string literal 2025-02-08 09:57:05 +01:00
pwm-lpss.h pwm: lpss-*: Make use of devm_pwmchip_alloc() function 2024-02-19 11:04:11 +01:00
pwm-mediatek.c pwm: mediatek: Fix duty and period setting 2025-08-28 16:30:58 +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: microchip-core: fix incorrect comparison with max period 2025-02-17 10:05:29 +01:00
pwm-mtk-disp.c pwm: mtk-disp: Make use of devm_pwmchip_alloc() function 2024-02-19 11:04:12 +01:00
pwm-mxs.c pwm: mxs: Make use of devm_pwmchip_alloc() function 2024-02-19 11:04:12 +01:00
pwm-ntxec.c pwm: ntxec: Make use of devm_pwmchip_alloc() function 2024-02-19 11:04:12 +01:00
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: Use bulk write to atomicially update registers 2025-11-13 15:34:05 -05:00
pwm-pxa.c pwm: add missing MODULE_DESCRIPTION() macros 2024-07-10 17:52:46 +02:00
pwm-raspberrypi-poe.c pwm: raspberrypi-poe: Make use of devm_pwmchip_alloc() function 2024-02-19 11:04:13 +01:00
pwm-rcar.c pwm: rcar: Improve register calculation 2025-04-20 10:15:27 +02:00
pwm-renesas-tpu.c pwm: renesas-tpu: Make use of devm_pwmchip_alloc() function 2024-02-19 11:04:13 +01:00
pwm-rockchip.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-rz-mtu3.c pwm: rz-mtu3: Make use of devm_pwmchip_alloc() function 2024-02-19 11:04:14 +01:00
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: sl28cpld: Make use of devm_pwmchip_alloc() function 2024-02-19 11:04:15 +01:00
pwm-spear.c pwm: add missing MODULE_DESCRIPTION() macros 2024-07-10 17:52:46 +02:00
pwm-sprd.c pwm: sprd: Make use of devm_pwmchip_alloc() function 2024-02-22 14:39:10 +01:00
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-lp: Add check for clk_enable() 2025-02-08 09:57:06 +01:00
pwm-stm32.c pwm: stm32: Add check for clk_enable() 2025-02-08 09:57:23 +01:00
pwm-stmpe.c pwm: stmpe: Make use of devm_pwmchip_alloc() function 2024-02-22 14:39:25 +01:00
pwm-sun4i.c pwm: Switch back to struct platform_driver::remove() 2024-09-16 15:24:59 +02:00
pwm-sunplus.c pwm: sunplus: Make use of devm_pwmchip_alloc() function 2024-02-22 14:39:25 +01:00
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: tiehrpwm: Fix corner case in clock divisor calculation 2025-10-15 12:00:01 +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