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 92 help 93 Generic PWM framework driver for Broadcom Kona PWM block. 94 95 To compile this driver as a module, choose M here: the module 96 will be called pwm-bcm-kona. 97 98config PWM_BCM2835 99 tristate "BCM2835 PWM support" 100 depends on ARCH_BCM2835 101 help 102 PWM framework driver for BCM2835 controller (Raspberry Pi) 103 104 To compile this driver as a module, choose M here: the module 105 will be called pwm-bcm2835. 106 107config PWM_BERLIN 108 tristate "Marvell Berlin PWM support" 109 depends on ARCH_BERLIN 110 help 111 PWM framework driver for Marvell Berlin SoCs. 112 113 To compile this driver as a module, choose M here: the module 114 will be called pwm-berlin. 115 116config PWM_BRCMSTB 117 tristate "Broadcom STB PWM support" 118 depends on ARCH_BRCMSTB || BMIPS_GENERIC 119 help 120 Generic PWM framework driver for the Broadcom Set-top-Box 121 SoCs (BCM7xxx). 122 123 To compile this driver as a module, choose M Here: the module 124 will be called pwm-brcmstb.c. 125 126config PWM_CLPS711X 127 tristate "CLPS711X PWM support" 128 depends on ARCH_CLPS711X || COMPILE_TEST 129 depends on HAS_IOMEM 130 help 131 Generic PWM framework driver for Cirrus Logic CLPS711X. 132 133 To compile this driver as a module, choose M here: the module 134 will be called pwm-clps711x. 135 136config PWM_CRC 137 bool "Intel Crystalcove (CRC) PWM support" 138 depends on X86 && INTEL_SOC_PMIC 139 help 140 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM 141 control. 142 143config PWM_CROS_EC 144 tristate "ChromeOS EC PWM driver" 145 depends on MFD_CROS_EC 146 help 147 PWM driver for exposing a PWM attached to the ChromeOS Embedded 148 Controller. 149 150config PWM_EP93XX 151 tristate "Cirrus Logic EP93xx PWM support" 152 depends on ARCH_EP93XX 153 help 154 Generic PWM framework driver for Cirrus Logic EP93xx. 155 156 To compile this driver as a module, choose M here: the module 157 will be called pwm-ep93xx. 158 159config PWM_FSL_FTM 160 tristate "Freescale FlexTimer Module (FTM) PWM support" 161 depends on HAS_IOMEM 162 depends on OF 163 select REGMAP_MMIO 164 help 165 Generic FTM PWM framework driver for Freescale VF610 and 166 Layerscape LS-1 SoCs. 167 168 To compile this driver as a module, choose M here: the module 169 will be called pwm-fsl-ftm. 170 171config PWM_HIBVT 172 tristate "HiSilicon BVT PWM support" 173 depends on ARCH_HISI || COMPILE_TEST 174 help 175 Generic PWM framework driver for HiSilicon BVT SoCs. 176 177 To compile this driver as a module, choose M here: the module 178 will be called pwm-hibvt. 179 180config PWM_IMG 181 tristate "Imagination Technologies PWM driver" 182 depends on HAS_IOMEM 183 depends on MFD_SYSCON 184 depends on COMMON_CLK 185 depends on MIPS || COMPILE_TEST 186 help 187 Generic PWM framework driver for Imagination Technologies 188 PWM block which supports 4 channels. 189 190 To compile this driver as a module, choose M here: the module 191 will be called pwm-img 192 193config PWM_IMX 194 tristate "i.MX PWM support" 195 depends on ARCH_MXC 196 help 197 Generic PWM framework driver for i.MX. 198 199 To compile this driver as a module, choose M here: the module 200 will be called pwm-imx. 201 202config PWM_JZ4740 203 tristate "Ingenic JZ47xx PWM support" 204 depends on MACH_INGENIC 205 help 206 Generic PWM framework driver for Ingenic JZ47xx based 207 machines. 208 209 To compile this driver as a module, choose M here: the module 210 will be called pwm-jz4740. 211 212config PWM_LP3943 213 tristate "TI/National Semiconductor LP3943 PWM support" 214 depends on MFD_LP3943 215 help 216 Generic PWM framework driver for LP3943 which supports two PWM 217 channels. 218 219 To compile this driver as a module, choose M here: the module 220 will be called pwm-lp3943. 221 222config PWM_LPC18XX_SCT 223 tristate "LPC18xx/43xx PWM/SCT support" 224 depends on ARCH_LPC18XX 225 help 226 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 227 supports 16 channels. 228 A maximum of 15 channels can be requested simultaneously and 229 must have the same period. 230 231 To compile this driver as a module, choose M here: the module 232 will be called pwm-lpc18xx-sct. 233 234config PWM_LPC32XX 235 tristate "LPC32XX PWM support" 236 depends on ARCH_LPC32XX 237 help 238 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 239 PWM controllers. 240 241 To compile this driver as a module, choose M here: the module 242 will be called pwm-lpc32xx. 243 244config PWM_LPSS 245 tristate 246 247config PWM_LPSS_PCI 248 tristate "Intel LPSS PWM PCI driver" 249 depends on X86 && PCI 250 select PWM_LPSS 251 help 252 The PCI driver for Intel Low Power Subsystem PWM controller. 253 254 To compile this driver as a module, choose M here: the module 255 will be called pwm-lpss-pci. 256 257config PWM_LPSS_PLATFORM 258 tristate "Intel LPSS PWM platform driver" 259 depends on X86 && ACPI 260 select PWM_LPSS 261 help 262 The platform driver for Intel Low Power Subsystem PWM controller. 263 264 To compile this driver as a module, choose M here: the module 265 will be called pwm-lpss-platform. 266 267config PWM_MESON 268 tristate "Amlogic Meson PWM driver" 269 depends on ARCH_MESON 270 help 271 The platform driver for Amlogic Meson PWM controller. 272 273 To compile this driver as a module, choose M here: the module 274 will be called pwm-meson. 275 276config PWM_MTK_DISP 277 tristate "MediaTek display PWM driver" 278 depends on ARCH_MEDIATEK || COMPILE_TEST 279 depends on HAS_IOMEM 280 help 281 Generic PWM framework driver for MediaTek disp-pwm device. 282 The PWM is used to control the backlight brightness for display. 283 284 To compile this driver as a module, choose M here: the module 285 will be called pwm-mtk-disp. 286 287config PWM_MEDIATEK 288 tristate "MediaTek PWM support" 289 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST 290 help 291 Generic PWM framework driver for Mediatek ARM SoC. 292 293 To compile this driver as a module, choose M here: the module 294 will be called pwm-mediatek. 295 296config PWM_MXS 297 tristate "Freescale MXS PWM support" 298 depends on ARCH_MXS && OF 299 select STMP_DEVICE 300 help 301 Generic PWM framework driver for Freescale MXS. 302 303 To compile this driver as a module, choose M here: the module 304 will be called pwm-mxs. 305 306config PWM_OMAP_DMTIMER 307 tristate "OMAP Dual-Mode Timer PWM support" 308 depends on OF && ARCH_OMAP && OMAP_DM_TIMER 309 help 310 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 311 312 To compile this driver as a module, choose M here: the module 313 will be called pwm-omap-dmtimer 314 315config PWM_PCA9685 316 tristate "NXP PCA9685 PWM driver" 317 depends on I2C 318 select REGMAP_I2C 319 help 320 Generic PWM framework driver for NXP PCA9685 LED controller. 321 322 To compile this driver as a module, choose M here: the module 323 will be called pwm-pca9685. 324 325config PWM_PUV3 326 tristate "PKUnity NetBook-0916 PWM support" 327 depends on ARCH_PUV3 328 help 329 Generic PWM framework driver for PKUnity NetBook-0916. 330 331 To compile this driver as a module, choose M here: the module 332 will be called pwm-puv3. 333 334config PWM_PXA 335 tristate "PXA PWM support" 336 depends on ARCH_PXA 337 help 338 Generic PWM framework driver for PXA. 339 340 To compile this driver as a module, choose M here: the module 341 will be called pwm-pxa. 342 343config PWM_RCAR 344 tristate "Renesas R-Car PWM support" 345 depends on ARCH_RENESAS || COMPILE_TEST 346 depends on HAS_IOMEM 347 help 348 This driver exposes the PWM Timer controller found in Renesas 349 R-Car chips through the PWM API. 350 351 To compile this driver as a module, choose M here: the module 352 will be called pwm-rcar. 353 354config PWM_RENESAS_TPU 355 tristate "Renesas TPU PWM support" 356 depends on ARCH_RENESAS || COMPILE_TEST 357 depends on HAS_IOMEM 358 help 359 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 360 in Renesas chips through the PWM API. 361 362 To compile this driver as a module, choose M here: the module 363 will be called pwm-renesas-tpu. 364 365config PWM_ROCKCHIP 366 tristate "Rockchip PWM support" 367 depends on ARCH_ROCKCHIP 368 help 369 Generic PWM framework driver for the PWM controller found on 370 Rockchip SoCs. 371 372config PWM_SAMSUNG 373 tristate "Samsung PWM support" 374 depends on PLAT_SAMSUNG || ARCH_EXYNOS 375 help 376 Generic PWM framework driver for Samsung. 377 378 To compile this driver as a module, choose M here: the module 379 will be called pwm-samsung. 380 381config PWM_SPEAR 382 tristate "STMicroelectronics SPEAr PWM support" 383 depends on PLAT_SPEAR 384 depends on OF 385 help 386 Generic PWM framework driver for the PWM controller on ST 387 SPEAr SoCs. 388 389 To compile this driver as a module, choose M here: the module 390 will be called pwm-spear. 391 392config PWM_STI 393 tristate "STiH4xx PWM support" 394 depends on ARCH_STI 395 depends on OF 396 help 397 Generic PWM framework driver for STiH4xx SoCs. 398 399 To compile this driver as a module, choose M here: the module 400 will be called pwm-sti. 401 402config PWM_STM32 403 tristate "STMicroelectronics STM32 PWM" 404 depends on MFD_STM32_TIMERS 405 help 406 Generic PWM framework driver for STM32 SoCs. 407 408 To compile this driver as a module, choose M here: the module 409 will be called pwm-stm32. 410 411config PWM_STM32_LP 412 tristate "STMicroelectronics STM32 PWM LP" 413 depends on MFD_STM32_LPTIMER || COMPILE_TEST 414 help 415 Generic PWM framework driver for STMicroelectronics STM32 SoCs 416 with Low-Power Timer (LPTIM). 417 418 To compile this driver as a module, choose M here: the module 419 will be called pwm-stm32-lp. 420 421config PWM_STMPE 422 bool "STMPE expander PWM export" 423 depends on MFD_STMPE 424 help 425 This enables support for the PWMs found in the STMPE I/O 426 expanders. 427 428config PWM_SUN4I 429 tristate "Allwinner PWM support" 430 depends on ARCH_SUNXI || COMPILE_TEST 431 depends on HAS_IOMEM && COMMON_CLK 432 help 433 Generic PWM framework driver for Allwinner SoCs. 434 435 To compile this driver as a module, choose M here: the module 436 will be called pwm-sun4i. 437 438config PWM_TEGRA 439 tristate "NVIDIA Tegra PWM support" 440 depends on ARCH_TEGRA 441 help 442 Generic PWM framework driver for the PWFM controller found on NVIDIA 443 Tegra SoCs. 444 445 To compile this driver as a module, choose M here: the module 446 will be called pwm-tegra. 447 448config PWM_TIECAP 449 tristate "ECAP PWM support" 450 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE 451 help 452 PWM driver support for the ECAP APWM controller found on AM33XX 453 TI SOC 454 455 To compile this driver as a module, choose M here: the module 456 will be called pwm-tiecap. 457 458config PWM_TIEHRPWM 459 tristate "EHRPWM PWM support" 460 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX 461 help 462 PWM driver support for the EHRPWM controller found on AM33XX 463 TI SOC 464 465 To compile this driver as a module, choose M here: the module 466 will be called pwm-tiehrpwm. 467 468config PWM_TIPWMSS 469 bool 470 default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM) 471 help 472 PWM Subsystem driver support for AM33xx SOC. 473 474 PWM submodules require PWM config space access from submodule 475 drivers and require common parent driver support. 476 477config PWM_TWL 478 tristate "TWL4030/6030 PWM support" 479 depends on TWL4030_CORE 480 help 481 Generic PWM framework driver for TWL4030/6030. 482 483 To compile this driver as a module, choose M here: the module 484 will be called pwm-twl. 485 486config PWM_TWL_LED 487 tristate "TWL4030/6030 PWM support for LED drivers" 488 depends on TWL4030_CORE 489 help 490 Generic PWM framework driver for TWL4030/6030 LED terminals. 491 492 To compile this driver as a module, choose M here: the module 493 will be called pwm-twl-led. 494 495config PWM_VT8500 496 tristate "vt8500 PWM support" 497 depends on ARCH_VT8500 498 help 499 Generic PWM framework driver for vt8500. 500 501 To compile this driver as a module, choose M here: the module 502 will be called pwm-vt8500. 503 504config PWM_ZX 505 tristate "ZTE ZX PWM support" 506 depends on ARCH_ZX 507 help 508 Generic PWM framework driver for ZTE ZX family SoCs. 509 510 To compile this driver as a module, choose M here: the module 511 will be called pwm-zx. 512 513endif 514