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_IQS620A 236 tristate "Azoteq IQS620A PWM support" 237 depends on MFD_IQS62X || COMPILE_TEST 238 help 239 Generic PWM framework driver for the Azoteq IQS620A multi-function 240 sensor. 241 242 To compile this driver as a module, choose M here: the module will 243 be called pwm-iqs620a. 244 245config PWM_JZ4740 246 tristate "Ingenic JZ47xx PWM support" 247 depends on MIPS 248 depends on COMMON_CLK 249 select MFD_SYSCON 250 help 251 Generic PWM framework driver for Ingenic JZ47xx based 252 machines. 253 254 To compile this driver as a module, choose M here: the module 255 will be called pwm-jz4740. 256 257config PWM_LP3943 258 tristate "TI/National Semiconductor LP3943 PWM support" 259 depends on MFD_LP3943 260 help 261 Generic PWM framework driver for LP3943 which supports two PWM 262 channels. 263 264 To compile this driver as a module, choose M here: the module 265 will be called pwm-lp3943. 266 267config PWM_LPC18XX_SCT 268 tristate "LPC18xx/43xx PWM/SCT support" 269 depends on ARCH_LPC18XX || COMPILE_TEST 270 help 271 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 272 supports 16 channels. 273 A maximum of 15 channels can be requested simultaneously and 274 must have the same period. 275 276 To compile this driver as a module, choose M here: the module 277 will be called pwm-lpc18xx-sct. 278 279config PWM_LPC32XX 280 tristate "LPC32XX PWM support" 281 depends on ARCH_LPC32XX || COMPILE_TEST 282 help 283 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 284 PWM controllers. 285 286 To compile this driver as a module, choose M here: the module 287 will be called pwm-lpc32xx. 288 289config PWM_LPSS 290 tristate 291 292config PWM_LPSS_PCI 293 tristate "Intel LPSS PWM PCI driver" 294 depends on X86 && PCI 295 select PWM_LPSS 296 help 297 The PCI 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-pci. 301 302config PWM_LPSS_PLATFORM 303 tristate "Intel LPSS PWM platform driver" 304 depends on X86 && ACPI 305 select PWM_LPSS 306 help 307 The platform driver for Intel Low Power Subsystem PWM controller. 308 309 To compile this driver as a module, choose M here: the module 310 will be called pwm-lpss-platform. 311 312config PWM_MESON 313 tristate "Amlogic Meson PWM driver" 314 depends on ARCH_MESON || COMPILE_TEST 315 depends on COMMON_CLK 316 help 317 The platform driver for Amlogic Meson PWM controller. 318 319 To compile this driver as a module, choose M here: the module 320 will be called pwm-meson. 321 322config PWM_MTK_DISP 323 tristate "MediaTek display PWM driver" 324 depends on ARCH_MEDIATEK || COMPILE_TEST 325 depends on HAS_IOMEM 326 help 327 Generic PWM framework driver for MediaTek disp-pwm device. 328 The PWM is used to control the backlight brightness for display. 329 330 To compile this driver as a module, choose M here: the module 331 will be called pwm-mtk-disp. 332 333config PWM_MEDIATEK 334 tristate "MediaTek PWM support" 335 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST 336 help 337 Generic PWM framework driver for Mediatek ARM SoC. 338 339 To compile this driver as a module, choose M here: the module 340 will be called pwm-mediatek. 341 342config PWM_MXS 343 tristate "Freescale MXS PWM support" 344 depends on OF 345 depends on ARCH_MXS || COMPILE_TEST 346 select STMP_DEVICE 347 help 348 Generic PWM framework driver for Freescale MXS. 349 350 To compile this driver as a module, choose M here: the module 351 will be called pwm-mxs. 352 353config PWM_OMAP_DMTIMER 354 tristate "OMAP Dual-Mode Timer PWM support" 355 depends on OF 356 depends on OMAP_DM_TIMER || COMPILE_TEST 357 help 358 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 359 360 To compile this driver as a module, choose M here: the module 361 will be called pwm-omap-dmtimer 362 363config PWM_PCA9685 364 tristate "NXP PCA9685 PWM driver" 365 depends on I2C 366 select REGMAP_I2C 367 help 368 Generic PWM framework driver for NXP PCA9685 LED controller. 369 370 To compile this driver as a module, choose M here: the module 371 will be called pwm-pca9685. 372 373config PWM_PXA 374 tristate "PXA PWM support" 375 depends on ARCH_PXA || COMPILE_TEST 376 help 377 Generic PWM framework driver for PXA. 378 379 To compile this driver as a module, choose M here: the module 380 will be called pwm-pxa. 381 382config PWM_RCAR 383 tristate "Renesas R-Car PWM support" 384 depends on ARCH_RENESAS || COMPILE_TEST 385 depends on HAS_IOMEM 386 help 387 This driver exposes the PWM Timer controller found in Renesas 388 R-Car chips through the PWM API. 389 390 To compile this driver as a module, choose M here: the module 391 will be called pwm-rcar. 392 393config PWM_RENESAS_TPU 394 tristate "Renesas TPU PWM support" 395 depends on ARCH_RENESAS || COMPILE_TEST 396 depends on HAS_IOMEM 397 help 398 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 399 in Renesas chips through the PWM API. 400 401 To compile this driver as a module, choose M here: the module 402 will be called pwm-renesas-tpu. 403 404config PWM_ROCKCHIP 405 tristate "Rockchip PWM support" 406 depends on ARCH_ROCKCHIP || COMPILE_TEST 407 help 408 Generic PWM framework driver for the PWM controller found on 409 Rockchip SoCs. 410 411config PWM_SAMSUNG 412 tristate "Samsung PWM support" 413 depends on PLAT_SAMSUNG || ARCH_EXYNOS || COMPILE_TEST 414 help 415 Generic PWM framework driver for Samsung. 416 417 To compile this driver as a module, choose M here: the module 418 will be called pwm-samsung. 419 420config PWM_SIFIVE 421 tristate "SiFive PWM support" 422 depends on OF 423 depends on COMMON_CLK 424 depends on RISCV || COMPILE_TEST 425 help 426 Generic PWM framework driver for SiFive SoCs. 427 428 To compile this driver as a module, choose M here: the module 429 will be called pwm-sifive. 430 431config PWM_SPEAR 432 tristate "STMicroelectronics SPEAr PWM support" 433 depends on PLAT_SPEAR || COMPILE_TEST 434 depends on OF 435 help 436 Generic PWM framework driver for the PWM controller on ST 437 SPEAr SoCs. 438 439 To compile this driver as a module, choose M here: the module 440 will be called pwm-spear. 441 442config PWM_SPRD 443 tristate "Spreadtrum PWM support" 444 depends on ARCH_SPRD || COMPILE_TEST 445 depends on HAS_IOMEM 446 help 447 Generic PWM framework driver for the PWM controller on 448 Spreadtrum SoCs. 449 450 To compile this driver as a module, choose M here: the module 451 will be called pwm-sprd. 452 453config PWM_STI 454 tristate "STiH4xx PWM support" 455 depends on ARCH_STI || COMPILE_TEST 456 depends on OF 457 help 458 Generic PWM framework driver for STiH4xx SoCs. 459 460 To compile this driver as a module, choose M here: the module 461 will be called pwm-sti. 462 463config PWM_STM32 464 tristate "STMicroelectronics STM32 PWM" 465 depends on MFD_STM32_TIMERS || COMPILE_TEST 466 help 467 Generic PWM framework driver for STM32 SoCs. 468 469 To compile this driver as a module, choose M here: the module 470 will be called pwm-stm32. 471 472config PWM_STM32_LP 473 tristate "STMicroelectronics STM32 PWM LP" 474 depends on MFD_STM32_LPTIMER || COMPILE_TEST 475 help 476 Generic PWM framework driver for STMicroelectronics STM32 SoCs 477 with Low-Power Timer (LPTIM). 478 479 To compile this driver as a module, choose M here: the module 480 will be called pwm-stm32-lp. 481 482config PWM_STMPE 483 bool "STMPE expander PWM export" 484 depends on MFD_STMPE 485 help 486 This enables support for the PWMs found in the STMPE I/O 487 expanders. 488 489config PWM_SUN4I 490 tristate "Allwinner PWM support" 491 depends on ARCH_SUNXI || COMPILE_TEST 492 depends on HAS_IOMEM && COMMON_CLK 493 help 494 Generic PWM framework driver for Allwinner SoCs. 495 496 To compile this driver as a module, choose M here: the module 497 will be called pwm-sun4i. 498 499config PWM_TEGRA 500 tristate "NVIDIA Tegra PWM support" 501 depends on ARCH_TEGRA || COMPILE_TEST 502 help 503 Generic PWM framework driver for the PWFM controller found on NVIDIA 504 Tegra SoCs. 505 506 To compile this driver as a module, choose M here: the module 507 will be called pwm-tegra. 508 509config PWM_TIECAP 510 tristate "ECAP PWM support" 511 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST 512 help 513 PWM driver support for the ECAP APWM controller found on TI SOCs 514 515 To compile this driver as a module, choose M here: the module 516 will be called pwm-tiecap. 517 518config PWM_TIEHRPWM 519 tristate "EHRPWM PWM support" 520 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3 || COMPILE_TEST 521 help 522 PWM driver support for the EHRPWM controller found on TI SOCs 523 524 To compile this driver as a module, choose M here: the module 525 will be called pwm-tiehrpwm. 526 527config PWM_TWL 528 tristate "TWL4030/6030 PWM support" 529 depends on TWL4030_CORE 530 help 531 Generic PWM framework driver for TWL4030/6030. 532 533 To compile this driver as a module, choose M here: the module 534 will be called pwm-twl. 535 536config PWM_TWL_LED 537 tristate "TWL4030/6030 PWM support for LED drivers" 538 depends on TWL4030_CORE 539 help 540 Generic PWM framework driver for TWL4030/6030 LED terminals. 541 542 To compile this driver as a module, choose M here: the module 543 will be called pwm-twl-led. 544 545config PWM_VT8500 546 tristate "vt8500 PWM support" 547 depends on ARCH_VT8500 || COMPILE_TEST 548 help 549 Generic PWM framework driver for vt8500. 550 551 To compile this driver as a module, choose M here: the module 552 will be called pwm-vt8500. 553 554config PWM_ZX 555 tristate "ZTE ZX PWM support" 556 depends on ARCH_ZX || COMPILE_TEST 557 help 558 Generic PWM framework driver for ZTE ZX family SoCs. 559 560 To compile this driver as a module, choose M here: the module 561 will be called pwm-zx. 562 563endif 564