1menuconfig PWM 2 bool "Pulse-Width Modulation (PWM) Support" 3 help 4 Generic Pulse-Width Modulation (PWM) support. 5 6 In Pulse-Width Modulation, a variation of the width of pulses 7 in a rectangular pulse signal is used as a means to alter the 8 average power of the signal. Applications include efficient 9 power delivery and voltage regulation. In computer systems, 10 PWMs are commonly used to control fans or the brightness of 11 display backlights. 12 13 This framework provides a generic interface to PWM devices 14 within the Linux kernel. On the driver side it provides an API 15 to register and unregister a PWM chip, an abstraction of a PWM 16 controller, that supports one or more PWM devices. Client 17 drivers can request PWM devices and use the generic framework 18 to configure as well as enable and disable them. 19 20 This generic framework replaces the legacy PWM framework which 21 allows only a single driver implementing the required API. Not 22 all legacy implementations have been ported to the framework 23 yet. The framework provides an API that is backward compatible 24 with the legacy framework so that existing client drivers 25 continue to work as expected. 26 27 If unsure, say no. 28 29if PWM 30 31config PWM_SYSFS 32 bool 33 default y if SYSFS 34 35config PWM_AB8500 36 tristate "AB8500 PWM support" 37 depends on AB8500_CORE && ARCH_U8500 38 help 39 Generic PWM framework driver for Analog Baseband AB8500. 40 41 To compile this driver as a module, choose M here: the module 42 will be called pwm-ab8500. 43 44config PWM_ATMEL 45 tristate "Atmel PWM support" 46 depends on ARCH_AT91 47 help 48 Generic PWM framework driver for Atmel SoC. 49 50 To compile this driver as a module, choose M here: the module 51 will be called pwm-atmel. 52 53config PWM_ATMEL_HLCDC_PWM 54 tristate "Atmel HLCDC PWM support" 55 depends on MFD_ATMEL_HLCDC 56 depends on HAVE_CLK 57 help 58 Generic PWM framework driver for the PWM output of the HLCDC 59 (Atmel High-end LCD Controller). This PWM output is mainly used 60 to control the LCD backlight. 61 62 To compile this driver as a module, choose M here: the module 63 will be called pwm-atmel-hlcdc. 64 65config PWM_ATMEL_TCB 66 tristate "Atmel TC Block PWM support" 67 depends on ATMEL_TCLIB && OF 68 help 69 Generic PWM framework driver for Atmel Timer Counter Block. 70 71 A Timer Counter Block provides 6 PWM devices grouped by 2. 72 Devices in a given group must have the same period. 73 74 To compile this driver as a module, choose M here: the module 75 will be called pwm-atmel-tcb. 76 77config PWM_BCM_IPROC 78 tristate "iProc PWM support" 79 depends on ARCH_BCM_IPROC || COMPILE_TEST 80 depends on COMMON_CLK 81 default ARCH_BCM_IPROC 82 help 83 Generic PWM framework driver for Broadcom iProc PWM block. This 84 block is used in Broadcom iProc SoC's. 85 86 To compile this driver as a module, choose M here: the module 87 will be called pwm-bcm-iproc. 88 89config PWM_BCM_KONA 90 tristate "Kona PWM support" 91 depends on ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS || COMPILE_TEST 92 depends on HAVE_CLK && HAS_IOMEM 93 default ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS 94 help 95 Generic PWM framework driver for Broadcom Kona PWM block. 96 97 To compile this driver as a module, choose M here: the module 98 will be called pwm-bcm-kona. 99 100config PWM_BCM2835 101 tristate "BCM2835 PWM support" 102 depends on ARCH_BCM2835 103 help 104 PWM framework driver for BCM2835 controller (Raspberry Pi) 105 106 To compile this driver as a module, choose M here: the module 107 will be called pwm-bcm2835. 108 109config PWM_BERLIN 110 tristate "Marvell Berlin PWM support" 111 depends on ARCH_BERLIN 112 help 113 PWM framework driver for Marvell Berlin SoCs. 114 115 To compile this driver as a module, choose M here: the module 116 will be called pwm-berlin. 117 118config PWM_BRCMSTB 119 tristate "Broadcom STB PWM support" 120 depends on ARCH_BRCMSTB || BMIPS_GENERIC 121 help 122 Generic PWM framework driver for the Broadcom Set-top-Box 123 SoCs (BCM7xxx). 124 125 To compile this driver as a module, choose M Here: the module 126 will be called pwm-brcmstb.c. 127 128config PWM_CLPS711X 129 tristate "CLPS711X PWM support" 130 depends on ARCH_CLPS711X || COMPILE_TEST 131 depends on HAS_IOMEM 132 help 133 Generic PWM framework driver for Cirrus Logic CLPS711X. 134 135 To compile this driver as a module, choose M here: the module 136 will be called pwm-clps711x. 137 138config PWM_CRC 139 bool "Intel Crystalcove (CRC) PWM support" 140 depends on X86 && INTEL_SOC_PMIC 141 help 142 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM 143 control. 144 145config PWM_CROS_EC 146 tristate "ChromeOS EC PWM driver" 147 depends on MFD_CROS_EC 148 help 149 PWM driver for exposing a PWM attached to the ChromeOS Embedded 150 Controller. 151 152config PWM_EP93XX 153 tristate "Cirrus Logic EP93xx PWM support" 154 depends on ARCH_EP93XX 155 help 156 Generic PWM framework driver for Cirrus Logic EP93xx. 157 158 To compile this driver as a module, choose M here: the module 159 will be called pwm-ep93xx. 160 161config PWM_FSL_FTM 162 tristate "Freescale FlexTimer Module (FTM) PWM support" 163 depends on HAS_IOMEM 164 depends on OF 165 select REGMAP_MMIO 166 help 167 Generic FTM PWM framework driver for Freescale VF610 and 168 Layerscape LS-1 SoCs. 169 170 To compile this driver as a module, choose M here: the module 171 will be called pwm-fsl-ftm. 172 173config PWM_HIBVT 174 tristate "HiSilicon BVT PWM support" 175 depends on ARCH_HISI || COMPILE_TEST 176 help 177 Generic PWM framework driver for HiSilicon BVT SoCs. 178 179 To compile this driver as a module, choose M here: the module 180 will be called pwm-hibvt. 181 182config PWM_IMG 183 tristate "Imagination Technologies PWM driver" 184 depends on HAS_IOMEM 185 depends on MFD_SYSCON 186 depends on COMMON_CLK 187 depends on MIPS || COMPILE_TEST 188 help 189 Generic PWM framework driver for Imagination Technologies 190 PWM block which supports 4 channels. 191 192 To compile this driver as a module, choose M here: the module 193 will be called pwm-img 194 195config PWM_IMX1 196 tristate "i.MX1 PWM support" 197 depends on ARCH_MXC 198 help 199 Generic PWM framework driver for i.MX1 and i.MX21 200 201 To compile this driver as a module, choose M here: the module 202 will be called pwm-imx1. 203 204config PWM_IMX27 205 tristate "i.MX27 PWM support" 206 depends on ARCH_MXC 207 help 208 Generic PWM framework driver for i.MX27 and later i.MX SoCs. 209 210 To compile this driver as a module, choose M here: the module 211 will be called pwm-imx27. 212 213config PWM_IMX_TPM 214 tristate "i.MX TPM PWM support" 215 depends on ARCH_MXC || COMPILE_TEST 216 depends on HAVE_CLK && HAS_IOMEM 217 help 218 Generic PWM framework driver for i.MX7ULP TPM module, TPM's full 219 name is Low Power Timer/Pulse Width Modulation Module. 220 221 To compile this driver as a module, choose M here: the module 222 will be called pwm-imx-tpm. 223 224config PWM_JZ4740 225 tristate "Ingenic JZ47xx PWM support" 226 depends on MACH_INGENIC 227 help 228 Generic PWM framework driver for Ingenic JZ47xx based 229 machines. 230 231 To compile this driver as a module, choose M here: the module 232 will be called pwm-jz4740. 233 234config PWM_LP3943 235 tristate "TI/National Semiconductor LP3943 PWM support" 236 depends on MFD_LP3943 237 help 238 Generic PWM framework driver for LP3943 which supports two PWM 239 channels. 240 241 To compile this driver as a module, choose M here: the module 242 will be called pwm-lp3943. 243 244config PWM_LPC18XX_SCT 245 tristate "LPC18xx/43xx PWM/SCT support" 246 depends on ARCH_LPC18XX 247 help 248 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 249 supports 16 channels. 250 A maximum of 15 channels can be requested simultaneously and 251 must have the same period. 252 253 To compile this driver as a module, choose M here: the module 254 will be called pwm-lpc18xx-sct. 255 256config PWM_LPC32XX 257 tristate "LPC32XX PWM support" 258 depends on ARCH_LPC32XX 259 help 260 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 261 PWM controllers. 262 263 To compile this driver as a module, choose M here: the module 264 will be called pwm-lpc32xx. 265 266config PWM_LPSS 267 tristate 268 269config PWM_LPSS_PCI 270 tristate "Intel LPSS PWM PCI driver" 271 depends on X86 && PCI 272 select PWM_LPSS 273 help 274 The PCI driver for Intel Low Power Subsystem PWM controller. 275 276 To compile this driver as a module, choose M here: the module 277 will be called pwm-lpss-pci. 278 279config PWM_LPSS_PLATFORM 280 tristate "Intel LPSS PWM platform driver" 281 depends on X86 && ACPI 282 select PWM_LPSS 283 help 284 The platform driver for Intel Low Power Subsystem PWM controller. 285 286 To compile this driver as a module, choose M here: the module 287 will be called pwm-lpss-platform. 288 289config PWM_MESON 290 tristate "Amlogic Meson PWM driver" 291 depends on ARCH_MESON 292 help 293 The platform driver for Amlogic Meson PWM controller. 294 295 To compile this driver as a module, choose M here: the module 296 will be called pwm-meson. 297 298config PWM_MTK_DISP 299 tristate "MediaTek display PWM driver" 300 depends on ARCH_MEDIATEK || COMPILE_TEST 301 depends on HAS_IOMEM 302 help 303 Generic PWM framework driver for MediaTek disp-pwm device. 304 The PWM is used to control the backlight brightness for display. 305 306 To compile this driver as a module, choose M here: the module 307 will be called pwm-mtk-disp. 308 309config PWM_MEDIATEK 310 tristate "MediaTek PWM support" 311 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST 312 help 313 Generic PWM framework driver for Mediatek ARM SoC. 314 315 To compile this driver as a module, choose M here: the module 316 will be called pwm-mediatek. 317 318config PWM_MXS 319 tristate "Freescale MXS PWM support" 320 depends on ARCH_MXS && OF 321 select STMP_DEVICE 322 help 323 Generic PWM framework driver for Freescale MXS. 324 325 To compile this driver as a module, choose M here: the module 326 will be called pwm-mxs. 327 328config PWM_OMAP_DMTIMER 329 tristate "OMAP Dual-Mode Timer PWM support" 330 depends on OF && ARCH_OMAP && OMAP_DM_TIMER 331 help 332 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 333 334 To compile this driver as a module, choose M here: the module 335 will be called pwm-omap-dmtimer 336 337config PWM_PCA9685 338 tristate "NXP PCA9685 PWM driver" 339 depends on I2C 340 select REGMAP_I2C 341 help 342 Generic PWM framework driver for NXP PCA9685 LED controller. 343 344 To compile this driver as a module, choose M here: the module 345 will be called pwm-pca9685. 346 347config PWM_PUV3 348 tristate "PKUnity NetBook-0916 PWM support" 349 depends on ARCH_PUV3 350 help 351 Generic PWM framework driver for PKUnity NetBook-0916. 352 353 To compile this driver as a module, choose M here: the module 354 will be called pwm-puv3. 355 356config PWM_PXA 357 tristate "PXA PWM support" 358 depends on ARCH_PXA 359 help 360 Generic PWM framework driver for PXA. 361 362 To compile this driver as a module, choose M here: the module 363 will be called pwm-pxa. 364 365config PWM_RCAR 366 tristate "Renesas R-Car PWM support" 367 depends on ARCH_RENESAS || COMPILE_TEST 368 depends on HAS_IOMEM 369 help 370 This driver exposes the PWM Timer controller found in Renesas 371 R-Car chips through the PWM API. 372 373 To compile this driver as a module, choose M here: the module 374 will be called pwm-rcar. 375 376config PWM_RENESAS_TPU 377 tristate "Renesas TPU PWM support" 378 depends on ARCH_RENESAS || COMPILE_TEST 379 depends on HAS_IOMEM 380 help 381 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 382 in Renesas chips through the PWM API. 383 384 To compile this driver as a module, choose M here: the module 385 will be called pwm-renesas-tpu. 386 387config PWM_ROCKCHIP 388 tristate "Rockchip PWM support" 389 depends on ARCH_ROCKCHIP 390 help 391 Generic PWM framework driver for the PWM controller found on 392 Rockchip SoCs. 393 394config PWM_SAMSUNG 395 tristate "Samsung PWM support" 396 depends on PLAT_SAMSUNG || ARCH_EXYNOS 397 help 398 Generic PWM framework driver for Samsung. 399 400 To compile this driver as a module, choose M here: the module 401 will be called pwm-samsung. 402 403config PWM_SPEAR 404 tristate "STMicroelectronics SPEAr PWM support" 405 depends on PLAT_SPEAR 406 depends on OF 407 help 408 Generic PWM framework driver for the PWM controller on ST 409 SPEAr SoCs. 410 411 To compile this driver as a module, choose M here: the module 412 will be called pwm-spear. 413 414config PWM_STI 415 tristate "STiH4xx PWM support" 416 depends on ARCH_STI 417 depends on OF 418 help 419 Generic PWM framework driver for STiH4xx SoCs. 420 421 To compile this driver as a module, choose M here: the module 422 will be called pwm-sti. 423 424config PWM_STM32 425 tristate "STMicroelectronics STM32 PWM" 426 depends on MFD_STM32_TIMERS 427 help 428 Generic PWM framework driver for STM32 SoCs. 429 430 To compile this driver as a module, choose M here: the module 431 will be called pwm-stm32. 432 433config PWM_STM32_LP 434 tristate "STMicroelectronics STM32 PWM LP" 435 depends on MFD_STM32_LPTIMER || COMPILE_TEST 436 help 437 Generic PWM framework driver for STMicroelectronics STM32 SoCs 438 with Low-Power Timer (LPTIM). 439 440 To compile this driver as a module, choose M here: the module 441 will be called pwm-stm32-lp. 442 443config PWM_STMPE 444 bool "STMPE expander PWM export" 445 depends on MFD_STMPE 446 help 447 This enables support for the PWMs found in the STMPE I/O 448 expanders. 449 450config PWM_SUN4I 451 tristate "Allwinner PWM support" 452 depends on ARCH_SUNXI || COMPILE_TEST 453 depends on HAS_IOMEM && COMMON_CLK 454 help 455 Generic PWM framework driver for Allwinner SoCs. 456 457 To compile this driver as a module, choose M here: the module 458 will be called pwm-sun4i. 459 460config PWM_TEGRA 461 tristate "NVIDIA Tegra PWM support" 462 depends on ARCH_TEGRA 463 help 464 Generic PWM framework driver for the PWFM controller found on NVIDIA 465 Tegra SoCs. 466 467 To compile this driver as a module, choose M here: the module 468 will be called pwm-tegra. 469 470config PWM_TIECAP 471 tristate "ECAP PWM support" 472 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 473 help 474 PWM driver support for the ECAP APWM controller found on TI SOCs 475 476 To compile this driver as a module, choose M here: the module 477 will be called pwm-tiecap. 478 479config PWM_TIEHRPWM 480 tristate "EHRPWM PWM support" 481 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_K3 482 help 483 PWM driver support for the EHRPWM controller found on TI SOCs 484 485 To compile this driver as a module, choose M here: the module 486 will be called pwm-tiehrpwm. 487 488config PWM_TIPWMSS 489 bool 490 default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM) 491 help 492 PWM Subsystem driver support for AM33xx SOC. 493 494 PWM submodules require PWM config space access from submodule 495 drivers and require common parent driver support. 496 497config PWM_TWL 498 tristate "TWL4030/6030 PWM support" 499 depends on TWL4030_CORE 500 help 501 Generic PWM framework driver for TWL4030/6030. 502 503 To compile this driver as a module, choose M here: the module 504 will be called pwm-twl. 505 506config PWM_TWL_LED 507 tristate "TWL4030/6030 PWM support for LED drivers" 508 depends on TWL4030_CORE 509 help 510 Generic PWM framework driver for TWL4030/6030 LED terminals. 511 512 To compile this driver as a module, choose M here: the module 513 will be called pwm-twl-led. 514 515config PWM_VT8500 516 tristate "vt8500 PWM support" 517 depends on ARCH_VT8500 518 help 519 Generic PWM framework driver for vt8500. 520 521 To compile this driver as a module, choose M here: the module 522 will be called pwm-vt8500. 523 524config PWM_ZX 525 tristate "ZTE ZX PWM support" 526 depends on ARCH_ZX 527 help 528 Generic PWM framework driver for ZTE ZX family SoCs. 529 530 To compile this driver as a module, choose M here: the module 531 will be called pwm-zx. 532 533endif 534