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1menuconfig PWM
2 bool "Pulse-Width Modulation (PWM) Support"
3 help
4 Generic Pulse-Width Modulation (PWM) support.
5
6 In Pulse-Width Modulation, a variation of the width of pulses
7 in a rectangular pulse signal is used as a means to alter the
8 average power of the signal. Applications include efficient
9 power delivery and voltage regulation. In computer systems,
10 PWMs are commonly used to control fans or the brightness of
11 display backlights.
12
13 This framework provides a generic interface to PWM devices
14 within the Linux kernel. On the driver side it provides an API
15 to register and unregister a PWM chip, an abstraction of a PWM
16 controller, that supports one or more PWM devices. Client
17 drivers can request PWM devices and use the generic framework
18 to configure as well as enable and disable them.
19
20 This generic framework replaces the legacy PWM framework which
21 allows only a single driver implementing the required API. Not
22 all legacy implementations have been ported to the framework
23 yet. The framework provides an API that is backward compatible
24 with the legacy framework so that existing client drivers
25 continue to work as expected.
26
27 If unsure, say no.
28
29if PWM
30
31config PWM_SYSFS
32 bool
33 default y if SYSFS
34
35config PWM_AB8500
36 tristate "AB8500 PWM support"
37 depends on AB8500_CORE && ARCH_U8500
38 help
39 Generic PWM framework driver for Analog Baseband AB8500.
40
41 To compile this driver as a module, choose M here: the module
42 will be called pwm-ab8500.
43
44config PWM_ATMEL
45 tristate "Atmel PWM support"
46 depends on ARCH_AT91
47 help
48 Generic PWM framework driver for Atmel SoC.
49
50 To compile this driver as a module, choose M here: the module
51 will be called pwm-atmel.
52
53config PWM_ATMEL_HLCDC_PWM
54 tristate "Atmel HLCDC PWM support"
55 depends on MFD_ATMEL_HLCDC
56 depends on HAVE_CLK
57 help
58 Generic PWM framework driver for the PWM output of the HLCDC
59 (Atmel High-end LCD Controller). This PWM output is mainly used
60 to control the LCD backlight.
61
62 To compile this driver as a module, choose M here: the module
63 will be called pwm-atmel-hlcdc.
64
65config PWM_ATMEL_TCB
66 tristate "Atmel TC Block PWM support"
67 depends on ATMEL_TCLIB && OF
68 help
69 Generic PWM framework driver for Atmel Timer Counter Block.
70
71 A Timer Counter Block provides 6 PWM devices grouped by 2.
72 Devices in a given group must have the same period.
73
74 To compile this driver as a module, choose M here: the module
75 will be called pwm-atmel-tcb.
76
77config PWM_BCM_IPROC
78 tristate "iProc PWM support"
79 depends on ARCH_BCM_IPROC || COMPILE_TEST
80 depends on COMMON_CLK
81 default ARCH_BCM_IPROC
82 help
83 Generic PWM framework driver for Broadcom iProc PWM block. This
84 block is used in Broadcom iProc SoC's.
85
86 To compile this driver as a module, choose M here: the module
87 will be called pwm-bcm-iproc.
88
89config PWM_BCM_KONA
90 tristate "Kona PWM support"
91 depends on ARCH_BCM_MOBILE
92 help
93 Generic PWM framework driver for Broadcom Kona PWM block.
94
95 To compile this driver as a module, choose M here: the module
96 will be called pwm-bcm-kona.
97
98config PWM_BCM2835
99 tristate "BCM2835 PWM support"
100 depends on ARCH_BCM2835
101 help
102 PWM framework driver for BCM2835 controller (Raspberry Pi)
103
104 To compile this driver as a module, choose M here: the module
105 will be called pwm-bcm2835.
106
107config PWM_BERLIN
108 tristate "Marvell Berlin PWM support"
109 depends on ARCH_BERLIN
110 help
111 PWM framework driver for Marvell Berlin SoCs.
112
113 To compile this driver as a module, choose M here: the module
114 will be called pwm-berlin.
115
116config PWM_BRCMSTB
117 tristate "Broadcom STB PWM support"
118 depends on ARCH_BRCMSTB || BMIPS_GENERIC
119 help
120 Generic PWM framework driver for the Broadcom Set-top-Box
121 SoCs (BCM7xxx).
122
123 To compile this driver as a module, choose M Here: the module
124 will be called pwm-brcmstb.c.
125
126config PWM_CLPS711X
127 tristate "CLPS711X PWM support"
128 depends on ARCH_CLPS711X || COMPILE_TEST
129 depends on HAS_IOMEM
130 help
131 Generic PWM framework driver for Cirrus Logic CLPS711X.
132
133 To compile this driver as a module, choose M here: the module
134 will be called pwm-clps711x.
135
136config PWM_CRC
137 bool "Intel Crystalcove (CRC) PWM support"
138 depends on X86 && INTEL_SOC_PMIC
139 help
140 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM
141 control.
142
143config PWM_CROS_EC
144 tristate "ChromeOS EC PWM driver"
145 depends on MFD_CROS_EC
146 help
147 PWM driver for exposing a PWM attached to the ChromeOS Embedded
148 Controller.
149
150config PWM_EP93XX
151 tristate "Cirrus Logic EP93xx PWM support"
152 depends on ARCH_EP93XX
153 help
154 Generic PWM framework driver for Cirrus Logic EP93xx.
155
156 To compile this driver as a module, choose M here: the module
157 will be called pwm-ep93xx.
158
159config PWM_FSL_FTM
160 tristate "Freescale FlexTimer Module (FTM) PWM support"
161 depends on HAS_IOMEM
162 depends on OF
163 select REGMAP_MMIO
164 help
165 Generic FTM PWM framework driver for Freescale VF610 and
166 Layerscape LS-1 SoCs.
167
168 To compile this driver as a module, choose M here: the module
169 will be called pwm-fsl-ftm.
170
171config PWM_HIBVT
172 tristate "HiSilicon BVT PWM support"
173 depends on ARCH_HISI || COMPILE_TEST
174 help
175 Generic PWM framework driver for HiSilicon BVT SoCs.
176
177 To compile this driver as a module, choose M here: the module
178 will be called pwm-hibvt.
179
180config PWM_IMG
181 tristate "Imagination Technologies PWM driver"
182 depends on HAS_IOMEM
183 depends on MFD_SYSCON
184 depends on COMMON_CLK
185 depends on MIPS || COMPILE_TEST
186 help
187 Generic PWM framework driver for Imagination Technologies
188 PWM block which supports 4 channels.
189
190 To compile this driver as a module, choose M here: the module
191 will be called pwm-img
192
193config PWM_IMX
194 tristate "i.MX PWM support"
195 depends on ARCH_MXC
196 help
197 Generic PWM framework driver for i.MX.
198
199 To compile this driver as a module, choose M here: the module
200 will be called pwm-imx.
201
202config PWM_JZ4740
203 tristate "Ingenic JZ47xx PWM support"
204 depends on MACH_INGENIC
205 help
206 Generic PWM framework driver for Ingenic JZ47xx based
207 machines.
208
209 To compile this driver as a module, choose M here: the module
210 will be called pwm-jz4740.
211
212config PWM_LP3943
213 tristate "TI/National Semiconductor LP3943 PWM support"
214 depends on MFD_LP3943
215 help
216 Generic PWM framework driver for LP3943 which supports two PWM
217 channels.
218
219 To compile this driver as a module, choose M here: the module
220 will be called pwm-lp3943.
221
222config PWM_LPC18XX_SCT
223 tristate "LPC18xx/43xx PWM/SCT support"
224 depends on ARCH_LPC18XX
225 help
226 Generic PWM framework driver for NXP LPC18xx PWM/SCT which
227 supports 16 channels.
228 A maximum of 15 channels can be requested simultaneously and
229 must have the same period.
230
231 To compile this driver as a module, choose M here: the module
232 will be called pwm-lpc18xx-sct.
233
234config PWM_LPC32XX
235 tristate "LPC32XX PWM support"
236 depends on ARCH_LPC32XX
237 help
238 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two
239 PWM controllers.
240
241 To compile this driver as a module, choose M here: the module
242 will be called pwm-lpc32xx.
243
244config PWM_LPSS
245 tristate
246
247config PWM_LPSS_PCI
248 tristate "Intel LPSS PWM PCI driver"
249 depends on X86 && PCI
250 select PWM_LPSS
251 help
252 The PCI driver for Intel Low Power Subsystem PWM controller.
253
254 To compile this driver as a module, choose M here: the module
255 will be called pwm-lpss-pci.
256
257config PWM_LPSS_PLATFORM
258 tristate "Intel LPSS PWM platform driver"
259 depends on X86 && ACPI
260 select PWM_LPSS
261 help
262 The platform driver for Intel Low Power Subsystem PWM controller.
263
264 To compile this driver as a module, choose M here: the module
265 will be called pwm-lpss-platform.
266
267config PWM_MESON
268 tristate "Amlogic Meson PWM driver"
269 depends on ARCH_MESON
270 help
271 The platform driver for Amlogic Meson PWM controller.
272
273 To compile this driver as a module, choose M here: the module
274 will be called pwm-meson.
275
276config PWM_MTK_DISP
277 tristate "MediaTek display PWM driver"
278 depends on ARCH_MEDIATEK || COMPILE_TEST
279 depends on HAS_IOMEM
280 help
281 Generic PWM framework driver for MediaTek disp-pwm device.
282 The PWM is used to control the backlight brightness for display.
283
284 To compile this driver as a module, choose M here: the module
285 will be called pwm-mtk-disp.
286
287config PWM_MEDIATEK
288 tristate "MediaTek PWM support"
289 depends on ARCH_MEDIATEK || COMPILE_TEST
290 help
291 Generic PWM framework driver for Mediatek ARM SoC.
292
293 To compile this driver as a module, choose M here: the module
294 will be called pwm-mediatek.
295
296config PWM_MXS
297 tristate "Freescale MXS PWM support"
298 depends on ARCH_MXS && OF
299 select STMP_DEVICE
300 help
301 Generic PWM framework driver for Freescale MXS.
302
303 To compile this driver as a module, choose M here: the module
304 will be called pwm-mxs.
305
306config PWM_OMAP_DMTIMER
307 tristate "OMAP Dual-Mode Timer PWM support"
308 depends on OF && ARCH_OMAP && OMAP_DM_TIMER
309 help
310 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output
311
312 To compile this driver as a module, choose M here: the module
313 will be called pwm-omap-dmtimer
314
315config PWM_PCA9685
316 tristate "NXP PCA9685 PWM driver"
317 depends on I2C
318 select REGMAP_I2C
319 help
320 Generic PWM framework driver for NXP PCA9685 LED controller.
321
322 To compile this driver as a module, choose M here: the module
323 will be called pwm-pca9685.
324
325config PWM_PUV3
326 tristate "PKUnity NetBook-0916 PWM support"
327 depends on ARCH_PUV3
328 help
329 Generic PWM framework driver for PKUnity NetBook-0916.
330
331 To compile this driver as a module, choose M here: the module
332 will be called pwm-puv3.
333
334config PWM_PXA
335 tristate "PXA PWM support"
336 depends on ARCH_PXA
337 help
338 Generic PWM framework driver for PXA.
339
340 To compile this driver as a module, choose M here: the module
341 will be called pwm-pxa.
342
343config PWM_RCAR
344 tristate "Renesas R-Car PWM support"
345 depends on ARCH_RENESAS || COMPILE_TEST
346 depends on HAS_IOMEM
347 help
348 This driver exposes the PWM Timer controller found in Renesas
349 R-Car chips through the PWM API.
350
351 To compile this driver as a module, choose M here: the module
352 will be called pwm-rcar.
353
354config PWM_RENESAS_TPU
355 tristate "Renesas TPU PWM support"
356 depends on ARCH_RENESAS || COMPILE_TEST
357 depends on HAS_IOMEM
358 help
359 This driver exposes the Timer Pulse Unit (TPU) PWM controller found
360 in Renesas chips through the PWM API.
361
362 To compile this driver as a module, choose M here: the module
363 will be called pwm-renesas-tpu.
364
365config PWM_ROCKCHIP
366 tristate "Rockchip PWM support"
367 depends on ARCH_ROCKCHIP
368 help
369 Generic PWM framework driver for the PWM controller found on
370 Rockchip SoCs.
371
372config PWM_SAMSUNG
373 tristate "Samsung PWM support"
374 depends on PLAT_SAMSUNG || ARCH_EXYNOS
375 help
376 Generic PWM framework driver for Samsung.
377
378 To compile this driver as a module, choose M here: the module
379 will be called pwm-samsung.
380
381config PWM_SPEAR
382 tristate "STMicroelectronics SPEAr PWM support"
383 depends on PLAT_SPEAR
384 depends on OF
385 help
386 Generic PWM framework driver for the PWM controller on ST
387 SPEAr SoCs.
388
389 To compile this driver as a module, choose M here: the module
390 will be called pwm-spear.
391
392config PWM_STI
393 tristate "STiH4xx PWM support"
394 depends on ARCH_STI
395 depends on OF
396 help
397 Generic PWM framework driver for STiH4xx SoCs.
398
399 To compile this driver as a module, choose M here: the module
400 will be called pwm-sti.
401
402config PWM_STM32
403 tristate "STMicroelectronics STM32 PWM"
404 depends on MFD_STM32_TIMERS || COMPILE_TEST
405 help
406 Generic PWM framework driver for STM32 SoCs.
407
408 To compile this driver as a module, choose M here: the module
409 will be called pwm-stm32.
410
411config PWM_STM32_LP
412 tristate "STMicroelectronics STM32 PWM LP"
413 depends on MFD_STM32_LPTIMER || COMPILE_TEST
414 help
415 Generic PWM framework driver for STMicroelectronics STM32 SoCs
416 with Low-Power Timer (LPTIM).
417
418 To compile this driver as a module, choose M here: the module
419 will be called pwm-stm32-lp.
420
421config PWM_STMPE
422 bool "STMPE expander PWM export"
423 depends on MFD_STMPE
424 help
425 This enables support for the PWMs found in the STMPE I/O
426 expanders.
427
428config PWM_SUN4I
429 tristate "Allwinner PWM support"
430 depends on ARCH_SUNXI || COMPILE_TEST
431 depends on HAS_IOMEM && COMMON_CLK
432 help
433 Generic PWM framework driver for Allwinner SoCs.
434
435 To compile this driver as a module, choose M here: the module
436 will be called pwm-sun4i.
437
438config PWM_TEGRA
439 tristate "NVIDIA Tegra PWM support"
440 depends on ARCH_TEGRA
441 help
442 Generic PWM framework driver for the PWFM controller found on NVIDIA
443 Tegra SoCs.
444
445 To compile this driver as a module, choose M here: the module
446 will be called pwm-tegra.
447
448config PWM_TIECAP
449 tristate "ECAP PWM support"
450 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE
451 help
452 PWM driver support for the ECAP APWM controller found on AM33XX
453 TI SOC
454
455 To compile this driver as a module, choose M here: the module
456 will be called pwm-tiecap.
457
458config PWM_TIEHRPWM
459 tristate "EHRPWM PWM support"
460 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX
461 help
462 PWM driver support for the EHRPWM controller found on AM33XX
463 TI SOC
464
465 To compile this driver as a module, choose M here: the module
466 will be called pwm-tiehrpwm.
467
468config PWM_TIPWMSS
469 bool
470 default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM)
471 help
472 PWM Subsystem driver support for AM33xx SOC.
473
474 PWM submodules require PWM config space access from submodule
475 drivers and require common parent driver support.
476
477config PWM_TWL
478 tristate "TWL4030/6030 PWM support"
479 depends on TWL4030_CORE
480 help
481 Generic PWM framework driver for TWL4030/6030.
482
483 To compile this driver as a module, choose M here: the module
484 will be called pwm-twl.
485
486config PWM_TWL_LED
487 tristate "TWL4030/6030 PWM support for LED drivers"
488 depends on TWL4030_CORE
489 help
490 Generic PWM framework driver for TWL4030/6030 LED terminals.
491
492 To compile this driver as a module, choose M here: the module
493 will be called pwm-twl-led.
494
495config PWM_VT8500
496 tristate "vt8500 PWM support"
497 depends on ARCH_VT8500
498 help
499 Generic PWM framework driver for vt8500.
500
501 To compile this driver as a module, choose M here: the module
502 will be called pwm-vt8500.
503
504config PWM_ZX
505 tristate "ZTE ZX PWM support"
506 depends on ARCH_ZX
507 help
508 Generic PWM framework driver for ZTE ZX family SoCs.
509
510 To compile this driver as a module, choose M here: the module
511 will be called pwm-zx.
512
513endif