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 ARCH_AT91 || COMPILE_TEST 57 depends on HAS_IOMEM && OF 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 OF 79 select REGMAP_MMIO 80 help 81 Generic PWM framework driver for Atmel Timer Counter Block. 82 83 A Timer Counter Block provides 6 PWM devices grouped by 2. 84 Devices in a given group must have the same period. 85 86 To compile this driver as a module, choose M here: the module 87 will be called pwm-atmel-tcb. 88 89config PWM_BCM_IPROC 90 tristate "iProc PWM support" 91 depends on ARCH_BCM_IPROC || COMPILE_TEST 92 depends on COMMON_CLK && HAS_IOMEM 93 default ARCH_BCM_IPROC 94 help 95 Generic PWM framework driver for Broadcom iProc PWM block. This 96 block is used in Broadcom iProc SoC's. 97 98 To compile this driver as a module, choose M here: the module 99 will be called pwm-bcm-iproc. 100 101config PWM_BCM_KONA 102 tristate "Kona PWM support" 103 depends on ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS || COMPILE_TEST 104 depends on HAVE_CLK && HAS_IOMEM 105 default ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS 106 help 107 Generic PWM framework driver for Broadcom Kona PWM block. 108 109 To compile this driver as a module, choose M here: the module 110 will be called pwm-bcm-kona. 111 112config PWM_BCM2835 113 tristate "BCM2835 PWM support" 114 depends on ARCH_BCM2835 || ARCH_BRCMSTB || COMPILE_TEST 115 depends on HAS_IOMEM 116 help 117 PWM framework driver for BCM2835 controller (Raspberry Pi) 118 119 To compile this driver as a module, choose M here: the module 120 will be called pwm-bcm2835. 121 122config PWM_BERLIN 123 tristate "Marvell Berlin PWM support" 124 depends on ARCH_BERLIN || COMPILE_TEST 125 depends on HAS_IOMEM 126 help 127 PWM framework driver for Marvell Berlin SoCs. 128 129 To compile this driver as a module, choose M here: the module 130 will be called pwm-berlin. 131 132config PWM_BRCMSTB 133 tristate "Broadcom STB PWM support" 134 depends on ARCH_BRCMSTB || BMIPS_GENERIC || COMPILE_TEST 135 depends on HAS_IOMEM 136 help 137 Generic PWM framework driver for the Broadcom Set-top-Box 138 SoCs (BCM7xxx). 139 140 To compile this driver as a module, choose M Here: the module 141 will be called pwm-brcmstb.c. 142 143config PWM_CLPS711X 144 tristate "CLPS711X PWM support" 145 depends on ARCH_CLPS711X || COMPILE_TEST 146 depends on HAS_IOMEM 147 help 148 Generic PWM framework driver for Cirrus Logic CLPS711X. 149 150 To compile this driver as a module, choose M here: the module 151 will be called pwm-clps711x. 152 153config PWM_CRC 154 bool "Intel Crystalcove (CRC) PWM support" 155 depends on X86 && INTEL_SOC_PMIC 156 help 157 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM 158 control. 159 160config PWM_CROS_EC 161 tristate "ChromeOS EC PWM driver" 162 depends on CROS_EC 163 help 164 PWM driver for exposing a PWM attached to the ChromeOS Embedded 165 Controller. 166 167config PWM_DWC 168 tristate "DesignWare PWM Controller" 169 depends on PCI 170 help 171 PWM driver for Synopsys DWC PWM Controller attached to a PCI bus. 172 173 To compile this driver as a module, choose M here: the module 174 will be called pwm-dwc. 175 176config PWM_EP93XX 177 tristate "Cirrus Logic EP93xx PWM support" 178 depends on ARCH_EP93XX || COMPILE_TEST 179 depends on HAS_IOMEM 180 help 181 Generic PWM framework driver for Cirrus Logic EP93xx. 182 183 To compile this driver as a module, choose M here: the module 184 will be called pwm-ep93xx. 185 186config PWM_FSL_FTM 187 tristate "Freescale FlexTimer Module (FTM) PWM support" 188 depends on HAS_IOMEM 189 depends on OF 190 select REGMAP_MMIO 191 help 192 Generic FTM PWM framework driver for Freescale VF610 and 193 Layerscape LS-1 SoCs. 194 195 To compile this driver as a module, choose M here: the module 196 will be called pwm-fsl-ftm. 197 198config PWM_HIBVT 199 tristate "HiSilicon BVT PWM support" 200 depends on ARCH_HISI || COMPILE_TEST 201 depends on HAS_IOMEM 202 help 203 Generic PWM framework driver for HiSilicon BVT SoCs. 204 205 To compile this driver as a module, choose M here: the module 206 will be called pwm-hibvt. 207 208config PWM_IMG 209 tristate "Imagination Technologies PWM driver" 210 depends on HAS_IOMEM 211 depends on MFD_SYSCON 212 depends on COMMON_CLK 213 depends on MIPS || COMPILE_TEST 214 help 215 Generic PWM framework driver for Imagination Technologies 216 PWM block which supports 4 channels. 217 218 To compile this driver as a module, choose M here: the module 219 will be called pwm-img 220 221config PWM_IMX1 222 tristate "i.MX1 PWM support" 223 depends on ARCH_MXC || COMPILE_TEST 224 depends on HAS_IOMEM 225 help 226 Generic PWM framework driver for i.MX1 and i.MX21 227 228 To compile this driver as a module, choose M here: the module 229 will be called pwm-imx1. 230 231config PWM_IMX27 232 tristate "i.MX27 PWM support" 233 depends on ARCH_MXC || COMPILE_TEST 234 depends on HAS_IOMEM 235 help 236 Generic PWM framework driver for i.MX27 and later i.MX SoCs. 237 238 To compile this driver as a module, choose M here: the module 239 will be called pwm-imx27. 240 241config PWM_IMX_TPM 242 tristate "i.MX TPM PWM support" 243 depends on ARCH_MXC || COMPILE_TEST 244 depends on HAVE_CLK && HAS_IOMEM 245 help 246 Generic PWM framework driver for i.MX7ULP TPM module, TPM's full 247 name is Low Power Timer/Pulse Width Modulation Module. 248 249 To compile this driver as a module, choose M here: the module 250 will be called pwm-imx-tpm. 251 252config PWM_INTEL_LGM 253 tristate "Intel LGM PWM support" 254 depends on HAS_IOMEM 255 depends on (OF && X86) || COMPILE_TEST 256 select REGMAP_MMIO 257 help 258 Generic PWM fan controller driver for LGM SoC. 259 260 To compile this driver as a module, choose M here: the module 261 will be called pwm-intel-lgm. 262 263config PWM_IQS620A 264 tristate "Azoteq IQS620A PWM support" 265 depends on MFD_IQS62X || COMPILE_TEST 266 help 267 Generic PWM framework driver for the Azoteq IQS620A multi-function 268 sensor. 269 270 To compile this driver as a module, choose M here: the module will 271 be called pwm-iqs620a. 272 273config PWM_JZ4740 274 tristate "Ingenic JZ47xx PWM support" 275 depends on MIPS 276 depends on COMMON_CLK 277 select MFD_SYSCON 278 help 279 Generic PWM framework driver for Ingenic JZ47xx based 280 machines. 281 282 To compile this driver as a module, choose M here: the module 283 will be called pwm-jz4740. 284 285config PWM_KEEMBAY 286 tristate "Intel Keem Bay PWM driver" 287 depends on ARCH_KEEMBAY || (ARM64 && COMPILE_TEST) 288 help 289 The platform driver for Intel Keem Bay PWM controller. 290 291 To compile this driver as a module, choose M here: the module 292 will be called pwm-keembay. 293 294config PWM_LP3943 295 tristate "TI/National Semiconductor LP3943 PWM support" 296 depends on MFD_LP3943 297 help 298 Generic PWM framework driver for LP3943 which supports two PWM 299 channels. 300 301 To compile this driver as a module, choose M here: the module 302 will be called pwm-lp3943. 303 304config PWM_LPC18XX_SCT 305 tristate "LPC18xx/43xx PWM/SCT support" 306 depends on ARCH_LPC18XX || COMPILE_TEST 307 depends on HAS_IOMEM 308 help 309 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 310 supports 16 channels. 311 A maximum of 15 channels can be requested simultaneously and 312 must have the same period. 313 314 To compile this driver as a module, choose M here: the module 315 will be called pwm-lpc18xx-sct. 316 317config PWM_LPC32XX 318 tristate "LPC32XX PWM support" 319 depends on ARCH_LPC32XX || COMPILE_TEST 320 depends on HAS_IOMEM 321 help 322 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 323 PWM controllers. 324 325 To compile this driver as a module, choose M here: the module 326 will be called pwm-lpc32xx. 327 328config PWM_LPSS 329 depends on HAS_IOMEM 330 tristate 331 332config PWM_LPSS_PCI 333 tristate "Intel LPSS PWM PCI driver" 334 depends on X86 || COMPILE_TEST 335 depends on HAS_IOMEM && PCI 336 select PWM_LPSS 337 help 338 The PCI driver for Intel Low Power Subsystem PWM controller. 339 340 To compile this driver as a module, choose M here: the module 341 will be called pwm-lpss-pci. 342 343config PWM_LPSS_PLATFORM 344 tristate "Intel LPSS PWM platform driver" 345 depends on (X86 && ACPI) || COMPILE_TEST 346 depends on HAS_IOMEM 347 select PWM_LPSS 348 help 349 The platform driver for Intel Low Power Subsystem PWM controller. 350 351 To compile this driver as a module, choose M here: the module 352 will be called pwm-lpss-platform. 353 354config PWM_MESON 355 tristate "Amlogic Meson PWM driver" 356 depends on ARCH_MESON || COMPILE_TEST 357 depends on COMMON_CLK && HAS_IOMEM 358 help 359 The platform driver for Amlogic Meson PWM controller. 360 361 To compile this driver as a module, choose M here: the module 362 will be called pwm-meson. 363 364config PWM_MTK_DISP 365 tristate "MediaTek display PWM driver" 366 depends on ARCH_MEDIATEK || COMPILE_TEST 367 depends on HAS_IOMEM 368 help 369 Generic PWM framework driver for MediaTek disp-pwm device. 370 The PWM is used to control the backlight brightness for display. 371 372 To compile this driver as a module, choose M here: the module 373 will be called pwm-mtk-disp. 374 375config PWM_MEDIATEK 376 tristate "MediaTek PWM support" 377 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST 378 depends on HAS_IOMEM 379 help 380 Generic PWM framework driver for Mediatek ARM SoC. 381 382 To compile this driver as a module, choose M here: the module 383 will be called pwm-mediatek. 384 385config PWM_MXS 386 tristate "Freescale MXS PWM support" 387 depends on ARCH_MXS || COMPILE_TEST 388 depends on HAS_IOMEM && OF 389 select STMP_DEVICE 390 help 391 Generic PWM framework driver for Freescale MXS. 392 393 To compile this driver as a module, choose M here: the module 394 will be called pwm-mxs. 395 396config PWM_OMAP_DMTIMER 397 tristate "OMAP Dual-Mode Timer PWM support" 398 depends on OF 399 depends on OMAP_DM_TIMER || COMPILE_TEST 400 help 401 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 402 403 To compile this driver as a module, choose M here: the module 404 will be called pwm-omap-dmtimer 405 406config PWM_PCA9685 407 tristate "NXP PCA9685 PWM driver" 408 depends on I2C 409 select REGMAP_I2C 410 help 411 Generic PWM framework driver for NXP PCA9685 LED controller. 412 413 To compile this driver as a module, choose M here: the module 414 will be called pwm-pca9685. 415 416config PWM_PXA 417 tristate "PXA PWM support" 418 depends on ARCH_PXA || COMPILE_TEST 419 depends on HAS_IOMEM 420 help 421 Generic PWM framework driver for PXA. 422 423 To compile this driver as a module, choose M here: the module 424 will be called pwm-pxa. 425 426config PWM_RCAR 427 tristate "Renesas R-Car PWM support" 428 depends on ARCH_RENESAS || COMPILE_TEST 429 depends on HAS_IOMEM 430 help 431 This driver exposes the PWM Timer controller found in Renesas 432 R-Car chips through the PWM API. 433 434 To compile this driver as a module, choose M here: the module 435 will be called pwm-rcar. 436 437config PWM_RENESAS_TPU 438 tristate "Renesas TPU PWM support" 439 depends on ARCH_RENESAS || COMPILE_TEST 440 depends on HAS_IOMEM 441 help 442 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 443 in Renesas chips through the PWM API. 444 445 To compile this driver as a module, choose M here: the module 446 will be called pwm-renesas-tpu. 447 448config PWM_ROCKCHIP 449 tristate "Rockchip PWM support" 450 depends on ARCH_ROCKCHIP || COMPILE_TEST 451 depends on HAS_IOMEM 452 help 453 Generic PWM framework driver for the PWM controller found on 454 Rockchip SoCs. 455 456config PWM_SAMSUNG 457 tristate "Samsung PWM support" 458 depends on PLAT_SAMSUNG || ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST 459 depends on HAS_IOMEM 460 help 461 Generic PWM framework driver for Samsung. 462 463 To compile this driver as a module, choose M here: the module 464 will be called pwm-samsung. 465 466config PWM_SIFIVE 467 tristate "SiFive PWM support" 468 depends on OF 469 depends on COMMON_CLK && HAS_IOMEM 470 depends on RISCV || COMPILE_TEST 471 help 472 Generic PWM framework driver for SiFive SoCs. 473 474 To compile this driver as a module, choose M here: the module 475 will be called pwm-sifive. 476 477config PWM_SL28CPLD 478 tristate "Kontron sl28cpld PWM support" 479 depends on MFD_SL28CPLD || COMPILE_TEST 480 help 481 Generic PWM framework driver for board management controller 482 found on the Kontron sl28 CPLD. 483 484 To compile this driver as a module, choose M here: the module 485 will be called pwm-sl28cpld. 486 487config PWM_SPEAR 488 tristate "STMicroelectronics SPEAr PWM support" 489 depends on PLAT_SPEAR || COMPILE_TEST 490 depends on HAS_IOMEM && OF 491 help 492 Generic PWM framework driver for the PWM controller on ST 493 SPEAr SoCs. 494 495 To compile this driver as a module, choose M here: the module 496 will be called pwm-spear. 497 498config PWM_SPRD 499 tristate "Spreadtrum PWM support" 500 depends on ARCH_SPRD || COMPILE_TEST 501 depends on HAS_IOMEM 502 help 503 Generic PWM framework driver for the PWM controller on 504 Spreadtrum SoCs. 505 506 To compile this driver as a module, choose M here: the module 507 will be called pwm-sprd. 508 509config PWM_STI 510 tristate "STiH4xx PWM support" 511 depends on ARCH_STI || COMPILE_TEST 512 depends on HAS_IOMEM && OF 513 help 514 Generic PWM framework driver for STiH4xx SoCs. 515 516 To compile this driver as a module, choose M here: the module 517 will be called pwm-sti. 518 519config PWM_STM32 520 tristate "STMicroelectronics STM32 PWM" 521 depends on MFD_STM32_TIMERS || COMPILE_TEST 522 help 523 Generic PWM framework driver for STM32 SoCs. 524 525 To compile this driver as a module, choose M here: the module 526 will be called pwm-stm32. 527 528config PWM_STM32_LP 529 tristate "STMicroelectronics STM32 PWM LP" 530 depends on MFD_STM32_LPTIMER || COMPILE_TEST 531 help 532 Generic PWM framework driver for STMicroelectronics STM32 SoCs 533 with Low-Power Timer (LPTIM). 534 535 To compile this driver as a module, choose M here: the module 536 will be called pwm-stm32-lp. 537 538config PWM_STMPE 539 bool "STMPE expander PWM export" 540 depends on MFD_STMPE 541 help 542 This enables support for the PWMs found in the STMPE I/O 543 expanders. 544 545config PWM_SUN4I 546 tristate "Allwinner PWM support" 547 depends on ARCH_SUNXI || COMPILE_TEST 548 depends on HAS_IOMEM && COMMON_CLK 549 help 550 Generic PWM framework driver for Allwinner SoCs. 551 552 To compile this driver as a module, choose M here: the module 553 will be called pwm-sun4i. 554 555config PWM_TEGRA 556 tristate "NVIDIA Tegra PWM support" 557 depends on ARCH_TEGRA || COMPILE_TEST 558 depends on HAS_IOMEM 559 help 560 Generic PWM framework driver for the PWFM controller found on NVIDIA 561 Tegra SoCs. 562 563 To compile this driver as a module, choose M here: the module 564 will be called pwm-tegra. 565 566config PWM_TIECAP 567 tristate "ECAP PWM support" 568 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST 569 depends on HAS_IOMEM 570 help 571 PWM driver support for the ECAP APWM controller found on TI SOCs 572 573 To compile this driver as a module, choose M here: the module 574 will be called pwm-tiecap. 575 576config PWM_TIEHRPWM 577 tristate "EHRPWM PWM support" 578 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3 || COMPILE_TEST 579 depends on HAS_IOMEM 580 help 581 PWM driver support for the EHRPWM controller found on TI SOCs 582 583 To compile this driver as a module, choose M here: the module 584 will be called pwm-tiehrpwm. 585 586config PWM_TWL 587 tristate "TWL4030/6030 PWM support" 588 depends on TWL4030_CORE 589 help 590 Generic PWM framework driver for TWL4030/6030. 591 592 To compile this driver as a module, choose M here: the module 593 will be called pwm-twl. 594 595config PWM_TWL_LED 596 tristate "TWL4030/6030 PWM support for LED drivers" 597 depends on TWL4030_CORE 598 help 599 Generic PWM framework driver for TWL4030/6030 LED terminals. 600 601 To compile this driver as a module, choose M here: the module 602 will be called pwm-twl-led. 603 604config PWM_VT8500 605 tristate "vt8500 PWM support" 606 depends on ARCH_VT8500 || COMPILE_TEST 607 depends on HAS_IOMEM 608 help 609 Generic PWM framework driver for vt8500. 610 611 To compile this driver as a module, choose M here: the module 612 will be called pwm-vt8500. 613 614endif 615