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_CLK 144 tristate "Clock based PWM support" 145 depends on HAVE_CLK || COMPILE_TEST 146 help 147 Generic PWM framework driver for outputs that can be 148 muxed to clocks. 149 150 To compile this driver as a module, choose M here: the module 151 will be called pwm-clk. 152 153config PWM_CLPS711X 154 tristate "CLPS711X PWM support" 155 depends on ARCH_CLPS711X || COMPILE_TEST 156 depends on HAS_IOMEM 157 help 158 Generic PWM framework driver for Cirrus Logic CLPS711X. 159 160 To compile this driver as a module, choose M here: the module 161 will be called pwm-clps711x. 162 163config PWM_CRC 164 bool "Intel Crystalcove (CRC) PWM support" 165 depends on X86 && INTEL_SOC_PMIC 166 help 167 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM 168 control. 169 170config PWM_CROS_EC 171 tristate "ChromeOS EC PWM driver" 172 depends on CROS_EC 173 help 174 PWM driver for exposing a PWM attached to the ChromeOS Embedded 175 Controller. 176 177config PWM_DWC 178 tristate "DesignWare PWM Controller" 179 depends on PCI 180 help 181 PWM driver for Synopsys DWC PWM Controller attached to a PCI bus. 182 183 To compile this driver as a module, choose M here: the module 184 will be called pwm-dwc. 185 186config PWM_EP93XX 187 tristate "Cirrus Logic EP93xx PWM support" 188 depends on ARCH_EP93XX || COMPILE_TEST 189 depends on HAS_IOMEM 190 help 191 Generic PWM framework driver for Cirrus Logic EP93xx. 192 193 To compile this driver as a module, choose M here: the module 194 will be called pwm-ep93xx. 195 196config PWM_FSL_FTM 197 tristate "Freescale FlexTimer Module (FTM) PWM support" 198 depends on HAS_IOMEM 199 depends on OF 200 select REGMAP_MMIO 201 help 202 Generic FTM PWM framework driver for Freescale VF610 and 203 Layerscape LS-1 SoCs. 204 205 To compile this driver as a module, choose M here: the module 206 will be called pwm-fsl-ftm. 207 208config PWM_HIBVT 209 tristate "HiSilicon BVT PWM support" 210 depends on ARCH_HISI || COMPILE_TEST 211 depends on HAS_IOMEM 212 help 213 Generic PWM framework driver for HiSilicon BVT SoCs. 214 215 To compile this driver as a module, choose M here: the module 216 will be called pwm-hibvt. 217 218config PWM_IMG 219 tristate "Imagination Technologies PWM driver" 220 depends on HAS_IOMEM 221 depends on MFD_SYSCON 222 depends on COMMON_CLK 223 depends on MIPS || COMPILE_TEST 224 help 225 Generic PWM framework driver for Imagination Technologies 226 PWM block which supports 4 channels. 227 228 To compile this driver as a module, choose M here: the module 229 will be called pwm-img 230 231config PWM_IMX1 232 tristate "i.MX1 PWM support" 233 depends on ARCH_MXC || COMPILE_TEST 234 depends on HAS_IOMEM 235 help 236 Generic PWM framework driver for i.MX1 and i.MX21 237 238 To compile this driver as a module, choose M here: the module 239 will be called pwm-imx1. 240 241config PWM_IMX27 242 tristate "i.MX27 PWM support" 243 depends on ARCH_MXC || COMPILE_TEST 244 depends on HAS_IOMEM 245 help 246 Generic PWM framework driver for i.MX27 and later i.MX SoCs. 247 248 To compile this driver as a module, choose M here: the module 249 will be called pwm-imx27. 250 251config PWM_IMX_TPM 252 tristate "i.MX TPM PWM support" 253 depends on ARCH_MXC || COMPILE_TEST 254 depends on HAVE_CLK && HAS_IOMEM 255 help 256 Generic PWM framework driver for i.MX7ULP TPM module, TPM's full 257 name is Low Power Timer/Pulse Width Modulation Module. 258 259 To compile this driver as a module, choose M here: the module 260 will be called pwm-imx-tpm. 261 262config PWM_INTEL_LGM 263 tristate "Intel LGM PWM support" 264 depends on HAS_IOMEM 265 depends on (OF && X86) || COMPILE_TEST 266 select REGMAP_MMIO 267 help 268 Generic PWM fan controller driver for LGM SoC. 269 270 To compile this driver as a module, choose M here: the module 271 will be called pwm-intel-lgm. 272 273config PWM_IQS620A 274 tristate "Azoteq IQS620A PWM support" 275 depends on MFD_IQS62X || COMPILE_TEST 276 help 277 Generic PWM framework driver for the Azoteq IQS620A multi-function 278 sensor. 279 280 To compile this driver as a module, choose M here: the module will 281 be called pwm-iqs620a. 282 283config PWM_JZ4740 284 tristate "Ingenic JZ47xx PWM support" 285 depends on MACH_INGENIC || COMPILE_TEST 286 depends on COMMON_CLK && OF 287 select MFD_SYSCON 288 help 289 Generic PWM framework driver for Ingenic JZ47xx based 290 machines. 291 292 To compile this driver as a module, choose M here: the module 293 will be called pwm-jz4740. 294 295config PWM_KEEMBAY 296 tristate "Intel Keem Bay PWM driver" 297 depends on ARCH_KEEMBAY || COMPILE_TEST 298 depends on COMMON_CLK && HAS_IOMEM 299 help 300 The platform driver for Intel Keem Bay PWM controller. 301 302 To compile this driver as a module, choose M here: the module 303 will be called pwm-keembay. 304 305config PWM_LP3943 306 tristate "TI/National Semiconductor LP3943 PWM support" 307 depends on MFD_LP3943 308 help 309 Generic PWM framework driver for LP3943 which supports two PWM 310 channels. 311 312 To compile this driver as a module, choose M here: the module 313 will be called pwm-lp3943. 314 315config PWM_LPC18XX_SCT 316 tristate "LPC18xx/43xx PWM/SCT support" 317 depends on ARCH_LPC18XX || COMPILE_TEST 318 depends on HAS_IOMEM 319 help 320 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 321 supports 16 channels. 322 A maximum of 15 channels can be requested simultaneously and 323 must have the same period. 324 325 To compile this driver as a module, choose M here: the module 326 will be called pwm-lpc18xx-sct. 327 328config PWM_LPC32XX 329 tristate "LPC32XX PWM support" 330 depends on ARCH_LPC32XX || COMPILE_TEST 331 depends on HAS_IOMEM 332 help 333 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 334 PWM controllers. 335 336 To compile this driver as a module, choose M here: the module 337 will be called pwm-lpc32xx. 338 339config PWM_LPSS 340 depends on HAS_IOMEM 341 tristate 342 343config PWM_LPSS_PCI 344 tristate "Intel LPSS PWM PCI driver" 345 depends on X86 || COMPILE_TEST 346 depends on HAS_IOMEM && PCI 347 select PWM_LPSS 348 help 349 The PCI 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-pci. 353 354config PWM_LPSS_PLATFORM 355 tristate "Intel LPSS PWM platform driver" 356 depends on (X86 && ACPI) || COMPILE_TEST 357 depends on HAS_IOMEM 358 select PWM_LPSS 359 help 360 The platform driver for Intel Low Power Subsystem PWM controller. 361 362 To compile this driver as a module, choose M here: the module 363 will be called pwm-lpss-platform. 364 365config PWM_MESON 366 tristate "Amlogic Meson PWM driver" 367 depends on ARCH_MESON || COMPILE_TEST 368 depends on COMMON_CLK && HAS_IOMEM 369 help 370 The platform driver for Amlogic Meson PWM controller. 371 372 To compile this driver as a module, choose M here: the module 373 will be called pwm-meson. 374 375config PWM_MTK_DISP 376 tristate "MediaTek display PWM driver" 377 depends on ARCH_MEDIATEK || COMPILE_TEST 378 depends on HAS_IOMEM 379 help 380 Generic PWM framework driver for MediaTek disp-pwm device. 381 The PWM is used to control the backlight brightness for display. 382 383 To compile this driver as a module, choose M here: the module 384 will be called pwm-mtk-disp. 385 386config PWM_MEDIATEK 387 tristate "MediaTek PWM support" 388 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST 389 depends on HAS_IOMEM 390 help 391 Generic PWM framework driver for Mediatek ARM SoC. 392 393 To compile this driver as a module, choose M here: the module 394 will be called pwm-mediatek. 395 396config PWM_MXS 397 tristate "Freescale MXS PWM support" 398 depends on ARCH_MXS || COMPILE_TEST 399 depends on HAS_IOMEM && OF 400 select STMP_DEVICE 401 help 402 Generic PWM framework driver for Freescale MXS. 403 404 To compile this driver as a module, choose M here: the module 405 will be called pwm-mxs. 406 407config PWM_NTXEC 408 tristate "Netronix embedded controller PWM support" 409 depends on MFD_NTXEC 410 help 411 Say yes here if you want to support the PWM output of the embedded 412 controller found in certain e-book readers designed by the original 413 design manufacturer Netronix. 414 415config PWM_OMAP_DMTIMER 416 tristate "OMAP Dual-Mode Timer PWM support" 417 depends on OF 418 depends on OMAP_DM_TIMER || COMPILE_TEST 419 help 420 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 421 422 To compile this driver as a module, choose M here: the module 423 will be called pwm-omap-dmtimer 424 425config PWM_PCA9685 426 tristate "NXP PCA9685 PWM driver" 427 depends on I2C 428 select REGMAP_I2C 429 help 430 Generic PWM framework driver for NXP PCA9685 LED controller. 431 432 To compile this driver as a module, choose M here: the module 433 will be called pwm-pca9685. 434 435config PWM_PXA 436 tristate "PXA PWM support" 437 depends on ARCH_PXA || ARCH_MMP || COMPILE_TEST 438 depends on HAS_IOMEM 439 help 440 Generic PWM framework driver for PXA. 441 442 To compile this driver as a module, choose M here: the module 443 will be called pwm-pxa. 444 445config PWM_RASPBERRYPI_POE 446 tristate "Raspberry Pi Firwmware PoE Hat PWM support" 447 # Make sure not 'y' when RASPBERRYPI_FIRMWARE is 'm'. This can only 448 # happen when COMPILE_TEST=y, hence the added !RASPBERRYPI_FIRMWARE. 449 depends on RASPBERRYPI_FIRMWARE || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE) 450 help 451 Enable Raspberry Pi firmware controller PWM bus used to control the 452 official RPI PoE hat 453 454config PWM_RCAR 455 tristate "Renesas R-Car PWM support" 456 depends on ARCH_RENESAS || COMPILE_TEST 457 depends on HAS_IOMEM 458 help 459 This driver exposes the PWM Timer controller found in Renesas 460 R-Car chips through the PWM API. 461 462 To compile this driver as a module, choose M here: the module 463 will be called pwm-rcar. 464 465config PWM_RENESAS_TPU 466 tristate "Renesas TPU PWM support" 467 depends on ARCH_RENESAS || COMPILE_TEST 468 depends on HAS_IOMEM 469 help 470 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 471 in Renesas chips through the PWM API. 472 473 To compile this driver as a module, choose M here: the module 474 will be called pwm-renesas-tpu. 475 476config PWM_ROCKCHIP 477 tristate "Rockchip PWM support" 478 depends on ARCH_ROCKCHIP || COMPILE_TEST 479 depends on HAS_IOMEM 480 help 481 Generic PWM framework driver for the PWM controller found on 482 Rockchip SoCs. 483 484config PWM_SAMSUNG 485 tristate "Samsung PWM support" 486 depends on PLAT_SAMSUNG || ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST 487 depends on HAS_IOMEM 488 help 489 Generic PWM framework driver for Samsung S3C24xx, S3C64xx, S5Pv210 490 and Exynos SoCs. 491 Choose Y here only if you build for such Samsung SoC. 492 493 To compile this driver as a module, choose M here: the module 494 will be called pwm-samsung. 495 496config PWM_SIFIVE 497 tristate "SiFive PWM support" 498 depends on OF 499 depends on COMMON_CLK && HAS_IOMEM 500 depends on RISCV || COMPILE_TEST 501 help 502 Generic PWM framework driver for SiFive SoCs. 503 504 To compile this driver as a module, choose M here: the module 505 will be called pwm-sifive. 506 507config PWM_SL28CPLD 508 tristate "Kontron sl28cpld PWM support" 509 depends on MFD_SL28CPLD || COMPILE_TEST 510 help 511 Generic PWM framework driver for board management controller 512 found on the Kontron sl28 CPLD. 513 514 To compile this driver as a module, choose M here: the module 515 will be called pwm-sl28cpld. 516 517config PWM_SPEAR 518 tristate "STMicroelectronics SPEAr PWM support" 519 depends on PLAT_SPEAR || COMPILE_TEST 520 depends on HAS_IOMEM && OF 521 help 522 Generic PWM framework driver for the PWM controller on ST 523 SPEAr SoCs. 524 525 To compile this driver as a module, choose M here: the module 526 will be called pwm-spear. 527 528config PWM_SPRD 529 tristate "Spreadtrum PWM support" 530 depends on ARCH_SPRD || COMPILE_TEST 531 depends on HAS_IOMEM 532 help 533 Generic PWM framework driver for the PWM controller on 534 Spreadtrum SoCs. 535 536 To compile this driver as a module, choose M here: the module 537 will be called pwm-sprd. 538 539config PWM_STI 540 tristate "STiH4xx PWM support" 541 depends on ARCH_STI || COMPILE_TEST 542 depends on HAS_IOMEM && OF 543 help 544 Generic PWM framework driver for STiH4xx SoCs. 545 546 To compile this driver as a module, choose M here: the module 547 will be called pwm-sti. 548 549config PWM_STM32 550 tristate "STMicroelectronics STM32 PWM" 551 depends on MFD_STM32_TIMERS || COMPILE_TEST 552 help 553 Generic PWM framework driver for STM32 SoCs. 554 555 To compile this driver as a module, choose M here: the module 556 will be called pwm-stm32. 557 558config PWM_STM32_LP 559 tristate "STMicroelectronics STM32 PWM LP" 560 depends on MFD_STM32_LPTIMER || COMPILE_TEST 561 help 562 Generic PWM framework driver for STMicroelectronics STM32 SoCs 563 with Low-Power Timer (LPTIM). 564 565 To compile this driver as a module, choose M here: the module 566 will be called pwm-stm32-lp. 567 568config PWM_STMPE 569 bool "STMPE expander PWM export" 570 depends on MFD_STMPE 571 help 572 This enables support for the PWMs found in the STMPE I/O 573 expanders. 574 575config PWM_SUN4I 576 tristate "Allwinner PWM support" 577 depends on ARCH_SUNXI || COMPILE_TEST 578 depends on HAS_IOMEM && COMMON_CLK 579 help 580 Generic PWM framework driver for Allwinner SoCs. 581 582 To compile this driver as a module, choose M here: the module 583 will be called pwm-sun4i. 584 585config PWM_SUNPLUS 586 tristate "Sunplus PWM support" 587 depends on ARCH_SUNPLUS || COMPILE_TEST 588 depends on HAS_IOMEM && OF 589 help 590 Generic PWM framework driver for the PWM controller on 591 Sunplus SoCs. 592 593 To compile this driver as a module, choose M here: the module 594 will be called pwm-sunplus. 595 596config PWM_TEGRA 597 tristate "NVIDIA Tegra PWM support" 598 depends on ARCH_TEGRA || COMPILE_TEST 599 depends on HAS_IOMEM 600 help 601 Generic PWM framework driver for the PWFM controller found on NVIDIA 602 Tegra SoCs. 603 604 To compile this driver as a module, choose M here: the module 605 will be called pwm-tegra. 606 607config PWM_TIECAP 608 tristate "ECAP PWM support" 609 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST 610 depends on HAS_IOMEM 611 help 612 PWM driver support for the ECAP APWM controller found on TI SOCs 613 614 To compile this driver as a module, choose M here: the module 615 will be called pwm-tiecap. 616 617config PWM_TIEHRPWM 618 tristate "EHRPWM PWM support" 619 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3 || COMPILE_TEST 620 depends on HAS_IOMEM 621 help 622 PWM driver support for the EHRPWM controller found on TI SOCs 623 624 To compile this driver as a module, choose M here: the module 625 will be called pwm-tiehrpwm. 626 627config PWM_TWL 628 tristate "TWL4030/6030 PWM support" 629 depends on TWL4030_CORE 630 help 631 Generic PWM framework driver for TWL4030/6030. 632 633 To compile this driver as a module, choose M here: the module 634 will be called pwm-twl. 635 636config PWM_TWL_LED 637 tristate "TWL4030/6030 PWM support for LED drivers" 638 depends on TWL4030_CORE 639 help 640 Generic PWM framework driver for TWL4030/6030 LED terminals. 641 642 To compile this driver as a module, choose M here: the module 643 will be called pwm-twl-led. 644 645config PWM_VISCONTI 646 tristate "Toshiba Visconti PWM support" 647 depends on ARCH_VISCONTI || COMPILE_TEST 648 help 649 PWM Subsystem driver support for Toshiba Visconti SoCs. 650 651 To compile this driver as a module, choose M here: the module 652 will be called pwm-visconti. 653 654config PWM_VT8500 655 tristate "vt8500 PWM support" 656 depends on ARCH_VT8500 || COMPILE_TEST 657 depends on HAS_IOMEM 658 help 659 Generic PWM framework driver for vt8500. 660 661 To compile this driver as a module, choose M here: the module 662 will be called pwm-vt8500. 663 664config PWM_XILINX 665 tristate "Xilinx AXI Timer PWM support" 666 depends on OF_ADDRESS 667 depends on COMMON_CLK 668 select REGMAP_MMIO 669 help 670 PWM driver for Xilinx LogiCORE IP AXI timers. This timer is 671 typically a soft core which may be present in Xilinx FPGAs. 672 This device may also be present in Microblaze soft processors. 673 If you don't have this IP in your design, choose N. 674 675 To compile this driver as a module, choose M here: the module 676 will be called pwm-xilinx. 677 678endif 679