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_JZ4740 236 tristate "Ingenic JZ47xx PWM support" 237 depends on MACH_INGENIC 238 depends on COMMON_CLK 239 select MFD_SYSCON 240 help 241 Generic PWM framework driver for Ingenic JZ47xx based 242 machines. 243 244 To compile this driver as a module, choose M here: the module 245 will be called pwm-jz4740. 246 247config PWM_LP3943 248 tristate "TI/National Semiconductor LP3943 PWM support" 249 depends on MFD_LP3943 250 help 251 Generic PWM framework driver for LP3943 which supports two PWM 252 channels. 253 254 To compile this driver as a module, choose M here: the module 255 will be called pwm-lp3943. 256 257config PWM_LPC18XX_SCT 258 tristate "LPC18xx/43xx PWM/SCT support" 259 depends on ARCH_LPC18XX || COMPILE_TEST 260 help 261 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 262 supports 16 channels. 263 A maximum of 15 channels can be requested simultaneously and 264 must have the same period. 265 266 To compile this driver as a module, choose M here: the module 267 will be called pwm-lpc18xx-sct. 268 269config PWM_LPC32XX 270 tristate "LPC32XX PWM support" 271 depends on ARCH_LPC32XX || COMPILE_TEST 272 help 273 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 274 PWM controllers. 275 276 To compile this driver as a module, choose M here: the module 277 will be called pwm-lpc32xx. 278 279config PWM_LPSS 280 tristate 281 282config PWM_LPSS_PCI 283 tristate "Intel LPSS PWM PCI driver" 284 depends on X86 && PCI 285 select PWM_LPSS 286 help 287 The PCI driver for Intel Low Power Subsystem PWM controller. 288 289 To compile this driver as a module, choose M here: the module 290 will be called pwm-lpss-pci. 291 292config PWM_LPSS_PLATFORM 293 tristate "Intel LPSS PWM platform driver" 294 depends on X86 && ACPI 295 select PWM_LPSS 296 help 297 The platform 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-platform. 301 302config PWM_MESON 303 tristate "Amlogic Meson PWM driver" 304 depends on ARCH_MESON || COMPILE_TEST 305 depends on COMMON_CLK 306 help 307 The platform driver for Amlogic Meson PWM controller. 308 309 To compile this driver as a module, choose M here: the module 310 will be called pwm-meson. 311 312config PWM_MTK_DISP 313 tristate "MediaTek display PWM driver" 314 depends on ARCH_MEDIATEK || COMPILE_TEST 315 depends on HAS_IOMEM 316 help 317 Generic PWM framework driver for MediaTek disp-pwm device. 318 The PWM is used to control the backlight brightness for display. 319 320 To compile this driver as a module, choose M here: the module 321 will be called pwm-mtk-disp. 322 323config PWM_MEDIATEK 324 tristate "MediaTek PWM support" 325 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST 326 help 327 Generic PWM framework driver for Mediatek ARM SoC. 328 329 To compile this driver as a module, choose M here: the module 330 will be called pwm-mediatek. 331 332config PWM_MXS 333 tristate "Freescale MXS PWM support" 334 depends on OF 335 depends on ARCH_MXS || COMPILE_TEST 336 select STMP_DEVICE 337 help 338 Generic PWM framework driver for Freescale MXS. 339 340 To compile this driver as a module, choose M here: the module 341 will be called pwm-mxs. 342 343config PWM_OMAP_DMTIMER 344 tristate "OMAP Dual-Mode Timer PWM support" 345 depends on OF 346 depends on OMAP_DM_TIMER || COMPILE_TEST 347 help 348 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 349 350 To compile this driver as a module, choose M here: the module 351 will be called pwm-omap-dmtimer 352 353config PWM_PCA9685 354 tristate "NXP PCA9685 PWM driver" 355 depends on I2C 356 select REGMAP_I2C 357 help 358 Generic PWM framework driver for NXP PCA9685 LED controller. 359 360 To compile this driver as a module, choose M here: the module 361 will be called pwm-pca9685. 362 363config PWM_PUV3 364 tristate "PKUnity NetBook-0916 PWM support" 365 depends on ARCH_PUV3 366 help 367 Generic PWM framework driver for PKUnity NetBook-0916. 368 369 To compile this driver as a module, choose M here: the module 370 will be called pwm-puv3. 371 372config PWM_PXA 373 tristate "PXA PWM support" 374 depends on ARCH_PXA || COMPILE_TEST 375 help 376 Generic PWM framework driver for PXA. 377 378 To compile this driver as a module, choose M here: the module 379 will be called pwm-pxa. 380 381config PWM_RCAR 382 tristate "Renesas R-Car PWM support" 383 depends on ARCH_RENESAS || COMPILE_TEST 384 depends on HAS_IOMEM 385 help 386 This driver exposes the PWM Timer controller found in Renesas 387 R-Car chips through the PWM API. 388 389 To compile this driver as a module, choose M here: the module 390 will be called pwm-rcar. 391 392config PWM_RENESAS_TPU 393 tristate "Renesas TPU PWM support" 394 depends on ARCH_RENESAS || COMPILE_TEST 395 depends on HAS_IOMEM 396 help 397 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 398 in Renesas chips through the PWM API. 399 400 To compile this driver as a module, choose M here: the module 401 will be called pwm-renesas-tpu. 402 403config PWM_ROCKCHIP 404 tristate "Rockchip PWM support" 405 depends on ARCH_ROCKCHIP || COMPILE_TEST 406 help 407 Generic PWM framework driver for the PWM controller found on 408 Rockchip SoCs. 409 410config PWM_SAMSUNG 411 tristate "Samsung PWM support" 412 depends on PLAT_SAMSUNG || ARCH_EXYNOS || COMPILE_TEST 413 help 414 Generic PWM framework driver for Samsung. 415 416 To compile this driver as a module, choose M here: the module 417 will be called pwm-samsung. 418 419config PWM_SIFIVE 420 tristate "SiFive PWM support" 421 depends on OF 422 depends on COMMON_CLK 423 depends on RISCV || COMPILE_TEST 424 help 425 Generic PWM framework driver for SiFive SoCs. 426 427 To compile this driver as a module, choose M here: the module 428 will be called pwm-sifive. 429 430config PWM_SPEAR 431 tristate "STMicroelectronics SPEAr PWM support" 432 depends on PLAT_SPEAR || COMPILE_TEST 433 depends on OF 434 help 435 Generic PWM framework driver for the PWM controller on ST 436 SPEAr SoCs. 437 438 To compile this driver as a module, choose M here: the module 439 will be called pwm-spear. 440 441config PWM_SPRD 442 tristate "Spreadtrum PWM support" 443 depends on ARCH_SPRD || COMPILE_TEST 444 depends on HAS_IOMEM 445 help 446 Generic PWM framework driver for the PWM controller on 447 Spreadtrum SoCs. 448 449 To compile this driver as a module, choose M here: the module 450 will be called pwm-sprd. 451 452config PWM_STI 453 tristate "STiH4xx PWM support" 454 depends on ARCH_STI || COMPILE_TEST 455 depends on OF 456 help 457 Generic PWM framework driver for STiH4xx SoCs. 458 459 To compile this driver as a module, choose M here: the module 460 will be called pwm-sti. 461 462config PWM_STM32 463 tristate "STMicroelectronics STM32 PWM" 464 depends on MFD_STM32_TIMERS || COMPILE_TEST 465 help 466 Generic PWM framework driver for STM32 SoCs. 467 468 To compile this driver as a module, choose M here: the module 469 will be called pwm-stm32. 470 471config PWM_STM32_LP 472 tristate "STMicroelectronics STM32 PWM LP" 473 depends on MFD_STM32_LPTIMER || COMPILE_TEST 474 help 475 Generic PWM framework driver for STMicroelectronics STM32 SoCs 476 with Low-Power Timer (LPTIM). 477 478 To compile this driver as a module, choose M here: the module 479 will be called pwm-stm32-lp. 480 481config PWM_STMPE 482 bool "STMPE expander PWM export" 483 depends on MFD_STMPE 484 help 485 This enables support for the PWMs found in the STMPE I/O 486 expanders. 487 488config PWM_SUN4I 489 tristate "Allwinner PWM support" 490 depends on ARCH_SUNXI || COMPILE_TEST 491 depends on HAS_IOMEM && COMMON_CLK 492 help 493 Generic PWM framework driver for Allwinner SoCs. 494 495 To compile this driver as a module, choose M here: the module 496 will be called pwm-sun4i. 497 498config PWM_TEGRA 499 tristate "NVIDIA Tegra PWM support" 500 depends on ARCH_TEGRA || COMPILE_TEST 501 help 502 Generic PWM framework driver for the PWFM controller found on NVIDIA 503 Tegra SoCs. 504 505 To compile this driver as a module, choose M here: the module 506 will be called pwm-tegra. 507 508config PWM_TIECAP 509 tristate "ECAP PWM support" 510 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST 511 help 512 PWM driver support for the ECAP APWM controller found on TI SOCs 513 514 To compile this driver as a module, choose M here: the module 515 will be called pwm-tiecap. 516 517config PWM_TIEHRPWM 518 tristate "EHRPWM PWM support" 519 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3 || COMPILE_TEST 520 help 521 PWM driver support for the EHRPWM controller found on TI SOCs 522 523 To compile this driver as a module, choose M here: the module 524 will be called pwm-tiehrpwm. 525 526config PWM_TWL 527 tristate "TWL4030/6030 PWM support" 528 depends on TWL4030_CORE 529 help 530 Generic PWM framework driver for TWL4030/6030. 531 532 To compile this driver as a module, choose M here: the module 533 will be called pwm-twl. 534 535config PWM_TWL_LED 536 tristate "TWL4030/6030 PWM support for LED drivers" 537 depends on TWL4030_CORE 538 help 539 Generic PWM framework driver for TWL4030/6030 LED terminals. 540 541 To compile this driver as a module, choose M here: the module 542 will be called pwm-twl-led. 543 544config PWM_VT8500 545 tristate "vt8500 PWM support" 546 depends on ARCH_VT8500 || COMPILE_TEST 547 help 548 Generic PWM framework driver for vt8500. 549 550 To compile this driver as a module, choose M here: the module 551 will be called pwm-vt8500. 552 553config PWM_ZX 554 tristate "ZTE ZX PWM support" 555 depends on ARCH_ZX || COMPILE_TEST 556 help 557 Generic PWM framework driver for ZTE ZX family SoCs. 558 559 To compile this driver as a module, choose M here: the module 560 will be called pwm-zx. 561 562endif 563