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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_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_CLK
144 tristate "Clock based PWM support"
145 depends on HAVE_CLK || COMPILE_TEST
146 help
147 Generic PWM framework driver for outputs that can be
148 muxed to clocks.
149
150 To compile this driver as a module, choose M here: the module
151 will be called pwm-clk.
152
153config PWM_CLPS711X
154 tristate "CLPS711X PWM support"
155 depends on ARCH_CLPS711X || COMPILE_TEST
156 depends on HAS_IOMEM
157 help
158 Generic PWM framework driver for Cirrus Logic CLPS711X.
159
160 To compile this driver as a module, choose M here: the module
161 will be called pwm-clps711x.
162
163config PWM_CRC
164 bool "Intel Crystalcove (CRC) PWM support"
165 depends on X86 && INTEL_SOC_PMIC
166 help
167 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM
168 control.
169
170config PWM_CROS_EC
171 tristate "ChromeOS EC PWM driver"
172 depends on CROS_EC
173 help
174 PWM driver for exposing a PWM attached to the ChromeOS Embedded
175 Controller.
176
177config PWM_DWC
178 tristate "DesignWare PWM Controller"
179 depends on PCI
180 help
181 PWM driver for Synopsys DWC PWM Controller attached to a PCI bus.
182
183 To compile this driver as a module, choose M here: the module
184 will be called pwm-dwc.
185
186config PWM_EP93XX
187 tristate "Cirrus Logic EP93xx PWM support"
188 depends on ARCH_EP93XX || COMPILE_TEST
189 depends on HAS_IOMEM
190 help
191 Generic PWM framework driver for Cirrus Logic EP93xx.
192
193 To compile this driver as a module, choose M here: the module
194 will be called pwm-ep93xx.
195
196config PWM_FSL_FTM
197 tristate "Freescale FlexTimer Module (FTM) PWM support"
198 depends on HAS_IOMEM
199 depends on OF
200 select REGMAP_MMIO
201 help
202 Generic FTM PWM framework driver for Freescale VF610 and
203 Layerscape LS-1 SoCs.
204
205 To compile this driver as a module, choose M here: the module
206 will be called pwm-fsl-ftm.
207
208config PWM_HIBVT
209 tristate "HiSilicon BVT PWM support"
210 depends on ARCH_HISI || COMPILE_TEST
211 depends on HAS_IOMEM
212 help
213 Generic PWM framework driver for HiSilicon BVT SoCs.
214
215 To compile this driver as a module, choose M here: the module
216 will be called pwm-hibvt.
217
218config PWM_IMG
219 tristate "Imagination Technologies PWM driver"
220 depends on HAS_IOMEM
221 depends on MFD_SYSCON
222 depends on COMMON_CLK
223 depends on MIPS || COMPILE_TEST
224 help
225 Generic PWM framework driver for Imagination Technologies
226 PWM block which supports 4 channels.
227
228 To compile this driver as a module, choose M here: the module
229 will be called pwm-img
230
231config PWM_IMX1
232 tristate "i.MX1 PWM support"
233 depends on ARCH_MXC || COMPILE_TEST
234 depends on HAS_IOMEM
235 help
236 Generic PWM framework driver for i.MX1 and i.MX21
237
238 To compile this driver as a module, choose M here: the module
239 will be called pwm-imx1.
240
241config PWM_IMX27
242 tristate "i.MX27 PWM support"
243 depends on ARCH_MXC || COMPILE_TEST
244 depends on HAS_IOMEM
245 help
246 Generic PWM framework driver for i.MX27 and later i.MX SoCs.
247
248 To compile this driver as a module, choose M here: the module
249 will be called pwm-imx27.
250
251config PWM_IMX_TPM
252 tristate "i.MX TPM PWM support"
253 depends on ARCH_MXC || COMPILE_TEST
254 depends on HAVE_CLK && HAS_IOMEM
255 help
256 Generic PWM framework driver for i.MX7ULP TPM module, TPM's full
257 name is Low Power Timer/Pulse Width Modulation Module.
258
259 To compile this driver as a module, choose M here: the module
260 will be called pwm-imx-tpm.
261
262config PWM_INTEL_LGM
263 tristate "Intel LGM PWM support"
264 depends on HAS_IOMEM
265 depends on (OF && X86) || COMPILE_TEST
266 select REGMAP_MMIO
267 help
268 Generic PWM fan controller driver for LGM SoC.
269
270 To compile this driver as a module, choose M here: the module
271 will be called pwm-intel-lgm.
272
273config PWM_IQS620A
274 tristate "Azoteq IQS620A PWM support"
275 depends on MFD_IQS62X || COMPILE_TEST
276 help
277 Generic PWM framework driver for the Azoteq IQS620A multi-function
278 sensor.
279
280 To compile this driver as a module, choose M here: the module will
281 be called pwm-iqs620a.
282
283config PWM_JZ4740
284 tristate "Ingenic JZ47xx PWM support"
285 depends on MACH_INGENIC || COMPILE_TEST
286 depends on COMMON_CLK && OF
287 select MFD_SYSCON
288 help
289 Generic PWM framework driver for Ingenic JZ47xx based
290 machines.
291
292 To compile this driver as a module, choose M here: the module
293 will be called pwm-jz4740.
294
295config PWM_KEEMBAY
296 tristate "Intel Keem Bay PWM driver"
297 depends on ARCH_KEEMBAY || COMPILE_TEST
298 depends on COMMON_CLK && HAS_IOMEM
299 help
300 The platform driver for Intel Keem Bay PWM controller.
301
302 To compile this driver as a module, choose M here: the module
303 will be called pwm-keembay.
304
305config PWM_LP3943
306 tristate "TI/National Semiconductor LP3943 PWM support"
307 depends on MFD_LP3943
308 help
309 Generic PWM framework driver for LP3943 which supports two PWM
310 channels.
311
312 To compile this driver as a module, choose M here: the module
313 will be called pwm-lp3943.
314
315config PWM_LPC18XX_SCT
316 tristate "LPC18xx/43xx PWM/SCT support"
317 depends on ARCH_LPC18XX || COMPILE_TEST
318 depends on HAS_IOMEM
319 help
320 Generic PWM framework driver for NXP LPC18xx PWM/SCT which
321 supports 16 channels.
322 A maximum of 15 channels can be requested simultaneously and
323 must have the same period.
324
325 To compile this driver as a module, choose M here: the module
326 will be called pwm-lpc18xx-sct.
327
328config PWM_LPC32XX
329 tristate "LPC32XX PWM support"
330 depends on ARCH_LPC32XX || COMPILE_TEST
331 depends on HAS_IOMEM
332 help
333 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two
334 PWM controllers.
335
336 To compile this driver as a module, choose M here: the module
337 will be called pwm-lpc32xx.
338
339config PWM_LPSS
340 depends on HAS_IOMEM
341 tristate
342
343config PWM_LPSS_PCI
344 tristate "Intel LPSS PWM PCI driver"
345 depends on X86 || COMPILE_TEST
346 depends on HAS_IOMEM && PCI
347 select PWM_LPSS
348 help
349 The PCI 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-pci.
353
354config PWM_LPSS_PLATFORM
355 tristate "Intel LPSS PWM platform driver"
356 depends on (X86 && ACPI) || COMPILE_TEST
357 depends on HAS_IOMEM
358 select PWM_LPSS
359 help
360 The platform driver for Intel Low Power Subsystem PWM controller.
361
362 To compile this driver as a module, choose M here: the module
363 will be called pwm-lpss-platform.
364
365config PWM_MESON
366 tristate "Amlogic Meson PWM driver"
367 depends on ARCH_MESON || COMPILE_TEST
368 depends on COMMON_CLK && HAS_IOMEM
369 help
370 The platform driver for Amlogic Meson PWM controller.
371
372 To compile this driver as a module, choose M here: the module
373 will be called pwm-meson.
374
375config PWM_MTK_DISP
376 tristate "MediaTek display PWM driver"
377 depends on ARCH_MEDIATEK || COMPILE_TEST
378 depends on HAS_IOMEM
379 help
380 Generic PWM framework driver for MediaTek disp-pwm device.
381 The PWM is used to control the backlight brightness for display.
382
383 To compile this driver as a module, choose M here: the module
384 will be called pwm-mtk-disp.
385
386config PWM_MEDIATEK
387 tristate "MediaTek PWM support"
388 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST
389 depends on HAS_IOMEM
390 help
391 Generic PWM framework driver for Mediatek ARM SoC.
392
393 To compile this driver as a module, choose M here: the module
394 will be called pwm-mediatek.
395
396config PWM_MXS
397 tristate "Freescale MXS PWM support"
398 depends on ARCH_MXS || COMPILE_TEST
399 depends on HAS_IOMEM && OF
400 select STMP_DEVICE
401 help
402 Generic PWM framework driver for Freescale MXS.
403
404 To compile this driver as a module, choose M here: the module
405 will be called pwm-mxs.
406
407config PWM_NTXEC
408 tristate "Netronix embedded controller PWM support"
409 depends on MFD_NTXEC
410 help
411 Say yes here if you want to support the PWM output of the embedded
412 controller found in certain e-book readers designed by the original
413 design manufacturer Netronix.
414
415config PWM_OMAP_DMTIMER
416 tristate "OMAP Dual-Mode Timer PWM support"
417 depends on OF
418 depends on OMAP_DM_TIMER || COMPILE_TEST
419 help
420 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output
421
422 To compile this driver as a module, choose M here: the module
423 will be called pwm-omap-dmtimer
424
425config PWM_PCA9685
426 tristate "NXP PCA9685 PWM driver"
427 depends on I2C
428 select REGMAP_I2C
429 help
430 Generic PWM framework driver for NXP PCA9685 LED controller.
431
432 To compile this driver as a module, choose M here: the module
433 will be called pwm-pca9685.
434
435config PWM_PXA
436 tristate "PXA PWM support"
437 depends on ARCH_PXA || ARCH_MMP || COMPILE_TEST
438 depends on HAS_IOMEM
439 help
440 Generic PWM framework driver for PXA.
441
442 To compile this driver as a module, choose M here: the module
443 will be called pwm-pxa.
444
445config PWM_RASPBERRYPI_POE
446 tristate "Raspberry Pi Firwmware PoE Hat PWM support"
447 # Make sure not 'y' when RASPBERRYPI_FIRMWARE is 'm'. This can only
448 # happen when COMPILE_TEST=y, hence the added !RASPBERRYPI_FIRMWARE.
449 depends on RASPBERRYPI_FIRMWARE || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE)
450 help
451 Enable Raspberry Pi firmware controller PWM bus used to control the
452 official RPI PoE hat
453
454config PWM_RCAR
455 tristate "Renesas R-Car PWM support"
456 depends on ARCH_RENESAS || COMPILE_TEST
457 depends on HAS_IOMEM
458 help
459 This driver exposes the PWM Timer controller found in Renesas
460 R-Car chips through the PWM API.
461
462 To compile this driver as a module, choose M here: the module
463 will be called pwm-rcar.
464
465config PWM_RENESAS_TPU
466 tristate "Renesas TPU PWM support"
467 depends on ARCH_RENESAS || COMPILE_TEST
468 depends on HAS_IOMEM
469 help
470 This driver exposes the Timer Pulse Unit (TPU) PWM controller found
471 in Renesas chips through the PWM API.
472
473 To compile this driver as a module, choose M here: the module
474 will be called pwm-renesas-tpu.
475
476config PWM_ROCKCHIP
477 tristate "Rockchip PWM support"
478 depends on ARCH_ROCKCHIP || COMPILE_TEST
479 depends on HAS_IOMEM
480 help
481 Generic PWM framework driver for the PWM controller found on
482 Rockchip SoCs.
483
484config PWM_SAMSUNG
485 tristate "Samsung PWM support"
486 depends on PLAT_SAMSUNG || ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST
487 depends on HAS_IOMEM
488 help
489 Generic PWM framework driver for Samsung S3C24xx, S3C64xx, S5Pv210
490 and Exynos SoCs.
491 Choose Y here only if you build for such Samsung SoC.
492
493 To compile this driver as a module, choose M here: the module
494 will be called pwm-samsung.
495
496config PWM_SIFIVE
497 tristate "SiFive PWM support"
498 depends on OF
499 depends on COMMON_CLK && HAS_IOMEM
500 depends on RISCV || COMPILE_TEST
501 help
502 Generic PWM framework driver for SiFive SoCs.
503
504 To compile this driver as a module, choose M here: the module
505 will be called pwm-sifive.
506
507config PWM_SL28CPLD
508 tristate "Kontron sl28cpld PWM support"
509 depends on MFD_SL28CPLD || COMPILE_TEST
510 help
511 Generic PWM framework driver for board management controller
512 found on the Kontron sl28 CPLD.
513
514 To compile this driver as a module, choose M here: the module
515 will be called pwm-sl28cpld.
516
517config PWM_SPEAR
518 tristate "STMicroelectronics SPEAr PWM support"
519 depends on PLAT_SPEAR || COMPILE_TEST
520 depends on HAS_IOMEM && OF
521 help
522 Generic PWM framework driver for the PWM controller on ST
523 SPEAr SoCs.
524
525 To compile this driver as a module, choose M here: the module
526 will be called pwm-spear.
527
528config PWM_SPRD
529 tristate "Spreadtrum PWM support"
530 depends on ARCH_SPRD || COMPILE_TEST
531 depends on HAS_IOMEM
532 help
533 Generic PWM framework driver for the PWM controller on
534 Spreadtrum SoCs.
535
536 To compile this driver as a module, choose M here: the module
537 will be called pwm-sprd.
538
539config PWM_STI
540 tristate "STiH4xx PWM support"
541 depends on ARCH_STI || COMPILE_TEST
542 depends on HAS_IOMEM && OF
543 help
544 Generic PWM framework driver for STiH4xx SoCs.
545
546 To compile this driver as a module, choose M here: the module
547 will be called pwm-sti.
548
549config PWM_STM32
550 tristate "STMicroelectronics STM32 PWM"
551 depends on MFD_STM32_TIMERS || COMPILE_TEST
552 help
553 Generic PWM framework driver for STM32 SoCs.
554
555 To compile this driver as a module, choose M here: the module
556 will be called pwm-stm32.
557
558config PWM_STM32_LP
559 tristate "STMicroelectronics STM32 PWM LP"
560 depends on MFD_STM32_LPTIMER || COMPILE_TEST
561 help
562 Generic PWM framework driver for STMicroelectronics STM32 SoCs
563 with Low-Power Timer (LPTIM).
564
565 To compile this driver as a module, choose M here: the module
566 will be called pwm-stm32-lp.
567
568config PWM_STMPE
569 bool "STMPE expander PWM export"
570 depends on MFD_STMPE
571 help
572 This enables support for the PWMs found in the STMPE I/O
573 expanders.
574
575config PWM_SUN4I
576 tristate "Allwinner PWM support"
577 depends on ARCH_SUNXI || COMPILE_TEST
578 depends on HAS_IOMEM && COMMON_CLK
579 help
580 Generic PWM framework driver for Allwinner SoCs.
581
582 To compile this driver as a module, choose M here: the module
583 will be called pwm-sun4i.
584
585config PWM_SUNPLUS
586 tristate "Sunplus PWM support"
587 depends on ARCH_SUNPLUS || COMPILE_TEST
588 depends on HAS_IOMEM && OF
589 help
590 Generic PWM framework driver for the PWM controller on
591 Sunplus SoCs.
592
593 To compile this driver as a module, choose M here: the module
594 will be called pwm-sunplus.
595
596config PWM_TEGRA
597 tristate "NVIDIA Tegra PWM support"
598 depends on ARCH_TEGRA || COMPILE_TEST
599 depends on HAS_IOMEM
600 help
601 Generic PWM framework driver for the PWFM controller found on NVIDIA
602 Tegra SoCs.
603
604 To compile this driver as a module, choose M here: the module
605 will be called pwm-tegra.
606
607config PWM_TIECAP
608 tristate "ECAP PWM support"
609 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
610 depends on HAS_IOMEM
611 help
612 PWM driver support for the ECAP APWM controller found on TI SOCs
613
614 To compile this driver as a module, choose M here: the module
615 will be called pwm-tiecap.
616
617config PWM_TIEHRPWM
618 tristate "EHRPWM PWM support"
619 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3 || COMPILE_TEST
620 depends on HAS_IOMEM
621 help
622 PWM driver support for the EHRPWM controller found on TI SOCs
623
624 To compile this driver as a module, choose M here: the module
625 will be called pwm-tiehrpwm.
626
627config PWM_TWL
628 tristate "TWL4030/6030 PWM support"
629 depends on TWL4030_CORE
630 help
631 Generic PWM framework driver for TWL4030/6030.
632
633 To compile this driver as a module, choose M here: the module
634 will be called pwm-twl.
635
636config PWM_TWL_LED
637 tristate "TWL4030/6030 PWM support for LED drivers"
638 depends on TWL4030_CORE
639 help
640 Generic PWM framework driver for TWL4030/6030 LED terminals.
641
642 To compile this driver as a module, choose M here: the module
643 will be called pwm-twl-led.
644
645config PWM_VISCONTI
646 tristate "Toshiba Visconti PWM support"
647 depends on ARCH_VISCONTI || COMPILE_TEST
648 help
649 PWM Subsystem driver support for Toshiba Visconti SoCs.
650
651 To compile this driver as a module, choose M here: the module
652 will be called pwm-visconti.
653
654config PWM_VT8500
655 tristate "vt8500 PWM support"
656 depends on ARCH_VT8500 || COMPILE_TEST
657 depends on HAS_IOMEM
658 help
659 Generic PWM framework driver for vt8500.
660
661 To compile this driver as a module, choose M here: the module
662 will be called pwm-vt8500.
663
664config PWM_XILINX
665 tristate "Xilinx AXI Timer PWM support"
666 depends on OF_ADDRESS
667 depends on COMMON_CLK
668 select REGMAP_MMIO
669 help
670 PWM driver for Xilinx LogiCORE IP AXI timers. This timer is
671 typically a soft core which may be present in Xilinx FPGAs.
672 This device may also be present in Microblaze soft processors.
673 If you don't have this IP in your design, choose N.
674
675 To compile this driver as a module, choose M here: the module
676 will be called pwm-xilinx.
677
678endif
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