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1 # SPDX-License-Identifier: GPL-2.0-only
2 menuconfig 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
30 if PWM
31
32 config PWM_SYSFS
33 bool
34 default y if SYSFS
35
36 config PWM_AB8500
37 tristate "AB8500 PWM support"
38 depends on AB8500_CORE && ARCH_U8500
39 help
40 Generic PWM framework driver for Analog Baseband AB8500.
41
42 To compile this driver as a module, choose M here: the module
43 will be called pwm-ab8500.
44
45 config PWM_ATMEL
46 tristate "Atmel PWM support"
47 depends on ARCH_AT91
48 help
49 Generic PWM framework driver for Atmel SoC.
50
51 To compile this driver as a module, choose M here: the module
52 will be called pwm-atmel.
53
54 config PWM_ATMEL_HLCDC_PWM
55 tristate "Atmel HLCDC PWM support"
56 depends on MFD_ATMEL_HLCDC
57 depends on HAVE_CLK
58 help
59 Generic PWM framework driver for the PWM output of the HLCDC
60 (Atmel High-end LCD Controller). This PWM output is mainly used
61 to control the LCD backlight.
62
63 To compile this driver as a module, choose M here: the module
64 will be called pwm-atmel-hlcdc.
65
66 config PWM_ATMEL_TCB
67 tristate "Atmel TC Block PWM support"
68 depends on ATMEL_TCLIB && OF
69 help
70 Generic PWM framework driver for Atmel Timer Counter Block.
71
72 A Timer Counter Block provides 6 PWM devices grouped by 2.
73 Devices in a given group must have the same period.
74
75 To compile this driver as a module, choose M here: the module
76 will be called pwm-atmel-tcb.
77
78 config PWM_BCM_IPROC
79 tristate "iProc PWM support"
80 depends on ARCH_BCM_IPROC || COMPILE_TEST
81 depends on COMMON_CLK
82 default ARCH_BCM_IPROC
83 help
84 Generic PWM framework driver for Broadcom iProc PWM block. This
85 block is used in Broadcom iProc SoC's.
86
87 To compile this driver as a module, choose M here: the module
88 will be called pwm-bcm-iproc.
89
90 config PWM_BCM_KONA
91 tristate "Kona PWM support"
92 depends on ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS || COMPILE_TEST
93 depends on HAVE_CLK && HAS_IOMEM
94 default ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS
95 help
96 Generic PWM framework driver for Broadcom Kona PWM block.
97
98 To compile this driver as a module, choose M here: the module
99 will be called pwm-bcm-kona.
100
101 config PWM_BCM2835
102 tristate "BCM2835 PWM support"
103 depends on ARCH_BCM2835
104 help
105 PWM framework driver for BCM2835 controller (Raspberry Pi)
106
107 To compile this driver as a module, choose M here: the module
108 will be called pwm-bcm2835.
109
110 config PWM_BERLIN
111 tristate "Marvell Berlin PWM support"
112 depends on ARCH_BERLIN
113 help
114 PWM framework driver for Marvell Berlin SoCs.
115
116 To compile this driver as a module, choose M here: the module
117 will be called pwm-berlin.
118
119 config PWM_BRCMSTB
120 tristate "Broadcom STB PWM support"
121 depends on ARCH_BRCMSTB || BMIPS_GENERIC
122 help
123 Generic PWM framework driver for the Broadcom Set-top-Box
124 SoCs (BCM7xxx).
125
126 To compile this driver as a module, choose M Here: the module
127 will be called pwm-brcmstb.c.
128
129 config PWM_CLPS711X
130 tristate "CLPS711X PWM support"
131 depends on ARCH_CLPS711X || COMPILE_TEST
132 depends on HAS_IOMEM
133 help
134 Generic PWM framework driver for Cirrus Logic CLPS711X.
135
136 To compile this driver as a module, choose M here: the module
137 will be called pwm-clps711x.
138
139 config PWM_CRC
140 bool "Intel Crystalcove (CRC) PWM support"
141 depends on X86 && INTEL_SOC_PMIC
142 help
143 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM
144 control.
145
146 config PWM_CROS_EC
147 tristate "ChromeOS EC PWM driver"
148 depends on MFD_CROS_EC
149 help
150 PWM driver for exposing a PWM attached to the ChromeOS Embedded
151 Controller.
152
153 config PWM_EP93XX
154 tristate "Cirrus Logic EP93xx PWM support"
155 depends on ARCH_EP93XX
156 help
157 Generic PWM framework driver for Cirrus Logic EP93xx.
158
159 To compile this driver as a module, choose M here: the module
160 will be called pwm-ep93xx.
161
162 config PWM_FSL_FTM
163 tristate "Freescale FlexTimer Module (FTM) PWM support"
164 depends on HAS_IOMEM
165 depends on OF
166 select REGMAP_MMIO
167 help
168 Generic FTM PWM framework driver for Freescale VF610 and
169 Layerscape LS-1 SoCs.
170
171 To compile this driver as a module, choose M here: the module
172 will be called pwm-fsl-ftm.
173
174 config PWM_HIBVT
175 tristate "HiSilicon BVT PWM support"
176 depends on ARCH_HISI || COMPILE_TEST
177 help
178 Generic PWM framework driver for HiSilicon BVT SoCs.
179
180 To compile this driver as a module, choose M here: the module
181 will be called pwm-hibvt.
182
183 config PWM_IMG
184 tristate "Imagination Technologies PWM driver"
185 depends on HAS_IOMEM
186 depends on MFD_SYSCON
187 depends on COMMON_CLK
188 depends on MIPS || COMPILE_TEST
189 help
190 Generic PWM framework driver for Imagination Technologies
191 PWM block which supports 4 channels.
192
193 To compile this driver as a module, choose M here: the module
194 will be called pwm-img
195
196 config PWM_IMX1
197 tristate "i.MX1 PWM support"
198 depends on ARCH_MXC
199 help
200 Generic PWM framework driver for i.MX1 and i.MX21
201
202 To compile this driver as a module, choose M here: the module
203 will be called pwm-imx1.
204
205 config PWM_IMX27
206 tristate "i.MX27 PWM support"
207 depends on ARCH_MXC
208 help
209 Generic PWM framework driver for i.MX27 and later i.MX SoCs.
210
211 To compile this driver as a module, choose M here: the module
212 will be called pwm-imx27.
213
214 config PWM_IMX_TPM
215 tristate "i.MX TPM PWM support"
216 depends on ARCH_MXC || COMPILE_TEST
217 depends on HAVE_CLK && HAS_IOMEM
218 help
219 Generic PWM framework driver for i.MX7ULP TPM module, TPM's full
220 name is Low Power Timer/Pulse Width Modulation Module.
221
222 To compile this driver as a module, choose M here: the module
223 will be called pwm-imx-tpm.
224
225 config PWM_JZ4740
226 tristate "Ingenic JZ47xx PWM support"
227 depends on MACH_INGENIC
228 help
229 Generic PWM framework driver for Ingenic JZ47xx based
230 machines.
231
232 To compile this driver as a module, choose M here: the module
233 will be called pwm-jz4740.
234
235 config PWM_LP3943
236 tristate "TI/National Semiconductor LP3943 PWM support"
237 depends on MFD_LP3943
238 help
239 Generic PWM framework driver for LP3943 which supports two PWM
240 channels.
241
242 To compile this driver as a module, choose M here: the module
243 will be called pwm-lp3943.
244
245 config PWM_LPC18XX_SCT
246 tristate "LPC18xx/43xx PWM/SCT support"
247 depends on ARCH_LPC18XX
248 help
249 Generic PWM framework driver for NXP LPC18xx PWM/SCT which
250 supports 16 channels.
251 A maximum of 15 channels can be requested simultaneously and
252 must have the same period.
253
254 To compile this driver as a module, choose M here: the module
255 will be called pwm-lpc18xx-sct.
256
257 config PWM_LPC32XX
258 tristate "LPC32XX PWM support"
259 depends on ARCH_LPC32XX
260 help
261 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two
262 PWM controllers.
263
264 To compile this driver as a module, choose M here: the module
265 will be called pwm-lpc32xx.
266
267 config PWM_LPSS
268 tristate
269
270 config PWM_LPSS_PCI
271 tristate "Intel LPSS PWM PCI driver"
272 depends on X86 && PCI
273 select PWM_LPSS
274 help
275 The PCI driver for Intel Low Power Subsystem PWM controller.
276
277 To compile this driver as a module, choose M here: the module
278 will be called pwm-lpss-pci.
279
280 config PWM_LPSS_PLATFORM
281 tristate "Intel LPSS PWM platform driver"
282 depends on X86 && ACPI
283 select PWM_LPSS
284 help
285 The platform driver for Intel Low Power Subsystem PWM controller.
286
287 To compile this driver as a module, choose M here: the module
288 will be called pwm-lpss-platform.
289
290 config PWM_MESON
291 tristate "Amlogic Meson PWM driver"
292 depends on ARCH_MESON
293 help
294 The platform driver for Amlogic Meson PWM controller.
295
296 To compile this driver as a module, choose M here: the module
297 will be called pwm-meson.
298
299 config PWM_MTK_DISP
300 tristate "MediaTek display PWM driver"
301 depends on ARCH_MEDIATEK || COMPILE_TEST
302 depends on HAS_IOMEM
303 help
304 Generic PWM framework driver for MediaTek disp-pwm device.
305 The PWM is used to control the backlight brightness for display.
306
307 To compile this driver as a module, choose M here: the module
308 will be called pwm-mtk-disp.
309
310 config PWM_MEDIATEK
311 tristate "MediaTek PWM support"
312 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST
313 help
314 Generic PWM framework driver for Mediatek ARM SoC.
315
316 To compile this driver as a module, choose M here: the module
317 will be called pwm-mediatek.
318
319 config PWM_MXS
320 tristate "Freescale MXS PWM support"
321 depends on ARCH_MXS && OF
322 select STMP_DEVICE
323 help
324 Generic PWM framework driver for Freescale MXS.
325
326 To compile this driver as a module, choose M here: the module
327 will be called pwm-mxs.
328
329 config PWM_OMAP_DMTIMER
330 tristate "OMAP Dual-Mode Timer PWM support"
331 depends on OF && ARCH_OMAP && OMAP_DM_TIMER
332 help
333 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output
334
335 To compile this driver as a module, choose M here: the module
336 will be called pwm-omap-dmtimer
337
338 config PWM_PCA9685
339 tristate "NXP PCA9685 PWM driver"
340 depends on I2C
341 select REGMAP_I2C
342 help
343 Generic PWM framework driver for NXP PCA9685 LED controller.
344
345 To compile this driver as a module, choose M here: the module
346 will be called pwm-pca9685.
347
348 config PWM_PUV3
349 tristate "PKUnity NetBook-0916 PWM support"
350 depends on ARCH_PUV3
351 help
352 Generic PWM framework driver for PKUnity NetBook-0916.
353
354 To compile this driver as a module, choose M here: the module
355 will be called pwm-puv3.
356
357 config PWM_PXA
358 tristate "PXA PWM support"
359 depends on ARCH_PXA
360 help
361 Generic PWM framework driver for PXA.
362
363 To compile this driver as a module, choose M here: the module
364 will be called pwm-pxa.
365
366 config PWM_RCAR
367 tristate "Renesas R-Car PWM support"
368 depends on ARCH_RENESAS || COMPILE_TEST
369 depends on HAS_IOMEM
370 help
371 This driver exposes the PWM Timer controller found in Renesas
372 R-Car chips through the PWM API.
373
374 To compile this driver as a module, choose M here: the module
375 will be called pwm-rcar.
376
377 config PWM_RENESAS_TPU
378 tristate "Renesas TPU PWM support"
379 depends on ARCH_RENESAS || COMPILE_TEST
380 depends on HAS_IOMEM
381 help
382 This driver exposes the Timer Pulse Unit (TPU) PWM controller found
383 in Renesas chips through the PWM API.
384
385 To compile this driver as a module, choose M here: the module
386 will be called pwm-renesas-tpu.
387
388 config PWM_ROCKCHIP
389 tristate "Rockchip PWM support"
390 depends on ARCH_ROCKCHIP
391 help
392 Generic PWM framework driver for the PWM controller found on
393 Rockchip SoCs.
394
395 config PWM_SAMSUNG
396 tristate "Samsung PWM support"
397 depends on PLAT_SAMSUNG || ARCH_EXYNOS
398 help
399 Generic PWM framework driver for Samsung.
400
401 To compile this driver as a module, choose M here: the module
402 will be called pwm-samsung.
403
404 config PWM_SPEAR
405 tristate "STMicroelectronics SPEAr PWM support"
406 depends on PLAT_SPEAR
407 depends on OF
408 help
409 Generic PWM framework driver for the PWM controller on ST
410 SPEAr SoCs.
411
412 To compile this driver as a module, choose M here: the module
413 will be called pwm-spear.
414
415 config PWM_STI
416 tristate "STiH4xx PWM support"
417 depends on ARCH_STI
418 depends on OF
419 help
420 Generic PWM framework driver for STiH4xx SoCs.
421
422 To compile this driver as a module, choose M here: the module
423 will be called pwm-sti.
424
425 config PWM_STM32
426 tristate "STMicroelectronics STM32 PWM"
427 depends on MFD_STM32_TIMERS
428 help
429 Generic PWM framework driver for STM32 SoCs.
430
431 To compile this driver as a module, choose M here: the module
432 will be called pwm-stm32.
433
434 config PWM_STM32_LP
435 tristate "STMicroelectronics STM32 PWM LP"
436 depends on MFD_STM32_LPTIMER || COMPILE_TEST
437 help
438 Generic PWM framework driver for STMicroelectronics STM32 SoCs
439 with Low-Power Timer (LPTIM).
440
441 To compile this driver as a module, choose M here: the module
442 will be called pwm-stm32-lp.
443
444 config PWM_STMPE
445 bool "STMPE expander PWM export"
446 depends on MFD_STMPE
447 help
448 This enables support for the PWMs found in the STMPE I/O
449 expanders.
450
451 config PWM_SUN4I
452 tristate "Allwinner PWM support"
453 depends on ARCH_SUNXI || COMPILE_TEST
454 depends on HAS_IOMEM && COMMON_CLK
455 help
456 Generic PWM framework driver for Allwinner SoCs.
457
458 To compile this driver as a module, choose M here: the module
459 will be called pwm-sun4i.
460
461 config PWM_TEGRA
462 tristate "NVIDIA Tegra PWM support"
463 depends on ARCH_TEGRA
464 help
465 Generic PWM framework driver for the PWFM controller found on NVIDIA
466 Tegra SoCs.
467
468 To compile this driver as a module, choose M here: the module
469 will be called pwm-tegra.
470
471 config PWM_TIECAP
472 tristate "ECAP PWM support"
473 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3
474 help
475 PWM driver support for the ECAP APWM controller found on TI SOCs
476
477 To compile this driver as a module, choose M here: the module
478 will be called pwm-tiecap.
479
480 config PWM_TIEHRPWM
481 tristate "EHRPWM PWM support"
482 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3
483 help
484 PWM driver support for the EHRPWM controller found on TI SOCs
485
486 To compile this driver as a module, choose M here: the module
487 will be called pwm-tiehrpwm.
488
489 config PWM_TIPWMSS
490 bool
491 default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM)
492 help
493 PWM Subsystem driver support for AM33xx SOC.
494
495 PWM submodules require PWM config space access from submodule
496 drivers and require common parent driver support.
497
498 config PWM_TWL
499 tristate "TWL4030/6030 PWM support"
500 depends on TWL4030_CORE
501 help
502 Generic PWM framework driver for TWL4030/6030.
503
504 To compile this driver as a module, choose M here: the module
505 will be called pwm-twl.
506
507 config PWM_TWL_LED
508 tristate "TWL4030/6030 PWM support for LED drivers"
509 depends on TWL4030_CORE
510 help
511 Generic PWM framework driver for TWL4030/6030 LED terminals.
512
513 To compile this driver as a module, choose M here: the module
514 will be called pwm-twl-led.
515
516 config PWM_VT8500
517 tristate "vt8500 PWM support"
518 depends on ARCH_VT8500
519 help
520 Generic PWM framework driver for vt8500.
521
522 To compile this driver as a module, choose M here: the module
523 will be called pwm-vt8500.
524
525 config PWM_ZX
526 tristate "ZTE ZX PWM support"
527 depends on ARCH_ZX
528 help
529 Generic PWM framework driver for ZTE ZX family SoCs.
530
531 To compile this driver as a module, choose M here: the module
532 will be called pwm-zx.
533
534 endif