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_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 45config PWM_ATMEL 46 tristate "Atmel PWM support" 47 depends on ARCH_AT91 && OF 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 54config 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 66config 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 78config 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 90config 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 101config PWM_BCM2835 102 tristate "BCM2835 PWM support" 103 depends on ARCH_BCM2835 || ARCH_BRCMSTB 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 110config 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 119config 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 129config 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 139config 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 146config PWM_CROS_EC 147 tristate "ChromeOS EC PWM driver" 148 depends on CROS_EC 149 help 150 PWM driver for exposing a PWM attached to the ChromeOS Embedded 151 Controller. 152 153config 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 162config 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 174config 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 183config 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 196config 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 205config 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 214config 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 225config 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 235config 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 245config 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 257config 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 267config PWM_LPSS 268 tristate 269 270config 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 280config 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 290config 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 299config 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 310config 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 319config 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 329config PWM_OMAP_DMTIMER 330 tristate "OMAP Dual-Mode Timer PWM support" 331 depends on OF 332 depends on OMAP_DM_TIMER || COMPILE_TEST 333 help 334 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 335 336 To compile this driver as a module, choose M here: the module 337 will be called pwm-omap-dmtimer 338 339config PWM_PCA9685 340 tristate "NXP PCA9685 PWM driver" 341 depends on I2C 342 select REGMAP_I2C 343 help 344 Generic PWM framework driver for NXP PCA9685 LED controller. 345 346 To compile this driver as a module, choose M here: the module 347 will be called pwm-pca9685. 348 349config PWM_PUV3 350 tristate "PKUnity NetBook-0916 PWM support" 351 depends on ARCH_PUV3 352 help 353 Generic PWM framework driver for PKUnity NetBook-0916. 354 355 To compile this driver as a module, choose M here: the module 356 will be called pwm-puv3. 357 358config PWM_PXA 359 tristate "PXA PWM support" 360 depends on ARCH_PXA 361 help 362 Generic PWM framework driver for PXA. 363 364 To compile this driver as a module, choose M here: the module 365 will be called pwm-pxa. 366 367config PWM_RCAR 368 tristate "Renesas R-Car PWM support" 369 depends on ARCH_RENESAS || COMPILE_TEST 370 depends on HAS_IOMEM 371 help 372 This driver exposes the PWM Timer controller found in Renesas 373 R-Car chips through the PWM API. 374 375 To compile this driver as a module, choose M here: the module 376 will be called pwm-rcar. 377 378config PWM_RENESAS_TPU 379 tristate "Renesas TPU PWM support" 380 depends on ARCH_RENESAS || COMPILE_TEST 381 depends on HAS_IOMEM 382 help 383 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 384 in Renesas chips through the PWM API. 385 386 To compile this driver as a module, choose M here: the module 387 will be called pwm-renesas-tpu. 388 389config PWM_ROCKCHIP 390 tristate "Rockchip PWM support" 391 depends on ARCH_ROCKCHIP 392 help 393 Generic PWM framework driver for the PWM controller found on 394 Rockchip SoCs. 395 396config PWM_SAMSUNG 397 tristate "Samsung PWM support" 398 depends on PLAT_SAMSUNG || ARCH_EXYNOS 399 help 400 Generic PWM framework driver for Samsung. 401 402 To compile this driver as a module, choose M here: the module 403 will be called pwm-samsung. 404 405config PWM_SIFIVE 406 tristate "SiFive PWM support" 407 depends on OF 408 depends on COMMON_CLK 409 depends on RISCV || COMPILE_TEST 410 help 411 Generic PWM framework driver for SiFive SoCs. 412 413 To compile this driver as a module, choose M here: the module 414 will be called pwm-sifive. 415 416config PWM_SPEAR 417 tristate "STMicroelectronics SPEAr PWM support" 418 depends on PLAT_SPEAR 419 depends on OF 420 help 421 Generic PWM framework driver for the PWM controller on ST 422 SPEAr SoCs. 423 424 To compile this driver as a module, choose M here: the module 425 will be called pwm-spear. 426 427config PWM_SPRD 428 tristate "Spreadtrum PWM support" 429 depends on ARCH_SPRD || COMPILE_TEST 430 depends on HAS_IOMEM 431 help 432 Generic PWM framework driver for the PWM controller on 433 Spreadtrum SoCs. 434 435 To compile this driver as a module, choose M here: the module 436 will be called pwm-sprd. 437 438config PWM_STI 439 tristate "STiH4xx PWM support" 440 depends on ARCH_STI 441 depends on OF 442 help 443 Generic PWM framework driver for STiH4xx SoCs. 444 445 To compile this driver as a module, choose M here: the module 446 will be called pwm-sti. 447 448config PWM_STM32 449 tristate "STMicroelectronics STM32 PWM" 450 depends on MFD_STM32_TIMERS 451 help 452 Generic PWM framework driver for STM32 SoCs. 453 454 To compile this driver as a module, choose M here: the module 455 will be called pwm-stm32. 456 457config PWM_STM32_LP 458 tristate "STMicroelectronics STM32 PWM LP" 459 depends on MFD_STM32_LPTIMER || COMPILE_TEST 460 help 461 Generic PWM framework driver for STMicroelectronics STM32 SoCs 462 with Low-Power Timer (LPTIM). 463 464 To compile this driver as a module, choose M here: the module 465 will be called pwm-stm32-lp. 466 467config PWM_STMPE 468 bool "STMPE expander PWM export" 469 depends on MFD_STMPE 470 help 471 This enables support for the PWMs found in the STMPE I/O 472 expanders. 473 474config PWM_SUN4I 475 tristate "Allwinner PWM support" 476 depends on ARCH_SUNXI || COMPILE_TEST 477 depends on HAS_IOMEM && COMMON_CLK 478 help 479 Generic PWM framework driver for Allwinner SoCs. 480 481 To compile this driver as a module, choose M here: the module 482 will be called pwm-sun4i. 483 484config PWM_TEGRA 485 tristate "NVIDIA Tegra PWM support" 486 depends on ARCH_TEGRA 487 help 488 Generic PWM framework driver for the PWFM controller found on NVIDIA 489 Tegra SoCs. 490 491 To compile this driver as a module, choose M here: the module 492 will be called pwm-tegra. 493 494config PWM_TIECAP 495 tristate "ECAP PWM support" 496 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 497 help 498 PWM driver support for the ECAP APWM controller found on TI SOCs 499 500 To compile this driver as a module, choose M here: the module 501 will be called pwm-tiecap. 502 503config PWM_TIEHRPWM 504 tristate "EHRPWM PWM support" 505 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3 506 help 507 PWM driver support for the EHRPWM controller found on TI SOCs 508 509 To compile this driver as a module, choose M here: the module 510 will be called pwm-tiehrpwm. 511 512config PWM_TWL 513 tristate "TWL4030/6030 PWM support" 514 depends on TWL4030_CORE 515 help 516 Generic PWM framework driver for TWL4030/6030. 517 518 To compile this driver as a module, choose M here: the module 519 will be called pwm-twl. 520 521config PWM_TWL_LED 522 tristate "TWL4030/6030 PWM support for LED drivers" 523 depends on TWL4030_CORE 524 help 525 Generic PWM framework driver for TWL4030/6030 LED terminals. 526 527 To compile this driver as a module, choose M here: the module 528 will be called pwm-twl-led. 529 530config PWM_VT8500 531 tristate "vt8500 PWM support" 532 depends on ARCH_VT8500 533 help 534 Generic PWM framework driver for vt8500. 535 536 To compile this driver as a module, choose M here: the module 537 will be called pwm-vt8500. 538 539config PWM_ZX 540 tristate "ZTE ZX PWM support" 541 depends on ARCH_ZX 542 help 543 Generic PWM framework driver for ZTE ZX family SoCs. 544 545 To compile this driver as a module, choose M here: the module 546 will be called pwm-zx. 547 548endif 549