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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 OF
57 depends on ARCH_AT91 || COMPILE_TEST
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 ATMEL_TCLIB && OF
79 help
80 Generic PWM framework driver for Atmel Timer Counter Block.
81
82 A Timer Counter Block provides 6 PWM devices grouped by 2.
83 Devices in a given group must have the same period.
84
85 To compile this driver as a module, choose M here: the module
86 will be called pwm-atmel-tcb.
87
88config PWM_BCM_IPROC
89 tristate "iProc PWM support"
90 depends on ARCH_BCM_IPROC || COMPILE_TEST
91 depends on COMMON_CLK
92 default ARCH_BCM_IPROC
93 help
94 Generic PWM framework driver for Broadcom iProc PWM block. This
95 block is used in Broadcom iProc SoC's.
96
97 To compile this driver as a module, choose M here: the module
98 will be called pwm-bcm-iproc.
99
100config PWM_BCM_KONA
101 tristate "Kona PWM support"
102 depends on ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS || COMPILE_TEST
103 depends on HAVE_CLK && HAS_IOMEM
104 default ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS
105 help
106 Generic PWM framework driver for Broadcom Kona PWM block.
107
108 To compile this driver as a module, choose M here: the module
109 will be called pwm-bcm-kona.
110
111config PWM_BCM2835
112 tristate "BCM2835 PWM support"
113 depends on ARCH_BCM2835 || ARCH_BRCMSTB || COMPILE_TEST
114 help
115 PWM framework driver for BCM2835 controller (Raspberry Pi)
116
117 To compile this driver as a module, choose M here: the module
118 will be called pwm-bcm2835.
119
120config PWM_BERLIN
121 tristate "Marvell Berlin PWM support"
122 depends on ARCH_BERLIN || COMPILE_TEST
123 help
124 PWM framework driver for Marvell Berlin SoCs.
125
126 To compile this driver as a module, choose M here: the module
127 will be called pwm-berlin.
128
129config PWM_BRCMSTB
130 tristate "Broadcom STB PWM support"
131 depends on ARCH_BRCMSTB || BMIPS_GENERIC || COMPILE_TEST
132 help
133 Generic PWM framework driver for the Broadcom Set-top-Box
134 SoCs (BCM7xxx).
135
136 To compile this driver as a module, choose M Here: the module
137 will be called pwm-brcmstb.c.
138
139config PWM_CLPS711X
140 tristate "CLPS711X PWM support"
141 depends on ARCH_CLPS711X || COMPILE_TEST
142 depends on HAS_IOMEM
143 help
144 Generic PWM framework driver for Cirrus Logic CLPS711X.
145
146 To compile this driver as a module, choose M here: the module
147 will be called pwm-clps711x.
148
149config PWM_CRC
150 bool "Intel Crystalcove (CRC) PWM support"
151 depends on X86 && INTEL_SOC_PMIC
152 help
153 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM
154 control.
155
156config PWM_CROS_EC
157 tristate "ChromeOS EC PWM driver"
158 depends on CROS_EC
159 help
160 PWM driver for exposing a PWM attached to the ChromeOS Embedded
161 Controller.
162
163config PWM_EP93XX
164 tristate "Cirrus Logic EP93xx PWM support"
165 depends on ARCH_EP93XX || COMPILE_TEST
166 help
167 Generic PWM framework driver for Cirrus Logic EP93xx.
168
169 To compile this driver as a module, choose M here: the module
170 will be called pwm-ep93xx.
171
172config PWM_FSL_FTM
173 tristate "Freescale FlexTimer Module (FTM) PWM support"
174 depends on HAS_IOMEM
175 depends on OF
176 select REGMAP_MMIO
177 help
178 Generic FTM PWM framework driver for Freescale VF610 and
179 Layerscape LS-1 SoCs.
180
181 To compile this driver as a module, choose M here: the module
182 will be called pwm-fsl-ftm.
183
184config PWM_HIBVT
185 tristate "HiSilicon BVT PWM support"
186 depends on ARCH_HISI || COMPILE_TEST
187 help
188 Generic PWM framework driver for HiSilicon BVT SoCs.
189
190 To compile this driver as a module, choose M here: the module
191 will be called pwm-hibvt.
192
193config PWM_IMG
194 tristate "Imagination Technologies PWM driver"
195 depends on HAS_IOMEM
196 depends on MFD_SYSCON
197 depends on COMMON_CLK
198 depends on MIPS || COMPILE_TEST
199 help
200 Generic PWM framework driver for Imagination Technologies
201 PWM block which supports 4 channels.
202
203 To compile this driver as a module, choose M here: the module
204 will be called pwm-img
205
206config PWM_IMX1
207 tristate "i.MX1 PWM support"
208 depends on ARCH_MXC || COMPILE_TEST
209 help
210 Generic PWM framework driver for i.MX1 and i.MX21
211
212 To compile this driver as a module, choose M here: the module
213 will be called pwm-imx1.
214
215config PWM_IMX27
216 tristate "i.MX27 PWM support"
217 depends on ARCH_MXC || COMPILE_TEST
218 help
219 Generic PWM framework driver for i.MX27 and later i.MX SoCs.
220
221 To compile this driver as a module, choose M here: the module
222 will be called pwm-imx27.
223
224config PWM_IMX_TPM
225 tristate "i.MX TPM PWM support"
226 depends on ARCH_MXC || COMPILE_TEST
227 depends on HAVE_CLK && HAS_IOMEM
228 help
229 Generic PWM framework driver for i.MX7ULP TPM module, TPM's full
230 name is Low Power Timer/Pulse Width Modulation Module.
231
232 To compile this driver as a module, choose M here: the module
233 will be called pwm-imx-tpm.
234
235config PWM_IQS620A
236 tristate "Azoteq IQS620A PWM support"
237 depends on MFD_IQS62X || COMPILE_TEST
238 help
239 Generic PWM framework driver for the Azoteq IQS620A multi-function
240 sensor.
241
242 To compile this driver as a module, choose M here: the module will
243 be called pwm-iqs620a.
244
245config PWM_JZ4740
246 tristate "Ingenic JZ47xx PWM support"
247 depends on MIPS
248 depends on COMMON_CLK
249 select MFD_SYSCON
250 help
251 Generic PWM framework driver for Ingenic JZ47xx based
252 machines.
253
254 To compile this driver as a module, choose M here: the module
255 will be called pwm-jz4740.
256
257config PWM_LP3943
258 tristate "TI/National Semiconductor LP3943 PWM support"
259 depends on MFD_LP3943
260 help
261 Generic PWM framework driver for LP3943 which supports two PWM
262 channels.
263
264 To compile this driver as a module, choose M here: the module
265 will be called pwm-lp3943.
266
267config PWM_LPC18XX_SCT
268 tristate "LPC18xx/43xx PWM/SCT support"
269 depends on ARCH_LPC18XX || COMPILE_TEST
270 help
271 Generic PWM framework driver for NXP LPC18xx PWM/SCT which
272 supports 16 channels.
273 A maximum of 15 channels can be requested simultaneously and
274 must have the same period.
275
276 To compile this driver as a module, choose M here: the module
277 will be called pwm-lpc18xx-sct.
278
279config PWM_LPC32XX
280 tristate "LPC32XX PWM support"
281 depends on ARCH_LPC32XX || COMPILE_TEST
282 help
283 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two
284 PWM controllers.
285
286 To compile this driver as a module, choose M here: the module
287 will be called pwm-lpc32xx.
288
289config PWM_LPSS
290 tristate
291
292config PWM_LPSS_PCI
293 tristate "Intel LPSS PWM PCI driver"
294 depends on X86 && PCI
295 select PWM_LPSS
296 help
297 The PCI driver for Intel Low Power Subsystem PWM controller.
298
299 To compile this driver as a module, choose M here: the module
300 will be called pwm-lpss-pci.
301
302config PWM_LPSS_PLATFORM
303 tristate "Intel LPSS PWM platform driver"
304 depends on X86 && ACPI
305 select PWM_LPSS
306 help
307 The platform driver for Intel Low Power Subsystem PWM controller.
308
309 To compile this driver as a module, choose M here: the module
310 will be called pwm-lpss-platform.
311
312config PWM_MESON
313 tristate "Amlogic Meson PWM driver"
314 depends on ARCH_MESON || COMPILE_TEST
315 depends on COMMON_CLK
316 help
317 The platform driver for Amlogic Meson PWM controller.
318
319 To compile this driver as a module, choose M here: the module
320 will be called pwm-meson.
321
322config PWM_MTK_DISP
323 tristate "MediaTek display PWM driver"
324 depends on ARCH_MEDIATEK || COMPILE_TEST
325 depends on HAS_IOMEM
326 help
327 Generic PWM framework driver for MediaTek disp-pwm device.
328 The PWM is used to control the backlight brightness for display.
329
330 To compile this driver as a module, choose M here: the module
331 will be called pwm-mtk-disp.
332
333config PWM_MEDIATEK
334 tristate "MediaTek PWM support"
335 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST
336 help
337 Generic PWM framework driver for Mediatek ARM SoC.
338
339 To compile this driver as a module, choose M here: the module
340 will be called pwm-mediatek.
341
342config PWM_MXS
343 tristate "Freescale MXS PWM support"
344 depends on OF
345 depends on ARCH_MXS || COMPILE_TEST
346 select STMP_DEVICE
347 help
348 Generic PWM framework driver for Freescale MXS.
349
350 To compile this driver as a module, choose M here: the module
351 will be called pwm-mxs.
352
353config PWM_OMAP_DMTIMER
354 tristate "OMAP Dual-Mode Timer PWM support"
355 depends on OF
356 depends on OMAP_DM_TIMER || COMPILE_TEST
357 help
358 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output
359
360 To compile this driver as a module, choose M here: the module
361 will be called pwm-omap-dmtimer
362
363config PWM_PCA9685
364 tristate "NXP PCA9685 PWM driver"
365 depends on I2C
366 select REGMAP_I2C
367 help
368 Generic PWM framework driver for NXP PCA9685 LED controller.
369
370 To compile this driver as a module, choose M here: the module
371 will be called pwm-pca9685.
372
373config PWM_PXA
374 tristate "PXA PWM support"
375 depends on ARCH_PXA || COMPILE_TEST
376 help
377 Generic PWM framework driver for PXA.
378
379 To compile this driver as a module, choose M here: the module
380 will be called pwm-pxa.
381
382config PWM_RCAR
383 tristate "Renesas R-Car PWM support"
384 depends on ARCH_RENESAS || COMPILE_TEST
385 depends on HAS_IOMEM
386 help
387 This driver exposes the PWM Timer controller found in Renesas
388 R-Car chips through the PWM API.
389
390 To compile this driver as a module, choose M here: the module
391 will be called pwm-rcar.
392
393config PWM_RENESAS_TPU
394 tristate "Renesas TPU PWM support"
395 depends on ARCH_RENESAS || COMPILE_TEST
396 depends on HAS_IOMEM
397 help
398 This driver exposes the Timer Pulse Unit (TPU) PWM controller found
399 in Renesas chips through the PWM API.
400
401 To compile this driver as a module, choose M here: the module
402 will be called pwm-renesas-tpu.
403
404config PWM_ROCKCHIP
405 tristate "Rockchip PWM support"
406 depends on ARCH_ROCKCHIP || COMPILE_TEST
407 help
408 Generic PWM framework driver for the PWM controller found on
409 Rockchip SoCs.
410
411config PWM_SAMSUNG
412 tristate "Samsung PWM support"
413 depends on PLAT_SAMSUNG || ARCH_EXYNOS || COMPILE_TEST
414 help
415 Generic PWM framework driver for Samsung.
416
417 To compile this driver as a module, choose M here: the module
418 will be called pwm-samsung.
419
420config PWM_SIFIVE
421 tristate "SiFive PWM support"
422 depends on OF
423 depends on COMMON_CLK
424 depends on RISCV || COMPILE_TEST
425 help
426 Generic PWM framework driver for SiFive SoCs.
427
428 To compile this driver as a module, choose M here: the module
429 will be called pwm-sifive.
430
431config PWM_SPEAR
432 tristate "STMicroelectronics SPEAr PWM support"
433 depends on PLAT_SPEAR || COMPILE_TEST
434 depends on OF
435 help
436 Generic PWM framework driver for the PWM controller on ST
437 SPEAr SoCs.
438
439 To compile this driver as a module, choose M here: the module
440 will be called pwm-spear.
441
442config PWM_SPRD
443 tristate "Spreadtrum PWM support"
444 depends on ARCH_SPRD || COMPILE_TEST
445 depends on HAS_IOMEM
446 help
447 Generic PWM framework driver for the PWM controller on
448 Spreadtrum SoCs.
449
450 To compile this driver as a module, choose M here: the module
451 will be called pwm-sprd.
452
453config PWM_STI
454 tristate "STiH4xx PWM support"
455 depends on ARCH_STI || COMPILE_TEST
456 depends on OF
457 help
458 Generic PWM framework driver for STiH4xx SoCs.
459
460 To compile this driver as a module, choose M here: the module
461 will be called pwm-sti.
462
463config PWM_STM32
464 tristate "STMicroelectronics STM32 PWM"
465 depends on MFD_STM32_TIMERS || COMPILE_TEST
466 help
467 Generic PWM framework driver for STM32 SoCs.
468
469 To compile this driver as a module, choose M here: the module
470 will be called pwm-stm32.
471
472config PWM_STM32_LP
473 tristate "STMicroelectronics STM32 PWM LP"
474 depends on MFD_STM32_LPTIMER || COMPILE_TEST
475 help
476 Generic PWM framework driver for STMicroelectronics STM32 SoCs
477 with Low-Power Timer (LPTIM).
478
479 To compile this driver as a module, choose M here: the module
480 will be called pwm-stm32-lp.
481
482config PWM_STMPE
483 bool "STMPE expander PWM export"
484 depends on MFD_STMPE
485 help
486 This enables support for the PWMs found in the STMPE I/O
487 expanders.
488
489config PWM_SUN4I
490 tristate "Allwinner PWM support"
491 depends on ARCH_SUNXI || COMPILE_TEST
492 depends on HAS_IOMEM && COMMON_CLK
493 help
494 Generic PWM framework driver for Allwinner SoCs.
495
496 To compile this driver as a module, choose M here: the module
497 will be called pwm-sun4i.
498
499config PWM_TEGRA
500 tristate "NVIDIA Tegra PWM support"
501 depends on ARCH_TEGRA || COMPILE_TEST
502 help
503 Generic PWM framework driver for the PWFM controller found on NVIDIA
504 Tegra SoCs.
505
506 To compile this driver as a module, choose M here: the module
507 will be called pwm-tegra.
508
509config PWM_TIECAP
510 tristate "ECAP PWM support"
511 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
512 help
513 PWM driver support for the ECAP APWM controller found on TI SOCs
514
515 To compile this driver as a module, choose M here: the module
516 will be called pwm-tiecap.
517
518config PWM_TIEHRPWM
519 tristate "EHRPWM PWM support"
520 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3 || COMPILE_TEST
521 help
522 PWM driver support for the EHRPWM controller found on TI SOCs
523
524 To compile this driver as a module, choose M here: the module
525 will be called pwm-tiehrpwm.
526
527config PWM_TWL
528 tristate "TWL4030/6030 PWM support"
529 depends on TWL4030_CORE
530 help
531 Generic PWM framework driver for TWL4030/6030.
532
533 To compile this driver as a module, choose M here: the module
534 will be called pwm-twl.
535
536config PWM_TWL_LED
537 tristate "TWL4030/6030 PWM support for LED drivers"
538 depends on TWL4030_CORE
539 help
540 Generic PWM framework driver for TWL4030/6030 LED terminals.
541
542 To compile this driver as a module, choose M here: the module
543 will be called pwm-twl-led.
544
545config PWM_VT8500
546 tristate "vt8500 PWM support"
547 depends on ARCH_VT8500 || COMPILE_TEST
548 help
549 Generic PWM framework driver for vt8500.
550
551 To compile this driver as a module, choose M here: the module
552 will be called pwm-vt8500.
553
554config PWM_ZX
555 tristate "ZTE ZX PWM support"
556 depends on ARCH_ZX || COMPILE_TEST
557 help
558 Generic PWM framework driver for ZTE ZX family SoCs.
559
560 To compile this driver as a module, choose M here: the module
561 will be called pwm-zx.
562
563endif