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 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 && 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 338config 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 348config 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 357config 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 366config 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 377config 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 388config 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 395config 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 404config PWM_SIFIVE 405 tristate "SiFive PWM support" 406 depends on OF 407 depends on COMMON_CLK 408 depends on RISCV || COMPILE_TEST 409 help 410 Generic PWM framework driver for SiFive SoCs. 411 412 To compile this driver as a module, choose M here: the module 413 will be called pwm-sifive. 414 415config PWM_SPEAR 416 tristate "STMicroelectronics SPEAr PWM support" 417 depends on PLAT_SPEAR 418 depends on OF 419 help 420 Generic PWM framework driver for the PWM controller on ST 421 SPEAr SoCs. 422 423 To compile this driver as a module, choose M here: the module 424 will be called pwm-spear. 425 426config PWM_SPRD 427 tristate "Spreadtrum PWM support" 428 depends on ARCH_SPRD || COMPILE_TEST 429 depends on HAS_IOMEM 430 help 431 Generic PWM framework driver for the PWM controller on 432 Spreadtrum SoCs. 433 434 To compile this driver as a module, choose M here: the module 435 will be called pwm-sprd. 436 437config PWM_STI 438 tristate "STiH4xx PWM support" 439 depends on ARCH_STI 440 depends on OF 441 help 442 Generic PWM framework driver for STiH4xx SoCs. 443 444 To compile this driver as a module, choose M here: the module 445 will be called pwm-sti. 446 447config PWM_STM32 448 tristate "STMicroelectronics STM32 PWM" 449 depends on MFD_STM32_TIMERS 450 help 451 Generic PWM framework driver for STM32 SoCs. 452 453 To compile this driver as a module, choose M here: the module 454 will be called pwm-stm32. 455 456config PWM_STM32_LP 457 tristate "STMicroelectronics STM32 PWM LP" 458 depends on MFD_STM32_LPTIMER || COMPILE_TEST 459 help 460 Generic PWM framework driver for STMicroelectronics STM32 SoCs 461 with Low-Power Timer (LPTIM). 462 463 To compile this driver as a module, choose M here: the module 464 will be called pwm-stm32-lp. 465 466config PWM_STMPE 467 bool "STMPE expander PWM export" 468 depends on MFD_STMPE 469 help 470 This enables support for the PWMs found in the STMPE I/O 471 expanders. 472 473config PWM_SUN4I 474 tristate "Allwinner PWM support" 475 depends on ARCH_SUNXI || COMPILE_TEST 476 depends on HAS_IOMEM && COMMON_CLK 477 help 478 Generic PWM framework driver for Allwinner SoCs. 479 480 To compile this driver as a module, choose M here: the module 481 will be called pwm-sun4i. 482 483config PWM_TEGRA 484 tristate "NVIDIA Tegra PWM support" 485 depends on ARCH_TEGRA 486 help 487 Generic PWM framework driver for the PWFM controller found on NVIDIA 488 Tegra SoCs. 489 490 To compile this driver as a module, choose M here: the module 491 will be called pwm-tegra. 492 493config PWM_TIECAP 494 tristate "ECAP PWM support" 495 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 496 help 497 PWM driver support for the ECAP APWM controller found on TI SOCs 498 499 To compile this driver as a module, choose M here: the module 500 will be called pwm-tiecap. 501 502config PWM_TIEHRPWM 503 tristate "EHRPWM PWM support" 504 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3 505 help 506 PWM driver support for the EHRPWM controller found on TI SOCs 507 508 To compile this driver as a module, choose M here: the module 509 will be called pwm-tiehrpwm. 510 511config PWM_TWL 512 tristate "TWL4030/6030 PWM support" 513 depends on TWL4030_CORE 514 help 515 Generic PWM framework driver for TWL4030/6030. 516 517 To compile this driver as a module, choose M here: the module 518 will be called pwm-twl. 519 520config PWM_TWL_LED 521 tristate "TWL4030/6030 PWM support for LED drivers" 522 depends on TWL4030_CORE 523 help 524 Generic PWM framework driver for TWL4030/6030 LED terminals. 525 526 To compile this driver as a module, choose M here: the module 527 will be called pwm-twl-led. 528 529config PWM_VT8500 530 tristate "vt8500 PWM support" 531 depends on ARCH_VT8500 532 help 533 Generic PWM framework driver for vt8500. 534 535 To compile this driver as a module, choose M here: the module 536 will be called pwm-vt8500. 537 538config PWM_ZX 539 tristate "ZTE ZX PWM support" 540 depends on ARCH_ZX 541 help 542 Generic PWM framework driver for ZTE ZX family SoCs. 543 544 To compile this driver as a module, choose M here: the module 545 will be called pwm-zx. 546 547endif 548