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1# SPDX-License-Identifier: GPL-2.0-only
2menuconfig PWM
3 bool "Pulse-Width Modulation (PWM) Support"
4 help
5 Generic Pulse-Width Modulation (PWM) support.
6
7 In Pulse-Width Modulation, a variation of the width of pulses
8 in a rectangular pulse signal is used as a means to alter the
9 average power of the signal. Applications include efficient
10 power delivery and voltage regulation. In computer systems,
11 PWMs are commonly used to control fans or the brightness of
12 display backlights.
13
14 This framework provides a generic interface to PWM devices
15 within the Linux kernel. On the driver side it provides an API
16 to register and unregister a PWM chip, an abstraction of a PWM
17 controller, that supports one or more PWM devices. Client
18 drivers can request PWM devices and use the generic framework
19 to configure as well as enable and disable them.
20
21 This generic framework replaces the legacy PWM framework which
22 allows only a single driver implementing the required API. Not
23 all legacy implementations have been ported to the framework
24 yet. The framework provides an API that is backward compatible
25 with the legacy framework so that existing client drivers
26 continue to work as expected.
27
28 If unsure, say no.
29
30if PWM
31
32config PWM_SYSFS
33 bool
34 default y if SYSFS
35
36config PWM_DEBUG
37 bool "PWM lowlevel drivers additional checks and debug messages"
38 depends on DEBUG_KERNEL
39 help
40 This option enables some additional checks to help lowlevel driver
41 authors to get their callbacks implemented correctly.
42 It is expected to introduce some runtime overhead and diagnostic
43 output to the kernel log, so only enable while working on a driver.
44
45config PWM_AB8500
46 tristate "AB8500 PWM support"
47 depends on AB8500_CORE && ARCH_U8500
48 help
49 Generic PWM framework driver for Analog Baseband AB8500.
50
51 To compile this driver as a module, choose M here: the module
52 will be called pwm-ab8500.
53
54config PWM_APPLE
55 tristate "Apple SoC PWM support"
56 depends on ARCH_APPLE || COMPILE_TEST
57 help
58 Generic PWM framework driver for PWM controller present on
59 Apple SoCs
60
61 Say Y here if you have an ARM Apple laptop, otherwise say N
62
63 To compile this driver as a module, choose M here: the module
64 will be called pwm-apple.
65
66config PWM_ATMEL
67 tristate "Atmel PWM support"
68 depends on ARCH_AT91 || COMPILE_TEST
69 depends on HAS_IOMEM && OF
70 help
71 Generic PWM framework driver for Atmel SoC.
72
73 To compile this driver as a module, choose M here: the module
74 will be called pwm-atmel.
75
76config PWM_ATMEL_HLCDC_PWM
77 tristate "Atmel HLCDC PWM support"
78 depends on MFD_ATMEL_HLCDC
79 depends on HAVE_CLK
80 help
81 Generic PWM framework driver for the PWM output of the HLCDC
82 (Atmel High-end LCD Controller). This PWM output is mainly used
83 to control the LCD backlight.
84
85 To compile this driver as a module, choose M here: the module
86 will be called pwm-atmel-hlcdc.
87
88config PWM_ATMEL_TCB
89 tristate "Atmel TC Block PWM support"
90 depends on OF
91 select REGMAP_MMIO
92 help
93 Generic PWM framework driver for Atmel Timer Counter Block.
94
95 A Timer Counter Block provides 6 PWM devices grouped by 2.
96 Devices in a given group must have the same period.
97
98 To compile this driver as a module, choose M here: the module
99 will be called pwm-atmel-tcb.
100
101config PWM_BCM_IPROC
102 tristate "iProc PWM support"
103 depends on ARCH_BCM_IPROC || COMPILE_TEST
104 depends on COMMON_CLK && HAS_IOMEM
105 default ARCH_BCM_IPROC
106 help
107 Generic PWM framework driver for Broadcom iProc PWM block. This
108 block is used in Broadcom iProc SoC's.
109
110 To compile this driver as a module, choose M here: the module
111 will be called pwm-bcm-iproc.
112
113config PWM_BCM_KONA
114 tristate "Kona PWM support"
115 depends on ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS || COMPILE_TEST
116 depends on HAVE_CLK && HAS_IOMEM
117 default ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS
118 help
119 Generic PWM framework driver for Broadcom Kona PWM block.
120
121 To compile this driver as a module, choose M here: the module
122 will be called pwm-bcm-kona.
123
124config PWM_BCM2835
125 tristate "BCM2835 PWM support"
126 depends on ARCH_BCM2835 || ARCH_BRCMSTB || COMPILE_TEST
127 depends on HAS_IOMEM
128 help
129 PWM framework driver for BCM2835 controller (Raspberry Pi)
130
131 To compile this driver as a module, choose M here: the module
132 will be called pwm-bcm2835.
133
134config PWM_BERLIN
135 tristate "Marvell Berlin PWM support"
136 depends on ARCH_BERLIN || COMPILE_TEST
137 depends on HAS_IOMEM
138 help
139 PWM framework driver for Marvell Berlin SoCs.
140
141 To compile this driver as a module, choose M here: the module
142 will be called pwm-berlin.
143
144config PWM_BRCMSTB
145 tristate "Broadcom STB PWM support"
146 depends on ARCH_BRCMSTB || BMIPS_GENERIC || COMPILE_TEST
147 depends on HAS_IOMEM
148 help
149 Generic PWM framework driver for the Broadcom Set-top-Box
150 SoCs (BCM7xxx).
151
152 To compile this driver as a module, choose M Here: the module
153 will be called pwm-brcmstb.c.
154
155config PWM_CLK
156 tristate "Clock based PWM support"
157 depends on HAVE_CLK || COMPILE_TEST
158 help
159 Generic PWM framework driver for outputs that can be
160 muxed to clocks.
161
162 To compile this driver as a module, choose M here: the module
163 will be called pwm-clk.
164
165config PWM_CLPS711X
166 tristate "CLPS711X PWM support"
167 depends on ARCH_CLPS711X || COMPILE_TEST
168 depends on HAS_IOMEM
169 help
170 Generic PWM framework driver for Cirrus Logic CLPS711X.
171
172 To compile this driver as a module, choose M here: the module
173 will be called pwm-clps711x.
174
175config PWM_CRC
176 tristate "Intel Crystalcove (CRC) PWM support"
177 depends on INTEL_SOC_PMIC
178 help
179 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM
180 control.
181
182config PWM_CROS_EC
183 tristate "ChromeOS EC PWM driver"
184 depends on CROS_EC
185 help
186 PWM driver for exposing a PWM attached to the ChromeOS Embedded
187 Controller.
188
189config PWM_DWC_CORE
190 tristate
191 depends on HAS_IOMEM
192 help
193 PWM driver for Synopsys DWC PWM Controller.
194
195 To compile this driver as a module, build the dependecies as
196 modules, this will be called pwm-dwc-core.
197
198config PWM_DWC
199 tristate "DesignWare PWM Controller (PCI bus)"
200 depends on HAS_IOMEM && PCI
201 select PWM_DWC_CORE
202 help
203 PWM driver for Synopsys DWC PWM Controller attached to a PCI bus.
204
205 To compile this driver as a module, choose M here: the module
206 will be called pwm-dwc.
207
208config PWM_EP93XX
209 tristate "Cirrus Logic EP93xx PWM support"
210 depends on ARCH_EP93XX || COMPILE_TEST
211 depends on HAS_IOMEM
212 help
213 Generic PWM framework driver for Cirrus Logic EP93xx.
214
215 To compile this driver as a module, choose M here: the module
216 will be called pwm-ep93xx.
217
218config PWM_FSL_FTM
219 tristate "Freescale FlexTimer Module (FTM) PWM support"
220 depends on HAS_IOMEM
221 depends on OF
222 select REGMAP_MMIO
223 help
224 Generic FTM PWM framework driver for Freescale VF610 and
225 Layerscape LS-1 SoCs.
226
227 To compile this driver as a module, choose M here: the module
228 will be called pwm-fsl-ftm.
229
230config PWM_HIBVT
231 tristate "HiSilicon BVT PWM support"
232 depends on ARCH_HISI || COMPILE_TEST
233 depends on HAS_IOMEM
234 help
235 Generic PWM framework driver for HiSilicon BVT SoCs.
236
237 To compile this driver as a module, choose M here: the module
238 will be called pwm-hibvt.
239
240config PWM_IMG
241 tristate "Imagination Technologies PWM driver"
242 depends on HAS_IOMEM
243 depends on MFD_SYSCON
244 depends on COMMON_CLK
245 depends on MIPS || COMPILE_TEST
246 help
247 Generic PWM framework driver for Imagination Technologies
248 PWM block which supports 4 channels.
249
250 To compile this driver as a module, choose M here: the module
251 will be called pwm-img
252
253config PWM_IMX1
254 tristate "i.MX1 PWM support"
255 depends on ARCH_MXC || COMPILE_TEST
256 depends on HAS_IOMEM
257 help
258 Generic PWM framework driver for i.MX1 and i.MX21
259
260 To compile this driver as a module, choose M here: the module
261 will be called pwm-imx1.
262
263config PWM_IMX27
264 tristate "i.MX27 PWM support"
265 depends on ARCH_MXC || COMPILE_TEST
266 depends on HAS_IOMEM
267 help
268 Generic PWM framework driver for i.MX27 and later i.MX SoCs.
269
270 To compile this driver as a module, choose M here: the module
271 will be called pwm-imx27.
272
273config PWM_IMX_TPM
274 tristate "i.MX TPM PWM support"
275 depends on ARCH_MXC || COMPILE_TEST
276 depends on HAVE_CLK && HAS_IOMEM
277 help
278 Generic PWM framework driver for i.MX7ULP TPM module, TPM's full
279 name is Low Power Timer/Pulse Width Modulation Module.
280
281 To compile this driver as a module, choose M here: the module
282 will be called pwm-imx-tpm.
283
284config PWM_INTEL_LGM
285 tristate "Intel LGM PWM support"
286 depends on HAS_IOMEM
287 depends on (OF && X86) || COMPILE_TEST
288 select REGMAP_MMIO
289 help
290 Generic PWM fan controller driver for LGM SoC.
291
292 To compile this driver as a module, choose M here: the module
293 will be called pwm-intel-lgm.
294
295config PWM_IQS620A
296 tristate "Azoteq IQS620A PWM support"
297 depends on MFD_IQS62X || COMPILE_TEST
298 help
299 Generic PWM framework driver for the Azoteq IQS620A multi-function
300 sensor.
301
302 To compile this driver as a module, choose M here: the module will
303 be called pwm-iqs620a.
304
305config PWM_JZ4740
306 tristate "Ingenic JZ47xx PWM support"
307 depends on MACH_INGENIC || COMPILE_TEST
308 depends on COMMON_CLK && OF
309 select MFD_SYSCON
310 help
311 Generic PWM framework driver for Ingenic JZ47xx based
312 machines.
313
314 To compile this driver as a module, choose M here: the module
315 will be called pwm-jz4740.
316
317config PWM_KEEMBAY
318 tristate "Intel Keem Bay PWM driver"
319 depends on ARCH_KEEMBAY || COMPILE_TEST
320 depends on COMMON_CLK && HAS_IOMEM
321 help
322 The platform driver for Intel Keem Bay PWM controller.
323
324 To compile this driver as a module, choose M here: the module
325 will be called pwm-keembay.
326
327config PWM_LP3943
328 tristate "TI/National Semiconductor LP3943 PWM support"
329 depends on MFD_LP3943
330 help
331 Generic PWM framework driver for LP3943 which supports two PWM
332 channels.
333
334 To compile this driver as a module, choose M here: the module
335 will be called pwm-lp3943.
336
337config PWM_LPC18XX_SCT
338 tristate "LPC18xx/43xx PWM/SCT support"
339 depends on ARCH_LPC18XX || COMPILE_TEST
340 depends on HAS_IOMEM
341 help
342 Generic PWM framework driver for NXP LPC18xx PWM/SCT which
343 supports 16 channels.
344 A maximum of 15 channels can be requested simultaneously and
345 must have the same period.
346
347 To compile this driver as a module, choose M here: the module
348 will be called pwm-lpc18xx-sct.
349
350config PWM_LPC32XX
351 tristate "LPC32XX PWM support"
352 depends on ARCH_LPC32XX || COMPILE_TEST
353 depends on HAS_IOMEM
354 help
355 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two
356 PWM controllers.
357
358 To compile this driver as a module, choose M here: the module
359 will be called pwm-lpc32xx.
360
361config PWM_LPSS
362 depends on HAS_IOMEM
363 tristate
364
365config PWM_LPSS_PCI
366 tristate "Intel LPSS PWM PCI driver"
367 depends on X86 || COMPILE_TEST
368 depends on HAS_IOMEM && PCI
369 select PWM_LPSS
370 help
371 The PCI driver for Intel Low Power Subsystem PWM controller.
372
373 To compile this driver as a module, choose M here: the module
374 will be called pwm-lpss-pci.
375
376config PWM_LPSS_PLATFORM
377 tristate "Intel LPSS PWM platform driver"
378 depends on (X86 && ACPI) || COMPILE_TEST
379 depends on HAS_IOMEM
380 select PWM_LPSS
381 help
382 The platform driver for Intel Low Power Subsystem PWM controller.
383
384 To compile this driver as a module, choose M here: the module
385 will be called pwm-lpss-platform.
386
387config PWM_MESON
388 tristate "Amlogic Meson PWM driver"
389 depends on ARCH_MESON || COMPILE_TEST
390 depends on COMMON_CLK && HAS_IOMEM
391 help
392 The platform driver for Amlogic Meson PWM controller.
393
394 To compile this driver as a module, choose M here: the module
395 will be called pwm-meson.
396
397config PWM_MTK_DISP
398 tristate "MediaTek display PWM driver"
399 depends on ARCH_MEDIATEK || COMPILE_TEST
400 depends on HAS_IOMEM
401 help
402 Generic PWM framework driver for MediaTek disp-pwm device.
403 The PWM is used to control the backlight brightness for display.
404
405 To compile this driver as a module, choose M here: the module
406 will be called pwm-mtk-disp.
407
408config PWM_MEDIATEK
409 tristate "MediaTek PWM support"
410 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST
411 depends on HAS_IOMEM
412 help
413 Generic PWM framework driver for Mediatek ARM SoC.
414
415 To compile this driver as a module, choose M here: the module
416 will be called pwm-mediatek.
417
418config PWM_MICROCHIP_CORE
419 tristate "Microchip corePWM PWM support"
420 depends on ARCH_MICROCHIP_POLARFIRE || COMPILE_TEST
421 depends on HAS_IOMEM && OF
422 help
423 PWM driver for Microchip FPGA soft IP core.
424
425 To compile this driver as a module, choose M here: the module
426 will be called pwm-microchip-core.
427
428config PWM_MXS
429 tristate "Freescale MXS PWM support"
430 depends on ARCH_MXS || COMPILE_TEST
431 depends on HAS_IOMEM && OF
432 select STMP_DEVICE
433 help
434 Generic PWM framework driver for Freescale MXS.
435
436 To compile this driver as a module, choose M here: the module
437 will be called pwm-mxs.
438
439config PWM_NTXEC
440 tristate "Netronix embedded controller PWM support"
441 depends on MFD_NTXEC
442 help
443 Say yes here if you want to support the PWM output of the embedded
444 controller found in certain e-book readers designed by the original
445 design manufacturer Netronix.
446
447config PWM_OMAP_DMTIMER
448 tristate "OMAP Dual-Mode Timer PWM support"
449 depends on OF
450 depends on OMAP_DM_TIMER || COMPILE_TEST
451 help
452 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output
453
454 To compile this driver as a module, choose M here: the module
455 will be called pwm-omap-dmtimer
456
457config PWM_PCA9685
458 tristate "NXP PCA9685 PWM driver"
459 depends on I2C
460 select REGMAP_I2C
461 help
462 Generic PWM framework driver for NXP PCA9685 LED controller.
463
464 To compile this driver as a module, choose M here: the module
465 will be called pwm-pca9685.
466
467config PWM_PXA
468 tristate "PXA PWM support"
469 depends on ARCH_PXA || ARCH_MMP || COMPILE_TEST
470 depends on HAS_IOMEM
471 help
472 Generic PWM framework driver for PXA.
473
474 To compile this driver as a module, choose M here: the module
475 will be called pwm-pxa.
476
477config PWM_RASPBERRYPI_POE
478 tristate "Raspberry Pi Firwmware PoE Hat PWM support"
479 # Make sure not 'y' when RASPBERRYPI_FIRMWARE is 'm'. This can only
480 # happen when COMPILE_TEST=y, hence the added !RASPBERRYPI_FIRMWARE.
481 depends on RASPBERRYPI_FIRMWARE || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE)
482 help
483 Enable Raspberry Pi firmware controller PWM bus used to control the
484 official RPI PoE hat
485
486config PWM_RCAR
487 tristate "Renesas R-Car PWM support"
488 depends on ARCH_RENESAS || COMPILE_TEST
489 depends on HAS_IOMEM
490 help
491 This driver exposes the PWM Timer controller found in Renesas
492 R-Car chips through the PWM API.
493
494 To compile this driver as a module, choose M here: the module
495 will be called pwm-rcar.
496
497config PWM_RENESAS_TPU
498 tristate "Renesas TPU PWM support"
499 depends on ARCH_RENESAS || COMPILE_TEST
500 depends on HAS_IOMEM
501 help
502 This driver exposes the Timer Pulse Unit (TPU) PWM controller found
503 in Renesas chips through the PWM API.
504
505 To compile this driver as a module, choose M here: the module
506 will be called pwm-renesas-tpu.
507
508config PWM_ROCKCHIP
509 tristate "Rockchip PWM support"
510 depends on ARCH_ROCKCHIP || COMPILE_TEST
511 depends on HAS_IOMEM
512 help
513 Generic PWM framework driver for the PWM controller found on
514 Rockchip SoCs.
515
516config PWM_RZ_MTU3
517 tristate "Renesas RZ/G2L MTU3a PWM Timer support"
518 depends on RZ_MTU3
519 depends on HAS_IOMEM
520 help
521 This driver exposes the MTU3a PWM Timer controller found in Renesas
522 RZ/G2L like chips through the PWM API.
523
524 To compile this driver as a module, choose M here: the module
525 will be called pwm-rz-mtu3.
526
527config PWM_SAMSUNG
528 tristate "Samsung PWM support"
529 depends on PLAT_SAMSUNG || ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST
530 depends on HAS_IOMEM
531 help
532 Generic PWM framework driver for Samsung S3C24xx, S3C64xx, S5Pv210
533 and Exynos SoCs.
534 Choose Y here only if you build for such Samsung SoC.
535
536 To compile this driver as a module, choose M here: the module
537 will be called pwm-samsung.
538
539config PWM_SIFIVE
540 tristate "SiFive PWM support"
541 depends on OF
542 depends on COMMON_CLK && HAS_IOMEM
543 depends on RISCV || COMPILE_TEST
544 help
545 Generic PWM framework driver for SiFive SoCs.
546
547 To compile this driver as a module, choose M here: the module
548 will be called pwm-sifive.
549
550config PWM_SL28CPLD
551 tristate "Kontron sl28cpld PWM support"
552 depends on MFD_SL28CPLD || COMPILE_TEST
553 help
554 Generic PWM framework driver for board management controller
555 found on the Kontron sl28 CPLD.
556
557 To compile this driver as a module, choose M here: the module
558 will be called pwm-sl28cpld.
559
560config PWM_SPEAR
561 tristate "STMicroelectronics SPEAr PWM support"
562 depends on PLAT_SPEAR || COMPILE_TEST
563 depends on HAS_IOMEM && OF
564 help
565 Generic PWM framework driver for the PWM controller on ST
566 SPEAr SoCs.
567
568 To compile this driver as a module, choose M here: the module
569 will be called pwm-spear.
570
571config PWM_SPRD
572 tristate "Spreadtrum PWM support"
573 depends on ARCH_SPRD || COMPILE_TEST
574 depends on HAS_IOMEM
575 help
576 Generic PWM framework driver for the PWM controller on
577 Spreadtrum SoCs.
578
579 To compile this driver as a module, choose M here: the module
580 will be called pwm-sprd.
581
582config PWM_STI
583 tristate "STiH4xx PWM support"
584 depends on ARCH_STI || COMPILE_TEST
585 depends on HAS_IOMEM && OF
586 help
587 Generic PWM framework driver for STiH4xx SoCs.
588
589 To compile this driver as a module, choose M here: the module
590 will be called pwm-sti.
591
592config PWM_STM32
593 tristate "STMicroelectronics STM32 PWM"
594 depends on MFD_STM32_TIMERS || COMPILE_TEST
595 help
596 Generic PWM framework driver for STM32 SoCs.
597
598 To compile this driver as a module, choose M here: the module
599 will be called pwm-stm32.
600
601config PWM_STM32_LP
602 tristate "STMicroelectronics STM32 PWM LP"
603 depends on MFD_STM32_LPTIMER || COMPILE_TEST
604 help
605 Generic PWM framework driver for STMicroelectronics STM32 SoCs
606 with Low-Power Timer (LPTIM).
607
608 To compile this driver as a module, choose M here: the module
609 will be called pwm-stm32-lp.
610
611config PWM_STMPE
612 bool "STMPE expander PWM export"
613 depends on MFD_STMPE
614 help
615 This enables support for the PWMs found in the STMPE I/O
616 expanders.
617
618config PWM_SUN4I
619 tristate "Allwinner PWM support"
620 depends on ARCH_SUNXI || COMPILE_TEST
621 depends on HAS_IOMEM && COMMON_CLK
622 help
623 Generic PWM framework driver for Allwinner SoCs.
624
625 To compile this driver as a module, choose M here: the module
626 will be called pwm-sun4i.
627
628config PWM_SUNPLUS
629 tristate "Sunplus PWM support"
630 depends on ARCH_SUNPLUS || COMPILE_TEST
631 depends on HAS_IOMEM && OF
632 help
633 Generic PWM framework driver for the PWM controller on
634 Sunplus SoCs.
635
636 To compile this driver as a module, choose M here: the module
637 will be called pwm-sunplus.
638
639config PWM_TEGRA
640 tristate "NVIDIA Tegra PWM support"
641 depends on ARCH_TEGRA || COMPILE_TEST
642 depends on HAS_IOMEM
643 help
644 Generic PWM framework driver for the PWFM controller found on NVIDIA
645 Tegra SoCs.
646
647 To compile this driver as a module, choose M here: the module
648 will be called pwm-tegra.
649
650config PWM_TIECAP
651 tristate "ECAP PWM support"
652 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
653 depends on HAS_IOMEM
654 help
655 PWM driver support for the ECAP APWM controller found on TI SOCs
656
657 To compile this driver as a module, choose M here: the module
658 will be called pwm-tiecap.
659
660config PWM_TIEHRPWM
661 tristate "EHRPWM PWM support"
662 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3 || COMPILE_TEST
663 depends on HAS_IOMEM
664 help
665 PWM driver support for the EHRPWM controller found on TI SOCs
666
667 To compile this driver as a module, choose M here: the module
668 will be called pwm-tiehrpwm.
669
670config PWM_TWL
671 tristate "TWL4030/6030 PWM support"
672 depends on TWL4030_CORE
673 help
674 Generic PWM framework driver for TWL4030/6030.
675
676 To compile this driver as a module, choose M here: the module
677 will be called pwm-twl.
678
679config PWM_TWL_LED
680 tristate "TWL4030/6030 PWM support for LED drivers"
681 depends on TWL4030_CORE
682 help
683 Generic PWM framework driver for TWL4030/6030 LED terminals.
684
685 To compile this driver as a module, choose M here: the module
686 will be called pwm-twl-led.
687
688config PWM_VISCONTI
689 tristate "Toshiba Visconti PWM support"
690 depends on ARCH_VISCONTI || COMPILE_TEST
691 help
692 PWM Subsystem driver support for Toshiba Visconti SoCs.
693
694 To compile this driver as a module, choose M here: the module
695 will be called pwm-visconti.
696
697config PWM_VT8500
698 tristate "vt8500 PWM support"
699 depends on ARCH_VT8500 || COMPILE_TEST
700 depends on HAS_IOMEM
701 help
702 Generic PWM framework driver for vt8500.
703
704 To compile this driver as a module, choose M here: the module
705 will be called pwm-vt8500.
706
707config PWM_XILINX
708 tristate "Xilinx AXI Timer PWM support"
709 depends on OF_ADDRESS
710 depends on COMMON_CLK
711 select REGMAP_MMIO
712 help
713 PWM driver for Xilinx LogiCORE IP AXI timers. This timer is
714 typically a soft core which may be present in Xilinx FPGAs.
715 This device may also be present in Microblaze soft processors.
716 If you don't have this IP in your design, choose N.
717
718 To compile this driver as a module, choose M here: the module
719 will be called pwm-xilinx.
720
721endif
1# SPDX-License-Identifier: GPL-2.0-only
2menuconfig PWM
3 bool "Pulse-Width Modulation (PWM) Support"
4 help
5 Generic Pulse-Width Modulation (PWM) support.
6
7 In Pulse-Width Modulation, a variation of the width of pulses
8 in a rectangular pulse signal is used as a means to alter the
9 average power of the signal. Applications include efficient
10 power delivery and voltage regulation. In computer systems,
11 PWMs are commonly used to control fans or the brightness of
12 display backlights.
13
14 This framework provides a generic interface to PWM devices
15 within the Linux kernel. On the driver side it provides an API
16 to register and unregister a PWM chip, an abstraction of a PWM
17 controller, that supports one or more PWM devices. Client
18 drivers can request PWM devices and use the generic framework
19 to configure as well as enable and disable them.
20
21 This generic framework replaces the legacy PWM framework which
22 allows only a single driver implementing the required API. Not
23 all legacy implementations have been ported to the framework
24 yet. The framework provides an API that is backward compatible
25 with the legacy framework so that existing client drivers
26 continue to work as expected.
27
28 If unsure, say no.
29
30if PWM
31
32config PWM_SYSFS
33 bool
34 default y if SYSFS
35
36config PWM_DEBUG
37 bool "PWM lowlevel drivers additional checks and debug messages"
38 depends on DEBUG_KERNEL
39 help
40 This option enables some additional checks to help lowlevel driver
41 authors to get their callbacks implemented correctly.
42 It is expected to introduce some runtime overhead and diagnostic
43 output to the kernel log, so only enable while working on a driver.
44
45config PWM_AB8500
46 tristate "AB8500 PWM support"
47 depends on AB8500_CORE && ARCH_U8500
48 help
49 Generic PWM framework driver for Analog Baseband AB8500.
50
51 To compile this driver as a module, choose M here: the module
52 will be called pwm-ab8500.
53
54config PWM_ATMEL
55 tristate "Atmel PWM support"
56 depends on ARCH_AT91 || COMPILE_TEST
57 depends on HAS_IOMEM && OF
58 help
59 Generic PWM framework driver for Atmel SoC.
60
61 To compile this driver as a module, choose M here: the module
62 will be called pwm-atmel.
63
64config PWM_ATMEL_HLCDC_PWM
65 tristate "Atmel HLCDC PWM support"
66 depends on MFD_ATMEL_HLCDC
67 depends on HAVE_CLK
68 help
69 Generic PWM framework driver for the PWM output of the HLCDC
70 (Atmel High-end LCD Controller). This PWM output is mainly used
71 to control the LCD backlight.
72
73 To compile this driver as a module, choose M here: the module
74 will be called pwm-atmel-hlcdc.
75
76config PWM_ATMEL_TCB
77 tristate "Atmel TC Block PWM support"
78 depends on OF
79 select REGMAP_MMIO
80 help
81 Generic PWM framework driver for Atmel Timer Counter Block.
82
83 A Timer Counter Block provides 6 PWM devices grouped by 2.
84 Devices in a given group must have the same period.
85
86 To compile this driver as a module, choose M here: the module
87 will be called pwm-atmel-tcb.
88
89config PWM_BCM_IPROC
90 tristate "iProc PWM support"
91 depends on ARCH_BCM_IPROC || COMPILE_TEST
92 depends on COMMON_CLK && HAS_IOMEM
93 default ARCH_BCM_IPROC
94 help
95 Generic PWM framework driver for Broadcom iProc PWM block. This
96 block is used in Broadcom iProc SoC's.
97
98 To compile this driver as a module, choose M here: the module
99 will be called pwm-bcm-iproc.
100
101config PWM_BCM_KONA
102 tristate "Kona PWM support"
103 depends on ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS || COMPILE_TEST
104 depends on HAVE_CLK && HAS_IOMEM
105 default ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS
106 help
107 Generic PWM framework driver for Broadcom Kona PWM block.
108
109 To compile this driver as a module, choose M here: the module
110 will be called pwm-bcm-kona.
111
112config PWM_BCM2835
113 tristate "BCM2835 PWM support"
114 depends on ARCH_BCM2835 || ARCH_BRCMSTB || COMPILE_TEST
115 depends on HAS_IOMEM
116 help
117 PWM framework driver for BCM2835 controller (Raspberry Pi)
118
119 To compile this driver as a module, choose M here: the module
120 will be called pwm-bcm2835.
121
122config PWM_BERLIN
123 tristate "Marvell Berlin PWM support"
124 depends on ARCH_BERLIN || COMPILE_TEST
125 depends on HAS_IOMEM
126 help
127 PWM framework driver for Marvell Berlin SoCs.
128
129 To compile this driver as a module, choose M here: the module
130 will be called pwm-berlin.
131
132config PWM_BRCMSTB
133 tristate "Broadcom STB PWM support"
134 depends on ARCH_BRCMSTB || BMIPS_GENERIC || COMPILE_TEST
135 depends on HAS_IOMEM
136 help
137 Generic PWM framework driver for the Broadcom Set-top-Box
138 SoCs (BCM7xxx).
139
140 To compile this driver as a module, choose M Here: the module
141 will be called pwm-brcmstb.c.
142
143config PWM_CLPS711X
144 tristate "CLPS711X PWM support"
145 depends on ARCH_CLPS711X || COMPILE_TEST
146 depends on HAS_IOMEM
147 help
148 Generic PWM framework driver for Cirrus Logic CLPS711X.
149
150 To compile this driver as a module, choose M here: the module
151 will be called pwm-clps711x.
152
153config PWM_CRC
154 bool "Intel Crystalcove (CRC) PWM support"
155 depends on X86 && INTEL_SOC_PMIC
156 help
157 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM
158 control.
159
160config PWM_CROS_EC
161 tristate "ChromeOS EC PWM driver"
162 depends on CROS_EC
163 help
164 PWM driver for exposing a PWM attached to the ChromeOS Embedded
165 Controller.
166
167config PWM_DWC
168 tristate "DesignWare PWM Controller"
169 depends on PCI
170 help
171 PWM driver for Synopsys DWC PWM Controller attached to a PCI bus.
172
173 To compile this driver as a module, choose M here: the module
174 will be called pwm-dwc.
175
176config PWM_EP93XX
177 tristate "Cirrus Logic EP93xx PWM support"
178 depends on ARCH_EP93XX || COMPILE_TEST
179 depends on HAS_IOMEM
180 help
181 Generic PWM framework driver for Cirrus Logic EP93xx.
182
183 To compile this driver as a module, choose M here: the module
184 will be called pwm-ep93xx.
185
186config PWM_FSL_FTM
187 tristate "Freescale FlexTimer Module (FTM) PWM support"
188 depends on HAS_IOMEM
189 depends on OF
190 select REGMAP_MMIO
191 help
192 Generic FTM PWM framework driver for Freescale VF610 and
193 Layerscape LS-1 SoCs.
194
195 To compile this driver as a module, choose M here: the module
196 will be called pwm-fsl-ftm.
197
198config PWM_HIBVT
199 tristate "HiSilicon BVT PWM support"
200 depends on ARCH_HISI || COMPILE_TEST
201 depends on HAS_IOMEM
202 help
203 Generic PWM framework driver for HiSilicon BVT SoCs.
204
205 To compile this driver as a module, choose M here: the module
206 will be called pwm-hibvt.
207
208config PWM_IMG
209 tristate "Imagination Technologies PWM driver"
210 depends on HAS_IOMEM
211 depends on MFD_SYSCON
212 depends on COMMON_CLK
213 depends on MIPS || COMPILE_TEST
214 help
215 Generic PWM framework driver for Imagination Technologies
216 PWM block which supports 4 channels.
217
218 To compile this driver as a module, choose M here: the module
219 will be called pwm-img
220
221config PWM_IMX1
222 tristate "i.MX1 PWM support"
223 depends on ARCH_MXC || COMPILE_TEST
224 depends on HAS_IOMEM
225 help
226 Generic PWM framework driver for i.MX1 and i.MX21
227
228 To compile this driver as a module, choose M here: the module
229 will be called pwm-imx1.
230
231config PWM_IMX27
232 tristate "i.MX27 PWM support"
233 depends on ARCH_MXC || COMPILE_TEST
234 depends on HAS_IOMEM
235 help
236 Generic PWM framework driver for i.MX27 and later i.MX SoCs.
237
238 To compile this driver as a module, choose M here: the module
239 will be called pwm-imx27.
240
241config PWM_IMX_TPM
242 tristate "i.MX TPM PWM support"
243 depends on ARCH_MXC || COMPILE_TEST
244 depends on HAVE_CLK && HAS_IOMEM
245 help
246 Generic PWM framework driver for i.MX7ULP TPM module, TPM's full
247 name is Low Power Timer/Pulse Width Modulation Module.
248
249 To compile this driver as a module, choose M here: the module
250 will be called pwm-imx-tpm.
251
252config PWM_INTEL_LGM
253 tristate "Intel LGM PWM support"
254 depends on HAS_IOMEM
255 depends on (OF && X86) || COMPILE_TEST
256 select REGMAP_MMIO
257 help
258 Generic PWM fan controller driver for LGM SoC.
259
260 To compile this driver as a module, choose M here: the module
261 will be called pwm-intel-lgm.
262
263config PWM_IQS620A
264 tristate "Azoteq IQS620A PWM support"
265 depends on MFD_IQS62X || COMPILE_TEST
266 help
267 Generic PWM framework driver for the Azoteq IQS620A multi-function
268 sensor.
269
270 To compile this driver as a module, choose M here: the module will
271 be called pwm-iqs620a.
272
273config PWM_JZ4740
274 tristate "Ingenic JZ47xx PWM support"
275 depends on MIPS
276 depends on COMMON_CLK
277 select MFD_SYSCON
278 help
279 Generic PWM framework driver for Ingenic JZ47xx based
280 machines.
281
282 To compile this driver as a module, choose M here: the module
283 will be called pwm-jz4740.
284
285config PWM_KEEMBAY
286 tristate "Intel Keem Bay PWM driver"
287 depends on ARCH_KEEMBAY || (ARM64 && COMPILE_TEST)
288 help
289 The platform driver for Intel Keem Bay PWM controller.
290
291 To compile this driver as a module, choose M here: the module
292 will be called pwm-keembay.
293
294config PWM_LP3943
295 tristate "TI/National Semiconductor LP3943 PWM support"
296 depends on MFD_LP3943
297 help
298 Generic PWM framework driver for LP3943 which supports two PWM
299 channels.
300
301 To compile this driver as a module, choose M here: the module
302 will be called pwm-lp3943.
303
304config PWM_LPC18XX_SCT
305 tristate "LPC18xx/43xx PWM/SCT support"
306 depends on ARCH_LPC18XX || COMPILE_TEST
307 depends on HAS_IOMEM
308 help
309 Generic PWM framework driver for NXP LPC18xx PWM/SCT which
310 supports 16 channels.
311 A maximum of 15 channels can be requested simultaneously and
312 must have the same period.
313
314 To compile this driver as a module, choose M here: the module
315 will be called pwm-lpc18xx-sct.
316
317config PWM_LPC32XX
318 tristate "LPC32XX PWM support"
319 depends on ARCH_LPC32XX || COMPILE_TEST
320 depends on HAS_IOMEM
321 help
322 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two
323 PWM controllers.
324
325 To compile this driver as a module, choose M here: the module
326 will be called pwm-lpc32xx.
327
328config PWM_LPSS
329 depends on HAS_IOMEM
330 tristate
331
332config PWM_LPSS_PCI
333 tristate "Intel LPSS PWM PCI driver"
334 depends on X86 || COMPILE_TEST
335 depends on HAS_IOMEM && PCI
336 select PWM_LPSS
337 help
338 The PCI driver for Intel Low Power Subsystem PWM controller.
339
340 To compile this driver as a module, choose M here: the module
341 will be called pwm-lpss-pci.
342
343config PWM_LPSS_PLATFORM
344 tristate "Intel LPSS PWM platform driver"
345 depends on (X86 && ACPI) || COMPILE_TEST
346 depends on HAS_IOMEM
347 select PWM_LPSS
348 help
349 The platform driver for Intel Low Power Subsystem PWM controller.
350
351 To compile this driver as a module, choose M here: the module
352 will be called pwm-lpss-platform.
353
354config PWM_MESON
355 tristate "Amlogic Meson PWM driver"
356 depends on ARCH_MESON || COMPILE_TEST
357 depends on COMMON_CLK && HAS_IOMEM
358 help
359 The platform driver for Amlogic Meson PWM controller.
360
361 To compile this driver as a module, choose M here: the module
362 will be called pwm-meson.
363
364config PWM_MTK_DISP
365 tristate "MediaTek display PWM driver"
366 depends on ARCH_MEDIATEK || COMPILE_TEST
367 depends on HAS_IOMEM
368 help
369 Generic PWM framework driver for MediaTek disp-pwm device.
370 The PWM is used to control the backlight brightness for display.
371
372 To compile this driver as a module, choose M here: the module
373 will be called pwm-mtk-disp.
374
375config PWM_MEDIATEK
376 tristate "MediaTek PWM support"
377 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST
378 depends on HAS_IOMEM
379 help
380 Generic PWM framework driver for Mediatek ARM SoC.
381
382 To compile this driver as a module, choose M here: the module
383 will be called pwm-mediatek.
384
385config PWM_MXS
386 tristate "Freescale MXS PWM support"
387 depends on ARCH_MXS || COMPILE_TEST
388 depends on HAS_IOMEM && OF
389 select STMP_DEVICE
390 help
391 Generic PWM framework driver for Freescale MXS.
392
393 To compile this driver as a module, choose M here: the module
394 will be called pwm-mxs.
395
396config PWM_NTXEC
397 tristate "Netronix embedded controller PWM support"
398 depends on MFD_NTXEC
399 help
400 Say yes here if you want to support the PWM output of the embedded
401 controller found in certain e-book readers designed by the original
402 design manufacturer Netronix.
403
404config PWM_OMAP_DMTIMER
405 tristate "OMAP Dual-Mode Timer PWM support"
406 depends on OF
407 depends on OMAP_DM_TIMER || COMPILE_TEST
408 help
409 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output
410
411 To compile this driver as a module, choose M here: the module
412 will be called pwm-omap-dmtimer
413
414config PWM_PCA9685
415 tristate "NXP PCA9685 PWM driver"
416 depends on I2C
417 select REGMAP_I2C
418 help
419 Generic PWM framework driver for NXP PCA9685 LED controller.
420
421 To compile this driver as a module, choose M here: the module
422 will be called pwm-pca9685.
423
424config PWM_PXA
425 tristate "PXA PWM support"
426 depends on ARCH_PXA || COMPILE_TEST
427 depends on HAS_IOMEM
428 help
429 Generic PWM framework driver for PXA.
430
431 To compile this driver as a module, choose M here: the module
432 will be called pwm-pxa.
433
434config PWM_RASPBERRYPI_POE
435 tristate "Raspberry Pi Firwmware PoE Hat PWM support"
436 # Make sure not 'y' when RASPBERRYPI_FIRMWARE is 'm'. This can only
437 # happen when COMPILE_TEST=y, hence the added !RASPBERRYPI_FIRMWARE.
438 depends on RASPBERRYPI_FIRMWARE || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE)
439 help
440 Enable Raspberry Pi firmware controller PWM bus used to control the
441 official RPI PoE hat
442
443config PWM_RCAR
444 tristate "Renesas R-Car PWM support"
445 depends on ARCH_RENESAS || COMPILE_TEST
446 depends on HAS_IOMEM
447 help
448 This driver exposes the PWM Timer controller found in Renesas
449 R-Car chips through the PWM API.
450
451 To compile this driver as a module, choose M here: the module
452 will be called pwm-rcar.
453
454config PWM_RENESAS_TPU
455 tristate "Renesas TPU PWM support"
456 depends on ARCH_RENESAS || COMPILE_TEST
457 depends on HAS_IOMEM
458 help
459 This driver exposes the Timer Pulse Unit (TPU) PWM controller found
460 in Renesas chips through the PWM API.
461
462 To compile this driver as a module, choose M here: the module
463 will be called pwm-renesas-tpu.
464
465config PWM_ROCKCHIP
466 tristate "Rockchip PWM support"
467 depends on ARCH_ROCKCHIP || COMPILE_TEST
468 depends on HAS_IOMEM
469 help
470 Generic PWM framework driver for the PWM controller found on
471 Rockchip SoCs.
472
473config PWM_SAMSUNG
474 tristate "Samsung PWM support"
475 depends on PLAT_SAMSUNG || ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST
476 depends on HAS_IOMEM
477 help
478 Generic PWM framework driver for Samsung.
479
480 To compile this driver as a module, choose M here: the module
481 will be called pwm-samsung.
482
483config PWM_SIFIVE
484 tristate "SiFive PWM support"
485 depends on OF
486 depends on COMMON_CLK && HAS_IOMEM
487 depends on RISCV || COMPILE_TEST
488 help
489 Generic PWM framework driver for SiFive SoCs.
490
491 To compile this driver as a module, choose M here: the module
492 will be called pwm-sifive.
493
494config PWM_SL28CPLD
495 tristate "Kontron sl28cpld PWM support"
496 depends on MFD_SL28CPLD || COMPILE_TEST
497 help
498 Generic PWM framework driver for board management controller
499 found on the Kontron sl28 CPLD.
500
501 To compile this driver as a module, choose M here: the module
502 will be called pwm-sl28cpld.
503
504config PWM_SPEAR
505 tristate "STMicroelectronics SPEAr PWM support"
506 depends on PLAT_SPEAR || COMPILE_TEST
507 depends on HAS_IOMEM && OF
508 help
509 Generic PWM framework driver for the PWM controller on ST
510 SPEAr SoCs.
511
512 To compile this driver as a module, choose M here: the module
513 will be called pwm-spear.
514
515config PWM_SPRD
516 tristate "Spreadtrum PWM support"
517 depends on ARCH_SPRD || COMPILE_TEST
518 depends on HAS_IOMEM
519 help
520 Generic PWM framework driver for the PWM controller on
521 Spreadtrum SoCs.
522
523 To compile this driver as a module, choose M here: the module
524 will be called pwm-sprd.
525
526config PWM_STI
527 tristate "STiH4xx PWM support"
528 depends on ARCH_STI || COMPILE_TEST
529 depends on HAS_IOMEM && OF
530 help
531 Generic PWM framework driver for STiH4xx SoCs.
532
533 To compile this driver as a module, choose M here: the module
534 will be called pwm-sti.
535
536config PWM_STM32
537 tristate "STMicroelectronics STM32 PWM"
538 depends on MFD_STM32_TIMERS || COMPILE_TEST
539 help
540 Generic PWM framework driver for STM32 SoCs.
541
542 To compile this driver as a module, choose M here: the module
543 will be called pwm-stm32.
544
545config PWM_STM32_LP
546 tristate "STMicroelectronics STM32 PWM LP"
547 depends on MFD_STM32_LPTIMER || COMPILE_TEST
548 help
549 Generic PWM framework driver for STMicroelectronics STM32 SoCs
550 with Low-Power Timer (LPTIM).
551
552 To compile this driver as a module, choose M here: the module
553 will be called pwm-stm32-lp.
554
555config PWM_STMPE
556 bool "STMPE expander PWM export"
557 depends on MFD_STMPE
558 help
559 This enables support for the PWMs found in the STMPE I/O
560 expanders.
561
562config PWM_SUN4I
563 tristate "Allwinner PWM support"
564 depends on ARCH_SUNXI || COMPILE_TEST
565 depends on HAS_IOMEM && COMMON_CLK
566 help
567 Generic PWM framework driver for Allwinner SoCs.
568
569 To compile this driver as a module, choose M here: the module
570 will be called pwm-sun4i.
571
572config PWM_TEGRA
573 tristate "NVIDIA Tegra PWM support"
574 depends on ARCH_TEGRA || COMPILE_TEST
575 depends on HAS_IOMEM
576 help
577 Generic PWM framework driver for the PWFM controller found on NVIDIA
578 Tegra SoCs.
579
580 To compile this driver as a module, choose M here: the module
581 will be called pwm-tegra.
582
583config PWM_TIECAP
584 tristate "ECAP PWM support"
585 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
586 depends on HAS_IOMEM
587 help
588 PWM driver support for the ECAP APWM controller found on TI SOCs
589
590 To compile this driver as a module, choose M here: the module
591 will be called pwm-tiecap.
592
593config PWM_TIEHRPWM
594 tristate "EHRPWM PWM support"
595 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3 || COMPILE_TEST
596 depends on HAS_IOMEM
597 help
598 PWM driver support for the EHRPWM controller found on TI SOCs
599
600 To compile this driver as a module, choose M here: the module
601 will be called pwm-tiehrpwm.
602
603config PWM_TWL
604 tristate "TWL4030/6030 PWM support"
605 depends on TWL4030_CORE
606 help
607 Generic PWM framework driver for TWL4030/6030.
608
609 To compile this driver as a module, choose M here: the module
610 will be called pwm-twl.
611
612config PWM_TWL_LED
613 tristate "TWL4030/6030 PWM support for LED drivers"
614 depends on TWL4030_CORE
615 help
616 Generic PWM framework driver for TWL4030/6030 LED terminals.
617
618 To compile this driver as a module, choose M here: the module
619 will be called pwm-twl-led.
620
621config PWM_VISCONTI
622 tristate "Toshiba Visconti PWM support"
623 depends on ARCH_VISCONTI || COMPILE_TEST
624 help
625 PWM Subsystem driver support for Toshiba Visconti SoCs.
626
627 To compile this driver as a module, choose M here: the module
628 will be called pwm-visconti.
629
630config PWM_VT8500
631 tristate "vt8500 PWM support"
632 depends on ARCH_VT8500 || COMPILE_TEST
633 depends on HAS_IOMEM
634 help
635 Generic PWM framework driver for vt8500.
636
637 To compile this driver as a module, choose M here: the module
638 will be called pwm-vt8500.
639
640endif