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_GPIO 185 tristate "Generic GPIO bit-banged PWM driver" 186 depends on OF 187 depends on GPIOLIB 188 help 189 Some platforms do not offer any hardware PWM capabilities but do have 190 General Purpose Input Output (GPIO) pins available. Using the kernels 191 High-Resolution Timer API this driver tries to toggle GPIO using the 192 generic kernel PWM framework. The maximum frequency and/or accuracy 193 is dependent on several factors such as system load and the maximum 194 speed a pin can be toggled at the hardware. 195 196 To compile this driver as a module, choose M here: the module 197 will be called pwm-gpio. 198 199config PWM_HIBVT 200 tristate "HiSilicon BVT PWM support" 201 depends on ARCH_HISI || COMPILE_TEST 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 help 225 Generic PWM framework driver for i.MX1 and i.MX21 226 227 To compile this driver as a module, choose M here: the module 228 will be called pwm-imx1. 229 230config PWM_IMX27 231 tristate "i.MX27 PWM support" 232 depends on ARCH_MXC || COMPILE_TEST 233 help 234 Generic PWM framework driver for i.MX27 and later i.MX SoCs. 235 236 To compile this driver as a module, choose M here: the module 237 will be called pwm-imx27. 238 239config PWM_IMX_TPM 240 tristate "i.MX TPM PWM support" 241 depends on ARCH_MXC || COMPILE_TEST 242 depends on HAVE_CLK && HAS_IOMEM 243 help 244 Generic PWM framework driver for i.MX7ULP TPM module, TPM's full 245 name is Low Power Timer/Pulse Width Modulation Module. 246 247 To compile this driver as a module, choose M here: the module 248 will be called pwm-imx-tpm. 249 250config PWM_IQS620A 251 tristate "Azoteq IQS620A PWM support" 252 depends on MFD_IQS62X || COMPILE_TEST 253 help 254 Generic PWM framework driver for the Azoteq IQS620A multi-function 255 sensor. 256 257 To compile this driver as a module, choose M here: the module will 258 be called pwm-iqs620a. 259 260config PWM_JZ4740 261 tristate "Ingenic JZ47xx PWM support" 262 depends on MIPS 263 depends on COMMON_CLK 264 select MFD_SYSCON 265 help 266 Generic PWM framework driver for Ingenic JZ47xx based 267 machines. 268 269 To compile this driver as a module, choose M here: the module 270 will be called pwm-jz4740. 271 272config PWM_LP3943 273 tristate "TI/National Semiconductor LP3943 PWM support" 274 depends on MFD_LP3943 275 help 276 Generic PWM framework driver for LP3943 which supports two PWM 277 channels. 278 279 To compile this driver as a module, choose M here: the module 280 will be called pwm-lp3943. 281 282config PWM_LPC18XX_SCT 283 tristate "LPC18xx/43xx PWM/SCT support" 284 depends on ARCH_LPC18XX || COMPILE_TEST 285 help 286 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 287 supports 16 channels. 288 A maximum of 15 channels can be requested simultaneously and 289 must have the same period. 290 291 To compile this driver as a module, choose M here: the module 292 will be called pwm-lpc18xx-sct. 293 294config PWM_LPC32XX 295 tristate "LPC32XX PWM support" 296 depends on ARCH_LPC32XX || COMPILE_TEST 297 help 298 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 299 PWM controllers. 300 301 To compile this driver as a module, choose M here: the module 302 will be called pwm-lpc32xx. 303 304config PWM_LPSS 305 tristate 306 307config PWM_LPSS_PCI 308 tristate "Intel LPSS PWM PCI driver" 309 depends on X86 && PCI 310 select PWM_LPSS 311 help 312 The PCI driver for Intel Low Power Subsystem PWM controller. 313 314 To compile this driver as a module, choose M here: the module 315 will be called pwm-lpss-pci. 316 317config PWM_LPSS_PLATFORM 318 tristate "Intel LPSS PWM platform driver" 319 depends on X86 && ACPI 320 select PWM_LPSS 321 help 322 The platform driver for Intel Low Power Subsystem PWM controller. 323 324 To compile this driver as a module, choose M here: the module 325 will be called pwm-lpss-platform. 326 327config PWM_MESON 328 tristate "Amlogic Meson PWM driver" 329 depends on ARCH_MESON || COMPILE_TEST 330 depends on COMMON_CLK 331 help 332 The platform driver for Amlogic Meson PWM controller. 333 334 To compile this driver as a module, choose M here: the module 335 will be called pwm-meson. 336 337config PWM_MTK_DISP 338 tristate "MediaTek display PWM driver" 339 depends on ARCH_MEDIATEK || COMPILE_TEST 340 depends on HAS_IOMEM 341 help 342 Generic PWM framework driver for MediaTek disp-pwm device. 343 The PWM is used to control the backlight brightness for display. 344 345 To compile this driver as a module, choose M here: the module 346 will be called pwm-mtk-disp. 347 348config PWM_MEDIATEK 349 tristate "MediaTek PWM support" 350 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST 351 help 352 Generic PWM framework driver for Mediatek ARM SoC. 353 354 To compile this driver as a module, choose M here: the module 355 will be called pwm-mediatek. 356 357config PWM_MXS 358 tristate "Freescale MXS PWM support" 359 depends on OF 360 depends on ARCH_MXS || COMPILE_TEST 361 select STMP_DEVICE 362 help 363 Generic PWM framework driver for Freescale MXS. 364 365 To compile this driver as a module, choose M here: the module 366 will be called pwm-mxs. 367 368config PWM_OMAP_DMTIMER 369 tristate "OMAP Dual-Mode Timer PWM support" 370 depends on OF 371 depends on OMAP_DM_TIMER || COMPILE_TEST 372 help 373 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 374 375 To compile this driver as a module, choose M here: the module 376 will be called pwm-omap-dmtimer 377 378config PWM_PCA9685 379 tristate "NXP PCA9685 PWM driver" 380 depends on I2C 381 select REGMAP_I2C 382 help 383 Generic PWM framework driver for NXP PCA9685 LED controller. 384 385 To compile this driver as a module, choose M here: the module 386 will be called pwm-pca9685. 387 388config PWM_PXA 389 tristate "PXA PWM support" 390 depends on ARCH_PXA || COMPILE_TEST 391 help 392 Generic PWM framework driver for PXA. 393 394 To compile this driver as a module, choose M here: the module 395 will be called pwm-pxa. 396 397config PWM_RCAR 398 tristate "Renesas R-Car PWM support" 399 depends on ARCH_RENESAS || COMPILE_TEST 400 depends on HAS_IOMEM 401 help 402 This driver exposes the PWM Timer controller found in Renesas 403 R-Car chips through the PWM API. 404 405 To compile this driver as a module, choose M here: the module 406 will be called pwm-rcar. 407 408config PWM_RENESAS_TPU 409 tristate "Renesas TPU PWM support" 410 depends on ARCH_RENESAS || COMPILE_TEST 411 depends on HAS_IOMEM 412 help 413 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 414 in Renesas chips through the PWM API. 415 416 To compile this driver as a module, choose M here: the module 417 will be called pwm-renesas-tpu. 418 419config PWM_ROCKCHIP 420 tristate "Rockchip PWM support" 421 depends on ARCH_ROCKCHIP || COMPILE_TEST 422 help 423 Generic PWM framework driver for the PWM controller found on 424 Rockchip SoCs. 425 426config PWM_ROCKCHIP_ONESHOT 427 bool "Rockchip PWM oneshot mode support" 428 depends on PWM_ROCKCHIP && NO_GKI 429 help 430 Support Rockchip pwm oneshot mode for specified number of cycles. 431 432config PWM_SAMSUNG 433 tristate "Samsung PWM support" 434 depends on PLAT_SAMSUNG || ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST 435 help 436 Generic PWM framework driver for Samsung. 437 438 To compile this driver as a module, choose M here: the module 439 will be called pwm-samsung. 440 441config PWM_SIFIVE 442 tristate "SiFive PWM support" 443 depends on OF 444 depends on COMMON_CLK 445 depends on RISCV || COMPILE_TEST 446 help 447 Generic PWM framework driver for SiFive SoCs. 448 449 To compile this driver as a module, choose M here: the module 450 will be called pwm-sifive. 451 452config PWM_SL28CPLD 453 tristate "Kontron sl28cpld PWM support" 454 depends on MFD_SL28CPLD || COMPILE_TEST 455 help 456 Generic PWM framework driver for board management controller 457 found on the Kontron sl28 CPLD. 458 459 To compile this driver as a module, choose M here: the module 460 will be called pwm-sl28cpld. 461 462config PWM_SPEAR 463 tristate "STMicroelectronics SPEAr PWM support" 464 depends on PLAT_SPEAR || COMPILE_TEST 465 depends on OF 466 help 467 Generic PWM framework driver for the PWM controller on ST 468 SPEAr SoCs. 469 470 To compile this driver as a module, choose M here: the module 471 will be called pwm-spear. 472 473config PWM_SPRD 474 tristate "Spreadtrum PWM support" 475 depends on ARCH_SPRD || COMPILE_TEST 476 depends on HAS_IOMEM 477 help 478 Generic PWM framework driver for the PWM controller on 479 Spreadtrum SoCs. 480 481 To compile this driver as a module, choose M here: the module 482 will be called pwm-sprd. 483 484config PWM_STI 485 tristate "STiH4xx PWM support" 486 depends on ARCH_STI || COMPILE_TEST 487 depends on OF 488 help 489 Generic PWM framework driver for STiH4xx SoCs. 490 491 To compile this driver as a module, choose M here: the module 492 will be called pwm-sti. 493 494config PWM_STM32 495 tristate "STMicroelectronics STM32 PWM" 496 depends on MFD_STM32_TIMERS || COMPILE_TEST 497 help 498 Generic PWM framework driver for STM32 SoCs. 499 500 To compile this driver as a module, choose M here: the module 501 will be called pwm-stm32. 502 503config PWM_STM32_LP 504 tristate "STMicroelectronics STM32 PWM LP" 505 depends on MFD_STM32_LPTIMER || COMPILE_TEST 506 help 507 Generic PWM framework driver for STMicroelectronics STM32 SoCs 508 with Low-Power Timer (LPTIM). 509 510 To compile this driver as a module, choose M here: the module 511 will be called pwm-stm32-lp. 512 513config PWM_STMPE 514 bool "STMPE expander PWM export" 515 depends on MFD_STMPE 516 help 517 This enables support for the PWMs found in the STMPE I/O 518 expanders. 519 520config PWM_SUN4I 521 tristate "Allwinner PWM support" 522 depends on ARCH_SUNXI || COMPILE_TEST 523 depends on HAS_IOMEM && COMMON_CLK 524 help 525 Generic PWM framework driver for Allwinner SoCs. 526 527 To compile this driver as a module, choose M here: the module 528 will be called pwm-sun4i. 529 530config PWM_TEGRA 531 tristate "NVIDIA Tegra PWM support" 532 depends on ARCH_TEGRA || COMPILE_TEST 533 help 534 Generic PWM framework driver for the PWFM controller found on NVIDIA 535 Tegra SoCs. 536 537 To compile this driver as a module, choose M here: the module 538 will be called pwm-tegra. 539 540config PWM_TIECAP 541 tristate "ECAP PWM support" 542 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST 543 help 544 PWM driver support for the ECAP APWM controller found on TI SOCs 545 546 To compile this driver as a module, choose M here: the module 547 will be called pwm-tiecap. 548 549config PWM_TIEHRPWM 550 tristate "EHRPWM PWM support" 551 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3 || COMPILE_TEST 552 help 553 PWM driver support for the EHRPWM controller found on TI SOCs 554 555 To compile this driver as a module, choose M here: the module 556 will be called pwm-tiehrpwm. 557 558config PWM_TWL 559 tristate "TWL4030/6030 PWM support" 560 depends on TWL4030_CORE 561 help 562 Generic PWM framework driver for TWL4030/6030. 563 564 To compile this driver as a module, choose M here: the module 565 will be called pwm-twl. 566 567config PWM_TWL_LED 568 tristate "TWL4030/6030 PWM support for LED drivers" 569 depends on TWL4030_CORE 570 help 571 Generic PWM framework driver for TWL4030/6030 LED terminals. 572 573 To compile this driver as a module, choose M here: the module 574 will be called pwm-twl-led. 575 576config PWM_VT8500 577 tristate "vt8500 PWM support" 578 depends on ARCH_VT8500 || COMPILE_TEST 579 help 580 Generic PWM framework driver for vt8500. 581 582 To compile this driver as a module, choose M here: the module 583 will be called pwm-vt8500. 584 585config PWM_ZX 586 tristate "ZTE ZX PWM support" 587 depends on ARCH_ZX || COMPILE_TEST 588 help 589 Generic PWM framework driver for ZTE ZX family SoCs. 590 591 To compile this driver as a module, choose M here: the module 592 will be called pwm-zx. 593 594endif 595